CURLINFO_CONTENT_LENGTH_DOWNLOAD - Man Page
get content-length of download
Synopsis
#include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD, double *content_length);
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.
CURLINFO_CONTENT_LENGTH_DOWNLOAD_T(3) is a newer replacement that returns a more sensible variable type.
Protocols
This functionality affects all supported protocols
Example
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); } } } }
Deprecated
Deprecated since 7.55.0.
Availability
Added in curl 7.6.1
Return Value
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
See Also
CURLINFO_CONTENT_LENGTH_UPLOAD(3), curl_easy_getinfo(3), curl_easy_setopt(3)
Referenced By
2024-09-24 libcurl