diff options
Diffstat (limited to 'libcurl/src/lib/http.c')
| -rw-r--r-- | libcurl/src/lib/http.c | 3717 |
1 files changed, 3717 insertions, 0 deletions
diff --git a/libcurl/src/lib/http.c b/libcurl/src/lib/http.c new file mode 100644 index 0000000..753949c --- /dev/null +++ b/libcurl/src/lib/http.c @@ -0,0 +1,3717 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifndef CURL_DISABLE_HTTP
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#include "urldata.h"
+#include <curl/curl.h>
+#include "transfer.h"
+#include "sendf.h"
+#include "formdata.h"
+#include "progress.h"
+#include "curl_base64.h"
+#include "cookie.h"
+#include "strequal.h"
+#include "vtls/vtls.h"
+#include "http_digest.h"
+#include "curl_ntlm.h"
+#include "curl_ntlm_wb.h"
+#include "http_negotiate.h"
+#include "url.h"
+#include "share.h"
+#include "hostip.h"
+#include "http.h"
+#include "select.h"
+#include "parsedate.h" /* for the week day and month names */
+#include "strtoofft.h"
+#include "multiif.h"
+#include "rawstr.h"
+#include "content_encoding.h"
+#include "http_proxy.h"
+#include "warnless.h"
+#include "non-ascii.h"
+#include "bundles.h"
+#include "pipeline.h"
+#include "http2.h"
+#include "connect.h"
+#include "curl_printf.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+/*
+ * Forward declarations.
+ */
+
+static int http_getsock_do(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks);
+static int http_should_fail(struct connectdata *conn);
+
+#ifdef USE_SSL
+static CURLcode https_connecting(struct connectdata *conn, bool *done);
+static int https_getsock(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks);
+#else
+#define https_connecting(x,y) CURLE_COULDNT_CONNECT
+#endif
+
+/*
+ * HTTP handler interface.
+ */
+CURL_STATIC_VAR const struct Curl_handler Curl_handler_http = {
+ "HTTP", /* scheme */
+ Curl_http_setup_conn, /* setup_connection */
+ Curl_http, /* do_it */
+ Curl_http_done, /* done */
+ ZERO_NULL, /* do_more */
+ Curl_http_connect, /* connect_it */
+ ZERO_NULL, /* connecting */
+ ZERO_NULL, /* doing */
+ ZERO_NULL, /* proto_getsock */
+ http_getsock_do, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ZERO_NULL, /* perform_getsock */
+ ZERO_NULL, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_HTTP, /* defport */
+ CURLPROTO_HTTP, /* protocol */
+ PROTOPT_CREDSPERREQUEST /* flags */
+};
+
+#ifdef USE_SSL
+/*
+ * HTTPS handler interface.
+ */
+const struct Curl_handler Curl_handler_https = {
+ "HTTPS", /* scheme */
+ Curl_http_setup_conn, /* setup_connection */
+ Curl_http, /* do_it */
+ Curl_http_done, /* done */
+ ZERO_NULL, /* do_more */
+ Curl_http_connect, /* connect_it */
+ https_connecting, /* connecting */
+ ZERO_NULL, /* doing */
+ https_getsock, /* proto_getsock */
+ http_getsock_do, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ZERO_NULL, /* perform_getsock */
+ ZERO_NULL, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_HTTPS, /* defport */
+ CURLPROTO_HTTPS, /* protocol */
+ PROTOPT_SSL | PROTOPT_CREDSPERREQUEST /* flags */
+};
+#endif
+
+
+CURL_STATIC CURLcode Curl_http_setup_conn(struct connectdata *conn)
+{
+ /* allocate the HTTP-specific struct for the SessionHandle, only to survive
+ during this request */
+ DEBUGASSERT(conn->data->req.protop == NULL);
+
+ conn->data->req.protop = calloc(1, sizeof(struct HTTP));
+ if(!conn->data->req.protop)
+ return CURLE_OUT_OF_MEMORY;
+
+ return CURLE_OK;
+}
+
+/*
+ * checkheaders() checks the linked list of custom HTTP headers for a
+ * particular header (prefix).
+ *
+ * Returns a pointer to the first matching header or NULL if none matched.
+ */
+CURL_STATIC char *Curl_checkheaders(const struct connectdata *conn,
+ const char *thisheader)
+{
+ struct curl_slist *head;
+ size_t thislen = strlen(thisheader);
+ struct SessionHandle *data = conn->data;
+
+ for(head = data->set.headers;head; head=head->next) {
+ if(Curl_raw_nequal(head->data, thisheader, thislen))
+ return head->data;
+ }
+ return NULL;
+}
+
+/*
+ * checkProxyHeaders() checks the linked list of custom proxy headers
+ * if proxy headers are not available, then it will lookup into http header
+ * link list
+ *
+ * It takes a connectdata struct as input instead of the SessionHandle simply
+ * to know if this is a proxy request or not, as it then might check a
+ * different header list.
+ *
+ */
+CURL_STATIC char *Curl_checkProxyheaders(const struct connectdata *conn,
+ const char *thisheader)
+{
+ struct curl_slist *head;
+ size_t thislen = strlen(thisheader);
+ struct SessionHandle *data = conn->data;
+
+ for(head = (conn->bits.proxy && data->set.sep_headers)?
+ data->set.proxyheaders:data->set.headers;
+ head; head=head->next) {
+ if(Curl_raw_nequal(head->data, thisheader, thislen))
+ return head->data;
+ }
+ return NULL;
+}
+
+/*
+ * Strip off leading and trailing whitespace from the value in the
+ * given HTTP header line and return a strdupped copy. Returns NULL in
+ * case of allocation failure. Returns an empty string if the header value
+ * consists entirely of whitespace.
+ */
+CURL_STATIC char *Curl_copy_header_value(const char *header)
+{
+ const char *start;
+ const char *end;
+ char *value;
+ size_t len;
+
+ DEBUGASSERT(header);
+
+ /* Find the end of the header name */
+ while(*header && (*header != ':'))
+ ++header;
+
+ if(*header)
+ /* Skip over colon */
+ ++header;
+
+ /* Find the first non-space letter */
+ start = header;
+ while(*start && ISSPACE(*start))
+ start++;
+
+ /* data is in the host encoding so
+ use '\r' and '\n' instead of 0x0d and 0x0a */
+ end = strchr(start, '\r');
+ if(!end)
+ end = strchr(start, '\n');
+ if(!end)
+ end = strchr(start, '\0');
+ if(!end)
+ return NULL;
+
+ /* skip all trailing space letters */
+ while((end > start) && ISSPACE(*end))
+ end--;
+
+ /* get length of the type */
+ len = end - start + 1;
+
+ value = malloc(len + 1);
+ if(!value)
+ return NULL;
+
+ memcpy(value, start, len);
+ value[len] = 0; /* zero terminate */
+
+ return value;
+}
+
+/*
+ * http_output_basic() sets up an Authorization: header (or the proxy version)
+ * for HTTP Basic authentication.
+ *
+ * Returns CURLcode.
+ */
+static CURLcode http_output_basic(struct connectdata *conn, bool proxy)
+{
+ size_t size = 0;
+ char *authorization = NULL;
+ struct SessionHandle *data = conn->data;
+ char **userp;
+ const char *user;
+ const char *pwd;
+ CURLcode result;
+
+ if(proxy) {
+ userp = &conn->allocptr.proxyuserpwd;
+ user = conn->proxyuser;
+ pwd = conn->proxypasswd;
+ }
+ else {
+ userp = &conn->allocptr.userpwd;
+ user = conn->user;
+ pwd = conn->passwd;
+ }
+
+ snprintf(data->state.buffer, sizeof(data->state.buffer), "%s:%s", user, pwd);
+
+ result = Curl_base64_encode(data,
+ data->state.buffer, strlen(data->state.buffer),
+ &authorization, &size);
+ if(result)
+ return result;
+
+ if(!authorization)
+ return CURLE_REMOTE_ACCESS_DENIED;
+
+ free(*userp);
+ *userp = aprintf("%sAuthorization: Basic %s\r\n",
+ proxy?"Proxy-":"",
+ authorization);
+ free(authorization);
+ if(!*userp)
+ return CURLE_OUT_OF_MEMORY;
+
+ return CURLE_OK;
+}
+
+/* pickoneauth() selects the most favourable authentication method from the
+ * ones available and the ones we want.
+ *
+ * return TRUE if one was picked
+ */
+static bool pickoneauth(struct auth *pick)
+{
+ bool picked;
+ /* only deal with authentication we want */
+ unsigned long avail = pick->avail & pick->want;
+ picked = TRUE;
+
+ /* The order of these checks is highly relevant, as this will be the order
+ of preference in case of the existence of multiple accepted types. */
+ if(avail & CURLAUTH_NEGOTIATE)
+ pick->picked = CURLAUTH_NEGOTIATE;
+ else if(avail & CURLAUTH_DIGEST)
+ pick->picked = CURLAUTH_DIGEST;
+ else if(avail & CURLAUTH_NTLM)
+ pick->picked = CURLAUTH_NTLM;
+ else if(avail & CURLAUTH_NTLM_WB)
+ pick->picked = CURLAUTH_NTLM_WB;
+ else if(avail & CURLAUTH_BASIC)
+ pick->picked = CURLAUTH_BASIC;
+ else {
+ pick->picked = CURLAUTH_PICKNONE; /* we select to use nothing */
+ picked = FALSE;
+ }
+ pick->avail = CURLAUTH_NONE; /* clear it here */
+
+ return picked;
+}
+
+/*
+ * Curl_http_perhapsrewind()
+ *
+ * If we are doing POST or PUT {
+ * If we have more data to send {
+ * If we are doing NTLM {
+ * Keep sending since we must not disconnect
+ * }
+ * else {
+ * If there is more than just a little data left to send, close
+ * the current connection by force.
+ * }
+ * }
+ * If we have sent any data {
+ * If we don't have track of all the data {
+ * call app to tell it to rewind
+ * }
+ * else {
+ * rewind internally so that the operation can restart fine
+ * }
+ * }
+ * }
+ */
+static CURLcode http_perhapsrewind(struct connectdata *conn)
+{
+ struct SessionHandle *data = conn->data;
+ struct HTTP *http = data->req.protop;
+ curl_off_t bytessent;
+ curl_off_t expectsend = -1; /* default is unknown */
+
+ if(!http)
+ /* If this is still NULL, we have not reach very far and we can safely
+ skip this rewinding stuff */
+ return CURLE_OK;
+
+ switch(data->set.httpreq) {
+ case HTTPREQ_GET:
+ case HTTPREQ_HEAD:
+ return CURLE_OK;
+ default:
+ break;
+ }
+
+ bytessent = http->writebytecount;
+
+ if(conn->bits.authneg) {
+ /* This is a state where we are known to be negotiating and we don't send
+ any data then. */
+ expectsend = 0;
+ }
+ else if(!conn->bits.protoconnstart) {
+ /* HTTP CONNECT in progress: there is no body */
+ expectsend = 0;
+ }
+ else {
+ /* figure out how much data we are expected to send */
+ switch(data->set.httpreq) {
+ case HTTPREQ_POST:
+ if(data->set.postfieldsize != -1)
+ expectsend = data->set.postfieldsize;
+ else if(data->set.postfields)
+ expectsend = (curl_off_t)strlen(data->set.postfields);
+ break;
+ case HTTPREQ_PUT:
+ if(data->state.infilesize != -1)
+ expectsend = data->state.infilesize;
+ break;
+ case HTTPREQ_POST_FORM:
+ expectsend = http->postsize;
+ break;
+ default:
+ break;
+ }
+ }
+
+ conn->bits.rewindaftersend = FALSE; /* default */
+
+ if((expectsend == -1) || (expectsend > bytessent)) {
+#if defined(USE_NTLM)
+ /* There is still data left to send */
+ if((data->state.authproxy.picked == CURLAUTH_NTLM) ||
+ (data->state.authhost.picked == CURLAUTH_NTLM) ||
+ (data->state.authproxy.picked == CURLAUTH_NTLM_WB) ||
+ (data->state.authhost.picked == CURLAUTH_NTLM_WB)) {
+ if(((expectsend - bytessent) < 2000) ||
+ (conn->ntlm.state != NTLMSTATE_NONE) ||
+ (conn->proxyntlm.state != NTLMSTATE_NONE)) {
+ /* The NTLM-negotiation has started *OR* there is just a little (<2K)
+ data left to send, keep on sending. */
+
+ /* rewind data when completely done sending! */
+ if(!conn->bits.authneg) {
+ conn->bits.rewindaftersend = TRUE;
+ infof(data, "Rewind stream after send\n");
+ }
+
+ return CURLE_OK;
+ }
+
+ if(conn->bits.close)
+ /* this is already marked to get closed */
+ return CURLE_OK;
+
+ infof(data, "NTLM send, close instead of sending %"
+ CURL_FORMAT_CURL_OFF_T " bytes\n",
+ (curl_off_t)(expectsend - bytessent));
+ }
+#endif
+
+ /* This is not NTLM or many bytes left to send: close */
+ connclose(conn, "Mid-auth HTTP and much data left to send");
+ data->req.size = 0; /* don't download any more than 0 bytes */
+
+ /* There still is data left to send, but this connection is marked for
+ closure so we can safely do the rewind right now */
+ }
+
+ if(bytessent)
+ /* we rewind now at once since if we already sent something */
+ return Curl_readrewind(conn);
+
+ return CURLE_OK;
+}
+
+/*
+ * Curl_http_auth_act() gets called when all HTTP headers have been received
+ * and it checks what authentication methods that are available and decides
+ * which one (if any) to use. It will set 'newurl' if an auth method was
+ * picked.
+ */
+
+CURL_STATIC CURLcode Curl_http_auth_act(struct connectdata *conn)
+{
+ struct SessionHandle *data = conn->data;
+ bool pickhost = FALSE;
+ bool pickproxy = FALSE;
+ CURLcode result = CURLE_OK;
+
+ if(100 <= data->req.httpcode && 199 >= data->req.httpcode)
+ /* this is a transient response code, ignore */
+ return CURLE_OK;
+
+ if(data->state.authproblem)
+ return data->set.http_fail_on_error?CURLE_HTTP_RETURNED_ERROR:CURLE_OK;
+
+ if(conn->bits.user_passwd &&
+ ((data->req.httpcode == 401) ||
+ (conn->bits.authneg && data->req.httpcode < 300))) {
+ pickhost = pickoneauth(&data->state.authhost);
+ if(!pickhost)
+ data->state.authproblem = TRUE;
+ }
+ if(conn->bits.proxy_user_passwd &&
+ ((data->req.httpcode == 407) ||
+ (conn->bits.authneg && data->req.httpcode < 300))) {
+ pickproxy = pickoneauth(&data->state.authproxy);
+ if(!pickproxy)
+ data->state.authproblem = TRUE;
+ }
+
+ if(pickhost || pickproxy) {
+ /* In case this is GSS auth, the newurl field is already allocated so
+ we must make sure to free it before allocating a new one. As figured
+ out in bug #2284386 */
+ Curl_safefree(data->req.newurl);
+ data->req.newurl = strdup(data->change.url); /* clone URL */
+ if(!data->req.newurl)
+ return CURLE_OUT_OF_MEMORY;
+
+ if((data->set.httpreq != HTTPREQ_GET) &&
+ (data->set.httpreq != HTTPREQ_HEAD) &&
+ !conn->bits.rewindaftersend) {
+ result = http_perhapsrewind(conn);
+ if(result)
+ return result;
+ }
+ }
+
+ else if((data->req.httpcode < 300) &&
+ (!data->state.authhost.done) &&
+ conn->bits.authneg) {
+ /* no (known) authentication available,
+ authentication is not "done" yet and
+ no authentication seems to be required and
+ we didn't try HEAD or GET */
+ if((data->set.httpreq != HTTPREQ_GET) &&
+ (data->set.httpreq != HTTPREQ_HEAD)) {
+ data->req.newurl = strdup(data->change.url); /* clone URL */
+ if(!data->req.newurl)
+ return CURLE_OUT_OF_MEMORY;
+ data->state.authhost.done = TRUE;
+ }
+ }
+ if(http_should_fail(conn)) {
+ failf (data, "The requested URL returned error: %d",
+ data->req.httpcode);
+ result = CURLE_HTTP_RETURNED_ERROR;
+ }
+
+ return result;
+}
+
+
+/*
+ * Output the correct authentication header depending on the auth type
+ * and whether or not it is to a proxy.
