[Background Fetch] Get settled fetches for a specific request.

Two capabilities have been added to the GetSettledFetches task:
1. Support CacheQueryOptions, while fetching responses for completed
fetches from the Cache Storage.
2. Support for filtering responses corresponding to a specific request from
completed fetches.

Both will be useful to support match() and matchAll() methods on
BackgroundFetchSettledEvent.

Bug: 863016
Change-Id: Icababdd71cd1687644cacc9460550de89bdfc4d5
Reviewed-on: https://chromium-review.googlesource.com/1140324Reviewed-by: Peter Beverloo <peter@chromium.org>
Reviewed-by: Rayan Kanso <rayankans@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Mugdha Lakhani <nator@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577269}

content/browser/BUILD.gn

@@ -424,6 +424,8 @@ jumbo_source_set("browser") {
     "background_fetch/background_fetch_request_info.cc",
     "background_fetch/background_fetch_request_info.h",
     "background_fetch/background_fetch_request_manager.h",
+    "background_fetch/background_fetch_request_match_params.cc",
+    "background_fetch/background_fetch_request_match_params.h",
     "background_fetch/background_fetch_scheduler.cc",
     "background_fetch/background_fetch_scheduler.h",
     "background_fetch/background_fetch_service_impl.cc",

content/browser/background_fetch/background_fetch_context.cc

@@ -12,6 +12,7 @@
 #include "content/browser/background_fetch/background_fetch_metrics.h"
 #include "content/browser/background_fetch/background_fetch_registration_id.h"
 #include "content/browser/background_fetch/background_fetch_registration_notifier.h"
+#include "content/browser/background_fetch/background_fetch_request_match_params.h"
 #include "content/browser/background_fetch/background_fetch_scheduler.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
 #include "content/public/browser/background_fetch_delegate.h"
@@ -364,6 +365,7 @@ void BackgroundFetchContext::DidMarkForDeletion(
       // This will send a BackgroundFetchFetched or BackgroundFetchFail event.
       data_manager_->GetSettledFetchesForRegistration(
           registration_id,
+          std::make_unique<BackgroundFetchRequestMatchParams>(),
           base::BindOnce(&BackgroundFetchContext::DidGetSettledFetches,
                          weak_factory_.GetWeakPtr(), registration_id));
       return;

content/browser/background_fetch/background_fetch_data_manager.cc

@@ -213,11 +213,12 @@ void BackgroundFetchDataManager::MarkRequestAsComplete(
 
 void BackgroundFetchDataManager::GetSettledFetchesForRegistration(
     const BackgroundFetchRegistrationId& registration_id,
+    std::unique_ptr<BackgroundFetchRequestMatchParams> match_params,
     SettledFetchesCallback callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   AddDatabaseTask(std::make_unique<background_fetch::GetSettledFetchesTask>(
-      this, registration_id, std::move(callback)));
+      this, registration_id, std::move(match_params), std::move(callback)));
 }
 
 void BackgroundFetchDataManager::MarkRegistrationForDeletion(

content/browser/background_fetch/background_fetch_data_manager.h

@@ -36,6 +36,7 @@ namespace content {
 
 class BackgroundFetchDataManagerObserver;
 class BackgroundFetchRequestInfo;
+class BackgroundFetchRequestMatchParams;
 struct BackgroundFetchSettledFetch;
 class BrowserContext;
 class CacheStorageManager;
@@ -122,11 +123,13 @@ class CONTENT_EXPORT BackgroundFetchDataManager
       const std::string& title,
       blink::mojom::BackgroundFetchService::UpdateUICallback callback);
 
-  // Reads all settled fetches for the given |registration_id|. Both the Request
-  // and Response objects will be initialised based on the stored data. Will
-  // invoke the |callback| when the list of fetches has been compiled.
+  // Reads the settled fetches for the given |registration_id| based on
+  // |match_params|. Both the Request and Response objects will be initialised
+  // based on the stored data. Will invoke the |callback| when the list of
+  // fetches has been compiled.
   void GetSettledFetchesForRegistration(
       const BackgroundFetchRegistrationId& registration_id,
+      std::unique_ptr<BackgroundFetchRequestMatchParams> match_params,
       SettledFetchesCallback callback);
 
