components/autofill/content/browser/wallet/wallet_client.cc

   1 // Copyright 2013 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 "components/autofill/content/browser/wallet/wallet_client.h"
   6
   7 #include "base/bind.h"
   8 #include "base/json/json_reader.h"
   9 #include "base/json/json_writer.h"
  10 #include "base/logging.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "base/strings/string_util.h"
  15 #include "base/strings/stringprintf.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "components/autofill/content/browser/wallet/form_field_error.h"
  18 #include "components/autofill/content/browser/wallet/instrument.h"
  19 #include "components/autofill/content/browser/wallet/wallet_address.h"
  20 #include "components/autofill/content/browser/wallet/wallet_client_delegate.h"
  21 #include "components/autofill/content/browser/wallet/wallet_items.h"
  22 #include "components/autofill/content/browser/wallet/wallet_service_url.h"
  23 #include "components/autofill/core/browser/autofill_metrics.h"
  24 #include "crypto/random.h"
  25 #include "google_apis/google_api_keys.h"
  26 #include "net/base/escape.h"
  27 #include "net/http/http_status_code.h"
  28 #include "net/url_request/url_fetcher.h"
  29 #include "net/url_request/url_request_context_getter.h"
  30
  31 namespace autofill {
  32 namespace wallet {
  33
  34 namespace {
  35
  36 const char kFormEncodedMimeType[] = "application/x-www-form-urlencoded";
  37 const char kJsonMimeType[] = "application/json";
  38 const char kEscrowNewInstrumentFormat[] =
  39     "request_content_type=application/json&request=%s&cvn=%s&card_number=%s";
  40 const char kEscrowCardVerificationNumberFormat[] =
  41     "request_content_type=application/json&request=%s&cvn=%s";
  42 const char kGetFullWalletRequestFormat[] =
  43     "request_content_type=application/json&request=%s&otp=%s:%s";
  44 const size_t kOneTimePadLength = 6;
  45
  46 // The maximum number of bits in the one time pad that the server is willing to
  47 // accept.
  48 const size_t kMaxBits = 56;
  49
  50 // The minimum number of bits in the one time pad that the server is willing to
  51 // accept.
  52 const size_t kMinBits = 40;
  53
  54 std::string RiskCapabilityToString(
  55     WalletClient::RiskCapability risk_capability) {
  56   switch (risk_capability) {
  57     case WalletClient::RELOGIN:
  58       return "RELOGIN";
  59     case WalletClient::VERIFY_CVC:
  60       return "VERIFY_CVC";
  61   }
  62   NOTREACHED();
  63   return "NOT_POSSIBLE";
  64 }
  65
  66 WalletClient::ErrorType StringToErrorType(const std::string& error_type) {
  67   std::string trimmed;
  68   base::TrimWhitespaceASCII(error_type, base::TRIM_ALL, &trimmed);
  69   if (LowerCaseEqualsASCII(trimmed, "buyer_account_error"))
  70     return WalletClient::BUYER_ACCOUNT_ERROR;
  71   if (LowerCaseEqualsASCII(trimmed, "unsupported_merchant"))
  72     return WalletClient::UNSUPPORTED_MERCHANT;
  73   if (LowerCaseEqualsASCII(trimmed, "internal_error"))
  74     return WalletClient::INTERNAL_ERROR;
  75   if (LowerCaseEqualsASCII(trimmed, "invalid_params"))
  76     return WalletClient::INVALID_PARAMS;
  77   if (LowerCaseEqualsASCII(trimmed, "service_unavailable"))
  78     return WalletClient::SERVICE_UNAVAILABLE;
  79   if (LowerCaseEqualsASCII(trimmed, "unsupported_api_version"))
  80     return WalletClient::UNSUPPORTED_API_VERSION;
  81   if (LowerCaseEqualsASCII(trimmed, "unsupported_user_agent"))
  82     return WalletClient::UNSUPPORTED_USER_AGENT_OR_API_KEY;
  83   if (LowerCaseEqualsASCII(trimmed, "spending_limit_exceeded"))
  84     return WalletClient::SPENDING_LIMIT_EXCEEDED;
  85
  86   DVLOG(1) << "Unknown wallet error string: \"" << error_type << '"';
  87   return WalletClient::UNKNOWN_ERROR;
  88 }
  89
  90 // Get the more specific WalletClient::ErrorType when the error is
  91 // |BUYER_ACCOUNT_ERROR|.
