chrome/service/cloud_print/printer_job_handler.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 "chrome/service/cloud_print/printer_job_handler.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/file_util.h"
  10 #include "base/json/json_reader.h"
  11 #include "base/md5.h"
  12 #include "base/metrics/histogram.h"
  13 #include "base/strings/stringprintf.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/values.h"
  16 #include "chrome/common/cloud_print/cloud_print_constants.h"
  17 #include "chrome/common/cloud_print/cloud_print_helpers.h"
  18 #include "chrome/service/cloud_print/cloud_print_helpers.h"
  19 #include "chrome/service/cloud_print/job_status_updater.h"
  20 #include "grit/generated_resources.h"
  21 #include "net/base/mime_util.h"
  22 #include "net/http/http_response_headers.h"
  23 #include "net/http/http_status_code.h"
  24 #include "printing/backend/print_backend.h"
  25 #include "ui/base/l10n/l10n_util.h"
  26 #include "url/gurl.h"
  27
  28 namespace cloud_print {
  29
  30 namespace {
  31
  32 base::subtle::Atomic32 g_total_jobs_started = 0;
  33 base::subtle::Atomic32 g_total_jobs_done = 0;
  34
  35 enum PrinterJobHandlerEvent {
  36   JOB_HANDLER_CHECK_FOR_JOBS,
  37   JOB_HANDLER_START,
  38   JOB_HANDLER_PENDING_TASK,
  39   JOB_HANDLER_PRINTER_UPDATE,
  40   JOB_HANDLER_JOB_CHECK,
  41   JOB_HANDLER_JOB_STARTED,
  42   JOB_HANDLER_VALID_TICKET,
  43   JOB_HANDLER_DATA,
  44   JOB_HANDLER_SET_IN_PROGRESS,
  45   JOB_HANDLER_SET_START_PRINTING,
  46   JOB_HANDLER_START_SPOOLING,
  47   JOB_HANDLER_SPOOLED,
  48   JOB_HANDLER_JOB_COMPLETED,
  49   JOB_HANDLER_INVALID_TICKET,
  50   JOB_HANDLER_INVALID_DATA,
  51   JOB_HANDLER_MAX,
  52 };
  53
  54 }  // namespace
  55
  56 PrinterJobHandler::PrinterInfoFromCloud::PrinterInfoFromCloud()
  57     : current_xmpp_timeout(0), pending_xmpp_timeout(0) {
  58 }
  59
  60 PrinterJobHandler::PrinterJobHandler(
  61     const printing::PrinterBasicInfo& printer_info,
  62     const PrinterInfoFromCloud& printer_info_cloud,
  63     const GURL& cloud_print_server_url,
  64     PrintSystem* print_system,
  65     Delegate* delegate)
  66     : print_system_(print_system),
  67       printer_info_(printer_info),
  68       printer_info_cloud_(printer_info_cloud),
  69       cloud_print_server_url_(cloud_print_server_url),
  70       delegate_(delegate),
  71       local_job_id_(-1),
  72       next_json_data_handler_(NULL),
  73       next_data_handler_(NULL),
  74       server_error_count_(0),
  75       print_thread_("Chrome_CloudPrintJobPrintThread"),
  76       job_handler_message_loop_proxy_(
  77           base::MessageLoopProxy::current()),
  78       shutting_down_(false),
  79       job_check_pending_(false),
  80       printer_update_pending_(true),
  81       task_in_progress_(false),
  82       weak_ptr_factory_(this) {
  83 }
  84
  85 bool PrinterJobHandler::Initialize() {
  86   if (!print_system_->IsValidPrinter(printer_info_.printer_name))
  87     return false;
  88
  89   printer_watcher_ = print_system_->CreatePrinterWatcher(
  90       printer_info_.printer_name);
  91   printer_watcher_->StartWatching(this);
  92   CheckForJobs(kJobFetchReasonStartup);
  93   return true;
  94 }
  95
  96 std::string PrinterJobHandler::GetPrinterName() const {
  97   return printer_info_.printer_name;
  98 }
  99
 100 void PrinterJobHandler::CheckForJobs(const std::string& reason) {
 101   VLOG(1) << "CP_CONNECTOR: Checking for jobs"
 102           << ", printer id: " << printer_info_cloud_.printer_id
 103           << ", reason: " << reason
 104           << ", task in progress: " << task_in_progress_;
 105   UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 106                             JOB_HANDLER_CHECK_FOR_JOBS, JOB_HANDLER_MAX);
 107   job_fetch_reason_ = reason;
 108   job_check_pending_ = true;
 109   if (!task_in_progress_) {
 110     base::MessageLoop::current()->PostTask(
 111         FROM_HERE, base::Bind(&PrinterJobHandler::Start, this));
 112   }
 113 }
 114
 115 void PrinterJobHandler::Shutdown() {
 116   VLOG(1) << "CP_CONNECTOR: Shutting down printer job handler"
 117           << ", printer id: " << printer_info_cloud_.printer_id;
 118   Reset();
 119   shutting_down_ = true;
 120   while (!job_status_updater_list_.empty()) {
 121     // Calling Stop() will cause the OnJobCompleted to be called which will
 122     // remove the updater object from the list.
