diff options
Diffstat (limited to 'libcurl/src/lib/transfer.c')
| -rw-r--r-- | libcurl/src/lib/transfer.c | 2004 |
1 files changed, 0 insertions, 2004 deletions
diff --git a/libcurl/src/lib/transfer.c b/libcurl/src/lib/transfer.c deleted file mode 100644 index 227dc83..0000000 --- a/libcurl/src/lib/transfer.c +++ /dev/null @@ -1,2004 +0,0 @@ -/***************************************************************************
- * _ _ ____ _
- * 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"
-
-#include "strtoofft.h"
-#include "strequal.h"
-#include "rawstr.h"
-
-#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_SIGNAL_H
-#include <signal.h>
-#endif
-
-#ifdef HAVE_SYS_PARAM_H
-#include <sys/param.h>
-#endif
-
-#ifdef HAVE_SYS_SELECT_H
-#include <sys/select.h>
-#endif
-
-#ifndef HAVE_SOCKET
-#error "We can't compile without socket() support!"
-#endif
-
-#include "urldata.h"
-#include <curl/curl.h>
-#include "netrc.h"
-
-#include "content_encoding.h"
-#include "hostip.h"
-#include "transfer.h"
-#include "sendf.h"
-#include "speedcheck.h"
-#include "progress.h"
-#include "http.h"
-#include "url.h"
-#include "getinfo.h"
-#include "vtls/vtls.h"
-#include "http_digest.h"
-#include "curl_ntlm.h"
-#include "http_negotiate.h"
-#include "share.h"
-#include "select.h"
-#include "multiif.h"
-#include "connect.h"
-#include "non-ascii.h"
-#include "curl_printf.h"
-
-/* The last #include files should be: */
-#include "curl_memory.h"
-#include "memdebug.h"
-
-/*
- * This function will call the read callback to fill our buffer with data
- * to upload.
- */
-CURL_STATIC CURLcode Curl_fillreadbuffer(struct connectdata *conn, int bytes, int *nreadp)
-{
- struct SessionHandle *data = conn->data;
- size_t buffersize = (size_t)bytes;
- int nread;
-#ifdef CURL_DOES_CONVERSIONS
- bool sending_http_headers = FALSE;
-
- if(conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_RTSP)) {
- const struct HTTP *http = data->req.protop;
-
- if(http->sending == HTTPSEND_REQUEST)
- /* We're sending the HTTP request headers, not the data.
- Remember that so we don't re-translate them into garbage. */
- sending_http_headers = TRUE;
- }
-#endif
-
- if(data->req.upload_chunky) {
- /* if chunked Transfer-Encoding */
- buffersize -= (8 + 2 + 2); /* 32bit hex + CRLF + CRLF */
- data->req.upload_fromhere += (8 + 2); /* 32bit hex + CRLF */
- }
-
- /* this function returns a size_t, so we typecast to int to prevent warnings
- with picky compilers */
- nread = (int)conn->fread_func(data->req.upload_fromhere, 1,
- buffersize, conn->fread_in);
-
- if(nread == CURL_READFUNC_ABORT) {
- failf(data, "operation aborted by callback");
- *nreadp = 0;
- return CURLE_ABORTED_BY_CALLBACK;
- }
- else if(nread == CURL_READFUNC_PAUSE) {
-
- if(conn->handler->flags & PROTOPT_NONETWORK) {
- /* protocols that work without network cannot be paused. This is
- actually only FILE:// just now, and it can't pause since the transfer
- isn't done using the "normal" procedure. */
- failf(data, "Read callback asked for PAUSE when not supported!");
- return CURLE_READ_ERROR;
- }
- else {
- struct SingleRequest *k = &data->req;
- /* CURL_READFUNC_PAUSE pauses read callbacks that feed socket writes */
- k->keepon |= KEEP_SEND_PAUSE; /* mark socket send as paused */
- if(data->req.upload_chunky) {
- /* Back out the preallocation done above */
- data->req.upload_fromhere -= (8 + 2);
- }
- *nreadp = 0;
- }
- return CURLE_OK; /* nothing was read */
- }
- else if((size_t)nread > buffersize) {
- /* the read function returned a too large value */
- *nreadp = 0;
- failf(data, "read function returned funny value");
- return CURLE_READ_ERROR;
- }
-
- if(!data->req.forbidchunk && data->req.upload_chunky) {
- /* if chunked Transfer-Encoding
- * build chunk:
- *
- * <HEX SIZE> CRLF
- * <DATA> CRLF
- */
- /* On non-ASCII platforms the <DATA> may or may not be
- translated based on set.prefer_ascii while the protocol
- portion must always be translated to the network encoding.
- To further complicate matters, line end conversion might be
- done later on, so we need to prevent CRLFs from becoming
- CRCRLFs if that's the case. To do this we use bare LFs
- here, knowing they'll become CRLFs later on.
- */
-
- char hexbuffer[11];
- const char *endofline_native;
- const char *endofline_network;
- int hexlen;
-
- if(
-#ifdef CURL_DO_LINEEND_CONV
- (data->set.prefer_ascii) ||
-#endif
- (data->set.crlf)) {
- /* \n will become \r\n later on */
- endofline_native = "\n";
- endofline_network = "\x0a";
- }
- else {
- endofline_native = "\r\n";
- endofline_network = "\x0d\x0a";
- }
- hexlen = snprintf(hexbuffer, sizeof(hexbuffer),
- "%x%s", nread, endofline_native);
-
- /* move buffer pointer */
- data->req.upload_fromhere -= hexlen;
- nread += hexlen;
-
- /* copy the prefix to the buffer, leaving out the NUL */
- memcpy(data->req.upload_fromhere, hexbuffer, hexlen);
-
- /* always append ASCII CRLF to the data */
- memcpy(data->req.upload_fromhere + nread,
- endofline_network,
- strlen(endofline_network));
-
-#ifdef CURL_DOES_CONVERSIONS
- CURLcode result;
- int length;
- if(data->set.prefer_ascii) {
- /* translate the protocol and data */
- length = nread;
- }
- else {
- /* just translate the protocol portion */
- length = strlen(hexbuffer);
- }
- result = Curl_convert_to_network(data, data->req.upload_fromhere, length);
- /* Curl_convert_to_network calls failf if unsuccessful */
- if(result)
- return result;
-#endif /* CURL_DOES_CONVERSIONS */
-
- if((nread - hexlen) == 0)
- /* mark this as done once this chunk is transferred */
- data->req.upload_done = TRUE;
-
- nread+=(int)strlen(endofline_native); /* for the added end of line */
- }
-#ifdef CURL_DOES_CONVERSIONS
- else if((data->set.prefer_ascii) && (!sending_http_headers)) {
- CURLcode result;
- result = Curl_convert_to_network(data, data->req.upload_fromhere, nread);
- /* Curl_convert_to_network calls failf if unsuccessful */
- if(result)
- return result;
- }
-#endif /* CURL_DOES_CONVERSIONS */
-
- *nreadp = nread;
-
- return CURLE_OK;
-}
-
-
-/*
- * Curl_readrewind() rewinds the read stream. This is typically used for HTTP
- * POST/PUT with multi-pass authentication when a sending was denied and a
- * resend is necessary.