  92 WalletClient::ErrorType BuyerErrorStringToErrorType(
  93     const std::string& message_type_for_buyer) {
  94   std::string trimmed;
  95   base::TrimWhitespaceASCII(message_type_for_buyer, base::TRIM_ALL, &trimmed);
  96   if (LowerCaseEqualsASCII(trimmed, "bla_country_not_supported"))
  97     return WalletClient::BUYER_LEGAL_ADDRESS_NOT_SUPPORTED;
  98   if (LowerCaseEqualsASCII(trimmed, "buyer_kyc_error"))
  99     return WalletClient::UNVERIFIED_KNOW_YOUR_CUSTOMER_STATUS;
 100
 101   return WalletClient::BUYER_ACCOUNT_ERROR;
 102 }
 103
 104 // Gets and parses required actions from a SaveToWallet response. Returns
 105 // false if any unknown required actions are seen and true otherwise.
 106 void GetRequiredActionsForSaveToWallet(
 107     const base::DictionaryValue& dict,
 108     std::vector<RequiredAction>* required_actions) {
 109   const base::ListValue* required_action_list;
 110   if (!dict.GetList("required_action", &required_action_list))
 111     return;
 112
 113   for (size_t i = 0; i < required_action_list->GetSize(); ++i) {
 114     std::string action_string;
 115     if (required_action_list->GetString(i, &action_string)) {
 116       RequiredAction action = ParseRequiredActionFromString(action_string);
 117       if (!ActionAppliesToSaveToWallet(action)) {
 118         DLOG(ERROR) << "Response from Google wallet with bad required action:"
 119                        " \"" << action_string << "\"";
 120         required_actions->clear();
 121         return;
 122       }
 123       required_actions->push_back(action);
 124     }
 125   }
 126 }
 127
 128 void GetFormFieldErrors(const base::DictionaryValue& dict,
 129                         std::vector<FormFieldError>* form_errors) {
 130   DCHECK(form_errors->empty());
 131   const base::ListValue* form_errors_list;
 132   if (!dict.GetList("form_field_error", &form_errors_list))
 133     return;
 134
 135   for (size_t i = 0; i < form_errors_list->GetSize(); ++i) {
 136     const base::DictionaryValue* dictionary;
 137     if (form_errors_list->GetDictionary(i, &dictionary))
 138       form_errors->push_back(FormFieldError::CreateFormFieldError(*dictionary));
 139   }
 140 }
 141
 142 // Converts the |error_type| to the corresponding value from the stable UMA
 143 // metric enumeration.
 144 AutofillMetrics::WalletErrorMetric ErrorTypeToUmaMetric(
 145     WalletClient::ErrorType error_type) {
 146   switch (error_type) {
 147     case WalletClient::BAD_REQUEST:
 148       return AutofillMetrics::WALLET_BAD_REQUEST;
 149     case WalletClient::BUYER_LEGAL_ADDRESS_NOT_SUPPORTED:
 150       return AutofillMetrics::WALLET_BUYER_LEGAL_ADDRESS_NOT_SUPPORTED;
 151     case WalletClient::BUYER_ACCOUNT_ERROR:
 152       return AutofillMetrics::WALLET_BUYER_ACCOUNT_ERROR;
 153     case WalletClient::INTERNAL_ERROR:
 154       return AutofillMetrics::WALLET_INTERNAL_ERROR;
 155     case WalletClient::INVALID_PARAMS:
 156       return AutofillMetrics::WALLET_INVALID_PARAMS;
 157     case WalletClient::UNVERIFIED_KNOW_YOUR_CUSTOMER_STATUS:
 158       return AutofillMetrics::WALLET_UNVERIFIED_KNOW_YOUR_CUSTOMER_STATUS;
 159     case WalletClient::SERVICE_UNAVAILABLE:
 160       return AutofillMetrics::WALLET_SERVICE_UNAVAILABLE;
 161     case WalletClient::UNSUPPORTED_API_VERSION:
 162       return AutofillMetrics::WALLET_UNSUPPORTED_API_VERSION;
 163     case WalletClient::UNSUPPORTED_MERCHANT:
 164       return AutofillMetrics::WALLET_UNSUPPORTED_MERCHANT;
 165     case WalletClient::SPENDING_LIMIT_EXCEEDED:
 166       return AutofillMetrics::WALLET_SPENDING_LIMIT_EXCEEDED;
 167     case WalletClient::MALFORMED_RESPONSE:
 168       return AutofillMetrics::WALLET_MALFORMED_RESPONSE;
 169     case WalletClient::NETWORK_ERROR:
 170       return AutofillMetrics::WALLET_NETWORK_ERROR;
 171     case WalletClient::UNKNOWN_ERROR:
 172       return AutofillMetrics::WALLET_UNKNOWN_ERROR;
 173     case WalletClient::UNSUPPORTED_USER_AGENT_OR_API_KEY:
 174       return AutofillMetrics::WALLET_UNSUPPORTED_USER_AGENT_OR_API_KEY;
 175   }
 176
 177   NOTREACHED();
 178   return AutofillMetrics::WALLET_UNKNOWN_ERROR;
 179 }
 180
 181 // Converts the |required_action| to the corresponding value from the stable UMA
 182 // metric enumeration.
