Return to curl_range.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / lib

curl

    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
    9:  *
   10:  * This software is licensed as described in the file COPYING, which
   11:  * you should have received as part of this distribution. The terms
   12:  * are also available at https://curl.haxx.se/docs/copyright.html.
   13:  *
   14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
   15:  * copies of the Software, and permit persons to whom the Software is
   16:  * furnished to do so, under the terms of the COPYING file.
   17:  *
   18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
   19:  * KIND, either express or implied.
   20:  *
   21:  ***************************************************************************/
   22: 
   23: #include "curl_setup.h"
   24: #include <curl/curl.h>
   25: #include "curl_range.h"
   26: #include "sendf.h"
   27: #include "strtoofft.h"
   28: 
   29: /* Only include this function if one or more of FTP, FILE are enabled. */
   30: #if !defined(CURL_DISABLE_FTP) || !defined(CURL_DISABLE_FILE)
   31: 
   32:  /*
   33:   Check if this is a range download, and if so, set the internal variables
   34:   properly.
   35:  */
   36: CURLcode Curl_range(struct connectdata *conn)
   37: {
   38:   curl_off_t from, to;
   39:   char *ptr;
   40:   char *ptr2;
   41:   struct Curl_easy *data = conn->data;
   42: 
   43:   if(data->state.use_range && data->state.range) {
   44:     CURLofft from_t;
   45:     CURLofft to_t;
   46:     from_t = curlx_strtoofft(data->state.range, &ptr, 0, &from);
   47:     if(from_t == CURL_OFFT_FLOW)
   48:       return CURLE_RANGE_ERROR;
   49:     while(*ptr && (ISSPACE(*ptr) || (*ptr == '-')))
   50:       ptr++;
   51:     to_t = curlx_strtoofft(ptr, &ptr2, 0, &to);
   52:     if(to_t == CURL_OFFT_FLOW)
   53:       return CURLE_RANGE_ERROR;
   54:     if((to_t == CURL_OFFT_INVAL) && !from_t) {
   55:       /* X - */
   56:       data->state.resume_from = from;
   57:       DEBUGF(infof(data, "RANGE %" CURL_FORMAT_CURL_OFF_T " to end of file\n",
   58:                    from));
   59:     }
   60:     else if((from_t == CURL_OFFT_INVAL) && !to_t) {
   61:       /* -Y */
   62:       data->req.maxdownload = to;
   63:       data->state.resume_from = -to;
   64:       DEBUGF(infof(data, "RANGE the last %" CURL_FORMAT_CURL_OFF_T " bytes\n",
   65:                    to));
   66:     }
   67:     else {
   68:       /* X-Y */
   69:       curl_off_t totalsize;
   70: 
   71:       /* Ensure the range is sensible - to should follow from. */
   72:       if(from > to)
   73:         return CURLE_RANGE_ERROR;
   74: 
   75:       totalsize = to - from;
   76:       if(totalsize == CURL_OFF_T_MAX)
   77:         return CURLE_RANGE_ERROR;
   78: 
   79:       data->req.maxdownload = totalsize + 1; /* include last byte */
   80:       data->state.resume_from = from;
   81:       DEBUGF(infof(data, "RANGE from %" CURL_FORMAT_CURL_OFF_T
   82:                    " getting %" CURL_FORMAT_CURL_OFF_T " bytes\n",
   83:                    from, data->req.maxdownload));
   84:     }
   85:     DEBUGF(infof(data, "range-download from %" CURL_FORMAT_CURL_OFF_T
   86:                  " to %" CURL_FORMAT_CURL_OFF_T ", totally %"
   87:                  CURL_FORMAT_CURL_OFF_T " bytes\n",
   88:                  from, to, data->req.maxdownload));
   89:   }
   90:   else
   91:     data->req.maxdownload = -1;
   92:   return CURLE_OK;
   93: }
   94: 
   95: #endif