597 lines
17 KiB
C
Executable File
597 lines
17 KiB
C
Executable File
/***************************************************************************
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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 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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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 COPYING file.
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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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***************************************************************************/
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#include "curl_setup.h"
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#ifndef CURL_DISABLE_FILE
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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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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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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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_FCNTL_H
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#include <fcntl.h>
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#endif
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#include "strtoofft.h"
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#include "urldata.h"
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#include <curl/curl.h>
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#include "progress.h"
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#include "sendf.h"
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#include "escape.h"
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#include "file.h"
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#include "speedcheck.h"
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#include "getinfo.h"
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#include "transfer.h"
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#include "url.h"
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#include "parsedate.h" /* for the week day and month names */
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#include "warnless.h"
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#include "curl_printf.h"
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/* The last #include files should be: */
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#include "curl_memory.h"
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#include "memdebug.h"
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#if defined(WIN32) || defined(MSDOS) || defined(__EMX__) || \
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defined(__SYMBIAN32__)
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#define DOS_FILESYSTEM 1
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#endif
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#ifdef OPEN_NEEDS_ARG3
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# define open_readonly(p,f) open((p),(f),(0))
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#else
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# define open_readonly(p,f) open((p),(f))
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#endif
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/*
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* Forward declarations.
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*/
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static CURLcode file_do(struct connectdata *, bool *done);
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static CURLcode file_done(struct connectdata *conn,
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CURLcode status, bool premature);
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static CURLcode file_connect(struct connectdata *conn, bool *done);
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static CURLcode file_disconnect(struct connectdata *conn,
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bool dead_connection);
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static CURLcode file_setup_connection(struct connectdata *conn);
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/*
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* FILE scheme handler.
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*/
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const struct Curl_handler Curl_handler_file = {
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"FILE", /* scheme */
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file_setup_connection, /* setup_connection */
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file_do, /* do_it */
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file_done, /* done */
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ZERO_NULL, /* do_more */
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file_connect, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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ZERO_NULL, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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file_disconnect, /* disconnect */
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ZERO_NULL, /* readwrite */
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0, /* defport */
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CURLPROTO_FILE, /* protocol */
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PROTOPT_NONETWORK | PROTOPT_NOURLQUERY /* flags */
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};
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static CURLcode file_setup_connection(struct connectdata *conn)
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{
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/* allocate the FILE specific struct */
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conn->data->req.protop = calloc(1, sizeof(struct FILEPROTO));
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if(!conn->data->req.protop)
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return CURLE_OUT_OF_MEMORY;
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return CURLE_OK;
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}
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/*
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Check if this is a range download, and if so, set the internal variables
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properly. This code is copied from the FTP implementation and might as
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well be factored out.
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*/
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static CURLcode file_range(struct connectdata *conn)
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{
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curl_off_t from, to;
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curl_off_t totalsize=-1;
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char *ptr;
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char *ptr2;
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struct SessionHandle *data = conn->data;
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if(data->state.use_range && data->state.range) {
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from=curlx_strtoofft(data->state.range, &ptr, 0);
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while(*ptr && (ISSPACE(*ptr) || (*ptr=='-')))
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ptr++;
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to=curlx_strtoofft(ptr, &ptr2, 0);
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if(ptr == ptr2) {
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/* we didn't get any digit */
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to=-1;
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}
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if((-1 == to) && (from>=0)) {
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/* X - */
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data->state.resume_from = from;
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DEBUGF(infof(data, "RANGE %" CURL_FORMAT_CURL_OFF_T " to end of file\n",
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from));
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}
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else if(from < 0) {
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/* -Y */
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data->req.maxdownload = -from;
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data->state.resume_from = from;
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DEBUGF(infof(data, "RANGE the last %" CURL_FORMAT_CURL_OFF_T " bytes\n",
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-from));
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}
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else {
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/* X-Y */
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totalsize = to-from;
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data->req.maxdownload = totalsize+1; /* include last byte */
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data->state.resume_from = from;
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DEBUGF(infof(data, "RANGE from %" CURL_FORMAT_CURL_OFF_T
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" getting %" CURL_FORMAT_CURL_OFF_T " bytes\n",
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from, data->req.maxdownload));
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}
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DEBUGF(infof(data, "range-download from %" CURL_FORMAT_CURL_OFF_T
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" to %" CURL_FORMAT_CURL_OFF_T ", totally %"
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CURL_FORMAT_CURL_OFF_T " bytes\n",
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from, to, data->req.maxdownload));
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}
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else
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data->req.maxdownload = -1;
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return CURLE_OK;
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}
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/*
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* file_connect() gets called from Curl_protocol_connect() to allow us to
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* do protocol-specific actions at connect-time. We emulate a
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* connect-then-transfer protocol and "connect" to the file here
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*/
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static CURLcode file_connect(struct connectdata *conn, bool *done)
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{
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struct SessionHandle *data = conn->data;
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char *real_path;
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struct FILEPROTO *file = data->req.protop;
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int fd;
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#ifdef DOS_FILESYSTEM
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int i;
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char *actual_path;
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#endif
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int real_path_len;
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real_path = curl_easy_unescape(data, data->state.path, 0, &real_path_len);
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if(!real_path)
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return CURLE_OUT_OF_MEMORY;
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#ifdef DOS_FILESYSTEM
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/* If the first character is a slash, and there's
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something that looks like a drive at the beginning of
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the path, skip the slash. If we remove the initial
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slash in all cases, paths without drive letters end up
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relative to the current directory which isn't how
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browsers work.
