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authorDaniel Stenberg <daniel@haxx.se>2010-11-04 10:32:38 +0100
committerDaniel Stenberg <daniel@haxx.se>2010-11-04 10:32:38 +0100
commit909e711e745fe6b23f18dc9780e28a4e19d1a53a (patch)
treed2257ee2b906362e3c03a75f0819d1b085bd8d35 /docs/examples
parentd95b67f4092c5f35ea615aba085b44ce9ae92243 (diff)
example: add smtp-multi.c
An example application source code sending SMTP mail with the multi interface. It is based on the code Alona Rossen provided, which in turn is based on existing example/test code, and I converted it even more into a decent example with a fair multi API use, put the info required to edit at the top and I added some comments.
Diffstat (limited to 'docs/examples')
-rw-r--r--docs/examples/Makefile.inc3
-rw-r--r--docs/examples/smtp-multi.c196
2 files changed, 198 insertions, 1 deletions
diff --git a/docs/examples/Makefile.inc b/docs/examples/Makefile.inc
index 78d312665..51c96a5a8 100644
--- a/docs/examples/Makefile.inc
+++ b/docs/examples/Makefile.inc
@@ -3,7 +3,8 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \
fopen ftpget ftpgetresp ftpupload getinfo getinmemory http-post httpput \
https multi-app multi-debugcallback multi-double multi-post multi-single \
persistant post-callback postit2 sepheaders simple simplepost simplessl \
- sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard
+ sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard \
+ smtp-multi.c
# These examples require external dependencies that may not be commonly
# available on POSIX systems, so don't bother attempting to compile them here.
diff --git a/docs/examples/smtp-multi.c b/docs/examples/smtp-multi.c
new file mode 100644
index 000000000..0a7aeebf9
--- /dev/null
+++ b/docs/examples/smtp-multi.c
@@ -0,0 +1,196 @@
+/*****************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ *
+ * This is an example application source code sending SMTP mail using the
+ * multi interface.
+ */
+
+#include <string.h>
+#include <curl/curl.h>
+
+/*
+ * This is the list of basic details you need to tweak to get things right.
+ */
+#define USERNAME "user@example.com"
+#define PASSWORD "123qwerty"
+#define SMTPSERVER "smtp.example.com"
+#define SMTPPORT ":587" /* it is a colon+port string, but you can set it
+ to "" to use the default port */
+#define RECEPIENT "receipient@example.com"
+#define MAILFROM "<realuser@example.com>"
+
+#define MULTI_PERFORM_HANG_TIMEOUT 60 * 1000
+
+/* Note that you should include the actual meta data headers here as well if
+ you want the mail to have a Subject, another From:, show a To: or whatever
+ you think your mail should feature! */
+static const char *text[]={
+ "one\n",
+ "two\n",
+ "three\n",
+ " Hello, this is CURL email SMTP\n",
+ NULL
+};
+
+struct WriteThis {
+ int counter;
+};
+
+static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp)
+{
+ struct WriteThis *pooh = (struct WriteThis *)userp;
+ const char *data;
+
+ if(size*nmemb < 1)
+ return 0;
+
+ data = text[pooh->counter];
+
+ if(data) {
+ size_t len = strlen(data);
+ memcpy(ptr, data, len);
+ pooh->counter++; /* advance pointer */
+ return len;
+ }
+ return 0; /* no more data left to deliver */
+}
+
+static struct timeval tvnow(void)
+{
+ /*
+ ** time() returns the value of time in seconds since the Epoch.
+ */
+ struct timeval now;
+ now.tv_sec = (long)time(NULL);
+ now.tv_usec = 0;
+ return now;
+}
+
+static long tvdiff(struct timeval newer, struct timeval older)
+{
+ return (newer.tv_sec-older.tv_sec)*1000+
+ (newer.tv_usec-older.tv_usec)/1000;
+}
+
+int main(void)
+{
+ CURL *curl;
+ CURLM *mcurl;
+ int still_running = 1;
+ struct timeval mp_start;
+ char mp_timedout = 0;
+ struct WriteThis pooh;
+ struct curl_slist* rcpt_list = NULL;
+
+ pooh.counter = 0;
+
+ curl_global_init(CURL_GLOBAL_DEFAULT);
+
+ curl = curl_easy_init();
+ if(!curl)
+ return 1;
+
+ mcurl = curl_multi_init();
+ if(!mcurl)
+ return 2;
+
+ rcpt_list = curl_slist_append(rcpt_list, RECEPIENT);
+ /* more addresses can be added here
+ rcpt_list = curl_slist_append(rcpt_list, "others@example.com");
+ */
+
+ curl_easy_setopt(curl, CURLOPT_URL, "smtp://" SMTPSERVER SMTPPORT);
+ curl_easy_setopt(curl, CURLOPT_USERNAME, USERNAME);
+ curl_easy_setopt(curl, CURLOPT_PASSWORD, PASSWORD);
+ curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
+ curl_easy_setopt(curl, CURLOPT_MAIL_FROM, MAILFROM);
+ curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, rcpt_list);
+ curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
+ curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER,0);
+ curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
+ curl_easy_setopt(curl, CURLOPT_READDATA, &pooh);
+ curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+ curl_easy_setopt(curl, CURLOPT_SSLVERSION, 0);
+ curl_easy_setopt(curl, CURLOPT_SSL_SESSIONID_CACHE, 0);
+ curl_multi_add_handle(mcurl, curl);
+
+ mp_timedout = 0;
+ mp_start = tvnow();
+
+ /* we start some action by calling perform right away */
+ curl_multi_perform(mcurl, &still_running);
+
+ while(still_running) {
+ struct timeval timeout;
+ int rc; /* select() return code */
+
+ fd_set fdread;
+ fd_set fdwrite;
+ fd_set fdexcep;
+ int maxfd = -1;
+
+ long curl_timeo = -1;
+
+ FD_ZERO(&fdread);
+ FD_ZERO(&fdwrite);
+ FD_ZERO(&fdexcep);
+
+ /* set a suitable timeout to play around with */
+ timeout.tv_sec = 1;
+ timeout.tv_usec = 0;
+
+ curl_multi_timeout(mcurl, &curl_timeo);
+ if(curl_timeo >= 0) {
+ timeout.tv_sec = curl_timeo / 1000;
+ if(timeout.tv_sec > 1)
+ timeout.tv_sec = 1;
+ else
+ timeout.tv_usec = (curl_timeo % 1000) * 1000;
+ }
+
+ /* get file descriptors from the transfers */
+ curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd);
+
+ /* In a real-world program you OF COURSE check the return code of the
+ function calls. On success, the value of maxfd is guaranteed to be
+ greater or equal than -1. We call select(maxfd + 1, ...), specially in
+ case of (maxfd == -1), we call select(0, ...), which is basically equal
+ to sleep. */
+
+ rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
+
+ if (tvdiff(tvnow(), mp_start) > MULTI_PERFORM_HANG_TIMEOUT) {
+ fprintf(stderr, "ABORTING TEST, since it seems "
+ "that it would have run forever.\n");
+ break;
+ }
+
+ switch(rc) {
+ case -1:
+ /* select error */
+ break;
+ case 0:
+ /* timeout, do something else */
+ break;
+ default:
+ /* one or more of curl's file descriptors say there's data to read
+ or write */
+ curl_multi_perform(mcurl, &still_running);
+ break;
+ }
+ }
+
+ curl_slist_free_all(rcpt_list);
+ curl_multi_remove_handle(mcurl, curl);
+ curl_multi_cleanup(mcurl);
+ curl_easy_cleanup(curl);
+ curl_global_cleanup();
+ return 0;
+}
+
+