[NaCl SDK] Expose Google Drive to nacl_io.

native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_pepper_interface_googledrivefs.cc

Index: native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_pepper_interface_googledrivefs.cc
diff --git a/native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_pepper_interface_googledrivefs.cc b/native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_pepper_interface_googledrivefs.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b9e095b64f84203f359696f1dc1dab47232654aa
--- /dev/null
+++ b/native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_pepper_interface_googledrivefs.cc
@@ -0,0 +1,1032 @@
+// Copyright 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.
+
+#include "fake_ppapi/fake_pepper_interface_googledrivefs.h"
+
+#include <algorithm>
+
+#include <ppapi/c/pp_completion_callback.h>
+#include <ppapi/c/pp_errors.h>
+
+#include "gtest/gtest.h"
+
+#include "nacl_io/osinttypes.h"
+
+#include "fake_ppapi/fake_core_interface.h"
+#include "fake_ppapi/fake_file_io_interface.h"
+#include "fake_ppapi/fake_pepper_interface_url_loader.h"
+#include "fake_ppapi/fake_util.h"
+#include "fake_ppapi/fake_var_interface.h"
+
+class FakeGoogleDriveInstanceResource : public FakeResource {
+ public:
+  FakeGoogleDriveInstanceResource() : server_template(NULL) {}
+  static const char* classname() { return "FakeGoogleDriveInstanceResource"; }
+
+  FakeGoogleDriveServer* server_template;
+};
+
+class FakeGoogleDriveURLLoaderResource : public FakeResource {
+ public:
+  FakeGoogleDriveURLLoaderResource() : server(NULL), response_pp_resource(0) {}
+
+  virtual void Destroy() {
+    EXPECT_TRUE(manager != NULL);
+    if (response_pp_resource != 0) {
+      manager->Release(response_pp_resource);
+    }
+  }
+
+  static const char* classname() { return "FakeGoogleDriveURLLoaderResource"; }
+
+  FakeResourceManager* manager;
+  FakeGoogleDriveServer* server;
+  PP_Resource response_pp_resource;
+  std::string response_body;
+};
+
+FakeGoogleDriveServer::FakeGoogleDriveServer() : token_id_(0), item_id_(0) {
+  FakeGoogleDriveItem item("root", "root_directory", "",
+                           "2016-07-24T08:21:28.940Z", "no_parent_dir_id",
+                           true);
+  item_map_["root"] = item;
+  vector_of_items_map_["root"] = std::vector<FakeGoogleDriveItem*>();
+}
+
+void FakeGoogleDriveServer::AddBody(const std::string& data,
+                                    std::string* out_body) {
+  *out_body += data;
+  *out_body += "\n";
+}
+
+int32_t FakeGoogleDriveServer::PauseValueStringFromUrlQuery(
+    const std::string& url,
+    const std::string& key,
+    std::string* out_value_string) {
+  out_value_string->clear();
+
+  // Get filed from a url in the following format:
+  // https://../drive/v3/files/..?<key>=<value>
+  // https://../drive/v3/files/..?<key>=<value>&..
+  // https://../drive/v3/files/..?..&<key>=<value>
+
+  std::string s_key_equal = key + "=";
+  int start_key_index = url.find(s_key_equal, 0);
+  if (start_key_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  start_key_index += s_key_equal.size();
+
+  int end_key_index = url.find("&", start_key_index);
+  if (end_key_index == std::string::npos) {
+    end_key_index = url.size();
+  }
+
+  *out_value_string =
+      url.substr(start_key_index, end_key_index - start_key_index);
+
+  return PP_OK;
+}
+
+int32_t FakeGoogleDriveServer::PauseIdFromUrlPath(const std::string& url,
+                                                  std::string* out_id) {
+  out_id->clear();
+
+  // Get id from a url in the following format:
+  // https://../drive/v3/files/<id>?..
