[NaCl SDK] Expose Google Drive to nacl_io.

native_client_sdk/src/libraries/nacl_io/googledrivefs/googledrivefs_util.h

+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef LIBRARIES_NACL_IO_GOOGLEDRIVEFS_UTIL_H_
+#define LIBRARIES_NACL_IO_GOOGLEDRIVEFS_UTIL_H_
+
+#include <stdlib.h>
+
+#include "nacl_io/error.h"
+#include "nacl_io/filesystem.h"
+#include "nacl_io/path.h"
+#include "nacl_io/pepper_interface.h"
+
+namespace nacl_io {
+
+struct RequestUrlParams {
+  std::string url;
+  std::string method;
+  std::string headers;
+  std::string body;
+};
+
+void AddUrlPath(const std::string& path, std::string* out_url);
+void AddUrlQAttributeValue(std::string* array,
+                           int size,
+                           std::string* out_q_attribute_value);
+void AddUrlFirstQueryParameter(const std::string& attribute,
+                               const std::string& value,
+                               std::string* out_url);
+void AddUrlNextQueryParameter(const std::string& attribute,
+                              const std::string& value,
+                              std::string* out_url);
+void AddHeaders(const std::string& header_field_key,
+                const std::string& header_field_value,
+                std::string* out_headers);
+void AddBody(const std::string& data, std::string* out_body);
+Error FinishPreparingResponse(PepperInterface* ppapi,
+                              PP_Resource url_loader_object,
+                              PP_Resource* out_url_response_info_object);
+Error MakeRequest(PepperInterface* ppapi,
+                  PP_Resource url_loader_object,
+                  PP_Resource url_request_info_object,
+                  const RequestUrlParams& params);
+Error ReadResponseBody(PepperInterface* ppapi,
+                       PP_Instance instance,
+                       PP_Resource url_response_info_object,
+                       int32_t bytes_to_read,
+                       std::string* out_output);
+int32_t ReadStatusCode(PepperInterface* ppapi,
+                       PP_Resource url_response_info_object);
+void GetValue(const std::string& json,
+              const std::string& key,
+              int find_pos,
+              std::string* out_value,
+              int* out_value_char_pos);
+Error RequestDirId(const std::string& parent_dir_id,
+                   const std::string& dir_name,
+                   Filesystem* filesystem,
+                   std::string* out_dir_id);
+Error RequestItemId(const std::string& parent_dir_id,
+                    const std::string& item_name,
+                    Filesystem* filesystem,
+                    std::string* out_item_id);
+Error RequestParentDirId(const Path& path,
+                         Filesystem* filesystem,
+                         std::string* out_parent_dir_id);
+Error GetListFileResponseBody(const std::string& url,
+                              Filesystem* filesystem,
+                              std::string* out_response_body);
+
+}  // namespace nacl_io
+
+#endif  // LIBRARIES_NACL_IO_GOOGLEDRIVEFS_UTIL_H_