1 files changed, 233 insertions, 0 deletions

diff --git a/src/service/rest/copying_plugin.c b/src/service/rest/copying_plugin.c
new file mode 100644
index 000000000..d907f6729
--- /dev/null
+++ b/src/service/rest/copying_plugin.c
@@ -0,0 +1,233 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2012-2018 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/**
+ * @author Martin Schanzenbach
+ * @file gns/plugin_rest_copying.c
+ * @brief REST plugin that serves licensing information.
+ *
+ */
+
+#include "platform.h"
+#include "gnunet_rest_plugin.h"
+#include <gnunet_rest_lib.h>
+
+#define GNUNET_REST_API_NS_COPYING "/copying"
+
+#define GNUNET_REST_COPYING_TEXT \
+        "GNU Affero General Public License version 3 or later. See also: <http://www.gnu.org/licenses/>"
+
+/**
+ * @brief struct returned by the initialization function of the plugin
+ */
+struct Plugin
+{
+  const struct GNUNET_CONFIGURATION_Handle *cfg;
+};
+
+struct RequestHandle
+{
+  /**
+   * DLL
+   */
+  struct RequestHandle *next;
+
+  /**
+   * DLL
+   */
+  struct RequestHandle *prev;
+
+  /**
+   * Handle to rest request
+   */
+  struct GNUNET_REST_RequestHandle *rest_handle;
+
+  /**
+   * The plugin result processor
+   */
+  GNUNET_REST_ResultProcessor proc;
+
+  /**
+   * The closure of the result processor
+   */
+  void *proc_cls;
+
+  /**
+   * HTTP response code
+   */
+  int response_code;
+};
+
+/**
+ * DLL
+ */
+static struct RequestHandle *requests_head;
+
+/**
+ * DLL
+ */
+static struct RequestHandle *requests_tail;
+
+/**
+ * Cleanup request handle.
+ *
+ * @param handle Handle to clean up
+ */
+static void
+cleanup_handle (struct RequestHandle *handle)
+{
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Cleaning up\n");
+  GNUNET_CONTAINER_DLL_remove (requests_head,
+                               requests_tail,
+                               handle);
+  GNUNET_free (handle);
+}
+
+
+/**
+ * Handle rest request
+ *
+ * @param handle the lookup handle
+ */
+static void
+get_cont (struct GNUNET_REST_RequestHandle *con_handle,
+          const char*url,
+          void *cls)
+{
+  struct MHD_Response *resp;
+  struct RequestHandle *handle = cls;
+
+  resp = GNUNET_REST_create_response (GNUNET_REST_COPYING_TEXT);
+  handle->proc (handle->proc_cls,
+                resp,
+                MHD_HTTP_OK);
+  cleanup_handle (handle);
+}
+
+
+/**
+ * Handle rest request
+ *
+ * @param handle the lookup handle
+ */
+static void
+options_cont (struct GNUNET_REST_RequestHandle *con_handle,
+              const char*url,
+              void *cls)
+{
+  struct MHD_Response *resp;
+  struct RequestHandle *handle = cls;
+
+  resp = GNUNET_REST_create_response (NULL);
+  GNUNET_assert (MHD_NO != MHD_add_response_header (resp,
+                                                    "Access-Control-Allow-Methods",
+                                                    MHD_HTTP_METHOD_GET));
+  handle->proc (handle->proc_cls,
+                resp,
+                MHD_HTTP_OK);
+  cleanup_handle (handle);
+}
+
+
+/**
+ * Function processing the REST call
+ *
+ * @param method HTTP method
+ * @param url URL of the HTTP request
+ * @param data body of the HTTP request (optional)
+ * @param data_size length of the body
+ * @param proc callback function for the result
+ * @param proc_cls closure for @a proc
+ * @return #GNUNET_OK if request accepted
+ */
+enum GNUNET_GenericReturnValue
+REST_copying_process_request (void *plugin,
+                              struct GNUNET_REST_RequestHandle *conndata_handle,
+                              GNUNET_REST_ResultProcessor proc,
+                              void *proc_cls)
+{
+  static const struct GNUNET_REST_RequestHandler handlers[] = {
+    { MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_COPYING, &get_cont },
+    { MHD_HTTP_METHOD_OPTIONS, GNUNET_REST_API_NS_COPYING, &options_cont },
+    GNUNET_REST_HANDLER_END
+  };
+  struct RequestHandle *handle = GNUNET_new (struct RequestHandle);
+  struct GNUNET_REST_RequestHandlerError err;
+
+  handle->proc_cls = proc_cls;
+  handle->proc = proc;
+  handle->rest_handle = conndata_handle;
+  GNUNET_CONTAINER_DLL_insert (requests_head,
+                               requests_tail,
+                               handle);
+  return GNUNET_REST_handle_request (conndata_handle,
+                                     handlers,
+                                     &err,
+                                     handle);
+}
+
+
+/**
+ * Entry point for the plugin.
+ *
+ * @param cls the "struct GNUNET_NAMESTORE_PluginEnvironment*"
+ * @return NULL on error, otherwise the plugin context
+ */
+void*
+REST_copying_init (const struct GNUNET_CONFIGURATION_Handle *c)
+{
+  static struct Plugin plugin;
+
+  struct GNUNET_REST_Plugin *api;
+
+  if (NULL != plugin.cfg)
+    return NULL;                /* can only initialize once! */
+  memset (&plugin, 0, sizeof(struct Plugin));
+  plugin.cfg = c;
+  api = GNUNET_new (struct GNUNET_REST_Plugin);
+  api->cls = &plugin;
+  api->name = GNUNET_REST_API_NS_COPYING;
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              _ ("COPYING REST API initialized\n"));
+  return api;
+}
+
+
+/**
+ * Exit point from the plugin.
+ *
+ * @param cls the plugin context (as returned by "init")
+ * @return always NULL
+ */
+void
+REST_copying_done (struct GNUNET_REST_Plugin *api)
+{
+  struct Plugin *plugin = api->cls;
+
+  while (NULL != requests_head)
+    cleanup_handle (requests_head);
+  plugin->cfg = NULL;
+  GNUNET_free (api);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "COPYING REST plugin is finished\n");
+}
+
+
+/* end of plugin_rest_copying.c */