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cef/libcef/browser/devtools_frontend.cc

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// Copyright 2013 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 "libcef/browser/devtools_frontend.h"
#include <stddef.h>
#include "libcef/browser/browser_context.h"
#include "libcef/browser/devtools_manager_delegate.h"
#include "libcef/browser/net/devtools_scheme_handler.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/json/string_escape.h"
#include "base/macros.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/common/pref_names.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/content_client.h"
#include "content/public/common/url_constants.h"
#include "ipc/ipc_channel.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "net/http/http_response_headers.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_fetcher_response_writer.h"
namespace {
// ResponseWriter -------------------------------------------------------------
class ResponseWriter : public net::URLFetcherResponseWriter {
public:
ResponseWriter(base::WeakPtr<CefDevToolsFrontend> shell_devtools_,
int stream_id);
~ResponseWriter() override;
// URLFetcherResponseWriter overrides:
int Initialize(const net::CompletionCallback& callback) override;
int Write(net::IOBuffer* buffer,
int num_bytes,
const net::CompletionCallback& callback) override;
int Finish(int net_error, const net::CompletionCallback& callback) override;
private:
base::WeakPtr<CefDevToolsFrontend> shell_devtools_;
int stream_id_;
DISALLOW_COPY_AND_ASSIGN(ResponseWriter);
};
ResponseWriter::ResponseWriter(
base::WeakPtr<CefDevToolsFrontend> shell_devtools,
int stream_id)
: shell_devtools_(shell_devtools), stream_id_(stream_id) {}
ResponseWriter::~ResponseWriter() {}
int ResponseWriter::Initialize(const net::CompletionCallback& callback) {
return net::OK;
}
int ResponseWriter::Write(net::IOBuffer* buffer,
int num_bytes,
const net::CompletionCallback& callback) {
std::string chunk = std::string(buffer->data(), num_bytes);
if (!base::IsStringUTF8(chunk))
return num_bytes;
base::Value* id = new base::Value(stream_id_);
base::Value* chunkValue = new base::Value(chunk);
content::BrowserThread::PostTask(
content::BrowserThread::UI, FROM_HERE,
base::Bind(&CefDevToolsFrontend::CallClientFunction, shell_devtools_,
"DevToolsAPI.streamWrite", base::Owned(id),
base::Owned(chunkValue), nullptr));
return num_bytes;
}
int ResponseWriter::Finish(int net_error,
const net::CompletionCallback& callback) {
return net::OK;
}
static std::string GetFrontendURL() {
return base::StringPrintf("%s://%s/inspector.html",
content::kChromeDevToolsScheme,
scheme::kChromeDevToolsHost);
}
} // namespace
// This constant should be in sync with
// the constant at devtools_ui_bindings.cc.
const size_t kMaxMessageChunkSize = IPC::Channel::kMaximumMessageSize / 4;
// static
CefDevToolsFrontend* CefDevToolsFrontend::Show(
CefRefPtr<CefBrowserHostImpl> inspected_browser,
const CefWindowInfo& windowInfo,
CefRefPtr<CefClient> client,
const CefBrowserSettings& settings,
const CefPoint& inspect_element_at) {
CefBrowserSettings new_settings = settings;
if (!windowInfo.windowless_rendering_enabled &&
CefColorGetA(new_settings.background_color) != SK_AlphaOPAQUE) {
// Use white as the default background color for windowed DevTools instead
// of the CefSettings.background_color value.
new_settings.background_color = SK_ColorWHITE;
}
CefBrowserHostImpl::CreateParams create_params;
if (!inspected_browser->IsViewsHosted())
create_params.window_info.reset(new CefWindowInfo(windowInfo));
create_params.client = client;
create_params.settings = new_settings;
create_params.devtools_opener = inspected_browser;
create_params.request_context = inspected_browser->GetRequestContext();
CefRefPtr<CefBrowserHostImpl> frontend_browser =
CefBrowserHostImpl::Create(create_params);
content::WebContents* inspected_contents = inspected_browser->web_contents();
// CefDevToolsFrontend will delete itself when the frontend WebContents is
// destroyed.
CefDevToolsFrontend* devtools_frontend = new CefDevToolsFrontend(
static_cast<CefBrowserHostImpl*>(frontend_browser.get()),
inspected_contents, inspect_element_at);
// Need to load the URL after creating the DevTools objects.
