.\" generated by cd2nroff 0.1 from CURLINFO_CONTENT_LENGTH_DOWNLOAD.md .TH CURLINFO_CONTENT_LENGTH_DOWNLOAD 3 "2024-11-07" libcurl .SH NAME CURLINFO_CONTENT_LENGTH_DOWNLOAD \- get content\-length of download .SH SYNOPSIS .nf #include 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)