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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
#define CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "base/memory/weak_ptr.h"
#include "base/supports_user_data.h"
#include "base/values.h"
#include "content/browser/webui/url_data_manager.h"
#include "net/http/http_response_headers.h"
class GURL;
namespace base {
class RefCountedMemory;
}
namespace content {
class BrowserContext;
class URLDataSourceImpl;
// URLDataManagerBackend is used internally by ChromeURLDataManager on the UI
// thread. In most cases you can use the API in ChromeURLDataManager and ignore
// this class. URLDataManagerBackend is owned by BrowserContext.
class CONTENT_EXPORT URLDataManagerBackend
: public base::SupportsUserData::Data {
public:
typedef int RequestID;
using DataSourceMap = std::map<std::string, scoped_refptr<URLDataSourceImpl>>;
URLDataManagerBackend();
URLDataManagerBackend(const URLDataManagerBackend&) = delete;
URLDataManagerBackend& operator=(const URLDataManagerBackend&) = delete;
~URLDataManagerBackend() override;
static URLDataManagerBackend* GetForBrowserContext(BrowserContext* context);
// Adds a DataSource to the collection of data sources.
void AddDataSource(URLDataSourceImpl* source);
void UpdateWebUIDataSource(const std::string& source_name,
const base::Value::Dict& update);
// DataSource invokes this. Sends the data to the URLRequest. |bytes| may be
// null, which signals an error handling the request.
void DataAvailable(RequestID request_id, base::RefCountedMemory* bytes);
// Look up the data source for the request. Returns the source if it is found,
// else NULL.
URLDataSourceImpl* GetDataSourceFromURL(const GURL& url);
const DataSourceMap& data_sources() const { return data_sources_; }
// Creates and sets the response headers for the given request.
static scoped_refptr<net::HttpResponseHeaders> GetHeaders(
URLDataSourceImpl* source,
const GURL& url,
const std::string& origin);
// Returns whether |url| passes some sanity checks and is a valid GURL.
static bool CheckURLIsValid(const GURL& url);
// Check if the given integer is a valid network error code.
static bool IsValidNetworkErrorCode(int error_code);
// Returns the schemes that are used by WebUI (i.e. the set from content and
// its embedder).
static std::vector<std::string> GetWebUISchemes();
// When this is true, GetWebUISchemes() bypasses the caching of its result
// and always recomputes the list of WebUI schemes. This should be used in
// tests that inject custom WebUI schemes, which may otherwise not be seen.
static void SetDisallowWebUISchemeCachingForTesting(bool disallow_caching);
private:
// Custom sources of data, keyed by source path (e.g. "favicon").
DataSourceMap data_sources_;
// Vends weak pointers to URLDataSources, allowing them to continue referring
// to the backend that originally owned them, even if they've been replaced
// and detached from the backend. This allows outstanding asynchronous queries
// to be served and routed to the backend to which they were original issued.
base::WeakPtrFactory<URLDataManagerBackend> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
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