+ */
+static CURLcode
+output_auth_headers(struct connectdata *conn,
+ struct auth *authstatus,
+ const char *request,
+ const char *path,
+ bool proxy)
+{
+ const char *auth = NULL;
+ CURLcode result = CURLE_OK;
+#if defined(USE_SPNEGO) || !defined(CURL_DISABLE_VERBOSE_STRINGS)
+ struct SessionHandle *data = conn->data;
+#endif
+#ifdef USE_SPNEGO
+ struct negotiatedata *negdata = proxy?
+ &data->state.proxyneg:&data->state.negotiate;
+#endif
+
+#ifdef CURL_DISABLE_CRYPTO_AUTH
+ (void)request;
+ (void)path;
+#endif
+
+#ifdef USE_SPNEGO
+ negdata->state = GSS_AUTHNONE;
+ if((authstatus->picked == CURLAUTH_NEGOTIATE) &&
+ negdata->context && !GSS_ERROR(negdata->status)) {
+ auth="Negotiate";
+ result = Curl_output_negotiate(conn, proxy);
+ if(result)
+ return result;
+ authstatus->done = TRUE;
+ negdata->state = GSS_AUTHSENT;
+ }
+ else
+#endif
+#ifdef USE_NTLM
+ if(authstatus->picked == CURLAUTH_NTLM) {
+ auth="NTLM";
+ result = Curl_output_ntlm(conn, proxy);
+ if(result)
+ return result;
+ }
+ else
+#endif
+#if defined(USE_NTLM) && defined(NTLM_WB_ENABLED)
+ if(authstatus->picked == CURLAUTH_NTLM_WB) {
+ auth="NTLM_WB";
+ result = Curl_output_ntlm_wb(conn, proxy);
+ if(result)
+ return result;
+ }
+ else
+#endif
+#ifndef CURL_DISABLE_CRYPTO_AUTH
+ if(authstatus->picked == CURLAUTH_DIGEST) {
+ auth="Digest";
+ result = Curl_output_digest(conn,
+ proxy,
+ (const unsigned char *)request,
+ (const unsigned char *)path);
+ if(result)
+ return result;
+ }
+ else
+#endif
+ if(authstatus->picked == CURLAUTH_BASIC) {
+ /* Basic */
+ if((proxy && conn->bits.proxy_user_passwd &&
+ !Curl_checkProxyheaders(conn, "Proxy-authorization:")) ||
+ (!proxy && conn->bits.user_passwd &&
+ !Curl_checkheaders(conn, "Authorization:"))) {
+ auth="Basic";
+ result = http_output_basic(conn, proxy);
+ if(result)
+ return result;
+ }
+ /* NOTE: this function should set 'done' TRUE, as the other auth
+ functions work that way */
+ authstatus->done = TRUE;
+ }
+
+ if(auth) {
+ infof(data, "%s auth using %s with user '%s'\n",
+ proxy?"Proxy":"Server", auth,
+ proxy?(conn->proxyuser?conn->proxyuser:""):
+ (conn->user?conn->user:""));
+ authstatus->multi = (!authstatus->done) ? TRUE : FALSE;
+ }
+ else
+ authstatus->multi = FALSE;
+
+ return CURLE_OK;
+}
+
+/**
+ * Curl_http_output_auth() setups the authentication headers for the
+ * host/proxy and the correct authentication
+ * method. conn->data->state.authdone is set to TRUE when authentication is
+ * done.
+ *
+ * @param conn all information about the current connection
+ * @param request pointer to the request keyword
+ * @param path pointer to the requested path
+ * @param proxytunnel boolean if this is the request setting up a "proxy
+ * tunnel"
+ *
+ * @returns CURLcode
+ */
+CURLcode
+Curl_http_output_auth(struct connectdata *conn,
+ const char *request,
+ const char *path,
+ bool proxytunnel) /* TRUE if this is the request setting
+ up the proxy tunnel */
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct auth *authhost;
+ struct auth *authproxy;
+
+ DEBUGASSERT(data);
+
+ authhost = &data->state.authhost;
+ authproxy = &data->state.authproxy;
+
+ if((conn->bits.httpproxy && conn->bits.proxy_user_passwd) ||
+ conn->bits.user_passwd)
+ /* continue please */;
+ else {
+ authhost->done = TRUE;
+ authproxy->done = TRUE;
+ return CURLE_OK; /* no authentication with no user or password */
+ }
+
+ if(authhost->want && !authhost->picked)
+ /* The app has selected one or more methods, but none has been picked
+ so far by a server round-trip. Then we set the picked one to the
+ want one, and if this is one single bit it'll be used instantly. */
+ authhost->picked = authhost->want;
+
+ if(authproxy->want && !authproxy->picked)
+ /* The app has selected one or more methods, but none has been picked so
+ far by a proxy round-trip. Then we set the picked one to the want one,
+ and if this is one single bit it'll be used instantly. */
+ authproxy->picked = authproxy->want;
+
+#ifndef CURL_DISABLE_PROXY
+ /* Send proxy authentication header if needed */
+ if(conn->bits.httpproxy &&
+ (conn->bits.tunnel_proxy == proxytunnel)) {
+ result = output_auth_headers(conn, authproxy, request, path, TRUE);
+ if(result)
+ return result;
+ }
+ else
+#else
+ (void)proxytunnel;
+#endif /* CURL_DISABLE_PROXY */
+ /* we have no proxy so let's pretend we're done authenticating
+ with it */
+ authproxy->done = TRUE;
+
+ /* To prevent the user+password to get sent to other than the original
+ host due to a location-follow, we do some weirdo checks here */
+ if(!data->state.this_is_a_follow ||
+ conn->bits.netrc ||
+ !data->state.first_host ||
+ data->set.http_disable_hostname_check_before_authentication ||
+ Curl_raw_equal(data->state.first_host, conn->host.name)) {
+ result = output_auth_headers(conn, authhost, request, path, FALSE);
+ }
+ else
+ authhost->done = TRUE;
+
+ return result;
+}
+
+
+/*
+ * Curl_http_input_auth() deals with Proxy-Authenticate: and WWW-Authenticate:
+ * headers. They are dealt with both in the transfer.c main loop and in the
+ * proxy CONNECT loop.
+ */
+
+CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy,
+ const char *auth) /* the first non-space */
+{
+ /*
+ * This resource requires authentication
+ */
+ struct SessionHandle *data = conn->data;
+
+#ifdef USE_SPNEGO
+ struct negotiatedata *negdata = proxy?
+ &data->state.proxyneg:&data->state.negotiate;
+#endif
+ unsigned long *availp;
+ struct auth *authp;
+
+ if(proxy) {
+ availp = &data->info.proxyauthavail;
+ authp = &data->state.authproxy;
+ }
+ else {
+ availp = &data->info.httpauthavail;
+ authp = &data->state.authhost;
+ }
+
+ /*
+ * Here we check if we want the specific single authentication (using ==) and
+ * if we do, we initiate usage of it.
+ *
+ * If the provided authentication is wanted as one out of several accepted
+ * types (using &), we OR this authentication type to the authavail
+ * variable.
+ *
+ * Note:
+ *
+ * ->picked is first set to the 'want' value (one or more bits) before the
+ * request is sent, and then it is again set _after_ all response 401/407
+ * headers have been received but then only to a single preferred method
+ * (bit).
+ *
+ */
+
+ while(*auth) {
+#ifdef USE_SPNEGO
+ if(checkprefix("Negotiate", auth)) {
+ *availp |= CURLAUTH_NEGOTIATE;
+ authp->avail |= CURLAUTH_NEGOTIATE;
+
+ if(authp->picked == CURLAUTH_NEGOTIATE) {
+ if(negdata->state == GSS_AUTHSENT || negdata->state == GSS_AUTHNONE) {
+ CURLcode result = Curl_input_negotiate(conn, proxy, auth);
+ if(!result) {
+ DEBUGASSERT(!data->req.newurl);
+ data->req.newurl = strdup(data->change.url);
+ if(!data->req.newurl)
+ return CURLE_OUT_OF_MEMORY;
+ data->state.authproblem = FALSE;
+ /* we received a GSS auth token and we dealt with it fine */
+ negdata->state = GSS_AUTHRECV;
+ }
+ else
+ data->state.authproblem = TRUE;
+ }
+ }
+ }
+ else
+#endif
+#ifdef USE_NTLM
+ /* NTLM support requires the SSL crypto libs */
+ if(checkprefix("NTLM", auth)) {
+ *availp |= CURLAUTH_NTLM;
+ authp->avail |= CURLAUTH_NTLM;
+ if(authp->picked == CURLAUTH_NTLM ||
+ authp->picked == CURLAUTH_NTLM_WB) {
+ /* NTLM authentication is picked and activated */
+ CURLcode result = Curl_input_ntlm(conn, proxy, auth);
+ if(!result) {
+ data->state.authproblem = FALSE;
+#ifdef NTLM_WB_ENABLED
+ if(authp->picked == CURLAUTH_NTLM_WB) {
+ *availp &= ~CURLAUTH_NTLM;
+ authp->avail &= ~CURLAUTH_NTLM;
+ *availp |= CURLAUTH_NTLM_WB;
+ authp->avail |= CURLAUTH_NTLM_WB;
+
+ /* Get the challenge-message which will be passed to
+ * ntlm_auth for generating the type 3 message later */
+ while(*auth && ISSPACE(*auth))
+ auth++;
+ if(checkprefix("NTLM", auth)) {
+ auth += strlen("NTLM");
+ while(*auth && ISSPACE(*auth))
+ auth++;
+ if(*auth)
+ if((conn->challenge_header = strdup(auth)) == NULL)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ }
+#endif
+ }
+ else {
+ infof(data, "Authentication problem. Ignoring this.\n");
+ data->state.authproblem = TRUE;
+ }
+ }
+ }
+ else
+#endif
+#ifndef CURL_DISABLE_CRYPTO_AUTH
+ if(checkprefix("Digest", auth)) {
+ if((authp->avail & CURLAUTH_DIGEST) != 0) {
+ infof(data, "Ignoring duplicate digest auth header.\n");
+ }
+ else {
+ CURLcode result;
+ *availp |= CURLAUTH_DIGEST;
+ authp->avail |= CURLAUTH_DIGEST;
+
+ /* We call this function on input Digest headers even if Digest
+ * authentication isn't activated yet, as we need to store the
+ * incoming data from this header in case we are gonna use
+ * Digest. */
+ result = Curl_input_digest(conn, proxy, auth);
+ if(result) {
+ infof(data, "Authentication problem. Ignoring this.\n");
+ data->state.authproblem = TRUE;
+ }
+ }
+ }
+ else
+#endif
+ if(checkprefix("Basic", auth)) {
+ *availp |= CURLAUTH_BASIC;
+ authp->avail |= CURLAUTH_BASIC;
+ if(authp->picked == CURLAUTH_BASIC) {
+ /* We asked for Basic authentication but got a 40X back
+ anyway, which basically means our name+password isn't
+ valid. */
+ authp->avail = CURLAUTH_NONE;
+ infof(data, "Authentication problem. Ignoring this.\n");
+ data->state.authproblem = TRUE;
+ }
+ }
+
+ /* there may be multiple methods on one line, so keep reading */
+ while(*auth && *auth != ',') /* read up to the next comma */
+ auth++;
+ if(*auth == ',') /* if we're on a comma, skip it */
+ auth++;
+ while(*auth && ISSPACE(*auth))
+ auth++;
+ }
+ return CURLE_OK;
+}
+
+/**
+ * http_should_fail() determines whether an HTTP response has gotten us
+ * into an error state or not.
+ *
+ * @param conn all information about the current connection
+ *
+ * @retval 0 communications should continue
+ *
+ * @retval 1 communications should not continue
+ */
+static int http_should_fail(struct connectdata *conn)
+{
+ struct SessionHandle *data;
+ int httpcode;
+
+ DEBUGASSERT(conn);
+ data = conn->data;
+ DEBUGASSERT(data);
+
+ httpcode = data->req.httpcode;
+
+ /*
+ ** If we haven't been asked to fail on error,
+ ** don't fail.
+ */
+ if(!data->set.http_fail_on_error)
+ return 0;
+
+ /*
+ ** Any code < 400 is never terminal.
+ */
+ if(httpcode < 400)
+ return 0;
+
+ /*
+ ** Any code >= 400 that's not 401 or 407 is always
+ ** a terminal error
+ */
+ if((httpcode != 401) &&
+ (httpcode != 407))
+ return 1;
+
+ /*
+ ** All we have left to deal with is 401 and 407
+ */
+ DEBUGASSERT((httpcode == 401) || (httpcode == 407));
+
+ /*
+ ** Examine the current authentication state to see if this
+ ** is an error. The idea is for this function to get
+ ** called after processing all the headers in a response
+ ** message. So, if we've been to asked to authenticate a
+ ** particular stage, and we've done it, we're OK. But, if
+ ** we're already completely authenticated, it's not OK to
+ ** get another 401 or 407.
+ **
+ ** It is possible for authentication to go stale such that
+ ** the client needs to reauthenticate. Once that info is
+ ** available, use it here.
+ */
+
+ /*
+ ** Either we're not authenticating, or we're supposed to
+ ** be authenticating something else. This is an error.
+ */
+ if((httpcode == 401) && !conn->bits.user_passwd)
+ return TRUE;
+ if((httpcode == 407) && !conn->bits.proxy_user_passwd)
+ return TRUE;
+
+ return data->state.authproblem;
+}
+
+/*
+ * readmoredata() is a "fread() emulation" to provide POST and/or request
+ * data. It is used when a huge POST is to be made and the entire chunk wasn't
+ * sent in the first send(). This function will then be called from the
+ * transfer.c loop when more data is to be sent to the peer.
+ *
+ * Returns the amount of bytes it filled the buffer with.
+ */
+static size_t readmoredata(char *buffer,
+ size_t size,
+ size_t nitems,
+ void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ struct HTTP *http = conn->data->req.protop;
+ size_t fullsize = size * nitems;
+
+ if(0 == http->postsize)
+ /* nothing to return */
+ return 0;
+
+ /* make sure that a HTTP request is never sent away chunked! */
+ conn->data->req.forbidchunk = (http->sending == HTTPSEND_REQUEST)?TRUE:FALSE;
+
+ if(http->postsize <= (curl_off_t)fullsize) {
+ memcpy(buffer, http->postdata, (size_t)http->postsize);
+ fullsize = (size_t)http->postsize;
+
+ if(http->backup.postsize) {
+ /* move backup data into focus and continue on that */
+ http->postdata = http->backup.postdata;
+ http->postsize = http->backup.postsize;
+ conn->fread_func = http->backup.fread_func;
+ conn->fread_in = http->backup.fread_in;
+
+ http->sending++; /* move one step up */
+
+ http->backup.postsize=0;
+ }
+ else
+ http->postsize = 0;
+
+ return fullsize;
+ }
+
+ memcpy(buffer, http->postdata, fullsize);
+ http->postdata += fullsize;
+ http->postsize -= fullsize;
+
+ return fullsize;
+}
+
+/* ------------------------------------------------------------------------- */
+/* add_buffer functions */
+
+/*
+ * Curl_add_buffer_init() sets up and returns a fine buffer struct
+ */
+CURL_STATIC Curl_send_buffer *Curl_add_buffer_init(void)
+{
+ return calloc(1, sizeof(Curl_send_buffer));
+}
+
+/*
+ * Curl_add_buffer_send() sends a header buffer and frees all associated
+ * memory. Body data may be appended to the header data if desired.
