1468 lines
50 KiB
C
1468 lines
50 KiB
C
/*****************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2002, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* In order to be useful for every potential user, curl and libcurl are
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* dual-licensed under the MPL and the MIT/X-derivate licenses.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the MPL or the MIT/X-derivate
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* licenses. You may pick one of these licenses.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* $Id$
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*****************************************************************************/
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#include "setup.h"
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/* -- WIN32 approved -- */
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include "strequal.h"
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#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
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#include <winsock.h>
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#include <time.h>
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#include <io.h>
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#else
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#include <netinet/in.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <netdb.h>
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_NET_IF_H
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#include <net/if.h>
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#endif
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#include <sys/ioctl.h>
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#include <signal.h>
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#ifndef HAVE_SELECT
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#error "We can't compile without select() support!"
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#endif
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#ifndef HAVE_SOCKET
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#error "We can't compile without socket() support!"
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#endif
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#endif
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#include "urldata.h"
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#include <curl/curl.h>
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#include <curl/types.h>
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#include "netrc.h"
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#include "hostip.h"
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#include "transfer.h"
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#include "sendf.h"
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#include "speedcheck.h"
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#include "getpass.h"
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#include "progress.h"
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#include "getdate.h"
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#include "http.h"
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#include "url.h"
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#include "getinfo.h"
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#include "ssluse.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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/* The last #include file should be: */
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#ifdef MALLOCDEBUG
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#include "memdebug.h"
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#endif
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#ifndef min
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#define min(a, b) ((a) < (b) ? (a) : (b))
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#endif
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enum {
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KEEP_NONE,
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KEEP_READ,
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KEEP_WRITE
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};
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/*
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* compareheader()
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*
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* Returns TRUE if 'headerline' contains the 'header' with given 'content'.
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* Pass headers WITH the colon.
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*/
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static bool
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compareheader(char *headerline, /* line to check */
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const char *header, /* header keyword _with_ colon */
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const char *content) /* content string to find */
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{
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/* RFC2616, section 4.2 says: "Each header field consists of a name followed
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* by a colon (":") and the field value. Field names are case-insensitive.
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* The field value MAY be preceded by any amount of LWS, though a single SP
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* is preferred." */
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size_t hlen = strlen(header);
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size_t clen;
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size_t len;
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char *start;
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char *end;
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if(!strnequal(headerline, header, hlen))
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return FALSE; /* doesn't start with header */
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/* pass the header */
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start = &headerline[hlen];
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/* pass all white spaces */
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while(*start && isspace((int)*start))
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start++;
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/* find the end of the header line */
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end = strchr(start, '\r'); /* lines end with CRLF */
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if(!end) {
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/* in case there's a non-standard compliant line here */
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end = strchr(start, '\n');
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if(!end)
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/* hm, there's no line ending here, return false and bail out! */
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return FALSE;
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}
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len = end-start; /* length of the content part of the input line */
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clen = strlen(content); /* length of the word to find */
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/* find the content string in the rest of the line */
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for(;len>=clen;len--, start++) {
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if(strnequal(start, content, clen))
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return TRUE; /* match! */
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}
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return FALSE; /* no match */
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}
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/* We keep this static and global since this is read-only and NEVER
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changed. It should just remain a blanked-out timeout value. */
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static struct timeval notimeout={0,0};
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CURLcode Curl_readwrite(struct connectdata *conn,
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bool *done)
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{
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struct Curl_transfer_keeper *k = &conn->keep;
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struct SessionHandle *data = conn->data;
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int result;
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ssize_t nread; /* number of bytes read */
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int didwhat=0;
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/* These two are used only if no other select() or _fdset() have been
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invoked before this. This typicly happens if you use the multi interface
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and call curl_multi_perform() without calling curl_multi_fdset()
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first. */
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fd_set extrareadfd;
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fd_set extrawritefd;
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fd_set *readfdp = k->readfdp;
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fd_set *writefdp = k->writefdp;
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if((k->keepon & KEEP_READ) && !readfdp) {
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/* reading is requested, but no socket descriptor pointer was set */
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FD_ZERO(&extrareadfd);
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FD_SET(conn->sockfd, &extrareadfd);
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readfdp = &extrareadfd;
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/* no write, no exceptions, no timeout */
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select(conn->sockfd+1, readfdp, NULL, NULL, ¬imeout);
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}
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if((k->keepon & KEEP_WRITE) && !writefdp) {
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/* writing is requested, but no socket descriptor pointer was set */
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FD_ZERO(&extrawritefd);
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FD_SET(conn->writesockfd, &extrawritefd);
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writefdp = &extrawritefd;
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/* no read, no exceptions, no timeout */
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select(conn->writesockfd+1, NULL, writefdp, NULL, ¬imeout);
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}
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do {
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/* If we still have reading to do, we check if we have a readable
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socket. Sometimes the reafdp is NULL, it no fd_set was done using
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the multi interface and then we can do nothing but to attempt a
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read to be sure. */
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if((k->keepon & KEEP_READ) &&
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(FD_ISSET(conn->sockfd, readfdp))) {
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/* read! */
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result = Curl_read(conn, conn->sockfd, k->buf,
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data->set.buffer_size?
