流式传输HTTP客户端的时间很长，直到第一个响应字节

Question

I'm trying to write a Go HTTP client intended to stream event data from a HTTP server. My problem is that the first byte of the response could take hours before I get it, this includes the response headers. It's even possible I never get a response.

I currently get net/http: request canceled (Client.Timeout exceeded while awaiting headers) using this client:

Client = &http.Client{
    Transport: &http.Transport{
        Dial: (&net.Dialer{                                                                         
            Timeout:   0,
            KeepAlive: 30 * time.Second,
        }).Dial,
        Proxy: http.ProxyURL(proxyUrl),
        ResponseHeaderTimeout: 0,
    },
    Timeout: 0,
}

I cannot think of any more timeouts to set to zero in order for my connection to not timeout. What am I missing?

I'm using go version go1.8 linux/amd64.

Edit 1: I have no possibility to change the server for which i'm writing a client.

Answer 1

I figured out that in the default http client, the timeouts i set to zero are already zero. So removing those from my own client leaves

Client = &http.Client{
    Transport: &http.Transport{
        Dial: (&net.Dialer{                                                                         
            KeepAlive: 30 * time.Second,
        }).Dial,
        Proxy: http.ProxyURL(proxyUrl),
    },
}

The keep alive option in Dial doesn't seem to have anything to do with it either. This leaves the proxy.

In the proxy implementation i found a client with timeout as such:

client := &http.Client{
    Timeout: 30 * time.Second,
}

Removing that timeout solved my problem.