 123     job_status_updater_list_.front()->Stop();
 124   }
 125 }
 126
 127 // CloudPrintURLFetcher::Delegate implementation.
 128 CloudPrintURLFetcher::ResponseAction PrinterJobHandler::HandleRawResponse(
 129     const net::URLFetcher* source,
 130     const GURL& url,
 131     const net::URLRequestStatus& status,
 132     int response_code,
 133     const net::ResponseCookies& cookies,
 134     const std::string& data) {
 135   // 415 (Unsupported media type) error while fetching data from the server
 136   // means data conversion error. Stop fetching process and mark job as error.
 137   if (next_data_handler_ == (&PrinterJobHandler::HandlePrintDataResponse) &&
 138       response_code == net::HTTP_UNSUPPORTED_MEDIA_TYPE) {
 139     VLOG(1) << "CP_CONNECTOR: Job failed (unsupported media type)";
 140     base::MessageLoop::current()->PostTask(
 141         FROM_HERE,
 142         base::Bind(&PrinterJobHandler::JobFailed, this, JOB_DOWNLOAD_FAILED));
 143     return CloudPrintURLFetcher::STOP_PROCESSING;
 144   }
 145   return CloudPrintURLFetcher::CONTINUE_PROCESSING;
 146 }
 147
 148 CloudPrintURLFetcher::ResponseAction PrinterJobHandler::HandleRawData(
 149     const net::URLFetcher* source,
 150     const GURL& url,
 151     const std::string& data) {
 152   if (!next_data_handler_)
 153     return CloudPrintURLFetcher::CONTINUE_PROCESSING;
 154   return (this->*next_data_handler_)(source, url, data);
 155 }
 156
 157 CloudPrintURLFetcher::ResponseAction PrinterJobHandler::HandleJSONData(
 158     const net::URLFetcher* source,
 159     const GURL& url,
 160     DictionaryValue* json_data,
 161     bool succeeded) {
 162   DCHECK(next_json_data_handler_);
 163   return (this->*next_json_data_handler_)(source, url, json_data, succeeded);
 164 }
 165
 166 // Mark the job fetch as failed and check if other jobs can be printed
 167 void PrinterJobHandler::OnRequestGiveUp() {
 168   if (job_queue_handler_.JobFetchFailed(job_details_.job_id_)) {
 169     VLOG(1) << "CP_CONNECTOR: Job failed to load (scheduling retry)";
 170     CheckForJobs(kJobFetchReasonFailure);
 171     base::MessageLoop::current()->PostTask(
 172         FROM_HERE, base::Bind(&PrinterJobHandler::Stop, this));
 173   } else {
 174     VLOG(1) << "CP_CONNECTOR: Job failed (giving up after " <<
 175         kNumRetriesBeforeAbandonJob << " retries)";
 176     base::MessageLoop::current()->PostTask(
 177         FROM_HERE,
 178         base::Bind(&PrinterJobHandler::JobFailed, this, JOB_DOWNLOAD_FAILED));
 179   }
 180 }
 181
 182 CloudPrintURLFetcher::ResponseAction PrinterJobHandler::OnRequestAuthError() {
 183   // We got an Auth error and have no idea how long it will take to refresh
 184   // auth information (may take forever). We'll drop current request and
 185   // propagate this error to the upper level. After auth issues will be
 186   // resolved, GCP connector will restart.
 187   OnAuthError();
 188   return CloudPrintURLFetcher::STOP_PROCESSING;
 189 }
 190
 191 std::string PrinterJobHandler::GetAuthHeader() {
 192   return GetCloudPrintAuthHeaderFromStore();
 193 }
 194
 195 // JobStatusUpdater::Delegate implementation
 196 bool PrinterJobHandler::OnJobCompleted(JobStatusUpdater* updater) {
 197   UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 198                             JOB_HANDLER_JOB_COMPLETED, JOB_HANDLER_MAX);
 199   UMA_HISTOGRAM_LONG_TIMES("CloudPrint.PrintingTime",
 200                            base::Time::Now() - updater->start_time());
 201   bool ret = false;
 202   base::subtle::NoBarrier_AtomicIncrement(&g_total_jobs_done, 1);
 203   job_queue_handler_.JobDone(job_details_.job_id_);
 204
 205   for (JobStatusUpdaterList::iterator index = job_status_updater_list_.begin();
 206        index != job_status_updater_list_.end(); index++) {
 207     if (index->get() == updater) {
 208       job_status_updater_list_.erase(index);
 209       ret = true;
 210       break;
 211     }
 212   }
 213   return ret;
 214 }
 215
 216 void PrinterJobHandler::OnAuthError() {
 217   base::MessageLoop::current()->PostTask(
 218       FROM_HERE, base::Bind(&PrinterJobHandler::Stop, this));
 219   if (delegate_)
 220     delegate_->OnAuthError();
 221 }
 222
 223 void PrinterJobHandler::OnPrinterDeleted() {
 224   if (delegate_)
 225     delegate_->OnPrinterDeleted(printer_info_cloud_.printer_id);
 226 }
 227
 228 void PrinterJobHandler::OnPrinterChanged() {
 229   printer_update_pending_ = true;
 230   if (!task_in_progress_) {
 231     base::MessageLoop::current()->PostTask(
 232         FROM_HERE, base::Bind(&PrinterJobHandler::Start, this));
 233   }
 234 }
 235
 236 void PrinterJobHandler::OnJobChanged() {
 237   // Some job on the printer changed. Loop through all our JobStatusUpdaters
 238   // and have them check for updates.
