Add authentication support to AttachmentUploaderImpl.

sync/internal_api/attachments/attachment_uploader_impl.cc

 // Copyright 2014 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 "sync/internal_api/public/attachments/attachment_uploader_impl.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/non_thread_safe.h"
+#include "google_apis/gaia/gaia_constants.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_fetcher_delegate.h"
 #include "sync/api/attachments/attachment.h"
 #include "sync/protocol/sync.pb.h"
 #include "url/gurl.h"
 
 namespace {
 
 const char kContentType[] = "application/octet-stream";
 
 }  // namespace
 
 namespace syncer {
 
 // Encapsulates all the state associated with a single upload.
 class AttachmentUploaderImpl::UploadState : public net::URLFetcherDelegate,
+                                            public OAuth2TokenService::Consumer,
                                             public base::NonThreadSafe {
  public:
   // Construct an UploadState.
   //
   // |owner| is a pointer to the object that will own (and must outlive!) this
   // |UploadState.
-  UploadState(const GURL& upload_url,
-              const scoped_refptr<net::URLRequestContextGetter>&
-                  url_request_context_getter,
-              const Attachment& attachment,
-              const UploadCallback& user_callback,
-              AttachmentUploaderImpl* owner);
+  UploadState(
+      const GURL& upload_url,
+      const scoped_refptr<net::URLRequestContextGetter>&
+          url_request_context_getter,
+      const Attachment& attachment,
+      const UploadCallback& user_callback,
+      const std::string& account_id,
+      const OAuth2TokenService::ScopeSet& scopes,
+      OAuth2TokenServiceRequest::TokenServiceProvider* token_service_provider,
+      AttachmentUploaderImpl* owner);
 
   virtual ~UploadState();
 
   // Add |user_callback| to the list of callbacks to be invoked when this upload
   // completed.
   void AddUserCallback(const UploadCallback& user_callback);
 
   // Return the Attachment this object is uploading.
   const Attachment& GetAttachment();
 
   // URLFetcher implementation.
   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
 
+  // OAuth2TokenService::Consumer.
+  virtual void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
+                                 const std::string& access_token,
+                                 const base::Time& expiration_time) OVERRIDE;
+  virtual void OnGetTokenFailure(const OAuth2TokenService::Request* request,
+                                 const GoogleServiceAuthError& error) OVERRIDE;
+
  private:
   typedef std::vector<UploadCallback> UploadCallbackList;
 
+  void GetToken();
+
+  void ReportResult(const UploadResult& result,
+                    const AttachmentId& attachment_id);
+
   GURL upload_url_;
   const scoped_refptr<net::URLRequestContextGetter>&
       url_request_context_getter_;
   Attachment attachment_;
   UploadCallbackList user_callbacks_;
   scoped_ptr<net::URLFetcher> fetcher_;
+  std::string account_id_;
+  OAuth2TokenService::ScopeSet scopes_;
+  std::string access_token_;
+  OAuth2TokenServiceRequest::TokenServiceProvider* token_service_provider_;
   // Pointer to the AttachmentUploaderImpl that owns this object.
   AttachmentUploaderImpl* owner_;
+  scoped_ptr<OAuth2TokenServiceRequest> access_token_request_;
 
   DISALLOW_COPY_AND_ASSIGN(UploadState);
 };
 
