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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef NET_PROXY_PROXY_SCRIPT_DECIDER_H_ | |
| 6 #define NET_PROXY_PROXY_SCRIPT_DECIDER_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 #include <vector> | |
| 10 | |
| 11 #include "base/memory/ref_counted.h" | |
| 12 #include "base/strings/string16.h" | |
| 13 #include "base/time/time.h" | |
| 14 #include "base/timer/timer.h" | |
| 15 #include "net/base/address_list.h" | |
| 16 #include "net/base/completion_callback.h" | |
| 17 #include "net/base/net_export.h" | |
| 18 #include "net/base/net_log.h" | |
| 19 #include "net/dns/host_resolver.h" | |
| 20 #include "net/dns/single_request_host_resolver.h" | |
| 21 #include "net/proxy/proxy_config.h" | |
| 22 #include "net/proxy/proxy_resolver.h" | |
| 23 #include "url/gurl.h" | |
| 24 | |
| 25 namespace net { | |
| 26 | |
| 27 class DhcpProxyScriptFetcher; | |
| 28 class NetLogParameter; | |
| 29 class ProxyResolver; | |
| 30 class ProxyScriptFetcher; | |
| 31 | |
| 32 // ProxyScriptDecider is a helper class used by ProxyService to determine which | |
| 33 // PAC script to use given our proxy configuration. | |
| 34 // | |
| 35 // This involves trying to use PAC scripts in this order: | |
| 36 // | |
| 37 // (1) WPAD (DHCP) if auto-detect is on. | |
| 38 // (2) WPAD (DNS) if auto-detect is on. | |
| 39 // (3) Custom PAC script if a URL was given. | |
| 40 // | |
| 41 // If no PAC script was successfully selected, then it fails with either a | |
| 42 // network error, or PAC_SCRIPT_FAILED (indicating it did not pass our | |
| 43 // validation). | |
| 44 // | |
| 45 // On successful completion, the fetched PAC script data can be accessed using | |
| 46 // script_data(). | |
| 47 // | |
| 48 // Deleting ProxyScriptDecider while Init() is in progress, will | |
| 49 // cancel the request. | |
| 50 // | |
| 51 class NET_EXPORT_PRIVATE ProxyScriptDecider { | |
| 52 public: | |
| 53 // |proxy_script_fetcher|, |dhcp_proxy_script_fetcher| and | |
| 54 // |net_log| must remain valid for the lifespan of ProxyScriptDecider. | |
| 55 ProxyScriptDecider(ProxyScriptFetcher* proxy_script_fetcher, | |
| 56 DhcpProxyScriptFetcher* dhcp_proxy_script_fetcher, | |
| 57 NetLog* net_log); | |
| 58 | |
| 59 // Aborts any in-progress request. | |
| 60 ~ProxyScriptDecider(); | |
| 61 | |
| 62 // Evaluates the effective proxy settings for |config|, and downloads the | |
| 63 // associated PAC script. | |
| 64 // If |wait_delay| is positive, the initialization will pause for this | |
| 65 // amount of time before getting started. | |
| 66 // On successful completion, the "effective" proxy settings we ended up | |
| 67 // deciding on will be available vial the effective_settings() accessor. | |
| 68 // Note that this may differ from |config| since we will have stripped any | |
| 69 // manual settings, and decided whether to use auto-detect or the custom PAC | |
| 70 // URL. Finally, if auto-detect was used we may now have resolved that to a | |
| 71 // specific script URL. | |
| 72 int Start(const ProxyConfig& config, | |
| 73 const base::TimeDelta wait_delay, | |
| 74 bool fetch_pac_bytes, | |
| 75 const net::CompletionCallback& callback); | |
| 76 | |
| 77 const ProxyConfig& effective_config() const; | |
| 78 | |
| 79 // TODO(eroman): Return a const-pointer. | |
| 80 ProxyResolverScriptData* script_data() const; | |
| 81 | |
| 82 void set_quick_check_enabled(bool enabled) { | |
| 83 quick_check_enabled_ = enabled; | |
| 84 } | |
| 85 | |
| 86 bool quick_check_enabled() const { return quick_check_enabled_; } | |
| 87 | |
| 88 private: | |
| 89 // Represents the sources from which we can get PAC files; two types of | |
| 90 // auto-detect or a custom URL. | |
| 91 struct PacSource { | |
| 92 enum Type { | |
| 93 WPAD_DHCP, | |
| 94 WPAD_DNS, | |
| 95 CUSTOM | |
| 96 }; | |
| 97 | |
| 98 PacSource(Type type, const GURL& url) | |
| 99 : type(type), url(url) {} | |