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Some browsers accept | instead of : as the drive letter
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separator, so we do too.
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On other platforms, we need the slash to indicate an
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absolute pathname. On Windows, absolute paths start
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with a drive letter.
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*/
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actual_path = real_path;
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if((actual_path[0] == '/') &&
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actual_path[1] &&
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(actual_path[2] == ':' || actual_path[2] == '|')) {
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actual_path[2] = ':';
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actual_path++;
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real_path_len--;
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}
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/* change path separators from '/' to '\\' for DOS, Windows and OS/2 */
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for(i=0; i < real_path_len; ++i)
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if(actual_path[i] == '/')
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actual_path[i] = '\\';
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else if(!actual_path[i]) /* binary zero */
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return CURLE_URL_MALFORMAT;
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fd = open_readonly(actual_path, O_RDONLY|O_BINARY);
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file->path = actual_path;
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#else
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if(memchr(real_path, 0, real_path_len))
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/* binary zeroes indicate foul play */
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return CURLE_URL_MALFORMAT;
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fd = open_readonly(real_path, O_RDONLY);
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file->path = real_path;
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#endif
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file->freepath = real_path; /* free this when done */
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file->fd = fd;
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if(!data->set.upload && (fd == -1)) {
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failf(data, "Couldn't open file %s", data->state.path);
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file_done(conn, CURLE_FILE_COULDNT_READ_FILE, FALSE);
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return CURLE_FILE_COULDNT_READ_FILE;
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}
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*done = TRUE;
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return CURLE_OK;
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}
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static CURLcode file_done(struct connectdata *conn,
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CURLcode status, bool premature)
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{
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struct FILEPROTO *file = conn->data->req.protop;
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(void)status; /* not used */
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(void)premature; /* not used */
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if(file) {
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Curl_safefree(file->freepath);
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file->path = NULL;
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if(file->fd != -1)
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close(file->fd);
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file->fd = -1;
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}
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return CURLE_OK;
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}
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static CURLcode file_disconnect(struct connectdata *conn,
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bool dead_connection)
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{
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struct FILEPROTO *file = conn->data->req.protop;
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(void)dead_connection; /* not used */
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if(file) {
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Curl_safefree(file->freepath);
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file->path = NULL;
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if(file->fd != -1)
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close(file->fd);
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file->fd = -1;
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}
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return CURLE_OK;
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}
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#ifdef DOS_FILESYSTEM
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#define DIRSEP '\\'
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#else
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#define DIRSEP '/'
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#endif
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static CURLcode file_upload(struct connectdata *conn)
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{
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struct FILEPROTO *file = conn->data->req.protop;
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const char *dir = strchr(file->path, DIRSEP);
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int fd;
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int mode;
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CURLcode result = CURLE_OK;
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struct SessionHandle *data = conn->data;
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char *buf = data->state.buffer;
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size_t nread;
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size_t nwrite;
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curl_off_t bytecount = 0;
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struct timeval now = Curl_tvnow();
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struct_stat file_stat;
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const char* buf2;
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/*
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* Since FILE: doesn't do the full init, we need to provide some extra
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* assignments here.