 AttachmentUploaderImpl::UploadState::UploadState(
     const GURL& upload_url,
     const scoped_refptr<net::URLRequestContextGetter>&
         url_request_context_getter,
     const Attachment& attachment,
     const UploadCallback& user_callback,
+    const std::string& account_id,
+    const OAuth2TokenService::ScopeSet& scopes,
+    OAuth2TokenServiceRequest::TokenServiceProvider* token_service_provider,
     AttachmentUploaderImpl* owner)
-    : upload_url_(upload_url),
+    : OAuth2TokenService::Consumer("attachment-uploader-impl"),
+      upload_url_(upload_url),
       url_request_context_getter_(url_request_context_getter),
       attachment_(attachment),
       user_callbacks_(1, user_callback),
+      account_id_(account_id),
+      scopes_(scopes),
+      token_service_provider_(token_service_provider),
       owner_(owner) {
+  DCHECK(upload_url_.is_valid());
   DCHECK(url_request_context_getter_);
-  DCHECK(upload_url_.is_valid());
+  DCHECK(!account_id_.empty());
+  DCHECK(!scopes_.empty());
+  DCHECK(token_service_provider_);
   DCHECK(owner_);
-  fetcher_.reset(
-      net::URLFetcher::Create(upload_url_, net::URLFetcher::POST, this));
-  fetcher_->SetRequestContext(url_request_context_getter_.get());
-  // TODO(maniscalco): Is there a better way?  Copying the attachment data into
-  // a string feels wrong given how large attachments may be (several MBs).  If
-  // we may end up switching from URLFetcher to URLRequest, this copy won't be
-  // necessary.
-  scoped_refptr<base::RefCountedMemory> memory = attachment.GetData();
-  const std::string upload_content(memory->front_as<char>(), memory->size());
-  fetcher_->SetUploadData(kContentType, upload_content);
-  // TODO(maniscalco): Add authentication support (bug 371516).
-  fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SAVE_COOKIES |
-                         net::LOAD_DO_NOT_SEND_COOKIES |
-                         net::LOAD_DISABLE_CACHE);
-  // TODO(maniscalco): Set an appropriate headers (User-Agent, Content-type, and
-  // Content-length) on the request and include the content's MD5,
-  // AttachmentId's unique_id and the "sync birthday" (bug 371521).
-  fetcher_->Start();
+  GetToken();
 }
 
 AttachmentUploaderImpl::UploadState::~UploadState() {
 }
 
 void AttachmentUploaderImpl::UploadState::AddUserCallback(
     const UploadCallback& user_callback) {
   DCHECK(CalledOnValidThread());
   user_callbacks_.push_back(user_callback);
 }
 
 const Attachment& AttachmentUploaderImpl::UploadState::GetAttachment() {
   DCHECK(CalledOnValidThread());
   return attachment_;
 }
 
 void AttachmentUploaderImpl::UploadState::OnURLFetchComplete(
     const net::URLFetcher* source) {
   DCHECK(CalledOnValidThread());
-  // TODO(maniscalco): Once the protocol is better defined, deal with the
-  // various HTTP response code we may encounter.
   UploadResult result = UPLOAD_UNSPECIFIED_ERROR;
+  AttachmentId attachment_id = attachment_.GetId();
   if (source->GetResponseCode() == net::HTTP_OK) {
     result = UPLOAD_SUCCESS;
+    // TODO(maniscalco): Update the attachment id with server address
+    // information before passing it to the callback (bug 371522).
+  } else if (source->GetResponseCode() == net::HTTP_UNAUTHORIZED) {
+    // TODO(maniscalco): One possibility is that we received a 401 because our
+    // access token has expired.  We should probably fetch a new access token
+    // and retry this upload before giving up and reporting failure to our
+    // caller (bug 380437).
+    OAuth2TokenServiceRequest::InvalidateToken(
+        token_service_provider_, account_id_, scopes_, access_token_);
+  } else {
+    // TODO(maniscalco): Once the protocol is better defined, deal with the
+    // various HTTP response codes we may encounter.
   }
-  // TODO(maniscalco): Update the attachment id with server address information
-  // before passing it to the callback (bug 371522).
-  AttachmentId updated_id = attachment_.GetId();
+  ReportResult(result, attachment_id);
+}
+
+void AttachmentUploaderImpl::UploadState::OnGetTokenSuccess(
+    const OAuth2TokenService::Request* request,
+    const std::string& access_token,
+    const base::Time& expiration_time) {
+  DCHECK_EQ(access_token_request_.get(), request);
+  access_token_request_.reset();
+  access_token_ = access_token;
+  fetcher_.reset(
+      net::URLFetcher::Create(upload_url_, net::URLFetcher::POST, this));
+  fetcher_->SetRequestContext(url_request_context_getter_.get());
+  // TODO(maniscalco): Is there a better way?  Copying the attachment data into
+  // a string feels wrong given how large attachments may be (several MBs).  If
+  // we may end up switching from URLFetcher to URLRequest, this copy won't be
+  // necessary.
+  scoped_refptr<base::RefCountedMemory> memory = attachment_.GetData();
+  const std::string upload_content(memory->front_as<char>(), memory->size());
+  fetcher_->SetUploadData(kContentType, upload_content);
+  const std::string auth_header("Authorization: Bearer " + access_token_);
+  fetcher_->AddExtraRequestHeader(auth_header);
+  fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SAVE_COOKIES |
+                         net::LOAD_DO_NOT_SEND_COOKIES |
+                         net::LOAD_DISABLE_CACHE);
+  // TODO(maniscalco): Set an appropriate headers (User-Agent, Content-type, and
+  // Content-length) on the request and include the content's MD5,
+  // AttachmentId's unique_id and the "sync birthday" (bug 371521).
+  fetcher_->Start();
+}
+
+void AttachmentUploaderImpl::UploadState::OnGetTokenFailure(
+    const OAuth2TokenService::Request* request,
+    const GoogleServiceAuthError& error) {
+  DCHECK_EQ(access_token_request_.get(), request);
+  access_token_request_.reset();
+  ReportResult(UPLOAD_UNSPECIFIED_ERROR, attachment_.GetId());
+}
+
+void AttachmentUploaderImpl::UploadState::GetToken() {
+  access_token_request_ = OAuth2TokenServiceRequest::CreateAndStart(
+      token_service_provider_, account_id_, scopes_, this);
+}
+
+void AttachmentUploaderImpl::UploadState::ReportResult(
+    const UploadResult& result,
+    const AttachmentId& attachment_id) {
   UploadCallbackList::const_iterator iter = user_callbacks_.begin();
   UploadCallbackList::const_iterator end = user_callbacks_.end();
   for (; iter != end; ++iter) {
     base::MessageLoop::current()->PostTask(
-        FROM_HERE, base::Bind(*iter, result, updated_id));
+        FROM_HERE, base::Bind(*iter, result, attachment_id));
   }
   // Destroy this object and return immediately.
   owner_->DeleteUploadStateFor(attachment_.GetId().GetProto().unique_id());
   return;
 }
 