 183 AutofillMetrics::WalletRequiredActionMetric RequiredActionToUmaMetric(
 184     RequiredAction required_action) {
 185   switch (required_action) {
 186     case UNKNOWN_TYPE:
 187       return AutofillMetrics::UNKNOWN_REQUIRED_ACTION;
 188     case CHOOSE_ANOTHER_INSTRUMENT_OR_ADDRESS:
 189       return AutofillMetrics::CHOOSE_ANOTHER_INSTRUMENT_OR_ADDRESS;
 190     case SETUP_WALLET:
 191       return AutofillMetrics::SETUP_WALLET;
 192     case ACCEPT_TOS:
 193       return AutofillMetrics::ACCEPT_TOS;
 194     case GAIA_AUTH:
 195       return AutofillMetrics::GAIA_AUTH;
 196     case UPDATE_EXPIRATION_DATE:
 197       return AutofillMetrics::UPDATE_EXPIRATION_DATE;
 198     case UPGRADE_MIN_ADDRESS:
 199       return AutofillMetrics::UPGRADE_MIN_ADDRESS;
 200     case INVALID_FORM_FIELD:
 201       return AutofillMetrics::INVALID_FORM_FIELD;
 202     case VERIFY_CVV:
 203       return AutofillMetrics::VERIFY_CVV;
 204     case PASSIVE_GAIA_AUTH:
 205       return AutofillMetrics::PASSIVE_GAIA_AUTH;
 206     case REQUIRE_PHONE_NUMBER:
 207       return AutofillMetrics::REQUIRE_PHONE_NUMBER;
 208   }
 209
 210   NOTREACHED();
 211   return AutofillMetrics::UNKNOWN_REQUIRED_ACTION;
 212 }
 213
 214 // Keys for JSON communication with the Online Wallet server.
 215 const char kAcceptedLegalDocumentKey[] = "accepted_legal_document";
 216 const char kApiKeyKey[] = "api_key";
 217 const char kAuthResultKey[] = "auth_result";
 218 const char kErrorTypeKey[] = "wallet_error.error_type";
 219 const char kFeatureKey[] = "feature";
 220 const char kGoogleTransactionIdKey[] = "google_transaction_id";
 221 const char kInstrumentIdKey[] = "instrument_id";
 222 const char kInstrumentKey[] = "instrument";
 223 const char kInstrumentExpMonthKey[] = "instrument.credit_card.exp_month";
 224 const char kInstrumentExpYearKey[] = "instrument.credit_card.exp_year";
 225 const char kInstrumentType[] = "instrument.type";
 226 const char kInstrumentPhoneNumberKey[] = "instrument_phone_number";
 227 const char kMerchantDomainKey[] = "merchant_domain";
 228 const char kMessageTypeForBuyerKey[] = "wallet_error.message_type_for_buyer";
 229 const char kNewWalletUser[] = "new_wallet_user";
 230 const char kPhoneNumberRequired[] = "phone_number_required";
 231 const char kRiskCapabilitiesKey[] = "supported_risk_challenge";
 232 const char kRiskParamsKey[] = "risk_params";
 233 const char kSelectedAddressIdKey[] = "selected_address_id";
 234 const char kSelectedInstrumentIdKey[] = "selected_instrument_id";
 235 const char kShippingAddressIdKey[] = "shipping_address_id";
 236 const char kShippingAddressKey[] = "shipping_address";
 237 const char kShippingAddressRequired[] = "shipping_address_required";
 238 const char kTransactionAmountKey[] = "estimated_total_price";
 239 const char kTransactionCurrencyKey[] = "currency_code";
 240 const char kUpgradedBillingAddressKey[] = "upgraded_billing_address";
 241 const char kUpgradedInstrumentIdKey[] = "upgraded_instrument_id";
 242 const char kUseMinimalAddresses[] = "use_minimal_addresses";
 243
 244 }  // namespace
 245
 246 WalletClient::FullWalletRequest::FullWalletRequest(
 247     const std::string& instrument_id,
 248     const std::string& address_id,
 249     const std::string& google_transaction_id,
 250     const std::vector<RiskCapability> risk_capabilities,
 251     bool new_wallet_user)
 252     : instrument_id(instrument_id),
 253       address_id(address_id),
 254       google_transaction_id(google_transaction_id),
 255       risk_capabilities(risk_capabilities),
 256       new_wallet_user(new_wallet_user) {}
 257
 258 WalletClient::FullWalletRequest::~FullWalletRequest() {}
 259
 260 WalletClient::WalletClient(net::URLRequestContextGetter* context_getter,
 261                            WalletClientDelegate* delegate,
 262                            const GURL& source_url)
 263     : context_getter_(context_getter),
 264       delegate_(delegate),
 265       user_index_(0U),
 266       source_url_(source_url),
 267       request_type_(NO_REQUEST),
 268       one_time_pad_(kOneTimePadLength),
 269       weak_ptr_factory_(this) {
 270   DCHECK(context_getter_.get());
 271   DCHECK(delegate_);
 272 }
 273
 274 WalletClient::~WalletClient() {}
 275
 276 void WalletClient::AcceptLegalDocuments(
 277     const std::vector<WalletItems::LegalDocument*>& documents,
 278     const std::string& google_transaction_id) {
 279   if (documents.empty())
 280     return;
 281
