cloud_print/service/service_state.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cloud_print/service/service_state.h"
   6
   7 #include "base/json/json_reader.h"
   8 #include "base/json/json_writer.h"
   9 #include "base/logging.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "base/strings/string_util.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "net/base/escape.h"
  14 #include "net/base/io_buffer.h"
  15 #include "net/base/load_flags.h"
  16 #include "net/base/request_priority.h"
  17 #include "net/base/upload_bytes_element_reader.h"
  18 #include "net/base/upload_data_stream.h"
  19 #include "net/url_request/url_request.h"
  20 #include "net/url_request/url_request_context.h"
  21 #include "net/url_request/url_request_context_builder.h"
  22
  23 namespace {
  24
  25 const char kCloudPrintJsonName[] = "cloud_print";
  26 const char kEnabledOptionName[] = "enabled";
  27
  28 const char kEmailOptionName[] = "email";
  29 const char kProxyIdOptionName[] = "proxy_id";
  30 const char kRobotEmailOptionName[] = "robot_email";
  31 const char kRobotTokenOptionName[] = "robot_refresh_token";
  32 const char kAuthTokenOptionName[] = "auth_token";
  33 const char kXmppAuthTokenOptionName[] = "xmpp_auth_token";
  34
  35 const char kClientLoginUrl[] = "https://www.google.com/accounts/ClientLogin";
  36
  37 const int64 kRequestTimeoutMs = 10 * 1000;
  38
  39 class ServiceStateURLRequestDelegate : public net::URLRequest::Delegate {
  40  public:
  41   virtual void OnResponseStarted(net::URLRequest* request) OVERRIDE {
  42     if (request->GetResponseCode() == 200) {
  43       Read(request);
  44       if (request->status().is_io_pending())
  45         return;
  46     }
  47     request->Cancel();
  48   }
  49
  50   virtual void OnReadCompleted(net::URLRequest* request,
  51                                int bytes_read) OVERRIDE {
  52     Read(request);
  53     if (!request->status().is_io_pending())
  54       base::MessageLoop::current()->Quit();
  55   }
  56
  57   const std::string& data() const {
  58     return data_;
  59   }
  60
  61  private:
  62   void Read(net::URLRequest* request) {
  63     // Read as many bytes as are available synchronously.
  64     const int kBufSize = 100000;
  65     scoped_refptr<net::IOBuffer> buf(new net::IOBuffer(kBufSize));
  66     int num_bytes = 0;
  67     while (request->Read(buf.get(), kBufSize, &num_bytes)) {
  68       data_.append(buf->data(), buf->data() + num_bytes);
  69     }
  70   }
  71   std::string data_;
  72 };
  73
  74
  75 void SetNotEmptyJsonString(base::DictionaryValue* dictionary,
  76                            const std::string& name,
  77                            const std::string& value) {
  78   if (!value.empty())
  79     dictionary->SetString(name, value);
  80 }
  81
  82 }  // namespace
  83
  84 ServiceState::ServiceState() {
  85   Reset();
  86 }
  87
  88 ServiceState::~ServiceState() {
  89 }
  90
  91 void ServiceState::Reset() {
  92   email_.clear();
  93   proxy_id_.clear();
  94   robot_email_.clear();
  95   robot_token_.clear();
  96   auth_token_.clear();
  97   xmpp_auth_token_.clear();
  98 }
  99
 100 bool ServiceState::FromString(const std::string& json) {
 101   Reset();
 102   scoped_ptr<base::Value> data(base::JSONReader::Read(json));
 103   if (!data.get())
 104     return false;
 105
 106   const base::DictionaryValue* services = NULL;
 107   if (!data->GetAsDictionary(&services))
 108     return false;
 109
 110   const base::DictionaryValue* cloud_print = NULL;
 111   if (!services->GetDictionary(kCloudPrintJsonName, &cloud_print))
 112     return false;
 113
 114   bool valid_file = true;
 115   // Don't exit on fail. Collect all data for re-use by user later.
