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e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
68 lines
1.4 KiB
Markdown
68 lines
1.4 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.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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Protocol:
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- All
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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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# 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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