CURLOPT_USERAGENT - Man Page
HTTP user-agent header
Synopsis
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USERAGENT, char *ua);
Description
Pass a pointer to a null-terminated string as parameter. It will be used to set the User-Agent: header in the HTTP request sent to the remote server. This can be used to fool servers or scripts. You can also set any custom header with CURLOPT_HTTPHEADER(3).
The application does not have to keep the string around after setting this option.
Default
NULL, no User-Agent: header is used by default.
Protocols
HTTP, HTTPS
Example
CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); curl_easy_setopt(curl, CURLOPT_USERAGENT, "Dark Secret Ninja/1.0"); curl_easy_perform(curl); }
Availability
As long as HTTP is supported
Return Value
Returns CURLE_OK if HTTP is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.
See Also
Referenced By
curl_easy_setopt(3), CURLOPT_HTTPHEADER(3), CURLOPT_REFERER(3), libcurl-security(3), nbdkit-curl-plugin(1).
January 02, 2023 libcurl 7.88.1 curl_easy_setopt options