- */
-CURL_STATIC CURLcode Curl_readrewind(struct connectdata *conn)
-{
- struct SessionHandle *data = conn->data;
-
- conn->bits.rewindaftersend = FALSE; /* we rewind now */
-
- /* explicitly switch off sending data on this connection now since we are
- about to restart a new transfer and thus we want to avoid inadvertently
- sending more data on the existing connection until the next transfer
- starts */
- data->req.keepon &= ~KEEP_SEND;
-
- /* We have sent away data. If not using CURLOPT_POSTFIELDS or
- CURLOPT_HTTPPOST, call app to rewind
- */
- if(data->set.postfields ||
- (data->set.httpreq == HTTPREQ_POST_FORM))
- ; /* do nothing */
- else {
- if(data->set.seek_func) {
- int err;
-
- err = (data->set.seek_func)(data->set.seek_client, 0, SEEK_SET);
- if(err) {
- failf(data, "seek callback returned error %d", (int)err);
- return CURLE_SEND_FAIL_REWIND;
- }
- }
- else if(data->set.ioctl_func) {
- curlioerr err;
-
- err = (data->set.ioctl_func)(data, CURLIOCMD_RESTARTREAD,
- data->set.ioctl_client);
- infof(data, "the ioctl callback returned %d\n", (int)err);
-
- if(err) {
- /* FIXME: convert to a human readable error message */
- failf(data, "ioctl callback returned error %d", (int)err);
- return CURLE_SEND_FAIL_REWIND;
- }
- }
- else {
- /* If no CURLOPT_READFUNCTION is used, we know that we operate on a
- given FILE * stream and we can actually attempt to rewind that
- ourselves with fseek() */
- if(data->set.fread_func == (curl_read_callback)fread) {
- if(-1 != fseek(data->set.in, 0, SEEK_SET))
- /* successful rewind */
- return CURLE_OK;
- }
-
- /* no callback set or failure above, makes us fail at once */
- failf(data, "necessary data rewind wasn't possible");
- return CURLE_SEND_FAIL_REWIND;
- }
- }
- return CURLE_OK;
-}
-
-static int data_pending(const struct connectdata *conn)
-{
- /* in the case of libssh2, we can never be really sure that we have emptied
- its internal buffers so we MUST always try until we get EAGAIN back */
- return conn->handler->protocol&(CURLPROTO_SCP|CURLPROTO_SFTP) ||
-#if defined(USE_NGHTTP2)
- Curl_ssl_data_pending(conn, FIRSTSOCKET) ||
- /* For HTTP/2, we may read up everything including responde body
- with header fields in Curl_http_readwrite_headers. If no
- content-length is provided, curl waits for the connection
- close, which we emulate it using conn->proto.httpc.closed =
- TRUE. The thing is if we read everything, then http2_recv won't
- be called and we cannot signal the HTTP/2 stream has closed. As
- a workaround, we return nonzero here to call http2_recv. */
- ((conn->handler->protocol&PROTO_FAMILY_HTTP) && conn->httpversion == 20 &&
- conn->proto.httpc.closed);
-#else
- Curl_ssl_data_pending(conn, FIRSTSOCKET);
-#endif
-}
-
-static void read_rewind(struct connectdata *conn,
- size_t thismuch)
-{
- DEBUGASSERT(conn->read_pos >= thismuch);
-
- conn->read_pos -= thismuch;
- conn->bits.stream_was_rewound = TRUE;
-
-#ifdef DEBUGBUILD
- {
- char buf[512 + 1];
- size_t show;
-
- show = CURLMIN(conn->buf_len - conn->read_pos, sizeof(buf)-1);
- if(conn->master_buffer) {
- memcpy(buf, conn->master_buffer + conn->read_pos, show);
- buf[show] = '\0';
- }
- else {
- buf[0] = '\0';
- }
-
- DEBUGF(infof(conn->data,
- "Buffer after stream rewind (read_pos = %zu): [%s]\n",
- conn->read_pos, buf));
- }
-#endif
-}
-
-/*
- * Check to see if CURLOPT_TIMECONDITION was met by comparing the time of the
- * remote document with the time provided by CURLOPT_TIMEVAL
- */
-CURL_STATIC bool Curl_meets_timecondition(struct SessionHandle *data, time_t timeofdoc)
-{
- if((timeofdoc == 0) || (data->set.timevalue == 0))
- return TRUE;
-
- switch(data->set.timecondition) {
- case CURL_TIMECOND_IFMODSINCE:
- default:
- if(timeofdoc <= data->set.timevalue) {
- infof(data,
- "The requested document is not new enough\n");
- data->info.timecond = TRUE;
- return FALSE;
- }
- break;
- case CURL_TIMECOND_IFUNMODSINCE:
- if(timeofdoc >= data->set.timevalue) {
- infof(data,
- "The requested document is not old enough\n");
- data->info.timecond = TRUE;
- return FALSE;
- }
- break;
- }
-
- return TRUE;
-}
-
-/*
- * Go ahead and do a read if we have a readable socket or if
- * the stream was rewound (in which case we have data in a
- * buffer)
- */
-static CURLcode readwrite_data(struct SessionHandle *data,
- struct connectdata *conn,
- struct SingleRequest *k,
- int *didwhat, bool *done)
-{
- CURLcode result = CURLE_OK;
- ssize_t nread; /* number of bytes read */
- size_t excess = 0; /* excess bytes read */
- bool is_empty_data = FALSE;
- bool readmore = FALSE; /* used by RTP to signal for more data */
-
- *done = FALSE;
-
- /* This is where we loop until we have read everything there is to
- read or we get a CURLE_AGAIN */
- do {
- size_t buffersize = data->set.buffer_size?
- data->set.buffer_size : BUFSIZE;
- size_t bytestoread = buffersize;
-
- if(k->size != -1 && !k->header) {
- /* make sure we don't read "too much" if we can help it since we
- might be pipelining and then someone else might want to read what
- follows! */
- curl_off_t totalleft = k->size - k->bytecount;
- if(totalleft < (curl_off_t)bytestoread)
- bytestoread = (size_t)totalleft;
- }
-
- if(bytestoread) {
- /* receive data from the network! */
- result = Curl_read(conn, conn->sockfd, k->buf, bytestoread, &nread);
-
- /* read would've blocked */
- if(CURLE_AGAIN == result)
- break; /* get out of loop */
-
- if(result>0)
- return result;
- }
- else {
- /* read nothing but since we wanted nothing we consider this an OK
- situation to proceed from */
- nread = 0;
- }
-
- if((k->bytecount == 0) && (k->writebytecount == 0)) {
- Curl_pgrsTime(data, TIMER_STARTTRANSFER);
- if(k->exp100 > EXP100_SEND_DATA)
- /* set time stamp to compare with when waiting for the 100 */
- k->start100 = Curl_tvnow();
- }
-
- *didwhat |= KEEP_RECV;
- /* indicates data of zero size, i.e. empty file */
- is_empty_data = ((nread == 0) && (k->bodywrites == 0)) ? TRUE : FALSE;
-
- /* NUL terminate, allowing string ops to be used */
- if(0 < nread || is_empty_data) {
- k->buf[nread] = 0;
- }
- else if(0 >= nread) {
- /* if we receive 0 or less here, the server closed the connection
- and we bail out from this! */
- DEBUGF(infof(data, "nread <= 0, server closed connection, bailing\n"));
- k->keepon &= ~KEEP_RECV;
- break;
- }
-
- /* Default buffer to use when we write the buffer, it may be changed
- in the flow below before the actual storing is done. */
- k->str = k->buf;
-
- if(conn->handler->readwrite) {
- result = conn->handler->readwrite(data, conn, &nread, &readmore);
- if(result)
- return result;
- if(readmore)
- break;
- }
-
-#ifndef CURL_DISABLE_HTTP
- /* Since this is a two-state thing, we check if we are parsing
- headers at the moment or not. */
- if(k->header) {
- /* we are in parse-the-header-mode */
- bool stop_reading = FALSE;
- result = Curl_http_readwrite_headers(data, conn, &nread, &stop_reading);
- if(result)
- return result;
-
- if(conn->handler->readwrite &&
- (k->maxdownload <= 0 && nread > 0)) {
- result = conn->handler->readwrite(data, conn, &nread, &readmore);
- if(result)
- return result;
- if(readmore)
- break;
- }
-
- if(stop_reading) {