 239   for (JobStatusUpdaterList::iterator index = job_status_updater_list_.begin();
 240        index != job_status_updater_list_.end(); index++) {
 241     base::MessageLoop::current()->PostTask(
 242         FROM_HERE, base::Bind(&JobStatusUpdater::UpdateStatus, index->get()));
 243   }
 244 }
 245
 246 void PrinterJobHandler::OnJobSpoolSucceeded(const PlatformJobId& job_id) {
 247   DCHECK(base::MessageLoop::current() == print_thread_.message_loop());
 248   job_spooler_ = NULL;
 249   job_handler_message_loop_proxy_->PostTask(
 250       FROM_HERE, base::Bind(&PrinterJobHandler::JobSpooled, this, job_id));
 251 }
 252
 253 void PrinterJobHandler::OnJobSpoolFailed() {
 254   DCHECK(base::MessageLoop::current() == print_thread_.message_loop());
 255   job_spooler_ = NULL;
 256   VLOG(1) << "CP_CONNECTOR: Job failed (spool failed)";
 257   job_handler_message_loop_proxy_->PostTask(
 258       FROM_HERE, base::Bind(&PrinterJobHandler::JobFailed, this, JOB_FAILED));
 259 }
 260
 261 // static
 262 void PrinterJobHandler::ReportsStats() {
 263   base::subtle::Atomic32 started =
 264       base::subtle::NoBarrier_AtomicExchange(&g_total_jobs_started, 0);
 265   base::subtle::Atomic32 done =
 266       base::subtle::NoBarrier_AtomicExchange(&g_total_jobs_done, 0);
 267   UMA_HISTOGRAM_COUNTS_100("CloudPrint.JobsStartedPerInterval", started);
 268   UMA_HISTOGRAM_COUNTS_100("CloudPrint.JobsDonePerInterval", done);
 269 }
 270
 271 PrinterJobHandler::~PrinterJobHandler() {
 272   if (printer_watcher_.get())
 273     printer_watcher_->StopWatching();
 274 }
 275
 276 // Begin Response handlers
 277 CloudPrintURLFetcher::ResponseAction
 278 PrinterJobHandler::HandlePrinterUpdateResponse(
 279     const net::URLFetcher* source,
 280     const GURL& url,
 281     DictionaryValue* json_data,
 282     bool succeeded) {
 283   VLOG(1) << "CP_CONNECTOR: Handling printer update response"
 284           << ", printer id: " << printer_info_cloud_.printer_id;
 285   // We are done here. Go to the Stop state
 286   VLOG(1) << "CP_CONNECTOR: Stopping printer job handler"
 287           << ", printer id: " << printer_info_cloud_.printer_id;
 288   base::MessageLoop::current()->PostTask(
 289       FROM_HERE, base::Bind(&PrinterJobHandler::Stop, this));
 290   return CloudPrintURLFetcher::STOP_PROCESSING;
 291 }
 292
 293 CloudPrintURLFetcher::ResponseAction
 294 PrinterJobHandler::HandleJobMetadataResponse(
 295     const net::URLFetcher* source,
 296     const GURL& url,
 297     DictionaryValue* json_data,
 298     bool succeeded) {
 299   VLOG(1) << "CP_CONNECTOR: Handling job metadata response"
 300           << ", printer id: " << printer_info_cloud_.printer_id;
 301   bool job_available = false;
 302   if (succeeded) {
 303     std::vector<JobDetails> jobs;
 304     job_queue_handler_.GetJobsFromQueue(json_data, &jobs);
 305     if (!jobs.empty()) {
 306       if (jobs[0].time_remaining_ == base::TimeDelta()) {
 307         job_available = true;
 308         job_details_ = jobs[0];
 309         job_start_time_ = base::Time::Now();
 310         base::subtle::NoBarrier_AtomicIncrement(&g_total_jobs_started, 1);
 311         UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 312                                   JOB_HANDLER_JOB_STARTED, JOB_HANDLER_MAX);
 313         SetNextDataHandler(&PrinterJobHandler::HandlePrintTicketResponse);
 314         request_ = CloudPrintURLFetcher::Create();
 315         request_->StartGetRequest(CloudPrintURLFetcher::REQUEST_TICKET,
 316             GURL(job_details_.print_ticket_url_), this, kJobDataMaxRetryCount,
 317             std::string());
 318       } else {
 319         job_available = false;
 320         base::MessageLoop::current()->PostDelayedTask(
 321             FROM_HERE,
 322             base::Bind(&PrinterJobHandler::RunScheduledJobCheck, this),
 323             jobs[0].time_remaining_);
 324       }
 325     }
 326   }
 327
 328   if (!job_available) {
 329     // If no jobs are available, go to the Stop state.
