Merge branch 'master' of https://github.com/szmoore/MCTX3420.git

[matches/MCTX3420.git] / testing / fastcgi-approach / fastcgi.c

diff --git a/testing/fastcgi-approach/fastcgi.c b/testing/fastcgi-approach/fastcgi.c
index c2444c8..a518c7a 100644 (file)
--- a/testing/fastcgi-approach/fastcgi.c
+++ b/testing/fastcgi-approach/fastcgi.c
@@ -1,24 +1,65 @@
 /**
  * @file fastcgi.c
  * @purpose Runs the FCGI request loop to handle web interface requests.
- * 
- * <stdio.h> should not be included, because these functions are handled by
- * fcgi_stdio.h. If included, it must be included after fcgi_stdio.h.
+ *
+ * fcgi_stdio.h must be included before all else so the stdio function
+ * redirection works ok.
  */
- 
+
 #include <fcgi_stdio.h>
-#include <string.h>
-#include <stdlib.h>
+#include <openssl/sha.h>
+#include "fastcgi.h"
+#include "common.h"
+#include <time.h>
+
+static void LoginHandler(void *data, char *params) {
+       static char loginkey[41] = {0}, ip[256];
+       static time_t timestamp = 0;
+       const char *key, *value;
+       int force = 0, end = 0;
+
+       while ((params = FCGI_KeyPair(params, &key, &value))) {
+               if (!strcmp(key, "force"))
+                       force = !force;
+               else if (!strcmp(key, "end"))
+                       end = !end;
+       }
+
+       if (end) {
+               *loginkey = 0;
+               FCGI_BeginJSON(200, "login");
+               FCGI_EndJSON();
+               return;
+       }
 
-/*
-       But the suggestion was: FunctionName, variable_name (local or member),
-    Structure, ENUMVALUE, Extern_FunctionName, g_global
-*/
+       time_t now = time(NULL);
+       if (force || !*loginkey || (now - timestamp > 180)) {
+               SHA_CTX sha1ctx;
+               unsigned char sha1[20];
+               int i = rand();
 
-enum {STATUS_OK = 200, STATUS_BADREQUEST = 400,
-         STATUS_UNAUTHORIZED = 401};
+               SHA1_Init(&sha1ctx);
+               SHA1_Update(&sha1ctx, &now, sizeof(now));
+               SHA1_Update(&sha1ctx, &i, sizeof(i));
+               SHA1_Final(sha1, &sha1ctx);
 
-typedef void (*ModuleHandler) (void *data, char *params);
+               timestamp = now;
+               for (i = 0; i < 20; i++)
+                       sprintf(loginkey+i*2, "%02x", sha1[i]);
+               sprintf(ip, "%s", getenv("REMOTE_ADDR"));
+               FCGI_BeginJSON(200, "login");
+               FCGI_BuildJSON("key", loginkey);
+               FCGI_EndJSON();
+       } else {
+               char buf[128];
+               strftime(buf, 128, "%H:%M:%S %d-%m-%Y",localtime(&timestamp)); 
+               FCGI_BeginJSON(401, "login");
+               FCGI_BuildJSON("description", "Already logged in");
+               FCGI_BuildJSON("user", ip); 
+               FCGI_BuildJSON("time", buf);
+               FCGI_EndJSON();
+       }
+}
 
 /**
  * Extracts a key/value pair from a request string.
@@ -59,7 +100,12 @@ char *FCGI_KeyPair(char *in, const char **key, const char **value)
        return ptr;
 }
 
-void FCGI_BeginJSON(int status_code, const char *module)
+/**
+ * Begins a response to the client in JSON format.
+ * @param status_code The HTTP status code to be returned.
+ * @param module The name of the module that initiated the response.
+ */
+void FCGI_BeginJSON(StatusCodes status_code, const char *module)
 {
        switch (status_code) {
                case STATUS_OK:
@@ -75,29 +121,29 @@ void FCGI_BeginJSON(int status_code, const char *module)
        printf("\t\"module\" : \"%s\"", module);
 }
 
+/**
+ * Adds a key/value pair to a JSON response. The response must have already
+ * been initiated by FCGI_BeginJSON. Note that characters are not escaped.
+ * @param key The key of the JSON entry
+ * &param value The value associated with the key.
+ */
 void FCGI_BuildJSON(const char *key, const char *value)
 {
        printf(",\r\n\t\"%s\" : \"%s\"", key, value);
 }
 
+/**
+ * Ends a JSON response that was initiated by FCGI_BeginJSON.
+ */
 void FCGI_EndJSON() 
 {
        printf("\r\n}\r\n");
 }
 
-static void SensorsHandler(void *data, char *params) 
-{
-       const char *key, *value;
-       
-       //Begin a request only when you know the final result
-       //E.g whether OK or not.
-       FCGI_BeginJSON(STATUS_OK, "sensors");
-       while ((params = FCGI_KeyPair(params, &key, &value))) {
-               FCGI_BuildJSON(key, value);
-       }
-       FCGI_EndJSON();
-}
-
+/**
+ * Main FCGI request loop that receives/responds to client requests.
+ * @param data A data field to be passed to the selected module handler.
+ */ 
 void FCGI_RequestLoop (void *data)
 {
        int count = 0;
@@ -116,9 +162,11 @@ void FCGI_RequestLoop (void *data)
                
 
                if (!strcmp("sensors", module)) {
-                       module_handler = SensorsHandler;
-               } else if (!strcmp("admin", module)) {
-                       //module_handler = AdminHandlerReplace with pointer to admin handler
+                       module_handler = Handler_Sensors;
+               } else if (!strcmp("login", module)) {
+                       module_handler = LoginHandler;
+               } else if (!strcmp("actuators", module)) {
+                       
                }
 
                if (module_handler) {
@@ -132,13 +180,11 @@ void FCGI_RequestLoop (void *data)
                        FCGI_BuildJSON("request-number", buf);
                        FCGI_BuildJSON("params", params);
                        FCGI_BuildJSON("host", getenv("SERVER_HOSTNAME"));
+                       FCGI_BuildJSON("user", getenv("REMOTE_USER"));
+                       FCGI_BuildJSON("userip", getenv("REMOTE_ADDR"));
                        FCGI_EndJSON();
                }
 
                count++;
        }
 }
-
-int main(int argc, char *argv[]) {
-       FCGI_RequestLoop(NULL);
-}