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CURLOPT_VERBOSE(3) Library Functions Manual CURLOPT_VERBOSE(3) NAME CURLOPT_VERBOSE - verbose mode SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_VERBOSE, long onoff); DESCRIPTION Set the onoff parameter to 1 to make the library display a lot of verbose information about its operations on this handle. Useful for libcurl and/or protocol debugging and understanding. The verbose information is sent to stderr, or the stream set with CURLOPT_STDERR(3). You hardly ever want this enabled in production use, you almost always want this used when you debug/report problems. To also get all the protocol data sent and received, consider using the CURLOPT_DEBUGFUNCTION(3). WARNING: this may show sensitive contents from headers and data. DEFAULT 0, meaning disabled. PROTOCOLS This functionality affects all supported protocols EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode result; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); /* ask libcurl to show us the verbose output */ curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); /* Perform the request */ result = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.1 RETURN VALUE curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLOPT_DEBUGFUNCTION(3), CURLOPT_ERRORBUFFER(3), CURLOPT_STDERR(3), curl_global_trace(3) libcurl 2026-06-11 CURLOPT_VERBOSE(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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