- /* We've stopped dealing with input, get out of the do-while loop */
-
- if(nread > 0) {
- if(Curl_multi_pipeline_enabled(conn->data->multi)) {
- infof(data,
- "Rewinding stream by : %zd"
- " bytes on url %s (zero-length body)\n",
- nread, data->state.path);
- read_rewind(conn, (size_t)nread);
- }
- else {
- infof(data,
- "Excess found in a non pipelined read:"
- " excess = %zd"
- " url = %s (zero-length body)\n",
- nread, data->state.path);
- }
- }
-
- break;
- }
- }
-#endif /* CURL_DISABLE_HTTP */
-
-
- /* This is not an 'else if' since it may be a rest from the header
- parsing, where the beginning of the buffer is headers and the end
- is non-headers. */
- if(k->str && !k->header && (nread > 0 || is_empty_data)) {
-
-#ifndef CURL_DISABLE_HTTP
- if(0 == k->bodywrites && !is_empty_data) {
- /* These checks are only made the first time we are about to
- write a piece of the body */
- if(conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_RTSP)) {
- /* HTTP-only checks */
-
- if(data->req.newurl) {
- if(conn->bits.close) {
- /* Abort after the headers if "follow Location" is set
- and we're set to close anyway. */
- k->keepon &= ~KEEP_RECV;
- *done = TRUE;
- return CURLE_OK;
- }
- /* We have a new url to load, but since we want to be able
- to re-use this connection properly, we read the full
- response in "ignore more" */
- k->ignorebody = TRUE;
- infof(data, "Ignoring the response-body\n");
- }
- if(data->state.resume_from && !k->content_range &&
- (data->set.httpreq==HTTPREQ_GET) &&
- !k->ignorebody) {
-
- if(k->size == data->state.resume_from) {
- /* The resume point is at the end of file, consider this fine
- even if it doesn't allow resume from here. */
- infof(data, "The entire document is already downloaded");
- connclose(conn, "already downloaded");
- /* Abort download */
- k->keepon &= ~KEEP_RECV;
- *done = TRUE;
- return CURLE_OK;
- }
-
- /* we wanted to resume a download, although the server doesn't
- * seem to support this and we did this with a GET (if it
- * wasn't a GET we did a POST or PUT resume) */
- failf(data, "HTTP server doesn't seem to support "
- "byte ranges. Cannot resume.");
- return CURLE_RANGE_ERROR;
- }
-
- if(data->set.timecondition && !data->state.range) {
- /* A time condition has been set AND no ranges have been
- requested. This seems to be what chapter 13.3.4 of
- RFC 2616 defines to be the correct action for a
- HTTP/1.1 client */
-
- if(!Curl_meets_timecondition(data, k->timeofdoc)) {
- *done = TRUE;
- /* We're simulating a http 304 from server so we return
- what should have been returned from the server */
- data->info.httpcode = 304;
- infof(data, "Simulate a HTTP 304 response!\n");
- /* we abort the transfer before it is completed == we ruin the
- re-use ability. Close the connection */
- connclose(conn, "Simulated 304 handling");
- return CURLE_OK;
- }
- } /* we have a time condition */
-
- } /* this is HTTP or RTSP */
- } /* this is the first time we write a body part */
-#endif /* CURL_DISABLE_HTTP */
-
- k->bodywrites++;
-
- /* pass data to the debug function before it gets "dechunked" */
- if(data->set.verbose) {
- if(k->badheader) {
- Curl_debug(data, CURLINFO_DATA_IN, data->state.headerbuff,
- (size_t)k->hbuflen, conn);
- if(k->badheader == HEADER_PARTHEADER)
- Curl_debug(data, CURLINFO_DATA_IN,
- k->str, (size_t)nread, conn);
- }
- else
- Curl_debug(data, CURLINFO_DATA_IN,
- k->str, (size_t)nread, conn);
- }
-
-#ifndef CURL_DISABLE_HTTP
- if(k->chunk) {
- /*
- * Here comes a chunked transfer flying and we need to decode this
- * properly. While the name says read, this function both reads
- * and writes away the data. The returned 'nread' holds the number
- * of actual data it wrote to the client.
- */
-
- CHUNKcode res =
- Curl_httpchunk_read(conn, k->str, nread, &nread);
-
- if(CHUNKE_OK < res) {
- if(CHUNKE_WRITE_ERROR == res) {
- failf(data, "Failed writing data");
- return CURLE_WRITE_ERROR;
- }
- failf(data, "%s in chunked-encoding", Curl_chunked_strerror(res));
- return CURLE_RECV_ERROR;
- }
- else if(CHUNKE_STOP == res) {
- size_t dataleft;
- /* we're done reading chunks! */
- k->keepon &= ~KEEP_RECV; /* read no more */
-
- /* There are now possibly N number of bytes at the end of the
- str buffer that weren't written to the client.
-
- We DO care about this data if we are pipelining.
- Push it back to be read on the next pass. */
-
- dataleft = conn->chunk.dataleft;
- if(dataleft != 0) {
- infof(conn->data, "Leftovers after chunking: %zu bytes\n",
- dataleft);
- if(Curl_multi_pipeline_enabled(conn->data->multi)) {
- /* only attempt the rewind if we truly are pipelining */
- infof(conn->data, "Rewinding %zu bytes\n",dataleft);
- read_rewind(conn, dataleft);
- }
- }
- }
- /* If it returned OK, we just keep going */
- }
-#endif /* CURL_DISABLE_HTTP */
-
- /* Account for body content stored in the header buffer */
- if(k->badheader && !k->ignorebody) {
- DEBUGF(infof(data, "Increasing bytecount by %zu from hbuflen\n",
- k->hbuflen));
- k->bytecount += k->hbuflen;
- }
-
- if((-1 != k->maxdownload) &&
- (k->bytecount + nread >= k->maxdownload)) {
-
- excess = (size_t)(k->bytecount + nread - k->maxdownload);
- if(excess > 0 && !k->ignorebody) {
- if(Curl_multi_pipeline_enabled(conn->data->multi)) {
- /* The 'excess' amount below can't be more than BUFSIZE which
- always will fit in a size_t */
- infof(data,
- "Rewinding stream by : %zu"
- " bytes on url %s (size = %" CURL_FORMAT_CURL_OFF_T
- ", maxdownload = %" CURL_FORMAT_CURL_OFF_T
- ", bytecount = %" CURL_FORMAT_CURL_OFF_T ", nread = %zd)\n",
- excess, data->state.path,
- k->size, k->maxdownload, k->bytecount, nread);
- read_rewind(conn, excess);
- }
- else {
- infof(data,
- "Excess found in a non pipelined read:"
- " excess = %zu"
- ", size = %" CURL_FORMAT_CURL_OFF_T
- ", maxdownload = %" CURL_FORMAT_CURL_OFF_T
- ", bytecount = %" CURL_FORMAT_CURL_OFF_T "\n",
- excess, k->size, k->maxdownload, k->bytecount);
- }
- }
-
- nread = (ssize_t) (k->maxdownload - k->bytecount);
- if(nread < 0 ) /* this should be unusual */
- nread = 0;
-
- k->keepon &= ~KEEP_RECV; /* we're done reading */
- }
-
- k->bytecount += nread;
-
- Curl_pgrsSetDownloadCounter(data, k->bytecount);
-
- if(!k->chunk && (nread || k->badheader || is_empty_data)) {
- /* If this is chunky transfer, it was already written */
-
- if(k->badheader && !k->ignorebody) {
- /* we parsed a piece of data wrongly assuming it was a header
- and now we output it as body instead */
-
- /* Don't let excess data pollute body writes */
- if(k->maxdownload == -1 || (curl_off_t)k->hbuflen <= k->maxdownload)
- result = Curl_client_write(conn, CLIENTWRITE_BODY,
- data->state.headerbuff,
- k->hbuflen);
- else
- result = Curl_client_write(conn, CLIENTWRITE_BODY,
- data->state.headerbuff,
- (size_t)k->maxdownload);
-
- if(result)
- return result;
- }
- if(k->badheader < HEADER_ALLBAD) {
- /* This switch handles various content encodings. If there's an
- error here, be sure to check over the almost identical code
- in http_chunks.c.
- Make sure that ALL_CONTENT_ENCODINGS contains all the
- encodings handled here. */
-#ifdef HAVE_LIBZ
- switch (conn->data->set.http_ce_skip ?
