PAC支持已禁用,因为没有系统实现

Question

我最近将Nexus 4升级到Android 4.4.在调试我的应用程序时,我发现了消息W/chromium(14962): [WARNING:proxy_service.cc(888)] PAC support disabled because there is no system implementation

这是什么意思 ？

---

logcat的

12-12 17:38:56.726: V/WebViewChromium(14962): Binding Chromium to the main looper Looper{41f91588}
12-12 17:38:56.736: I/chromium(14962): [INFO:library_loader_hooks.cc(112)] Chromium logging enabled: level = 0, default verbosity = 0
12-12 17:38:56.736: I/BrowserProcessMain(14962): Initializing chromium process, renderers=0
12-12 17:38:56.746: W/chromium(14962): [WARNING:proxy_service.cc(888)] PAC support disabled because there is no system implementation

Answer 1

我想你可以放心地忽略这个.它在Chromium Browser Engine中有点硬编码.

如果您查看Chromium来源(https://chromium.googlesource.com/chromium/src.git/+/master/net/proxy/proxy_service.cc)并看到ProxyService::CreateUsingSystemProxyResolver您会发现

if (!ProxyResolverFactoryForSystem::IsSupported()) {
  LOG(WARNING) << "PAC support disabled because there is no "
                "system implementation";
  return CreateWithoutProxyResolver(proxy_config_service, net_log);
}

如果您不在Windows或MacOS上,那么ProxyResolverFactoryForSystem::IsSupported()它就在哪里返回false

class ProxyResolverFactoryForSystem : public ProxyResolverFactory {
  //[...]
  static bool IsSupported() {
#if defined(OS_WIN) || defined(OS_MACOSX)
    return true;
#else
    return false;
#endif
  }
};