 282   std::vector<std::string> document_ids;
 283   for (size_t i = 0; i < documents.size(); ++i) {
 284     document_ids.push_back(documents[i]->id());
 285   }
 286   DoAcceptLegalDocuments(document_ids, google_transaction_id);
 287 }
 288
 289 void WalletClient::AuthenticateInstrument(
 290     const std::string& instrument_id,
 291     const std::string& card_verification_number) {
 292   base::DictionaryValue request_dict;
 293   request_dict.SetString(kApiKeyKey, google_apis::GetAPIKey());
 294   request_dict.SetString(kRiskParamsKey, delegate_->GetRiskData());
 295   request_dict.SetString(kInstrumentIdKey, instrument_id);
 296
 297   std::string json_payload;
 298   base::JSONWriter::Write(&request_dict, &json_payload);
 299
 300   std::string escaped_card_verification_number = net::EscapeUrlEncodedData(
 301       card_verification_number, true);
 302
 303   std::string post_body = base::StringPrintf(
 304       kEscrowCardVerificationNumberFormat,
 305       net::EscapeUrlEncodedData(json_payload, true).c_str(),
 306       escaped_card_verification_number.c_str());
 307
 308   MakeWalletRequest(GetAuthenticateInstrumentUrl(user_index_),
 309                     post_body,
 310                     kFormEncodedMimeType,
 311                     AUTHENTICATE_INSTRUMENT);
 312 }
 313
 314 void WalletClient::GetFullWallet(const FullWalletRequest& full_wallet_request) {
 315   base::DictionaryValue request_dict;
 316   request_dict.SetString(kApiKeyKey, google_apis::GetAPIKey());
 317   request_dict.SetString(kRiskParamsKey, delegate_->GetRiskData());
 318   request_dict.SetBoolean(kUseMinimalAddresses, false);
 319   request_dict.SetBoolean(kPhoneNumberRequired, true);
 320   request_dict.SetBoolean(kNewWalletUser, full_wallet_request.new_wallet_user);
 321
 322   request_dict.SetString(kSelectedInstrumentIdKey,
 323                          full_wallet_request.instrument_id);
 324   request_dict.SetString(kSelectedAddressIdKey, full_wallet_request.address_id);
 325   request_dict.SetString(
 326       kMerchantDomainKey,
 327       source_url_.GetWithEmptyPath().spec());
 328   request_dict.SetString(kGoogleTransactionIdKey,
 329                          full_wallet_request.google_transaction_id);
 330   request_dict.SetString(kFeatureKey, "REQUEST_AUTOCOMPLETE");
 331
 332   scoped_ptr<base::ListValue> risk_capabilities_list(new base::ListValue());
 333   for (std::vector<RiskCapability>::const_iterator it =
 334            full_wallet_request.risk_capabilities.begin();
 335        it != full_wallet_request.risk_capabilities.end();
 336        ++it) {
 337     risk_capabilities_list->AppendString(RiskCapabilityToString(*it));
 338   }
 339   request_dict.Set(kRiskCapabilitiesKey, risk_capabilities_list.release());
 340
 341   std::string json_payload;
 342   base::JSONWriter::Write(&request_dict, &json_payload);
 343
 344   crypto::RandBytes(&(one_time_pad_[0]), one_time_pad_.size());
 345
 346   size_t num_bits = one_time_pad_.size() * 8;
 347   DCHECK_LE(num_bits, kMaxBits);
 348   DCHECK_GE(num_bits, kMinBits);
 349
 350   std::string post_body = base::StringPrintf(
 351       kGetFullWalletRequestFormat,
 352       net::EscapeUrlEncodedData(json_payload, true).c_str(),
 353       base::HexEncode(&num_bits, 1).c_str(),
 354       base::HexEncode(&(one_time_pad_[0]), one_time_pad_.size()).c_str());
 355
 356   MakeWalletRequest(GetGetFullWalletUrl(user_index_),
 357                     post_body,
 358                     kFormEncodedMimeType,
 359                     GET_FULL_WALLET);
 360 }
 361
 362 void WalletClient::SaveToWallet(
 363     scoped_ptr<Instrument> instrument,
 364     scoped_ptr<Address> address,
 365     const WalletItems::MaskedInstrument* reference_instrument,
 366     const Address* reference_address) {
 367   DCHECK(instrument || address);
 368
 369   base::DictionaryValue request_dict;
 370   request_dict.SetString(kApiKeyKey, google_apis::GetAPIKey());
 371   request_dict.SetString(kRiskParamsKey, delegate_->GetRiskData());
 372   request_dict.SetString(kMerchantDomainKey,
 373                          source_url_.GetWithEmptyPath().spec());
 374   request_dict.SetBoolean(kUseMinimalAddresses, false);
 375   request_dict.SetBoolean(kPhoneNumberRequired, true);
 376
 377   std::string primary_account_number;
 378   std::string card_verification_number;
 379   if (instrument) {
 380     primary_account_number = net::EscapeUrlEncodedData(
 381         base::UTF16ToUTF8(instrument->primary_account_number()), true);
