Use web-app manifest format for Android payment apps.

components/payments/content/payment_manifest_parser_host.cc

 // Copyright 2017 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 "components/payments/content/payment_manifest_parser_host.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "components/strings/grit/components_strings.h"
 #include "content/public/browser/utility_process_mojo_client.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "url/url_constants.h"
 
 namespace payments {
 
-PaymentManifestParserHost::PaymentManifestParserHost() {}
+PaymentManifestParserHost::PaymentManifestParserHost() : callback_counter_(0) {}
 
 PaymentManifestParserHost::~PaymentManifestParserHost() {}
 
 void PaymentManifestParserHost::StartUtilityProcess() {
   mojo_client_ = base::MakeUnique<
       content::UtilityProcessMojoClient<mojom::PaymentManifestParser>>(
       l10n_util::GetStringUTF16(
           IDS_UTILITY_PROCESS_PAYMENT_MANIFEST_PARSER_NAME));
   mojo_client_->set_error_callback(
       base::Bind(&PaymentManifestParserHost::OnUtilityProcessStopped,
                  base::Unretained(this)));
   mojo_client_->Start();
 }
 
-void PaymentManifestParserHost::ParsePaymentManifest(const std::string& content,
-                                                     Callback callback) {
+void PaymentManifestParserHost::ParsePaymentMethodManifest(
+    const std::string& content,
+    PaymentMethodCallback callback) {
   if (!mojo_client_) {
-    std::move(callback).Run(std::vector<mojom::PaymentManifestSectionPtr>());
+    std::move(callback).Run(std::vector<GURL>());
     return;
   }
 
-  pending_callbacks_.push_back(std::move(callback));
-  DCHECK_GE(10U, pending_callbacks_.size());
-  Callback* callback_identifier = &pending_callbacks_.back();
+  int64_t callback_identifier = callback_counter_++;
+  const auto& result = pending_payment_method_callbacks_.insert(
+      std::make_pair(callback_identifier, std::move(callback)));
+  DCHECK(result.second);
+  DCHECK_GE(10U, pending_payment_method_callbacks_.size());
 
-  mojo_client_->service()->Parse(
-      content, base::Bind(&PaymentManifestParserHost::OnParse,
+  mojo_client_->service()->ParsePaymentMethodManifest(
+      content, base::Bind(&PaymentManifestParserHost::OnPaymentMethodParse,
                           base::Unretained(this), callback_identifier));
 }
 
-void PaymentManifestParserHost::OnParse(
-    const Callback* callback_identifier,
-    std::vector<mojom::PaymentManifestSectionPtr> manifest) {
-  // At most 10 manifests to parse, so iterating a vector is not too slow.
+void PaymentManifestParserHost::ParseWebAppManifest(const std::string& content,
+                                                    WebAppCallback callback) {
+  if (!mojo_client_) {
+    std::move(callback).Run(std::vector<mojom::WebAppManifestSectionPtr>());
+    return;
+  }
+
+  int64_t callback_identifier = callback_counter_++;
+  const auto& result = pending_web_app_callbacks_.insert(
+      std::make_pair(callback_identifier, std::move(callback)));
+  DCHECK(result.second);
+  DCHECK_GE(10U, pending_web_app_callbacks_.size());
+
+  mojo_client_->service()->ParseWebAppManifest(
+      content, base::Bind(&PaymentManifestParserHost::OnWebAppParse,
+                          base::Unretained(this), callback_identifier));
+}
+
+void PaymentManifestParserHost::OnPaymentMethodParse(
+    int64_t callback_identifier,
+    const std::vector<GURL>& web_app_manifest_urls) {
   const auto& pending_callback_it =
-      std::find_if(pending_callbacks_.begin(), pending_callbacks_.end(),
-                   [callback_identifier](const Callback& pending_callback) {
-                     return &pending_callback == callback_identifier;
-                   });
-  if (pending_callback_it == pending_callbacks_.end()) {
+      pending_payment_method_callbacks_.find(callback_identifier);
+  if (pending_callback_it == pending_payment_method_callbacks_.end()) {
     // If unable to find the pending callback, then something went wrong in the
     // utility process. Stop the utility process and notify all callbacks.
     OnUtilityProcessStopped();
     return;
   }
 