- IDENTITY : k->auto_decoding) {
- case IDENTITY:
-#endif
- /* This is the default when the server sends no
- Content-Encoding header. See Curl_readwrite_init; the
- memset() call initializes k->auto_decoding to zero. */
- if(!k->ignorebody) {
-
-#ifndef CURL_DISABLE_POP3
- if(conn->handler->protocol&PROTO_FAMILY_POP3)
- result = Curl_pop3_write(conn, k->str, nread);
- else
-#endif /* CURL_DISABLE_POP3 */
-
- result = Curl_client_write(conn, CLIENTWRITE_BODY, k->str,
- nread);
- }
-#ifdef HAVE_LIBZ
- break;
-
- case DEFLATE:
- /* Assume CLIENTWRITE_BODY; headers are not encoded. */
- if(!k->ignorebody)
- result = Curl_unencode_deflate_write(conn, k, nread);
- break;
-
- case GZIP:
- /* Assume CLIENTWRITE_BODY; headers are not encoded. */
- if(!k->ignorebody)
- result = Curl_unencode_gzip_write(conn, k, nread);
- break;
-
- case COMPRESS:
- default:
- failf (data, "Unrecognized content encoding type. "
- "libcurl understands `identity', `deflate' and `gzip' "
- "content encodings.");
- result = CURLE_BAD_CONTENT_ENCODING;
- break;
- }
-#endif
- }
- k->badheader = HEADER_NORMAL; /* taken care of now */
-
- if(result)
- return result;
- }
-
- } /* if(! header and data to read ) */
-
- if(conn->handler->readwrite &&
- (excess > 0 && !conn->bits.stream_was_rewound)) {
- /* Parse the excess data */
- k->str += nread;
- nread = (ssize_t)excess;
-
- result = conn->handler->readwrite(data, conn, &nread, &readmore);
- if(result)
- return result;
-
- if(readmore)
- k->keepon |= KEEP_RECV; /* we're not done reading */
- break;
- }
-
- if(is_empty_data) {
- /* if we received nothing, the server closed the connection and we
- are done */
- k->keepon &= ~KEEP_RECV;
- }
-
- } while(data_pending(conn));
-
- if(((k->keepon & (KEEP_RECV|KEEP_SEND)) == KEEP_SEND) &&
- conn->bits.close ) {
- /* When we've read the entire thing and the close bit is set, the server
- may now close the connection. If there's now any kind of sending going
- on from our side, we need to stop that immediately. */
- infof(data, "we are done reading and this is set to close, stop send\n");
- k->keepon &= ~KEEP_SEND; /* no writing anymore either */
- }
-
- return CURLE_OK;
-}
-
-/*
- * Send data to upload to the server, when the socket is writable.
- */
-static CURLcode readwrite_upload(struct SessionHandle *data,
- struct connectdata *conn,
- struct SingleRequest *k,
- int *didwhat)
-{
- ssize_t i, si;
- ssize_t bytes_written;
- CURLcode result;
- ssize_t nread; /* number of bytes read */
- bool sending_http_headers = FALSE;
-
- if((k->bytecount == 0) && (k->writebytecount == 0))
- Curl_pgrsTime(data, TIMER_STARTTRANSFER);
-
- *didwhat |= KEEP_SEND;
-
- /*
- * We loop here to do the READ and SEND loop until we run out of
- * data to send or until we get EWOULDBLOCK back
- *
- * FIXME: above comment is misleading. Currently no looping is
- * actually done in do-while loop below.
- */
- do {
-
- /* only read more data if there's no upload data already
- present in the upload buffer */
- if(0 == data->req.upload_present) {
- /* init the "upload from here" pointer */
- data->req.upload_fromhere = k->uploadbuf;
-
- if(!k->upload_done) {
- /* HTTP pollution, this should be written nicer to become more
- protocol agnostic. */
- int fillcount;
- struct HTTP *http = data->req.protop;
-
- if((k->exp100 == EXP100_SENDING_REQUEST) &&
- (http->sending == HTTPSEND_BODY)) {
- /* If this call is to send body data, we must take some action:
- We have sent off the full HTTP 1.1 request, and we shall now
- go into the Expect: 100 state and await such a header */
- k->exp100 = EXP100_AWAITING_CONTINUE; /* wait for the header */
- k->keepon &= ~KEEP_SEND; /* disable writing */
- k->start100 = Curl_tvnow(); /* timeout count starts now */
- *didwhat &= ~KEEP_SEND; /* we didn't write anything actually */
-
- /* set a timeout for the multi interface */
- Curl_expire(data, data->set.expect_100_timeout);
- break;
- }
-
- if(conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_RTSP)) {
- if(http->sending == HTTPSEND_REQUEST)
- /* We're sending the HTTP request headers, not the data.
- Remember that so we don't change the line endings. */
- sending_http_headers = TRUE;
- else
- sending_http_headers = FALSE;
- }
-
- result = Curl_fillreadbuffer(conn, BUFSIZE, &fillcount);
- if(result)
- return result;
-
- nread = (ssize_t)fillcount;
- }
- else
- nread = 0; /* we're done uploading/reading */
-
- if(!nread && (k->keepon & KEEP_SEND_PAUSE)) {
- /* this is a paused transfer */
- break;
- }
- else if(nread<=0) {
- /* done */
- k->keepon &= ~KEEP_SEND; /* we're done writing */
-
- if(conn->bits.rewindaftersend) {
- result = Curl_readrewind(conn);
- if(result)
- return result;
- }
- break;
- }
-
- /* store number of bytes available for upload */
- data->req.upload_present = nread;
-
- /* convert LF to CRLF if so asked */
- if((!sending_http_headers) && (
-#ifdef CURL_DO_LINEEND_CONV
- /* always convert if we're FTPing in ASCII mode */
- (data->set.prefer_ascii) ||
-#endif
- (data->set.crlf))) {
- /* Do we need to allocate a scratch buffer? */
- if(!data->state.scratch) {
- data->state.scratch = malloc(2 * BUFSIZE);
- if(!data->state.scratch) {
- failf(data, "Failed to alloc scratch buffer!");
-
- return CURLE_OUT_OF_MEMORY;
- }
- }
-
- /*
- * ASCII/EBCDIC Note: This is presumably a text (not binary)
- * transfer so the data should already be in ASCII.
- * That means the hex values for ASCII CR (0x0d) & LF (0x0a)
- * must be used instead of the escape sequences \r & \n.
- */
- for(i = 0, si = 0; i < nread; i++, si++) {
- if(data->req.upload_fromhere[i] == 0x0a) {
- data->state.scratch[si++] = 0x0d;
- data->state.scratch[si] = 0x0a;
- if(!data->set.crlf) {
- /* we're here only because FTP is in ASCII mode...
- bump infilesize for the LF we just added */
- data->state.infilesize++;
- }
- }
- else
- data->state.scratch[si] = data->req.upload_fromhere[i];
- }
-
- if(si != nread) {
- /* only perform the special operation if we really did replace
- anything */
- nread = si;
-
- /* upload from the new (replaced) buffer instead */
- data->req.upload_fromhere = data->state.scratch;
-
- /* set the new amount too */
- data->req.upload_present = nread;
- }
- }
-
-#ifndef CURL_DISABLE_SMTP
- if(conn->handler->protocol & PROTO_FAMILY_SMTP) {
- result = Curl_smtp_escape_eob(conn, nread);
- if(result)
- return result;
- }
-#endif /* CURL_DISABLE_SMTP */
- } /* if 0 == data->req.upload_present */
- else {
- /* We have a partial buffer left from a previous "round". Use
- that instead of reading more data */
- }
-
- /* write to socket (send away data) */
- result = Curl_write(conn,
- conn->writesockfd, /* socket to send to */
- data->req.upload_fromhere, /* buffer pointer */
- data->req.upload_present, /* buffer size */
- &bytes_written); /* actually sent */
-
- if(result)
- return result;
-
- if(data->set.verbose)
- /* show the data before we change the pointer upload_fromhere */
- Curl_debug(data, CURLINFO_DATA_OUT, data->req.upload_fromhere,
- (size_t)bytes_written, conn);
-
- k->writebytecount += bytes_written;
-
- if(k->writebytecount == data->state.infilesize) {
- /* we have sent all data we were supposed to */
- k->upload_done = TRUE;
- infof(data, "We are completely uploaded and fine\n");
- }
-
- if(data->req.upload_present != bytes_written) {
- /* we only wrote a part of the buffer (if anything), deal with it! */
-
- /* store the amount of bytes left in the buffer to write */
- data->req.upload_present -= bytes_written;
-
- /* advance the pointer where to find the buffer when the next send
- is to happen */
- data->req.upload_fromhere += bytes_written;
- }
- else {
- /* we've uploaded that buffer now */
- data->req.upload_fromhere = k->uploadbuf;
- data->req.upload_present = 0; /* no more bytes left */
-
- if(k->upload_done) {
- /* switch off writing, we're done! */
- k->keepon &= ~KEEP_SEND; /* we're done writing */
- }
- }
-
- Curl_pgrsSetUploadCounter(data, k->writebytecount);
-
- } WHILE_FALSE; /* just to break out from! */
-
- return CURLE_OK;
-}
-
-/*
- * Curl_readwrite() is the low-level function to be called when data is to
- * be read and written to/from the connection.