 382     card_verification_number = net::EscapeUrlEncodedData(
 383         base::UTF16ToUTF8(instrument->card_verification_number()), true);
 384
 385     if (!reference_instrument) {
 386       request_dict.Set(kInstrumentKey, instrument->ToDictionary().release());
 387       request_dict.SetString(kInstrumentPhoneNumberKey,
 388                              instrument->address()->phone_number());
 389     } else {
 390       DCHECK(!reference_instrument->object_id().empty());
 391
 392       int new_month = instrument->expiration_month();
 393       int new_year = instrument->expiration_year();
 394       bool expiration_date_changed =
 395           new_month != reference_instrument->expiration_month() ||
 396           new_year != reference_instrument->expiration_year();
 397
 398       DCHECK(instrument->address() || expiration_date_changed);
 399
 400       request_dict.SetString(kUpgradedInstrumentIdKey,
 401                              reference_instrument->object_id());
 402
 403       if (instrument->address()) {
 404         request_dict.SetString(kInstrumentPhoneNumberKey,
 405                                instrument->address()->phone_number());
 406         request_dict.Set(
 407             kUpgradedBillingAddressKey,
 408             instrument->address()->ToDictionaryWithoutID().release());
 409       }
 410
 411       if (expiration_date_changed) {
 412         // Updating expiration date requires a CVC.
 413         DCHECK(!instrument->card_verification_number().empty());
 414         request_dict.SetInteger(kInstrumentExpMonthKey,
 415                                 instrument->expiration_month());
 416         request_dict.SetInteger(kInstrumentExpYearKey,
 417                                 instrument->expiration_year());
 418       }
 419
 420       if (request_dict.HasKey(kInstrumentKey))
 421         request_dict.SetString(kInstrumentType, "CREDIT_CARD");
 422     }
 423   }
 424   if (address) {
 425     if (reference_address) {
 426       address->set_object_id(reference_address->object_id());
 427       DCHECK(!address->object_id().empty());
 428     }
 429     request_dict.Set(kShippingAddressKey,
 430                      address->ToDictionaryWithID().release());
 431   }
 432
 433   std::string json_payload;
 434   base::JSONWriter::Write(&request_dict, &json_payload);
 435
 436   if (!card_verification_number.empty()) {
 437     std::string post_body;
 438     if (!primary_account_number.empty()) {
 439       post_body = base::StringPrintf(
 440           kEscrowNewInstrumentFormat,
 441           net::EscapeUrlEncodedData(json_payload, true).c_str(),
 442           card_verification_number.c_str(),
 443           primary_account_number.c_str());
 444     } else {
 445       post_body = base::StringPrintf(
 446           kEscrowCardVerificationNumberFormat,
 447           net::EscapeUrlEncodedData(json_payload, true).c_str(),
 448           card_verification_number.c_str());
 449     }
 450     MakeWalletRequest(GetSaveToWalletUrl(user_index_),
 451                       post_body,
 452                       kFormEncodedMimeType,
 453                       SAVE_TO_WALLET);
 454   } else {
 455     MakeWalletRequest(GetSaveToWalletNoEscrowUrl(user_index_),
 456                       json_payload,
 457                       kJsonMimeType,
 458                       SAVE_TO_WALLET);
 459   }
 460 }
 461
 462 void WalletClient::GetWalletItems(const base::string16& amount,
 463                                   const base::string16& currency) {
 464   base::DictionaryValue request_dict;
 465   request_dict.SetString(kApiKeyKey, google_apis::GetAPIKey());
 466   request_dict.SetString(kMerchantDomainKey,
 467                          source_url_.GetWithEmptyPath().spec());
 468   request_dict.SetBoolean(kShippingAddressRequired,
 469                           delegate_->IsShippingAddressRequired());
 470   request_dict.SetBoolean(kUseMinimalAddresses, false);
 471   request_dict.SetBoolean(kPhoneNumberRequired, true);
 472
 473   if (!amount.empty())
 474     request_dict.SetString(kTransactionAmountKey, amount);
 475   if (!currency.empty())
 476     request_dict.SetString(kTransactionCurrencyKey, currency);
 477
 478   std::string post_body;
 479   base::JSONWriter::Write(&request_dict, &post_body);
 480
 481   MakeWalletRequest(GetGetWalletItemsUrl(user_index_),
 482                     post_body,
 483                     kJsonMimeType,
