#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;
+#define LOGIN_TIMEOUT 180
+
+
+struct FCGIContext {
+ /**The time of last valid logged-in user access*/
+ time_t login_timestamp;
+ char login_key[41];
+ char login_ip[16];
+ /**The name of the current module**/
+ const char *current_module;
+ /**For debugging purposes?**/
+ int response_number;
+};
+
+/**
+ * Handles user logins.
+ * @param context The context to work in
+ * @param params User specified parameters
+ */
+static void LoginHandler(FCGIContext *context, char *params) {
const char *key, *value;
- int force = 0, end = 0;
+ bool force = 0, end = 0;
while ((params = FCGI_KeyPair(params, &key, &value))) {
if (!strcmp(key, "force"))
}
if (end) {
- *loginkey = 0;
- FCGI_BeginJSON(200, "login");
+ *(context->login_key) = 0;
+ FCGI_BeginJSON(context, STATUS_OK);
FCGI_EndJSON();
return;
}
time_t now = time(NULL);
- if (force || !*loginkey || (now - timestamp > 180)) {
+ if (force || !*(context->login_key) ||
+ (now - context->login_timestamp > LOGIN_TIMEOUT))
+ {
SHA_CTX sha1ctx;
unsigned char sha1[20];
int i = rand();
SHA1_Update(&sha1ctx, &i, sizeof(i));
SHA1_Final(sha1, &sha1ctx);
- timestamp = now;
+ context->login_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);
+ sprintf(context->login_key + i * 2, "%02x", sha1[i]);
+ snprintf(context->login_ip, 16, "%s", getenv("REMOTE_ADDR"));
+ FCGI_BeginJSON(context, STATUS_OK);
+ FCGI_JSONPair("key", context->login_key);
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);
+ strftime(buf, 128, "%H:%M:%S %d-%m-%Y",
+ localtime(&(context->login_timestamp)));
+ FCGI_BeginJSON(context, STATUS_UNAUTHORIZED);
+ FCGI_JSONPair("description", "Already logged in");
+ FCGI_JSONPair("user", context->login_ip);
+ FCGI_JSONPair("time", buf);
FCGI_EndJSON();
}
}
+/**
+ * Given an FCGIContext, determines if the current user (as specified by
+ * the key) is authorized or not. If validated, the context login_timestamp is
+ * updated.
+ * @param context The context to work in
+ * @param key The login key to be validated.
+ * @return TRUE if authorized, FALSE if not.
+ */
+int FCGI_Authorized(FCGIContext *context, const char *key) {
+ time_t now = time(NULL);
+ int result = (now - context->login_timestamp) <= LOGIN_TIMEOUT &&
+ !strcmp(context->login_key, key);
+ if (result) {
+ context->login_timestamp = now; //Update the login_timestamp
+ }
+ return result;
+}
+
/**
* Extracts a key/value pair from a request string.
* Note that the input is modified by this function.
/**
* 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.
+ * @param context The context to work in.
+ * @param status_code The status code to be returned.
*/
-void FCGI_BeginJSON(StatusCodes status_code, const char *module)
+void FCGI_BeginJSON(FCGIContext *context, StatusCodes status_code)
{
- switch (status_code) {
- case STATUS_OK:
- break;
- case STATUS_UNAUTHORIZED:
- printf("Status: 401 Unauthorized\r\n");
- break;
- default:
- printf("Status: 400 Bad Request\r\n");
- }
printf("Content-type: application/json; charset=utf-8\r\n\r\n");
printf("{\r\n");
- printf("\t\"module\" : \"%s\"", module);
+ printf("\t\"module\" : \"%s\"", context->current_module);
+ FCGI_JSONLong("status", status_code);
}
/**
* @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)
+void FCGI_JSONPair(const char *key, const char *value)
{
printf(",\r\n\t\"%s\" : \"%s\"", key, value);
}
+/**
+ * Similar to FCGI_JSONPair except for signed integer values.
+ * @param key The key of the JSON entry
+ * @param value The value associated with the key
+ */
+void FCGI_JSONLong(const char *key, long value)
+{
+ printf(",\r\n\t\"%s\" : %ld", key, value);
+}
+
+/**
+ * Similar to FCGI_JsonPair except for floating point values.
+ * @param key The key of the JSON entry
+ * @param value The value associated with the key
+ */
+void FCGI_JSONDouble(const char *key, double value)
+{
+ printf(",\r\n\t\"%s\" : %f", key, value);
+}
+
+/**
+ * Begins a JSON entry by writing the key. To be used in conjunction
+ * with FCGI_JsonValue.