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data->set.buffer_size:BUFSIZE -1,
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&nread);
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if(0>result)
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break; /* get out of loop */
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if(result>0)
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return result;
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if ((k->bytecount == 0) && (k->writebytecount == 0))
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Curl_pgrsTime(data, TIMER_STARTTRANSFER);
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didwhat |= KEEP_READ;
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/* NULL terminate, allowing string ops to be used */
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if (0 < nread)
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k->buf[nread] = 0;
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/* if we receive 0 or less here, the server closed the connection and
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we bail out from this! */
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else if (0 >= nread) {
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k->keepon &= ~KEEP_READ;
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FD_ZERO(&k->rkeepfd);
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break;
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}
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/* Default buffer to use when we write the buffer, it may be changed
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in the flow below before the actual storing is done. */
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k->str = k->buf;
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/* Since this is a two-state thing, we check if we are parsing
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headers at the moment or not. */
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if (k->header) {
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/* we are in parse-the-header-mode */
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bool stop_reading = FALSE;
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/* header line within buffer loop */
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do {
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int hbufp_index;
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/* str_start is start of line within buf */
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k->str_start = k->str;
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k->end_ptr = strchr (k->str_start, '\n');
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if (!k->end_ptr) {
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/* no more complete header lines within buffer */
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/* copy what is remaining into headerbuff */
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int str_length = (int)strlen(k->str);
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/*
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* We enlarge the header buffer if it seems to be too
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* smallish
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*/
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if (k->hbuflen + (int)str_length >=
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data->state.headersize) {
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char *newbuff;
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long newsize=MAX((k->hbuflen+str_length)*3/2,
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data->state.headersize*2);
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hbufp_index = k->hbufp - data->state.headerbuff;
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newbuff = (char *)realloc(data->state.headerbuff, newsize);
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if(!newbuff) {
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failf (data, "Failed to alloc memory for big header!");
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return CURLE_OUT_OF_MEMORY;
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}
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data->state.headersize=newsize;
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data->state.headerbuff = newbuff;
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k->hbufp = data->state.headerbuff + hbufp_index;
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}
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strcpy (k->hbufp, k->str);
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k->hbufp += strlen (k->str);
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k->hbuflen += strlen (k->str);
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break; /* read more and try again */
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}
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k->str = k->end_ptr + 1; /* move past new line */
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/*
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* We're about to copy a chunk of data to the end of the
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* already received header. We make sure that the full string
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* fit in the allocated header buffer, or else we enlarge
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* it.
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*/
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if (k->hbuflen + (k->str - k->str_start) >=
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data->state.headersize) {
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char *newbuff;
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long newsize=MAX((k->hbuflen+
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(k->str-k->str_start))*3/2,
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data->state.headersize*2);
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hbufp_index = k->hbufp - data->state.headerbuff;
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newbuff = (char *)realloc(data->state.headerbuff, newsize);
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if(!newbuff) {
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failf (data, "Failed to alloc memory for big header!");
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return CURLE_OUT_OF_MEMORY;
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}
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data->state.headersize= newsize;
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data->state.headerbuff = newbuff;
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k->hbufp = data->state.headerbuff + hbufp_index;
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}
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/* copy to end of line */
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strncpy (k->hbufp, k->str_start, k->str - k->str_start);
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k->hbufp += k->str - k->str_start;
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k->hbuflen += k->str - k->str_start;
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*k->hbufp = 0;
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k->p = data->state.headerbuff;
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/****
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* We now have a FULL header line that p points to
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*****/
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if (('\n' == *k->p) || ('\r' == *k->p)) {
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int headerlen;
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/* Zero-length header line means end of headers! */
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if ('\r' == *k->p)
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k->p++; /* pass the \r byte */
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if ('\n' == *k->p)
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k->p++; /* pass the \n byte */
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if(100 == k->httpcode) {
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/*
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* we have made a HTTP PUT or POST and this is 1.1-lingo
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* that tells us that the server is OK with this and ready
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* to receive our stuff.
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* However, we'll get more headers now so we must get
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* back into the header-parsing state!
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*/
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k->header = TRUE;
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k->headerline = 0; /* restart the header line counter */
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/* if we did wait for this do enable write now! */
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if (k->write_after_100_header) {
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k->write_after_100_header = FALSE;
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FD_SET (conn->writesockfd, &k->writefd); /* write */
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k->keepon |= KEEP_WRITE;
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k->wkeepfd = k->writefd;
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}
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}
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else
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k->header = FALSE; /* no more header to parse! */
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if (417 == k->httpcode) {
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/*
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* we got: "417 Expectation Failed" this means:
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* we have made a HTTP call and our Expect Header
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* seems to cause a problem => abort the write operations
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* (or prevent them from starting
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*/
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k->write_after_100_header = FALSE;
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k->keepon &= ~KEEP_WRITE;
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FD_ZERO(&k->wkeepfd);
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}
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/* now, only output this if the header AND body are requested:
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*/
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k->writetype = CLIENTWRITE_HEADER;
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if (data->set.http_include_header)
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k->writetype |= CLIENTWRITE_BODY;
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headerlen = k->p - data->state.headerbuff;
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result = Curl_client_write(data, k->writetype,
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data->state.headerbuff,
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headerlen);
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if(result)
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return result;
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data->info.header_size += headerlen;
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conn->headerbytecount += headerlen;
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if(!k->header) {
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/*
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* really end-of-headers.
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*
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* If we requested a "no body", this is a good time to get
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* out and return home.