 484                     GET_WALLET_ITEMS);
 485 }
 486
 487 bool WalletClient::HasRequestInProgress() const {
 488   return request_;
 489 }
 490
 491 void WalletClient::CancelRequest() {
 492   request_.reset();
 493   request_type_ = NO_REQUEST;
 494 }
 495
 496 void WalletClient::SetUserIndex(size_t user_index) {
 497   CancelRequest();
 498   user_index_ = user_index;
 499 }
 500
 501 void WalletClient::DoAcceptLegalDocuments(
 502     const std::vector<std::string>& document_ids,
 503     const std::string& google_transaction_id) {
 504   base::DictionaryValue request_dict;
 505   request_dict.SetString(kApiKeyKey, google_apis::GetAPIKey());
 506   request_dict.SetString(kGoogleTransactionIdKey, google_transaction_id);
 507   request_dict.SetString(kMerchantDomainKey,
 508                          source_url_.GetWithEmptyPath().spec());
 509   scoped_ptr<base::ListValue> docs_list(new base::ListValue());
 510   for (std::vector<std::string>::const_iterator it = document_ids.begin();
 511        it != document_ids.end(); ++it) {
 512     if (!it->empty())
 513       docs_list->AppendString(*it);
 514   }
 515   request_dict.Set(kAcceptedLegalDocumentKey, docs_list.release());
 516
 517   std::string post_body;
 518   base::JSONWriter::Write(&request_dict, &post_body);
 519
 520   MakeWalletRequest(GetAcceptLegalDocumentsUrl(user_index_),
 521                     post_body,
 522                     kJsonMimeType,
 523                     ACCEPT_LEGAL_DOCUMENTS);
 524 }
 525
 526 void WalletClient::MakeWalletRequest(const GURL& url,
 527                                      const std::string& post_body,
 528                                      const std::string& mime_type,
 529                                      RequestType request_type) {
 530   DCHECK_EQ(request_type_, NO_REQUEST);
 531   request_type_ = request_type;
 532
 533   request_.reset(net::URLFetcher::Create(
 534       0, url, net::URLFetcher::POST, this));
 535   request_->SetRequestContext(context_getter_.get());
 536   DVLOG(1) << "Making request to " << url << " with post_body=" << post_body;
 537   request_->SetUploadData(mime_type, post_body);
 538   request_->AddExtraRequestHeader("Authorization: GoogleLogin auth=" +
 539                                   delegate_->GetWalletCookieValue());
 540   DVLOG(1) << "Setting authorization header value to "
 541            << delegate_->GetWalletCookieValue();
 542   request_started_timestamp_ = base::Time::Now();
 543   request_->Start();
 544
 545   delegate_->GetMetricLogger().LogWalletErrorMetric(
 546       AutofillMetrics::WALLET_ERROR_BASELINE_ISSUED_REQUEST);
 547   delegate_->GetMetricLogger().LogWalletRequiredActionMetric(
 548       AutofillMetrics::WALLET_REQUIRED_ACTION_BASELINE_ISSUED_REQUEST);
 549 }
 550
 551 // TODO(ahutter): Add manual retry logic if it's necessary.
 552 void WalletClient::OnURLFetchComplete(
 553     const net::URLFetcher* source) {
 554   delegate_->GetMetricLogger().LogWalletApiCallDuration(
 555       RequestTypeToUmaMetric(request_type_),
 556       base::Time::Now() - request_started_timestamp_);
 557
 558   DCHECK_EQ(source, request_.get());
 559   DVLOG(1) << "Got response from " << source->GetOriginalURL();
 560
 561   // |request_|, which is aliased to |source|, might continue to be used in this
 562   // |method, but should be freed once control leaves the method.
 563   scoped_ptr<net::URLFetcher> scoped_request(request_.Pass());
 564
 565   std::string data;
 566   source->GetResponseAsString(&data);
 567   DVLOG(1) << "Response body: " << data;
 568
 569   scoped_ptr<base::DictionaryValue> response_dict;
 570
 571   int response_code = source->GetResponseCode();
 572   delegate_->GetMetricLogger().LogWalletResponseCode(response_code);
 573
 574   switch (response_code) {
 575     // HTTP_BAD_REQUEST means the arguments are invalid. No point retrying.
 576     case net::HTTP_BAD_REQUEST: {
 577       request_type_ = NO_REQUEST;
 578       HandleWalletError(BAD_REQUEST);
 579       return;
 580     }
 581
 582     // Valid response.
 583     case net::HTTP_OK: {
 584       scoped_ptr<base::Value> message_value(base::JSONReader::Read(data));
 585       if (message_value.get() &&
 586           message_value->IsType(base::Value::TYPE_DICTIONARY)) {
 587         response_dict.reset(
 588             static_cast<base::DictionaryValue*>(message_value.release()));
 589       }
 590       break;
 591     }
 592
 593     // Response contains an error to show the user.