-  Callback callback = std::move(*pending_callback_it);
-  pending_callbacks_.erase(pending_callback_it);
+  PaymentMethodCallback callback = std::move(pending_callback_it->second);
+  pending_payment_method_callbacks_.erase(pending_callback_it);
+
+  const size_t kMaximumNumberOfWebAppUrls = 100U;
+  if (web_app_manifest_urls.size() > kMaximumNumberOfWebAppUrls) {
+    // If more than 100 items, then something went wrong in the utility
+    // process. Stop the utility process and notify all callbacks.
+    OnUtilityProcessStopped();
+    return;
+  }
+
+  for (const auto& url : web_app_manifest_urls) {
+    if (!url.is_valid() || !url.SchemeIs(url::kHttpsScheme)) {
+      // If not a valid URL with HTTPS scheme, then something went wrong in the
+      // utility process. Stop the utility process and notify all callbacks.
+      OnUtilityProcessStopped();
+      return;
+    }
+  }
 
   // Can trigger synchronous deletion of this object, so can't access any of
   // the member variables after this block.
+  std::move(callback).Run(web_app_manifest_urls);
+}
+
+void PaymentManifestParserHost::OnWebAppParse(
+    int64_t callback_identifier,
+    std::vector<mojom::WebAppManifestSectionPtr> manifest) {
+  const auto& pending_callback_it =
+      pending_web_app_callbacks_.find(callback_identifier);
+  if (pending_callback_it == pending_web_app_callbacks_.end()) {
+    // If unable to find the pending callback, then something went wrong in the
+    // utility process. Stop the utility process and notify all callbacks.
+    OnUtilityProcessStopped();
+    return;
+  }
+
+  const size_t kMaximumNumberOfSections = 100U;
+  if (manifest.size() > kMaximumNumberOfSections) {
+    // If more than 100 items, then something went wrong in the utility
+    // process. Stop the utility process and notify all callbacks.
+    OnUtilityProcessStopped();
+    return;
+  }
+
+  for (size_t i = 0; i < manifest.size(); ++i) {
+    const size_t kMaximumNumberOfFingerprints = 100U;
+    if (manifest[i]->fingerprints.size() > kMaximumNumberOfFingerprints) {
+      // If more than 100 items, then something went wrong in the utility
+      // process. Stop the utility process and notify all callbacks.
+      OnUtilityProcessStopped();
+      return;
+    }
+  }
+
+  WebAppCallback callback = std::move(pending_callback_it->second);
+  pending_web_app_callbacks_.erase(pending_callback_it);
+
+  // Can trigger synchronous deletion of this object, so can't access any of
+  // the member variables after this block.
   std::move(callback).Run(std::move(manifest));
 }
 
 void PaymentManifestParserHost::OnUtilityProcessStopped() {
   mojo_client_.reset();
-  std::vector<Callback> callbacks = std::move(pending_callbacks_);
-  for (Callback& callback : callbacks) {
+
+  std::unordered_map<int64_t, PaymentMethodCallback> payment_method_callbacks =
+      std::move(pending_payment_method_callbacks_);
+  std::unordered_map<int64_t, WebAppCallback> web_app_callbacks =
+      std::move(pending_web_app_callbacks_);
+
+  for (auto& callback : payment_method_callbacks) {
     // Can trigger synchronous deletion of this object, so can't access any of
     // the member variables after this line.
-    std::move(callback).Run(std::vector<mojom::PaymentManifestSectionPtr>());
+    std::move(callback.second).Run(std::vector<GURL>());
+  }
+
+  for (auto& callback : web_app_callbacks) {
+    // Can trigger synchronous deletion of this object, so can't access any of
+    // the member variables after this line.
+    std::move(callback.second)
+        .Run(std::vector<mojom::WebAppManifestSectionPtr>());
   }
 }
 
 }  // namespace payments