[iOS] Websocket doesn't using system proxy settings

[bill2004158]

Description

Fetch/Ajax can connect to our server with system proxy settings. however, websocket always connect fail.

React Native version:

0.62

Expected Results

websocket should connect servers like fetch/ajax using system proxy settings.

[bill2004158]

https://github.com/facebook/react-native/blob/master/Libraries/WebSocket/RCTSRWebSocket.m#L497 after created readStream,

then it should read system proxy settings: CFDictionaryRef proxySettings = CFNetworkCopySystemProxySettings();

and apply to socket if has proxy: CFReadStreamSetProperty((CFReadStreamRef)readStream, kCFStreamPropertySOCKSProxy, (CFTypeRef)proxyToUse);

[hanayashiki]

Any news on that?

[hanayashiki]

I don't know why everybody doesn't need such a proxy, for me the following code works:

I edited https://github.com/facebook/react-native/blob/master/Libraries/WebSocket/RCTSRWebSocket.m#L497 as below

  CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readStream, &writeStream);
    
  CFDictionaryRef proxySettings = CFNetworkCopySystemProxySettings();
  
  if (CFDictionaryContainsKey(proxySettings, kCFStreamPropertySOCKSProxyHost)) {
    CFReadStreamSetProperty((CFReadStreamRef)readStream, kCFStreamPropertySOCKSProxy, (CFTypeRef)proxySettings);
    CFReadStreamSetProperty((CFReadStreamRef)writeStream, kCFStreamPropertySOCKSProxy, (CFTypeRef)proxySettings);
  }

  _outputStream = CFBridgingRelease(writeStream);
  _inputStream = CFBridgingRelease(readStream);

And it works like a charm. Little tips: For working with Charles proxy, you need to enable SOCKS Proxy which seems not enabled by default

[shaikhalid]

Hi everyone, I am facing this exact problem. I am using expo, and hence I created an issue on expo but @Kudo mentioned that once react-native integrates this fix to their SDK it should come to expo.

Can someone please help me understand if there is any timelines for this.

[hanayashiki]

Hi everyone, I am facing this exact problem. I am using expo, and hence I created an issue on expo but @Kudo mentioned that once react-native integrates this fix to their SDK it should come to expo.

Can someone please help me understand if there is any timelines for this.

no, there isn't. patch/fork your own version of react-native because facebook engineers don't have the time