 594     case net::HTTP_FORBIDDEN:
 595     case net::HTTP_INTERNAL_SERVER_ERROR: {
 596       scoped_ptr<base::Value> message_value(base::JSONReader::Read(data));
 597       if (message_value.get() &&
 598           message_value->IsType(base::Value::TYPE_DICTIONARY)) {
 599         response_dict.reset(
 600             static_cast<base::DictionaryValue*>(message_value.release()));
 601       }
 602
 603       request_type_ = NO_REQUEST;
 604
 605       std::string error_type_string;
 606       if (!response_dict->GetString(kErrorTypeKey, &error_type_string)) {
 607         HandleWalletError(UNKNOWN_ERROR);
 608         return;
 609       }
 610       WalletClient::ErrorType error_type = StringToErrorType(error_type_string);
 611       if (error_type == BUYER_ACCOUNT_ERROR) {
 612         // If the error_type is |BUYER_ACCOUNT_ERROR|, then
 613         // message_type_for_buyer field contains more specific information
 614         // about the error.
 615         std::string message_type_for_buyer_string;
 616         if (response_dict->GetString(kMessageTypeForBuyerKey,
 617                                      &message_type_for_buyer_string)) {
 618           error_type =
 619               BuyerErrorStringToErrorType(message_type_for_buyer_string);
 620         }
 621       }
 622
 623       HandleWalletError(error_type);
 624       return;
 625     }
 626
 627     // Handle anything else as a generic error.
 628     default:
 629       request_type_ = NO_REQUEST;
 630       HandleWalletError(NETWORK_ERROR);
 631       return;
 632   }
 633
 634   RequestType type = request_type_;
 635   request_type_ = NO_REQUEST;
 636
 637   if (type != ACCEPT_LEGAL_DOCUMENTS && !response_dict) {
 638     HandleMalformedResponse(type, scoped_request.get());
 639     return;
 640   }
 641
 642   switch (type) {
 643     case ACCEPT_LEGAL_DOCUMENTS:
 644       delegate_->OnDidAcceptLegalDocuments();
 645       break;
 646
 647     case AUTHENTICATE_INSTRUMENT: {
 648       std::string auth_result;
 649       if (response_dict->GetString(kAuthResultKey, &auth_result)) {
 650         std::string trimmed;
 651         base::TrimWhitespaceASCII(auth_result, base::TRIM_ALL, &trimmed);
 652         delegate_->OnDidAuthenticateInstrument(
 653             LowerCaseEqualsASCII(trimmed, "success"));
 654       } else {
 655         HandleMalformedResponse(type, scoped_request.get());
 656       }
 657       break;
 658     }
 659
 660     case GET_FULL_WALLET: {
 661       scoped_ptr<FullWallet> full_wallet(
 662           FullWallet::CreateFullWallet(*response_dict));
 663       if (full_wallet) {
 664         full_wallet->set_one_time_pad(one_time_pad_);
 665         LogRequiredActions(full_wallet->required_actions());
 666         delegate_->OnDidGetFullWallet(full_wallet.Pass());
 667       } else {
 668         HandleMalformedResponse(type, scoped_request.get());
 669       }
 670       break;
 671     }
 672
 673     case GET_WALLET_ITEMS: {
 674       scoped_ptr<WalletItems> wallet_items(
 675           WalletItems::CreateWalletItems(*response_dict));
 676       if (wallet_items) {
 677         LogRequiredActions(wallet_items->required_actions());
 678         delegate_->OnDidGetWalletItems(wallet_items.Pass());
 679       } else {
 680         HandleMalformedResponse(type, scoped_request.get());
 681       }
 682       break;
 683     }
 684
 685     case SAVE_TO_WALLET: {
 686       std::string instrument_id;
 687       response_dict->GetString(kInstrumentIdKey, &instrument_id);
 688       std::string shipping_address_id;
 689       response_dict->GetString(kShippingAddressIdKey,
 690                                &shipping_address_id);
 691       std::vector<RequiredAction> required_actions;
 692       GetRequiredActionsForSaveToWallet(*response_dict, &required_actions);
 693       std::vector<FormFieldError> form_errors;
 694       GetFormFieldErrors(*response_dict, &form_errors);
 695       if (instrument_id.empty() && shipping_address_id.empty() &&
 696           required_actions.empty()) {
 697         HandleMalformedResponse(type, scoped_request.get());
 698       } else {
 699         LogRequiredActions(required_actions);
 700         delegate_->OnDidSaveToWallet(instrument_id,
 701                                      shipping_address_id,
 702                                      required_actions,
 703                                      form_errors);
 704       }
 705       break;
 706     }
 707
 708     case NO_REQUEST:
 709       NOTREACHED();
 710   }
 711 }
 712
 713 void WalletClient::HandleMalformedResponse(RequestType request_type,
 714                                            net::URLFetcher* request) {
 715   // Called to inform exponential backoff logic of the error.
