736 lines
24 KiB
C
736 lines
24 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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* The contents of this file are subject to the Mozilla Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Curl.
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*
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* The Initial Developer of the Original Code is Daniel Stenberg.
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*
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* Portions created by the Initial Developer are Copyright (C) 1998.
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* All Rights Reserved.
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*
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* ------------------------------------------------------------
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* Main author:
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* - Daniel Stenberg <daniel@haxx.se>
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*
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* http://curl.haxx.se
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*
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* $Source$
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* $Revision$
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* $Date$
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* $Author$
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* $State$
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* $Locker$
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*
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* ------------------------------------------------------------
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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 "getenv.h"
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#include "hostip.h"
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#include "download.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 "writeout.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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CURLcode
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_Transfer(struct connectdata *c_conn)
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{
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size_t nread; /* number of bytes read */
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int bytecount = 0; /* total number of bytes read */
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int writebytecount = 0; /* number of bytes written */
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long contentlength=0; /* size of incoming data */
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struct timeval start = tvnow();
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struct timeval now = start; /* current time */
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bool header = TRUE; /* incoming data has HTTP header */
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int headerline = 0; /* counts header lines to better track the
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first one */
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char *hbufp; /* points at *end* of header line */
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int hbuflen = 0;
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char *str; /* within buf */
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char *str_start; /* within buf */
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char *end_ptr; /* within buf */
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char *p; /* within headerbuff */
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bool content_range = FALSE; /* set TRUE if Content-Range: was found */
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int offset = 0; /* possible resume offset read from the
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Content-Range: header */
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int code = 0; /* error code from the 'HTTP/1.? XXX' line */
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/* for the low speed checks: */
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CURLcode urg;
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time_t timeofdoc=0;
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long bodywrites=0;
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char newurl[URL_MAX_LENGTH]; /* buffer for Location: URL */
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/* the highest fd we use + 1 */
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struct UrlData *data;
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struct connectdata *conn = (struct connectdata *)c_conn;
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char *buf;
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int maxfd;
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if(!conn || (conn->handle != STRUCT_CONNECT))
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return CURLE_BAD_FUNCTION_ARGUMENT;
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data = conn->data; /* there's the root struct */
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buf = data->buffer;
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maxfd = (conn->sockfd>conn->writesockfd?conn->sockfd:conn->writesockfd)+1;
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hbufp = data->headerbuff;
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myalarm (0); /* switch off the alarm-style timeout */
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now = tvnow();
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start = now;
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#define KEEP_READ 1
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#define KEEP_WRITE 2
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pgrsTime(data, TIMER_PRETRANSFER);
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if (!conn->getheader) {
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header = FALSE;
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if(conn->size > 0)
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pgrsSetDownloadSize(data, conn->size);
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}
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/* we want header and/or body, if neither then don't do this! */
