OkHTTP Websocket: Unexpected end of steam on Connection

问题

I'm trying to connect to the Stack Exchange chat Websocket. The websocket is used to receive new events in the chat, such as new messages.

Here's the code used to create the Websocket:

String wsUrl = getWsUrl();
Request wsRequest = new Request.Builder()
        .url(wsUrl)
        .build();
WebSocketCall wsCall = WebSocketCall.create(httpClient, wsRequest);
wsCall.enqueue(new ChatWebSocketListener());

The websocket URL is in this form:

wss://chat.sockets.stackexchange.com/events/16/4b3a8a1f68704b8db35ce9f0915c7c45

The WebSocketListener receives a onFailure response only, with this exception:

E/IOException﹕ unexpected end of stream on Connection{chat.sockets.stackexchange.com:443, proxy=DIRECT@ hostAddress=192.111.0.32 cipherSuite=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 protocol=http/1.1} (recycle count=0)
    java.io.IOException: unexpected end of stream on Connection{chat.sockets.stackexchange.com:443, proxy=DIRECT@ hostAddress=192.111.0.32 cipherSuite=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 protocol=http/1.1} (recycle count=0)
            at com.squareup.okhttp.internal.http.HttpConnection.readResponse(HttpConnection.java:211)
            at com.squareup.okhttp.internal.http.HttpTransport.readResponseHeaders(HttpTransport.java:80)
            at com.squareup.okhttp.internal.http.HttpEngine.readNetworkResponse(HttpEngine.java:917)
            at com.squareup.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:757)
            at com.squareup.okhttp.Call.getResponse(Call.java:274)
            at com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:230)
            at com.squareup.okhttp.Call.getResponseWithInterceptorChain(Call.java:201)
            at com.squareup.okhttp.Call.access$100(Call.java:36)
            at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:164)
            at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:831)
     Caused by: java.io.EOFException: \n not found: size=0 content=...
            at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:200)
            at com.squareup.okhttp.internal.http.HttpConnection.readResponse(HttpConnection.java:191)
            at com.squareup.okhttp.internal.http.HttpTransport.readResponseHeaders(HttpTransport.java:80)
            at com.squareup.okhttp.internal.http.HttpEngine.readNetworkResponse(HttpEngine.java:917)
            at com.squareup.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:757)
            at com.squareup.okhttp.Call.getResponse(Call.java:274)
            at com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:230)
            at com.squareup.okhttp.Call.getResponseWithInterceptorChain(Call.java:201)
            at com.squareup.okhttp.Call.access$100(Call.java:36)
            at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:164)
            at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:831)

I'm not sure what I'm doing wrong here, or how to interperet this exception. What's wrong with this websocket, and how can I fix it?

回答1:

The chat websocket server disregards the request unless it has both:

A url param l, corresponding to a value sent back when the list of events is loaded.
A header Origin set to "http://stackexchange.com".

You just have to add those to your request:

Request wsRequest = new Request.Builder()
        .url(wsUrl+"?l=" + valueFromLoadingEvents)
        .addHeader("Origin", "http://stackexchange.com")
        .build();

来源：https://stackoverflow.com/questions/32161398/okhttp-websocket-unexpected-end-of-steam-on-connection

标签

android

websocket

okhttp