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*/
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conn->data->req.upload_fromhere = buf;
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if(!dir)
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return CURLE_FILE_COULDNT_READ_FILE; /* fix: better error code */
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if(!dir[1])
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return CURLE_FILE_COULDNT_READ_FILE; /* fix: better error code */
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#ifdef O_BINARY
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#define MODE_DEFAULT O_WRONLY|O_CREAT|O_BINARY
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#else
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#define MODE_DEFAULT O_WRONLY|O_CREAT
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#endif
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if(data->state.resume_from)
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mode = MODE_DEFAULT|O_APPEND;
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else
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mode = MODE_DEFAULT|O_TRUNC;
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fd = open(file->path, mode, conn->data->set.new_file_perms);
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if(fd < 0) {
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failf(data, "Can't open %s for writing", file->path);
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return CURLE_WRITE_ERROR;
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}
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if(-1 != data->state.infilesize)
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/* known size of data to "upload" */
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Curl_pgrsSetUploadSize(data, data->state.infilesize);
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/* treat the negative resume offset value as the case of "-" */
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if(data->state.resume_from < 0) {
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if(fstat(fd, &file_stat)) {
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close(fd);
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failf(data, "Can't get the size of %s", file->path);
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return CURLE_WRITE_ERROR;
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}
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else
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data->state.resume_from = (curl_off_t)file_stat.st_size;
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}
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while(!result) {
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int readcount;
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result = Curl_fillreadbuffer(conn, BUFSIZE, &readcount);
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if(result)
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break;
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if(readcount <= 0) /* fix questionable compare error. curlvms */
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break;
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nread = (size_t)readcount;
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/*skip bytes before resume point*/
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if(data->state.resume_from) {
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if((curl_off_t)nread <= data->state.resume_from ) {
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data->state.resume_from -= nread;
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nread = 0;
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buf2 = buf;
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}
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else {
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buf2 = buf + data->state.resume_from;
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nread -= (size_t)data->state.resume_from;
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data->state.resume_from = 0;
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}
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}
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else
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buf2 = buf;
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/* write the data to the target */
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nwrite = write(fd, buf2, nread);
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if(nwrite != nread) {
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result = CURLE_SEND_ERROR;
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break;
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}
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bytecount += nread;
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Curl_pgrsSetUploadCounter(data, bytecount);
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if(Curl_pgrsUpdate(conn))
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result = CURLE_ABORTED_BY_CALLBACK;
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else
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result = Curl_speedcheck(data, now);
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}
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if(!result && Curl_pgrsUpdate(conn))
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result = CURLE_ABORTED_BY_CALLBACK;
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close(fd);
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return result;
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}
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/*
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* file_do() is the protocol-specific function for the do-phase, separated
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* from the connect-phase above. Other protocols merely setup the transfer in
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* the do-phase, to have it done in the main transfer loop but since some
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* platforms we support don't allow select()ing etc on file handles (as
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* opposed to sockets) we instead perform the whole do-operation in this
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* function.
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*/
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static CURLcode file_do(struct connectdata *conn, bool *done)
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{
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/* This implementation ignores the host name in conformance with
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RFC 1738. Only local files (reachable via the standard file system)
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are supported. This means that files on remotely mounted directories
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(via NFS, Samba, NT sharing) can be accessed through a file:// URL
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*/
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CURLcode result = CURLE_OK;
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struct_stat statbuf; /* struct_stat instead of struct stat just to allow the
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Windows version to have a different struct without
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having to redefine the simple word 'stat' */
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curl_off_t expected_size=0;
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bool size_known;
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bool fstated=FALSE;
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ssize_t nread;
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struct SessionHandle *data = conn->data;
