[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 {
+
+#define NACL_ARRAY_SIZE_UNSAFE(arr) ((sizeof arr) / sizeof arr[0])
+
+static const char FOLDER_MIME_TYPE[] = "application/vnd.google-apps.folder";
+
+static const char DRIVE_URL[] = "https://www.googleapis.com/drive/v3/files";
+static const char UPLOAD_DRIVE_URL[] =
+    "https://www.googleapis.com/upload/drive/v3/files";
+static const char DOWNLOAD_DRIVE_URL[] =
+    "https://www.googleapis.com/download/drive/v3/files";
+
+struct RequestUrlParams {
+  std::string url;
+  std::string method;
+  std::string headers;
+  std::string body;
+};
+
+std::string ParentEqualClause(const std::string& parent_dir_id);
+std::string NameEqualClause(const std::string& name);
+
+int ExtractYearFromRFC3339(const std::string& date_time);
+int ExtractMonthFromRFC3339(const std::string& date_time);
+int ExtractDayFromRFC3339(const std::string& date_time);
+int ExtractHourFromRFC3339(const std::string& date_time);
+int ExtractMinuteFromRFC3339(const std::string& date_time);
+int ExtractSecondFromRFC3339(const std::string& date_time);
+
+time_t ConvertDateTimeToEpochTime(int year,
+                                  int month,
+                                  int day,
+                                  int hour,
+                                  int minute,
+                                  int second);
+
+void AddUrlPath(const std::string& path, std::string* out_url);
+void AddUrlQAttributeValue(std::string* array,
+                           size_t 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 LoadUrl(PepperInterface* ppapi,
+              const RequestUrlParams& params,
+              ScopedResource* out_url_response_info_resource);
+Error ReadResponseBody(PepperInterface* ppapi,
+                       PP_Resource url_response_info_object,
+                       uint32_t bytes_to_read,
+                       std::string* out_output);
+int32_t ReadStatusCode(PepperInterface* ppapi,
+                       PP_Resource url_response_info_object);
+Error GetValueStringAndValuePos(const std::string& json,
+                                const std::string& key,
+                                size_t key_search_pos,
+                                std::string* out_value_string,
+                                size_t* out_value_pos);
+Error RequestItemIdAndItemType(const std::string& parent_dir_id,
+                               const std::string& item_name,
+                               Filesystem* filesystem,
+                               std::string* out_item_id,
+                               bool* out_is_dir_type);
+Error RequestParentDirId(const Path& path,
+                         Filesystem* filesystem,
+                         std::string* out_parent_dir_id);
+}  // namespace nacl_io
+
+#endif  // LIBRARIES_NACL_IO_GOOGLEDRIVEFS_UTIL_H_