/**
* @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(×tamp));
+ 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.
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:
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
+ * ¶m 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;
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) {
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);
-}