curl_easy_perform - perform a blocking file transfer
#include <curl/curl.h> CURLcode curl_easy_perform(CURL *easy_handle);
curl_easy_perform(3) libcurl Manual curl_easy_perform(3) NAME curl_easy_perform - perform a blocking file transfer SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_perform(CURL *easy_handle); DESCRIPTION Invoke this function after curl_easy_init(3) and all the curl_easy_setopt(3) calls are made, and it performs the transfer as described in the options. It must be called with the same easy_handle as input as the curl_easy_init(3) call returned. curl_easy_perform(3) performs the entire request in a blocking manner and returns when done, or earlier if it fails. For non-blocking behav- ior, see curl_multi_perform(3). You can do any amount of calls to curl_easy_perform(3) while using the same easy_handle. If you intend to transfer more than one file, you are even encouraged to do so. libcurl will then attempt to re-use the same connection for the following transfers, thus making the operations faster, less CPU intense and using less network resources. Just note that you will have to use curl_easy_setopt(3) between the invokes to set options for the following curl_easy_perform. You must never call this function simultaneously from two places using the same easy_handle. Let the function return first before invoking it another time. If you want parallel transfers, you must use several curl easy_handles. A network transfer moves data to a peer or from a peer. An application tells libcurl how to receive data by setting the CURLOPT_WRITEFUNC- TION(3) and CURLOPT_WRITEDATA(3) options. To tell libcurl what data to send, there are a few more alternatives but two common ones are CUR- LOPT_READFUNCTION(3) and CURLOPT_POSTFIELDS(3). While the easy_handle is added to a multi handle, it cannot be used by curl_easy_perform(3). EXAMPLE CURL *curl = curl_easy_init(); if(curl) { CURLcode res; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); res = curl_easy_perform(curl); curl_easy_cleanup(curl); } AVAILABILITY Always RETURN VALUE CURLE_OK (0) means everything was ok, non-zero means an error occurred as <curl/curl.h> defines - see libcurl-errors(3). If the CURLOPT_ERROR- BUFFER(3) was set with curl_easy_setopt(3) there will be a readable error message in the error buffer when non-zero is returned. ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+------------------+ |Availability | web/curl | +---------------+------------------+ |Stability | Uncommitted | +---------------+------------------+ SEE ALSO curl_easy_init(3), curl_easy_setopt(3), curl_multi_add_handle(3), curl_multi_perform(3), libcurl-errors(3), NOTES Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from https://curl.se/down- load/curl-7.83.1.tar.bz2. Further information about this software can be found on the open source community website at http://curl.haxx.se/. libcurl 7.83.1 November 26, 2021 curl_easy_perform(3)