On Wednesday, December 15, 2010 07:16:11 pm Brad Hards wrote: > I've developed a (very) simple example of using libcurl to send SMTP - see > attached patch. Note to self: first read contribution guidelines in full, the post.
Corrected patch with 80 column limit respected, and in git format. Sorry about that. Brad
From 297c32b29d563d0ad407f6d53af1e103998c970b Mon Sep 17 00:00:00 2001 From: Brad Hards <[email protected]> Date: Wed, 15 Dec 2010 19:27:28 +1100 Subject: [PATCH] Docs: add simple SMTP example Add a simple SMTP example program, patterned after some of the existing examples, and the curl application. --- docs/examples/simplesmtp.c | 71 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 71 insertions(+), 0 deletions(-) create mode 100644 docs/examples/simplesmtp.c diff --git a/docs/examples/simplesmtp.c b/docs/examples/simplesmtp.c new file mode 100644 index 0000000..ce71c88 --- /dev/null +++ b/docs/examples/simplesmtp.c @@ -0,0 +1,71 @@ +/***************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + */ + +#include <stdio.h> +#include <string.h> +#include <curl/curl.h> + +int main(void) +{ + CURL *curl; + CURLcode res; + struct curl_slist *recipients = NULL; + + /* this becomes the Return-Path header value */ + static const char *from = "[email protected]"; + + /* this becomes the Envelope-to header value */ + static const char *to = "[email protected]"; + + curl = curl_easy_init(); + if(curl) { + /* this is the URL for your mailserver - you can also use an smtps:// URL + * here */ + curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.net."); + + /* Note that this option isn't strictly required, omitting it will result in + * libcurl will sent the MAIL FROM command with no sender data. That may + * result in the receiving SMTP system rewriting the header, which will look + * a bit strange. */ + curl_easy_setopt(curl, CURLOPT_MAIL_FROM, from); + + /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array */ + recipients = curl_slist_append(recipients, to); + /* You really do have to set this option though - libcurl won't work without + /* it */ + curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients); + + /* You provide the remaining headers (including To:, Cc:, Bcc: and From:) + * and the body of the message as the "data" element. There are two choices, + * either: + * - provide a callback function and specify the function name using the + * CURLOPT_READFUNCTION option; or + * - just provide a FILE pointer that can be used to read the data from. + * The easiest case is just to read from standard input, (which is available + * as a FILE pointer) as shown here. + */ + curl_easy_setopt(curl, CURLOPT_READDATA, stdin); + + /* send the message (including headers) */ + res = curl_easy_perform(curl); + + /* free the list of recipients */ + curl_slist_free_all(recipients); + + /* curl won't send the QUIT command until you call cleanup, so you should be + * able to re-use this connection for additional messages (setting + * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling + * curl_easy_perform() again. It may not be a good idea to keep the + * connection open for a very long time though, and you do want to clean up + * in the end. + */ + curl_easy_cleanup(curl); + } + return 0; +} -- 1.7.3.3
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