 330     VLOG(1) << "CP_CONNECTOR: Stopping printer job handler"
 331             << ", printer id: " << printer_info_cloud_.printer_id;
 332     base::MessageLoop::current()->PostTask(
 333         FROM_HERE, base::Bind(&PrinterJobHandler::Stop, this));
 334   }
 335   return CloudPrintURLFetcher::STOP_PROCESSING;
 336 }
 337
 338 CloudPrintURLFetcher::ResponseAction
 339 PrinterJobHandler::HandlePrintTicketResponse(const net::URLFetcher* source,
 340                                              const GURL& url,
 341                                              const std::string& data) {
 342   VLOG(1) << "CP_CONNECTOR: Handling print ticket response"
 343           << ", printer id: " << printer_info_cloud_.printer_id;
 344   if (print_system_->ValidatePrintTicket(printer_info_.printer_name, data)) {
 345     UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 346                               JOB_HANDLER_VALID_TICKET, JOB_HANDLER_MAX);
 347     job_details_.print_ticket_ = data;
 348     SetNextDataHandler(&PrinterJobHandler::HandlePrintDataResponse);
 349     request_ = CloudPrintURLFetcher::Create();
 350     std::string accept_headers = "Accept: ";
 351     accept_headers += print_system_->GetSupportedMimeTypes();
 352     request_->StartGetRequest(CloudPrintURLFetcher::REQUEST_DATA,
 353         GURL(job_details_.print_data_url_), this, kJobDataMaxRetryCount,
 354         accept_headers);
 355   } else {
 356     UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 357                               JOB_HANDLER_INVALID_TICKET, JOB_HANDLER_MAX);
 358     // The print ticket was not valid. We are done here.
 359     ValidatePrintTicketFailed();
 360   }
 361   return CloudPrintURLFetcher::STOP_PROCESSING;
 362 }
 363
 364 CloudPrintURLFetcher::ResponseAction
 365 PrinterJobHandler::HandlePrintDataResponse(const net::URLFetcher* source,
 366                                            const GURL& url,
 367                                            const std::string& data) {
 368   VLOG(1) << "CP_CONNECTOR: Handling print data response"
 369           << ", printer id: " << printer_info_cloud_.printer_id;
 370   if (file_util::CreateTemporaryFile(&job_details_.print_data_file_path_)) {
 371     UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent", JOB_HANDLER_DATA,
 372                               JOB_HANDLER_MAX);
 373     int ret = file_util::WriteFile(job_details_.print_data_file_path_,
 374                                    data.c_str(), data.length());
 375     source->GetResponseHeaders()->GetMimeType(
 376         &job_details_.print_data_mime_type_);
 377     DCHECK(ret == static_cast<int>(data.length()));
 378     if (ret == static_cast<int>(data.length())) {
 379       UpdateJobStatus(PRINT_JOB_STATUS_IN_PROGRESS, JOB_SUCCESS);
 380       return CloudPrintURLFetcher::STOP_PROCESSING;
 381     }
 382   }
 383   UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 384                             JOB_HANDLER_INVALID_DATA, JOB_HANDLER_MAX);
 385
 386   // If we are here, then there was an error in saving the print data, bail out
 387   // here.