+
+  int end_id_index = url.find("?", 0);
+  if (end_id_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  const char* s_slash = "/";
+  int start_id_index = url.rfind(s_slash, end_id_index);
+  if (start_id_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+  start_id_index += strlen(s_slash);
+
+  *out_id = url.substr(start_id_index, end_id_index - start_id_index);
+
+  return PP_OK;
+}
+
+int32_t FakeGoogleDriveServer::PauseParentDirIdFromUrlQuery(
+    const std::string& url,
+    std::string* out_parent_dir_id) {
+  out_parent_dir_id->clear();
+
+  // Get id from the following url format:
+  // https://../drive/v3/files?q=%27<id>%27+in+parents
+
+  int end_id_index = url.find("%27+in+parents", 0);
+  if (end_id_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  const char* s_quote = "%27";
+  int start_id_index = url.rfind(s_quote, end_id_index - 1);
+  if (start_id_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  start_id_index += strlen(s_quote);
+
+  *out_parent_dir_id =
+      url.substr(start_id_index, end_id_index - start_id_index);
+
+  return PP_OK;
+}
+
+int32_t FakeGoogleDriveServer::PauseNameFromUrlQuery(const std::string& url,
+                                                     std::string* out_name) {
+  out_name->clear();
+
+  // Get name from the following url format:
+  // https://../drive/v3/files?q=..name+=+%27<name>%27..
+
+  const char* s_name_equal_quote = "name+=+%27";
+  int start_name_index = url.find(s_name_equal_quote, 0);
+  if (start_name_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  start_name_index += strlen(s_name_equal_quote);
+
+  int end_name_index = url.find("%27", start_name_index);
+  if (end_name_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  *out_name = url.substr(start_name_index, end_name_index - start_name_index);
+
+  return PP_OK;
+}
+
+int32_t FakeGoogleDriveServer::PauseNameFromBody(const std::string& body,
+                                                 std::string* out_name) {
+  out_name->clear();
+
+  // Get name from the following body format:
+  // {
+  //   ..
+  //   "name": "<name>",
+  //   ..
+  // }
+
+  const char* s_name_quote_colon_quote = "name\": \"";
+  int start_name_index = body.find(s_name_quote_colon_quote, 0);
+  if (start_name_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  start_name_index += strlen(s_name_quote_colon_quote);
+
+  int end_name_index = body.find("\"", start_name_index);
+  if (end_name_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  *out_name = body.substr(start_name_index, end_name_index - start_name_index);
+
+  return PP_OK;
+}
+
+int32_t FakeGoogleDriveServer::PauseParentDirIdFromBody(
+    const std::string& body,
+    std::string* out_parent_dir_id) {
+  out_parent_dir_id->clear();
+
+  // Get id from the following body format:
+  // {
+  //   ..
+  //   "parents": [
+  //     "<id>"
+  //   ]
+  //   ..
+  // }
+
+  const char* s_parents_quote = "parents\"";
+
+  int end_parent_key_index = body.find(s_parents_quote, 0);
+  if (end_parent_key_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+  end_parent_key_index += strlen(s_parents_quote);
+
+  const char* s_quote = "\"";
+  int start_parent_dir_id_index = body.find(s_quote, end_parent_key_index);
+  if (start_parent_dir_id_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+  start_parent_dir_id_index += strlen(s_quote);
+
+  int end_parent_dir_id_index = body.find(s_quote, start_parent_dir_id_index);
+  if (end_parent_dir_id_index == std::string::npos) {
+    return PP_ERROR_FAILED;
+  }
+
+  *out_parent_dir_id =
+      body.substr(start_parent_dir_id_index,
+                  end_parent_dir_id_index - start_parent_dir_id_index);
+
+  return PP_OK;
+}
+
+void FakeGoogleDriveServer::MakeDriveFileListResponse(