+ *
+ * Returns CURLcode
+ */
+CURL_STATIC CURLcode Curl_add_buffer_send(Curl_send_buffer *in,
+ struct connectdata *conn,
+
+ /* add the number of sent bytes to this
+ counter */
+ long *bytes_written,
+
+ /* how much of the buffer contains body data */
+ size_t included_body_bytes,
+ int socketindex)
+
+{
+ ssize_t amount;
+ CURLcode result;
+ char *ptr;
+ size_t size;
+ struct HTTP *http = conn->data->req.protop;
+ size_t sendsize;
+ curl_socket_t sockfd;
+ size_t headersize;
+
+ DEBUGASSERT(socketindex <= SECONDARYSOCKET);
+
+ sockfd = conn->sock[socketindex];
+
+ /* The looping below is required since we use non-blocking sockets, but due
+ to the circumstances we will just loop and try again and again etc */
+
+ ptr = in->buffer;
+ size = in->size_used;
+
+ headersize = size - included_body_bytes; /* the initial part that isn't body
+ is header */
+
+ DEBUGASSERT(size > included_body_bytes);
+
+ result = Curl_convert_to_network(conn->data, ptr, headersize);
+ /* Curl_convert_to_network calls failf if unsuccessful */
+ if(result) {
+ /* conversion failed, free memory and return to the caller */
+ free(in->buffer);
+ free(in);
+ return result;
+ }
+
+
+ if(conn->handler->flags & PROTOPT_SSL) {
+ /* We never send more than CURL_MAX_WRITE_SIZE bytes in one single chunk
+ when we speak HTTPS, as if only a fraction of it is sent now, this data
+ needs to fit into the normal read-callback buffer later on and that
+ buffer is using this size.
+ */
+
+ sendsize= (size > CURL_MAX_WRITE_SIZE)?CURL_MAX_WRITE_SIZE:size;
+
+ /* OpenSSL is very picky and we must send the SAME buffer pointer to the
+ library when we attempt to re-send this buffer. Sending the same data
+ is not enough, we must use the exact same address. For this reason, we
+ must copy the data to the uploadbuffer first, since that is the buffer
+ we will be using if this send is retried later.
+ */
+ memcpy(conn->data->state.uploadbuffer, ptr, sendsize);
+ ptr = conn->data->state.uploadbuffer;
+ }
+ else
+ sendsize = size;
+
+ result = Curl_write(conn, sockfd, ptr, sendsize, &amount);
+
+ if(!result) {
+ /*
+ * Note that we may not send the entire chunk at once, and we have a set
+ * number of data bytes at the end of the big buffer (out of which we may
+ * only send away a part).
+ */
+ /* how much of the header that was sent */
+ size_t headlen = (size_t)amount>headersize?headersize:(size_t)amount;
+ size_t bodylen = amount - headlen;
+
+ if(conn->data->set.verbose) {
+ /* this data _may_ contain binary stuff */
+ Curl_debug(conn->data, CURLINFO_HEADER_OUT, ptr, headlen, conn);
+ if(bodylen) {
+ /* there was body data sent beyond the initial header part, pass that
+ on to the debug callback too */
+ Curl_debug(conn->data, CURLINFO_DATA_OUT,
+ ptr+headlen, bodylen, conn);
+ }
+ }
+ if(bodylen)
+ /* since we sent a piece of the body here, up the byte counter for it
+ accordingly */
+ http->writebytecount += bodylen;
+
+ /* 'amount' can never be a very large value here so typecasting it so a
+ signed 31 bit value should not cause problems even if ssize_t is
+ 64bit */
+ *bytes_written += (long)amount;
+
+ if(http) {
+ if((size_t)amount != size) {
+ /* The whole request could not be sent in one system call. We must
+ queue it up and send it later when we get the chance. We must not
+ loop here and wait until it might work again. */
+
+ size -= amount;
+
+ ptr = in->buffer + amount;
+
+ /* backup the currently set pointers */
+ http->backup.fread_func = conn->fread_func;
+ http->backup.fread_in = conn->fread_in;
+ http->backup.postdata = http->postdata;
+ http->backup.postsize = http->postsize;
+
+ /* set the new pointers for the request-sending */
+ conn->fread_func = (curl_read_callback)readmoredata;
+ conn->fread_in = (void *)conn;
+ http->postdata = ptr;
+ http->postsize = (curl_off_t)size;
+
+ http->send_buffer = in;
+ http->sending = HTTPSEND_REQUEST;
+
+ return CURLE_OK;
+ }
+ http->sending = HTTPSEND_BODY;
+ /* the full buffer was sent, clean up and return */
+ }
+ else {
+ if((size_t)amount != size)
+ /* We have no continue-send mechanism now, fail. This can only happen
+ when this function is used from the CONNECT sending function. We
+ currently (stupidly) assume that the whole request is always sent
+ away in the first single chunk.
+
+ This needs FIXing.
+ */
+ return CURLE_SEND_ERROR;
+ else
+ conn->writechannel_inuse = FALSE;
+ }
+ }
+ free(in->buffer);
+ free(in);
+
+ return result;
+}
+
+
+/*
+ * add_bufferf() add the formatted input to the buffer.
+ */
+CURL_STATIC CURLcode Curl_add_bufferf(Curl_send_buffer *in, const char *fmt, ...)
+{
+ char *s;
+ va_list ap;
+ va_start(ap, fmt);
+ s = vaprintf(fmt, ap); /* this allocs a new string to append */
+ va_end(ap);
+
+ if(s) {
+ CURLcode result = Curl_add_buffer(in, s, strlen(s));
+ free(s);
+ return result;
+ }
+ /* If we failed, we cleanup the whole buffer and return error */
+ free(in->buffer);
+ free(in);
+ return CURLE_OUT_OF_MEMORY;
+}
+
+/*
+ * add_buffer() appends a memory chunk to the existing buffer
+ */
+CURL_STATIC CURLcode Curl_add_buffer(Curl_send_buffer *in, const void *inptr, size_t size)
+{
+ char *new_rb;
+ size_t new_size;
+
+ if(~size < in->size_used) {
+ /* If resulting used size of send buffer would wrap size_t, cleanup
+ the whole buffer and return error. Otherwise the required buffer
+ size will fit into a single allocatable memory chunk */
+ Curl_safefree(in->buffer);
+ free(in);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ if(!in->buffer ||
+ ((in->size_used + size) > (in->size_max - 1))) {
+
+ /* If current buffer size isn't enough to hold the result, use a
+ buffer size that doubles the required size. If this new size
+ would wrap size_t, then just use the largest possible one */
+
+ if((size > (size_t)-1/2) || (in->size_used > (size_t)-1/2) ||
+ (~(size*2) < (in->size_used*2)))
+ new_size = (size_t)-1;
+ else
+ new_size = (in->size_used+size)*2;
+
+ if(in->buffer)
+ /* we have a buffer, enlarge the existing one */
+ new_rb = realloc(in->buffer, new_size);
+ else
+ /* create a new buffer */
+ new_rb = malloc(new_size);
+
+ if(!new_rb) {
+ /* If we failed, we cleanup the whole buffer and return error */
+ Curl_safefree(in->buffer);
+ free(in);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ in->buffer = new_rb;
+ in->size_max = new_size;
+ }
+ memcpy(&in->buffer[in->size_used], inptr, size);
+
+ in->size_used += size;
+
+ return CURLE_OK;
+}
+
+/* end of the add_buffer functions */
+/* ------------------------------------------------------------------------- */
+
+
+
+/*
+ * Curl_compareheader()
+ *
+ * Returns TRUE if 'headerline' contains the 'header' with given 'content'.
+ * Pass headers WITH the colon.
+ */
+bool
+Curl_compareheader(const char *headerline, /* line to check */
+ const char *header, /* header keyword _with_ colon */
+ const char *content) /* content string to find */
+{
+ /* RFC2616, section 4.2 says: "Each header field consists of a name followed
+ * by a colon (":") and the field value. Field names are case-insensitive.
+ * The field value MAY be preceded by any amount of LWS, though a single SP
+ * is preferred." */
+
+ size_t hlen = strlen(header);
+ size_t clen;
+ size_t len;
+ const char *start;
+ const char *end;
+
+ if(!Curl_raw_nequal(headerline, header, hlen))
+ return FALSE; /* doesn't start with header */
+
+ /* pass the header */
+ start = &headerline[hlen];
+
+ /* pass all white spaces */
+ while(*start && ISSPACE(*start))
+ start++;
+
+ /* find the end of the header line */
+ end = strchr(start, '\r'); /* lines end with CRLF */
+ if(!end) {
+ /* in case there's a non-standard compliant line here */
+ end = strchr(start, '\n');
+
+ if(!end)
+ /* hm, there's no line ending here, use the zero byte! */
+ end = strchr(start, '\0');
+ }
+
+ len = end-start; /* length of the content part of the input line */
+ clen = strlen(content); /* length of the word to find */
+
+ /* find the content string in the rest of the line */
+ for(;len>=clen;len--, start++) {
+ if(Curl_raw_nequal(start, content, clen))
+ return TRUE; /* match! */
+ }
+
+ return FALSE; /* no match */
+}
+
+/*
+ * Curl_http_connect() performs HTTP stuff to do at connect-time, called from
+ * the generic Curl_connect().
+ */
+CURL_STATIC CURLcode Curl_http_connect(struct connectdata *conn, bool *done)
+{
+ CURLcode result;
+
+ /* We default to persistent connections. We set this already in this connect
+ function to make the re-use checks properly be able to check this bit. */
+ connkeep(conn, "HTTP default");
+
+ /* the CONNECT procedure might not have been completed */
+ result = Curl_proxy_connect(conn);
+ if(result)
+ return result;
+
+ if(conn->tunnel_state[FIRSTSOCKET] == TUNNEL_CONNECT)
+ /* nothing else to do except wait right now - we're not done here. */
+ return CURLE_OK;
+
+ if(conn->given->flags & PROTOPT_SSL) {
+ /* perform SSL initialization */
+ result = https_connecting(conn, done);
+ if(result)
+ return result;
+ }
+ else
+ *done = TRUE;
+
+ return CURLE_OK;
+}
+
+/* this returns the socket to wait for in the DO and DOING state for the multi
+ interface and then we're always _sending_ a request and thus we wait for
+ the single socket to become writable only */
+static int http_getsock_do(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks)
+{
+ /* write mode */
+ (void)numsocks; /* unused, we trust it to be at least 1 */
+ socks[0] = conn->sock[FIRSTSOCKET];
+ return GETSOCK_WRITESOCK(0);
+}
+
+#ifdef USE_SSL
+static CURLcode https_connecting(struct connectdata *conn, bool *done)
+{
+ CURLcode result;
+ DEBUGASSERT((conn) && (conn->handler->flags & PROTOPT_SSL));
+
+ /* perform SSL initialization for this socket */
+ result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, done);
+ if(result)
+ connclose(conn, "Failed HTTPS connection");
+
+ return result;
+}
+#endif
+
+#if defined(USE_OPENSSL) || defined(USE_GNUTLS) || defined(USE_SCHANNEL) || \
+ defined(USE_DARWINSSL) || defined(USE_POLARSSL) || defined(USE_NSS)
+/* This function is for OpenSSL, GnuTLS, darwinssl, schannel and polarssl only.
+ It should be made to query the generic SSL layer instead. */
+static int https_getsock(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks)
+{
+ if(conn->handler->flags & PROTOPT_SSL) {
+ struct ssl_connect_data *connssl = &conn->ssl[FIRSTSOCKET];
+
+ if(!numsocks)
+ return GETSOCK_BLANK;
+
+ if(connssl->connecting_state == ssl_connect_2_writing) {
+ /* write mode */
+ socks[0] = conn->sock[FIRSTSOCKET];
+ return GETSOCK_WRITESOCK(0);
+ }
+ else if(connssl->connecting_state == ssl_connect_2_reading) {
+ /* read mode */
+ socks[0] = conn->sock[FIRSTSOCKET];
+ return GETSOCK_READSOCK(0);
+ }
+ }
+ return CURLE_OK;
+}
+#else
+#ifdef USE_SSL
+static int https_getsock(struct connectdata *conn,
+ curl_socket_t *socks,
+ int numsocks)
+{
+ (void)conn;
+ (void)socks;
+ (void)numsocks;
+ return GETSOCK_BLANK;
+}
+#endif /* USE_SSL */
+#endif /* USE_OPENSSL || USE_GNUTLS || USE_SCHANNEL */
+
+/*
+ * Curl_http_done() gets called from Curl_done() after a single HTTP request
+ * has been performed.
+ */
+
+CURL_STATIC CURLcode Curl_http_done(struct connectdata *conn,
+ CURLcode status, bool premature)
+{
+ struct SessionHandle *data = conn->data;
+ struct HTTP *http =data->req.protop;
+
+ Curl_unencode_cleanup(conn);
+
+#ifdef USE_SPNEGO
+ if(data->state.proxyneg.state == GSS_AUTHSENT ||
+ data->state.negotiate.state == GSS_AUTHSENT) {
+ /* add forbid re-use if http-code != 401/407 as a WA only needed for
+ * 401/407 that signal auth failure (empty) otherwise state will be RECV
+ * with current code */
+ if((data->req.httpcode != 401) && (data->req.httpcode != 407))
+ connclose(conn, "Negotiate transfer completed");
+ Curl_cleanup_negotiate(data);
+ }
+#endif
+
+ /* set the proper values (possibly modified on POST) */
+ conn->fread_func = data->set.fread_func; /* restore */
+ conn->fread_in = data->set.in; /* restore */
+ conn->seek_func = data->set.seek_func; /* restore */
+ conn->seek_client = data->set.seek_client; /* restore */
+
+ if(http == NULL)
+ return CURLE_OK;
+
+ if(http->send_buffer) {
+ Curl_send_buffer *buff = http->send_buffer;
+
+ free(buff->buffer);
+ free(buff);
+ http->send_buffer = NULL; /* clear the pointer */
+ }
+
+ if(HTTPREQ_POST_FORM == data->set.httpreq) {
+ data->req.bytecount = http->readbytecount + http->writebytecount;
+
+ Curl_formclean(&http->sendit); /* Now free that whole lot */
+ if(http->form.fp) {
+ /* a file being uploaded was left opened, close it! */
+ fclose(http->form.fp);
+ http->form.fp = NULL;
+ }
+ }
+ else if(HTTPREQ_PUT == data->set.httpreq)
+ data->req.bytecount = http->readbytecount + http->writebytecount;
+
+ if(status)
+ return status;
+
+ if(!premature && /* this check is pointless when DONE is called before the
+ entire operation is complete */
+ !conn->bits.retry &&
+ !data->set.connect_only &&
+ ((http->readbytecount +
+ data->req.headerbytecount -
+ data->req.deductheadercount)) <= 0) {
+ /* If this connection isn't simply closed to be retried, AND nothing was
+ read from the HTTP server (that counts), this can't be right so we
+ return an error here */
+ failf(data, "Empty reply from server");
+ return CURLE_GOT_NOTHING;
+ }
+
+ return CURLE_OK;
+}
+
+
+/*
+ * Determine if we should use HTTP 1.1 (OR BETTER) for this request. Reasons
+ * to avoid it include:
+ *
+ * - if the user specifically requested HTTP 1.0
+ * - if the server we are connected to only supports 1.0
+ * - if any server previously contacted to handle this request only supports
+ * 1.0.