 388   VLOG(1) << "CP_CONNECTOR: Error saving print data"
 389           << ", printer id: " << printer_info_cloud_.printer_id;
 390   base::MessageLoop::current()->PostTask(
 391       FROM_HERE, base::Bind(&PrinterJobHandler::JobFailed, this,
 392                             JOB_DOWNLOAD_FAILED));
 393   return CloudPrintURLFetcher::STOP_PROCESSING;
 394 }
 395
 396 CloudPrintURLFetcher::ResponseAction
 397 PrinterJobHandler::HandleInProgressStatusUpdateResponse(
 398     const net::URLFetcher* source,
 399     const GURL& url,
 400     DictionaryValue* json_data,
 401     bool succeeded) {
 402   VLOG(1) << "CP_CONNECTOR: Handling success status update response"
 403           << ", printer id: " << printer_info_cloud_.printer_id;
 404   base::MessageLoop::current()->PostTask(
 405       FROM_HERE, base::Bind(&PrinterJobHandler::StartPrinting, this));
 406   return CloudPrintURLFetcher::STOP_PROCESSING;
 407 }
 408
 409 CloudPrintURLFetcher::ResponseAction
 410 PrinterJobHandler::HandleFailureStatusUpdateResponse(
 411     const net::URLFetcher* source,
 412     const GURL& url,
 413     DictionaryValue* json_data,
 414     bool succeeded) {
 415   VLOG(1) << "CP_CONNECTOR: Handling failure status update response"
 416           << ", printer id: " << printer_info_cloud_.printer_id;
 417   base::MessageLoop::current()->PostTask(
 418       FROM_HERE, base::Bind(&PrinterJobHandler::Stop, this));
 419   return CloudPrintURLFetcher::STOP_PROCESSING;
 420 }
 421
 422 void PrinterJobHandler::Start() {
 423   VLOG(1) << "CP_CONNECTOR: Starting printer job handler"
 424           << ", printer id: " << printer_info_cloud_.printer_id
 425           << ", task in progress: " << task_in_progress_;
 426   UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 427                             JOB_HANDLER_START, JOB_HANDLER_MAX);
 428   if (task_in_progress_) {
 429     // Multiple Starts can get posted because of multiple notifications
 430     // We want to ignore the other ones that happen when a task is in progress.
 431     return;
 432   }
 433   Reset();
 434   if (!shutting_down_) {
 435     // Check if we have work to do.
 436     if (HavePendingTasks()) {
 437       UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 438                                 JOB_HANDLER_PENDING_TASK, JOB_HANDLER_MAX);
 439       if (!task_in_progress_ && printer_update_pending_) {
 440         UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 441                                   JOB_HANDLER_PRINTER_UPDATE, JOB_HANDLER_MAX);
 442         printer_update_pending_ = false;
 443         task_in_progress_ = UpdatePrinterInfo();
 444         VLOG(1) << "CP_CONNECTOR: Changed task in progress"
 445                 << ", printer id: " << printer_info_cloud_.printer_id
 446                 << ", task in progress: " << task_in_progress_;
 447       }
 448       if (!task_in_progress_ && job_check_pending_) {
 449         UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 450                                   JOB_HANDLER_JOB_CHECK, JOB_HANDLER_MAX);
 451         task_in_progress_ = true;
 452         VLOG(1) << "CP_CONNECTOR: Changed task in progress"
 453                 ", printer id: " << printer_info_cloud_.printer_id
 454                 << ", task in progress: " << task_in_progress_;
 455         job_check_pending_ = false;
 456         // We need to fetch any pending jobs for this printer
 457         SetNextJSONHandler(&PrinterJobHandler::HandleJobMetadataResponse);
 458         request_ = CloudPrintURLFetcher::Create();
 459         request_->StartGetRequest(
 460             CloudPrintURLFetcher::REQUEST_JOB_FETCH,
 461             GetUrlForJobFetch(
 462                 cloud_print_server_url_, printer_info_cloud_.printer_id,
 463                 job_fetch_reason_),
 464             this,
 465             kCloudPrintAPIMaxRetryCount,
 466             std::string());
 467         last_job_fetch_time_ = base::TimeTicks::Now();
 468         VLOG(1) << "CP_CONNECTOR: Last job fetch time"
 469                 << ", printer name: " << printer_info_.printer_name.c_str()
 470                 << ", timestamp: " << last_job_fetch_time_.ToInternalValue();
 471         job_fetch_reason_.clear();
 472       }
 473     }
 474   }
 475 }
 476
 477 void PrinterJobHandler::Stop() {
 478   VLOG(1) << "CP_CONNECTOR: Stopping printer job handler"
 479           << ", printer id: " << printer_info_cloud_.printer_id;
 480   task_in_progress_ = false;
 481   VLOG(1) << "CP_CONNECTOR: Changed task in progress"
 482           << ", printer id: " << printer_info_cloud_.printer_id
 483           << ", task in progress: " << task_in_progress_;
 484   Reset();
 485   if (HavePendingTasks()) {
 486     base::MessageLoop::current()->PostTask(
 487         FROM_HERE, base::Bind(&PrinterJobHandler::Start, this));
 488   }
 489 }
 490
 491 void PrinterJobHandler::StartPrinting() {
 492   VLOG(1) << "CP_CONNECTOR: Starting printing"
 493           << ", printer id: " << printer_info_cloud_.printer_id;
 494   UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 495                             JOB_HANDLER_SET_START_PRINTING, JOB_HANDLER_MAX);
 496   // We are done with the request object for now.