 716   request->ReceivedContentWasMalformed();
 717   // Record failed API call in metrics.
 718   delegate_->GetMetricLogger().LogWalletMalformedResponseMetric(
 719     RequestTypeToUmaMetric(request_type));
 720   HandleWalletError(MALFORMED_RESPONSE);
 721 }
 722
 723 void WalletClient::HandleWalletError(WalletClient::ErrorType error_type) {
 724   std::string error_message;
 725   switch (error_type) {
 726     case WalletClient::BAD_REQUEST:
 727       error_message = "WALLET_BAD_REQUEST";
 728       break;
 729     case WalletClient::BUYER_LEGAL_ADDRESS_NOT_SUPPORTED:
 730       error_message = "WALLET_BUYER_LEGAL_ADDRESS_NOT_SUPPORTED";
 731       break;
 732     case WalletClient::BUYER_ACCOUNT_ERROR:
 733       error_message = "WALLET_BUYER_ACCOUNT_ERROR";
 734       break;
 735     case WalletClient::INTERNAL_ERROR:
 736       error_message = "WALLET_INTERNAL_ERROR";
 737       break;
 738     case WalletClient::INVALID_PARAMS:
 739       error_message = "WALLET_INVALID_PARAMS";
 740       break;
 741     case WalletClient::UNVERIFIED_KNOW_YOUR_CUSTOMER_STATUS:
 742       error_message = "WALLET_UNVERIFIED_KNOW_YOUR_CUSTOMER_STATUS";
 743       break;
 744     case WalletClient::SPENDING_LIMIT_EXCEEDED:
 745       error_message = "SPENDING_LIMIT_EXCEEDED";
 746       break;
 747     case WalletClient::SERVICE_UNAVAILABLE:
 748       error_message = "WALLET_SERVICE_UNAVAILABLE";
 749       break;
 750     case WalletClient::UNSUPPORTED_API_VERSION:
 751       error_message = "WALLET_UNSUPPORTED_API_VERSION";
 752       break;
 753     case WalletClient::UNSUPPORTED_MERCHANT:
 754       error_message = "WALLET_UNSUPPORTED_MERCHANT";
 755       break;
 756     case WalletClient::MALFORMED_RESPONSE:
 757       error_message = "WALLET_MALFORMED_RESPONSE";
 758       break;
 759     case WalletClient::NETWORK_ERROR:
 760       error_message = "WALLET_NETWORK_ERROR";
 761       break;
 762     case WalletClient::UNKNOWN_ERROR:
 763       error_message = "WALLET_UNKNOWN_ERROR";
 764       break;
 765     case WalletClient::UNSUPPORTED_USER_AGENT_OR_API_KEY:
 766       error_message = "WALLET_UNSUPPORTED_USER_AGENT_OR_API_KEY";
 767       break;
 768   }
 769
 770   DVLOG(1) << "Wallet encountered a " << error_message;
 771
 772   delegate_->OnWalletError(error_type);
 773   delegate_->GetMetricLogger().LogWalletErrorMetric(
 774       ErrorTypeToUmaMetric(error_type));
 775 }
 776
 777 // Logs an UMA metric for each of the |required_actions|.
 778 void WalletClient::LogRequiredActions(
 779     const std::vector<RequiredAction>& required_actions) const {
 780   for (size_t i = 0; i < required_actions.size(); ++i) {
 781     delegate_->GetMetricLogger().LogWalletRequiredActionMetric(
 782         RequiredActionToUmaMetric(required_actions[i]));
 783   }
 784 }
 785
 786 AutofillMetrics::WalletApiCallMetric WalletClient::RequestTypeToUmaMetric(
 787     RequestType request_type) const {
 788   switch (request_type) {
 789     case ACCEPT_LEGAL_DOCUMENTS:
 790       return AutofillMetrics::ACCEPT_LEGAL_DOCUMENTS;
 791     case AUTHENTICATE_INSTRUMENT:
 792       return AutofillMetrics::AUTHENTICATE_INSTRUMENT;
 793     case GET_FULL_WALLET:
 794       return AutofillMetrics::GET_FULL_WALLET;
 795     case GET_WALLET_ITEMS:
 796       return AutofillMetrics::GET_WALLET_ITEMS;
 797     case SAVE_TO_WALLET:
 798       return AutofillMetrics::SAVE_TO_WALLET;
 799     case NO_REQUEST:
 800       NOTREACHED();
 801       return AutofillMetrics::UNKNOWN_API_CALL;
 802   }
 803
 804   NOTREACHED();
 805   return AutofillMetrics::UNKNOWN_API_CALL;
 806 }
 807
 808 }  // namespace wallet
 809 }  // namespace autofill