CODEWITHSUNDEEP
gohttps
Sathya
Sathya

Reputation: 1086

Golang - TLS handshake error

I am running a https web server in go. I am testing it using a angular web app (Chrome browser) that makes ajax calls to the web server.

If I keep hitting the web server continuously everything seems working. But whenever I leave it idle for sometime and hit the web server the ajax call from browser doesn't get a response. Almost always I see this log line in my server log.

2016/01/16 04:06:47.006977 http: TLS handshake error from 42.21.139.47:51463: EOF

I can confirm that the IP address is my IP address.

I am starting my https server like this:

r := mux.NewRouter()
r.HandleFunc("/status", handleStatus)
setUpLoginEndpoint(&cfg.Session, r)
setUpLogoutEndpoint(cfg.Session.CookieName, r)
setUpChangePasswordEndpoint(cfg.Session.CookieName, r)
setUpMetricSinkEndpoint(cfg.Metric.SinkApiKey, r)
setUpMetricQueryEndpoint(cfg.Session.CookieName, r)
http.ListenAndServeTLS(":443", "../cert.pem", "../keys.pem", &Server{r})

I can confirm that I am closing the request body in every handler using defer r.Body.Close().

I am using go 1.5.2.

Any help would be appreciated.

Regards,

Sathya

Upvotes: 11

Views: 34319

Answers (2)

adavea
adavea

Reputation: 1622

I was receiving the same error as OP, but in my case the TLSHandshakeTimeout value I was specifying was too low. I'm not sure what an appropriate value is but moving it to 700ms from 100ms eliminated the error for me. For others experiencing the same error and who are specifying non-default http.Transport config values in their http.Client setup, you might want to make sure your TLSHandshakeTimeout is set to a high enough value.

&http.Client{
  Transport: &http.Transport{
    TLSHandshakeTimeout:   700 * time.Millisecond, //<-- I was receiving OP's error when I had this set to 100ms
  }
}

Upvotes: 1

Sathya
Sathya

Reputation: 1086

I enabled tcp keepalive and this problem got solved. I was running my VM in google compute engine and probably the firewall terminated idle connections.

TCP Keep alive

Configuring tcp keep alive in linux

Golang http server automatically picked this up, so no change was required in my golang code.

Regards,

Sathya

Upvotes: 10

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