Moving google_apis and GaiaClient to src/google_apis.

TBR=mechanicalowners@chromium.org
BUG=145584


Review URL: https://chromiumcodereview.appspot.com/10928017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@155312 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 218 insertions, 0 deletions

diff --git a/google_apis/gaia/oauth2_access_token_fetcher.cc b/google_apis/gaia/oauth2_access_token_fetcher.cc
new file mode 100644
index 0000000..679891c
--- /dev/null
+++ b/google_apis/gaia/oauth2_access_token_fetcher.cc
@@ -0,0 +1,218 @@
+// Copyright (c) 2012 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/gaia/oauth2_access_token_fetcher.h"
+
+#include <algorithm>
+#include <string>
+#include <vector>
+
+#include "base/json/json_reader.h"
+#include "base/string_util.h"
+#include "base/stringprintf.h"
+#include "base/time.h"
+#include "base/values.h"
+#include "google_apis/gaia/gaia_urls.h"
+#include "google_apis/gaia/google_service_auth_error.h"
+#include "net/base/escape.h"
+#include "net/base/load_flags.h"
+#include "net/http/http_status_code.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_request_context_getter.h"
+#include "net/url_request/url_request_status.h"
+
+using net::ResponseCookies;
+using net::URLFetcher;
+using net::URLFetcherDelegate;
+using net::URLRequestContextGetter;
+using net::URLRequestStatus;
+
+namespace {
+static const char kGetAccessTokenBodyFormat[] =
+    "client_id=%s&"
+    "client_secret=%s&"
+    "grant_type=refresh_token&"
+    "refresh_token=%s";
+
+static const char kGetAccessTokenBodyWithScopeFormat[] =
+    "client_id=%s&"
+    "client_secret=%s&"
+    "grant_type=refresh_token&"
+    "refresh_token=%s&"
+    "scope=%s";
+
+static const char kAccessTokenKey[] = "access_token";
+static const char kExpiresInKey[] = "expires_in";
+
+static GoogleServiceAuthError CreateAuthError(URLRequestStatus status) {
+  CHECK(!status.is_success());
+  if (status.status() == URLRequestStatus::CANCELED) {
+    return GoogleServiceAuthError(GoogleServiceAuthError::REQUEST_CANCELED);
+  } else {
+    DLOG(WARNING) << "Could not reach Google Accounts servers: errno "
+                  << status.error();
+    return GoogleServiceAuthError::FromConnectionError(status.error());
+  }
+}
+
+static URLFetcher* CreateFetcher(URLRequestContextGetter* getter,
+                                 const GURL& url,
+                                 const std::string& body,
+                                 URLFetcherDelegate* delegate) {
+  bool empty_body = body.empty();
+  URLFetcher* result = net::URLFetcher::Create(
+      0, url,
+      empty_body ? URLFetcher::GET : URLFetcher::POST,
+      delegate);
+
+  result->SetRequestContext(getter);
+  result->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
+                       net::LOAD_DO_NOT_SAVE_COOKIES);
+
+  if (!empty_body)
+    result->SetUploadData("application/x-www-form-urlencoded", body);
+
+  return result;
+}
+}  // namespace
+
+OAuth2AccessTokenFetcher::OAuth2AccessTokenFetcher(
+    OAuth2AccessTokenConsumer* consumer,
+    URLRequestContextGetter* getter)
+    : consumer_(consumer),
+      getter_(getter),
+      state_(INITIAL) { }
+
+OAuth2AccessTokenFetcher::~OAuth2AccessTokenFetcher() { }
+
+void OAuth2AccessTokenFetcher::CancelRequest() {
+  fetcher_.reset();
+}
+
+void OAuth2AccessTokenFetcher::Start(const std::string& client_id,
+                                     const std::string& client_secret,
+                                     const std::string& refresh_token,
+                                     const std::vector<std::string>& scopes) {
+  client_id_ = client_id;
+  client_secret_ = client_secret;
+  refresh_token_ = refresh_token;
+  scopes_ = scopes;
+  StartGetAccessToken();
+}
+
+void OAuth2AccessTokenFetcher::StartGetAccessToken() {
