C webapp

1 files changed, 98 insertions, 0 deletions

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..f01d928
--- /dev/null
+++ b/main.c
@@ -0,0 +1,98 @@
+#include <sys/types.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <microhttpd.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "monitor.h"
+
+#define PORT        8888
+#define RES_BUFF    65535
+
+static char *index_format_template = NULL;
+
+
+enum MHD_Result answer_to_connection(
+    void *cls, struct MHD_Connection *connection,
+    const char *url,
+    const char *method,
+    const char *version,
+    const char *upload_data,
+    size_t *upload_data_size,
+    void **ptr
+) {
+    char buff[RES_BUFF];
+
+    const struct sockaddr_in **coninfo =
+        (const struct sockaddr_in**)MHD_get_connection_info(
+            connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS);
+
+    printf("%s - %s %s: ", inet_ntoa((*coninfo)->sin_addr), method, url);
+
+    struct MHD_Response *response;
+    int ret;
+
+    if (strcmp(method, "GET") == 0 && strcmp(url, "/") == 0) {
+        snprintf(buff, RES_BUFF,
+            index_format_template, monitor_generate_status_html());
+
+        response = MHD_create_response_from_buffer(strlen(buff), (void*)buff,
+            MHD_RESPMEM_PERSISTENT);
+
+        printf("%d\n", 200);
+        ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
+        MHD_destroy_response(response);
+    }
+    else {
+        response = MHD_create_response_from_buffer(0, (void*)NULL, 0);
+        printf("%d\n", 418);
+        ret = MHD_queue_response(connection, 418, response);
+        MHD_destroy_response(response);
+    }
+    return ret;
+}
+
+int main() {
+    /* read index template file */
+    FILE *tf = fopen("index.htm.tmpl", "r");
+    if (!tf) {
+        fprintf(stderr, "error opening index template file: %s\n",
+            strerror(errno));
+        return 1;
+    }
+    fseek(tf, 0, SEEK_END);
+    size_t tfs = ftell(tf);
+    rewind(tf);
+    index_format_template = malloc(tfs);
+    fread(index_format_template, 1, tfs, tf);
+    fclose(tf);
+
+    /* start server */
+    struct MHD_Daemon *daemon;
+
+    daemon = MHD_start_daemon(
+        MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_EPOLL,
+        PORT, NULL, NULL,
+        &answer_to_connection, NULL, MHD_OPTION_END);
+
+    if (!daemon) {
+        fprintf(stderr, "error starting libmicrohttpd daemon: \n");
+        return 1;
+    }
+
+    monitor_init("monitor.cfg");
+
+    while (1) {
+        monitor_check();
+        sleep(5);
+    }
+}
+