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// 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.
#include <map>
#include <set>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/containers/hash_tables.h"
#include "base/gtest_prod_util.h"
#include "base/threading/non_thread_safe.h"
#include "base/values.h"
#include "net/base/host_port_pair.h"
#include "net/base/net_export.h"
#include "net/http/http_server_properties.h"
namespace base {
class ListValue;
namespace net {
// The implementation for setting/retrieving the HTTP server properties.
class NET_EXPORT HttpServerPropertiesImpl
: public HttpServerProperties,
NON_EXPORTED_BASE(public base::NonThreadSafe) {
~HttpServerPropertiesImpl() override;
// Initializes |spdy_servers_map_| with the servers (host/port) from
// |spdy_servers| that either support SPDY or not.
void InitializeSpdyServers(std::vector<std::string>* spdy_servers,
bool support_spdy);
void InitializeAlternateProtocolServers(
AlternateProtocolMap* alternate_protocol_servers);
void InitializeSpdySettingsServers(SpdySettingsMap* spdy_settings_map);
void InitializeSupportsQuic(SupportsQuicMap* supports_quic_map);
void InitializeServerNetworkStats(
ServerNetworkStatsMap* server_network_stats_map);
// Get the list of servers (host/port) that support SPDY. The max_size is the
// number of MRU servers that support SPDY that are to be returned.
void GetSpdyServerList(base::ListValue* spdy_server_list,
size_t max_size) const;
// Returns flattened string representation of the |host_port_pair|. Used by
// unittests.
static std::string GetFlattenedSpdyServer(const HostPortPair& host_port_pair);
// Debugging to simulate presence of an AlternateProtocol.
// If we don't have an alternate protocol in the map for any given host/port
// pair, force this ProtocolPortPair.
static void ForceAlternateProtocol(const AlternateProtocolInfo& pair);
static void DisableForcedAlternateProtocol();
// Returns the canonical host suffix for |server|, or std::string() if none
// exists.
std::string GetCanonicalSuffix(const HostPortPair& server);
// -----------------------------
// HttpServerProperties methods:
// -----------------------------
// Gets a weak pointer for this object.
base::WeakPtr<HttpServerProperties> GetWeakPtr() override;
// Deletes all data.
void Clear() override;
// Returns true if |server| supports SPDY.
bool SupportsSpdy(const HostPortPair& server) override;
// Add |server| into the persistent store.
void SetSupportsSpdy(const HostPortPair& server, bool support_spdy) override;
// Returns true if |server| has required HTTP/1.1 via HTTP/2 error code.
bool RequiresHTTP11(const HostPortPair& server) override;
// Require HTTP/1.1 on subsequent connections. Not persisted.
void SetHTTP11Required(const HostPortPair& server) override;
// Modify SSLConfig to force HTTP/1.1 if necessary.
void MaybeForceHTTP11(const HostPortPair& server,
SSLConfig* ssl_config) override;
// Returns true if |server| has an Alternate-Protocol header.
bool HasAlternateProtocol(const HostPortPair& server) override;
// Returns the Alternate-Protocol and port for |server|.
// HasAlternateProtocol(server) must be true.
AlternateProtocolInfo GetAlternateProtocol(
const HostPortPair& server) override;
// Sets the Alternate-Protocol for |server|.
void SetAlternateProtocol(const HostPortPair& server,
uint16 alternate_port,
AlternateProtocol alternate_protocol,
double probability) override;
// Sets the Alternate-Protocol for |server| to be BROKEN.
void SetBrokenAlternateProtocol(const HostPortPair& server) override;
// Returns true if Alternate-Protocol for |server| was recently BROKEN.
bool WasAlternateProtocolRecentlyBroken(const HostPortPair& server) override;
// Confirms that Alternate-Protocol for |server| is working.
void ConfirmAlternateProtocol(const HostPortPair& server) override;
// Clears the Alternate-Protocol for |server|.
void ClearAlternateProtocol(const HostPortPair& server) override;
// Returns all Alternate-Protocol mappings.
const AlternateProtocolMap& alternate_protocol_map() const override;
void SetAlternateProtocolProbabilityThreshold(double threshold) override;
// Gets a reference to the SettingsMap stored for a host.