+    const std::vector<FakeGoogleDriveItem*>& dirents,
+    size_t start_index,
+    size_t end_index,
+    const std::string& optional_next_page_token,
+    std::string* out_body) {
+  AddBody("{", out_body);
+
+  if (start_index == end_index) {
+    AddBody("  \"files\": [],", out_body);
+  } else {
+    if (!optional_next_page_token.empty()) {
+      AddBody("  \"nextPageToken\": \"" + optional_next_page_token + "\",",
+              out_body);
+    }
+
+    AddBody("  \"files\": [", out_body);
+
+    for (size_t i = start_index; i < end_index; ++i) {
+      AddBody("     {", out_body);
+
+      std::string mime_type = (dirents[i]->is_dir())
+                                  ? folder_mime_type()
+                                  : "file mime type";
+      AddBody("       \"mimeType\": \"" + mime_type + "\",", out_body);
+
+      AddBody("       \"kind\": \"drive#file\",", out_body);
+      AddBody("       \"id\": \"" + dirents[i]->id() + "\",", out_body);
+      AddBody("       \"name\": \"" + dirents[i]->name() + "\"", out_body);
+
+      std::string closing_bracket = (i == end_index - 1) ? "     }" : "     },";
+      AddBody(closing_bracket, out_body);
+    }
+
+    AddBody("  ],", out_body);
+  }
+
+  AddBody("  \"kind\": \"drive#fileList\"", out_body);
+  AddBody("}", out_body);
+}
+
+int32_t FakeGoogleDriveServer::GetItemField(const FakeGoogleDriveItem& item,
+                                            const std::string& field,
+                                            std::string* out_value) {
+  out_value->clear();
+
+  if (field == "modifiedTime") {
+    *out_value = item.modified_time();
+
+    return PP_OK;
+  } else if (field == "size") {
+    char buffer[33];
+    int char_written =
+        snprintf(buffer, sizeof(buffer), "%u", item.contents().size());
+    if (char_written < 0 || char_written >= (signed int)sizeof(buffer)) {
+      return PP_ERROR_FAILED;
+    }
+    *out_value = buffer;
+
+    return PP_OK;
+  }
+
+  return PP_ERROR_FAILED;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondItemFieldValue(
+    const std::string url) {
+  // url string:
+  // https://www.googleapis.com/drive/v3/files/<itemid>?fields=<field>
+
+  FakeGoogleDriveServerResponse response;
+
+  std::string id;
+  int32_t result = PauseIdFromUrlPath(url, &id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  if (item_map_.find(id) == item_map_.end()) {
+    response.status_code = STATUSCODE_NOT_FOUND;
+
+    return response;
+  }
+
+  std::string field;
+  result = PauseValueStringFromUrlQuery(url, "fields", &field);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  std::string field_value;
+  result = GetItemField(item_map_[id], field, &field_value);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  response.status_code = STATUSCODE_OK;
+
+  AddBody("{", &response.body);
+  AddBody("  \"" + field + "\": \"" + field_value + "\"", &response.body);
+  AddBody("}", &response.body);
+
+  return response;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondItemId(
+    const std::string& url) {
+  // url string:
+  // https://www.googleapis.com/drive/v3/files
+  // ?q=%27<itemid>%27+in+parents+and+name+=+%27<name>%27
+
+  FakeGoogleDriveServerResponse response;
+
+  std::string parent_dir_id;
+  int32_t result = PauseParentDirIdFromUrlQuery(url, &parent_dir_id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  if (vector_of_items_map_.find(parent_dir_id) == vector_of_items_map_.end()) {
+    response.status_code = STATUSCODE_NOT_FOUND;
+
+    return response;
+  }
+
+  std::string name;
+  result = PauseNameFromUrlQuery(url, &name);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  for (size_t i = 0; i < vector_of_items_map_[parent_dir_id].size(); ++i) {
+    if (vector_of_items_map_[parent_dir_id][i]->name() == name) {