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if(conn->getheader ||
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!data->bits.no_body) {
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fd_set readfd;
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fd_set writefd;
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fd_set rkeepfd;
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fd_set wkeepfd;
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struct timeval interval;
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int keepon=0;
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/* timeout every X second
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- makes a better progressmeter (i.e even when no data is read, the
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meter can be updated and reflect reality)
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- allows removal of the alarm() crap
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- variable timeout is easier
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*/
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FD_ZERO (&readfd); /* clear it */
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if(conn->sockfd != -1) {
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FD_SET (conn->sockfd, &readfd); /* read socket */
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keepon |= KEEP_READ;
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}
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FD_ZERO (&writefd); /* clear it */
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if(conn->writesockfd != -1) {
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FD_SET (conn->writesockfd, &writefd); /* write socket */
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keepon |= KEEP_WRITE;
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}
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/* get these in backup variables to be able to restore them on each lap in
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the select() loop */
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rkeepfd = readfd;
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wkeepfd = writefd;
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while (keepon) {
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readfd = rkeepfd; /* set those every lap in the loop */
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writefd = wkeepfd;
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interval.tv_sec = 1;
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interval.tv_usec = 0;
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switch (select (maxfd, &readfd, &writefd, NULL, &interval)) {
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case -1: /* select() error, stop reading */
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#ifdef EINTR
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/* The EINTR is not serious, and it seems you might get this more
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ofen when using the lib in a multi-threaded environment! */
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if(errno == EINTR)
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;
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else
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#endif
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keepon = 0; /* no more read or write */
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continue;
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case 0: /* timeout */
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break;
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default:
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if((keepon & KEEP_READ) && FD_ISSET(conn->sockfd, &readfd)) {
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/* read! */
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urg = curl_read(conn, buf, BUFSIZE -1, &nread);
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/* NULL terminate, allowing string ops to be used */
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if (0 < (signed int) nread)
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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 >= (signed int) nread) {
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keepon &= ~KEEP_READ;
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break;
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}
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str = buf; /* Default buffer to use when we write the
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buffer, it may be changed in the flow below
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before the actual storing is done. */
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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 (header) {
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/* we are in parse-the-header-mode */
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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 = str; /* str_start is start of line within buf */
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end_ptr = strchr (str_start, '\n');
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if (!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(str);
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if (hbuflen + (int)str_length >= data->headersize) {
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char *newbuff;
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long newsize=MAX((hbuflen+str_length)*3/2,
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data->headersize*2);
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hbufp_index = hbufp - data->headerbuff;
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newbuff = (char *)realloc(data->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_READ_ERROR;
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}
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data->headersize=newsize;
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data->headerbuff = newbuff;
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hbufp = data->headerbuff + hbufp_index;
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}
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strcpy (hbufp, str);
