/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at https://curl.haxx.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ***************************************************************************/ #include "curl_setup.h" #include <curl/curl.h> #include "curl_range.h" #include "sendf.h" #include "strtoofft.h" /* Only include this function if one or more of FTP, FILE are enabled. */ #if !defined(CURL_DISABLE_FTP) || !defined(CURL_DISABLE_FILE) /* Check if this is a range download, and if so, set the internal variables properly. */ CURLcode Curl_range(struct connectdata *conn) { curl_off_t from, to; char *ptr; char *ptr2; struct Curl_easy *data = conn->data; if(data->state.use_range && data->state.range) { CURLofft from_t; CURLofft to_t; from_t = curlx_strtoofft(data->state.range, &ptr, 0, &from); if(from_t == CURL_OFFT_FLOW) return CURLE_RANGE_ERROR; while(*ptr && (ISSPACE(*ptr) || (*ptr == '-'))) ptr++; to_t = curlx_strtoofft(ptr, &ptr2, 0, &to); if(to_t == CURL_OFFT_FLOW) return CURLE_RANGE_ERROR; if((to_t == CURL_OFFT_INVAL) && !from_t) { /* X - */ data->state.resume_from = from; DEBUGF(infof(data, "RANGE %" CURL_FORMAT_CURL_OFF_T " to end of file\n", from)); } else if((from_t == CURL_OFFT_INVAL) && !to_t) { /* -Y */ data->req.maxdownload = to; data->state.resume_from = -to; DEBUGF(infof(data, "RANGE the last %" CURL_FORMAT_CURL_OFF_T " bytes\n", to)); } else { /* X-Y */ curl_off_t totalsize; /* Ensure the range is sensible - to should follow from. */ if(from > to) return CURLE_RANGE_ERROR; totalsize = to - from; if(totalsize == CURL_OFF_T_MAX) return CURLE_RANGE_ERROR; data->req.maxdownload = totalsize + 1; /* include last byte */ data->state.resume_from = from; DEBUGF(infof(data, "RANGE from %" CURL_FORMAT_CURL_OFF_T " getting %" CURL_FORMAT_CURL_OFF_T " bytes\n", from, data->req.maxdownload)); } DEBUGF(infof(data, "range-download from %" CURL_FORMAT_CURL_OFF_T " to %" CURL_FORMAT_CURL_OFF_T ", totally %" CURL_FORMAT_CURL_OFF_T " bytes\n", from, to, data->req.maxdownload)); } else data->req.maxdownload = -1; return CURLE_OK; } #endif