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eefcc1bda4
curldown is this new file format for libcurl man pages. It is markdown inspired with differences: - Each file has a set of leading headers with meta-data - Supports a small subset of markdown - Uses .md file extensions for editors/IDE/GitHub to treat them nicely - Generates man pages very similar to the previous ones - Generates man pages that still convert nicely to HTML on the website - Detects and highlights mentions of curl symbols automatically (when their man page section is specified) tools: - cd2nroff: converts from curldown to nroff man page - nroff2cd: convert an (old) nroff man page to curldown - cdall: convert many nroff pages to curldown versions - cd2cd: verifies and updates a curldown to latest curldown This setup generates .3 versions of all the curldown versions at build time. CI: Since the documentation is now technically markdown in the eyes of many things, the CI runs many more tests and checks on this documentation, including proselint, link checkers and tests that make sure we capitalize the first letter after a period... Closes #12730
70 lines
1.4 KiB
Markdown
70 lines
1.4 KiB
Markdown
---
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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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