From 5dca779a92c7b8896232d362b03a96718ee58c7a Mon Sep 17 00:00:00 2001
From: Jeremy Tan <jeremy@jx.tan.fake>
Date: Wed, 14 Aug 2013 16:31:00 +0800
Subject: [PATCH] Update fastcgi stuff

---
 testing/fastcgi-approach/fastcgi_test.c       | 72 +++++++++++++++----
 .../fastcgi-approach/nginx_server_config.txt  |  9 ++-
 testing/sqlite-approach/README.txt            |  2 +
 3 files changed, 67 insertions(+), 16 deletions(-)

diff --git a/testing/fastcgi-approach/fastcgi_test.c b/testing/fastcgi-approach/fastcgi_test.c
index c881a24..40543c6 100644
--- a/testing/fastcgi-approach/fastcgi_test.c
+++ b/testing/fastcgi-approach/fastcgi_test.c
@@ -1,23 +1,67 @@
 #include "fcgi_stdio.h" /* fcgi library; put it first*/
 #include <stdlib.h>
 
+/*
+	But the suggestion was: FunctionName, variable_name (local or member),
+    Structure, ENUMVALUE, Extern_FunctionName, g_global
+*/
+
+typedef struct Data Data;
+
+typedef void (*ModuleHandler) (Data *data, const char *params);
+
+static void SensorsHandler(Data *data, const char *params) {
+    printf("Sensors module!<br>");
+}
+
+/*
+   API Schema:
+   Sensors:
+   /cgi/sensors?get=x
+   *get=x is optional. Retrieves info for sensor with id x
+   Devices:
+   /cgi/devices?status=x&power=y&id=z
+   *status and power is optional
+   *status retrieves whether device with id x is operational
+   *power tells whether or not to power on/off the device with id z
+   
+   Response format:
+   200 OK if request was ok
+   400 bad request for malformed request
+      
+*/
 int main (int argc, char *argv[])
 {
+  Data *data = NULL;
   int count = 0;
 
-  //Spawn thread to get sensor data here?
-  //Response loop
-	while (FCGI_Accept() >= 0)   {
-		printf("Content-type: text/html\r\n"
-			   "\r\n"
-			   "<title>FastCGI Hello! (C, fcgi_stdio library)</title>"
-			   "<h1>FastCGI Hello! (C, fcgi_stdio library)</h1>"
-			   "Request number %d running on host <i>%s</i>\n",
-			   count++, getenv("SERVER_HOSTNAME"));
+  //FCGI Accept loop
+  while (FCGI_Accept() >= 0)   {
+    ModuleHandler module_handler = NULL;
+    const char *module = getenv("DOCUMENT_URI_LOCAL");
+    const char *params = getenv("QUERY_STRING");
 
-		char *data = getenv("QUERY_STRING");
-		if (data) {
-			printf("<br>Query string is: '%s'\n", data);
-		}
-	}
+    if (!strcmp("sensors", module)) {
+        module_handler = SensorsHandler; //Replace with pointer to sensors handler
+    } else if (!strcmp("admin"), module) {
+        module_handler = NULL; //Replace with pointer to admin handler
+        printf("Admin module selected!\n");
+    }
+    
+    if (module_handler) {
+        printf("Content-type: text/html\r\n\r\n"); //Replace with actual type
+        module_handler(data, params);
+    } else {
+        printf("Status: 400 Bad Request\r\n"
+               "Content-type: text/html\r\n\r\n"
+               "<title>400 Bad Request</title>\n"
+               "Unknown module '%s' selected.<br>\n",
+               module);   
+    }
+    
+    //Debgging:
+    printf("Module: %s, Params: %s<br>\n", module, params);
+    printf("Request number %d, host <i>%s</i>\n",
+        count++, getenv("SERVER_HOSTNAME"));
+  }
 }
diff --git a/testing/fastcgi-approach/nginx_server_config.txt b/testing/fastcgi-approach/nginx_server_config.txt
index 6642639..c76a4e5 100644
--- a/testing/fastcgi-approach/nginx_server_config.txt
+++ b/testing/fastcgi-approach/nginx_server_config.txt
@@ -1,14 +1,19 @@
         #Custom cgi
-        location /cgi/ {
+        location ~ ^/cgi/([^?]*) {
                 fastcgi_pass 127.0.0.1:9005;
                 fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
                 fastcgi_param  SERVER_HOSTNAME    mctxsoft;
                 fastcgi_param  SERVER_SOFTWARE    nginx;
+
+                #Regex removed /cgi/ part, and any args
+                fastcgi_param  DOCUMENT_URI_LOCAL  $1;
                 fastcgi_param  QUERY_STRING       $query_string;
+
+                #Unused for now
                 fastcgi_param  REQUEST_METHOD     $request_method;
                 fastcgi_param  CONTENT_TYPE       $content_type;
                 fastcgi_param  CONTENT_LENGTH     $content_length;
-                fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script_name
+                fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script$
                 fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
                 fastcgi_param  REQUEST_URI        $request_uri;
                 fastcgi_param  DOCUMENT_URI       $document_uri;
diff --git a/testing/sqlite-approach/README.txt b/testing/sqlite-approach/README.txt
index b7d3e9c..8f2e398 100644
--- a/testing/sqlite-approach/README.txt
+++ b/testing/sqlite-approach/README.txt
@@ -1,3 +1,5 @@
+Note: Should be discarded in favour of the fastcgi approach
+
 SQLite approach to interfacing with web frontend:
 
 *Main program reads in sensor data and updates the sqlite database 
-- 
2.20.1