2 files changed, 145 insertions, 0 deletions
diff --git a/contrib/examples/httpd/cgi_example/cgi_example.c b/contrib/examples/httpd/cgi_example/cgi_example.c
new file mode 100644
index 00000000000..c9c74763bb6
--- /dev/null
+++ b/contrib/examples/httpd/cgi_example/cgi_example.c
@@ -0,0 +1,107 @@
+/**
+ * @file
+ * HTTPD simple CGI example
+ *
+ * This file demonstrates how to add support for basic CGI.
+ */
+ 
+ /*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+
+#include "lwip/opt.h"
+#include "cgi_example.h"
+
+#include "lwip/apps/httpd.h"
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+
+#include <stdio.h>
+#include <string.h>
+
+/** define LWIP_HTTPD_EXAMPLE_CGI_SIMPLE to 1 to enable this cgi example */
+#ifndef LWIP_HTTPD_EXAMPLE_CGI_SIMPLE
+#define LWIP_HTTPD_EXAMPLE_CGI_SIMPLE 0
+#endif
+
+#if LWIP_HTTPD_EXAMPLE_CGI_SIMPLE
+
+#if !LWIP_HTTPD_CGI
+#error LWIP_HTTPD_EXAMPLE_CGI_SIMPLE needs LWIP_HTTPD_CGI
+#endif
+
+static const char *cgi_handler_basic(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
+
+static const tCGI cgi_handlers[] = {
+  {
+    "/basic_cgi",
+    cgi_handler_basic
+  },
+  {
+    "/basic_cgi_2",
+    cgi_handler_basic
+  }
+};
+
+void
+cgi_ex_init(void)
+{
+  http_set_cgi_handlers(cgi_handlers, LWIP_ARRAYSIZE(cgi_handlers));
+}
+
+/** This basic CGI function can parse param/value pairs and return an url that
+ * is sent as a response by httpd.
+ *
+ * This example function just checks that the input url has two key value
+ * parameter pairs: "foo=bar" and "test=123"
+ * If not, it returns 404
+ */
+static const char *
+cgi_handler_basic(int iIndex, int iNumParams, char *pcParam[], char *pcValue[])
+{
+  LWIP_ASSERT("check index", iIndex < LWIP_ARRAYSIZE(cgi_handlers));
+
+  if (iNumParams == 2) {
+    if (!strcmp(pcParam[0], "foo")) {
+      if (!strcmp(pcValue[0], "bar")) {
+        if (!strcmp(pcParam[1], "test")) {
+          if (!strcmp(pcValue[1], "123")) {
+            return "/index.html";
+          }
+        }
+      }
+    }
+  }
+  return "/404.html";
+}
+
+#endif /* LWIP_HTTPD_EXAMPLE_CGI_SIMPLE */
diff --git a/contrib/examples/httpd/cgi_example/cgi_example.h b/contrib/examples/httpd/cgi_example/cgi_example.h
new file mode 100644
index 00000000000..b655661b364
--- /dev/null
+++ b/contrib/examples/httpd/cgi_example/cgi_example.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2017 Simon Goldschmidt
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+
+#ifndef LWIP_HDR_HTTP_EXAMPLES_CGI_EXAMPLE
+#define LWIP_HDR_HTTP_EXAMPLES_CGI_EXAMPLE
+
+void cgi_ex_init(void);
+
+#endif /* LWIP_HDR_HTTP_EXAMPLES_CGI_EXAMPLE */