+ * @param key The key of the JSON entry
+ */
+void FCGI_JSONKey(const char *key)
+{
+ printf(",\r\n\t\"%s\" : ", key);
+}
+
+/**
+ * Should be used to write out the value of a JSON key. This has
+ * the same format as the printf functions. Care should be taken to format
+ * the output in valid JSON.
+ */
+void FCGI_JSONValue(const char *format, ...)
+{
+ va_list list;
+ va_start(list, format);
+ vprintf(format, list);
+ va_end(list);
+}
+
/**
* Ends a JSON response that was initiated by FCGI_BeginJSON.
*/
printf("\r\n}\r\n");
}
+/**
+ * To be used when the input parameters are invalid.
+ * Sends a response with HTTP status 400 Bad request, along with
+ * JSON data for debugging.
+ * @param context The context to work in
+ * @param params The parameters that the module handler received.
+ */
+void FCGI_RejectJSON(FCGIContext *context, const char *params)
+{
+ printf("Status: 400 Bad Request\r\n");
+
+ FCGI_BeginJSON(context, STATUS_ERROR);
+ FCGI_JSONPair("description", "Invalid request");
+ FCGI_JSONLong("responsenumber", context->response_number);
+ FCGI_JSONPair("params", params);
+ FCGI_JSONPair("host", getenv("SERVER_HOSTNAME"));
+ FCGI_JSONPair("user", getenv("REMOTE_USER"));
+ FCGI_JSONPair("ip", getenv("REMOTE_ADDR"));
+ 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.
+ * @param data Reserved.
*/
void FCGI_RequestLoop (void *data)
{
- int count = 0;
- while (FCGI_Accept() >= 0) {
+ FCGIContext context = {0};
+
+ while (FCGI_Accept() >= 0) {
ModuleHandler module_handler = NULL;
char module[BUFSIZ], params[BUFSIZ];
-
+
//strncpy doesn't zero-truncate properly
snprintf(module, BUFSIZ, "%s", getenv("DOCUMENT_URI_LOCAL"));
snprintf(params, BUFSIZ, "%s", getenv("QUERY_STRING"));
}
+ context.current_module = module;
if (module_handler) {
- module_handler(data, params);
+ module_handler(&context, params);
} else {
- char buf[BUFSIZ];
-
- FCGI_BeginJSON(400, module);
- FCGI_BuildJSON("description", "400 Invalid response");
- snprintf(buf, BUFSIZ, "%d", count);
- 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();
+ strncat(module, " [unknown]", BUFSIZ);
+ FCGI_RejectJSON(&context, params);
}
-
- count++;
+
+ context.response_number++;
}
}
#define _BSD_SOURCE
-#include "common.h"
#include "fastcgi.h"
+#include "common.h"
#include <time.h>
typedef struct Data {
volatile int sensor_value;
} Data;
-void Handler_Sensors(void *arg, char *params)
+Data data;
+
+void Handler_Sensors(FCGIContext *context, char *params)
{
const char *key, *value;
- char buf[5];
- Data *data = (Data*) arg;
-
+
//Begin a request only when you know the final result
//E.g whether OK or not.
- FCGI_BeginJSON(STATUS_OK, "sensors");
+ FCGI_BeginJSON(context, STATUS_OK);
while ((params = FCGI_KeyPair(params, &key, &value))) {
- FCGI_BuildJSON(key, value);
+ FCGI_JSONPair(key, value);
}
- pthread_mutex_lock(&(data->mutex));
- snprintf(buf, 128, "%d", data->sensor_value);
- FCGI_BuildJSON("sensor_value", buf);
- pthread_mutex_unlock(&(data->mutex));
+ pthread_mutex_lock(&(data.mutex));
+ FCGI_JSONLong("sensor_value", data.sensor_value);
+ pthread_mutex_unlock(&(data.mutex));
FCGI_EndJSON();
}
void *SensorsLoop(void *arg) {
- Data *data = (Data*) arg;
srand(time(NULL));
//Csection
while(1) {
- pthread_mutex_lock(&(data->mutex));
- data->sensor_value = rand() % 1024;
- pthread_mutex_unlock(&(data->mutex));
+ pthread_mutex_lock(&(data.mutex));
+ data.sensor_value = rand() % 1024;
+ pthread_mutex_unlock(&(data.mutex));
usleep(200*1000); //200ms
}
}
int main(int argc, char *argv[]) {
- Data data = {0};
pthread_mutex_init(&(data.mutex), NULL);
//data.mutex = PTHREAD_MUTEX_INITIALIZER;
-
-// pthread_create(&data.sensors, NULL, SensorsLoop, &data);
+
+ pthread_create(&data.sensors, NULL, SensorsLoop, &data);
FCGI_RequestLoop(&data);
}
git.ucc.asn.au / matches / MCTX3420.git / commitdiff
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