| 100 | |
| 101 // Returns a Value representing the PacSource. |effective_pac_url| must | |
| 102 // be non-NULL and point to the URL derived from information contained in | |
| 103 // |this|, if Type is not WPAD_DHCP. | |
| 104 base::Value* NetLogCallback(const GURL* effective_pac_url, | |
| 105 NetLog::LogLevel log_level) const; | |
| 106 | |
| 107 Type type; | |
| 108 GURL url; // Empty unless |type == PAC_SOURCE_CUSTOM|. | |
| 109 }; | |
| 110 | |
| 111 typedef std::vector<PacSource> PacSourceList; | |
| 112 | |
| 113 enum State { | |
| 114 STATE_NONE, | |
| 115 STATE_WAIT, | |
| 116 STATE_WAIT_COMPLETE, | |
| 117 STATE_QUICK_CHECK, | |
| 118 STATE_QUICK_CHECK_COMPLETE, | |
| 119 STATE_FETCH_PAC_SCRIPT, | |
| 120 STATE_FETCH_PAC_SCRIPT_COMPLETE, | |
| 121 STATE_VERIFY_PAC_SCRIPT, | |
| 122 STATE_VERIFY_PAC_SCRIPT_COMPLETE, | |
| 123 }; | |
| 124 | |
| 125 // Returns ordered list of PAC urls to try for |config|. | |
| 126 PacSourceList BuildPacSourcesFallbackList(const ProxyConfig& config) const; | |
| 127 | |
| 128 void OnIOCompletion(int result); | |
| 129 int DoLoop(int result); | |
| 130 void DoCallback(int result); | |
| 131 | |
| 132 int DoWait(); | |
| 133 int DoWaitComplete(int result); | |
| 134 | |
| 135 int DoQuickCheck(); | |
| 136 int DoQuickCheckComplete(int result); | |
| 137 | |
| 138 int DoFetchPacScript(); | |
| 139 int DoFetchPacScriptComplete(int result); | |
| 140 | |
| 141 int DoVerifyPacScript(); | |
| 142 int DoVerifyPacScriptComplete(int result); | |
| 143 | |
| 144 // Tries restarting using the next fallback PAC URL: | |
| 145 // |pac_sources_[++current_pac_source_index]|. | |
| 146 // Returns OK and rewinds the state machine when there | |
| 147 // is something to try, otherwise returns |error|. | |
| 148 int TryToFallbackPacSource(int error); | |
| 149 | |
| 150 // Gets the initial state (we skip fetching when the | |
| 151 // ProxyResolver doesn't |expect_pac_bytes()|. | |
| 152 State GetStartState() const; | |
| 153 | |
| 154 void DetermineURL(const PacSource& pac_source, GURL* effective_pac_url); | |
| 155 | |
| 156 // Returns the current PAC URL we are fetching/testing. | |
| 157 const PacSource& current_pac_source() const; | |
| 158 | |
| 159 void OnWaitTimerFired(); | |
| 160 void DidComplete(); | |
| 161 void Cancel(); | |
| 162 | |
| 163 ProxyScriptFetcher* proxy_script_fetcher_; | |
| 164 DhcpProxyScriptFetcher* dhcp_proxy_script_fetcher_; | |
| 165 | |
| 166 net::CompletionCallback callback_; | |
| 167 | |
| 168 size_t current_pac_source_index_; | |
| 169 | |
| 170 // Filled when the PAC script fetch completes. | |
| 171 base::string16 pac_script_; | |
| 172 | |
| 173 // Flag indicating whether the caller requested a mandatory pac script | |
| 174 // (i.e. fallback to direct connections are prohibited). | |
| 175 bool pac_mandatory_; | |
| 176 | |
| 177 // Whether we have an existing custom PAC URL. | |
| 178 bool have_custom_pac_url_; | |
| 179 | |
| 180 PacSourceList pac_sources_; | |
| 181 State next_state_; | |
| 182 | |
| 183 BoundNetLog net_log_; | |
| 184 | |
| 185 bool fetch_pac_bytes_; | |
| 186 | |
| 187 base::TimeDelta wait_delay_; | |
| 188 base::OneShotTimer<ProxyScriptDecider> wait_timer_; | |
| 189 | |
| 190 // Whether to do DNS quick check | |
| 191 bool quick_check_enabled_; | |
| 192 | |
| 193 // Results. | |
| 194 ProxyConfig effective_config_; | |
| 195 scoped_refptr<ProxyResolverScriptData> script_data_; | |
| 196 | |
| 197 AddressList wpad_addresses_; | |
| 198 base::OneShotTimer<ProxyScriptDecider> quick_check_timer_; | |
| 199 scoped_ptr<SingleRequestHostResolver> host_resolver_; | |
| 200 base::Time quick_check_start_time_; | |
| 201 | |
| 202 DISALLOW_COPY_AND_ASSIGN(ProxyScriptDecider); | |
| 203 }; | |
| 204 | |
| 205 } // namespace net | |
| 206 | |
| 207 #endif // NET_PROXY_PROXY_SCRIPT_DECIDER_H_ | |
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Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master