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hbufp += strlen (str);
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hbuflen += strlen (str);
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break; /* read more and try again */
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}
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str = end_ptr + 1; /* move just past new line */
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if (hbuflen + (str - str_start) >= data->headersize) {
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char *newbuff;
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long newsize=MAX((hbuflen+(str-str_start))*3/2,
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data->headersize*2);
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hbufp_index = hbufp - data->headerbuff;
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newbuff = (char *)realloc(data->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_READ_ERROR;
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}
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data->headersize= newsize;
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data->headerbuff = newbuff;
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hbufp = data->headerbuff + hbufp_index;
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}
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/* copy to end of line */
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strncpy (hbufp, str_start, str - str_start);
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hbufp += str - str_start;
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hbuflen += str - str_start;
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*hbufp = 0;
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p = data->headerbuff;
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/* we now have a full line that p points to */
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if (('\n' == *p) || ('\r' == *p)) {
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/* Zero-length line means end of header! */
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if (-1 != conn->size) /* if known */
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conn->size += bytecount; /* we append the already read size */
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if ('\r' == *p)
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p++; /* pass the \r byte */
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if ('\n' == *p)
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p++; /* pass the \n byte */
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pgrsSetDownloadSize(data, conn->size);
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header = FALSE; /* no more header to parse! */
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/* now, only output this if the header AND body are requested:
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*/
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if (data->bits.http_include_header) {
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if((p - data->headerbuff) !=
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data->fwrite (data->headerbuff, 1,
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p - data->headerbuff, data->out)) {
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failf (data, "Failed writing output");
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return CURLE_WRITE_ERROR;
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}
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}
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if(data->writeheader) {
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/* obviously, the header is requested to be written to
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this file: */
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if((p - data->headerbuff) !=
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data->fwrite (data->headerbuff, 1, p - data->headerbuff,
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data->writeheader)) {
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failf (data, "Failed writing output");
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return CURLE_WRITE_ERROR;
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}
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}
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break; /* exit header line loop */
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}
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if (!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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if (sscanf (p, " HTTP/1.%*c %3d", &code)) {
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/* 404 -> URL not found! */
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if (
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( ((data->bits.http_follow_location) && (code >= 400))
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||
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(!data->bits.http_follow_location && (code >= 300)))
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&& (data->bits.http_fail_on_error)) {
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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: */
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/* 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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data->progress.httpcode = code;
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}
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else {
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header = FALSE; /* this is not a header line */
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break;
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}
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}
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/* check for Content-Length: header lines to get size */
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if (strnequal("Content-Length", p, 14) &&
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sscanf (p+14, ": %ld", &contentlength))
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conn->size = contentlength;
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else if (strnequal("Content-Range", p, 13)) {