+ */
+static bool use_http_1_1plus(const struct SessionHandle *data,
+ const struct connectdata *conn)
+{
+ return ((data->set.httpversion >= CURL_HTTP_VERSION_1_1) ||
+ ((data->set.httpversion != CURL_HTTP_VERSION_1_0) &&
+ ((conn->httpversion == 11) ||
+ ((conn->httpversion != 10) &&
+ (data->state.httpversion != 10))))) ? TRUE : FALSE;
+}
+
+/* check and possibly add an Expect: header */
+static CURLcode expect100(struct SessionHandle *data,
+ struct connectdata *conn,
+ Curl_send_buffer *req_buffer)
+{
+ CURLcode result = CURLE_OK;
+ const char *ptr;
+ data->state.expect100header = FALSE; /* default to false unless it is set
+ to TRUE below */
+ if(use_http_1_1plus(data, conn) &&
+ (conn->httpversion != 20)) {
+ /* if not doing HTTP 1.0 or version 2, or disabled explicitly, we add an
+ Expect: 100-continue to the headers which actually speeds up post
+ operations (as there is one packet coming back from the web server) */
+ ptr = Curl_checkheaders(conn, "Expect:");
+ if(ptr) {
+ data->state.expect100header =
+ Curl_compareheader(ptr, "Expect:", "100-continue");
+ }
+ else {
+ result = Curl_add_bufferf(req_buffer,
+ "Expect: 100-continue\r\n");
+ if(!result)
+ data->state.expect100header = TRUE;
+ }
+ }
+ return result;
+}
+
+enum proxy_use {
+ HEADER_SERVER, /* direct to server */
+ HEADER_PROXY, /* regular request to proxy */
+ HEADER_CONNECT /* sending CONNECT to a proxy */
+};
+
+CURL_STATIC CURLcode Curl_add_custom_headers(struct connectdata *conn,
+ bool is_connect,
+ Curl_send_buffer *req_buffer)
+{
+ char *ptr;
+ struct curl_slist *h[2];
+ struct curl_slist *headers;
+ int numlists=1; /* by default */
+ struct SessionHandle *data = conn->data;
+ int i;
+
+ enum proxy_use proxy;
+
+ if(is_connect)
+ proxy = HEADER_CONNECT;
+ else
+ proxy = conn->bits.httpproxy && !conn->bits.tunnel_proxy?
+ HEADER_PROXY:HEADER_SERVER;
+
+ switch(proxy) {
+ case HEADER_SERVER:
+ h[0] = data->set.headers;
+ break;
+ case HEADER_PROXY:
+ h[0] = data->set.headers;
+ if(data->set.sep_headers) {
+ h[1] = data->set.proxyheaders;
+ numlists++;
+ }
+ break;
+ case HEADER_CONNECT:
+ if(data->set.sep_headers)
+ h[0] = data->set.proxyheaders;
+ else
+ h[0] = data->set.headers;
+ break;
+ }
+
+ /* loop through one or two lists */
+ for(i=0; i < numlists; i++) {
+ headers = h[i];
+
+ while(headers) {
+ ptr = strchr(headers->data, ':');
+ if(ptr) {
+ /* we require a colon for this to be a true header */
+
+ ptr++; /* pass the colon */
+ while(*ptr && ISSPACE(*ptr))
+ ptr++;
+
+ if(*ptr) {
+ /* only send this if the contents was non-blank */
+
+ if(conn->allocptr.host &&
+ /* a Host: header was sent already, don't pass on any custom Host:
+ header as that will produce *two* in the same request! */
+ checkprefix("Host:", headers->data))
+ ;
+ else if(data->set.httpreq == HTTPREQ_POST_FORM &&
+ /* this header (extended by formdata.c) is sent later */
+ checkprefix("Content-Type:", headers->data))
+ ;
+ else if(conn->bits.authneg &&
+ /* while doing auth neg, don't allow the custom length since
+ we will force length zero then */
+ checkprefix("Content-Length", headers->data))
+ ;
+ else if(conn->allocptr.te &&
+ /* when asking for Transfer-Encoding, don't pass on a custom
+ Connection: */
+ checkprefix("Connection", headers->data))
+ ;
+ else {
+ CURLcode result = Curl_add_bufferf(req_buffer, "%s\r\n",
+ headers->data);
+ if(result)
+ return result;
+ }
+ }
+ }
+ else {
+ ptr = strchr(headers->data, ';');
+ if(ptr) {
+
+ ptr++; /* pass the semicolon */
+ while(*ptr && ISSPACE(*ptr))
+ ptr++;
+
+ if(*ptr) {
+ /* this may be used for something else in the future */
+ }
+ else {
+ if(*(--ptr) == ';') {
+ CURLcode result;
+
+ /* send no-value custom header if terminated by semicolon */
+ *ptr = ':';
+ result = Curl_add_bufferf(req_buffer, "%s\r\n",
+ headers->data);
+ if(result)
+ return result;
+ }
+ }
+ }
+ }
+ headers = headers->next;
+ }
+ }
+ return CURLE_OK;
+}
+
+CURL_STATIC CURLcode Curl_add_timecondition(struct SessionHandle *data,
+ Curl_send_buffer *req_buffer)
+{
+ const struct tm *tm;
+ char *buf = data->state.buffer;
+ struct tm keeptime;
+ CURLcode result = Curl_gmtime(data->set.timevalue, &keeptime);
+ if(result) {
+ failf(data, "Invalid TIMEVALUE");
+ return result;
+ }
+ tm = &keeptime;
+
+ /* The If-Modified-Since header family should have their times set in
+ * GMT as RFC2616 defines: "All HTTP date/time stamps MUST be
+ * represented in Greenwich Mean Time (GMT), without exception. For the
+ * purposes of HTTP, GMT is exactly equal to UTC (Coordinated Universal
+ * Time)." (see page 20 of RFC2616).
+ */
+
+ /* format: "Tue, 15 Nov 1994 12:45:26 GMT" */
+ snprintf(buf, BUFSIZE-1,
+ "%s, %02d %s %4d %02d:%02d:%02d GMT",
+ Curl_wkday[tm->tm_wday?tm->tm_wday-1:6],
+ tm->tm_mday,
+ Curl_month[tm->tm_mon],
+ tm->tm_year + 1900,
+ tm->tm_hour,
+ tm->tm_min,
+ tm->tm_sec);
+
+ switch(data->set.timecondition) {
+ case CURL_TIMECOND_IFMODSINCE:
+ default:
+ result = Curl_add_bufferf(req_buffer,
+ "If-Modified-Since: %s\r\n", buf);
+ break;
+ case CURL_TIMECOND_IFUNMODSINCE:
+ result = Curl_add_bufferf(req_buffer,
+ "If-Unmodified-Since: %s\r\n", buf);
+ break;
+ case CURL_TIMECOND_LASTMOD:
+ result = Curl_add_bufferf(req_buffer,
+ "Last-Modified: %s\r\n", buf);
+ break;
+ }
+
+ return result;
+}
+
+/*
+ * Curl_http() gets called from the generic Curl_do() function when a HTTP
+ * request is to be performed. This creates and sends a properly constructed
+ * HTTP request.
+ */
+CURL_STATIC CURLcode Curl_http(struct connectdata *conn, bool *done)
+{
+ struct SessionHandle *data = conn->data;
+ CURLcode result = CURLE_OK;
+ struct HTTP *http;
+ const char *ppath = data->state.path;
+ bool paste_ftp_userpwd = FALSE;
+ char ftp_typecode[sizeof("/;type=?")] = "";
+ const char *host = conn->host.name;
+ const char *te = ""; /* transfer-encoding */
+ const char *ptr;
+ const char *request;
+ Curl_HttpReq httpreq = data->set.httpreq;
+#if !defined(CURL_DISABLE_COOKIES)
+ char *addcookies = NULL;
+#endif
+ curl_off_t included_body = 0;
+ const char *httpstring;
+ Curl_send_buffer *req_buffer;
+ curl_off_t postsize = 0; /* curl_off_t to handle large file sizes */
+ int seekerr = CURL_SEEKFUNC_OK;
+
+ /* Always consider the DO phase done after this function call, even if there
+ may be parts of the request that is not yet sent, since we can deal with
+ the rest of the request in the PERFORM phase. */
+ *done = TRUE;
+
+ if(conn->httpversion < 20) { /* unless the connection is re-used and already
+ http2 */
+ switch(conn->negnpn) {
+ case CURL_HTTP_VERSION_2_0:
+ conn->httpversion = 20; /* we know we're on HTTP/2 now */
+ result = Curl_http2_init(conn);
+ if(result)
+ return result;
+
+ result = Curl_http2_setup(conn);
+ if(result)
+ return result;
+
+ result = Curl_http2_switched(conn, NULL, 0);
+ if(result)
+ return result;
+ break;
+ case CURL_HTTP_VERSION_1_1:
+ /* continue with HTTP/1.1 when explicitly requested */
+ break;
+ default:
+ /* and as fallback */
+ break;
+ }
+ }
+ else {
+ /* prepare for a http2 request */
+ result = Curl_http2_setup(conn);
+ if(result)
+ return result;
+ }
+
+ http = data->req.protop;
+
+ if(!data->state.this_is_a_follow) {
+ /* Free to avoid leaking memory on multiple requests*/
+ free(data->state.first_host);
+
+ data->state.first_host = strdup(conn->host.name);
+ if(!data->state.first_host)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ http->writebytecount = http->readbytecount = 0;
+
+ if((conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_FTP)) &&
+ data->set.upload) {
+ httpreq = HTTPREQ_PUT;
+ }
+
+ /* Now set the 'request' pointer to the proper request string */
+ if(data->set.str[STRING_CUSTOMREQUEST])
+ request = data->set.str[STRING_CUSTOMREQUEST];
+ else {
+ if(data->set.opt_no_body)
+ request = "HEAD";
+ else {
+ DEBUGASSERT((httpreq > HTTPREQ_NONE) && (httpreq < HTTPREQ_LAST));
+ switch(httpreq) {
+ case HTTPREQ_POST:
+ case HTTPREQ_POST_FORM:
+ request = "POST";
+ break;
+ case HTTPREQ_PUT:
+ request = "PUT";
+ break;
+ default: /* this should never happen */
+ case HTTPREQ_GET:
+ request = "GET";
+ break;
+ case HTTPREQ_HEAD:
+ request = "HEAD";
+ break;
+ }
+ }
+ }
+
+ /* The User-Agent string might have been allocated in url.c already, because
+ it might have been used in the proxy connect, but if we have got a header
+ with the user-agent string specified, we erase the previously made string
+ here. */
+ if(Curl_checkheaders(conn, "User-Agent:")) {
+ free(conn->allocptr.uagent);
+ conn->allocptr.uagent=NULL;
+ }
+
+ /* setup the authentication headers */
+ result = Curl_http_output_auth(conn, request, ppath, FALSE);
+ if(result)
+ return result;
+
+ if((data->state.authhost.multi || data->state.authproxy.multi) &&
+ (httpreq != HTTPREQ_GET) &&
+ (httpreq != HTTPREQ_HEAD)) {
+ /* Auth is required and we are not authenticated yet. Make a PUT or POST
+ with content-length zero as a "probe". */
+ conn->bits.authneg = TRUE;
+ }
+ else
+ conn->bits.authneg = FALSE;
+
+ Curl_safefree(conn->allocptr.ref);
+ if(data->change.referer && !Curl_checkheaders(conn, "Referer:")) {
+ conn->allocptr.ref = aprintf("Referer: %s\r\n", data->change.referer);
+ if(!conn->allocptr.ref)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else
+ conn->allocptr.ref = NULL;
+
+#if !defined(CURL_DISABLE_COOKIES)
+ if(data->set.str[STRING_COOKIE] && !Curl_checkheaders(conn, "Cookie:"))
+ addcookies = data->set.str[STRING_COOKIE];
+#endif
+
+ if(!Curl_checkheaders(conn, "Accept-Encoding:") &&
+ data->set.str[STRING_ENCODING]) {
+ Curl_safefree(conn->allocptr.accept_encoding);
+ conn->allocptr.accept_encoding =
+ aprintf("Accept-Encoding: %s\r\n", data->set.str[STRING_ENCODING]);
+ if(!conn->allocptr.accept_encoding)
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+#ifdef HAVE_LIBZ
+ /* we only consider transfer-encoding magic if libz support is built-in */
+
+ if(!Curl_checkheaders(conn, "TE:") &&
+ data->set.http_transfer_encoding) {
+ /* When we are to insert a TE: header in the request, we must also insert
+ TE in a Connection: header, so we need to merge the custom provided
+ Connection: header and prevent the original to get sent. Note that if
+ the user has inserted his/hers own TE: header we don't do this magic
+ but then assume that the user will handle it all! */
+ char *cptr = Curl_checkheaders(conn, "Connection:");
+#define TE_HEADER "TE: gzip\r\n"
+
+ Curl_safefree(conn->allocptr.te);
+
+ /* Create the (updated) Connection: header */
+ conn->allocptr.te = cptr? aprintf("%s, TE\r\n" TE_HEADER, cptr):
+ strdup("Connection: TE\r\n" TE_HEADER);
+
+ if(!conn->allocptr.te)
+ return CURLE_OUT_OF_MEMORY;
+ }
+#endif
+
+ if(conn->httpversion == 20)
+ /* In HTTP2 forbids Transfer-Encoding: chunked */
+ ptr = NULL;
+ else {
+ ptr = Curl_checkheaders(conn, "Transfer-Encoding:");
+ if(ptr) {
+ /* Some kind of TE is requested, check if 'chunked' is chosen */
+ data->req.upload_chunky =
+ Curl_compareheader(ptr, "Transfer-Encoding:", "chunked");
+ }
+ else {
+ if((conn->handler->protocol&PROTO_FAMILY_HTTP) &&
+ data->set.upload &&
+ (data->state.infilesize == -1)) {
+ if(conn->bits.authneg)
+ /* don't enable chunked during auth neg */
+ ;
+ else if(use_http_1_1plus(data, conn)) {
+ /* HTTP, upload, unknown file size and not HTTP 1.0 */
+ data->req.upload_chunky = TRUE;
+ }
+ else {
+ failf(data, "Chunky upload is not supported by HTTP 1.0");
+ return CURLE_UPLOAD_FAILED;
+ }
+ }
+ else {
+ /* else, no chunky upload */
+ data->req.upload_chunky = FALSE;
+ }
+
+ if(data->req.upload_chunky)
+ te = "Transfer-Encoding: chunked\r\n";
+ }
+ }
+
+ Curl_safefree(conn->allocptr.host);
+
+ ptr = Curl_checkheaders(conn, "Host:");
+ if(ptr && (!data->state.this_is_a_follow ||
+ Curl_raw_equal(data->state.first_host, conn->host.name))) {
+#if !defined(CURL_DISABLE_COOKIES)
+ /* If we have a given custom Host: header, we extract the host name in
+ order to possibly use it for cookie reasons later on. We only allow the
+ custom Host: header if this is NOT a redirect, as setting Host: in the
+ redirected request is being out on thin ice. Except if the host name
+ is the same as the first one! */
