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97 lines
3.1 KiB
C
97 lines
3.1 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) 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.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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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#include <curl/curl.h>
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#include "curl_range.h"
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#include "sendf.h"
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#include "strtoofft.h"
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/* Only include this function if one or more of FTP, FILE are enabled. */
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#if !defined(CURL_DISABLE_FTP) || !defined(CURL_DISABLE_FILE)
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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.
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*/
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CURLcode Curl_range(struct Curl_easy *data)
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{
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curl_off_t from, to;
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char *ptr;
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char *ptr2;
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if(data->state.use_range && data->state.range) {
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CURLofft from_t;
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CURLofft to_t;
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from_t = curlx_strtoofft(data->state.range, &ptr, 10, &from);
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if(from_t == CURL_OFFT_FLOW)
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return CURLE_RANGE_ERROR;
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while(*ptr && (ISBLANK(*ptr) || (*ptr == '-')))
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ptr++;
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to_t = curlx_strtoofft(ptr, &ptr2, 10, &to);
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if(to_t == CURL_OFFT_FLOW)
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return CURLE_RANGE_ERROR;
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if((to_t == CURL_OFFT_INVAL) && !from_t) {
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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",
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from));
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}
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else if((from_t == CURL_OFFT_INVAL) && !to_t) {
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/* -Y */
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data->req.maxdownload = to;
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data->state.resume_from = -to;
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DEBUGF(infof(data, "RANGE the last %" CURL_FORMAT_CURL_OFF_T " bytes",
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to));
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}
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else {
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/* X-Y */
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curl_off_t totalsize;
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/* Ensure the range is sensible - to should follow from. */
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if(from > to)
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return CURLE_RANGE_ERROR;
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totalsize = to - from;
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if(totalsize == CURL_OFF_T_MAX)
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return CURLE_RANGE_ERROR;
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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",
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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",
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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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#endif
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