   // Marks that the backgroundfetched/backgroundfetchfail/backgroundfetchabort

content/browser/background_fetch/background_fetch_data_manager_unittest.cc

@@ -18,6 +18,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/background_fetch/background_fetch_data_manager_observer.h"
 #include "content/browser/background_fetch/background_fetch_request_info.h"
+#include "content/browser/background_fetch/background_fetch_request_match_params.h"
 #include "content/browser/background_fetch/background_fetch_test_base.h"
 #include "content/browser/background_fetch/background_fetch_test_data_manager.h"
 #include "content/browser/background_fetch/storage/database_helpers.h"
@@ -26,6 +27,7 @@
 #include "content/public/browser/background_fetch_response.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/storage_partition.h"
+#include "services/network/public/mojom/fetch_api.mojom.h"
 #include "storage/browser/blob/blob_data_handle.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ -334,6 +336,7 @@ class BackgroundFetchDataManagerTest
   // BackgroundFetchDataManager::GetSettledFetchesForRegistration().
   void GetSettledFetchesForRegistration(
       const BackgroundFetchRegistrationId& registration_id,
+      base::Optional<ServiceWorkerFetchRequest> request_to_match,
       blink::mojom::BackgroundFetchError* out_error,
       bool* out_succeeded,
       std::vector<BackgroundFetchSettledFetch>* out_settled_fetches) {
@@ -342,8 +345,10 @@ class BackgroundFetchDataManagerTest
     DCHECK(out_settled_fetches);
 
     base::RunLoop run_loop;
+    auto match_params = std::make_unique<BackgroundFetchRequestMatchParams>(
+        request_to_match, nullptr /* cache_query_params */);
     background_fetch_data_manager_->GetSettledFetchesForRegistration(
-        registration_id,
+        registration_id, std::move(match_params),
         base::BindOnce(&BackgroundFetchDataManagerTest::
                            DidGetSettledFetchesForRegistration,
                        base::Unretained(this), run_loop.QuitClosure(),
@@ -1091,8 +1096,9 @@ TEST_F(BackgroundFetchDataManagerTest, GetSettledFetchesForRegistration) {
   // Nothing is downloaded yet.
   bool succeeded = false;
   std::vector<BackgroundFetchSettledFetch> settled_fetches;
-  GetSettledFetchesForRegistration(registration_id, &error, &succeeded,
-                                   &settled_fetches);
+  GetSettledFetchesForRegistration(registration_id,
+                                   base::nullopt /* request_to_match */, &error,
+                                   &succeeded, &settled_fetches);
   EXPECT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
   EXPECT_TRUE(succeeded);
   EXPECT_EQ(settled_fetches.size(), 0u);
@@ -1112,8 +1118,9 @@ TEST_F(BackgroundFetchDataManagerTest, GetSettledFetchesForRegistration) {
       (ResponseStateStats{0 /* pending_requests */, 0 /* active_requests */,
                           requests.size() /* completed_requests */}));
 
-  GetSettledFetchesForRegistration(registration_id, &error, &succeeded,
-                                   &settled_fetches);
+  GetSettledFetchesForRegistration(registration_id,
+                                   base::nullopt /* request_to_match */, &error,
+                                   &succeeded, &settled_fetches);
 
   EXPECT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
   // We are marking the responses as failed in Download Manager.
@@ -1137,8 +1144,9 @@ TEST_F(BackgroundFetchDataManagerTest, GetSettledFetchesFromCache) {
   bool succeeded = false;
   std::vector<BackgroundFetchSettledFetch> settled_fetches;
   // Nothing is downloaded yet.
-  GetSettledFetchesForRegistration(registration_id, &error, &succeeded,
-                                   &settled_fetches);
+  GetSettledFetchesForRegistration(registration_id,
+                                   base::nullopt /* request_to_match */, &error,
+                                   &succeeded, &settled_fetches);
   EXPECT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
   EXPECT_TRUE(succeeded);
   EXPECT_EQ(settled_fetches.size(), 0u);
@@ -1150,8 +1158,9 @@ TEST_F(BackgroundFetchDataManagerTest, GetSettledFetchesFromCache) {
                                                  true /* success */);
   MarkRequestAsComplete(registration_id, request_info.get());
 