+  CHECK_EQ(INITIAL, state_);
+  state_ = GET_ACCESS_TOKEN_STARTED;
+  fetcher_.reset(CreateFetcher(
+      getter_,
+      MakeGetAccessTokenUrl(),
+      MakeGetAccessTokenBody(
+          client_id_, client_secret_, refresh_token_, scopes_),
+      this));
+  fetcher_->Start();  // OnURLFetchComplete will be called.
+}
+
+void OAuth2AccessTokenFetcher::EndGetAccessToken(
+    const net::URLFetcher* source) {
+  CHECK_EQ(GET_ACCESS_TOKEN_STARTED, state_);
+  state_ = GET_ACCESS_TOKEN_DONE;
+
+  URLRequestStatus status = source->GetStatus();
+  if (!status.is_success()) {
+    OnGetTokenFailure(CreateAuthError(status));
+    return;
+  }
+
+  if (source->GetResponseCode() != net::HTTP_OK) {
+    OnGetTokenFailure(GoogleServiceAuthError(
+        GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS));
+    return;
+  }
+
+  // The request was successfully fetched and it returned OK.
+  // Parse out the access token and the expiration time.
+  std::string access_token;
+  int expires_in;
+  if (!ParseGetAccessTokenResponse(source, &access_token, &expires_in)) {
+    DLOG(WARNING) << "Response doesn't match expected format";
+    OnGetTokenFailure(
+        GoogleServiceAuthError(GoogleServiceAuthError::SERVICE_UNAVAILABLE));
+    return;
+  }
+  // The token will expire in |expires_in| seconds. Take a 10% error margin to
+  // prevent reusing a token too close to its expiration date.
+  OnGetTokenSuccess(
+      access_token,
+      base::Time::Now() + base::TimeDelta::FromSeconds(9 * expires_in / 10));
+}
+
+void OAuth2AccessTokenFetcher::OnGetTokenSuccess(
+    const std::string& access_token,
+    const base::Time& expiration_time) {
+  consumer_->OnGetTokenSuccess(access_token, expiration_time);
+}
+
+void OAuth2AccessTokenFetcher::OnGetTokenFailure(
+    const GoogleServiceAuthError& error) {
+  state_ = ERROR_STATE;
+  consumer_->OnGetTokenFailure(error);
+}
+
+void OAuth2AccessTokenFetcher::OnURLFetchComplete(
+    const net::URLFetcher* source) {
+  CHECK(source);
+  CHECK(state_ == GET_ACCESS_TOKEN_STARTED);
+  EndGetAccessToken(source);
+}
+
+// static
+GURL OAuth2AccessTokenFetcher::MakeGetAccessTokenUrl() {
+  return GURL(GaiaUrls::GetInstance()->oauth2_token_url());
+}
+
+// static
+std::string OAuth2AccessTokenFetcher::MakeGetAccessTokenBody(
+    const std::string& client_id,
+    const std::string& client_secret,
+    const std::string& refresh_token,
+    const std::vector<std::string>& scopes) {
+  std::string enc_client_id = net::EscapeUrlEncodedData(client_id, true);
+  std::string enc_client_secret =
+      net::EscapeUrlEncodedData(client_secret, true);
+  std::string enc_refresh_token =
+      net::EscapeUrlEncodedData(refresh_token, true);
+  if (scopes.empty()) {
+    return StringPrintf(
+        kGetAccessTokenBodyFormat,
+        enc_client_id.c_str(),
+        enc_client_secret.c_str(),
+        enc_refresh_token.c_str());
+  } else {
+    std::string scopes_string = JoinString(scopes, ' ');
+    return StringPrintf(
+        kGetAccessTokenBodyWithScopeFormat,
+        enc_client_id.c_str(),
+        enc_client_secret.c_str(),
+        enc_refresh_token.c_str(),
+        net::EscapeUrlEncodedData(scopes_string, true).c_str());
+  }
+}
+
+// static
+bool OAuth2AccessTokenFetcher::ParseGetAccessTokenResponse(
+    const net::URLFetcher* source,
+    std::string* access_token,
+    int* expires_in) {
+  CHECK(source);
+  CHECK(access_token);
+  std::string data;
+  source->GetResponseAsString(&data);
+  scoped_ptr<base::Value> value(base::JSONReader::Read(data));
+  if (!value.get() || value->GetType() != base::Value::TYPE_DICTIONARY)
+    return false;
+
+  DictionaryValue* dict = static_cast<DictionaryValue*>(value.get());
+  return dict->GetString(kAccessTokenKey, access_token) &&
+      dict->GetInteger(kExpiresInKey, expires_in);
+}