+ char *cookiehost = Curl_copy_header_value(ptr);
+ if(!cookiehost)
+ return CURLE_OUT_OF_MEMORY;
+ if(!*cookiehost)
+ /* ignore empty data */
+ free(cookiehost);
+ else {
+ /* If the host begins with '[', we start searching for the port after
+ the bracket has been closed */
+ int startsearch = 0;
+ if(*cookiehost == '[') {
+ char *closingbracket;
+ /* since the 'cookiehost' is an allocated memory area that will be
+ freed later we cannot simply increment the pointer */
+ memmove(cookiehost, cookiehost + 1, strlen(cookiehost) - 1);
+ closingbracket = strchr(cookiehost, ']');
+ if(closingbracket)
+ *closingbracket = 0;
+ }
+ else {
+ char *colon = strchr(cookiehost + startsearch, ':');
+ if(colon)
+ *colon = 0; /* The host must not include an embedded port number */
+ }
+ Curl_safefree(conn->allocptr.cookiehost);
+ conn->allocptr.cookiehost = cookiehost;
+ }
+#endif
+
+ if(strcmp("Host:", ptr)) {
+ conn->allocptr.host = aprintf("%s\r\n", ptr);
+ if(!conn->allocptr.host)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else
+ /* when clearing the header */
+ conn->allocptr.host = NULL;
+ }
+ else {
+ /* When building Host: headers, we must put the host name within
+ [brackets] if the host name is a plain IPv6-address. RFC2732-style. */
+
+ if(((conn->given->protocol&CURLPROTO_HTTPS) &&
+ (conn->remote_port == PORT_HTTPS)) ||
+ ((conn->given->protocol&CURLPROTO_HTTP) &&
+ (conn->remote_port == PORT_HTTP)) )
+ /* if(HTTPS on port 443) OR (HTTP on port 80) then don't include
+ the port number in the host string */
+ conn->allocptr.host = aprintf("Host: %s%s%s\r\n",
+ conn->bits.ipv6_ip?"[":"",
+ host,
+ conn->bits.ipv6_ip?"]":"");
+ else
+ conn->allocptr.host = aprintf("Host: %s%s%s:%hu\r\n",
+ conn->bits.ipv6_ip?"[":"",
+ host,
+ conn->bits.ipv6_ip?"]":"",
+ conn->remote_port);
+
+ if(!conn->allocptr.host)
+ /* without Host: we can't make a nice request */
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+#ifndef CURL_DISABLE_PROXY
+ if(conn->bits.httpproxy && !conn->bits.tunnel_proxy) {
+ /* Using a proxy but does not tunnel through it */
+
+ /* The path sent to the proxy is in fact the entire URL. But if the remote
+ host is a IDN-name, we must make sure that the request we produce only
+ uses the encoded host name! */
+ if(conn->host.dispname != conn->host.name) {
+ char *url = data->change.url;
+ ptr = strstr(url, conn->host.dispname);
+ if(ptr) {
+ /* This is where the display name starts in the URL, now replace this
+ part with the encoded name. TODO: This method of replacing the host
+ name is rather crude as I believe there's a slight risk that the
+ user has entered a user name or password that contain the host name
+ string. */
+ size_t currlen = strlen(conn->host.dispname);
+ size_t newlen = strlen(conn->host.name);
+ size_t urllen = strlen(url);
+
+ char *newurl;
+
+ newurl = malloc(urllen + newlen - currlen + 1);
+ if(newurl) {
+ /* copy the part before the host name */
+ memcpy(newurl, url, ptr - url);
+ /* append the new host name instead of the old */
+ memcpy(newurl + (ptr - url), conn->host.name, newlen);
+ /* append the piece after the host name */
+ memcpy(newurl + newlen + (ptr - url),
+ ptr + currlen, /* copy the trailing zero byte too */
+ urllen - (ptr-url) - currlen + 1);
+ if(data->change.url_alloc) {
+ Curl_safefree(data->change.url);
+ data->change.url_alloc = FALSE;
+ }
+ data->change.url = newurl;
+ data->change.url_alloc = TRUE;
+ }
+ else
+ return CURLE_OUT_OF_MEMORY;
+ }
+ }
+ ppath = data->change.url;
+ if(checkprefix("ftp://", ppath)) {
+ if(data->set.proxy_transfer_mode) {
+ /* when doing ftp, append ;type=<a|i> if not present */
+ char *type = strstr(ppath, ";type=");
+ if(type && type[6] && type[7] == 0) {
+ switch (Curl_raw_toupper(type[6])) {
+ case 'A':
+ case 'D':
+ case 'I':
+ break;
+ default:
+ type = NULL;
+ }
+ }
+ if(!type) {
+ char *p = ftp_typecode;
+ /* avoid sending invalid URLs like ftp://example.com;type=i if the
+ * user specified ftp://example.com without the slash */
+ if(!*data->state.path && ppath[strlen(ppath) - 1] != '/') {
+ *p++ = '/';
+ }
+ snprintf(p, sizeof(ftp_typecode) - 1, ";type=%c",
+ data->set.prefer_ascii ? 'a' : 'i');
+ }
+ }
+ if(conn->bits.user_passwd && !conn->bits.userpwd_in_url)
+ paste_ftp_userpwd = TRUE;
+ }
+ }
+#endif /* CURL_DISABLE_PROXY */
+
+ if(HTTPREQ_POST_FORM == httpreq) {
+ /* we must build the whole post sequence first, so that we have a size of
+ the whole transfer before we start to send it */
+ result = Curl_getformdata(data, &http->sendit, data->set.httppost,
+ Curl_checkheaders(conn, "Content-Type:"),
+ &http->postsize);
+ if(result)
+ return result;
+ }
+
+ http->p_accept = Curl_checkheaders(conn, "Accept:")?NULL:"Accept: */*\r\n";
+
+ if(( (HTTPREQ_POST == httpreq) ||
+ (HTTPREQ_POST_FORM == httpreq) ||
+ (HTTPREQ_PUT == httpreq) ) &&
+ data->state.resume_from) {
+ /**********************************************************************
+ * Resuming upload in HTTP means that we PUT or POST and that we have
+ * got a resume_from value set. The resume value has already created
+ * a Range: header that will be passed along. We need to "fast forward"
+ * the file the given number of bytes and decrease the assume upload
+ * file size before we continue this venture in the dark lands of HTTP.
+ *********************************************************************/
+
+ if(data->state.resume_from < 0 ) {
+ /*
+ * This is meant to get the size of the present remote-file by itself.
+ * We don't support this now. Bail out!
+ */
+ data->state.resume_from = 0;
+ }
+
+ if(data->state.resume_from && !data->state.this_is_a_follow) {
+ /* do we still game? */
+
+ /* Now, let's read off the proper amount of bytes from the
+ input. */
+ if(conn->seek_func) {
+ seekerr = conn->seek_func(conn->seek_client, data->state.resume_from,
+ SEEK_SET);
+ }
+
+ if(seekerr != CURL_SEEKFUNC_OK) {
+ if(seekerr != CURL_SEEKFUNC_CANTSEEK) {
+ failf(data, "Could not seek stream");
+ return CURLE_READ_ERROR;
+ }
+ /* when seekerr == CURL_SEEKFUNC_CANTSEEK (can't seek to offset) */
+ else {
+ curl_off_t passed=0;
+ do {
+ size_t readthisamountnow =
+ (data->state.resume_from - passed > CURL_OFF_T_C(BUFSIZE)) ?
+ BUFSIZE : curlx_sotouz(data->state.resume_from - passed);
+
+ size_t actuallyread =
+ data->set.fread_func(data->state.buffer, 1, readthisamountnow,
+ data->set.in);
+
+ passed += actuallyread;
+ if((actuallyread == 0) || (actuallyread > readthisamountnow)) {
+ /* this checks for greater-than only to make sure that the
+ CURL_READFUNC_ABORT return code still aborts */
+ failf(data, "Could only read %" CURL_FORMAT_CURL_OFF_T
+ " bytes from the input", passed);
+ return CURLE_READ_ERROR;
+ }
+ } while(passed < data->state.resume_from);
+ }
+ }
+
+ /* now, decrease the size of the read */
+ if(data->state.infilesize>0) {
+ data->state.infilesize -= data->state.resume_from;
+
+ if(data->state.infilesize <= 0) {
+ failf(data, "File already completely uploaded");
+ return CURLE_PARTIAL_FILE;
+ }
+ }
+ /* we've passed, proceed as normal */
+ }
+ }
+ if(data->state.use_range) {
+ /*
+ * A range is selected. We use different headers whether we're downloading
+ * or uploading and we always let customized headers override our internal
+ * ones if any such are specified.
+ */
+ if(((httpreq == HTTPREQ_GET) || (httpreq == HTTPREQ_HEAD)) &&
+ !Curl_checkheaders(conn, "Range:")) {
+ /* if a line like this was already allocated, free the previous one */
+ free(conn->allocptr.rangeline);
+ conn->allocptr.rangeline = aprintf("Range: bytes=%s\r\n",
+ data->state.range);
+ }
+ else if((httpreq != HTTPREQ_GET) &&
+ !Curl_checkheaders(conn, "Content-Range:")) {
+
+ /* if a line like this was already allocated, free the previous one */
+ free(conn->allocptr.rangeline);
+
+ if(data->set.set_resume_from < 0) {
+ /* Upload resume was asked for, but we don't know the size of the
+ remote part so we tell the server (and act accordingly) that we
+ upload the whole file (again) */
+ conn->allocptr.rangeline =
+ aprintf("Content-Range: bytes 0-%" CURL_FORMAT_CURL_OFF_T
+ "/%" CURL_FORMAT_CURL_OFF_T "\r\n",
+ data->state.infilesize - 1, data->state.infilesize);
+
+ }
+ else if(data->state.resume_from) {
+ /* This is because "resume" was selected */
+ curl_off_t total_expected_size=
+ data->state.resume_from + data->state.infilesize;
+ conn->allocptr.rangeline =
+ aprintf("Content-Range: bytes %s%" CURL_FORMAT_CURL_OFF_T
+ "/%" CURL_FORMAT_CURL_OFF_T "\r\n",
+ data->state.range, total_expected_size-1,
+ total_expected_size);
+ }
+ else {
+ /* Range was selected and then we just pass the incoming range and
+ append total size */
+ conn->allocptr.rangeline =
+ aprintf("Content-Range: bytes %s/%" CURL_FORMAT_CURL_OFF_T "\r\n",
+ data->state.range, data->state.infilesize);
+ }
+ if(!conn->allocptr.rangeline)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ }
+
+ /* Use 1.1 unless the user specifically asked for 1.0 or the server only
+ supports 1.0 */
+ httpstring= use_http_1_1plus(data, conn)?"1.1":"1.0";
+
+ /* initialize a dynamic send-buffer */
+ req_buffer = Curl_add_buffer_init();
+
+ if(!req_buffer)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* add the main request stuff */
+ /* GET/HEAD/POST/PUT */
+ result = Curl_add_bufferf(req_buffer, "%s ", request);
+ if(result)
+ return result;
+
+ /* url */
+ if(paste_ftp_userpwd)
+ result = Curl_add_bufferf(req_buffer, "ftp://%s:%s@%s",
+ conn->user, conn->passwd,
+ ppath + sizeof("ftp://") - 1);
+ else
+ result = Curl_add_buffer(req_buffer, ppath, strlen(ppath));
+ if(result)
+ return result;
+
+ result =
+ Curl_add_bufferf(req_buffer,
+ "%s" /* ftp typecode (;type=x) */
+ " HTTP/%s\r\n" /* HTTP version */
+ "%s" /* host */
+ "%s" /* proxyuserpwd */
+ "%s" /* userpwd */
+ "%s" /* range */
+ "%s" /* user agent */
+ "%s" /* accept */
+ "%s" /* TE: */
+ "%s" /* accept-encoding */
+ "%s" /* referer */
+ "%s" /* Proxy-Connection */
+ "%s",/* transfer-encoding */
+
+ ftp_typecode,
+ httpstring,
+ (conn->allocptr.host?conn->allocptr.host:""),
+ conn->allocptr.proxyuserpwd?
+ conn->allocptr.proxyuserpwd:"",
+ conn->allocptr.userpwd?conn->allocptr.userpwd:"",
+ (data->state.use_range && conn->allocptr.rangeline)?
+ conn->allocptr.rangeline:"",
+ (data->set.str[STRING_USERAGENT] &&
+ *data->set.str[STRING_USERAGENT] &&
+ conn->allocptr.uagent)?
+ conn->allocptr.uagent:"",
+ http->p_accept?http->p_accept:"",
+ conn->allocptr.te?conn->allocptr.te:"",
+ (data->set.str[STRING_ENCODING] &&
+ *data->set.str[STRING_ENCODING] &&
+ conn->allocptr.accept_encoding)?
+ conn->allocptr.accept_encoding:"",
+ (data->change.referer && conn->allocptr.ref)?
+ conn->allocptr.ref:"" /* Referer: <data> */,
+ (conn->bits.httpproxy &&
+ !conn->bits.tunnel_proxy &&
+ !Curl_checkProxyheaders(conn, "Proxy-Connection:"))?
+ "Proxy-Connection: Keep-Alive\r\n":"",
+ te
+ );
+
+ /*
+ * Free userpwd for Negotiate/NTLM. Cannot reuse as it is associated with
+ * the connection and shouldn't be repeated over it either.
+ */
+ switch (data->state.authhost.picked) {
+ case CURLAUTH_NEGOTIATE:
+ case CURLAUTH_NTLM:
+ case CURLAUTH_NTLM_WB:
+ Curl_safefree(conn->allocptr.userpwd);
+ break;
+ }
+
+ /*
+ * Same for proxyuserpwd
+ */
+ switch (data->state.authproxy.picked) {
+ case CURLAUTH_NEGOTIATE:
+ case CURLAUTH_NTLM:
+ case CURLAUTH_NTLM_WB:
+ Curl_safefree(conn->allocptr.proxyuserpwd);
+ break;
+ }
+
+ if(result)
+ return result;
+
+ if(!(conn->handler->flags&PROTOPT_SSL) &&
+ conn->httpversion != 20 &&
+ (data->set.httpversion == CURL_HTTP_VERSION_2_0)) {
+ /* append HTTP2 upgrade magic stuff to the HTTP request if it isn't done
+ over SSL */
+ result = Curl_http2_request_upgrade(req_buffer, conn);
+ if(result)
+ return result;
+ }
+
+#if !defined(CURL_DISABLE_COOKIES)
+ if(data->cookies || addcookies) {
+ struct Cookie *co=NULL; /* no cookies from start */
+ int count=0;
+
+ if(data->cookies) {
+ Curl_share_lock(data, CURL_LOCK_DATA_COOKIE, CURL_LOCK_ACCESS_SINGLE);
+ co = Curl_cookie_getlist(data->cookies,
+ conn->allocptr.cookiehost?
+ conn->allocptr.cookiehost:host,
+ data->state.path,
+ (conn->handler->protocol&CURLPROTO_HTTPS)?