-  GetSettledFetchesForRegistration(registration_id, &error, &succeeded,
-                                   &settled_fetches);
+  GetSettledFetchesForRegistration(registration_id,
+                                   base::nullopt /* request_to_match */, &error,
+                                   &succeeded, &settled_fetches);
   EXPECT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
   EXPECT_TRUE(succeeded);
   EXPECT_EQ(settled_fetches.size(), 1u);
@@ -1162,8 +1171,9 @@ TEST_F(BackgroundFetchDataManagerTest, GetSettledFetchesFromCache) {
                                                  true /* success */);
   MarkRequestAsComplete(registration_id, request_info.get());
 
-  GetSettledFetchesForRegistration(registration_id, &error, &succeeded,
-                                   &settled_fetches);
+  GetSettledFetchesForRegistration(registration_id,
+                                   base::nullopt /* request_to_match */, &error,
+                                   &succeeded, &settled_fetches);
   EXPECT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
   EXPECT_TRUE(succeeded);
   ASSERT_EQ(settled_fetches.size(), 2u);
@@ -1178,13 +1188,92 @@ TEST_F(BackgroundFetchDataManagerTest, GetSettledFetchesFromCache) {
 
   RestartDataManagerFromPersistentStorage();
 
-  GetSettledFetchesForRegistration(registration_id, &error, &succeeded,
-                                   &settled_fetches);
+  GetSettledFetchesForRegistration(registration_id,
+                                   base::nullopt /* request_to_match */, &error,
+                                   &succeeded, &settled_fetches);
   EXPECT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
   EXPECT_TRUE(succeeded);
   EXPECT_EQ(settled_fetches.size(), 2u);
 }
 
+TEST_F(BackgroundFetchDataManagerTest, GetSettledFetchesForASpecificRequest) {
+  int64_t sw_id = RegisterServiceWorker();
+  ASSERT_NE(blink::mojom::kInvalidServiceWorkerRegistrationId, sw_id);
+
+  auto requests = CreateValidRequests(origin(), 2u /* num_requests */);
+  BackgroundFetchOptions options;
+  blink::mojom::BackgroundFetchError error;
+  BackgroundFetchRegistrationId registration_id(
+      sw_id, origin(), kExampleDeveloperId, kExampleUniqueId);
+
+  CreateRegistration(registration_id, requests, options, SkBitmap(), &error);
+  ASSERT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
+
+  for (size_t i = 0; i < requests.size(); i++) {
+    SCOPED_TRACE(i);
+    scoped_refptr<BackgroundFetchRequestInfo> request_info;
+    PopNextRequest(registration_id, &request_info);
+    ASSERT_TRUE(request_info);
+    AnnotateRequestInfoWithFakeDownloadManagerData(request_info.get());
+    MarkRequestAsComplete(registration_id, request_info.get());
+  }
+
+  EXPECT_EQ(
+      GetRequestStats(sw_id),
+      (ResponseStateStats{0 /* pending_requests */, 0 /* active_requests */,
+                          requests.size() /* completed_requests */}));
+
+  bool succeeded = false;
+  std::vector<BackgroundFetchSettledFetch> settled_fetches;
+  GetSettledFetchesForRegistration(registration_id,
+                                   requests[0] /* request_to_match */, &error,
+                                   &succeeded, &settled_fetches);
+
+  ASSERT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
+  // We are marking the responses as failed in Download Manager.
+  EXPECT_FALSE(succeeded);
+  EXPECT_EQ(settled_fetches.size(), 1u);
+}
+
+TEST_F(BackgroundFetchDataManagerTest,
+       GetSettledFetchesForANonMatchingRequest) {
+  int64_t sw_id = RegisterServiceWorker();
+  ASSERT_NE(blink::mojom::kInvalidServiceWorkerRegistrationId, sw_id);
+
+  auto requests = CreateValidRequests(origin(), 3u /* num_requests */);
+  BackgroundFetchOptions options;
+  blink::mojom::BackgroundFetchError error;
+  BackgroundFetchRegistrationId registration_id(
+      sw_id, origin(), kExampleDeveloperId, kExampleUniqueId);
+
+  CreateRegistration(registration_id, requests, options, SkBitmap(), &error);
+  ASSERT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
+
+  for (size_t i = 0; i < requests.size() - 1; i++) {
+    SCOPED_TRACE(i);
+    scoped_refptr<BackgroundFetchRequestInfo> request_info;
+    PopNextRequest(registration_id, &request_info);
+    ASSERT_TRUE(request_info);
+    AnnotateRequestInfoWithFakeDownloadManagerData(request_info.get());
+    MarkRequestAsComplete(registration_id, request_info.get());
+  }
+
+  EXPECT_EQ(
+      GetRequestStats(sw_id),
+      (ResponseStateStats{1 /* pending_requests */, 0 /* active_requests */,
+                          requests.size() - 1 /* completed_requests */}));
+
+  bool succeeded = false;
+  std::vector<BackgroundFetchSettledFetch> settled_fetches;
+  GetSettledFetchesForRegistration(registration_id,
+                                   requests[2] /* request_to_match */, &error,
+                                   &succeeded, &settled_fetches);
+  ASSERT_EQ(error, blink::mojom::BackgroundFetchError::NONE);
+  EXPECT_EQ(settled_fetches.size(), 1u);
+  EXPECT_EQ(settled_fetches[0].response.response_type,
+            network::mojom::FetchResponseType::kError);
+}
+
 TEST_F(BackgroundFetchDataManagerTest, Cleanup) {
   // Tests that the BackgroundFetchDataManager cleans up registrations
   // marked for deletion.