+      response.status_code = STATUSCODE_OK;
+
+      MakeDriveFileListResponse(vector_of_items_map_[parent_dir_id], i, i + 1,
+                                "", &response.body);
+
+      return response;
+    }
+  }
+
+  response.status_code = STATUSCODE_OK;
+
+  MakeDriveFileListResponse(vector_of_items_map_[parent_dir_id], 0, 0, "",
+                            &response.body);
+
+  return response;
+}
+
+int32_t FakeGoogleDriveServer::GenerateItemId(std::string* out_item_id) {
+  out_item_id->clear();
+
+  char buffer[33];
+  int char_written = snprintf(buffer, sizeof(buffer), "%i", item_id_);
+
+  if (char_written < 0 || char_written >= (signed int)sizeof(buffer)) {
+    return PP_ERROR_FAILED;
+  }
+  *out_item_id = buffer;
+
+  item_id_++;
+
+  return PP_OK;
+}
+
+int32_t FakeGoogleDriveServer::ProduceNextPageToken(
+    const std::string& parent_dir_id,
+    size_t cur_index,
+    std::string* out_next_page_token) {
+  out_next_page_token->clear();
+
+  char buffer[33];
+  int char_written = snprintf(buffer, sizeof(buffer), "%i", token_id_);
+
+  if (char_written < 0 || char_written >= (signed int)sizeof(buffer)) {
+    return PP_ERROR_FAILED;
+  }
+  *out_next_page_token = buffer;
+  token_id_++;
+
+  dirent_map_[*out_next_page_token] =
+      FakeGoogleDriveDirent(parent_dir_id, cur_index + files_per_page());
+
+  return PP_OK;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondDirent(
+    const std::string& url) {
+  // url string:
+  // https://www.googleapis.com/drive/v3/files
+  // ?q=%27<itemid>%27+in+parents
+  FakeGoogleDriveServerResponse response;
+
+  std::string parent_dir_id;
+  int32_t result = PauseParentDirIdFromUrlQuery(url, &parent_dir_id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  if (vector_of_items_map_.find(parent_dir_id) == vector_of_items_map_.end()) {
+    response.status_code = STATUSCODE_NOT_FOUND;
+
+    return response;
+  }
+
+  if (vector_of_items_map_[parent_dir_id].size() == 0) {
+    response.status_code = STATUSCODE_OK;
+
+    MakeDriveFileListResponse(vector_of_items_map_[parent_dir_id], 0, 0, "",
+                              &response.body);
+
+    return response;
+  }
+
+  response.status_code = STATUSCODE_OK;
+
+  std::string next_page_token;
+  if (vector_of_items_map_[parent_dir_id].size() > files_per_page()) {
+    result = ProduceNextPageToken(parent_dir_id, 0, &next_page_token);
+    if (result != PP_OK) {
+      response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+      return response;
+    }
+  }
+
+  MakeDriveFileListResponse(
+      vector_of_items_map_[parent_dir_id], 0,
+      std::min(files_per_page(), vector_of_items_map_[parent_dir_id].size()),
+      next_page_token, &response.body);
+
+  return response;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondDirentNextPage(
+    const std::string& url) {
+  // url string:
+  // https://www.googleapis.com/drive/v3/files?pageToken=<pagetoken>&q=%27<id>%27+in+parents
+
+  FakeGoogleDriveServerResponse response;
+
+  std::string parent_dir_id;
+  int32_t result = PauseParentDirIdFromUrlQuery(url, &parent_dir_id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+  std::string page_token;
+  result = PauseValueStringFromUrlQuery(url, "pageToken", &page_token);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  FakeGoogleDriveDirent entry = dirent_map_[page_token];
+
+  if (entry.parent_dir_id() != parent_dir_id) {
+    // When <id> in <id>+in+parents is not equal to the id of the
+    // parent directory that the page token is related to, Google
+    // Drive API v3 returns a status code 200 but a list of files
+    // that does not make sense. Return the status code 500 for
+    // the error of returning a list of files that does not make
+    // sense.
