Added example for handling POST requests.

examples/Makefile

@@ -4,4 +4,5 @@ all:
 	OS=`uname`; \
 	  test "$$OS" = Linux && LIBS="-ldl" ; \
 	  $(CC) $(CFLAGS) hello.c ../mongoose.c  $$LIBS $(ADD) -o hello;
+	  $(CC) $(CFLAGS) post.c ../mongoose.c  $$LIBS $(ADD) -o post;
 	  $(CC) $(CFLAGS) chat.c ../mongoose.c  $$LIBS $(ADD) -o chat

examples/post.c

@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <string.h>
+#include "mongoose.h"
+
+static const char *html_form =
+  "<html><body>POST example."
+  "<form method=\"POST\" action=\"/handle_post_request\">"
+  "Input 1: <input type=\"text\" name=\"input_1\" /> <br/>"
+  "Input 2: <input type=\"text\" name=\"input_2\" /> <br/>"
+  "<input type=\"submit\" />"
+  "</form></body></html>";
+
+static void *callback(enum mg_event event,
+                      struct mg_connection *conn) {
+  const struct mg_request_info *ri = mg_get_request_info(conn);
+
+  if (event == MG_NEW_REQUEST) {
+    if (!strcmp(ri->uri, "/handle_post_request")) {
+      // User has submitted a form, show submitted data and a variable value
+      char post_data[1024],
+           input1[sizeof(post_data)], input2[sizeof(post_data)];
+      int post_data_len;
+
+      // Read POST data
+      post_data_len = mg_read(conn, post_data, sizeof(post_data));
+
+      // Parse form data. input1 and input2 are guaranteed to be NUL-terminated
+      mg_get_var(post_data, post_data_len, "input_1", input1, sizeof(input1));
+      mg_get_var(post_data, post_data_len, "input_2", input2, sizeof(input2));
+
+      mg_printf(conn, "HTTP/1.0 200 OK\r\n"
+                "Content-Type: text/plain\r\n\r\n"
+                "Submitted data: [%.*s]\n"
+                "Submitted data length: %d bytes\n"
+                "input_1: [%s]\n"
+                "input_2: [%s]\n",
+                post_data_len, post_data, post_data_len, input1, input2);
+    } else {
+      // Show HTML form.
+      mg_printf(conn, "HTTP/1.0 200 OK\r\n"
+                "Content-Length: %d\r\n"
+                "Content-Type: text/html\r\n\r\n%s",
+                (int) strlen(html_form), html_form);
+    }
+    // Mark as processed
+    return "";
+  } else {
+    return NULL;
+  }
+}
+
+int main(void) {
+  struct mg_context *ctx;
+  const char *options[] = {"listening_ports", "8080", NULL};
+
+  ctx = mg_start(&callback, NULL, options);
+  getchar();  // Wait until user hits "enter"
+  mg_stop(ctx);
+
+  return 0;
+}