content/browser/background_fetch/background_fetch_request_match_params.cc

+// Copyright 2018 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 "content/browser/background_fetch/background_fetch_request_match_params.h"
+
+namespace content {
+
+BackgroundFetchRequestMatchParams::BackgroundFetchRequestMatchParams(
+    base::Optional<ServiceWorkerFetchRequest> request_to_match,
+    blink::mojom::QueryParamsPtr cache_query_params)
+    : request_to_match_(std::move(request_to_match)),
+      cache_query_params_(std::move(cache_query_params)) {}
+
+BackgroundFetchRequestMatchParams::BackgroundFetchRequestMatchParams() =
+    default;
+BackgroundFetchRequestMatchParams::~BackgroundFetchRequestMatchParams() =
+    default;
+
+}  // namespace content
\ No newline at end of file

content/browser/background_fetch/background_fetch_request_match_params.h

+// Copyright 2018 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.
+
+#ifndef CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_REQUEST_MATCH_PARAMS_H_
+#define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_REQUEST_MATCH_PARAMS_H_
+
+#include "base/optional.h"
+#include "content/common/service_worker/service_worker_types.h"
+#include "third_party/blink/public/platform/modules/cache_storage/cache_storage.mojom.h"
+
+namespace content {
+
+class CONTENT_EXPORT BackgroundFetchRequestMatchParams {
+ public:
+  // TODO(crbug.com/863852): Add boolean to differentiate between match vs
+  // matchAll.
+  BackgroundFetchRequestMatchParams();
+  BackgroundFetchRequestMatchParams(
+      base::Optional<ServiceWorkerFetchRequest> request_to_match,
+      blink::mojom::QueryParamsPtr cache_query_params);
+  ~BackgroundFetchRequestMatchParams();
+
+  bool FilterByRequest() const {
+    return request_to_match_.has_value();
+  }
+
+  // Only call this method if a valid request_to_match was previously provided.
+  const ServiceWorkerFetchRequest& request_to_match() const {
+    DCHECK(request_to_match_.has_value());
+    return request_to_match_.value();
+  }
+
+  blink::mojom::QueryParamsPtr cloned_cache_query_params() const {
+    if (!cache_query_params_)
+      return nullptr;
+    return cache_query_params_->Clone();
+  }
+
+ private:
+  // If |request_to_match| is present, we get response(s) only for this request.
+  // If not present, response(s) for all requests (contained in the fetch) will
+  // be returned.
+  base::Optional<ServiceWorkerFetchRequest> request_to_match_;
+
+  // When nullptr, this has no effect on the response(s) returned.
+  blink::mojom::QueryParamsPtr cache_query_params_;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundFetchRequestMatchParams);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_REQUEST_MATCH_PARAMS_H_

content/browser/background_fetch/storage/get_settled_fetches_task.cc

@@ -17,9 +17,11 @@ namespace background_fetch {
 GetSettledFetchesTask::GetSettledFetchesTask(
     DatabaseTaskHost* host,
     BackgroundFetchRegistrationId registration_id,
+    std::unique_ptr<BackgroundFetchRequestMatchParams> match_params,
     SettledFetchesCallback callback)
     : DatabaseTask(host),
       registration_id_(registration_id),
+      match_params_(std::move(match_params)),
       settled_fetches_callback_(std::move(callback)),
       weak_factory_(this) {}
 