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*/
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if(data->set.no_body)
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stop_reading = TRUE;
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else if(!conn->bits.close) {
|
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/* If this is not the last request before a close, we must
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set the maximum download size to the size of the
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expected document or else, we won't know when to stop
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reading! */
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if(-1 != conn->size)
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conn->maxdownload = conn->size;
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}
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/* If max download size is *zero* (nothing) we already
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have nothing and can safely return ok now! */
|
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if(0 == conn->maxdownload)
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stop_reading = TRUE;
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|
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if(stop_reading) {
|
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/* we make sure that this socket isn't read more now */
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k->keepon &= ~KEEP_READ;
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FD_ZERO(&k->rkeepfd);
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}
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break; /* exit header line loop */
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}
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/* We continue reading headers, so reset the line-based
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header parsing variables hbufp && hbuflen */
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k->hbufp = data->state.headerbuff;
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k->hbuflen = 0;
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continue;
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}
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|
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/*
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* Checks for special headers coming up.
|
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*/
|
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|
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if (!k->headerline++) {
|
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/* This is the first header, it MUST be the error code line
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or else we consiser this to be the body right away! */
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int httpversion_major;
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int nc=sscanf (k->p, " HTTP/%d.%d %3d",
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&httpversion_major,
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&k->httpversion,
|
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&k->httpcode);
|
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if (nc==3) {
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k->httpversion += 10 * httpversion_major;
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}
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else {
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/* this is the real world, not a Nirvana
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NCSA 1.5.x returns this crap when asked for HTTP/1.1
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*/
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nc=sscanf (k->p, " HTTP %3d", &k->httpcode);
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k->httpversion = 10;
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}
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|
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if (nc) {
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data->info.httpcode = k->httpcode;
|
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data->info.httpversion = k->httpversion;
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|
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/* 404 -> URL not found! */
|
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if (data->set.http_fail_on_error &&
|
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(k->httpcode >= 400)) {
|
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/* If we have been told to fail hard on HTTP-errors,
|
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here is the check for that: */
|
|
/* serious error, go home! */
|
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failf (data, "The requested file was not found");
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return CURLE_HTTP_NOT_FOUND;
|
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}
|
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|
|
if(k->httpversion == 10)
|
|
/* Default action for HTTP/1.0 must be to close, unless
|
|
we get one of those fancy headers that tell us the
|
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server keeps it open for us! */
|
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conn->bits.close = TRUE;
|
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|
|
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. */
|
|
conn->size=0;
|
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conn->maxdownload=0;
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break;
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default:
|
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/* nothing */
|
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break;
|
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}
|
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}
|
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else {
|
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k->header = FALSE; /* this is not a header line */
|
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break;
|
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}
|
|
}
|
|
/* check for Content-Length: header lines to get size */
|
|
if (strnequal("Content-Length:", k->p, 15) &&
|
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sscanf (k->p+15, " %ld", &k->contentlength)) {
|
|
conn->size = k->contentlength;
|
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Curl_pgrsSetDownloadSize(data, k->contentlength);
|
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}
|
|
/* check for Content-Type: header lines to get the mime-type */
|
|
else if (strnequal("Content-Type:", k->p, 13)) {
|
|
char *start;
|
|
char *end;
|
|
int len;
|
|
|
|
/* Find the first non-space letter */
|
|
for(start=k->p+14;
|
|
*start && isspace((int)*start);
|
|
start++);
|
|
|
|
/* count all non-space letters following */
|
|
for(end=start, len=0;
|
|
*end && !isspace((int)*end);
|
|
end++, len++);
|
|
|
|
/* allocate memory of a cloned copy */
|
|
data->info.contenttype = malloc(len + 1);
|
|
if (NULL == data->info.contenttype)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* copy the content-type string */
|
|
memcpy(data->info.contenttype, start, len);
|
|
data->info.contenttype[len] = 0; /* zero terminate */
|
|
}
|
|
else if((k->httpversion == 10) &&
|
|
conn->bits.httpproxy &&
|
|
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.
|
|
*/
|
|
conn->bits.close = FALSE; /* don't close when done */
|
|
infof(data, "HTTP/1.0 proxy connection set to keep alive!\n");
|
|
}
|
|
else if((k->httpversion == 10) &&
|
|
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] */
|
|
conn->bits.close = FALSE; /* don't close when done */
|
|
infof(data, "HTTP/1.0 connection set to keep alive!\n");
|
|
}
|
|
else if (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.
|
|
*/
|
|
conn->bits.close = TRUE; /* close when done */
|
|
}
|
|
else if (compareheader(k->p, "Transfer-Encoding:", "chunked")) {
|
|
/*
|
|
* [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. */
|
|
conn->bits.chunk = TRUE; /* chunks coming our way */
|
|
|
|
/* init our chunky engine */
|
|
Curl_httpchunk_init(conn);
|
|
}
|
|
else if (strnequal("Content-Range:", k->p, 14)) {
|
|
if (sscanf (k->p+14, " bytes %d-", &k->offset) ||
|
|
sscanf (k->p+14, " bytes: %d-", &k->offset)) {
|
|
/* This second format was added August 1st 2000 by Igor
|
|
Khristophorov since Sun's webserver JavaWebServer/1.1.1
|
|
obviously sends the header this way! :-( */
|
|
if (conn->resume_from == k->offset) {
|
|
/* we asked for a resume and we got it */
|
|
k->content_range = TRUE;
|
|
}
|
|
}
|
|
}
|
|
else if(data->cookies &&
|
|
strnequal("Set-Cookie:", k->p, 11)) {
|
|
Curl_cookie_add(data->cookies, TRUE, k->p+11, conn->name);
|
|
}
|
|
else if(strnequal("Last-Modified:", k->p,
|
|
strlen("Last-Modified:")) &&
|
|
(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 = k->timeofdoc;
|
|
}
|
|
else if ((k->httpcode >= 300 && k->httpcode < 400) &&
|
|
(data->set.http_follow_location) &&
|
|
strnequal("Location:", k->p, 9)) {
|
|
/* this is the URL that the server advices us to get instead */
|
|
char *ptr;
|
|
char *start=k->p;
|
|
char backup;
|
|
|
|
start += 9; /* pass "Location:" */
|
|
|
|
/* Skip spaces and tabs. We do this to support multiple
|
|
white spaces after the "Location:" keyword. */
|
|
while(*start && isspace((int)*start ))
|
|
start++;
|
|
ptr = start; /* start scanning here */
|
|
|
|
/* scan through the string to find the end */
|
|
while(*ptr && !isspace((int)*ptr))
|
|
ptr++;
|
|
backup = *ptr; /* store the ending letter */
|
|
*ptr = '\0'; /* zero terminate */
|
|
conn->newurl = strdup(start); /* clone string */
|
|
*ptr = backup; /* restore ending letter */
|
|
}
|
|
|
|
/*
|
|
* End of header-checks. Write them to the client.