+ TRUE:FALSE);
+ Curl_share_unlock(data, CURL_LOCK_DATA_COOKIE);
+ }
+ if(co) {
+ struct Cookie *store=co;
+ /* now loop through all cookies that matched */
+ while(co) {
+ if(co->value) {
+ if(0 == count) {
+ result = Curl_add_bufferf(req_buffer, "Cookie: ");
+ if(result)
+ break;
+ }
+ result = Curl_add_bufferf(req_buffer,
+ "%s%s=%s", count?"; ":"",
+ co->name, co->value);
+ if(result)
+ break;
+ count++;
+ }
+ co = co->next; /* next cookie please */
+ }
+ Curl_cookie_freelist(store, FALSE); /* free the cookie list */
+ }
+ if(addcookies && !result) {
+ if(!count)
+ result = Curl_add_bufferf(req_buffer, "Cookie: ");
+ if(!result) {
+ result = Curl_add_bufferf(req_buffer, "%s%s", count?"; ":"",
+ addcookies);
+ count++;
+ }
+ }
+ if(count && !result)
+ result = Curl_add_buffer(req_buffer, "\r\n", 2);
+
+ if(result)
+ return result;
+ }
+#endif
+
+ if(data->set.timecondition) {
+ result = Curl_add_timecondition(data, req_buffer);
+ if(result)
+ return result;
+ }
+
+ result = Curl_add_custom_headers(conn, FALSE, req_buffer);
+ if(result)
+ return result;
+
+ http->postdata = NULL; /* nothing to post at this point */
+ Curl_pgrsSetUploadSize(data, -1); /* upload size is unknown atm */
+
+ /* If 'authdone' is FALSE, we must not set the write socket index to the
+ Curl_transfer() call below, as we're not ready to actually upload any
+ data yet. */
+
+ switch(httpreq) {
+
+ case HTTPREQ_POST_FORM:
+ if(!http->sendit || conn->bits.authneg) {
+ /* nothing to post! */
+ result = Curl_add_bufferf(req_buffer, "Content-Length: 0\r\n\r\n");
+ if(result)
+ return result;
+
+ result = Curl_add_buffer_send(req_buffer, conn,
+ &data->info.request_size, 0, FIRSTSOCKET);
+ if(result)
+ failf(data, "Failed sending POST request");
+ else
+ /* setup variables for the upcoming transfer */
+ Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE, &http->readbytecount,
+ -1, NULL);
+ break;
+ }
+
+ if(Curl_FormInit(&http->form, http->sendit)) {
+ failf(data, "Internal HTTP POST error!");
+ return CURLE_HTTP_POST_ERROR;
+ }
+
+ /* Get the currently set callback function pointer and store that in the
+ form struct since we might want the actual user-provided callback later
+ on. The conn->fread_func pointer itself will be changed for the
+ multipart case to the function that returns a multipart formatted
+ stream. */
+ http->form.fread_func = conn->fread_func;
+
+ /* Set the read function to read from the generated form data */
+ conn->fread_func = (curl_read_callback)Curl_FormReader;
+ conn->fread_in = &http->form;
+
+ http->sending = HTTPSEND_BODY;
+
+ if(!data->req.upload_chunky &&
+ !Curl_checkheaders(conn, "Content-Length:")) {
+ /* only add Content-Length if not uploading chunked */
+ result = Curl_add_bufferf(req_buffer,
+ "Content-Length: %" CURL_FORMAT_CURL_OFF_T
+ "\r\n", http->postsize);
+ if(result)
+ return result;
+ }
+
+ result = expect100(data, conn, req_buffer);
+ if(result)
+ return result;
+
+ {
+
+ /* Get Content-Type: line from Curl_formpostheader.
+ */
+ char *contentType;
+ size_t linelength=0;
+ contentType = Curl_formpostheader((void *)&http->form,
+ &linelength);
+ if(!contentType) {
+ failf(data, "Could not get Content-Type header line!");
+ return CURLE_HTTP_POST_ERROR;
+ }
+
+ result = Curl_add_buffer(req_buffer, contentType, linelength);
+ if(result)
+ return result;
+ }
+
+ /* make the request end in a true CRLF */
+ result = Curl_add_buffer(req_buffer, "\r\n", 2);
+ if(result)
+ return result;
+
+ /* set upload size to the progress meter */
+ Curl_pgrsSetUploadSize(data, http->postsize);
+
+ /* fire away the whole request to the server */
+ result = Curl_add_buffer_send(req_buffer, conn,
+ &data->info.request_size, 0, FIRSTSOCKET);
+ if(result)
+ failf(data, "Failed sending POST request");
+ else
+ /* setup variables for the upcoming transfer */
+ Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE,
+ &http->readbytecount, FIRSTSOCKET,
+ &http->writebytecount);
+
+ if(result) {
+ Curl_formclean(&http->sendit); /* free that whole lot */
+ return result;
+ }
+
+ /* convert the form data */
+ result = Curl_convert_form(data, http->sendit);
+ if(result) {
+ Curl_formclean(&http->sendit); /* free that whole lot */
+ return result;
+ }
+
+ break;
+
+ case HTTPREQ_PUT: /* Let's PUT the data to the server! */
+
+ if(conn->bits.authneg)
+ postsize = 0;
+ else
+ postsize = data->state.infilesize;
+
+ if((postsize != -1) && !data->req.upload_chunky &&
+ !Curl_checkheaders(conn, "Content-Length:")) {
+ /* only add Content-Length if not uploading chunked */
+ result = Curl_add_bufferf(req_buffer,
+ "Content-Length: %" CURL_FORMAT_CURL_OFF_T
+ "\r\n", postsize);
+ if(result)
+ return result;
+ }
+
+ if(postsize != 0) {
+ result = expect100(data, conn, req_buffer);
+ if(result)
+ return result;
+ }
+
+ result = Curl_add_buffer(req_buffer, "\r\n", 2); /* end of headers */
+ if(result)
+ return result;
+
+ /* set the upload size to the progress meter */
+ Curl_pgrsSetUploadSize(data, postsize);
+
+ /* this sends the buffer and frees all the buffer resources */
+ result = Curl_add_buffer_send(req_buffer, conn,
+ &data->info.request_size, 0, FIRSTSOCKET);
+ if(result)
+ failf(data, "Failed sending PUT request");
+ else
+ /* prepare for transfer */
+ Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE,
+ &http->readbytecount, postsize?FIRSTSOCKET:-1,
+ postsize?&http->writebytecount:NULL);
+ if(result)
+ return result;
+ break;
+
+ case HTTPREQ_POST:
+ /* this is the simple POST, using x-www-form-urlencoded style */
+
+ if(conn->bits.authneg)
+ postsize = 0;
+ else {
+ /* figure out the size of the postfields */
+ postsize = (data->set.postfieldsize != -1)?
+ data->set.postfieldsize:
+ (data->set.postfields? (curl_off_t)strlen(data->set.postfields):-1);
+ }
+
+ /* We only set Content-Length and allow a custom Content-Length if
+ we don't upload data chunked, as RFC2616 forbids us to set both
+ kinds of headers (Transfer-Encoding: chunked and Content-Length) */
+ if((postsize != -1) && !data->req.upload_chunky &&
+ !Curl_checkheaders(conn, "Content-Length:")) {
+ /* we allow replacing this header if not during auth negotiation,
+ although it isn't very wise to actually set your own */
+ result = Curl_add_bufferf(req_buffer,
+ "Content-Length: %" CURL_FORMAT_CURL_OFF_T
+ "\r\n", postsize);
+ if(result)
+ return result;
+ }
+
+ if(!Curl_checkheaders(conn, "Content-Type:")) {
+ result = Curl_add_bufferf(req_buffer,
+ "Content-Type: application/"
+ "x-www-form-urlencoded\r\n");
+ if(result)
+ return result;
+ }
+
+ /* For really small posts we don't use Expect: headers at all, and for
+ the somewhat bigger ones we allow the app to disable it. Just make
+ sure that the expect100header is always set to the preferred value
+ here. */
+ ptr = Curl_checkheaders(conn, "Expect:");
+ if(ptr) {
+ data->state.expect100header =
+ Curl_compareheader(ptr, "Expect:", "100-continue");
+ }
+ else if(postsize > TINY_INITIAL_POST_SIZE || postsize < 0) {
+ result = expect100(data, conn, req_buffer);
+ if(result)
+ return result;
+ }
+ else
+ data->state.expect100header = FALSE;
+
+ if(data->set.postfields) {
+
+ /* In HTTP2, we send request body in DATA frame regardless of
+ its size. */
+ if(conn->httpversion != 20 &&
+ !data->state.expect100header &&
+ (postsize < MAX_INITIAL_POST_SIZE)) {
+ /* if we don't use expect: 100 AND
+ postsize is less than MAX_INITIAL_POST_SIZE
+
+ then append the post data to the HTTP request header. This limit
+ is no magic limit but only set to prevent really huge POSTs to
+ get the data duplicated with malloc() and family. */
+
+ result = Curl_add_buffer(req_buffer, "\r\n", 2); /* end of headers! */
+ if(result)
+ return result;
+
+ if(!data->req.upload_chunky) {
+ /* We're not sending it 'chunked', append it to the request
+ already now to reduce the number if send() calls */
+ result = Curl_add_buffer(req_buffer, data->set.postfields,
+ (size_t)postsize);
+ included_body = postsize;
+ }
+ else {
+ if(postsize) {
+ /* Append the POST data chunky-style */
+ result = Curl_add_bufferf(req_buffer, "%x\r\n", (int)postsize);
+ if(!result) {
+ result = Curl_add_buffer(req_buffer, data->set.postfields,
+ (size_t)postsize);
+ if(!result)
+ result = Curl_add_buffer(req_buffer, "\r\n", 2);
+ included_body = postsize + 2;
+ }
+ }
+ if(!result)
+ result = Curl_add_buffer(req_buffer, "\x30\x0d\x0a\x0d\x0a", 5);
+ /* 0 CR LF CR LF */
+ included_body += 5;
+ }
+ if(result)
+ return result;
+ /* Make sure the progress information is accurate */
+ Curl_pgrsSetUploadSize(data, postsize);
+ }
+ else {
+ /* A huge POST coming up, do data separate from the request */
+ http->postsize = postsize;
+ http->postdata = data->set.postfields;
+
+ http->sending = HTTPSEND_BODY;
+
+ conn->fread_func = (curl_read_callback)readmoredata;
+ conn->fread_in = (void *)conn;
+
+ /* set the upload size to the progress meter */
+ Curl_pgrsSetUploadSize(data, http->postsize);
+
+ result = Curl_add_buffer(req_buffer, "\r\n", 2); /* end of headers! */
+ if(result)
+ return result;
+ }
+ }
+ else {
+ result = Curl_add_buffer(req_buffer, "\r\n", 2); /* end of headers! */
+ if(result)
+ return result;
+
+ if(data->req.upload_chunky && conn->bits.authneg) {
+ /* Chunky upload is selected and we're negotiating auth still, send
+ end-of-data only */
+ result = Curl_add_buffer(req_buffer,
+ "\x30\x0d\x0a\x0d\x0a", 5);
+ /* 0 CR LF CR LF */
+ if(result)
+ return result;
+ }
+
+ else if(data->set.postfieldsize) {
+ /* set the upload size to the progress meter */
+ Curl_pgrsSetUploadSize(data, postsize?postsize:-1);
+
+ /* set the pointer to mark that we will send the post body using the
+ read callback, but only if we're not in authenticate
+ negotiation */
+ if(!conn->bits.authneg) {
+ http->postdata = (char *)&http->postdata;
+ http->postsize = postsize;
+ }
+ }
+ }
+ /* issue the request */
+ result = Curl_add_buffer_send(req_buffer, conn, &data->info.request_size,
+ (size_t)included_body, FIRSTSOCKET);
+
+ if(result)
+ failf(data, "Failed sending HTTP POST request");
+ else
+ Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE,
+ &http->readbytecount, http->postdata?FIRSTSOCKET:-1,
+ http->postdata?&http->writebytecount:NULL);
+ break;
+
+ default:
+ result = Curl_add_buffer(req_buffer, "\r\n", 2);
+ if(result)
+ return result;
+
+ /* issue the request */
+ result = Curl_add_buffer_send(req_buffer, conn,
+ &data->info.request_size, 0, FIRSTSOCKET);
+
+ if(result)
+ failf(data, "Failed sending HTTP request");
+ else
+ /* HTTP GET/HEAD download: */
+ Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE, &http->readbytecount,
+ http->postdata?FIRSTSOCKET:-1,
+ http->postdata?&http->writebytecount:NULL);
+ }
+ if(result)
+ return result;
+
+ if(http->writebytecount) {
+ /* if a request-body has been sent off, we make sure this progress is noted
+ properly */
+ Curl_pgrsSetUploadCounter(data, http->writebytecount);
+ if(Curl_pgrsUpdate(conn))
+ result = CURLE_ABORTED_BY_CALLBACK;
+
+ if(http->writebytecount >= postsize) {
+ /* already sent the entire request body, mark the "upload" as
+ complete */
+ infof(data, "upload completely sent off: %" CURL_FORMAT_CURL_OFF_T
+ " out of %" CURL_FORMAT_CURL_OFF_T " bytes\n",
+ http->writebytecount, postsize);
+ data->req.upload_done = TRUE;
+ data->req.keepon &= ~KEEP_SEND; /* we're done writing */
+ data->req.exp100 = EXP100_SEND_DATA; /* already sent */
+ }
+ }
+
+ return result;
+}
+
+/*
+ * checkhttpprefix()
+ *
+ * Returns TRUE if member of the list matches prefix of string
+ */
+static bool
+checkhttpprefix(struct SessionHandle *data,
+ const char *s)
+{
+ struct curl_slist *head = data->set.http200aliases;
+ bool rc = FALSE;
+#ifdef CURL_DOES_CONVERSIONS
+ /* convert from the network encoding using a scratch area */
+ char *scratch = strdup(s);
+ if(NULL == scratch) {
+ failf (data, "Failed to allocate memory for conversion!");
+ return FALSE; /* can't return CURLE_OUT_OF_MEMORY so return FALSE */
+ }
+ if(CURLE_OK != Curl_convert_from_network(data, scratch, strlen(s)+1)) {
+ /* Curl_convert_from_network calls failf if unsuccessful */
+ free(scratch);
+ return FALSE; /* can't return CURLE_foobar so return FALSE */
+ }
+ s = scratch;
+#endif /* CURL_DOES_CONVERSIONS */
+
+ while(head) {
+ if(checkprefix(head->data, s)) {
+ rc = TRUE;
+ break;
+ }
+ head = head->next;
+ }
+
+ if(!rc && (checkprefix("HTTP/", s)))
+ rc = TRUE;
+
+#ifdef CURL_DOES_CONVERSIONS
+ free(scratch);
+#endif /* CURL_DOES_CONVERSIONS */
+ return rc;
+}
+
+#ifndef CURL_DISABLE_RTSP
+static bool
+checkrtspprefix(struct SessionHandle *data,
+ const char *s)
+{
+
+#ifdef CURL_DOES_CONVERSIONS
+ /* convert from the network encoding using a scratch area */
+ char *scratch = strdup(s);
+ if(NULL == scratch) {
+ failf (data, "Failed to allocate memory for conversion!");
+ return FALSE; /* can't return CURLE_OUT_OF_MEMORY so return FALSE */
+ }
+ if(CURLE_OK != Curl_convert_from_network(data, scratch, strlen(s)+1)) {
+ /* Curl_convert_from_network calls failf if unsuccessful */
+ free(scratch);
+ return FALSE; /* can't return CURLE_foobar so return FALSE */
+ }
+ s = scratch;
+#else
+ (void)data; /* unused */
+#endif /* CURL_DOES_CONVERSIONS */
+ if(checkprefix("RTSP/", s))
+ return TRUE;
+ else
+ return FALSE;
+}
+#endif /* CURL_DISABLE_RTSP */
+
+static bool
+checkprotoprefix(struct SessionHandle *data, struct connectdata *conn,
+ const char *s)
+{
+#ifndef CURL_DISABLE_RTSP
+ if(conn->handler->protocol & CURLPROTO_RTSP)
+ return checkrtspprefix(data, s);
+#else
+ (void)conn;
+#endif /* CURL_DISABLE_RTSP */
+
+ return checkhttpprefix(data, s);
+}
+
+/*
+ * header_append() copies a chunk of data to the end of the already received
+ * header. We make sure that the full string fit in the allocated header
+ * buffer, or else we enlarge it.
