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- .\" generated by cd2nroff 0.1 from CURLINFO_CONTENT_LENGTH_DOWNLOAD.md
- .TH CURLINFO_CONTENT_LENGTH_DOWNLOAD 3 "2025-01-17" libcurl
- .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
- This functionality affects all supported protocols
- .SH EXAMPLE
- .nf
- int main(void)
- {
- CURL *curl = curl_easy_init();
- if(curl) {
- CURLcode res;
- 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 DEPRECATED
- Deprecated since 7.55.0.
- .SH AVAILABILITY
- Added in curl 7.6.1
- .SH RETURN VALUE
- Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
- .SH SEE ALSO
- .BR CURLINFO_CONTENT_LENGTH_UPLOAD (3),
- .BR curl_easy_getinfo (3),
- .BR curl_easy_setopt (3)
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