|
|
*/
|
|
|
|
k->writetype = CLIENTWRITE_HEADER;
|
|
if (data->set.http_include_header)
|
|
k->writetype |= CLIENTWRITE_BODY;
|
|
|
|
if(data->set.verbose)
|
|
Curl_debug(data, CURLINFO_HEADER_IN,
|
|
k->p, k->hbuflen);
|
|
|
|
result = Curl_client_write(data, k->writetype, k->p,
|
|
k->hbuflen);
|
|
if(result)
|
|
return result;
|
|
|
|
data->info.header_size += k->hbuflen;
|
|
conn->headerbytecount += k->hbuflen;
|
|
|
|
/* reset hbufp pointer && hbuflen */
|
|
k->hbufp = data->state.headerbuff;
|
|
k->hbuflen = 0;
|
|
}
|
|
while (!stop_reading && *k->str); /* header line within buffer */
|
|
|
|
if(stop_reading)
|
|
/* We've stopped dealing with input, get out of the do-while loop */
|
|
break;
|
|
|
|
/* 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. */
|
|
|
|
if (!k->header) {
|
|
/* the next token and forward is not part of
|
|
the header! */
|
|
|
|
/* we subtract the remaining header size from the buffer */
|
|
nread -= (k->str - k->buf);
|
|
}
|
|
|
|
} /* end if header mode */
|
|
|
|
/* 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)) {
|
|
|
|
if(0 == k->bodywrites) {
|
|
/* These checks are only made the first time we are about to
|
|
write a piece of the body */
|
|
if(conn->protocol&PROT_HTTP) {
|
|
/* HTTP-only checks */
|
|
if (conn->newurl) {
|
|
/* abort after the headers if "follow Location" is set */
|
|
infof (data, "Follow to new URL: %s\n", conn->newurl);
|
|
k->keepon &= ~KEEP_READ;
|
|
FD_ZERO(&k->rkeepfd);
|
|
return CURLE_OK;
|
|
}
|
|
else if (conn->resume_from &&
|
|
!k->content_range &&
|
|
(data->set.httpreq==HTTPREQ_GET)) {
|
|
/* 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_HTTP_RANGE_ERROR;
|
|
}
|
|
else if(data->set.timecondition && !conn->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((k->timeofdoc > 0) && (data->set.timevalue > 0)) {
|
|
switch(data->set.timecondition) {
|
|
case TIMECOND_IFMODSINCE:
|
|
default:
|
|
if(k->timeofdoc < data->set.timevalue) {
|
|
infof(data,
|
|
"The requested document is not new enough\n");
|
|
return CURLE_OK;
|
|
}
|
|
break;
|
|
case TIMECOND_IFUNMODSINCE:
|
|
if(k->timeofdoc > data->set.timevalue) {
|
|
infof(data,
|
|
"The requested document is not old enough\n");
|
|
return CURLE_OK;
|
|
}
|
|
break;
|
|
} /* switch */
|
|
} /* two valid time strings */
|
|
} /* we have a time condition */
|
|
|
|
} /* this is HTTP */
|
|
} /* this is the first time we write a body part */
|
|
k->bodywrites++;
|
|
|
|
/* pass data to the debug function before it gets "dechunked" */
|
|
if(data->set.verbose)
|
|
Curl_debug(data, CURLINFO_DATA_IN, k->str, nread);
|
|
|
|
if(conn->bits.chunk) {
|
|
/*
|
|
* Bless me father for I have sinned. 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, "Received problem in the chunky parser");
|
|
return CURLE_RECV_ERROR;
|
|
}
|
|
else if(CHUNKE_STOP == res) {
|
|
/* we're done reading chunks! */
|
|
k->keepon &= ~KEEP_READ; /* read no more */
|
|
FD_ZERO(&k->rkeepfd);
|
|
|
|
/* There are now possibly N number of bytes at the end of the
|
|
str buffer that weren't written to the client, but we don't
|
|
care about them right now. */
|
|
}
|
|
/* If it returned OK, we just keep going */
|
|
}
|
|
|
|
if((-1 != conn->maxdownload) &&
|
|
(k->bytecount + nread >= conn->maxdownload)) {
|
|
nread = conn->maxdownload - k->bytecount;
|
|
if(nread < 0 ) /* this should be unusual */
|
|
nread = 0;
|
|
|
|
k->keepon &= ~KEEP_READ; /* we're done reading */
|
|
FD_ZERO(&k->rkeepfd);
|
|
}
|
|
|
|
k->bytecount += nread;
|
|
|
|
Curl_pgrsSetDownloadCounter(data, (double)k->bytecount);
|
|
|
|
if(!conn->bits.chunk && nread) {
|
|
/* If this is chunky transfer, it was already written */
|
|
result = Curl_client_write(data, CLIENTWRITE_BODY, k->str,
|
|
nread);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
} /* if (! header and data to read ) */
|
|
} /* if( read from socket ) */
|
|
|
|
/* If we still have writing to do, we check if we have a writable
|
|
socket. Sometimes the writefdp is NULL, it no fd_set was done using
|
|
the multi interface and then we can do nothing but to attempt a
|
|
write to be sure. */
|
|
if((k->keepon & KEEP_WRITE) &&
|
|
(FD_ISSET(conn->writesockfd, writefdp)) ) {
|
|
/* write */
|
|
|
|
int i, si;
|
|
ssize_t bytes_written;
|
|
|
|
if ((k->bytecount == 0) && (k->writebytecount == 0))
|
|
Curl_pgrsTime(data, TIMER_STARTTRANSFER);
|
|
|
|
didwhat |= KEEP_WRITE;
|
|
|
|
/* only read more data if there's no upload data already
|
|
present in the upload buffer */