+ */
+static CURLcode header_append(struct SessionHandle *data,
+ struct SingleRequest *k,
+ size_t length)
+{
+ if(k->hbuflen + length >= data->state.headersize) {
+ /* We enlarge the header buffer as it is too small */
+ char *newbuff;
+ size_t hbufp_index;
+ size_t newsize;
+
+ if(k->hbuflen + length > CURL_MAX_HTTP_HEADER) {
+ /* The reason to have a max limit for this is to avoid the risk of a bad
+ server feeding libcurl with a never-ending header that will cause
+ reallocs infinitely */
+ failf (data, "Avoided giant realloc for header (max is %d)!",
+ CURL_MAX_HTTP_HEADER);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ newsize=CURLMAX((k->hbuflen+ length)*3/2, data->state.headersize*2);
+ hbufp_index = k->hbufp - data->state.headerbuff;
+ newbuff = realloc(data->state.headerbuff, newsize);
+ if(!newbuff) {
+ failf (data, "Failed to alloc memory for big header!");
+ return CURLE_OUT_OF_MEMORY;
+ }
+ data->state.headersize=newsize;
+ data->state.headerbuff = newbuff;
+ k->hbufp = data->state.headerbuff + hbufp_index;
+ }
+ memcpy(k->hbufp, k->str_start, length);
+ k->hbufp += length;
+ k->hbuflen += length;
+ *k->hbufp = 0;
+
+ return CURLE_OK;
+}
+
+static void print_http_error(struct SessionHandle *data)
+{
+ struct SingleRequest *k = &data->req;
+ char *beg = k->p;
+
+ /* make sure that data->req.p points to the HTTP status line */
+ if(!strncmp(beg, "HTTP", 4)) {
+
+ /* skip to HTTP status code */
+ beg = strchr(beg, ' ');
+ if(beg && *++beg) {
+
+ /* find trailing CR */
+ char end_char = '\r';
+ char *end = strchr(beg, end_char);
+ if(!end) {
+ /* try to find LF (workaround for non-compliant HTTP servers) */
+ end_char = '\n';
+ end = strchr(beg, end_char);
+ }
+
+ if(end) {
+ /* temporarily replace CR or LF by NUL and print the error message */
+ *end = '\0';
+ failf(data, "The requested URL returned error: %s", beg);
+
+ /* restore the previously replaced CR or LF */
+ *end = end_char;
+ return;
+ }
+ }
+ }
+
+ /* fall-back to printing the HTTP status code only */
+ failf(data, "The requested URL returned error: %d", k->httpcode);
+}
+
+/*
+ * Read any HTTP header lines from the server and pass them to the client app.
+ */
+CURL_STATIC CURLcode Curl_http_readwrite_headers(struct SessionHandle *data,
+ struct connectdata *conn,
+ ssize_t *nread,
+ bool *stop_reading)
+{
+ CURLcode result;
+ struct SingleRequest *k = &data->req;
+
+ /* header line within buffer loop */
+ do {
+ size_t rest_length;
+ size_t full_length;
+ int writetype;
+
+ /* str_start is start of line within buf */
+ k->str_start = k->str;
+
+ /* data is in network encoding so use 0x0a instead of '\n' */
+ k->end_ptr = memchr(k->str_start, 0x0a, *nread);
+
+ if(!k->end_ptr) {
+ /* Not a complete header line within buffer, append the data to
+ the end of the headerbuff. */
+ result = header_append(data, k, *nread);
+ if(result)
+ return result;
+
+ if(!k->headerline && (k->hbuflen>5)) {
+ /* make a first check that this looks like a protocol header */
+ if(!checkprotoprefix(data, conn, data->state.headerbuff)) {
+ /* this is not the beginning of a protocol first header line */
+ k->header = FALSE;
+ k->badheader = HEADER_ALLBAD;
+ break;
+ }
+ }
+
+ break; /* read more and try again */
+ }
+
+ /* decrease the size of the remaining (supposed) header line */
+ rest_length = (k->end_ptr - k->str)+1;
+ *nread -= (ssize_t)rest_length;
+
+ k->str = k->end_ptr + 1; /* move past new line */
+
+ full_length = k->str - k->str_start;
+
+ result = header_append(data, k, full_length);
+ if(result)
+ return result;
+
+ k->end_ptr = k->hbufp;
+ k->p = data->state.headerbuff;
+
+ /****
+ * We now have a FULL header line that p points to
+ *****/
+
+ if(!k->headerline) {
+ /* the first read header */
+ if((k->hbuflen>5) &&
+ !checkprotoprefix(data, conn, data->state.headerbuff)) {
+ /* this is not the beginning of a protocol first header line */
+ k->header = FALSE;
+ if(*nread)
+ /* since there's more, this is a partial bad header */
+ k->badheader = HEADER_PARTHEADER;
+ else {
+ /* this was all we read so it's all a bad header */
+ k->badheader = HEADER_ALLBAD;
+ *nread = (ssize_t)rest_length;
+ }
+ break;
+ }
+ }
+
+ /* headers are in network encoding so
+ use 0x0a and 0x0d instead of '\n' and '\r' */
+ if((0x0a == *k->p) || (0x0d == *k->p)) {
+ size_t headerlen;
+ /* Zero-length header line means end of headers! */
+
+#ifdef CURL_DOES_CONVERSIONS
+ if(0x0d == *k->p) {
+ *k->p = '\r'; /* replace with CR in host encoding */
+ k->p++; /* pass the CR byte */
+ }
+ if(0x0a == *k->p) {
+ *k->p = '\n'; /* replace with LF in host encoding */
+ k->p++; /* pass the LF byte */
+ }
+#else
+ if('\r' == *k->p)
+ k->p++; /* pass the \r byte */
+ if('\n' == *k->p)
+ k->p++; /* pass the \n byte */
+#endif /* CURL_DOES_CONVERSIONS */
+
+ if(100 <= k->httpcode && 199 >= k->httpcode) {
+ /*
+ * We have made a HTTP PUT or POST and this is 1.1-lingo
+ * that tells us that the server is OK with this and ready
+ * to receive the data.
+ * However, we'll get more headers now so we must get
+ * back into the header-parsing state!
+ */
+ k->header = TRUE;
+ k->headerline = 0; /* restart the header line counter */
+
+ /* "A user agent MAY ignore unexpected 1xx status responses." */
+ switch(k->httpcode) {
+ case 100:
+ /* if we did wait for this do enable write now! */
+ if(k->exp100) {
+ k->exp100 = EXP100_SEND_DATA;
+ k->keepon |= KEEP_SEND;
+ }
+ break;
+ case 101:
+ /* Switching Protocols */
+ if(k->upgr101 == UPGR101_REQUESTED) {
+ infof(data, "Received 101\n");
+ k->upgr101 = UPGR101_RECEIVED;
+
+ /* switch to http2 now. The bytes after response headers
+ are also processed here, otherwise they are lost. */
+ result = Curl_http2_switched(conn, k->str, *nread);
+ if(result)
+ return result;
+ *nread = 0;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ else {
+ k->header = FALSE; /* no more header to parse! */
+
+ if((k->size == -1) && !k->chunk && !conn->bits.close &&
+ (conn->httpversion == 11) &&
+ !(conn->handler->protocol & CURLPROTO_RTSP) &&
+ data->set.httpreq != HTTPREQ_HEAD) {
+ /* On HTTP 1.1, when connection is not to get closed, but no
+ Content-Length nor Content-Encoding chunked have been
+ received, according to RFC2616 section 4.4 point 5, we
+ assume that the server will close the connection to
+ signal the end of the document. */
+ infof(data, "no chunk, no close, no size. Assume close to "
+ "signal end\n");
+ connclose(conn, "HTTP: No end-of-message indicator");
+ }
+ }
+
+ /*
+ * When all the headers have been parsed, see if we should give
+ * up and return an error.
+ */
+ if(http_should_fail(conn)) {
+ failf (data, "The requested URL returned error: %d",
+ k->httpcode);
+ return CURLE_HTTP_RETURNED_ERROR;
+ }
+
+ /* now, only output this if the header AND body are requested:
+ */
+ writetype = CLIENTWRITE_HEADER;
+ if(data->set.include_header)
+ writetype |= CLIENTWRITE_BODY;
+
+ headerlen = k->p - data->state.headerbuff;
+
+ result = Curl_client_write(conn, writetype,
+ data->state.headerbuff,
+ headerlen);
+ if(result)
+ return result;
+
+ data->info.header_size += (long)headerlen;
+ data->req.headerbytecount += (long)headerlen;
+
+ data->req.deductheadercount =
+ (100 <= k->httpcode && 199 >= k->httpcode)?data->req.headerbytecount:0;
+
+ if(!*stop_reading) {
+ /* Curl_http_auth_act() checks what authentication methods
+ * that are available and decides which one (if any) to
+ * use. It will set 'newurl' if an auth method was picked. */
+ result = Curl_http_auth_act(conn);
+
+ if(result)
+ return result;
+
+ if(k->httpcode >= 300) {
+ if((!conn->bits.authneg) && !conn->bits.close &&
+ !conn->bits.rewindaftersend) {
+ /*
+ * General treatment of errors when about to send data. Including :
+ * "417 Expectation Failed", while waiting for 100-continue.
+ *
+ * The check for close above is done simply because of something
+ * else has already deemed the connection to get closed then
+ * something else should've considered the big picture and we
+ * avoid this check.
+ *
+ * rewindaftersend indicates that something has told libcurl to
+ * continue sending even if it gets discarded
+ */
+
+ switch(data->set.httpreq) {
+ case HTTPREQ_PUT:
+ case HTTPREQ_POST:
+ case HTTPREQ_POST_FORM:
+ /* We got an error response. If this happened before the whole
+ * request body has been sent we stop sending and mark the
+ * connection for closure after we've read the entire response.
+ */
+ if(!k->upload_done) {
+ infof(data, "HTTP error before end of send, stop sending\n");
+ connclose(conn, "Stop sending data before everything sent");
+ k->upload_done = TRUE;
+ k->keepon &= ~KEEP_SEND; /* don't send */
+ if(data->state.expect100header)
+ k->exp100 = EXP100_FAILED;
+ }
+ break;
+
+ default: /* default label present to avoid compiler warnings */
+ break;
+ }
+ }
+ }
+
+ if(conn->bits.rewindaftersend) {
+ /* We rewind after a complete send, so thus we continue
+ sending now */
+ infof(data, "Keep sending data to get tossed away!\n");
+ k->keepon |= KEEP_SEND;
+ }
+ }
+
+ if(!k->header) {
+ /*
+ * really end-of-headers.
+ *
+ * If we requested a "no body", this is a good time to get
+ * out and return home.
+ */
+ if(data->set.opt_no_body)
+ *stop_reading = TRUE;
+ else {
+ /* If we know the expected size of this document, we set the
+ maximum download size to the size of the expected
+ document or else, we won't know when to stop reading!
+
+ Note that we set the download maximum even if we read a
+ "Connection: close" header, to make sure that
+ "Content-Length: 0" still prevents us from attempting to
+ read the (missing) response-body.
+ */
+ /* According to RFC2616 section 4.4, we MUST ignore
+ Content-Length: headers if we are now receiving data
+ using chunked Transfer-Encoding.
+ */
+ if(k->chunk)
+ k->maxdownload = k->size = -1;
+ }
+ if(-1 != k->size) {
+ /* We do this operation even if no_body is true, since this
+ data might be retrieved later with curl_easy_getinfo()
+ and its CURLINFO_CONTENT_LENGTH_DOWNLOAD option. */
+
+ Curl_pgrsSetDownloadSize(data, k->size);
+ k->maxdownload = k->size;
+ }
+
+ /* If max download size is *zero* (nothing) we already
+ have nothing and can safely return ok now! */
+ if(0 == k->maxdownload)
+ *stop_reading = TRUE;
+
+ if(*stop_reading) {
+ /* we make sure that this socket isn't read more now */
+ k->keepon &= ~KEEP_RECV;
+ }
+
+ if(data->set.verbose)
+ Curl_debug(data, CURLINFO_HEADER_IN,
+ k->str_start, headerlen, conn);
+ break; /* exit header line loop */
+ }
+
+ /* We continue reading headers, so reset the line-based
+ header parsing variables hbufp && hbuflen */
+ k->hbufp = data->state.headerbuff;
+ k->hbuflen = 0;
+ continue;
+ }
+
+ /*
+ * Checks for special headers coming up.
+ */
+
+ if(!k->headerline++) {
+ /* This is the first header, it MUST be the error code line
+ or else we consider this to be the body right away! */
+ int httpversion_major;
+ int rtspversion_major;
+ int nc = 0;
+#ifdef CURL_DOES_CONVERSIONS
+#define HEADER1 scratch
+#define SCRATCHSIZE 21
+ CURLcode res;
+ char scratch[SCRATCHSIZE+1]; /* "HTTP/major.minor 123" */
+ /* We can't really convert this yet because we
+ don't know if it's the 1st header line or the body.
+ So we do a partial conversion into a scratch area,
+ leaving the data at k->p as-is.
+ */
+ strncpy(&scratch[0], k->p, SCRATCHSIZE);
+ scratch[SCRATCHSIZE] = 0; /* null terminate */
+ res = Curl_convert_from_network(data,
+ &scratch[0],
+ SCRATCHSIZE);
+ if(res)
+ /* Curl_convert_from_network calls failf if unsuccessful */
+ return res;
+#else
+#define HEADER1 k->p /* no conversion needed, just use k->p */
+#endif /* CURL_DOES_CONVERSIONS */
+
+ if(conn->handler->protocol & PROTO_FAMILY_HTTP) {
+ /*
+ * https://tools.ietf.org/html/rfc7230#section-3.1.2
+ *
+ * The reponse code is always a three-digit number in HTTP as the spec
+ * says. We try to allow any number here, but we cannot make
+ * guarantees on future behaviors since it isn't within the protocol.
+ */
+ nc = sscanf(HEADER1,
+ " HTTP/%d.%d %d",
+ &httpversion_major,
+ &conn->httpversion,
+ &k->httpcode);
+ if(nc==3) {
+ conn->httpversion += 10 * httpversion_major;
+
+ if(k->upgr101 == UPGR101_RECEIVED) {
+ /* supposedly upgraded to http2 now */
+ if(conn->httpversion != 20)
+ infof(data, "Lying server, not serving HTTP/2\n");
+ }
+ }
+ else {
+ /* this is the real world, not a Nirvana
+ NCSA 1.5.x returns this crap when asked for HTTP/1.1
+ */
+ nc=sscanf(HEADER1, " HTTP %3d", &k->httpcode);
+ conn->httpversion = 10;
+
+ /* If user has set option HTTP200ALIASES,
+ compare header line against list of aliases
+ */
+ if(!nc) {
+ if(checkhttpprefix(data, k->p)) {
+ nc = 1;
+ k->httpcode = 200;
+ conn->httpversion = 10;
+ }
+ }
+ }
+ }
+ else if(conn->handler->protocol & CURLPROTO_RTSP) {
+ nc = sscanf(HEADER1,
+ " RTSP/%d.%d %3d",
+ &rtspversion_major,
+ &conn->rtspversion,
+ &k->httpcode);
+ if(nc==3) {
+ conn->rtspversion += 10 * rtspversion_major;
+ conn->httpversion = 11; /* For us, RTSP acts like HTTP 1.1 */
+ }
+ else {
+ /* TODO: do we care about the other cases here? */
+ nc = 0;
+ }
+ }
+
+ if(nc) {
+ data->info.httpcode = k->httpcode;
+
+ data->info.httpversion = conn->httpversion;
+ if(!data->state.httpversion ||
+ data->state.httpversion > conn->httpversion)
+ /* store the lowest server version we encounter */
+ data->state.httpversion = conn->httpversion;
+
+ /*
+ * This code executes as part of processing the header. As a
+ * result, it's not totally clear how to interpret the
+ * response code yet as that depends on what other headers may
+ * be present. 401 and 407 may be errors, but may be OK
+ * depending on how authentication is working. Other codes
+ * are definitely errors, so give up here.
