Added http daemon

src/server/httpapi.c

@@ -0,0 +1,129 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <microhttpd.h>
+#include <glib.h>
+
+#include "server/log.h"
+#include "server/server.h"
+
+struct MHD_Daemon *httpdaemmon = NULL;
+
+#define POSTBUFFERSIZE 2048
+
+typedef struct conn_info_t {
+    GString *body;
+} ConnectionInfo;
+
+ConnectionInfo*
+create_connection_info(void)
+{
+    ConnectionInfo *con_info = malloc(sizeof(ConnectionInfo));
+    con_info->body = g_string_new("");
+
+    return con_info;
+}
+
+void
+destroy_connection_info(ConnectionInfo *con_info)
+{
+    if (con_info->body) {
+        g_string_free(con_info->body, TRUE);
+        con_info->body = NULL;
+    }
+    free(con_info);
+}
+
+int
+send_response(struct MHD_Connection* conn, const char* body, int status_code)
+{
+    struct MHD_Response* response;
+    if (body) {
+        response = MHD_create_response_from_data(strlen(body), (void*)body, MHD_NO, MHD_YES);
+    } else {
+        response = MHD_create_response_from_data(0, NULL, MHD_NO, MHD_YES);
+    }
+
+    if (!response)
+        return MHD_NO;
+
+    int ret = MHD_queue_response(conn, status_code, response);
+    MHD_destroy_response(response);
+    return ret;
+}
+
+int connection_cb(void* cls, struct MHD_Connection* conn, const char* url, const char* method,
+    const char* version, const char* data, size_t* size, void** con_cls)
+{
+    if (*con_cls == NULL) {
+        ConnectionInfo *con_info = create_connection_info();
+
+        if (g_strcmp0(method, "POST") == 0 && g_strcmp0(url, "/send") == 0) {
+            if (*size != 0) {
+                g_string_append_len(con_info->body, data, *size);
+                *size = 0;
+            }
+        } else {
+            return send_response(conn, NULL, MHD_HTTP_BAD_REQUEST);
+        }
+
+        *con_cls = (void*) con_info;
+
+        return MHD_YES;
+    }
+
+    ConnectionInfo *con_info = (ConnectionInfo*) *con_cls;
+
+    if (*size != 0) {
+        g_string_append_len(con_info->body, data, *size);
+        *size = 0;
+
+        return MHD_YES;
+    } else {
+        server_send(con_info->body->str);
+
+        return send_response(conn, NULL, MHD_HTTP_OK);
+    }
+}
+
+void request_completed(void* cls, struct MHD_Connection* conn,
+                       void** con_cls, enum MHD_RequestTerminationCode termcode)
+{
+    ConnectionInfo *con_info = (ConnectionInfo*) *con_cls;
+    if (con_info) {
+        destroy_connection_info(con_info);
+    }
+    con_info = NULL;
+    *con_cls = NULL;
+}
+
+int
+httpapi_start(int port)
+{
+    httpdaemmon = MHD_start_daemon(
+        MHD_USE_SELECT_INTERNALLY,
+        port,
+        NULL,
+        NULL,
+        &connection_cb,
+        NULL,
+        MHD_OPTION_NOTIFY_COMPLETED,
+        request_completed,
+        NULL, MHD_OPTION_END);
+
+    if (!httpdaemmon) {
+        return 0;
+    }
+
+    log_println("HTTP daemon started on port: %d", port);
+
+    return 1;
+}
+
+void
+httpapi_stop(void)
+{
+    MHD_stop_daemon(httpdaemmon);
+    log_println("HTTP daemon stopped.");
+}