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// Copyright (c) 2010 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 <algorithm>
#include "webkit/appcache/view_appcache_internals_job.h"
#include "base/base64.h"
#include "base/logging.h"
#include "base/format_macros.h"
#include "base/utf_string_conversions.h"
#include "base/i18n/time_formatting.h"
#include "base/string_util.h"
#include "net/base/escape.h"
#include "net/url_request/url_request.h"
#include "webkit/appcache/appcache_policy.h"
#include "webkit/appcache/appcache_service.h"
namespace {
const char kErrorMessage[] = "Error in retrieving Application Caches.";
const char kEmptyAppCachesMessage[] = "No available Application Caches.";
const char kRemoveAppCache[] = "Remove this AppCache";
const char kManifest[] = "Manifest: ";
const char kSize[] = "Size: ";
const char kCreationTime[] = "Creation Time: ";
const char kLastAccessTime[] = "Last Access Time: ";
const char kLastUpdateTime[] = "Last Update Time: ";
const char kFormattedDisabledAppCacheMsg[] =
"<b><i><font color=\"FF0000\">"
"This Application Cache is disabled by policy.</font></i></b><br/>";
void StartHTML(std::string* out) {
DCHECK(out);
out->append(
"<!DOCTYPE HTML>"
"<html><title>AppCache Internals</title>"
"<style>"
"body { font-family: sans-serif; font-size: 0.8em; }\n"
"tt, code, pre { font-family: WebKitHack, monospace; }\n"
".subsection_body { margin: 10px 0 10px 2em; }\n"
".subsection_title { font-weight: bold; }\n"
"</style>"
"<script>\n"
// Unfortunately we can't do XHR from chrome://appcache-internals
// because the chrome:// protocol restricts access.
//
// So instead, we will send commands by doing a form
// submission (which as a side effect will reload the page).
"function RemoveCommand(command) {\n"
" document.getElementById('cmd').value = command;\n"
" document.getElementById('cmdsender').submit();\n"
"}\n"
"</script>\n"
"</head><body>"
"<form action='' method=GET id=cmdsender>"
"<input type='hidden' id=cmd name='remove'>"
"</form>");
}
void EndHTML(std::string* out) {
DCHECK(out);
out->append("</body></html>");
}
// Appends an input button to |data| with text |title| that sends the command
// string |command| back to the browser, and then refreshes the page.
void DrawCommandButton(const std::string& title,
const std::string& command,
std::string* data) {
base::StringAppendF(data, "<input type=\"button\" value=\"%s\" "
"onclick=\"RemoveCommand('%s')\" />",
title.c_str(),
command.c_str());
}
void AddLiTag(const std::string& element_title,
const std::string& element_data, std::string* out) {
DCHECK(out);
out->append("<li>");
out->append(element_title);
out->append(element_data);
out->append("</li>");
}
void WrapInHREF(const std::string& in, std::string* out) {
out->append("<a href=");
out->append(in);
out->append(">");
out->append(in);
out->append("</a><br/>");
}
void AddHTMLFromAppCacheToOutput(
const appcache::AppCacheService& appcache_service,
const appcache::AppCacheInfoVector& appcaches, std::string* out) {
for (std::vector<appcache::AppCacheInfo>::const_iterator info =
appcaches.begin();
info != appcaches.end(); ++info) {
std::string manifest_url_base64;
base::Base64Encode(info->manifest_url.spec(), &manifest_url_base64);
out->append("<p>");
std::string anchored_manifest;
WrapInHREF(info->manifest_url.spec(), &anchored_manifest);
out->append(kManifest);
out->append(anchored_manifest);
if (!appcache_service.appcache_policy()->CanLoadAppCache(
info->manifest_url)) {
out->append(kFormattedDisabledAppCacheMsg);
}
out->append("<br/>");
DrawCommandButton(kRemoveAppCache, manifest_url_base64, out);
out->append("<ul>");
AddLiTag(kSize,
UTF16ToUTF8(FormatBytes(
info->size, GetByteDisplayUnits(info->size), true)),
out);
AddLiTag(kCreationTime,
UTF16ToUTF8(TimeFormatFriendlyDateAndTime(info->creation_time)),
out);
AddLiTag(kLastAccessTime,
UTF16ToUTF8(TimeFormatFriendlyDateAndTime(info->last_access_time)),
out);
AddLiTag(kLastUpdateTime,
UTF16ToUTF8(TimeFormatFriendlyDateAndTime(info->last_update_time)),
out);
out->append("</ul></p></br>");
}
}
std::string GetAppCacheManifestToRemove(const std::string& query) {
if (!StartsWithASCII(query, "remove=", true)) {
// Not a recognized format.
