Add Chrome To Mobile Service and Views Page Action.

chrome/browser/chrome_to_mobile_service.cc

Index: chrome/browser/chrome_to_mobile_service.cc
diff --git a/chrome/browser/chrome_to_mobile_service.cc b/chrome/browser/chrome_to_mobile_service.cc
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+// 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 "chrome/browser/chrome_to_mobile_service.h"
+
+#include "base/bind.h"
+#include "base/json/json_writer.h"
+#include "base/stringprintf.h"
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/app/chrome_command_ids.h"
+#include "chrome/common/cloud_print/cloud_print_helpers.h"
+#include "chrome/browser/printing/cloud_print/cloud_print_url.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/signin/token_service.h"
+#include "chrome/browser/signin/token_service_factory.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/common/guid.h"
+#include "chrome/common/net/gaia/gaia_urls.h"
+#include "chrome/common/net/gaia/oauth2_access_token_fetcher.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/common/url_fetcher.h"
+#include "net/base/escape.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace {
+
+// The URLFetcher max number of retries.
+size_t kMaxRetries = 10;
+
+// The request retry delays in seconds.
+int kAuthRetryDelay = 30;
+int kAutoSearchRetryDelay = 300;
+
+const char kOAuth2Scope[] = "https://www.googleapis.com/auth/cloudprint";
+const char kMobileTypeAndroidChromeSnapshot[] = "ANDROID_CHROME_SNAPSHOT";
+
+const char kJobTypeURL[] = "url";
+const char kJobTypeDelayedSnapshot[] = "url_with_delayed_snapshot";
+const char kJobTypeSnapshot[] = "snapshot";
+
+std::string GetJobString(const internal::SubmitData& data) {
+  scoped_ptr<DictionaryValue> job(new DictionaryValue());
+  job->SetString("url", data.url.spec());
+  if (data.job_type == internal::URL) {
+    job->SetString("type", kJobTypeURL);
+  } else {
+    job->SetString("snapID", data.snapshot_id);
+    job->SetString("type", (data.job_type == internal::SNAPSHOT) ?
+        kJobTypeSnapshot : kJobTypeDelayedSnapshot);
+  }
+  std::string job_string;
+  base::JSONWriter::Write(job.get(), false, &job_string);
+  return job_string;
+}
+
+GURL GetSubmitURL(GURL service_url, const internal::SubmitData& data) {
+  GURL submit_url = cloud_print::GetUrlForSubmit(service_url);
+  if (data.job_type == internal::SNAPSHOT)
+    return submit_url;
+
+  // Append form data to the URL's query for |URL| and |DELAYED_SNAPSHOT| jobs.
+  static const bool kUsePlus = true;
+  std::string tag_string = net::EscapeQueryParamValue(
+      "__c2dm__job_data=" + GetJobString(data), kUsePlus);
+  GURL::Replacements replacements;
+  // Provide dummy content to workaround |errorCode| 412 'Document missing'.
+  std::string query = StringPrintf("printerid=%s&tag=%s&title=%s"
+      "&contentType=text/plain&content=dummy",
+      net::EscapeQueryParamValue(UTF16ToUTF8(data.mobile_id), kUsePlus).c_str(),
+      net::EscapeQueryParamValue(tag_string, kUsePlus).c_str(),
+      net::EscapeQueryParamValue(UTF16ToUTF8(data.title), kUsePlus).c_str());
+  replacements.SetQueryStr(query);
+  return submit_url.ReplaceComponents(replacements);
+}
+
+void DeleteFilePath(const FilePath& file_path) {
+  bool success = file_util::Delete(file_path, false);
+  DCHECK(success);
+}
+
+void SubmitSnapshot(content::URLFetcher* request,
+                    const internal::SubmitData& data) {
+  std::string file;
+  if (file_util::ReadFileToString(data.snapshot_path, &file) && !file.empty()) {
+    std::string post_data, mime_boundary;
+    cloud_print::CreateMimeBoundaryForUpload(&mime_boundary);
+    cloud_print::AddMultipartValueForUpload("printerid",
+        UTF16ToUTF8(data.mobile_id), mime_boundary, std::string(), &post_data);
+    cloud_print::AddMultipartValueForUpload("tag", "__c2dm__job_data=" +
+        GetJobString(data), mime_boundary, std::string(), &post_data);
+    cloud_print::AddMultipartValueForUpload("title", UTF16ToUTF8(data.title),
+        mime_boundary, std::string(), &post_data);
+    cloud_print::AddMultipartValueForUpload("contentType", "multipart/related",
+        mime_boundary, std::string(), &post_data);
+
+    // Append the snapshot MHTML content and terminate the request body.
