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// Copyright 2015 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 "mojo/shell/application_instance.h"
#include "base/bind.h"
#include "base/stl_util.h"
#include "mojo/application/public/interfaces/content_handler.mojom.h"
#include "mojo/common/common_type_converters.h"
#include "mojo/common/url_type_converters.h"
#include "mojo/shell/application_manager.h"
#include "mojo/shell/content_handler_connection.h"
namespace mojo {
namespace shell {
namespace {
// It's valid to specify mojo: URLs in the filter either as mojo:foo or
// mojo://foo/ - but we store the filter in the latter form.
CapabilityFilter CanonicalizeFilter(const CapabilityFilter& filter) {
CapabilityFilter canonicalized;
for (CapabilityFilter::const_iterator it = filter.begin();
it != filter.end();
++it) {
if (it->first == "*")
canonicalized[it->first] = it->second;
else
canonicalized[GURL(it->first).spec()] = it->second;
}
return canonicalized;
}
} // namespace
ApplicationInstance::ApplicationInstance(
ApplicationPtr application,
ApplicationManager* manager,
const Identity& originator_identity,
const Identity& identity,
const CapabilityFilter& filter,
uint32_t requesting_content_handler_id,
const base::Closure& on_application_end)
: manager_(manager),
originator_identity_(originator_identity),
identity_(identity),
filter_(CanonicalizeFilter(filter)),
allow_any_application_(filter.size() == 1 && filter.count("*") == 1),
requesting_content_handler_id_(requesting_content_handler_id),
on_application_end_(on_application_end),
application_(application.Pass()),
binding_(this),
queue_requests_(false) {
binding_.set_connection_error_handler([this]() { OnConnectionError(); });
}
ApplicationInstance::~ApplicationInstance() {
for (auto request : queued_client_requests_)
request->connect_callback().Run(kInvalidContentHandlerID);
STLDeleteElements(&queued_client_requests_);
}
void ApplicationInstance::InitializeApplication() {
ShellPtr shell;
binding_.Bind(GetProxy(&shell));
application_->Initialize(shell.Pass(), identity_.url.spec());
}
void ApplicationInstance::ConnectToClient(
scoped_ptr<ConnectToApplicationParams> params) {
if (queue_requests_) {
queued_client_requests_.push_back(params.release());
return;
}
CallAcceptConnection(params.Pass());
}
// Shell implementation:
void ApplicationInstance::ConnectToApplication(
URLRequestPtr app_request,
InterfaceRequest<ServiceProvider> services,
ServiceProviderPtr exposed_services,
CapabilityFilterPtr filter,
const ConnectToApplicationCallback& callback) {
std::string url_string = app_request->url.To<std::string>();
GURL url(url_string);
if (!url.is_valid()) {
LOG(ERROR) << "Error: invalid URL: " << url_string;
callback.Run(kInvalidContentHandlerID);
return;
}
if (allow_any_application_ || filter_.find(url.spec()) != filter_.end()) {
CapabilityFilter capability_filter = GetPermissiveCapabilityFilter();
if (!filter.is_null())
capability_filter = filter->filter.To<CapabilityFilter>();
scoped_ptr<ConnectToApplicationParams> params(
new ConnectToApplicationParams);
params->SetOriginatorInfo(this);
params->SetURLInfo(app_request.Pass());
params->set_services(services.Pass());
params->set_exposed_services(exposed_services.Pass());
params->set_filter(capability_filter);
params->set_connect_callback(callback);
manager_->ConnectToApplication(params.Pass());
} else {
LOG(WARNING) << "CapabilityFilter prevented connection from: " <<
identity_.url << " to: " << url.spec();
callback.Run(kInvalidContentHandlerID);
}
}
void ApplicationInstance::QuitApplication() {
queue_requests_ = true;
application_->OnQuitRequested(
base::Bind(&ApplicationInstance::OnQuitRequestedResult,
base::Unretained(this)));
}
void ApplicationInstance::CallAcceptConnection(
scoped_ptr<ConnectToApplicationParams> params) {
params->connect_callback().Run(requesting_content_handler_id_);
AllowedInterfaces interfaces;
interfaces.insert("*");
if (!params->originator_identity().is_null())
interfaces = GetAllowedInterfaces(params->originator_filter(), identity_);
application_->AcceptConnection(
params->originator_identity().url.spec(), params->TakeServices(),
params->TakeExposedServices(), Array<String>::From(interfaces).Pass(),
params->app_url().spec());
}
void ApplicationInstance::OnConnectionError() {
std::vector<ConnectToApplicationParams*> queued_client_requests;
queued_client_requests_.swap(queued_client_requests);
auto manager = manager_;
manager_->OnApplicationInstanceError(this);
//|this| is deleted.
// If any queued requests came to shell during time it was shutting down,
// start them now.
for (auto request : queued_client_requests) {
// Unfortunately, it is possible that |request->app_url_request()| is null
// at this point. Consider the following sequence:
// 1) connect_request_1 arrives at the application manager; the manager
// decides to fetch the app.
// 2) connect_request_2 arrives for the same app; because the app is not
// running yet, the manager decides to fetch the app again.
// 3) The fetch for step (1) completes and an application instance app_a is
// registered.
// 4) app_a goes into two-phase shutdown.
// 5) The fetch for step (2) completes; the manager finds that there is a
// running app already, so it connects to app_a.
// 6) connect_request_2 is queued (and eventually gets here), but its
// original_request field was already lost to NetworkFetcher at step (2).
//
// TODO(yzshen): It seems we should register a pending application instance
// before starting the fetch. So at step (2) the application manager knows
// that it can wait for the first fetch to complete instead of doing a
// second one directly.
if (!request->app_url_request()) {
URLRequestPtr url_request = mojo::URLRequest::New();
url_request->url = request->app_url().spec();
request->SetURLInfo(url_request.Pass());
}
manager->ConnectToApplication(make_scoped_ptr(request));
}
}
void ApplicationInstance::OnQuitRequestedResult(bool can_quit) {
if (can_quit)
return;
queue_requests_ = false;
for (auto request : queued_client_requests_)
CallAcceptConnection(make_scoped_ptr(request));
queued_client_requests_.clear();
}
} // namespace shell
} // namespace mojo
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