- */
-CURL_STATIC CURLcode Curl_readwrite(struct connectdata *conn,
- bool *done)
-{
- struct SessionHandle *data = conn->data;
- struct SingleRequest *k = &data->req;
- CURLcode result;
- int didwhat=0;
-
- curl_socket_t fd_read;
- curl_socket_t fd_write;
- int select_res = conn->cselect_bits;
-
- conn->cselect_bits = 0;
-
- /* only use the proper socket if the *_HOLD bit is not set simultaneously as
- then we are in rate limiting state in that transfer direction */
-
- if((k->keepon & KEEP_RECVBITS) == KEEP_RECV)
- fd_read = conn->sockfd;
- else
- fd_read = CURL_SOCKET_BAD;
-
- if((k->keepon & KEEP_SENDBITS) == KEEP_SEND)
- fd_write = conn->writesockfd;
- else
- fd_write = CURL_SOCKET_BAD;
-
- if(!select_res) /* Call for select()/poll() only, if read/write/error
- status is not known. */
- select_res = Curl_socket_ready(fd_read, fd_write, 0);
-
- if(select_res == CURL_CSELECT_ERR) {
- failf(data, "select/poll returned error");
- return CURLE_SEND_ERROR;
- }
-
- /* We go ahead and do a read if we have a readable socket or if
- the stream was rewound (in which case we have data in a
- buffer) */
- if((k->keepon & KEEP_RECV) &&
- ((select_res & CURL_CSELECT_IN) || conn->bits.stream_was_rewound)) {
-
- result = readwrite_data(data, conn, k, &didwhat, done);
- if(result || *done)
- return result;
- }
-
- /* If we still have writing to do, we check if we have a writable socket. */
- if((k->keepon & KEEP_SEND) && (select_res & CURL_CSELECT_OUT)) {
- /* write */
-
- result = readwrite_upload(data, conn, k, &didwhat);
- if(result)
- return result;
- }
-
- k->now = Curl_tvnow();
- if(didwhat) {
- /* Update read/write counters */
- if(k->bytecountp)
- *k->bytecountp = k->bytecount; /* read count */
- if(k->writebytecountp)
- *k->writebytecountp = k->writebytecount; /* write count */
- }
- else {
- /* no read no write, this is a timeout? */
- if(k->exp100 == EXP100_AWAITING_CONTINUE) {
- /* This should allow some time for the header to arrive, but only a
- very short time as otherwise it'll be too much wasted time too
- often. */
-
- /* Quoting RFC2616, section "8.2.3 Use of the 100 (Continue) Status":
-
- Therefore, when a client sends this header field to an origin server
- (possibly via a proxy) from which it has never seen a 100 (Continue)
- status, the client SHOULD NOT wait for an indefinite period before
- sending the request body.
-
- */
-
- long ms = Curl_tvdiff(k->now, k->start100);
- if(ms >= data->set.expect_100_timeout) {
- /* we've waited long enough, continue anyway */
- k->exp100 = EXP100_SEND_DATA;
- k->keepon |= KEEP_SEND;
- infof(data, "Done waiting for 100-continue\n");
- }
- }
- }
-
- if(Curl_pgrsUpdate(conn))
- result = CURLE_ABORTED_BY_CALLBACK;
- else
- result = Curl_speedcheck(data, k->now);
- if(result)
- return result;
-
- if(k->keepon) {
- if(0 > Curl_timeleft(data, &k->now, FALSE)) {
- if(k->size != -1) {
- failf(data, "Operation timed out after %ld milliseconds with %"
- CURL_FORMAT_CURL_OFF_T " out of %"
- CURL_FORMAT_CURL_OFF_T " bytes received",
- Curl_tvdiff(k->now, data->progress.t_startsingle), k->bytecount,
- k->size);
- }
- else {
- failf(data, "Operation timed out after %ld milliseconds with %"
- CURL_FORMAT_CURL_OFF_T " bytes received",
- Curl_tvdiff(k->now, data->progress.t_startsingle), k->bytecount);
- }
- return CURLE_OPERATION_TIMEDOUT;
- }
- }
- else {
- /*
- * The transfer has been performed. Just make some general checks before
- * returning.
- */
-
- if(!(data->set.opt_no_body) && (k->size != -1) &&
- (k->bytecount != k->size) &&
-#ifdef CURL_DO_LINEEND_CONV
- /* Most FTP servers don't adjust their file SIZE response for CRLFs,
- so we'll check to see if the discrepancy can be explained
- by the number of CRLFs we've changed to LFs.
- */
- (k->bytecount != (k->size + data->state.crlf_conversions)) &&
-#endif /* CURL_DO_LINEEND_CONV */
- !data->req.newurl) {
- failf(data, "transfer closed with %" CURL_FORMAT_CURL_OFF_T
- " bytes remaining to read",
- k->size - k->bytecount);
- return CURLE_PARTIAL_FILE;
- }
- else if(!(data->set.opt_no_body) &&
- k->chunk &&
- (conn->chunk.state != CHUNK_STOP)) {
- /*
- * In chunked mode, return an error if the connection is closed prior to
- * the empty (terminating) chunk is read.
- *
- * The condition above used to check for
- * conn->proto.http->chunk.datasize != 0 which is true after reading
- * *any* chunk, not just the empty chunk.
- *
- */
- failf(data, "transfer closed with outstanding read data remaining");
- return CURLE_PARTIAL_FILE;
- }
- if(Curl_pgrsUpdate(conn))
- return CURLE_ABORTED_BY_CALLBACK;
- }
-
- /* Now update the "done" boolean we return */
- *done = (0 == (k->keepon&(KEEP_RECV|KEEP_SEND|
- KEEP_RECV_PAUSE|KEEP_SEND_PAUSE))) ? TRUE : FALSE;
-
- return CURLE_OK;
-}
-
-/*
- * Curl_single_getsock() gets called by the multi interface code when the app
- * has requested to get the sockets for the current connection. This function
- * will then be called once for every connection that the multi interface
- * keeps track of. This function will only be called for connections that are
- * in the proper state to have this information available.
- */
-CURL_STATIC int Curl_single_getsock(const struct connectdata *conn,
- curl_socket_t *sock, /* points to numsocks number
- of sockets */
- int numsocks)
-{
- const struct SessionHandle *data = conn->data;
- int bitmap = GETSOCK_BLANK;
- unsigned sockindex = 0;
-
- if(conn->handler->perform_getsock)
- return conn->handler->perform_getsock(conn, sock, numsocks);
-
- if(numsocks < 2)
- /* simple check but we might need two slots */
- return GETSOCK_BLANK;
-
- /* don't include HOLD and PAUSE connections */
- if((data->req.keepon & KEEP_RECVBITS) == KEEP_RECV) {
-
- DEBUGASSERT(conn->sockfd != CURL_SOCKET_BAD);
-
- bitmap |= GETSOCK_READSOCK(sockindex);
- sock[sockindex] = conn->sockfd;
- }
-
- /* don't include HOLD and PAUSE connections */
- if((data->req.keepon & KEEP_SENDBITS) == KEEP_SEND) {
-
- if((conn->sockfd != conn->writesockfd) ||
- bitmap == GETSOCK_BLANK) {
- /* only if they are not the same socket and we have a readable
- one, we increase index */
- if(bitmap != GETSOCK_BLANK)
- sockindex++; /* increase index if we need two entries */
-
- DEBUGASSERT(conn->writesockfd != CURL_SOCKET_BAD);
-
- sock[sockindex] = conn->writesockfd;
- }
-
- bitmap |= GETSOCK_WRITESOCK(sockindex);
- }
-
- return bitmap;
-}
-
-/*
- * Determine optimum sleep time based on configured rate, current rate,
- * and packet size.
- * Returns value in milliseconds.
- *
- * The basic idea is to adjust the desired rate up/down in this method
- * based on whether we are running too slow or too fast. Then, calculate
- * how many milliseconds to wait for the next packet to achieve this new
- * rate.