@@ -101,12 +103,39 @@ void GetSettledFetchesTask::GetResponses() {
     return;
   }
 
+  if (match_params_->FilterByRequest()) {
+    // Get a response only for the relevant fetch.
+    settled_fetches_.emplace_back();
+    settled_fetches_.back().request = match_params_->request_to_match();
+    for (const auto& completed_request : completed_requests_) {
+      if (completed_request.serialized_request() !=
+          match_params_->request_to_match().Serialize()) {
+        continue;
+      }
+      // A matching request!
+      FillResponse(&settled_fetches_.back(),
+                   base::BindOnce(&GetSettledFetchesTask::FinishWithError,
+                                  weak_factory_.GetWeakPtr(),
+                                  blink::mojom::BackgroundFetchError::NONE));
+      // TODO(crbug.com/863852): Add support for matchAll();
+      return;
+    }
+
+    // No matching request found.
+    FillUncachedResponse(
+        &settled_fetches_.back(),
+        base::BindOnce(&GetSettledFetchesTask::FinishWithError,
+                       weak_factory_.GetWeakPtr(),
+                       blink::mojom::BackgroundFetchError::NONE));
+    return;
+  }
+
+  // Process all completed requests.
   base::RepeatingClosure barrier_closure = base::BarrierClosure(
       completed_requests_.size(),
       base::BindOnce(&GetSettledFetchesTask::FinishWithError,
                      weak_factory_.GetWeakPtr(),
                      blink::mojom::BackgroundFetchError::NONE));
-
   settled_fetches_.reserve(completed_requests_.size());
   for (const auto& completed_request : completed_requests_) {
     settled_fetches_.emplace_back();
@@ -125,8 +154,8 @@ void GetSettledFetchesTask::FillResponse(
 
   auto request =
       std::make_unique<ServiceWorkerFetchRequest>(settled_fetch->request);
-
-  handle_.value()->Match(std::move(request), nullptr /* match_params */,
+  handle_.value()->Match(std::move(request),
+                         match_params_->cloned_cache_query_params(),
                          base::BindOnce(&GetSettledFetchesTask::DidMatchRequest,
                                         weak_factory_.GetWeakPtr(),
                                         settled_fetch, std::move(callback)));
@@ -143,6 +172,7 @@ void GetSettledFetchesTask::DidMatchRequest(
     return;
   }
   settled_fetch->response = std::move(*cache_response);
+
   std::move(callback).Run();
 }
 

content/browser/background_fetch/storage/get_settled_fetches_task.h

@@ -8,6 +8,7 @@
 #include "base/callback_forward.h"
 #include "base/memory/scoped_refptr.h"
 #include "content/browser/background_fetch/background_fetch.pb.h"
+#include "content/browser/background_fetch/background_fetch_request_match_params.h"
 #include "content/browser/background_fetch/storage/database_task.h"
 #include "content/browser/cache_storage/cache_storage_cache_handle.h"
 #include "storage/browser/blob/blob_data_handle.h"
@@ -15,6 +16,8 @@
 
 namespace content {
 
+class BackgroundFetchRequestMatchParams;
+
 namespace background_fetch {
 
 class GetSettledFetchesTask : public DatabaseTask {
@@ -25,8 +28,12 @@ class GetSettledFetchesTask : public DatabaseTask {
       std::vector<BackgroundFetchSettledFetch>,
       std::vector<std::unique_ptr<storage::BlobDataHandle>>)>;
 
-  GetSettledFetchesTask(DatabaseTaskHost* host,
+  // Gets settled fetches from cache storage, filtered according to
+  // |match_params|.
+  GetSettledFetchesTask(
+      DatabaseTaskHost* host,
       BackgroundFetchRegistrationId registration_id,
+      std::unique_ptr<BackgroundFetchRequestMatchParams> match_params,
       SettledFetchesCallback callback);
 
   ~GetSettledFetchesTask() override;
@@ -59,6 +66,7 @@ class GetSettledFetchesTask : public DatabaseTask {
   void FinishWithError(blink::mojom::BackgroundFetchError error) override;
 
   BackgroundFetchRegistrationId registration_id_;
+  std::unique_ptr<BackgroundFetchRequestMatchParams> match_params_;
   SettledFetchesCallback settled_fetches_callback_;
 
   // SettledFetchesCallback params.