Sending feedback data via HTTPS POST from wxWidgets application
I've decided to go with libCURL linked to openssl. Both of the packages are able availabe on most Linux system and can be fairly easily built on Windows and OS X.
Here is example C code that sends feedback:
#include <stdio.h>#include <string.h>#include <curl/curl.h>#include <curl/types.h>#include <curl/easy.h>int main(int argc, char *argv[]){ CURL *curl; CURLcode res; struct curl_httppost *formpost=NULL; struct curl_httppost *lastptr=NULL; struct curl_slist *headerlist=NULL; static const char buf[] = "Expect:"; curl_global_init(CURL_GLOBAL_ALL); /* Fill in the name field */ curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, "name", CURLFORM_COPYCONTENTS, "John Doe", CURLFORM_END); /* Fill in the comments field */ curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, "comments", CURLFORM_COPYCONTENTS, "using HTTPS POST\nline 2\nline 3", CURLFORM_END); curl = curl_easy_init(); /* initalize custom header list (stating that Expect: 100-continue is not wanted */ headerlist = curl_slist_append(headerlist, buf); if(curl) { /* what URL that receives this POST */ curl_easy_setopt(curl, CURLOPT_URL, "https://some_host.com/path/feedback.php"); // Uncomment to disable certificate checks //curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0); //curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0); curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist); curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost); res = curl_easy_perform(curl); printf("Curl result: %d\n", res); /* always cleanup */ curl_easy_cleanup(curl); /* then cleanup the formpost chain */ curl_formfree(formpost); /* free slist */ curl_slist_free_all (headerlist); } return 0;}That can be compiled on Linux like so:
gcc post.c -lcurl -o postHere is example PHP code that accepts that post:
<?php $recipient = "john@some_host.com"; if (empty($_POST)) { // We only accpet POSTs header('HTTP/1.0 403 Forbidden'); exit; } else { // Handle a POST $message .= "Submitted at ".date("F j, Y, g:i a")."\n\n"; $message .= "Name:\n"; $message .= $_POST['name']."\n\n"; $message .= "-------------------------------------------\n\n"; $message .= "Comments:\n\n"; $message .= $_POST['comments']."\n\n"; // Send message to email address $sent = mail($recipient, "Feedback", $message, "From: Feedback <noreply@some_host.com>\r\n"); if ($sent) {?> <html> <body> Got POST and sent email: <pre><? echo $message; ?></pre> </body> </html><?php } else { // Return an error header('HTTP/1.0 500 Internal Server Error', true, 500); exit; } }?>
Boost::Asio is an alternative I've used before, even in a wxWidgets app. I've used it to download files before (and only have sample code for that), but sadly don't have (and can't quickly find) sample code for HTTP(S) POSTs.
Boost::asio has a "problem" in that it's Boost (which is either a big problem because "ugh, Boost", or not a problem "Awesome, Boost!"