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        !            23: .TH CURLINFO_CONTENT_LENGTH_DOWNLOAD_T 3 "March 23, 2020" "libcurl 7.70.0" "curl_easy_getinfo options"
        !            24: 
        !            25: .SH NAME
        !            26: CURLINFO_CONTENT_LENGTH_DOWNLOAD_T \- get content-length of download
        !            27: .SH SYNOPSIS
        !            28: #include <curl/curl.h>
        !            29: 
        !            30: CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T,
        !            31:                            curl_off_t *content_length);
        !            32: .SH DESCRIPTION
        !            33: Pass a pointer to a \fIcurl_off_t\fP to receive the content-length of the
        !            34: download. This is the value read from the Content-Length: field. Stores -1 if
        !            35: the size isn't known.
        !            36: .SH PROTOCOLS
        !            37: HTTP(S)
        !            38: .SH EXAMPLE
        !            39: .nf
        !            40: CURL *curl = curl_easy_init();
        !            41: if(curl) {
        !            42:   curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
        !            43: 
        !            44:   /* Perform the request */
        !            45:   res = curl_easy_perform(curl);
        !            46: 
        !            47:   if(!res) {
        !            48:     /* check the size */
        !            49:     curl_off_t cl;
        !            50:     res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &cl);
        !            51:     if(!res) {
        !            52:       printf("Download size: %" CURL_FORMAT_CURL_OFF_T "\\n", cl);
        !            53:     }
        !            54:   }
        !            55: }
        !            56: .fi
        !            57: .SH AVAILABILITY
        !            58: Added in 7.55.0
        !            59: .SH RETURN VALUE
        !            60: Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
        !            61: .SH "SEE ALSO"
        !            62: .BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "
        !            63: .BR CURLINFO_CONTENT_LENGTH_UPLOAD_T "(3), "