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  response.status_code = STATUSCODE_OK;
+
+  std::string next_page_token;
+  if (vector_of_items_map_[parent_dir_id].size() >
+      entry.index() + files_per_page()) {
+    result =
+        ProduceNextPageToken(parent_dir_id, entry.index(), &next_page_token);
+    if (result != PP_OK) {
+      response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+      return response;
+    }
+  }
+
+  MakeDriveFileListResponse(
+      vector_of_items_map_[parent_dir_id], entry.index(),
+      std::min(entry.index() + files_per_page(),
+               vector_of_items_map_[parent_dir_id].size()),
+      next_page_token, &response.body);
+
+  return response;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondFileWriteRequest(
+    const std::string& url,
+    const std::string& body) {
+  // url string:
+  // https://www.googleapis.com/upload/drive/v3/files/<itemid>?uploadType=media
+
+  FakeGoogleDriveServerResponse response;
+
+  std::string id;
+  int32_t result = PauseIdFromUrlPath(url, &id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  if (item_map_.find(id) == item_map_.end()) {
+    response.status_code = STATUSCODE_NOT_FOUND;
+
+    return response;
+  }
+
+  response.status_code = STATUSCODE_OK;
+
+  item_map_[id].set_contents(body);
+
+  return response;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondFileCreationRequest(
+    const std::string& url,
+    const std::string& body) {
+  // url string:
+  // https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart
+
+  // body string:
+  // --foo_bar_baz
+  // Content-Type: application/json; charset=UTF-8
+  //
+  // {
+  //   "name": "<itemname>",
+  //   "parents": [
+  //     "<parentdirid>"
+  //   ]
+  // }
+  //
+  // --foo_bar_baz
+  // Content-Type: text/plain
+  //
+  //
+  // --foo_bar_baz--
+  FakeGoogleDriveServerResponse response;
+
+  std::string name;
+  int32_t result = PauseNameFromBody(body, &name);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  std::string parent_dir_id;
+  result = PauseParentDirIdFromBody(body, &parent_dir_id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  if (vector_of_items_map_.find(parent_dir_id) == vector_of_items_map_.end()) {
+    response.status_code = STATUSCODE_NOT_FOUND;
+
+    return response;
+  }
+
+  std::string file_id;
+  result = GenerateItemId(&file_id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  response.status_code = STATUSCODE_OK;
+
+  FakeGoogleDriveItem item(file_id, name, "", "2016-07-24T08:21:28.940Z",
+                           parent_dir_id, false);
+
+  item_map_[file_id] = item;
+  vector_of_items_map_[parent_dir_id].push_back(&item_map_[file_id]);
+
+  return response;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondFileReadRequest(
+    const std::string& url,
+    const std::string& headers) {
+  // url string:
+  // https://www.googleapis.com/download/drive/v3/files/<itemid>?alt=media
+  FakeGoogleDriveServerResponse response;
+
+  std::string id;
+  int32_t result = PauseIdFromUrlPath(url, &id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  if (item_map_.find(id) == item_map_.end()) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  std::string range;
+  if (!GetHeaderValue(headers, "Range", &range)) {
+    response.status_code = STATUSCODE_OK;
+
+    response.body = item_map_[id].contents();
+
+    return response;
+  }
+
+  // We don't support all range requests, just bytes=<num>-<num>
+  // Google Drive files have the max size of uint32_t when the files
+  // are written from nacl_io, so lo and hi are in uint32_t.
+  uint32_t lo;
+  uint32_t hi;
+  if (sscanf(range.c_str(), "bytes=%u-%u", &lo, &hi) != 2) {
+    // Couldn't parse the range value.
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  size_t content_length = item_map_[id].contents().size();
+  if (lo >= content_length) {
+    // Trying to start reading past the end of the file contents is
+    // unsatisfiable.
+    response.status_code =
+        STATUSCODE_REQUESTED_RANGE_NOT_SATISFIABLE;  // Request range not
+                                                     // satisfiable.
+
+    return response;
+  }
+
+  // Clamp the hi value to the content length.