+ */
+ if(data->set.http_fail_on_error && (k->httpcode >= 400) &&
+ ((k->httpcode != 401) || !conn->bits.user_passwd) &&
+ ((k->httpcode != 407) || !conn->bits.proxy_user_passwd) ) {
+
+ if(data->state.resume_from &&
+ (data->set.httpreq==HTTPREQ_GET) &&
+ (k->httpcode == 416)) {
+ /* "Requested Range Not Satisfiable", just proceed and
+ pretend this is no error */
+ }
+ else {
+ /* serious error, go home! */
+ print_http_error(data);
+ return CURLE_HTTP_RETURNED_ERROR;
+ }
+ }
+
+ if(conn->httpversion == 10) {
+ /* Default action for HTTP/1.0 must be to close, unless
+ we get one of those fancy headers that tell us the
+ server keeps it open for us! */
+ infof(data, "HTTP 1.0, assume close after body\n");
+ connclose(conn, "HTTP/1.0 close after body");
+ }
+ else if(conn->httpversion == 20 ||
+ (k->upgr101 == UPGR101_REQUESTED && k->httpcode == 101)) {
+ /* Don't enable pipelining for HTTP/2 or upgraded connection. For
+ HTTP/2, we do not support multiplexing. In general, requests
+ cannot be pipelined in upgraded connection, since it is now
+ different protocol. */
+ DEBUGF(infof(data,
+ "HTTP 2 or upgraded connection do not support "
+ "pipelining for now\n"));
+ }
+ else if(conn->httpversion >= 11 &&
+ !conn->bits.close) {
+ struct connectbundle *cb_ptr;
+
+ /* If HTTP version is >= 1.1 and connection is persistent
+ server supports pipelining. */
+ DEBUGF(infof(data,
+ "HTTP 1.1 or later with persistent connection, "
+ "pipelining supported\n"));
+ /* Activate pipelining if needed */
+ cb_ptr = conn->bundle;
+ if(cb_ptr) {
+ if(!Curl_pipeline_site_blacklisted(data, conn))
+ cb_ptr->server_supports_pipelining = TRUE;
+ }
+ }
+
+ switch(k->httpcode) {
+ case 204:
+ /* (quote from RFC2616, section 10.2.5): The server has
+ * fulfilled the request but does not need to return an
+ * entity-body ... The 204 response MUST NOT include a
+ * message-body, and thus is always terminated by the first
+ * empty line after the header fields. */
+ /* FALLTHROUGH */
+ case 304:
+ /* (quote from RFC2616, section 10.3.5): The 304 response
+ * MUST NOT contain a message-body, and thus is always
+ * terminated by the first empty line after the header
+ * fields. */
+ if(data->set.timecondition)
+ data->info.timecond = TRUE;
+ k->size=0;
+ k->maxdownload=0;
+ k->ignorecl = TRUE; /* ignore Content-Length headers */
+ break;
+ default:
+ /* nothing */
+ break;
+ }
+ }
+ else {
+ k->header = FALSE; /* this is not a header line */
+ break;
+ }
+ }
+
+ result = Curl_convert_from_network(data, k->p, strlen(k->p));
+ /* Curl_convert_from_network calls failf if unsuccessful */
+ if(result)
+ return result;
+
+ /* Check for Content-Length: header lines to get size */
+ if(!k->ignorecl && !data->set.ignorecl &&
+ checkprefix("Content-Length:", k->p)) {
+ curl_off_t contentlength = curlx_strtoofft(k->p+15, NULL, 10);
+ if(data->set.max_filesize &&
+ contentlength > data->set.max_filesize) {
+ failf(data, "Maximum file size exceeded");
+ return CURLE_FILESIZE_EXCEEDED;
+ }
+ if(contentlength >= 0) {
+ k->size = contentlength;
+ k->maxdownload = k->size;
+ /* we set the progress download size already at this point
+ just to make it easier for apps/callbacks to extract this
+ info as soon as possible */
+ Curl_pgrsSetDownloadSize(data, k->size);
+ }
+ else {
+ /* Negative Content-Length is really odd, and we know it
+ happens for example when older Apache servers send large
+ files */
+ connclose(conn, "negative content-length");
+ infof(data, "Negative content-length: %" CURL_FORMAT_CURL_OFF_T
+ ", closing after transfer\n", contentlength);
+ }
+ }
+ /* check for Content-Type: header lines to get the MIME-type */
+ else if(checkprefix("Content-Type:", k->p)) {
+ char *contenttype = Curl_copy_header_value(k->p);
+ if(!contenttype)
+ return CURLE_OUT_OF_MEMORY;
+ if(!*contenttype)
+ /* ignore empty data */
+ free(contenttype);
+ else {
+ Curl_safefree(data->info.contenttype);
+ data->info.contenttype = contenttype;
+ }
+ }
+ else if(checkprefix("Server:", k->p)) {
+ char *server_name = Curl_copy_header_value(k->p);
+
+ /* Turn off pipelining if the server version is blacklisted */
+ if(conn->bundle && conn->bundle->server_supports_pipelining) {
+ if(Curl_pipeline_server_blacklisted(data, server_name))
+ conn->bundle->server_supports_pipelining = FALSE;
+ }
+ free(server_name);
+ }
+ else if((conn->httpversion == 10) &&
+ conn->bits.httpproxy &&
+ Curl_compareheader(k->p,
+ "Proxy-Connection:", "keep-alive")) {
+ /*
+ * When a HTTP/1.0 reply comes when using a proxy, the
+ * 'Proxy-Connection: keep-alive' line tells us the
+ * connection will be kept alive for our pleasure.
+ * Default action for 1.0 is to close.
+ */
+ connkeep(conn, "Proxy-Connection keep-alive"); /* don't close */
+ infof(data, "HTTP/1.0 proxy connection set to keep alive!\n");
+ }
+ else if((conn->httpversion == 11) &&
+ conn->bits.httpproxy &&
+ Curl_compareheader(k->p,
+ "Proxy-Connection:", "close")) {
+ /*
+ * We get a HTTP/1.1 response from a proxy and it says it'll
+ * close down after this transfer.
+ */
+ connclose(conn, "Proxy-Connection: asked to close after done");
+ infof(data, "HTTP/1.1 proxy connection set close!\n");
+ }
+ else if((conn->httpversion == 10) &&
+ Curl_compareheader(k->p, "Connection:", "keep-alive")) {
+ /*
+ * A HTTP/1.0 reply with the 'Connection: keep-alive' line
+ * tells us the connection will be kept alive for our
+ * pleasure. Default action for 1.0 is to close.
+ *
+ * [RFC2068, section 19.7.1] */
+ connkeep(conn, "Connection keep-alive");
+ infof(data, "HTTP/1.0 connection set to keep alive!\n");
+ }
+ else if(Curl_compareheader(k->p, "Connection:", "close")) {
+ /*
+ * [RFC 2616, section 8.1.2.1]
+ * "Connection: close" is HTTP/1.1 language and means that
+ * the connection will close when this request has been
+ * served.
+ */
+ connclose(conn, "Connection: close used");
+ }
+ else if(checkprefix("Transfer-Encoding:", k->p)) {
+ /* One or more encodings. We check for chunked and/or a compression
+ algorithm. */
+ /*
+ * [RFC 2616, section 3.6.1] A 'chunked' transfer encoding
+ * means that the server will send a series of "chunks". Each
+ * chunk starts with line with info (including size of the
+ * coming block) (terminated with CRLF), then a block of data
+ * with the previously mentioned size. There can be any amount
+ * of chunks, and a chunk-data set to zero signals the
+ * end-of-chunks. */
+
+ char *start;
+
+ /* Find the first non-space letter */
+ start = k->p + 18;
+
+ for(;;) {
+ /* skip whitespaces and commas */
+ while(*start && (ISSPACE(*start) || (*start == ',')))
+ start++;
+
+ if(checkprefix("chunked", start)) {
+ k->chunk = TRUE; /* chunks coming our way */
+
+ /* init our chunky engine */
+ Curl_httpchunk_init(conn);
+
+ start += 7;
+ }
+
+ if(k->auto_decoding)
+ /* TODO: we only support the first mentioned compression for now */
+ break;
+
+ if(checkprefix("identity", start)) {
+ k->auto_decoding = IDENTITY;
+ start += 8;
+ }
+ else if(checkprefix("deflate", start)) {
+ k->auto_decoding = DEFLATE;
+ start += 7;
+ }
+ else if(checkprefix("gzip", start)) {
+ k->auto_decoding = GZIP;
+ start += 4;
+ }
+ else if(checkprefix("x-gzip", start)) {
+ k->auto_decoding = GZIP;
+ start += 6;
+ }
+ else if(checkprefix("compress", start)) {
+ k->auto_decoding = COMPRESS;
+ start += 8;
+ }
+ else if(checkprefix("x-compress", start)) {
+ k->auto_decoding = COMPRESS;
+ start += 10;
+ }
+ else
+ /* unknown! */
+ break;
+
+ }
+
+ }
+ else if(checkprefix("Content-Encoding:", k->p) &&
+ (data->set.str[STRING_ENCODING] ||
+ conn->httpversion == 20)) {
+ /*
+ * Process Content-Encoding. Look for the values: identity,
+ * gzip, deflate, compress, x-gzip and x-compress. x-gzip and
+ * x-compress are the same as gzip and compress. (Sec 3.5 RFC
+ * 2616). zlib cannot handle compress. However, errors are
+ * handled further down when the response body is processed
+ */
+ char *start;
+
+ /* Find the first non-space letter */
+ start = k->p + 17;
+ while(*start && ISSPACE(*start))
+ start++;
+
+ /* Record the content-encoding for later use */
+ if(checkprefix("identity", start))
+ k->auto_decoding = IDENTITY;
+ else if(checkprefix("deflate", start))
+ k->auto_decoding = DEFLATE;
+ else if(checkprefix("gzip", start)
+ || checkprefix("x-gzip", start))
+ k->auto_decoding = GZIP;
+ else if(checkprefix("compress", start)
+ || checkprefix("x-compress", start))
+ k->auto_decoding = COMPRESS;
+ }
+ else if(checkprefix("Content-Range:", k->p)) {
+ /* Content-Range: bytes [num]-
+ Content-Range: bytes: [num]-
+ Content-Range: [num]-
+ Content-Range: [asterisk]/[total]
+
+ The second format was added since Sun's webserver
+ JavaWebServer/1.1.1 obviously sends the header this way!
+ The third added since some servers use that!
+ The forth means the requested range was unsatisfied.
+ */
+
+ char *ptr = k->p + 14;
+
+ /* Move forward until first digit or asterisk */
+ while(*ptr && !ISDIGIT(*ptr) && *ptr != '*')
+ ptr++;
+
+ /* if it truly stopped on a digit */
+ if(ISDIGIT(*ptr)) {
+ k->offset = curlx_strtoofft(ptr, NULL, 10);
+
+ if(data->state.resume_from == k->offset)
+ /* we asked for a resume and we got it */
+ k->content_range = TRUE;
+ }
+ else
+ data->state.resume_from = 0; /* get everything */
+ }
+#if !defined(CURL_DISABLE_COOKIES)
+ else if(data->cookies &&
+ checkprefix("Set-Cookie:", k->p)) {
+ Curl_share_lock(data, CURL_LOCK_DATA_COOKIE,
+ CURL_LOCK_ACCESS_SINGLE);
+ Curl_cookie_add(data,
+ data->cookies, TRUE, k->p+11,
+ /* If there is a custom-set Host: name, use it
+ here, or else use real peer host name. */
+ conn->allocptr.cookiehost?
+ conn->allocptr.cookiehost:conn->host.name,
+ data->state.path);
+ Curl_share_unlock(data, CURL_LOCK_DATA_COOKIE);
+ }
+#endif
+ else if(checkprefix("Last-Modified:", k->p) &&
+ (data->set.timecondition || data->set.get_filetime) ) {
+ time_t secs=time(NULL);
+ k->timeofdoc = curl_getdate(k->p+strlen("Last-Modified:"),
+ &secs);
+ if(data->set.get_filetime)
+ data->info.filetime = (long)k->timeofdoc;
+ }
+ else if((checkprefix("WWW-Authenticate:", k->p) &&
+ (401 == k->httpcode)) ||
+ (checkprefix("Proxy-authenticate:", k->p) &&
+ (407 == k->httpcode))) {
+
+ bool proxy = (k->httpcode == 407) ? TRUE : FALSE;
+ char *auth = Curl_copy_header_value(k->p);
+ if(!auth)
+ return CURLE_OUT_OF_MEMORY;
+
+ result = Curl_http_input_auth(conn, proxy, auth);
+
+ free(auth);
+
+ if(result)
+ return result;
+ }
+ else if((k->httpcode >= 300 && k->httpcode < 400) &&
+ checkprefix("Location:", k->p) &&
+ !data->req.location) {
+ /* this is the URL that the server advises us to use instead */
+ char *location = Curl_copy_header_value(k->p);
+ if(!location)
+ return CURLE_OUT_OF_MEMORY;
+ if(!*location)
+ /* ignore empty data */
+ free(location);
+ else {
+ data->req.location = location;
+
+ if(data->set.http_follow_location) {
+ DEBUGASSERT(!data->req.newurl);
+ data->req.newurl = strdup(data->req.location); /* clone */
+ if(!data->req.newurl)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* some cases of POST and PUT etc needs to rewind the data
+ stream at this point */
+ result = http_perhapsrewind(conn);
+ if(result)
+ return result;
+ }
+ }
+ }
+ else if(conn->handler->protocol & CURLPROTO_RTSP) {
+ result = Curl_rtsp_parseheader(conn, k->p);
+ if(result)
+ return result;
+ }
+
+ /*
+ * End of header-checks. Write them to the client.
+ */
+
+ writetype = CLIENTWRITE_HEADER;
+ if(data->set.include_header)
+ writetype |= CLIENTWRITE_BODY;
+
+ if(data->set.verbose)
+ Curl_debug(data, CURLINFO_HEADER_IN,
+ k->p, (size_t)k->hbuflen, conn);
+
+ result = Curl_client_write(conn, writetype, k->p, k->hbuflen);
+ if(result)
+ return result;
+
+ data->info.header_size += (long)k->hbuflen;
+ data->req.headerbytecount += (long)k->hbuflen;
+
+ /* reset hbufp pointer && hbuflen */
+ k->hbufp = data->state.headerbuff;
+ k->hbuflen = 0;
+ }
+ while(!*stop_reading && *k->str); /* header line within buffer */
+
+ /* We might have reached the end of the header part here, but
+ there might be a non-header part left in the end of the read
+ buffer. */
+
+ return CURLE_OK;
+}
+
+#endif /* CURL_DISABLE_HTTP */
|