 497   request_ = NULL;
 498   if (!shutting_down_) {
 499     if (!print_thread_.Start()) {
 500       VLOG(1) << "CP_CONNECTOR: Failed to start print thread"
 501               << ", printer id: " << printer_info_cloud_.printer_id;
 502       JobFailed(JOB_FAILED);
 503     } else {
 504       print_thread_.message_loop()->PostTask(
 505           FROM_HERE, base::Bind(&PrinterJobHandler::DoPrint, this, job_details_,
 506                                 printer_info_.printer_name));
 507     }
 508   }
 509 }
 510
 511 void PrinterJobHandler::Reset() {
 512   job_details_.Clear();
 513   request_ = NULL;
 514   print_thread_.Stop();
 515 }
 516
 517 void PrinterJobHandler::UpdateJobStatus(PrintJobStatus status,
 518                                         PrintJobError error) {
 519   VLOG(1) << "CP_CONNECTOR: Updating job status"
 520           << ", printer id: " << printer_info_cloud_.printer_id
 521           << ", job id: " << job_details_.job_id_
 522           << ", job status: " << status;
 523   if (shutting_down_) {
 524     VLOG(1) << "CP_CONNECTOR: Job status update aborted (shutting down)"
 525             << ", printer id: " << printer_info_cloud_.printer_id
 526             << ", job id: " << job_details_.job_id_;
 527     return;
 528   }
 529   if (job_details_.job_id_.empty()) {
 530     VLOG(1) << "CP_CONNECTOR: Job status update aborted (empty job id)"
 531             << ", printer id: " << printer_info_cloud_.printer_id;
 532     return;
 533   }
 534
 535   UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobStatus", error, JOB_MAX);
 536
 537   if (error == JOB_SUCCESS) {
 538     DCHECK_EQ(status, PRINT_JOB_STATUS_IN_PROGRESS);
 539     UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 540                               JOB_HANDLER_SET_IN_PROGRESS, JOB_HANDLER_MAX);
 541     SetNextJSONHandler(
 542         &PrinterJobHandler::HandleInProgressStatusUpdateResponse);
 543   } else {
 544     SetNextJSONHandler(
 545         &PrinterJobHandler::HandleFailureStatusUpdateResponse);
 546   }
 547   request_ = CloudPrintURLFetcher::Create();
 548   request_->StartGetRequest(
 549       CloudPrintURLFetcher::REQUEST_UPDATE_JOB,
 550       GetUrlForJobStatusUpdate(cloud_print_server_url_, job_details_.job_id_,
 551                                status, error),
 552       this, kCloudPrintAPIMaxRetryCount, std::string());
 553 }
 554
 555 void PrinterJobHandler::RunScheduledJobCheck() {
 556   CheckForJobs(kJobFetchReasonRetry);
 557 }
 558
 559 void PrinterJobHandler::SetNextJSONHandler(JSONDataHandler handler) {
 560   next_json_data_handler_ = handler;
 561   next_data_handler_ = NULL;
 562 }
 563
 564 void PrinterJobHandler::SetNextDataHandler(DataHandler handler) {
 565   next_data_handler_ = handler;
 566   next_json_data_handler_ = NULL;
 567 }
 568
 569 void PrinterJobHandler::JobFailed(PrintJobError error) {
 570   VLOG(1) << "CP_CONNECTOR: Job failed"
 571           << ", printer id: " << printer_info_cloud_.printer_id
 572           << ", job id: " << job_details_.job_id_
 573           << ", error: " << error;
 574   if (!shutting_down_) {
 575     UpdateJobStatus(PRINT_JOB_STATUS_ERROR, error);
 576     // This job failed, but others may be pending.  Schedule a check.
 577     job_check_pending_ = true;
 578     job_fetch_reason_ = kJobFetchReasonFailure;
 579   }
 580 }
 581
 582 void PrinterJobHandler::JobSpooled(PlatformJobId local_job_id) {
 583   VLOG(1) << "CP_CONNECTOR: Job spooled"
 584           << ", printer id: " << printer_info_cloud_.printer_id
 585           << ", job id: " << local_job_id;
 586   UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent", JOB_HANDLER_SPOOLED,
 587                             JOB_HANDLER_MAX);
 588   UMA_HISTOGRAM_LONG_TIMES("CloudPrint.SpoolingTime",
 589                            base::Time::Now() - spooling_start_time_);
 590   if (shutting_down_)
 591     return;
 592
 593   local_job_id_ = local_job_id;
 594   print_thread_.Stop();
 595
 596   // The print job has been spooled locally. We now need to create an object
 597   // that monitors the status of the job and updates the server.