return std::string();
}
std::string manifest_url_base64 = UnescapeURLComponent(
query.substr(strlen("remove=")),
UnescapeRule::NORMAL | UnescapeRule::URL_SPECIAL_CHARS);
std::string manifest_url;
base::Base64Decode(manifest_url_base64, &manifest_url);
return manifest_url;
}
struct ManifestURLComparator {
public:
bool operator() (
const appcache::AppCacheInfo& lhs,
const appcache::AppCacheInfo& rhs) const {
return (lhs.manifest_url.spec() < rhs.manifest_url.spec());
}
} manifest_url_comparator;
} // namespace
namespace appcache {
ViewAppCacheInternalsJob::ViewAppCacheInternalsJob(
net::URLRequest* request,
AppCacheService* service)
: net::URLRequestSimpleJob(request),
appcache_service_(service) {
}
ViewAppCacheInternalsJob::~ViewAppCacheInternalsJob() {
// Cancel callback if job is destroyed before callback is called.
if (appcache_done_callback_)
appcache_done_callback_.release()->Cancel();
}
void ViewAppCacheInternalsJob::GetAppCacheInfoAsync() {
info_collection_ = new AppCacheInfoCollection;
appcache_done_callback_ =
new net::CancelableCompletionCallback<ViewAppCacheInternalsJob>(
this, &ViewAppCacheInternalsJob::AppCacheDone);
appcache_service_->GetAllAppCacheInfo(
info_collection_, appcache_done_callback_);
}
void ViewAppCacheInternalsJob::RemoveAppCacheInfoAsync(
const std::string& manifest_url_spec) {
appcache_done_callback_ =
new net::CancelableCompletionCallback<ViewAppCacheInternalsJob>(
this, &ViewAppCacheInternalsJob::AppCacheDone);
GURL manifest(manifest_url_spec);
appcache_service_->DeleteAppCacheGroup(
manifest, appcache_done_callback_);
}
void ViewAppCacheInternalsJob::Start() {
if (!request_)
return;
// Handle any remove appcache request, then redirect back to
// the same URL stripped of query parameters. The redirect happens as part
// of IsRedirectResponse().
if (request_->url().has_query()) {
std::string remove_appcache_manifest(
GetAppCacheManifestToRemove(request_->url().query()));
// Empty manifests are dealt with by the deleter.
RemoveAppCacheInfoAsync(remove_appcache_manifest);
} else {
GetAppCacheInfoAsync();
}
}
bool ViewAppCacheInternalsJob::IsRedirectResponse(
GURL* location, int* http_status_code) {
if (request_->url().has_query()) {
// Strip the query parameters.
GURL::Replacements replacements;
replacements.ClearQuery();
*location = request_->url().ReplaceComponents(replacements);
*http_status_code = 307;
return true;
}
return false;
}
void ViewAppCacheInternalsJob::GenerateHTMLAppCacheInfo(
std::string* out) const {
typedef std::map<GURL, AppCacheInfoVector> InfoByOrigin;
AppCacheInfoVector appcaches;
for (InfoByOrigin::const_iterator origin =
info_collection_->infos_by_origin.begin();
origin != info_collection_->infos_by_origin.end(); ++origin) {
for (AppCacheInfoVector::const_iterator info =
origin->second.begin(); info != origin->second.end(); ++info)
appcaches.push_back(*info);
}
std::sort(appcaches.begin(), appcaches.end(), manifest_url_comparator);
AddHTMLFromAppCacheToOutput(*appcache_service_, appcaches, out);
}
void ViewAppCacheInternalsJob::AppCacheDone(int rv) {
appcache_done_callback_ = NULL;
if (rv != net::OK)
info_collection_ = NULL;
StartAsync();
}
bool ViewAppCacheInternalsJob::GetData(std::string* mime_type,
std::string* charset,
std::string* data) const {
mime_type->assign("text/html");
charset->assign("UTF-8");
data->clear();
StartHTML(data);
if (!info_collection_.get())
data->append(kErrorMessage);
else if (info_collection_->infos_by_origin.empty())
data->append(kEmptyAppCachesMessage);
else
GenerateHTMLAppCacheInfo(data);
EndHTML(data);
return true;
}
} // namespace appcache
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