- */
-CURL_STATIC long Curl_sleep_time(curl_off_t rate_bps, curl_off_t cur_rate_bps,
- int pkt_size)
-{
- curl_off_t min_sleep = 0;
- curl_off_t rv = 0;
-
- if(rate_bps == 0)
- return 0;
-
- /* If running faster than about .1% of the desired speed, slow
- * us down a bit. Use shift instead of division as the 0.1%
- * cutoff is arbitrary anyway.
- */
- if(cur_rate_bps > (rate_bps + (rate_bps >> 10))) {
- /* running too fast, decrease target rate by 1/64th of rate */
- rate_bps -= rate_bps >> 6;
- min_sleep = 1;
- }
- else if(cur_rate_bps < (rate_bps - (rate_bps >> 10))) {
- /* running too slow, increase target rate by 1/64th of rate */
- rate_bps += rate_bps >> 6;
- }
-
- /* Determine number of milliseconds to wait until we do
- * the next packet at the adjusted rate. We should wait
- * longer when using larger packets, for instance.
- */
- rv = ((curl_off_t)(pkt_size * 1000) / rate_bps);
-
- /* Catch rounding errors and always slow down at least 1ms if
- * we are running too fast.
- */
- if(rv < min_sleep)
- rv = min_sleep;
-
- /* Bound value to fit in 'long' on 32-bit platform. That's
- * plenty long enough anyway!
- */
- if(rv > 0x7fffffff)
- rv = 0x7fffffff;
-
- return (long)rv;
-}
-
-/*
- * Curl_pretransfer() is called immediately before a transfer starts.
- */
-CURL_STATIC CURLcode Curl_pretransfer(struct SessionHandle *data)
-{
- CURLcode result;
- if(!data->change.url) {
- /* we can't do anything without URL */
- failf(data, "No URL set!");
- return CURLE_URL_MALFORMAT;
- }
-
- /* Init the SSL session ID cache here. We do it here since we want to do it
- after the *_setopt() calls (that could specify the size of the cache) but
- before any transfer takes place. */
- result = Curl_ssl_initsessions(data, data->set.ssl.max_ssl_sessions);
- if(result)
- return result;
-
- data->set.followlocation=0; /* reset the location-follow counter */
- data->state.this_is_a_follow = FALSE; /* reset this */
- data->state.errorbuf = FALSE; /* no error has occurred */
- data->state.httpversion = 0; /* don't assume any particular server version */
-
- data->state.authproblem = FALSE;
- data->state.authhost.want = data->set.httpauth;
- data->state.authproxy.want = data->set.proxyauth;
- Curl_safefree(data->info.wouldredirect);
- data->info.wouldredirect = NULL;
-
- /* If there is a list of cookie files to read, do it now! */
- if(data->change.cookielist)
- Curl_cookie_loadfiles(data);
-
- /* If there is a list of host pairs to deal with */
- if(data->change.resolve)
- result = Curl_loadhostpairs(data);
-
- if(!result) {
- /* Allow data->set.use_port to set which port to use. This needs to be
- * disabled for example when we follow Location: headers to URLs using
- * different ports! */
- data->state.allow_port = TRUE;
-
-#if defined(HAVE_SIGNAL) && defined(SIGPIPE) && !defined(HAVE_MSG_NOSIGNAL)
- /*************************************************************
- * Tell signal handler to ignore SIGPIPE
- *************************************************************/
- if(!data->set.no_signal)
- data->state.prev_signal = signal(SIGPIPE, SIG_IGN);
-#endif
-
- Curl_initinfo(data); /* reset session-specific information "variables" */
- Curl_pgrsResetTimesSizes(data);
- Curl_pgrsStartNow(data);
-
- if(data->set.timeout)
- Curl_expire(data, data->set.timeout);
-
- if(data->set.connecttimeout)
- Curl_expire(data, data->set.connecttimeout);
-
- /* In case the handle is re-used and an authentication method was picked
- in the session we need to make sure we only use the one(s) we now
- consider to be fine */
- data->state.authhost.picked &= data->state.authhost.want;
- data->state.authproxy.picked &= data->state.authproxy.want;
- }
-
- return result;
-}
-
-/*
- * Curl_posttransfer() is called immediately after a transfer ends
- */
-CURL_STATIC CURLcode Curl_posttransfer(struct SessionHandle *data)
-{
-#if defined(HAVE_SIGNAL) && defined(SIGPIPE) && !defined(HAVE_MSG_NOSIGNAL)
- /* restore the signal handler for SIGPIPE before we get back */
- if(!data->set.no_signal)
- signal(SIGPIPE, data->state.prev_signal);
-#else
- (void)data; /* unused parameter */
-#endif
-
- return CURLE_OK;
-}
-
-#ifndef CURL_DISABLE_HTTP
-/*
- * strlen_url() returns the length of the given URL if the spaces within the
- * URL were properly URL encoded.
- */
-static size_t strlen_url(const char *url)
-{
- const char *ptr;
- size_t newlen=0;
- bool left=TRUE; /* left side of the ? */
-
- for(ptr=url; *ptr; ptr++) {
- switch(*ptr) {
- case '?':
- left=FALSE;
- /* fall through */
- default:
- newlen++;
- break;
- case ' ':
- if(left)
- newlen+=3;
- else
- newlen++;
- break;
- }
- }
- return newlen;
-}
-
-/* strcpy_url() copies a url to a output buffer and URL-encodes the spaces in
- * the source URL accordingly.
- */
-static void strcpy_url(char *output, const char *url)
-{
- /* we must add this with whitespace-replacing */
- bool left=TRUE;
- const char *iptr;
- char *optr = output;
- for(iptr = url; /* read from here */
- *iptr; /* until zero byte */
- iptr++) {
- switch(*iptr) {
- case '?':
- left=FALSE;
- /* fall through */
- default:
- *optr++=*iptr;
- break;
- case ' ':
- if(left) {
- *optr++='%'; /* add a '%' */
- *optr++='2'; /* add a '2' */
- *optr++='0'; /* add a '0' */
- }
- else
- *optr++='+'; /* add a '+' here */
- break;
- }
- }
- *optr=0; /* zero terminate output buffer */
-
-}
-
-/*
- * Returns true if the given URL is absolute (as opposed to relative)
- */
-static bool is_absolute_url(const char *url)
-{
- char prot[16]; /* URL protocol string storage */
- char letter; /* used for a silly sscanf */
-
- return (2 == sscanf(url, "%15[^?&/:]://%c", prot, &letter)) ? TRUE : FALSE;
-}
-
-/*
- * Concatenate a relative URL to a base URL making it absolute.
- * URL-encodes any spaces.
- * The returned pointer must be freed by the caller unless NULL
- * (returns NULL on out of memory).
- */
-static char *concat_url(const char *base, const char *relurl)
-{
- /***
- TRY to append this new path to the old URL
- to the right of the host part. Oh crap, this is doomed to cause
- problems in the future...