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if (sscanf (p+13, ": bytes %d-", &offset) ||
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sscanf (p+13, ": bytes: %d-", &offset)) {
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/* This second format was added August 1st by Igor
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Khristophorov since Sun's webserver JavaWebServer/1.1.1
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obviously sends the header this way! :-( */
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if (data->resume_from == offset) {
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/* we asked for a resume and we got it */
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content_range = TRUE;
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}
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}
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}
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else if(data->cookies &&
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strnequal("Set-Cookie: ", p, 11)) {
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cookie_add(data->cookies, TRUE, &p[12]);
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}
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else if(strnequal("Last-Modified:", p,
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strlen("Last-Modified:")) &&
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data->timecondition) {
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time_t secs=time(NULL);
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timeofdoc = curl_getdate(p+strlen("Last-Modified:"), &secs);
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}
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else if ((code >= 300 && code < 400) &&
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(data->bits.http_follow_location) &&
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strnequal("Location", p, 8) &&
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sscanf (p+8, ": %" URL_MAX_LENGTH_TXT "s",
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newurl)) {
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/* this is the URL that the server advices us to get
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instead */
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data->newurl = strdup (newurl);
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}
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if (data->bits.http_include_header) {
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if(hbuflen != data->fwrite (p, 1, hbuflen, data->out)) {
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failf (data, "Failed writing output");
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return CURLE_WRITE_ERROR;
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}
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}
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if(data->writeheader) {
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/* the header is requested to be written to this file */
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if(hbuflen != data->fwrite (p, 1, hbuflen,
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data->writeheader)) {
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failf (data, "Failed writing output");
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return CURLE_WRITE_ERROR;
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}
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}
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/* reset hbufp pointer && hbuflen */
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hbufp = data->headerbuff;
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hbuflen = 0;
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}
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while (*str); /* header line within buffer */
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/* We might have reached the end of the header part here, but
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there might be a non-header part left in the end of the read
|
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buffer. */
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|
|
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if (!header) {
|
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/* the next token and forward is not part of
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the header! */
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/* we subtract the remaining header size from the buffer */
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nread -= (str - buf);
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}
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} /* end if header mode */
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/* This is not an 'else if' since it may be a rest from the header
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parsing, where the beginning of the buffer is headers and the end
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is non-headers. */
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if (str && !header && ((signed int)nread > 0)) {
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|
|
if(0 == bodywrites) {
|
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/* These checks are only made the first time we are about to
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write a chunk of the body */
|
|
if(conn->protocol&PROT_HTTP) {
|
|
/* HTTP-only checks */
|
|
if (data->resume_from && !content_range ) {
|
|
/* we wanted to resume a download, although the server
|
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doesn't seem to support this */
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failf (data, "HTTP server doesn't seem to support byte ranges. Cannot resume.");
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return CURLE_HTTP_RANGE_ERROR;
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}
|
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else if (data->newurl) {
|
|
/* abort after the headers if "follow Location" is set */
|
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infof (data, "Follow to new URL: %s\n", data->newurl);
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return CURLE_OK;
|
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}
