Support getting and deleting token for Instance ID.

google_apis/gcm/engine/gcm_unregistration_request.cc

+// Copyright 2015 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 "google_apis/gcm/engine/gcm_unregistration_request.h"
+
+#include "google_apis/gcm/base/gcm_util.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace gcm {
+
+namespace {
+
+// Request constants.
+const char kUnregistrationCallerKey[] = "gcm_unreg_caller";
+// We are going to set the value to "false" in order to forcefully unregister
+// the application.
+const char kUnregistrationCallerValue[] = "false";
+
+// Response constants.
+const char kDeletedPrefix[] = "deleted=";
+const char kErrorPrefix[] = "Error=";
+const char kInvalidParameters[] = "INVALID_PARAMETERS";
+
+}  // namespace
+
+GCMUnregistrationRequest::GCMUnregistrationRequest(
+    const GURL& registration_url,
+    const RequestInfo& request_info,
+    const net::BackoffEntry::Policy& backoff_policy,
+    const UnregistrationCallback& callback,
+    scoped_refptr<net::URLRequestContextGetter> request_context_getter,
+    GCMStatsRecorder* recorder)
+    : UnregistrationRequest(registration_url,
+                            request_info,
+                            backoff_policy,
+                            callback,
+                            request_context_getter,
+                            recorder) {
+}
+
+GCMUnregistrationRequest::~GCMUnregistrationRequest() {}
+
+void GCMUnregistrationRequest::BuildRequestBody(std::string* body){
+  UnregistrationRequest::BuildRequestBody(body);
+
+  BuildFormEncoding(kUnregistrationCallerKey, kUnregistrationCallerValue, body);
+}
+
+bool GCMUnregistrationRequest::ParseResponse(
+    const net::URLFetcher* source,
+    UnregistrationRequest::Status* status) {
+  if (UnregistrationRequest::ParseResponse(source, status))
+    return true;
+
+  std::string response;
+  if (!source->GetResponseAsString(&response)) {
+    DVLOG(1) << "Failed to get response body.";
+    *status = NO_RESPONSE_BODY;
+    return true;
+  }
+
+  DVLOG(1) << "Parsing unregistration response.";
+  if (response.find(kDeletedPrefix) != std::string::npos) {
+    std::string deleted_app_id = response.substr(
+        response.find(kDeletedPrefix) + arraysize(kDeletedPrefix) - 1);
+    *status = deleted_app_id == app_id() ? SUCCESS : INCORRECT_APP_ID;
+    return true;
+  }
+
+  if (response.find(kErrorPrefix) != std::string::npos) {
+    std::string error = response.substr(
+        response.find(kErrorPrefix) + arraysize(kErrorPrefix) - 1);
+    *status = error == kInvalidParameters? INVALID_PARAMETERS : UNKNOWN_ERROR;
+    return true;
+  }
+
+  DVLOG(1) << "Not able to parse a meaningful output from response body."
+           << response;
+  *status = RESPONSE_PARSING_FAILED;
+  return true;
+}
+
+}  // namespace gcm