// If no settings are stored, returns an empty SettingsMap.
const SettingsMap& GetSpdySettings(
const HostPortPair& host_port_pair) override;
// Saves an individual SPDY setting for a host. Returns true if SPDY setting
// is to be persisted.
bool SetSpdySetting(const HostPortPair& host_port_pair,
SpdySettingsIds id,
SpdySettingsFlags flags,
uint32 value) override;
// Clears all entries in |spdy_settings_map_| for a host.
void ClearSpdySettings(const HostPortPair& host_port_pair) override;
// Clears all entries in |spdy_settings_map_|.
void ClearAllSpdySettings() override;
// Returns all persistent SPDY settings.
const SpdySettingsMap& spdy_settings_map() const override;
// Methods for SupportsQuic.
SupportsQuic GetSupportsQuic(
const HostPortPair& host_port_pair) const override;
void SetSupportsQuic(const HostPortPair& host_port_pair,
bool used_quic,
const std::string& address) override;
const SupportsQuicMap& supports_quic_map() const override;
// Methods for ServerNetworkStats.
void SetServerNetworkStats(const HostPortPair& host_port_pair,
ServerNetworkStats stats) override;
const ServerNetworkStats* GetServerNetworkStats(
const HostPortPair& host_port_pair) override;
const ServerNetworkStatsMap& server_network_stats_map() const override;
// |spdy_servers_map_| has flattened representation of servers (host, port)
// that either support or not support SPDY protocol.
typedef base::MRUCache<std::string, bool> SpdyServerHostPortMap;
typedef std::map<HostPortPair, HostPortPair> CanonicalHostMap;
typedef std::vector<std::string> CanonicalSufficList;
typedef std::set<HostPortPair> Http11ServerHostPortSet;
// List of broken host:ports and the times when they can be expired.
struct BrokenAlternateProtocolEntry {
HostPortPair server;
base::TimeTicks when;
typedef std::list<BrokenAlternateProtocolEntry>
// Map from host:port to the number of times alternate protocol has
// been marked broken.
typedef std::map<HostPortPair, int> BrokenAlternateProtocolMap;
// Return the iterator for |server|, or for its canonical host, or end.
AlternateProtocolMap::const_iterator GetAlternateProtocolIterator(
const HostPortPair& server);
// Return the canonical host for |server|, or end if none exists.
CanonicalHostMap::const_iterator GetCanonicalHost(HostPortPair server) const;
void RemoveCanonicalHost(const HostPortPair& server);
void ExpireBrokenAlternateProtocolMappings();
void ScheduleBrokenAlternateProtocolMappingsExpiration();
SpdyServerHostPortMap spdy_servers_map_;
Http11ServerHostPortSet http11_servers_;
AlternateProtocolMap alternate_protocol_map_;
BrokenAlternateProtocolList broken_alternate_protocol_list_;
BrokenAlternateProtocolMap broken_alternate_protocol_map_;
SpdySettingsMap spdy_settings_map_;
SupportsQuicMap supports_quic_map_;
ServerNetworkStatsMap server_network_stats_map_;
// Contains a map of servers which could share the same alternate protocol.
// Map from a Canonical host/port (host is some postfix of host names) to an
// actual origin, which has a plausible alternate protocol mapping.
CanonicalHostMap canonical_host_to_origin_map_;
// Contains list of suffixes (for exmaple "",
// "", "") of canonical hostnames.
CanonicalSufficList canonical_suffixes_;
double alternate_protocol_probability_threshold_;
base::WeakPtrFactory<HttpServerPropertiesImpl> weak_ptr_factory_;
} // namespace net