|
|
if(0 == conn->upload_present) {
|
|
/* init the "upload from here" pointer */
|
|
conn->upload_fromhere = k->uploadbuf;
|
|
|
|
nread = data->set.fread(conn->upload_fromhere, 1,
|
|
BUFSIZE, data->set.in);
|
|
|
|
/* the signed int typecase of nread of for systems that has
|
|
unsigned size_t */
|
|
if (nread<=0) {
|
|
/* done */
|
|
k->keepon &= ~KEEP_WRITE; /* we're done writing */
|
|
FD_ZERO(&k->wkeepfd);
|
|
break;
|
|
}
|
|
|
|
/* store number of bytes available for upload */
|
|
conn->upload_present = nread;
|
|
|
|
/* convert LF to CRLF if so asked */
|
|
if (data->set.crlf) {
|
|
for(i = 0, si = 0; i < nread; i++, si++) {
|
|
if (conn->upload_fromhere[i] == 0x0a) {
|
|
data->state.scratch[si++] = 0x0d;
|
|
data->state.scratch[si] = 0x0a;
|
|
}
|
|
else
|
|
data->state.scratch[si] = conn->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 */
|
|
conn->upload_fromhere = data->state.scratch;
|
|
|
|
/* set the new amount too */
|
|
conn->upload_present = nread;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
/* We have a partial buffer left from a previous "round". Use
|
|
that instead of reading more data */
|
|
}
|
|
|
|
/* write to socket */
|
|
result = Curl_write(conn,
|
|
conn->writesockfd,
|
|
conn->upload_fromhere,
|
|
conn->upload_present,
|
|
&bytes_written);
|
|
if(result)
|
|
return result;
|
|
else if(conn->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 */
|
|
conn->upload_present -= bytes_written;
|
|
|
|
/* advance the pointer where to find the buffer when the next send
|
|
is to happen */
|
|
conn->upload_fromhere += bytes_written;
|
|
}
|
|
else {
|
|
/* we've uploaded that buffer now */
|
|
conn->upload_fromhere = k->uploadbuf;
|
|
conn->upload_present = 0; /* no more bytes left */
|
|
}
|
|
|
|
if(data->set.verbose)
|
|
Curl_debug(data, CURLINFO_DATA_OUT, conn->upload_fromhere,
|
|
bytes_written);
|
|
|
|
|
|
k->writebytecount += bytes_written;
|
|
Curl_pgrsSetUploadCounter(data, (double)k->writebytecount);
|
|
|
|
}
|
|
|
|
} while(0); /* just to break out from! */
|
|
|
|
if(didwhat) {
|
|
/* Update read/write counters */
|
|
if(conn->bytecountp)
|
|
*conn->bytecountp = k->bytecount; /* read count */
|
|
if(conn->writebytecountp)
|
|
*conn->writebytecountp = k->writebytecount; /* write count */
|
|
}
|
|
else {
|
|
/* no read no write, this is a timeout? */
|
|
if (k->write_after_100_header) {
|
|
/* This should allow some time for the header to arrive, but only a
|
|
very short time as otherwise it'll be too much wasted times too
|
|
often. */
|
|
k->write_after_100_header = FALSE;
|
|
FD_SET (conn->writesockfd, &k->writefd); /* write socket */
|
|
k->keepon |= KEEP_WRITE;
|
|
k->wkeepfd = k->writefd;
|
|
}
|
|
}
|
|
|
|
k->now = Curl_tvnow();
|
|
if(Curl_pgrsUpdate(conn))
|
|
result = CURLE_ABORTED_BY_CALLBACK;
|
|
else
|
|
result = Curl_speedcheck (data, k->now);
|
|
if (result)
|
|
return result;
|
|
|
|
if (data->set.timeout &&
|
|
((Curl_tvdiff(k->now, k->start)/1000) >= data->set.timeout)) {
|
|
failf (data, "Operation timed out with %d out of %d bytes received",
|
|
k->bytecount, conn->size);
|
|
return CURLE_OPERATION_TIMEOUTED;
|
|
}
|
|
|
|
if(!k->keepon) {
|
|
/*
|
|
* The transfer has been performed. Just make some general checks before
|
|
* returning.
|
|
*/
|
|
|
|
if(!(data->set.no_body) && k->contentlength &&
|
|
(k->bytecount != k->contentlength) &&
|
|
!conn->newurl) {
|
|
failf(data, "transfer closed with %d bytes remaining to read",
|
|
k->contentlength-k->bytecount);
|
|
return CURLE_PARTIAL_FILE;
|
|
}
|
|
else if(conn->bits.chunk && conn->proto.http->chunk.datasize) {
|
|
failf(data, "transfer closed with at least %d bytes remaining",
|
|
conn->proto.http->chunk.datasize);
|
|
return CURLE_PARTIAL_FILE;
|
|
}
|
|
if(Curl_pgrsUpdate(conn))
|
|
return CURLE_ABORTED_BY_CALLBACK;
|
|
}
|
|
|
|
/* Now update the "done" boolean we return */
|
|
*done = !k->keepon;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_readwrite_init(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct Curl_transfer_keeper *k = &conn->keep;
|
|
|
|
memset(k, 0, sizeof(struct Curl_transfer_keeper));
|
|
|
|
k->start = Curl_tvnow(); /* start time */
|
|
k->now = k->start; /* current time is now */
|
|
k->header = TRUE; /* assume header */
|
|
k->httpversion = -1; /* unknown at this point */
|
|
|
|
data = conn->data; /* there's the root struct */
|
|
k->buf = data->state.buffer;
|
|
k->uploadbuf = data->state.uploadbuffer;
|
|
k->maxfd = (conn->sockfd>conn->writesockfd?
