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.\" ************************************************************************** .\" * _ _ ____ _ .\" * Project ___| | | | _ \| | .\" * / __| | | | |_) | | .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * .\" * Copyright (C) Daniel Stenberg, <[email protected]>, 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.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. .\" * .\" * SPDX-License-Identifier: curl .\" * .\" ************************************************************************** .\" .TH CURLINFO_CONTENT_LENGTH_DOWNLOAD 3 "January 02, 2023" "libcurl 7.88.1" "curl_easy_getinfo options" .SH NAME CURLINFO_CONTENT_LENGTH_DOWNLOAD \- get content-length of download .SH SYNOPSIS .nf #include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD, double *content_length); .fi .SH DESCRIPTION Pass a pointer to a double to receive the content-length of the download. This is the value read from the Content-Length: field. Since 7.19.4, this returns -1 if the size is not known. \fICURLINFO_CONTENT_LENGTH_DOWNLOAD_T(3)\fP is a newer replacement that returns a more sensible variable type. .SH PROTOCOLS HTTP(S) .SH EXAMPLE .nf CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); /* Perform the request */ res = curl_easy_perform(curl); if(!res) { /* check the size */ double cl; res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl); if(!res) { printf("Size: %.0f\\n", cl); } } } .fi .SH AVAILABILITY Added in 7.6.1. Deprecated since 7.55.0. .SH RETURN VALUE Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. .SH "SEE ALSO" .BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), " .BR CURLINFO_CONTENT_LENGTH_UPLOAD "(3), "