 598   scoped_refptr<JobStatusUpdater> job_status_updater(
 599       new JobStatusUpdater(printer_info_.printer_name, job_details_.job_id_,
 600                             local_job_id_, cloud_print_server_url_,
 601                             print_system_.get(), this));
 602   job_status_updater_list_.push_back(job_status_updater);
 603   base::MessageLoop::current()->PostTask(
 604       FROM_HERE,
 605       base::Bind(&JobStatusUpdater::UpdateStatus, job_status_updater.get()));
 606
 607   CheckForJobs(kJobFetchReasonQueryMore);
 608
 609   VLOG(1) << "CP_CONNECTOR: Stopping printer job handler"
 610           << ", printer id: " << printer_info_cloud_.printer_id;
 611   base::MessageLoop::current()->PostTask(
 612       FROM_HERE, base::Bind(&PrinterJobHandler::Stop, this));
 613 }
 614
 615 bool PrinterJobHandler::UpdatePrinterInfo() {
 616   if (!printer_watcher_.get()) {
 617     LOG(ERROR) << "CP_CONNECTOR: Printer watcher is missing."
 618                << " Check printer server url for printer id: "
 619                << printer_info_cloud_.printer_id;
 620     return false;
 621   }
 622
 623   VLOG(1) << "CP_CONNECTOR: Updating printer info"
 624           << ", printer id: " << printer_info_cloud_.printer_id;
 625   // We need to update the parts of the printer info that have changed
 626   // (could be printer name, description, status or capabilities).
 627   // First asynchronously fetch the capabilities.
 628   printing::PrinterBasicInfo printer_info;
 629   printer_watcher_->GetCurrentPrinterInfo(&printer_info);
 630
 631   // Asynchronously fetch the printer caps and defaults. The story will
 632   // continue in OnReceivePrinterCaps.
 633   print_system_->GetPrinterCapsAndDefaults(
 634       printer_info.printer_name.c_str(),
 635       base::Bind(&PrinterJobHandler::OnReceivePrinterCaps,
 636                  weak_ptr_factory_.GetWeakPtr()));
 637
 638   // While we are waiting for the data, pretend we have work to do and return
 639   // true.
 640   return true;
 641 }
 642
 643 bool PrinterJobHandler::HavePendingTasks() {
 644   return (job_check_pending_ || printer_update_pending_);
 645 }
 646
 647 void PrinterJobHandler::ValidatePrintTicketFailed() {
 648   if (!shutting_down_) {
 649     LOG(ERROR) << "CP_CONNECTOR: Failed validating print ticket"
 650                << ", printer name: " << printer_info_.printer_name
 651                << ", job id: " << job_details_.job_id_;
 652     JobFailed(JOB_VALIDATE_TICKET_FAILED);
 653   }
 654 }
 655
 656 void PrinterJobHandler::OnReceivePrinterCaps(
 657     bool succeeded,
 658     const std::string& printer_name,
 659     const printing::PrinterCapsAndDefaults& caps_and_defaults) {
 660   printing::PrinterBasicInfo printer_info;
 661   if (printer_watcher_.get())
 662     printer_watcher_->GetCurrentPrinterInfo(&printer_info);
 663
 664   std::string post_data;
 665   std::string mime_boundary;
 666   CreateMimeBoundaryForUpload(&mime_boundary);
 667
 668   if (succeeded) {
 669     std::string caps_hash =
 670         base::MD5String(caps_and_defaults.printer_capabilities);
 671     if (caps_hash != printer_info_cloud_.caps_hash) {
 672       // Hashes don't match, we need to upload new capabilities (the defaults
 673       // go for free along with the capabilities)
 674       printer_info_cloud_.caps_hash = caps_hash;
 675       net::AddMultipartValueForUpload(kPrinterCapsValue,
 676           caps_and_defaults.printer_capabilities, mime_boundary,
 677           caps_and_defaults.caps_mime_type, &post_data);
 678       net::AddMultipartValueForUpload(kPrinterDefaultsValue,
 679           caps_and_defaults.printer_defaults, mime_boundary,
 680           caps_and_defaults.defaults_mime_type, &post_data);
 681       net::AddMultipartValueForUpload(kPrinterCapsHashValue,
 682           caps_hash, mime_boundary, std::string(), &post_data);
 683     }
 684   } else {
 685     LOG(ERROR) << "Failed to get printer caps and defaults"
 686                << ", printer name: " << printer_name;
 687   }
 688
 689   std::string tags_hash = GetHashOfPrinterInfo(printer_info);
 690   if (tags_hash != printer_info_cloud_.tags_hash) {
 691     printer_info_cloud_.tags_hash = tags_hash;
 692     post_data += GetPostDataForPrinterInfo(printer_info, mime_boundary);
 693     // Remove all the existing proxy tags.