|
|
conn->sockfd:conn->writesockfd)+1;
|
|
k->hbufp = data->state.headerbuff;
|
|
|
|
Curl_pgrsTime(data, TIMER_PRETRANSFER);
|
|
Curl_speedinit(data);
|
|
|
|
Curl_pgrsSetUploadCounter(data, 0);
|
|
Curl_pgrsSetDownloadCounter(data, 0);
|
|
|
|
if (!conn->getheader) {
|
|
k->header = FALSE;
|
|
if(conn->size > 0)
|
|
Curl_pgrsSetDownloadSize(data, conn->size);
|
|
}
|
|
/* we want header and/or body, if neither then don't do this! */
|
|
if(conn->getheader || !data->set.no_body) {
|
|
|
|
FD_ZERO (&k->readfd); /* clear it */
|
|
if(conn->sockfd != -1) {
|
|
FD_SET (conn->sockfd, &k->readfd); /* read socket */
|
|
k->keepon |= KEEP_READ;
|
|
}
|
|
|
|
FD_ZERO (&k->writefd); /* clear it */
|
|
if(conn->writesockfd != -1) {
|
|
if (data->set.expect100header)
|
|
/* wait with write until we either got 100-continue or a timeout */
|
|
k->write_after_100_header = TRUE;
|
|
else {
|
|
FD_SET (conn->writesockfd, &k->writefd); /* write socket */
|
|
k->keepon |= KEEP_WRITE;
|
|
}
|
|
}
|
|
|
|
/* get these in backup variables to be able to restore them on each lap in
|
|
the select() loop */
|
|
k->rkeepfd = k->readfd;
|
|
k->wkeepfd = k->writefd;
|
|
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
void Curl_single_fdset(struct connectdata *conn,
|
|
fd_set *read_fd_set,
|
|
fd_set *write_fd_set,
|
|
fd_set *exc_fd_set,
|
|
int *max_fd)
|
|
{
|
|
*max_fd = -1; /* init */
|
|
if(conn->keep.keepon & KEEP_READ) {
|
|
FD_SET(conn->sockfd, read_fd_set);
|
|
*max_fd = conn->sockfd;
|
|
conn->keep.readfdp = read_fd_set; /* store the address of the set */
|
|
}
|
|
if(conn->keep.keepon & KEEP_WRITE) {
|
|
FD_SET(conn->writesockfd, write_fd_set);
|
|
if(conn->writesockfd > *max_fd)
|
|
*max_fd = conn->writesockfd;
|
|
conn->keep.writefdp = write_fd_set; /* store the address of the set */
|
|
}
|
|
/* we don't use exceptions, only touch that one to prevent compiler
|
|
warnings! */
|
|
*exc_fd_set = *exc_fd_set;
|
|
}
|
|
|
|
|
|
/*
|
|
* Transfer()
|
|
*
|
|
* This function is what performs the actual transfer. It is capable of
|
|
* doing both ways simultaneously.
|
|
* The transfer must already have been setup by a call to Curl_Transfer().
|
|
*
|
|
* Note that headers are created in a preallocated buffer of a default size.
|
|
* That buffer can be enlarged on demand, but it is never shrinken again.
|
|
*
|
|
* Parts of this function was once written by the friendly Mark Butler
|
|
* <butlerm@xmission.com>.
|
|
*/
|
|
|
|
static CURLcode
|
|
Transfer(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
CURLcode result;
|
|
struct Curl_transfer_keeper *k = &conn->keep;
|
|
bool done=FALSE;
|
|
|
|
Curl_readwrite_init(conn);
|
|
|
|
if((conn->sockfd == -1) && (conn->writesockfd == -1))
|
|
/* nothing to read, nothing to write, we're already OK! */
|
|
return CURLE_OK;
|
|
|
|
/* we want header and/or body, if neither then don't do this! */
|
|
if(!conn->getheader && data->set.no_body)
|
|
return CURLE_OK;
|
|
|
|
k->writefdp = &k->writefd; /* store the address of the set */
|
|
k->readfdp = &k->readfd; /* store the address of the set */
|
|
|
|
while (!done) {
|
|
struct timeval interval;
|
|
k->readfd = k->rkeepfd; /* set these every lap in the loop */
|
|
k->writefd = k->wkeepfd;
|
|
interval.tv_sec = 1;
|
|
interval.tv_usec = 0;
|
|
|
|
switch (select (k->maxfd, k->readfdp, k->writefdp, NULL, &interval)) {
|
|
case -1: /* select() error, stop reading */
|
|
#ifdef EINTR
|
|
/* The EINTR is not serious, and it seems you might get this more
|
|
ofen when using the lib in a multi-threaded environment! */
|
|
if(errno == EINTR)
|
|
;
|
|
else
|
|
#endif
|
|
done = TRUE; /* no more read or write */
|
|
continue;
|
|
case 0: /* timeout */
|
|
result = Curl_readwrite(conn, &done);
|
|
break;
|
|
|
|
default: /* readable descriptors */
|
|
result = Curl_readwrite(conn, &done);
|
|
break;
|
|
}
|
|
if(result)
|
|
return result;
|
|
|
|
/* "done" signals to us if the transfer(s) are ready */
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_pretransfer(struct SessionHandle *data)
|
|
{
|
|
if(!data->change.url)
|
|
/* we can't do anything wihout URL */
|
|
return CURLE_URL_MALFORMAT;
|
|
|
|
#ifdef USE_SSLEAY
|
|
/* Init the SSL session ID cache here. We do it here since we want to
|
|
do it after the *_setopt() calls (that could change the size) but
|
|
before any transfer. */
|
|
Curl_SSL_InitSessions(data, data->set.ssl.numsessions);
|
|
#endif
|
|
|
|
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 */
|
|
|
|
/* 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)
|
|
/*************************************************************
|
|
* 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_pgrsStartNow(data);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_posttransfer(struct SessionHandle *data)
|
|
{
|
|
#if defined(HAVE_SIGNAL) && defined(SIGPIPE)
|
|
/* restore the signal handler for SIGPIPE before we get back */
|
|
if(!data->set.no_signal)
|
|
signal(SIGPIPE, data->state.prev_signal);
|
|
#endif
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_perform(struct SessionHandle *data)
|
|
{
|
|
CURLcode res;
|
|
CURLcode res2;
|
|
struct connectdata *conn=NULL;
|
|
char *newurl = NULL; /* possibly a new URL to follow to! */
|
|
|
|
data->state.used_interface = Curl_if_easy;
|
|
|
|
res = Curl_pretransfer(data);
|
|
if(res)
|
|
return res;
|
|
|
|
/*
|
|
* It is important that there is NO 'return' from this function any any
|
|
* other place than falling down the bottom! This is because we have cleanup
|
|
* stuff that must be done before we get back, and that is only performed
|
|
* after this do-while loop.