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char *buf = data->state.buffer;
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curl_off_t bytecount = 0;
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int fd;
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struct timeval now = Curl_tvnow();
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struct FILEPROTO *file;
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*done = TRUE; /* unconditionally */
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Curl_initinfo(data);
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Curl_pgrsStartNow(data);
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if(data->set.upload)
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return file_upload(conn);
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file = conn->data->req.protop;
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/* get the fd from the connection phase */
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fd = file->fd;
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/* VMS: This only works reliable for STREAMLF files */
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if(-1 != fstat(fd, &statbuf)) {
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/* we could stat it, then read out the size */
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expected_size = statbuf.st_size;
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/* and store the modification time */
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data->info.filetime = (long)statbuf.st_mtime;
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fstated = TRUE;
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}
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if(fstated && !data->state.range && data->set.timecondition) {
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if(!Curl_meets_timecondition(data, (time_t)data->info.filetime)) {
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*done = TRUE;
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return CURLE_OK;
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}
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}
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/* If we have selected NOBODY and HEADER, it means that we only want file
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information. Which for FILE can't be much more than the file size and
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date. */
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if(data->set.opt_no_body && data->set.include_header && fstated) {
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snprintf(buf, sizeof(data->state.buffer),
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"Content-Length: %" CURL_FORMAT_CURL_OFF_T "\r\n", expected_size);
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result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
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if(result)
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return result;
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result = Curl_client_write(conn, CLIENTWRITE_BOTH,
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(char *)"Accept-ranges: bytes\r\n", 0);
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if(result)
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return result;
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if(fstated) {
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time_t filetime = (time_t)statbuf.st_mtime;
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struct tm buffer;
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const struct tm *tm = &buffer;
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result = Curl_gmtime(filetime, &buffer);
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if(result)
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return result;
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/* format: "Tue, 15 Nov 1994 12:45:26 GMT" */
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snprintf(buf, BUFSIZE-1,
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"Last-Modified: %s, %02d %s %4d %02d:%02d:%02d GMT\r\n",
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Curl_wkday[tm->tm_wday?tm->tm_wday-1:6],
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tm->tm_mday,
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Curl_month[tm->tm_mon],
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tm->tm_year + 1900,
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tm->tm_hour,
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tm->tm_min,
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tm->tm_sec);
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result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
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}
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/* if we fstat()ed the file, set the file size to make it available post-
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transfer */
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if(fstated)
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Curl_pgrsSetDownloadSize(data, expected_size);
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return result;
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}
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/* Check whether file range has been specified */
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file_range(conn);
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/* Adjust the start offset in case we want to get the N last bytes
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* of the stream iff the filesize could be determined */
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if(data->state.resume_from < 0) {
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if(!fstated) {
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failf(data, "Can't get the size of file.");
|
|
return CURLE_READ_ERROR;
|
|
}
|
|
else
|
|
data->state.resume_from += (curl_off_t)statbuf.st_size;
|
|
}
|
|
|
|
if(data->state.resume_from <= expected_size)
|
|
expected_size -= data->state.resume_from;
|
|
else {
|
|
failf(data, "failed to resume file:// transfer");
|
|
return CURLE_BAD_DOWNLOAD_RESUME;
|
|
}
|
|
|
|
/* A high water mark has been specified so we obey... */
|
|
if(data->req.maxdownload > 0)
|
|
expected_size = data->req.maxdownload;
|
|
|
|
if(!fstated || (expected_size == 0))
|
|
size_known = FALSE;
|
|
else
|
|
size_known = TRUE;
|
|
|
|
/* The following is a shortcut implementation of file reading
|
|
this is both more efficient than the former call to download() and
|
|
it avoids problems with select() and recv() on file descriptors
|
|
in Winsock */
|
|
if(fstated)
|
|
Curl_pgrsSetDownloadSize(data, expected_size);
|
|
|
|
if(data->state.resume_from) {
|
|
if(data->state.resume_from !=
|
|
lseek(fd, data->state.resume_from, SEEK_SET))
|
|
return CURLE_BAD_DOWNLOAD_RESUME;
|
|
}
|
|
|
|
Curl_pgrsTime(data, TIMER_STARTTRANSFER);
|
|
|
|
while(!result) {
|
|
/* Don't fill a whole buffer if we want less than all data */
|
|
size_t bytestoread;
|
|
|
|
if(size_known) {
|
|
bytestoread =
|
|
(expected_size < CURL_OFF_T_C(BUFSIZE) - CURL_OFF_T_C(1)) ?
|
|
curlx_sotouz(expected_size) : BUFSIZE - 1;
|
|
}
|
|
else
|
|
bytestoread = BUFSIZE-1;
|
|
|
|
nread = read(fd, buf, bytestoread);
|
|
|
|
if(nread > 0)
|
|
buf[nread] = 0;
|
|
|
|
if(nread <= 0 || (size_known && (expected_size == 0)))
|
|
break;
|
|
|
|
bytecount += nread;
|
|
if(size_known)
|
|
expected_size -= nread;
|
|
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY, buf, nread);
|
|
if(result)
|
|
return result;
|
|
|
|
Curl_pgrsSetDownloadCounter(data, bytecount);
|
|
|
|
if(Curl_pgrsUpdate(conn))
|
|
result = CURLE_ABORTED_BY_CALLBACK;
|
|
else
|
|
result = Curl_speedcheck(data, now);
|
|
}
|
|
if(Curl_pgrsUpdate(conn))
|
|
result = CURLE_ABORTED_BY_CALLBACK;
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif
|