 694     std::string cp_tag_wildcard(kCloudPrintServiceProxyTagPrefix);
 695     cp_tag_wildcard += ".*";
 696     net::AddMultipartValueForUpload(kPrinterRemoveTagValue,
 697         cp_tag_wildcard, mime_boundary, std::string(), &post_data);
 698
 699     if (!last_caps_update_time_.is_null()) {
 700       UMA_HISTOGRAM_CUSTOM_TIMES(
 701           "CloudPrint.CapsUpdateInterval",
 702           base::Time::Now() - last_caps_update_time_,
 703           base::TimeDelta::FromMilliseconds(1),
 704           base::TimeDelta::FromDays(30), 50);
 705     }
 706     last_caps_update_time_ = base::Time::Now();
 707   }
 708
 709   if (printer_info.printer_name != printer_info_.printer_name) {
 710     net::AddMultipartValueForUpload(kPrinterNameValue,
 711         printer_info.printer_name, mime_boundary, std::string(), &post_data);
 712   }
 713   if (printer_info.printer_description != printer_info_.printer_description) {
 714     net::AddMultipartValueForUpload(kPrinterDescValue,
 715       printer_info.printer_description, mime_boundary,
 716       std::string(), &post_data);
 717   }
 718   if (printer_info.printer_status != printer_info_.printer_status) {
 719     net::AddMultipartValueForUpload(kPrinterStatusValue,
 720         base::StringPrintf("%d", printer_info.printer_status), mime_boundary,
 721         std::string(), &post_data);
 722   }
 723
 724   // Add local_settings with a current XMPP ping interval.
 725   if (printer_info_cloud_.pending_xmpp_timeout != 0) {
 726     DCHECK(kMinXmppPingTimeoutSecs <= printer_info_cloud_.pending_xmpp_timeout);
 727     net::AddMultipartValueForUpload(kPrinterLocalSettingsValue,
 728         base::StringPrintf(kUpdateLocalSettingsXmppPingFormat,
 729             printer_info_cloud_.current_xmpp_timeout),
 730         mime_boundary, std::string(), &post_data);
 731   }
 732
 733   printer_info_ = printer_info;
 734   if (!post_data.empty()) {
 735     net::AddMultipartFinalDelimiterForUpload(mime_boundary, &post_data);
 736     std::string mime_type("multipart/form-data; boundary=");
 737     mime_type += mime_boundary;
 738     SetNextJSONHandler(&PrinterJobHandler::HandlePrinterUpdateResponse);
 739     request_ = CloudPrintURLFetcher::Create();
 740     request_->StartPostRequest(
 741         CloudPrintURLFetcher::REQUEST_UPDATE_PRINTER,
 742         GetUrlForPrinterUpdate(
 743             cloud_print_server_url_, printer_info_cloud_.printer_id),
 744         this,
 745         kCloudPrintAPIMaxRetryCount,
 746         mime_type,
 747         post_data,
 748         std::string());
 749   } else {
 750     // We are done here. Go to the Stop state
 751     VLOG(1) << "CP_CONNECTOR: Stopping printer job handler"
 752             << ", printer name: " << printer_name;
 753     base::MessageLoop::current()->PostTask(
 754         FROM_HERE, base::Bind(&PrinterJobHandler::Stop, this));
 755   }
 756 }
 757
 758 // The following methods are called on |print_thread_|. It is not safe to
 759 // access any members other than |job_handler_message_loop_proxy_|,
 760 // |job_spooler_| and |print_system_|.
 761 void PrinterJobHandler::DoPrint(const JobDetails& job_details,
 762                                 const std::string& printer_name) {
 763   job_spooler_ = print_system_->CreateJobSpooler();
 764   UMA_HISTOGRAM_LONG_TIMES("CloudPrint.PrepareTime",
 765                            base::Time::Now() - job_start_time_);
 766   DCHECK(job_spooler_.get());
 767   if (!job_spooler_.get())
 768     return;
 769   string16 document_name =
 770       printing::PrintBackend::SimplifyDocumentTitle(
 771           UTF8ToUTF16(job_details.job_title_));
 772   if (document_name.empty()) {
 773     document_name = printing::PrintBackend::SimplifyDocumentTitle(
 774         l10n_util::GetStringUTF16(IDS_DEFAULT_PRINT_DOCUMENT_TITLE));
 775   }
 776   UMA_HISTOGRAM_ENUMERATION("CloudPrint.JobHandlerEvent",
 777                             JOB_HANDLER_START_SPOOLING, JOB_HANDLER_MAX);
 778   spooling_start_time_ = base::Time::Now();
 779   if (!job_spooler_->Spool(job_details.print_ticket_,
 780                            job_details.print_data_file_path_,
 781                            job_details.print_data_mime_type_,
 782                            printer_name,
 783                            UTF16ToUTF8(document_name),
 784                            job_details.tags_,
 785                            this)) {
 786     OnJobSpoolFailed();
 787   }
 788 }
 789
 790 }  // namespace cloud_print