|
|
*/
|
|
|
|
do {
|
|
Curl_pgrsTime(data, TIMER_STARTSINGLE);
|
|
res = Curl_connect(data, &conn);
|
|
if(res == CURLE_OK) {
|
|
res = Curl_do(&conn);
|
|
|
|
if(res == CURLE_OK) {
|
|
CURLcode res2; /* just a local extra result container */
|
|
|
|
if(conn->protocol&PROT_FTPS)
|
|
/* FTPS, disable ssl while transfering data */
|
|
conn->ssl.use = FALSE;
|
|
res = Transfer(conn); /* now fetch that URL please */
|
|
if(conn->protocol&PROT_FTPS)
|
|
/* FTPS, enable ssl again after havving transferred data */
|
|
conn->ssl.use = TRUE;
|
|
|
|
if(res == CURLE_OK)
|
|
/*
|
|
* We must duplicate the new URL here as the connection data
|
|
* may be free()ed in the Curl_done() function.
|
|
*/
|
|
newurl = conn->newurl?strdup(conn->newurl):NULL;
|
|
else {
|
|
/* The transfer phase returned error, we mark the connection to get
|
|
* closed to prevent being re-used. This is becasue we can't
|
|
* possibly know if the connection is in a good shape or not now. */
|
|
conn->bits.close = TRUE;
|
|
|
|
if(-1 !=conn->secondarysocket) {
|
|
/* if we failed anywhere, we must clean up the secondary socket if
|
|
it was used */
|
|
sclose(conn->secondarysocket);
|
|
conn->secondarysocket=-1;
|
|
}
|
|
}
|
|
|
|
/* Always run Curl_done(), even if some of the previous calls
|
|
failed, but return the previous (original) error code */
|
|
res2 = Curl_done(conn);
|
|
|
|
if(CURLE_OK == res)
|
|
res = res2;
|
|
}
|
|
|
|
/*
|
|
* Important: 'conn' cannot be used here, since it may have been closed
|
|
* in 'Curl_done' or other functions.
|
|
*/
|
|
|
|
if((res == CURLE_OK) && newurl) {
|
|
/* Location: redirect
|
|
|
|
This is assumed to happen for HTTP(S) only!
|
|
*/
|
|
char prot[16]; /* URL protocol string storage */
|
|
char letter; /* used for a silly sscanf */
|
|
|
|
if (data->set.maxredirs && (data->set.followlocation >= data->set.maxredirs)) {
|
|
failf(data,"Maximum (%d) redirects followed", data->set.maxredirs);
|
|
res=CURLE_TOO_MANY_REDIRECTS;
|
|
break;
|
|
}
|
|
|
|
/* 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)
|
|
/* If we already have an allocated referer, free this first */
|
|
free(data->change.referer);
|
|
|
|
data->change.referer = strdup(data->change.url);
|
|
data->change.referer_alloc = TRUE; /* yes, free this later */
|
|
}
|
|
|
|
if(2 != sscanf(newurl, "%15[^?&/:]://%c", prot, &letter)) {
|
|
/***
|
|
*DANG* this is an RFC 2068 violation. The URL is supposed
|
|
to be absolute and this doesn't seem to be that!
