blob: fe9360489ece9b42642f4be6262a859d8b911a1f [file] [log] [blame]
// Copyright (c) 2012 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.
#ifndef NET_TOOLS_QUIC_QUIC_HTTP_RESPONSE_CACHE_H_
#define NET_TOOLS_QUIC_QUIC_HTTP_RESPONSE_CACHE_H_
#include <list>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "base/macros.h"
#include "net/quic/core/spdy_utils.h"
#include "net/quic/platform/api/quic_containers.h"
#include "net/quic/platform/api/quic_mutex.h"
#include "net/quic/platform/api/quic_string_piece.h"
#include "net/quic/platform/api/quic_url.h"
#include "net/spdy/core/spdy_framer.h"
namespace net {
// In-memory cache for HTTP responses.
// Reads from disk cache generated by:
// `wget -p --save_headers <url>`
class QuicHttpResponseCache {
public:
// A ServerPushInfo contains path of the push request and everything needed in
// comprising a response for the push request.
struct ServerPushInfo {
ServerPushInfo(QuicUrl request_url,
SpdyHeaderBlock headers,
SpdyPriority priority,
std::string body);
ServerPushInfo(const ServerPushInfo& other);
QuicUrl request_url;
SpdyHeaderBlock headers;
SpdyPriority priority;
std::string body;
};
enum SpecialResponseType {
REGULAR_RESPONSE, // Send the headers and body like a server should.
CLOSE_CONNECTION, // Close the connection (sending the close packet).
IGNORE_REQUEST, // Do nothing, expect the client to time out.
};
// Container for response header/body pairs.
class Response {
public:
Response();
~Response();
SpecialResponseType response_type() const { return response_type_; }
const SpdyHeaderBlock& headers() const { return headers_; }
const SpdyHeaderBlock& trailers() const { return trailers_; }
const QuicStringPiece body() const { return QuicStringPiece(body_); }
void set_response_type(SpecialResponseType response_type) {
response_type_ = response_type;
}
void set_headers(SpdyHeaderBlock headers) { headers_ = std::move(headers); }
void set_trailers(SpdyHeaderBlock trailers) {
trailers_ = std::move(trailers);
}
void set_body(QuicStringPiece body) {
body_.assign(body.data(), body.size());
}
private:
SpecialResponseType response_type_;
SpdyHeaderBlock headers_;
SpdyHeaderBlock trailers_;
std::string body_;
DISALLOW_COPY_AND_ASSIGN(Response);
};
// Class to manage loading a resource file into memory. There are
// two uses: called by InitializeFromDirectory to load resources
// from files, and recursively called when said resources specify
// server push associations.
class ResourceFile {
public:
explicit ResourceFile(const base::FilePath& file_name);
virtual ~ResourceFile();
void Read();
// |base| is |file_name_| with |cache_directory| prefix stripped.
void SetHostPathFromBase(QuicStringPiece base);
const std::string& file_name() { return file_name_string_; }
QuicStringPiece host() { return host_; }
void set_host(QuicStringPiece host) { host_ = host; }
QuicStringPiece path() { return path_; }
void set_path(QuicStringPiece path) { path_ = path; }
const SpdyHeaderBlock& spdy_headers() { return spdy_headers_; }
QuicStringPiece body() { return body_; }
const std::vector<QuicStringPiece>& push_urls() { return push_urls_; }
protected:
void HandleXOriginalUrl();
void HandlePushUrls(const std::vector<QuicStringPiece>& push_urls);
QuicStringPiece RemoveScheme(QuicStringPiece url);
const std::string cache_directory_;
const base::FilePath file_name_;
const std::string file_name_string_;
std::string file_contents_;
QuicStringPiece body_;
SpdyHeaderBlock spdy_headers_;
QuicStringPiece x_original_url_;
std::vector<QuicStringPiece> push_urls_;
private:
QuicStringPiece host_;
QuicStringPiece path_;
QuicHttpResponseCache* cache_;
DISALLOW_COPY_AND_ASSIGN(ResourceFile);
};
QuicHttpResponseCache();
~QuicHttpResponseCache();
// Retrieve a response from this cache for a given host and path..
// If no appropriate response exists, nullptr is returned.
const Response* GetResponse(QuicStringPiece host, QuicStringPiece path) const;
// Adds a simple response to the cache. The response headers will
// only contain the "content-length" header with the length of |body|.
void AddSimpleResponse(QuicStringPiece host,
QuicStringPiece path,
int response_code,
QuicStringPiece body);
// Add a simple response to the cache as AddSimpleResponse() does, and add
// some server push resources(resource path, corresponding response status and
// path) associated with it.
// Push resource implicitly come from the same host.
void AddSimpleResponseWithServerPushResources(
QuicStringPiece host,
QuicStringPiece path,
int response_code,
QuicStringPiece body,
std::list<ServerPushInfo> push_resources);
// Add a response to the cache.
void AddResponse(QuicStringPiece host,
QuicStringPiece path,
SpdyHeaderBlock response_headers,
QuicStringPiece response_body);
// Add a response, with trailers, to the cache.
void AddResponse(QuicStringPiece host,
QuicStringPiece path,
SpdyHeaderBlock response_headers,
QuicStringPiece response_body,
SpdyHeaderBlock response_trailers);
// Simulate a special behavior at a particular path.
void AddSpecialResponse(QuicStringPiece host,
QuicStringPiece path,
SpecialResponseType response_type);
// Sets a default response in case of cache misses. Takes ownership of
// 'response'.
void AddDefaultResponse(Response* response);
// |cache_cirectory| can be generated using `wget -p --save-headers <url>`.
void InitializeFromDirectory(const std::string& cache_directory);
// Find all the server push resources associated with |request_url|.
std::list<ServerPushInfo> GetServerPushResources(std::string request_url);
private:
void AddResponseImpl(QuicStringPiece host,
QuicStringPiece path,
SpecialResponseType response_type,
SpdyHeaderBlock response_headers,
QuicStringPiece response_body,
SpdyHeaderBlock response_trailers);
std::string GetKey(QuicStringPiece host, QuicStringPiece path) const;
// Add some server push urls with given responses for specified
// request if these push resources are not associated with this request yet.
void MaybeAddServerPushResources(QuicStringPiece request_host,
QuicStringPiece request_path,
std::list<ServerPushInfo> push_resources);
// Check if push resource(push_host/push_path) associated with given request
// url already exists in server push map.
bool PushResourceExistsInCache(std::string original_request_url,
ServerPushInfo resource);
// Cached responses.
QuicUnorderedMap<std::string, std::unique_ptr<Response>> responses_
GUARDED_BY(response_mutex_);
// The default response for cache misses, if set.
std::unique_ptr<Response> default_response_ GUARDED_BY(response_mutex_);
// A map from request URL to associated server push responses (if any).
std::multimap<std::string, ServerPushInfo> server_push_resources_
GUARDED_BY(response_mutex_);
// Protects against concurrent access from test threads setting responses, and
// server threads accessing those responses.
mutable QuicMutex response_mutex_;
DISALLOW_COPY_AND_ASSIGN(QuicHttpResponseCache);
};
} // namespace net
#endif // NET_TOOLS_QUIC_QUIC_HTTP_RESPONSE_CACHE_H_