frontend_browser->GetMainFrame()->LoadURL(GetFrontendURL());
return devtools_frontend;
}
void CefDevToolsFrontend::Activate() {
frontend_browser_->ActivateContents(web_contents());
}
void CefDevToolsFrontend::Focus() {
frontend_browser_->SetFocus(true);
}
void CefDevToolsFrontend::InspectElementAt(int x, int y) {
if (inspect_element_at_.x != x || inspect_element_at_.y != y)
inspect_element_at_.Set(x, y);
if (agent_host_)
agent_host_->InspectElement(this, x, y);
}
void CefDevToolsFrontend::Close() {
content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
base::Bind(&CefBrowserHostImpl::CloseBrowser,
frontend_browser_.get(), true));
}
void CefDevToolsFrontend::DisconnectFromTarget() {
if (!agent_host_)
return;
agent_host_->DetachClient(this);
agent_host_ = NULL;
}
CefDevToolsFrontend::CefDevToolsFrontend(
CefRefPtr<CefBrowserHostImpl> frontend_browser,
content::WebContents* inspected_contents,
const CefPoint& inspect_element_at)
: content::WebContentsObserver(frontend_browser->web_contents()),
frontend_browser_(frontend_browser),
inspected_contents_(inspected_contents),
inspect_element_at_(inspect_element_at),
weak_factory_(this) {}
CefDevToolsFrontend::~CefDevToolsFrontend() {
for (const auto& pair : pending_requests_)
delete pair.first;
}
void CefDevToolsFrontend::RenderViewCreated(
content::RenderViewHost* render_view_host) {
if (!frontend_host_) {
frontend_host_.reset(content::DevToolsFrontendHost::Create(
web_contents()->GetMainFrame(),
base::Bind(&CefDevToolsFrontend::HandleMessageFromDevToolsFrontend,
base::Unretained(this))));
}
}
void CefDevToolsFrontend::DocumentAvailableInMainFrame() {
// Don't call AttachClient multiple times for the same DevToolsAgentHost.
// Otherwise it will call AgentHostClosed which closes the DevTools window.
// This may happen in cases where the DevTools content fails to load.
scoped_refptr<content::DevToolsAgentHost> agent_host =
content::DevToolsAgentHost::GetOrCreateFor(inspected_contents_);
if (agent_host != agent_host_) {
agent_host_ = agent_host;
agent_host_->AttachClient(this);
if (!inspect_element_at_.IsEmpty()) {
agent_host_->InspectElement(this, inspect_element_at_.x,
inspect_element_at_.y);
}
}
}
void CefDevToolsFrontend::WebContentsDestroyed() {
if (agent_host_)
agent_host_->DetachClient(this);
delete this;
}
void CefDevToolsFrontend::SetPreferences(const std::string& json) {
if (json.empty())
return;
base::DictionaryValue* dict = nullptr;
std::unique_ptr<base::Value> parsed = base::JSONReader::Read(json);
if (!parsed || !parsed->GetAsDictionary(&dict))
return;
DictionaryPrefUpdate update(GetPrefs(), prefs::kDevToolsPreferences);
for (base::DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); it.Advance()) {
if (!it.value().IsType(base::Value::Type::STRING))
continue;
update.Get()->SetWithoutPathExpansion(it.key(),
it.value().CreateDeepCopy());
}
}
void CefDevToolsFrontend::HandleMessageFromDevToolsFrontend(
const std::string& message) {
if (!agent_host_)
return;
std::string method;
base::ListValue* params = NULL;
base::DictionaryValue* dict = NULL;
std::unique_ptr<base::Value> parsed_message = base::JSONReader::Read(message);
if (!parsed_message || !parsed_message->GetAsDictionary(&dict) ||
!dict->GetString("method", &method)) {
return;
}
int request_id = 0;
dict->GetInteger("id", &request_id);
dict->GetList("params", &params);
if (method == "dispatchProtocolMessage" && params && params->GetSize() == 1) {
if (!agent_host_ || !agent_host_->IsAttached())
return;
std::string protocol_message;
if (!params->GetString(0, &protocol_message))
return;
agent_host_->DispatchProtocolMessage(this, protocol_message);
} else if (method == "loadCompleted") {
web_contents()->GetMainFrame()->ExecuteJavaScriptForTests(
base::ASCIIToUTF16("DevToolsAPI.setUseSoftMenu(true);"));
} else if (method == "loadNetworkResource" && params->GetSize() == 3) {
// TODO(pfeldman): handle some of the embedder messages in content.
std::string url;
std::string headers;
int stream_id;
if (!params->GetString(0, &url) || !params->GetString(1, &headers) ||
!params->GetInteger(2, &stream_id)) {
return;
}
GURL gurl(url);
if (!gurl.is_valid()) {
base::DictionaryValue response;
response.SetInteger("statusCode", 404);
SendMessageAck(request_id, &response);
return;
}
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation(
"devtools_handle_front_end_messages", R"(
semantics {
sender: "Developer Tools"
description:
"When user opens Developer Tools, the browser may fetch "
"additional resources from the network to enrich the debugging "
"experience (e.g. source map resources)."
trigger: "User opens Developer Tools to debug a web page."
data: "Any resources requested by Developer Tools."
destination: OTHER
}
policy {
cookies_allowed: true
cookies_store: "user"
setting:
"It's not possible to disable this feature from settings."
