Add version info

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>

main/service/webserver.c

@@ -87,5 +87,7 @@ void start_webserver(void)
     register_ws_endpoint(server);
     register_control_endpoint(server);
     register_reboot_endpoint(server);
+    register_version_endpoint(server);
+
     init_status_monitor();
 }

main/service/webserver.h

@@ -15,5 +15,6 @@ void register_control_endpoint(httpd_handle_t server);
 void push_data_to_ws(const uint8_t* data, size_t len);
 void register_reboot_endpoint(httpd_handle_t server);
 esp_err_t change_baud_rate(int baud_rate);
+void register_version_endpoint(httpd_handle_t server);
 
 #endif // ODROID_REMOTE_HTTP_WEBSERVER_H

main/system/system.c

@@ -77,3 +77,19 @@ void register_reboot_endpoint(httpd_handle_t server)
         .uri = "/api/reboot", .method = HTTP_POST, .handler = reboot_post_handler, .user_ctx = NULL};
     httpd_register_uri_handler(server, &post_uri);
 }
+
+static esp_err_t version_get_handler(httpd_req_t* req)
+{
+    httpd_resp_set_type(req, "application/json");
+    char buf[100];
+    sprintf(buf, "{\"version\": \"%s\"}", VERSION_HASH);
+    httpd_resp_send(req, buf, strlen(buf));
+    return ESP_OK;
+}
+
+void register_version_endpoint(httpd_handle_t server)
+{
+    httpd_uri_t post_uri = {
+        .uri = "/api/version", .method = HTTP_GET, .handler = version_get_handler, .user_ctx = NULL};
+    httpd_register_uri_handler(server, &post_uri);
+}