+    post_data.append("--" + mime_boundary + "\r\n"
+        "Content-Disposition: form-data; "
+        "name=\"content\"; filename=\"blob\"\r\n"
+        "Content-Type: text/mhtml\r\n"
+        "\r\n" + file + "\r\n" "--" + mime_boundary + "--\r\n");
+    std::string content_type = "multipart/form-data; boundary=" + mime_boundary;
+    request->SetUploadData(content_type, post_data);
+    request->Start();
+  }
+
+  content::BrowserThread::PostBlockingPoolTask(FROM_HERE,
+      base::Bind(&DeleteFilePath, data.snapshot_path));
+}
+
+}  // namespace
+
+namespace internal {
+
+SubmitData::SubmitData() {}
+
+SubmitData::~SubmitData() {}
+
+}
+
+ChromeToMobileService::ChromeToMobileService(Profile* profile)
+    : profile_(profile),
+      cloud_print_url_(new CloudPrintURL(profile)) {
+  RequestMobileListUpdate();
+}
+
+ChromeToMobileService::~ChromeToMobileService() {}
+
+void ChromeToMobileService::OnURLFetchComplete(
+    const content::URLFetcher* source) {
+  if (source == search_request_.get())
+    HandleSearchResponse();
+  else
+    HandleSubmitResponse(source);
+}
+
+void ChromeToMobileService::OnGetTokenSuccess(
+    const std::string& access_token) {
+  oauth2_request_.reset();
+  request_timer_.Stop();
+  oauth2_token_ = access_token;
+  RequestSearch();
+}
+
+void ChromeToMobileService::OnGetTokenFailure(
+    const GoogleServiceAuthError& error) {
+  oauth2_request_.reset();
+  request_timer_.Start(FROM_HERE, base::TimeDelta::FromSeconds(kAuthRetryDelay),
+                       this, &ChromeToMobileService::RequestAuth);
+}
+
+void ChromeToMobileService::RequestMobileListUpdate() {
+  if (oauth2_token_.empty())
+    RequestAuth();
+  else
+    RequestSearch();
+}
+
+void ChromeToMobileService::SendToMobile(const string16& printer_id,
+                                         const GURL& url,
+                                         const string16& title,
+                                         const FilePath& snapshot,
+                                         base::WeakPtr<Observer> observer) {
+  if (oauth2_token_.empty() || !url.is_valid())
+    return;
+
+  bool send_snapshot = !snapshot.empty();
+  std::string id = send_snapshot ? guid::GenerateGUID() : std::string();
+  internal::SubmitData data;
+  data.mobile_id = printer_id;
+  data.url = url;
+  data.title = title;
+  data.snapshot_path = snapshot;
+  data.snapshot_id = id;
+  data.job_type = send_snapshot ? internal::DELAYED_SNAPSHOT : internal::URL;
+  content::URLFetcher* submit_url = CreateRequest(data);
+  request_observer_map_[submit_url] = observer;
+  submit_url->Start();
+  if (send_snapshot) {
+    data.job_type = internal::SNAPSHOT;
+    content::URLFetcher* submit_snapshot = CreateRequest(data);
+    request_observer_map_[submit_snapshot] = observer;
+    content::BrowserThread::PostBlockingPoolTask(FROM_HERE,
+      base::Bind(&SubmitSnapshot, submit_snapshot, data));
+  }
+}
+
+content::URLFetcher* ChromeToMobileService::CreateRequest(
+    const internal::SubmitData& data) {
+  bool get = data.job_type != internal::SNAPSHOT;
+  content::URLFetcher* request = content::URLFetcher::Create(
+    GetSubmitURL(cloud_print_url_->GetCloudPrintServiceURL(), data),
+    get ? content::URLFetcher::GET : content::URLFetcher::POST, this);
+  request->SetRequestContext(profile_->GetRequestContext());
+  request->SetMaxRetries(kMaxRetries);
+  request->SetExtraRequestHeaders("Authorization: OAuth " +
+      oauth2_token_ + "\r\n" + cloud_print::kChromeCloudPrintProxyHeader);
+  return request;
+}
+
+void ChromeToMobileService::RequestAuth() {
+  if (oauth2_request_.get() || !oauth2_token_.empty())
+    return;
+
+  GURL auth_url = cloud_print::GetUrlForGetAuthCode(