- */
- char *newest;
- char *protsep;
- char *pathsep;
- size_t newlen;
-
- const char *useurl = relurl;
- size_t urllen;
-
- /* we must make our own copy of the URL to play with, as it may
- point to read-only data */
- char *url_clone=strdup(base);
-
- if(!url_clone)
- return NULL; /* skip out of this NOW */
-
- /* protsep points to the start of the host name */
- protsep=strstr(url_clone, "//");
- if(!protsep)
- protsep=url_clone;
- else
- protsep+=2; /* pass the slashes */
-
- if('/' != relurl[0]) {
- int level=0;
-
- /* First we need to find out if there's a ?-letter in the URL,
- and cut it and the right-side of that off */
- pathsep = strchr(protsep, '?');
- if(pathsep)
- *pathsep=0;
-
- /* we have a relative path to append to the last slash if there's one
- available, or if the new URL is just a query string (starts with a
- '?') we append the new one at the end of the entire currently worked
- out URL */
- if(useurl[0] != '?') {
- pathsep = strrchr(protsep, '/');
- if(pathsep)
- *pathsep=0;
- }
-
- /* Check if there's any slash after the host name, and if so, remember
- that position instead */
- pathsep = strchr(protsep, '/');
- if(pathsep)
- protsep = pathsep+1;
- else
- protsep = NULL;
-
- /* now deal with one "./" or any amount of "../" in the newurl
- and act accordingly */
-
- if((useurl[0] == '.') && (useurl[1] == '/'))
- useurl+=2; /* just skip the "./" */
-
- while((useurl[0] == '.') &&
- (useurl[1] == '.') &&
- (useurl[2] == '/')) {
- level++;
- useurl+=3; /* pass the "../" */
- }
-
- if(protsep) {
- while(level--) {
- /* cut off one more level from the right of the original URL */
- pathsep = strrchr(protsep, '/');
- if(pathsep)
- *pathsep=0;
- else {
- *protsep=0;
- break;
- }
- }
- }
- }
- else {
- /* We got a new absolute path for this server */
-
- if((relurl[0] == '/') && (relurl[1] == '/')) {
- /* the new URL starts with //, just keep the protocol part from the
- original one */
- *protsep=0;
- useurl = &relurl[2]; /* we keep the slashes from the original, so we
- skip the new ones */
- }
- else {
- /* cut off the original URL from the first slash, or deal with URLs
- without slash */
- pathsep = strchr(protsep, '/');
- if(pathsep) {
- /* When people use badly formatted URLs, such as
- "http://www.url.com?dir=/home/daniel" we must not use the first
- slash, if there's a ?-letter before it! */
- char *sep = strchr(protsep, '?');
- if(sep && (sep < pathsep))
- pathsep = sep;
- *pathsep=0;
- }
- else {
- /* There was no slash. Now, since we might be operating on a badly
- formatted URL, such as "http://www.url.com?id=2380" which doesn't
- use a slash separator as it is supposed to, we need to check for a
- ?-letter as well! */
- pathsep = strchr(protsep, '?');
- if(pathsep)
- *pathsep=0;
- }
- }
- }
-
- /* If the new part contains a space, this is a mighty stupid redirect
- but we still make an effort to do "right". To the left of a '?'
- letter we replace each space with %20 while it is replaced with '+'
- on the right side of the '?' letter.
- */
- newlen = strlen_url(useurl);
-
- urllen = strlen(url_clone);
-
- newest = malloc(urllen + 1 + /* possible slash */
- newlen + 1 /* zero byte */);
-
- if(!newest) {
- free(url_clone); /* don't leak this */
- return NULL;
- }
-
- /* copy over the root url part */
- memcpy(newest, url_clone, urllen);
-
- /* check if we need to append a slash */
- if(('/' == useurl[0]) || (protsep && !*protsep) || ('?' == useurl[0]))
- ;
- else
- newest[urllen++]='/';
-
- /* then append the new piece on the right side */
- strcpy_url(&newest[urllen], useurl);
-
- free(url_clone);
-
- return newest;
-}
-#endif /* CURL_DISABLE_HTTP */
-
-/*
- * Curl_follow() handles the URL redirect magic. Pass in the 'newurl' string
- * as given by the remote server and set up the new URL to request.
- */
-CURLcode Curl_follow(struct SessionHandle *data,
- char *newurl, /* this 'newurl' is the Location: string,
- and it must be malloc()ed before passed
- here */
- followtype type) /* see transfer.h */
-{
-#ifdef CURL_DISABLE_HTTP
- (void)data;
- (void)newurl;
- (void)type;
- /* Location: following will not happen when HTTP is disabled */
- return CURLE_TOO_MANY_REDIRECTS;
-#else
-
- /* Location: redirect */
- bool disallowport = FALSE;
-
- if(type == FOLLOW_REDIR) {
- if((data->set.maxredirs != -1) &&
- (data->set.followlocation >= data->set.maxredirs)) {
- failf(data, "Maximum (%ld) redirects followed", data->set.maxredirs);
- return CURLE_TOO_MANY_REDIRECTS;
- }
-
- /* mark the next request as a followed location: */
- data->state.this_is_a_follow = TRUE;
-
- data->set.followlocation++; /* count location-followers */
-
- if(data->set.http_auto_referer) {
- /* We are asked to automatically set the previous URL as the referer
- when we get the next URL. We pick the ->url field, which may or may
- not be 100% correct */
-
- if(data->change.referer_alloc) {
- Curl_safefree(data->change.referer);
- data->change.referer_alloc = FALSE;
- }
-
- data->change.referer = strdup(data->change.url);
- if(!data->change.referer)
- return CURLE_OUT_OF_MEMORY;
- data->change.referer_alloc = TRUE; /* yes, free this later */
- }
- }
-
- if(!is_absolute_url(newurl)) {
- /***
- *DANG* this is an RFC 2068 violation. The URL is supposed
- to be absolute and this doesn't seem to be that!
- */
- char *absolute = concat_url(data->change.url, newurl);
- if(!absolute)
- return CURLE_OUT_OF_MEMORY;
- free(newurl);
- newurl = absolute;
- }
- else {
- /* This is an absolute URL, don't allow the custom port number */
- disallowport = TRUE;
-
- if(strchr(newurl, ' ')) {
- /* This new URL contains at least one space, this is a mighty stupid
- redirect but we still make an effort to do "right". */
- char *newest;
- size_t newlen = strlen_url(newurl);
-
- newest = malloc(newlen+1); /* get memory for this */
- if(!newest)
- return CURLE_OUT_OF_MEMORY;
- strcpy_url(newest, newurl); /* create a space-free URL */
-
- free(newurl); /* that was no good */
- newurl = newest; /* use this instead now */
- }
-
- }
-
- if(type == FOLLOW_FAKE) {
- /* we're only figuring out the new url if we would've followed locations
- but now we're done so we can get out! */
- data->info.wouldredirect = newurl;
- return CURLE_OK;
- }
-
- if(disallowport)
- data->state.allow_port = FALSE;
-
- if(data->change.url_alloc) {
- Curl_safefree(data->change.url);
- data->change.url_alloc = FALSE;
- }
-
- data->change.url = newurl;
- data->change.url_alloc = TRUE;
- newurl = NULL; /* don't free! */
-
- infof(data, "Issue another request to this URL: '%s'\n", data->change.url);
-
- /*
- * We get here when the HTTP code is 300-399 (and 401). We need to perform
- * differently based on exactly what return code there was.
- *
- * News from 7.10.6: we can also get here on a 401 or 407, in case we act on
- * a HTTP (proxy-) authentication scheme other than Basic.
- */
- switch(data->info.httpcode) {
- /* 401 - Act on a WWW-Authenticate, we keep on moving and do the
- Authorization: XXXX header in the HTTP request code snippet */
- /* 407 - Act on a Proxy-Authenticate, we keep on moving and do the
- Proxy-Authorization: XXXX header in the HTTP request code snippet */
- /* 300 - Multiple Choices */
- /* 306 - Not used */
- /* 307 - Temporary Redirect */
- default: /* for all above (and the unknown ones) */
- /* Some codes are explicitly mentioned since I've checked RFC2616 and they
- * seem to be OK to POST to.
- */
- break;
- case 301: /* Moved Permanently */
- /* (quote from RFC7231, section 6.4.2)
- *
- * Note: For historical reasons, a user agent MAY change the request
- * method from POST to GET for the subsequent request. If this
- * behavior is undesired, the 307 (Temporary Redirect) status code
- * can be used instead.
- *
- * ----
- *
- * Many webservers expect this, so these servers often answers to a POST
- * request with an error page. To be sure that libcurl gets the page that
- * most user agents would get, libcurl has to force GET.
- *
- * This behaviour is forbidden by RFC1945 and the obsolete RFC2616, and
- * can be overridden with CURLOPT_POSTREDIR.
- */
- if((data->set.httpreq == HTTPREQ_POST
- || data->set.httpreq == HTTPREQ_POST_FORM)
- && !(data->set.keep_post & CURL_REDIR_POST_301)) {
- infof(data, "Switch from POST to GET\n");
- data->set.httpreq = HTTPREQ_GET;
- }
- break;
- case 302: /* Found */
- /* (quote from RFC7231, section 6.4.3)
- *
- * Note: For historical reasons, a user agent MAY change the request
- * method from POST to GET for the subsequent request. If this
- * behavior is undesired, the 307 (Temporary Redirect) status code
- * can be used instead.
- *
- * ----
- *
- * Many webservers expect this, so these servers often answers to a POST
- * request with an error page. To be sure that libcurl gets the page that
- * most user agents would get, libcurl has to force GET.
- *
- * This behaviour is forbidden by RFC1945 and the obsolete RFC2616, and
- * can be overridden with CURLOPT_POSTREDIR.
