android - 由于没有系统实现，PAC支持被禁用

我最近将Nexus 4升级到了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

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

最佳答案

我认为您可以放心地忽略这一点。它在Chromium浏览器引擎中有点硬编码。

如果您检查Chromium来源(https://chromium.googlesource.com/chromium/src.git/+/master/net/proxy/proxy_service.cc)并查看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，则ProxyResolverFactoryForSystem::IsSupported()仅返回false

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

关于android - 由于没有系统实现，PAC支持被禁用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/20557708/