71 lines
1.4 KiB
Markdown
71 lines
1.4 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLINFO_CONTENT_LENGTH_DOWNLOAD
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_CONTENT_LENGTH_UPLOAD (3)
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- curl_easy_getinfo (3)
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- curl_easy_setopt (3)
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---
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# NAME
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CURLINFO_CONTENT_LENGTH_DOWNLOAD - get content-length of download
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD,
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double *content_length);
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~~~
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# DESCRIPTION
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Pass a pointer to a double to receive the content-length of the download. This
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is the value read from the Content-Length: field. Since 7.19.4, this returns
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-1 if the size is not known.
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CURLINFO_CONTENT_LENGTH_DOWNLOAD_T(3) is a newer replacement that returns a more
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sensible variable type.
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# PROTOCOLS
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HTTP(S)
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* Perform the request */
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res = curl_easy_perform(curl);
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if(!res) {
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/* check the size */
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double cl;
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res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl);
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if(!res) {
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printf("Size: %.0f\n", cl);
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}
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}
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.6.1. Deprecated since 7.55.0.
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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