- */
- if((data->set.httpreq == HTTPREQ_POST
- || data->set.httpreq == HTTPREQ_POST_FORM)
- && !(data->set.keep_post & CURL_REDIR_POST_302)) {
- infof(data, "Switch from POST to GET\n");
- data->set.httpreq = HTTPREQ_GET;
- }
- break;
-
- case 303: /* See Other */
- /* Disable both types of POSTs, unless the user explicitely
- asks for POST after POST */
- if(data->set.httpreq != HTTPREQ_GET
- && !(data->set.keep_post & CURL_REDIR_POST_303)) {
- data->set.httpreq = HTTPREQ_GET; /* enforce GET request */
- infof(data, "Disables POST, goes with %s\n",
- data->set.opt_no_body?"HEAD":"GET");
- }
- break;
- case 304: /* Not Modified */
- /* 304 means we did a conditional request and it was "Not modified".
- * We shouldn't get any Location: header in this response!
- */
- break;
- case 305: /* Use Proxy */
- /* (quote from RFC2616, section 10.3.6):
- * "The requested resource MUST be accessed through the proxy given
- * by the Location field. The Location field gives the URI of the
- * proxy. The recipient is expected to repeat this single request
- * via the proxy. 305 responses MUST only be generated by origin
- * servers."
- */
- break;
- }
- Curl_pgrsTime(data, TIMER_REDIRECT);
- Curl_pgrsResetTimesSizes(data);
-
- return CURLE_OK;
-#endif /* CURL_DISABLE_HTTP */
-}
-
-CURL_STATIC CURLcode
-Curl_reconnect_request(struct connectdata **connp)
-{
- CURLcode result = CURLE_OK;
- struct connectdata *conn = *connp;
- struct SessionHandle *data = conn->data;
-
- /* This was a re-use of a connection and we got a write error in the
- * DO-phase. Then we DISCONNECT this connection and have another attempt to
- * CONNECT and then DO again! The retry cannot possibly find another
- * connection to re-use, since we only keep one possible connection for
- * each. */
-
- infof(data, "Re-used connection seems dead, get a new one\n");
-
- connclose(conn, "Reconnect dead connection"); /* enforce close */
- result = Curl_done(&conn, result, FALSE); /* we are so done with this */
-
- /* conn may no longer be a good pointer, clear it to avoid mistakes by
- parent functions */
- *connp = NULL;
-
- /*
- * According to bug report #1330310. We need to check for CURLE_SEND_ERROR
- * here as well. I figure this could happen when the request failed on a FTP
- * connection and thus Curl_done() itself tried to use the connection
- * (again). Slight Lack of feedback in the report, but I don't think this
- * extra check can do much harm.
- */
- if(!result || (CURLE_SEND_ERROR == result)) {
- bool async;
- bool protocol_done = TRUE;
-
- /* Now, redo the connect and get a new connection */
- result = Curl_connect(data, connp, &async, &protocol_done);
- if(!result) {
- /* We have connected or sent away a name resolve query fine */
-
- conn = *connp; /* setup conn to again point to something nice */
- if(async) {
- /* Now, if async is TRUE here, we need to wait for the name
- to resolve */
- result = Curl_resolver_wait_resolv(conn, NULL);
- if(result)
- return result;
-
- /* Resolved, continue with the connection */
- result = Curl_async_resolved(conn, &protocol_done);
- if(result)
- return result;
- }
- }
- }
-
- return result;
-}
-
-/* Returns CURLE_OK *and* sets '*url' if a request retry is wanted.
-
- NOTE: that the *url is malloc()ed. */
-CURL_STATIC CURLcode Curl_retry_request(struct connectdata *conn,
- char **url)
-{
- struct SessionHandle *data = conn->data;
-
- *url = NULL;
-
- /* if we're talking upload, we can't do the checks below, unless the protocol
- is HTTP as when uploading over HTTP we will still get a response */
- if(data->set.upload &&
- !(conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_RTSP)))
- return CURLE_OK;
-
- if((data->req.bytecount + data->req.headerbytecount == 0) &&
- conn->bits.reuse &&
- !data->set.opt_no_body &&
- (data->set.rtspreq != RTSPREQ_RECEIVE)) {
- /* We got no data, we attempted to re-use a connection and yet we want a
- "body". This might happen if the connection was left alive when we were
- done using it before, but that was closed when we wanted to read from
- it again. Bad luck. Retry the same request on a fresh connect! */
- infof(conn->data, "Connection died, retrying a fresh connect\n");
- *url = strdup(conn->data->change.url);
- if(!*url)
- return CURLE_OUT_OF_MEMORY;
-
- connclose(conn, "retry"); /* close this connection */
- conn->bits.retry = TRUE; /* mark this as a connection we're about
- to retry. Marking it this way should
- prevent i.e HTTP transfers to return
- error just because nothing has been
- transferred! */
-
-
- if(conn->handler->protocol&PROTO_FAMILY_HTTP) {
- struct HTTP *http = data->req.protop;
- if(http->writebytecount)
- return Curl_readrewind(conn);
- }
- }
- return CURLE_OK;
-}
-
-/*
- * Curl_setup_transfer() is called to setup some basic properties for the
- * upcoming transfer.
- */
-CURL_STATIC void
-Curl_setup_transfer(
- struct connectdata *conn, /* connection data */
- int sockindex, /* socket index to read from or -1 */
- curl_off_t size, /* -1 if unknown at this point */
- bool getheader, /* TRUE if header parsing is wanted */
- curl_off_t *bytecountp, /* return number of bytes read or NULL */
- int writesockindex, /* socket index to write to, it may very well be
- the same we read from. -1 disables */
- curl_off_t *writecountp /* return number of bytes written or NULL */
- )
-{
- struct SessionHandle *data;
- struct SingleRequest *k;
-
- DEBUGASSERT(conn != NULL);
-
- data = conn->data;
- k = &data->req;
-
- DEBUGASSERT((sockindex <= 1) && (sockindex >= -1));
-
- /* now copy all input parameters */
- conn->sockfd = sockindex == -1 ?
- CURL_SOCKET_BAD : conn->sock[sockindex];
- conn->writesockfd = writesockindex == -1 ?
- CURL_SOCKET_BAD:conn->sock[writesockindex];
- k->getheader = getheader;
-
- k->size = size;
- k->bytecountp = bytecountp;
- k->writebytecountp = writecountp;
-
- /* The code sequence below is placed in this function just because all
- necessary input is not always known in do_complete() as this function may
- be called after that */
-
- if(!k->getheader) {
- k->header = FALSE;
- if(size > 0)
- Curl_pgrsSetDownloadSize(data, size);
- }
- /* we want header and/or body, if neither then don't do this! */
- if(k->getheader || !data->set.opt_no_body) {
-
- if(conn->sockfd != CURL_SOCKET_BAD)
- k->keepon |= KEEP_RECV;
-
- if(conn->writesockfd != CURL_SOCKET_BAD) {
- struct HTTP *http = data->req.protop;
- /* HTTP 1.1 magic:
-
- Even if we require a 100-return code before uploading data, we might
- need to write data before that since the REQUEST may not have been
- finished sent off just yet.
-
- Thus, we must check if the request has been sent before we set the
- state info where we wait for the 100-return code
- */
- if((data->state.expect100header) &&
- (conn->handler->protocol&PROTO_FAMILY_HTTP) &&
- (http->sending == HTTPSEND_BODY)) {
- /* wait with write until we either got 100-continue or a timeout */
- k->exp100 = EXP100_AWAITING_CONTINUE;
- k->start100 = Curl_tvnow();
-
- /* Set a timeout for the multi interface. Add the inaccuracy margin so
- that we don't fire slightly too early and get denied to run. */
- Curl_expire(data, data->set.expect_100_timeout);
- }
- else {
- if(data->state.expect100header)
- /* when we've sent off the rest of the headers, we must await a
- 100-continue but first finish sending the request */
- k->exp100 = EXP100_SENDING_REQUEST;
-
- /* enable the write bit when we're not waiting for continue */
- k->keepon |= KEEP_SEND;
- }
- } /* if(conn->writesockfd != CURL_SOCKET_BAD) */
- } /* if(k->getheader || !data->set.opt_no_body) */
-
-}
|