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curl_formget(3) Library Functions Manual curl_formget(3) NAME curl_formget - serialize a multipart form POST chain SYNOPSIS #include <curl/curl.h> int curl_formget(struct curl_httppost * form, void *userp, curl_formget_callback append); DESCRIPTION The form API (including this function) is deprecated since libcurl 7.56.0. curl_formget() serializes data previously built with curl_formadd(3). It accepts a void pointer as second argument named userp which is passed as the first argument to the curl_formget_callback function. typedef size_t (*curl_formget_callback)(void *userp, const char *buf, size_t len); The curl_formget_callback is invoked for each part of the HTTP POST chain. The character buffer passed to the callback must not be freed. The callback should return the buffer length passed to it on success. If the CURLFORM_STREAM option is used in the formpost, it prevents curl_formget(3) from working until you have performed the actual HTTP re- quest. This, because first then does libcurl known which actual read call- back to use. PROTOCOLS This functionality affects http only EXAMPLE size_t print_httppost_callback(void *arg, const char *buf, size_t len) { fwrite(buf, len, 1, stdout); *((size_t *)arg) += len; return len; } size_t print_httppost(struct curl_httppost *post) { size_t total_size = 0; if(curl_formget(post, &total_size, print_httppost_callback)) { return (size_t)-1; } return total_size; } AVAILABILITY Added in curl 7.15.5 RETURN VALUE 0 means everything was OK, non-zero means an error occurred SEE ALSO curl_formadd(3), curl_mime_init(3) libcurl 2026-06-11 curl_formget(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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