|
|
***
|
|
Instead, we have to 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 *protsep;
|
|
char *pathsep;
|
|
char *newest;
|
|
|
|
/* we must make our own copy of the URL to play with, as it may
|
|
point to read-only data */
|
|
char *url_clone=strdup(data->change.url);
|
|
|
|
if(!url_clone) {
|
|
res = CURLE_OUT_OF_MEMORY;
|
|
break; /* skip out of this loop 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('/' != newurl[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 = strrchr(protsep, '?');
|
|
if(pathsep)
|
|
*pathsep=0;
|
|
|
|
/* we have a relative path to append to the last slash if
|
|
there's one available */
|
|
pathsep = strrchr(protsep, '/');
|
|
if(pathsep)
|
|
*pathsep=0;
|
|
}
|
|
else {
|
|
/* We got a new absolute path for this server, cut off from the
|
|
first slash */
|
|
pathsep = strchr(protsep, '/');
|
|
if(pathsep)
|
|
*pathsep=0;
|
|
}
|
|
|
|
newest=(char *)malloc( strlen(url_clone) +
|
|
1 + /* possible slash */
|
|
strlen(newurl) + 1/* zero byte */);
|
|
|
|
if(!newest) {
|
|
res = CURLE_OUT_OF_MEMORY;
|
|
break; /* go go go out from this loop */
|
|
}
|
|
sprintf(newest, "%s%s%s", url_clone, ('/' == newurl[0])?"":"/",
|
|
newurl);
|
|
free(newurl);
|
|
free(url_clone);
|
|
newurl = newest;
|
|
}
|
|
else
|
|
/* This is an absolute URL, don't allow the custom port number */
|
|
data->state.allow_port = FALSE;
|
|
|
|
if(data->change.url_alloc)
|
|
free(data->change.url);
|
|
else
|
|
data->change.url_alloc = TRUE; /* the URL is allocated */
|
|
|
|
/* TBD: set the URL with curl_setopt() */
|
|
data->change.url = newurl;
|
|
newurl = NULL; /* don't free! */
|
|
|
|
infof(data, "Follows Location: to new URL: '%s'\n", data->change.url);
|
|
|
|
/*
|
|
* We get here when the HTTP code is 300-399. We need to perform
|
|
* differently based on exactly what return code there was.
|
|
* Discussed on the curl mailing list and posted about on the 26th
|
|
* of January 2001.
|
|
*/
|
|
switch(data->info.httpcode) {
|
|
case 300: /* Multiple Choices */
|
|
case 306: /* Not used */
|
|
case 307: /* Temporary Redirect */
|
|
default: /* for all unknown ones */
|
|
/* These are explicitly mention since I've checked RFC2616 and they
|
|
* seem to be OK to POST to.
|
|
*/
|
|
break;
|
|
case 301: /* Moved Permanently */
|
|
/* (quote from RFC2616, section 10.3.2):
|
|
*
|
|
* Note: When automatically redirecting a POST request after
|
|
* receiving a 301 status code, some existing HTTP/1.0 user agents
|
|
* will erroneously change it into a GET request.
|
|
*
|
|
* ----
|
|
* Warning: Because most of importants user agents do this clear
|
|
* RFC2616 violation, many webservers expect this misbehavior. 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:
|
|
*/
|
|
if( data->set.httpreq == HTTPREQ_POST
|
|
|| data->set.httpreq == HTTPREQ_POST_FORM) {
|
|
infof(data,
|
|
"Violate RFC 2616/10.3.2 and switch from POST to GET\n");
|
|
data->set.httpreq = HTTPREQ_GET;
|
|
}
|
|
break;
|
|
case 302: /* Found */
|
|
/* (From 10.3.3)
|
|
|
|
Note: RFC 1945 and RFC 2068 specify that the client is not allowed
|
|
to change the method on the redirected request. However, most
|
|
existing user agent implementations treat 302 as if it were a 303
|
|
response, performing a GET on the Location field-value regardless
|
|
of the original request method. The status codes 303 and 307 have
|
|
been added for servers that wish to make unambiguously clear which
|
|
kind of reaction is expected of the client.
|
|
|
|
(From 10.3.4)
|
|
|
|
Note: Many pre-HTTP/1.1 user agents do not understand the 303
|
|
status. When interoperability with such clients is a concern, the
|
|
302 status code may be used instead, since most user agents react
|
|
to a 302 response as described here for 303.
|
|
*/
|
|
case 303: /* See Other */
|
|
/* Disable both types of POSTs, since doing a second POST when
|
|
* following isn't what anyone would want! */
|
|
if(data->set.httpreq != HTTPREQ_GET) {
|
|
data->set.httpreq = HTTPREQ_GET; /* enforce GET request */
|
|
infof(data, "Disables POST, goes with %s\n",
|
|
data->set.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_pgrsResetTimes(data);
|
|
continue;
|
|
}
|
|
}
|
|
break; /* it only reaches here when this shouldn't loop */
|
|
|
|
} while(1); /* loop if Location: */
|
|
|
|
if(newurl)
|
|
free(newurl);
|
|
|
|
/* run post-transfer uncondionally, but don't clobber the return code if
|
|
we already have an error code recorder */
|
|
res2 = Curl_posttransfer(data);
|
|
if(!res && res2)
|
|
res = res2;
|
|
|
|
return res;
|
|
}
|
|
|
|
CURLcode
|
|
Curl_Transfer(struct connectdata *c_conn, /* connection data */
|
|
int sockfd, /* socket to read from or -1 */
|
|
int size, /* -1 if unknown at this point */
|
|
bool getheader, /* TRUE if header parsing is wanted */
|
|
long *bytecountp, /* return number of bytes read or NULL */
|
|
int writesockfd, /* socket to write to, it may very well be
|
|
the same we read from. -1 disables */
|
|
long *writebytecountp /* return number of bytes written or
|
|
NULL */
|
|
)
|
|
{
|
|
struct connectdata *conn = (struct connectdata *)c_conn;
|
|
if(!conn)
|
|
return CURLE_BAD_FUNCTION_ARGUMENT;
|
|
|
|
/* now copy all input parameters */
|
|
conn->sockfd = sockfd;
|
|
conn->size = size;
|
|
conn->getheader = getheader;
|
|
conn->bytecountp = bytecountp;
|
|
conn->writesockfd = writesockfd;
|
|
conn->writebytecountp = writebytecountp;
|
|
|
|
return CURLE_OK;
|
|
|
|
}
|
|
|
|
/*
|
|
* local variables:
|
|
* eval: (load-file "../curl-mode.el")
|
|
* end:
|
|
* vim600: fdm=marker
|
|
* vim: et sw=2 ts=2 sts=2 tw=78
|
|
*/
|