|
|
else if(data->timecondition && !data->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((timeofdoc > 0) && (data->timevalue > 0)) {
|
|
switch(data->timecondition) {
|
|
case TIMECOND_IFMODSINCE:
|
|
default:
|
|
if(timeofdoc < data->timevalue) {
|
|
infof(data,
|
|
"The requested document is not new enough");
|
|
return CURLE_OK;
|
|
}
|
|
break;
|
|
case TIMECOND_IFUNMODSINCE:
|
|
if(timeofdoc > data->timevalue) {
|
|
infof(data,
|
|
"The requested document is not old enough");
|
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return CURLE_OK;
|
|
}
|
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break;
|
|
} /* switch */
|
|
} /* two valid time strings */
|
|
} /* we have a time condition */
|
|
} /* this is HTTP */
|
|
} /* this is the first time we write a body part */
|
|
bodywrites++;
|
|
|
|
if(data->maxdownload &&
|
|
(bytecount + nread > data->maxdownload)) {
|
|
nread = data->maxdownload - bytecount;
|
|
if((signed int)nread < 0 ) /* this should be unusual */
|
|
nread = 0;
|
|
keepon &= ~KEEP_READ; /* we're done reading */
|
|
}
|
|
|
|
bytecount += nread;
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|
|
pgrsSetDownloadCounter(data, (double)bytecount);
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|
|
|
if (nread != data->fwrite (str, 1, nread, data->out)) {
|
|
failf (data, "Failed writing output");
|
|
return CURLE_WRITE_ERROR;
|
|
}
|
|
|
|
} /* if (! header and data to read ) */
|
|
} /* if( read from socket ) */
|
|
|
|
if((keepon & KEEP_WRITE) && FD_ISSET(conn->writesockfd, &writefd)) {
|
|
/* write */
|
|
|
|
char scratch[BUFSIZE * 2];
|
|
int i, si;
|
|
size_t bytes_written;
|
|
|
|
if(data->crlf)
|
|
buf = data->buffer; /* put it back on the buffer */
|
|
|
|
nread = data->fread(buf, 1, BUFSIZE, data->in);
|
|
|
|
/* the signed int typecase of nread of for systems that has
|
|
unsigned size_t */
|
|
if ((signed int)nread<=0) {
|
|
/* done */
|
|
keepon &= ~KEEP_WRITE; /* we're done writing */
|
|
break;
|
|
}
|
|
writebytecount += nread;
|
|
pgrsSetUploadCounter(data, (double)writebytecount);
|
|
|
|
/* convert LF to CRLF if so asked */
|
|
if (data->crlf) {
|
|
for(i = 0, si = 0; i < (int)nread; i++, si++) {
|
|
if (buf[i] == 0x0a) {
|
|
scratch[si++] = 0x0d;
|
|
scratch[si] = 0x0a;
|
|
}
|
|
else {
|
|
scratch[si] = buf[i];
|
|
}
|
|
}
|
|
nread = si;
|
|
buf = scratch; /* point to the new buffer */
|
|
}
|
|
|
|
/* write to socket */
|
|
urg = curl_write(conn, buf, nread, &bytes_written);
|
|
|
|
if(nread != bytes_written) {
|
|
failf(data, "Failed uploading data");
|
|
return CURLE_WRITE_ERROR;
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
now = tvnow();
|
|
if(pgrsUpdate(data))
|
|
urg = CURLE_ABORTED_BY_CALLBACK;
|
|
else
|
|
urg = speedcheck (data, now);
|
|
if (urg)
|
|
return urg;
|
|
|
|
if (data->timeout && (tvdiff (now, start) > data->timeout)) {
|
|
failf (data, "Operation timed out with %d out of %d bytes received",
|
|
bytecount, conn->size);
|
|
return CURLE_OPERATION_TIMEOUTED;
|
|
}
|
|
}
|
|
}
|
|
if(!(data->bits.no_body) && contentlength &&
|
|
(bytecount != contentlength)) {
|
|
failf(data, "transfer closed with %d bytes remaining to read",
|
|
contentlength-bytecount);
|
|
return CURLE_PARTIAL_FILE;
|
|
}
|
|
if(pgrsUpdate(data))
|
|
return CURLE_ABORTED_BY_CALLBACK;
|
|
|
|
if(conn->bytecountp)
|
|
*conn->bytecountp = bytecount; /* read count */
|
|
if(conn->writebytecountp)
|
|
*conn->writebytecountp = writebytecount; /* write count */
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
typedef int (*func_T)(void);
|
|
|
|
CURLcode curl_transfer(CURL *curl)
|
|
{
|
|
CURLcode res;
|
|
struct UrlData *data = curl;
|
|
struct connectdata *c_connect;
|
|
|
|
pgrsStartNow(data);
|
|
|
|
do {
|
|
res = curl_connect(curl, (CURLconnect **)&c_connect);
|
|
if(res == CURLE_OK) {
|
|
res = curl_do(c_connect);
|
|
if(res == CURLE_OK) {
|
|
res = _Transfer(c_connect); /* now fetch that URL please */
|
|
if(res == CURLE_OK)
|
|
res = curl_done(c_connect);
|
|
}
|
|
|
|
if((res == CURLE_OK) && data->newurl) {
|
|
/* Location: redirect */
|
|
char prot[16];
|
|
char path[URL_MAX_LENGTH];
|
|
|
|
/* mark the next request as a followed location: */
|
|
data->bits.this_is_a_follow = TRUE;
|
|
|
|
if(data->bits.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->free_referer) {
|
|
/* If we already have an allocated referer, free this first */
|
|
free(data->referer);
|
|
}
|
|
|
|
data->referer = strdup(data->url);
|
|
data->free_referer = TRUE; /* yes, free this later */
|
|
data->bits.http_set_referer = TRUE; /* might have been false */
|
|
}
|
|
|
|
if(2 != sscanf(data->newurl, "%15[^:]://%" URL_MAX_LENGTH_TXT
|
|
"s", prot, path)) {
|
|
/***
|
|
*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;
|
|
|
|
/* protsep points to the start of the host name */
|
|
protsep=strstr(data->url, "//");
|
|
if(!protsep)
|
|
protsep=data->url;
|
|
else {
|
|
/* TBD: set the port with curl_setopt() */
|
|
data->port=0; /* we got a full URL and then we should reset the
|
|
port number here to re-initiate it later */
|
|
protsep+=2; /* pass the slashes */
|
|
}
|
|
|
|
if('/' != data->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(data->url) +
|
|
1 + /* possible slash */
|
|
strlen(data->newurl) + 1/* zero byte */);
|
|
|
|
if(!newest)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
sprintf(newest, "%s%s%s", data->url, ('/' == data->newurl[0])?"":"/",
|
|
data->newurl);
|
|
free(data->newurl);
|
|
data->newurl = newest;
|
|
}
|
|
else {
|
|
/* This was an absolute URL, clear the port number! */
|
|
/* TBD: set the port with curl_setopt() */
|
|
data->port = 0;
|
|
}
|
|
|
|
/* TBD: set the URL with curl_setopt() */
|
|
data->url = data->newurl;
|
|
data->newurl = NULL; /* don't show! */
|
|
|
|
/* Disable both types of POSTs, since doing a second POST when
|
|
following isn't what anyone would want! */
|
|
data->bits.http_post = FALSE;
|
|
data->bits.http_formpost = FALSE;
|
|
|
|
infof(data, "Follows Location: to new URL: '%s'\n", data->url);
|
|
|
|
curl_disconnect(c_connect);
|
|
continue;
|
|
}
|
|
|
|
curl_disconnect(c_connect);
|
|
}
|
|
break; /* it only reaches here when this shouldn't loop */
|
|
|
|
} while(1); /* loop if Location: */
|
|
|
|
if(data->newurl)
|
|
free(data->newurl);
|
|
|
|
#if 0
|
|
if((CURLE_OK == res) && data->writeinfo) {
|
|
/* Time to output some info to stdout */
|
|
WriteOut(data);
|
|
}
|
|
#endif
|
|
return res;
|
|
}
|
|
|