 116   if (!cloud_print->GetBoolean(kEnabledOptionName, &valid_file))
 117     valid_file = false;
 118
 119   cloud_print->GetString(kEmailOptionName, &email_);
 120   cloud_print->GetString(kProxyIdOptionName, &proxy_id_);
 121   cloud_print->GetString(kRobotEmailOptionName, &robot_email_);
 122   cloud_print->GetString(kRobotTokenOptionName, &robot_token_);
 123   cloud_print->GetString(kAuthTokenOptionName, &auth_token_);
 124   cloud_print->GetString(kXmppAuthTokenOptionName, &xmpp_auth_token_);
 125
 126   return valid_file && IsValid();
 127 }
 128
 129 bool ServiceState::IsValid() const {
 130   if (email_.empty() || proxy_id_.empty())
 131     return false;
 132   bool valid_robot = !robot_email_.empty() && !robot_token_.empty();
 133   bool valid_auth = !auth_token_.empty() && !xmpp_auth_token_.empty();
 134   return valid_robot || valid_auth;
 135 }
 136
 137 std::string ServiceState::ToString() {
 138   scoped_ptr<base::DictionaryValue> services(new base::DictionaryValue());
 139
 140   scoped_ptr<base::DictionaryValue> cloud_print(new base::DictionaryValue());
 141   cloud_print->SetBoolean(kEnabledOptionName, true);
 142
 143   SetNotEmptyJsonString(cloud_print.get(), kEmailOptionName, email_);
 144   SetNotEmptyJsonString(cloud_print.get(), kProxyIdOptionName, proxy_id_);
 145   SetNotEmptyJsonString(cloud_print.get(), kRobotEmailOptionName, robot_email_);
 146   SetNotEmptyJsonString(cloud_print.get(), kRobotTokenOptionName, robot_token_);
 147   SetNotEmptyJsonString(cloud_print.get(), kAuthTokenOptionName, auth_token_);
 148   SetNotEmptyJsonString(cloud_print.get(), kXmppAuthTokenOptionName,
 149                         xmpp_auth_token_);
 150
 151   services->Set(kCloudPrintJsonName, cloud_print.release());
 152
 153   std::string json;
 154   base::JSONWriter::WriteWithOptions(services.get(),
 155                                      base::JSONWriter::OPTIONS_PRETTY_PRINT,
 156                                      &json);
 157   return json;
 158 }
 159
 160 std::string ServiceState::LoginToGoogle(const std::string& service,
 161                                         const std::string& email,
 162                                         const std::string& password) {
 163   base::MessageLoopForIO loop;
 164
 165   net::URLRequestContextBuilder builder;
 166   scoped_ptr<net::URLRequestContext> context(builder.Build());
 167
 168   ServiceStateURLRequestDelegate fetcher_delegate;
 169   GURL url(kClientLoginUrl);
 170
 171   std::string post_body;
 172   post_body += "accountType=GOOGLE";
 173   post_body += "&Email=" + net::EscapeUrlEncodedData(email, true);
 174   post_body += "&Passwd=" + net::EscapeUrlEncodedData(password, true);
 175   post_body += "&source=" + net::EscapeUrlEncodedData("CP-Service", true);
 176   post_body += "&service=" + net::EscapeUrlEncodedData(service, true);
 177
 178   scoped_ptr<net::URLRequest> request(context->CreateRequest(
 179       url, net::DEFAULT_PRIORITY, &fetcher_delegate, NULL));
 180   int load_flags = request->load_flags();
 181   load_flags = load_flags | net::LOAD_DO_NOT_SEND_COOKIES;
 182   load_flags = load_flags | net::LOAD_DO_NOT_SAVE_COOKIES;
 183   request->SetLoadFlags(load_flags);
 184
 185   scoped_ptr<net::UploadElementReader> reader(
 186       net::UploadOwnedBytesElementReader::CreateWithString(post_body));
 187   request->set_upload(make_scoped_ptr(
 188       net::UploadDataStream::CreateWithReader(reader.Pass(), 0)));
 189   request->SetExtraRequestHeaderByName(
 190       "Content-Type", "application/x-www-form-urlencoded", true);
 191   request->set_method("POST");
 192   request->Start();
 193
 194   base::MessageLoop::current()->PostDelayedTask(
 195       FROM_HERE,
 196       base::MessageLoop::QuitClosure(),
 197       base::TimeDelta::FromMilliseconds(kRequestTimeoutMs));
 198
 199   base::MessageLoop::current()->Run();
 200
 201   const char kAuthStart[] = "Auth=";
 202   std::vector<std::string> lines;
 203   Tokenize(fetcher_delegate.data(), "\r\n", &lines);
 204   for (size_t i = 0; i < lines.size(); ++i) {
 205     if (StartsWithASCII(lines[i], kAuthStart, false))
 206       return lines[i].substr(arraysize(kAuthStart) - 1);
 207   }
 208
 209   return std::string();
 210 }
 211
 212 bool ServiceState::Configure(const std::string& email,
 213                              const std::string& password,
 214                              const std::string& proxy_id) {
 215   robot_token_.clear();
 216   robot_email_.clear();
 217   email_ = email;
 218   proxy_id_ = proxy_id;
 219   auth_token_ = LoginToGoogle("cloudprint", email_, password);
 220   xmpp_auth_token_ = LoginToGoogle("chromiumsync", email_, password);
 221   return IsValid();
 222 }