Added multi-post.c, based on the source file posted by Gustaf Hui

docs/examples/Makefile.am

@@ -8,7 +8,7 @@ EXTRA_DIST = README curlgtk.c sepheaders.c simple.c postit2.c \
 	     win32sockets.c persistant.c ftpget.c Makefile.example \
 	     multithread.c getinmemory.c ftpupload.c httpput.c \
 	     simplessl.c ftpgetresp.c http-post.c post-callback.c \
-	     multi-app.c multi-double.c multi-single.c
+	     multi-app.c multi-double.c multi-single.c multi-post.c
 
 all:
 	@echo "done"

docs/examples/multi-post.c

+/*****************************************************************************
+ *                                  _   _ ____  _     
+ *  Project                     ___| | | |  _ \| |    
+ *                             / __| | | | |_) | |    
+ *                            | (__| |_| |  _ <| |___ 
+ *                             \___|\___/|_| \_\_____|
+ *
+ * $Id$
+ *
+ * This is an example application source code using the multi interface
+ * to do a multipart formpost without "blocking".
+ */
+#include <stdio.h>
+#include <string.h>
+#include <sys/time.h>
+
+#include <curl/curl.h>
+
+int main(int argc, char *argv[])
+{
+  CURL *curl;
+  CURLcode res;
+
+  CURLM *multi_handle;
+  int still_running;
+
+  struct HttpPost *formpost=NULL;
+  struct HttpPost *lastptr=NULL;
+  struct curl_slist *headerlist=NULL;
+  char buf[] = "Expect:";
+
+  /* Fill in the file upload field */
+  curl_formadd(&formpost,
+               &lastptr,
+               CURLFORM_COPYNAME, "sendfile",
+               CURLFORM_FILE, "postit2.c",
+               CURLFORM_END);
+
+  /* Fill in the filename field */
+  curl_formadd(&formpost,
+               &lastptr,
+               CURLFORM_COPYNAME, "filename",
+               CURLFORM_COPYCONTENTS, "postit2.c",
+               CURLFORM_END);
+
+
+  /* Fill in the submit field too, even if this is rarely needed */
+  curl_formadd(&formpost,
+               &lastptr,
+               CURLFORM_COPYNAME, "submit",
+               CURLFORM_COPYCONTENTS, "send",
+               CURLFORM_END);
+
+  curl = curl_easy_init();
+  multi_handle = curl_multi_init();
+
+  /* initalize custom header list (stating that Expect: 100-continue is not
+     wanted */
+  headerlist = curl_slist_append(headerlist, buf);
+  if(curl && multi_handle) {
+    int perform=0;
+
+    /* what URL that receives this POST */
+    curl_easy_setopt(curl, CURLOPT_URL,
+                     "http://www.fillinyoururl.com/upload.cgi");
+    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+
+    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
+    curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
+
+    curl_multi_add_handle(multi_handle, curl);
+
+    while(CURLM_CALL_MULTI_PERFORM ==
+          curl_multi_perform(multi_handle, &still_running));
+
+    while(still_running) {
+      struct timeval timeout;
+      int rc; /* select() return code */
+
+      fd_set fdread;
+      fd_set fdwrite;
+      fd_set fdexcep;
+      int maxfd;
+
+      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;
+
+      /* get file descriptors from the transfers */
+      curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
+
+      rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
+
+      switch(rc) {
+      case -1:
+        /* select error */
+        break;
+      case 0:
+        printf("timeout!\n");
+      default:
+        /* timeout or readable/writable sockets */
+        printf("perform!\n");
+        while(CURLM_CALL_MULTI_PERFORM ==
+              curl_multi_perform(multi_handle, &still_running));
+        printf("running: %d!\n", still_running);
+        break;
+      }
+    }
+
+    curl_multi_cleanup(multi_handle);
+
+    /* always cleanup */
+    curl_easy_cleanup(curl);
+
+    /* then cleanup the formpost chain */
+    curl_formfree(formpost);
+
+    /* free slist */
+    curl_slist_free_all (headerlist);
+  }
+  return 0;
+}