+      cloud_print_url_->GetCloudPrintServiceURL(),
+      cloud_print::kDefaultCloudPrintOAuthClientId,
+      cloud_print::GenerateProxyId());
+  oauth2_request_.reset(
+      new OAuth2AccessTokenFetcher(this, profile_->GetRequestContext()));
+  std::string token = TokenServiceFactory::GetForProfile(profile_)->
+                          GetOAuth2LoginRefreshToken();
+  std::vector<std::string> scopes(1, kOAuth2Scope);
+  oauth2_request_->Start(GaiaUrls::GetInstance()->oauth2_chrome_client_id(),
+      GaiaUrls::GetInstance()->oauth2_chrome_client_secret(), token, scopes);
+}
+
+void ChromeToMobileService::RequestSearch() {
+  if (search_request_.get() || oauth2_token_.empty())
+    return;
+
+  GURL search_url =
+      cloud_print::GetUrlForSearch(cloud_print_url_->GetCloudPrintServiceURL());
+  search_request_.reset(
+    content::URLFetcher::Create(search_url, content::URLFetcher::GET, this));
+  search_request_->SetRequestContext(profile_->GetRequestContext());
+  search_request_->SetMaxRetries(kMaxRetries);
+  search_request_->SetExtraRequestHeaders("Authorization: OAuth " +
+      oauth2_token_ + "\r\n" + cloud_print::kChromeCloudPrintProxyHeader);
+  search_request_->Start();
+}
+
+void ChromeToMobileService::HandleSearchResponse() {
+  std::string data;
+  search_request_->GetResponseAsString(&data);
+  search_request_.reset();
+
+  DictionaryValue* json_data = NULL;
+  ListValue* list = NULL;
+  cloud_print::ParseResponseJSON(data, NULL, &json_data);
+  if (json_data && json_data->GetList(cloud_print::kPrinterListValue, &list)) {
+    mobiles_.clear();
+    for (size_t index = 0; index < list->GetSize(); index++) {
+      DictionaryValue* mobile_data = NULL;
+      if (list->GetDictionary(index, &mobile_data)) {
+        std::string mobile_type;
+        mobile_data->GetString("type", &mobile_type);
+        if (mobile_type.compare(kMobileTypeAndroidChromeSnapshot) == 0)
+          mobiles_.push_back(mobile_data);
+      }
+    }
+  }
+
+  BrowserList::GetLastActiveWithProfile(profile_)->command_updater()->
+      UpdateCommandEnabled(IDC_CHROME_TO_MOBILE_PAGE, !mobiles_.empty());
+
+  if (!request_timer_.IsRunning())
+    request_timer_.Start(FROM_HERE,
+                         base::TimeDelta::FromSeconds(kAutoSearchRetryDelay),
+                         this, &ChromeToMobileService::RequestSearch);
+}
+
+void ChromeToMobileService::HandleSubmitResponse(
+    const content::URLFetcher* source) {
+  // Get the observer for this response; bail if there is none or it is NULL.
+  RequestObserverMap::iterator i = request_observer_map_.find(source);
+  if (i == request_observer_map_.end())
+    return;
+  base::WeakPtr<Observer> observer = i->second;
+  request_observer_map_.erase(i);
+  if (!observer.get())
+    return;
+
+  // Get the success value from the CloudPrint server response data.
+  std::string data;
+  source->GetResponseAsString(&data);
+  DictionaryValue* json_data = NULL;
+  cloud_print::ParseResponseJSON(data, NULL, &json_data);
+  bool success = false;
+  if (json_data)
+    json_data->GetBoolean("success", &success);
+
+  // Check if the observer is waiting on a second response (url and snapshot).
+  RequestObserverMap::iterator other = request_observer_map_.begin();
+  for (; other != request_observer_map_.end(); ++other) {
+    if (other->second == observer) {
+      // Do not call OnSendComplete for observers waiting on a second response.
+      if (success)
+        return;
+
+      // Ensure a second response is not sent after reporting failure below.
+      request_observer_map_.erase(other);
+      break;
+    }
+  }
+
+  observer->OnSendComplete(success);
+}