+  if (hi >= content_length) {
+    hi = content_length - 1;
+  }
+
+  if (lo > hi) {
+    response.status_code = STATUSCODE_OK;
+
+    response.body = item_map_[id].contents();
+
+    return response;
+  }
+
+  response.status_code = STATUSCODE_PARTIAL_CONTENT;
+
+  response.body = item_map_[id].contents().substr(lo, hi - lo + 1);
+
+  return response;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondRemoveDirRequest(
+    const std::string& url) {
+  // url string:
+  // https://www.googleapis.com/drive/v3/files/<dirid>
+  FakeGoogleDriveServerResponse response;
+
+  int start_id_index = url.rfind("/", url.size() - 1);
+  if (start_id_index == std::string::npos) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  start_id_index += strlen("/");
+  std::string id = url.substr(start_id_index, url.size() - start_id_index);
+
+  VectorOfItemsMap::const_iterator map_iter = vector_of_items_map_.find(id);
+
+  if (map_iter == vector_of_items_map_.end()) {
+    response.status_code = STATUSCODE_NOT_FOUND;
+
+    return response;
+  }
+
+  if (vector_of_items_map_[id].size() > 0) {
+    // Posix rmdir(3) is supposed to remove a directory when the directory is
+    // empty. Return a client error when the client requests to remove a
+    // directory that has items.
+    response.status_code = STATUSCODE_BAD_REQUEST;
+
+    return response;
+  }
+  ItemMap::const_iterator item_map_iter = item_map_.find(id);
+
+  for (std::vector<FakeGoogleDriveItem*>::const_iterator it =
+           vector_of_items_map_[item_map_iter->second.parent_dir_id()].begin();
+       it != vector_of_items_map_[item_map_iter->second.parent_dir_id()].end();
+       ++it) {
+    if ((*it)->id() == id) {
+      vector_of_items_map_[item_map_iter->second.parent_dir_id()].erase(it);
+      break;
+    }
+  }
+
+  vector_of_items_map_.erase(map_iter);
+
+  // id in vector_of_items_map_ also is in item_map_.
+  // Do not check to see if iterator == item_map_.end().
+  item_map_.erase(item_map_.find(id));
+
+  response.status_code = STATUSCODE_NO_CONTENT;
+
+  return response;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::RespondMakeDirRequest(
+    const std::string& url,
+    const std::string& body) {
+  // url string:
+  // https://www.googleapis.com/drive/v3/files
+
+  // body string:
+  // {
+  //   "name": "<dirname>",
+  //   "mimeType": "application/vnd.google-apps.folder"
+  //   "parents": [
+  //     "<parentdirid>"
+  //   ]
+  // }
+  FakeGoogleDriveServerResponse response;
+
+  std::string name;
+  int32_t result = PauseNameFromBody(body, &name);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  std::string parent_dir_id;
+  result = PauseParentDirIdFromBody(body, &parent_dir_id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  if (vector_of_items_map_.find(parent_dir_id) == vector_of_items_map_.end()) {
+    response.status_code = STATUSCODE_UNAUTHORIZED;
+
+    return response;
+  }
+
+  std::string dir_id;
+  result = GenerateItemId(&dir_id);
+  if (result != PP_OK) {
+    response.status_code = STATUSCODE_INTERNAL_SERVER_ERROR;
+
+    return response;
+  }
+
+  response.status_code = STATUSCODE_OK;
+
+  FakeGoogleDriveItem item(dir_id, name, "", "2016-07-24T08:21:28.940Z",
+                           parent_dir_id, true);
+
+  item_map_[dir_id] = item;
+  vector_of_items_map_[dir_id] = std::vector<FakeGoogleDriveItem*>();
+  vector_of_items_map_[parent_dir_id].push_back(&item_map_[dir_id]);
+
+  return response;
+}
+
+FakeGoogleDriveServerResponse FakeGoogleDriveServer::Respond(
+    const std::string& url,
+    const std::string& headers,
+    const std::string& method,
+    const std::string& body) {
+  if (url.find("fields=", 0) != std::string::npos) {
+    return RespondItemFieldValue(url);