 AttachmentUploaderImpl::AttachmentUploaderImpl(
     const std::string& url_prefix,
     const scoped_refptr<net::URLRequestContextGetter>&
-        url_request_context_getter)
+        url_request_context_getter,
+    const std::string& account_id,
+    const OAuth2TokenService::ScopeSet& scopes,
+    scoped_ptr<OAuth2TokenServiceRequest::TokenServiceProvider>
+        token_service_provider)
     : url_prefix_(url_prefix),
-      url_request_context_getter_(url_request_context_getter) {
+      url_request_context_getter_(url_request_context_getter),
+      account_id_(account_id),
+      scopes_(scopes),
+      token_service_provider_(token_service_provider.Pass()) {
   DCHECK(CalledOnValidThread());
+  DCHECK(token_service_provider_);
 }
 
 AttachmentUploaderImpl::~AttachmentUploaderImpl() {
   DCHECK(CalledOnValidThread());
 }
 
 void AttachmentUploaderImpl::UploadAttachment(const Attachment& attachment,
                                               const UploadCallback& callback) {
   DCHECK(CalledOnValidThread());
   const AttachmentId attachment_id = attachment.GetId();
   const std::string unique_id = attachment_id.GetProto().unique_id();
   DCHECK(!unique_id.empty());
   StateMap::iterator iter = state_map_.find(unique_id);
   if (iter == state_map_.end()) {
     const GURL url = GetUploadURLForAttachmentId(attachment_id);
-    scoped_ptr<UploadState> upload_state(new UploadState(
-        url, url_request_context_getter_, attachment, callback, this));
+    scoped_ptr<UploadState> upload_state(
+        new UploadState(url,
+                        url_request_context_getter_,
+                        attachment,
+                        callback,
+                        account_id_,
+                        scopes_,
+                        token_service_provider_.get(),
+                        this));
     state_map_.add(unique_id, upload_state.Pass());
   } else {
     DCHECK(
         attachment.GetData()->Equals(iter->second->GetAttachment().GetData()));
     // We already have an upload for this attachment.  "Join" it.
     iter->second->AddUserCallback(callback);
   }
 }
 
 GURL AttachmentUploaderImpl::GetUploadURLForAttachmentId(
     const AttachmentId& attachment_id) const {
   return GURL(url_prefix_ + attachment_id.GetProto().unique_id());
 }
 
 void AttachmentUploaderImpl::DeleteUploadStateFor(const UniqueId& unique_id) {
   state_map_.erase(unique_id);
 }
 
 }  // namespace syncer