chrome_policy {
DeveloperToolsDisabled {
policy_options {mode: MANDATORY}
DeveloperToolsDisabled: true
}
}
})");
net::URLFetcher* fetcher =
net::URLFetcher::Create(gurl, net::URLFetcher::GET, this,
traffic_annotation)
.release();
pending_requests_[fetcher] = request_id;
fetcher->SetRequestContext(
content::BrowserContext::GetDefaultStoragePartition(
web_contents()->GetBrowserContext())
->GetURLRequestContext());
fetcher->SetExtraRequestHeaders(headers);
fetcher->SaveResponseWithWriter(
std::unique_ptr<net::URLFetcherResponseWriter>(
new ResponseWriter(weak_factory_.GetWeakPtr(), stream_id)));
fetcher->Start();
return;
} else if (method == "getPreferences") {
SendMessageAck(request_id,
GetPrefs()->GetDictionary(prefs::kDevToolsPreferences));
return;
} else if (method == "setPreference") {
std::string name;
std::string value;
if (!params->GetString(0, &name) || !params->GetString(1, &value)) {
return;
}
DictionaryPrefUpdate update(GetPrefs(), prefs::kDevToolsPreferences);
update.Get()->SetStringWithoutPathExpansion(name, value);
} else if (method == "removePreference") {
std::string name;
if (!params->GetString(0, &name))
return;
DictionaryPrefUpdate update(GetPrefs(), prefs::kDevToolsPreferences);
update.Get()->RemoveWithoutPathExpansion(name, nullptr);
} else if (method == "requestFileSystems") {
web_contents()->GetMainFrame()->ExecuteJavaScriptForTests(
base::ASCIIToUTF16("DevToolsAPI.fileSystemsLoaded([]);"));
} else if (method == "reattach") {
agent_host_->DetachClient(this);
agent_host_->AttachClient(this);
} else {
return;
}
if (request_id)
SendMessageAck(request_id, nullptr);
}
void CefDevToolsFrontend::DispatchProtocolMessage(
content::DevToolsAgentHost* agent_host,
const std::string& message) {
if (message.length() < kMaxMessageChunkSize) {
std::string param;
base::EscapeJSONString(message, true, &param);
std::string code = "DevToolsAPI.dispatchMessage(" + param + ");";
base::string16 javascript = base::UTF8ToUTF16(code);
web_contents()->GetMainFrame()->ExecuteJavaScriptForTests(javascript);
return;
}
size_t total_size = message.length();
for (size_t pos = 0; pos < message.length(); pos += kMaxMessageChunkSize) {
std::string param;
base::EscapeJSONString(message.substr(pos, kMaxMessageChunkSize), true,
&param);
std::string code = "DevToolsAPI.dispatchMessageChunk(" + param + "," +
std::to_string(pos ? 0 : total_size) + ");";
base::string16 javascript = base::UTF8ToUTF16(code);
web_contents()->GetMainFrame()->ExecuteJavaScriptForTests(javascript);
}
}
void CefDevToolsFrontend::OnURLFetchComplete(const net::URLFetcher* source) {
// TODO(pfeldman): this is a copy of chrome's devtools_ui_bindings.cc.
// We should handle some of the commands including this one in content.
DCHECK(source);
PendingRequestsMap::iterator it = pending_requests_.find(source);
DCHECK(it != pending_requests_.end());
base::DictionaryValue response;
base::DictionaryValue* headers = new base::DictionaryValue();
net::HttpResponseHeaders* rh = source->GetResponseHeaders();
response.SetInteger("statusCode", rh ? rh->response_code() : 200);
response.Set("headers", headers);
size_t iterator = 0;
std::string name;
std::string value;
while (rh && rh->EnumerateHeaderLines(&iterator, &name, &value))
headers->SetString(name, value);
SendMessageAck(it->second, &response);
pending_requests_.erase(it);
delete source;
}
void CefDevToolsFrontend::CallClientFunction(const std::string& function_name,
const base::Value* arg1,
const base::Value* arg2,
const base::Value* arg3) {
std::string javascript = function_name + "(";
if (arg1) {
std::string json;
base::JSONWriter::Write(*arg1, &json);
javascript.append(json);
if (arg2) {
base::JSONWriter::Write(*arg2, &json);
javascript.append(", ").append(json);
if (arg3) {
base::JSONWriter::Write(*arg3, &json);
javascript.append(", ").append(json);
}
}
}
javascript.append(");");
web_contents()->GetMainFrame()->ExecuteJavaScriptForTests(
base::UTF8ToUTF16(javascript));
}
void CefDevToolsFrontend::SendMessageAck(int request_id,
const base::Value* arg) {
base::Value id_value(request_id);
CallClientFunction("DevToolsAPI.embedderMessageAck", &id_value, arg, nullptr);
}
void CefDevToolsFrontend::AgentHostClosed(
content::DevToolsAgentHost* agent_host,
bool replaced) {
DCHECK(agent_host == agent_host_.get());
agent_host_ = nullptr;
Close();
}
PrefService* CefDevToolsFrontend::GetPrefs() const {
return static_cast<CefBrowserContext*>(
frontend_browser_->web_contents()->GetBrowserContext())
->GetPrefs();
}
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