+  } else if (url.find("name", 0) != std::string::npos &&
+             url.find("+in+parents", 0) != std::string::npos) {
+    return RespondItemId(url);
+  } else if (url.find("pageToken", 0) != std::string::npos &&
+             url.find("+in+parents", 0) != std::string::npos) {
+    return RespondDirentNextPage(url);
+  } else if (url.find("+in+parents", 0) != std::string::npos) {
+    return RespondDirent(url);
+  } else if (url.find("uploadType=media", 0) != std::string::npos) {
+    return RespondFileWriteRequest(url, body);
+  } else if (url.find("uploadType=multipart", 0) != std::string::npos) {
+    return RespondFileCreationRequest(url, body);
+  } else if (url.find("download/drive", 0) != std::string::npos) {
+    return RespondFileReadRequest(url, headers);
+  } else if (method == "DELETE") {
+    return RespondRemoveDirRequest(url);
+  } else if (body.find("\"name\"", 0) != std::string::npos &&
+             body.find("\"mimeType\": \"" + folder_mime_type() + "\"",
+                       0) != std::string::npos &&
+             body.find("\"parents\"", 0) != std::string::npos) {
+    return RespondMakeDirRequest(url, body);
+  }
+  FakeGoogleDriveServerResponse response;
+
+  response.status_code = STATUSCODE_NOT_IMPLEMENTED;
+
+  return response;
+}
+
+FakeGoogleDriveURLLoaderInterface::FakeGoogleDriveURLLoaderInterface(
+    FakeCoreInterface* core_interface)
+    : FakeURLLoaderInterface(core_interface) {}
+
+PP_Resource FakeGoogleDriveURLLoaderInterface::Create(PP_Instance instance) {
+  FakeGoogleDriveInstanceResource* instance_resource =
+      core_interface_->resource_manager()->Get<FakeGoogleDriveInstanceResource>(
+          instance);
+  if (instance_resource == NULL)
+    return PP_ERROR_BADRESOURCE;
+
+  FakeGoogleDriveURLLoaderResource* loader_resource =
+      new FakeGoogleDriveURLLoaderResource;
+  loader_resource->manager = core_interface_->resource_manager();
+  loader_resource->server = instance_resource->server_template;
+
+  return CREATE_RESOURCE(core_interface_->resource_manager(),
+                         FakeGoogleDriveURLLoaderResource, loader_resource);
+}
+
+int32_t FakeGoogleDriveURLLoaderInterface::Open(
+    PP_Resource loader,
+    PP_Resource request,
+    PP_CompletionCallback callback) {
+  FakeGoogleDriveURLLoaderResource* loader_resource =
+      core_interface_->resource_manager()
+          ->Get<FakeGoogleDriveURLLoaderResource>(loader);
+
+  if (loader_resource == NULL)
+    return PP_ERROR_BADRESOURCE;
+
+  FakeURLRequestInfoResource* request_resource =
+      core_interface_->resource_manager()->Get<FakeURLRequestInfoResource>(
+          request);
+  if (request_resource == NULL)
+    return PP_ERROR_BADRESOURCE;
+
+  // Create a response resource.
+  FakeURLResponseInfoResource* response_resource =
+      new FakeURLResponseInfoResource;
+  loader_resource->response_pp_resource =
+      CREATE_RESOURCE(core_interface_->resource_manager(),
+                      FakeURLResponseInfoResource, response_resource);
+
+  FakeGoogleDriveServerResponse response = loader_resource->server->Respond(
+      request_resource->url, request_resource->headers,
+      request_resource->method, request_resource->body);
+
+  response_resource->status_code = response.status_code;
+  loader_resource->response_body = response.body;
+
+  // Call the callback.
+  return RunCompletionCallback(&callback, PP_OK);
+}
+
+PP_Resource FakeGoogleDriveURLLoaderInterface::GetResponseInfo(
+    PP_Resource loader) {
+  FakeGoogleDriveURLLoaderResource* loader_resource =
+      core_interface_->resource_manager()
+          ->Get<FakeGoogleDriveURLLoaderResource>(loader);
+  if (loader_resource == NULL)
+    return 0;
+
+  // Returned resources have an implicit AddRef.
