examples: Added POP3 RETR example

docs/examples/Makefile.inc

@@ -5,9 +5,9 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \
   persistant post-callback postit2 sepheaders simple simplepost simplessl  \
   sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard \
   smtp-multi smtp-send smtp-ssl smtp-tls smtp-vrfy smtp-expn rtsp \
-  externalsocket resolve progressfunc pop3-list pop3-ssl imap-list imap-fetch \
+  externalsocket resolve progressfunc pop3-retr pop3-list pop3-ssl imap-list \
-  imap-store imap-append imap-examine imap-search imap-create imap-delete \
+  imap-fetch imap-store imap-append imap-examine imap-search imap-create \
-  imap-copy imap-ssl imap-tls url2file sftpget ftpsget postinmemory
+  imap-delete imap-copy imap-ssl imap-tls url2file sftpget ftpsget postinmemory
 
 # These examples require external dependencies that may not be commonly
 # available on POSIX systems, so don't bother attempting to compile them here.

docs/examples/pop3-retr.c

@@ -0,0 +1,58 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+#include <stdio.h>
+#include <curl/curl.h>
+
+/* This is a simple example showing how to retrieve mail using libcurl's POP3
+ * capabilities.
+ *
+ * Note that this example requires libcurl 7.20.0 or above.
+ */
+
+int main(void)
+{
+  CURL *curl;
+  CURLcode res = CURLE_OK;
+
+  curl = curl_easy_init();
+  if(curl) {
+    /* Set username and password */
+    curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
+    curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
+
+    /* This will retreive message 1 from the user's mailbox */
+    curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1");
+
+    /* Perform the retr */
+    res = curl_easy_perform(curl);
+
+    /* Check for errors */
+    if(res != CURLE_OK)
+      fprintf(stderr, "curl_easy_perform() failed: %s\n",
+              curl_easy_strerror(res));
+
+    /* Always cleanup */
+    curl_easy_cleanup(curl);
+  }
+
+  return (int)res;
+}

docs/examples/pop3-ssl.c

@@ -23,7 +23,8 @@
 #include <curl/curl.h>
 
 /* This is a simple example showing how to retrieve mail using libcurl's POP3
- * capabilities.
+ * capabilities. It builds on the pop3-retr.c example adding transport
+ * security to protect the authentication details from being snooped.
  *
  * Note that this example requires libcurl 7.20.0 or above.
  */