+  core_interface_->resource_manager()->AddRef(
+      loader_resource->response_pp_resource);
+  return loader_resource->response_pp_resource;
+}
+
+int32_t FakeGoogleDriveURLLoaderInterface::FinishStreamingToFile(
+    PP_Resource loader,
+    PP_CompletionCallback callback) {
+  FakeGoogleDriveURLLoaderResource* loader_resource =
+      core_interface_->resource_manager()
+          ->Get<FakeGoogleDriveURLLoaderResource>(loader);
+  if (loader_resource == NULL)
+    return PP_ERROR_BADRESOURCE;
+
+  FakeURLResponseInfoResource* response_pp_resource =
+      core_interface_->resource_manager()->Get<FakeURLResponseInfoResource>(
+          loader_resource->response_pp_resource);
+  if (response_pp_resource == NULL)
+    return PP_ERROR_BADRESOURCE;
+
+  response_pp_resource->body = loader_resource->response_body;
+
+  return response_pp_resource->body.size();
+}
+
+void FakeGoogleDriveURLLoaderInterface::Close(PP_Resource loader) {
+  FakeGoogleDriveURLLoaderResource* loader_resource =
+      core_interface_->resource_manager()
+          ->Get<FakeGoogleDriveURLLoaderResource>(loader);
+  if (loader_resource == NULL)
+    return;
+
+  core_interface_->resource_manager()->Release(
+      loader_resource->response_pp_resource);
+
+  loader_resource->server = NULL;
+  loader_resource->response_pp_resource = 0;
+}
+
+FakePepperInterfaceGoogleDriveFs::FakePepperInterfaceGoogleDriveFs()
+    : core_interface_(&resource_manager_),
+      var_interface_(&var_manager_),
+      file_io_interface_(&core_interface_),
+      file_ref_interface_(&core_interface_, &var_interface_),
+      google_drive_url_loader_interface_(&core_interface_),
+      url_request_info_interface_(&core_interface_, &var_interface_),
+      url_response_info_interface_(&core_interface_,
+                                   &var_interface_,
+                                   &file_ref_interface_) {
+  Init();
+}
+
+void FakePepperInterfaceGoogleDriveFs::Init() {
+  FakeGoogleDriveInstanceResource* instance_resource =
+      new FakeGoogleDriveInstanceResource;
+  instance_resource->server_template = &google_drive_server_template_;
+
+  instance_ =
+      CREATE_RESOURCE(core_interface_.resource_manager(),
+                      FakeGoogleDriveInstanceResource, instance_resource);
+}
+
+FakePepperInterfaceGoogleDriveFs::~FakePepperInterfaceGoogleDriveFs() {
+  core_interface_.ReleaseResource(instance_);
+}
+
+nacl_io::CoreInterface* FakePepperInterfaceGoogleDriveFs::GetCoreInterface() {
+  return &core_interface_;
+}
+
+nacl_io::FileRefInterface*
+FakePepperInterfaceGoogleDriveFs::GetFileRefInterface() {
+  return &file_ref_interface_;
+}
+
+nacl_io::FileIoInterface*
+FakePepperInterfaceGoogleDriveFs::GetFileIoInterface() {
+  return &file_io_interface_;
+}
+
+nacl_io::URLLoaderInterface*
+FakePepperInterfaceGoogleDriveFs::GetURLLoaderInterface() {
+  return &google_drive_url_loader_interface_;
+}
+
+nacl_io::URLRequestInfoInterface*
+FakePepperInterfaceGoogleDriveFs::GetURLRequestInfoInterface() {
+  return &url_request_info_interface_;
+}
+
+nacl_io::URLResponseInfoInterface*
+FakePepperInterfaceGoogleDriveFs::GetURLResponseInfoInterface() {
+  return &url_response_info_interface_;
+}
+
+nacl_io::VarInterface* FakePepperInterfaceGoogleDriveFs::GetVarInterface() {
+  return &var_interface_;
+}
+
+// static
+size_t FakeGoogleDriveServer::files_per_page() {
+  return 100;
+}
+
+// static
+std::string FakeGoogleDriveServer::folder_mime_type() {
+  return "application/vnd.google-apps.folder";
+}