add support for using socks proxy

jiracli/socksproxy.go

@@ -0,0 +1,31 @@
+package jiracli
+
+import (
+	"net"
+	"net/http"
+	"time"
+
+	"golang.org/x/net/proxy"
+)
+
+func socksProxy(address string) *http.Transport {
+	return newSocksProxyTransport(address)
+}
+
+func newSocksProxyTransport(address string) *http.Transport {
+	dialer, err := proxy.SOCKS5("tcp", address, nil, proxy.Direct)
+	if err != nil {
+		// TODO: whoops, return error?
+		panic(err)
+	}
+	dial := func(network, addr string) (net.Conn, error) {
+		return dialer.Dial(network, addr)
+	}
+
+	return &http.Transport{
+		Dial:                  dial,
+		DisableKeepAlives:     true,
+		ResponseHeaderTimeout: 30 * time.Second,
+		ExpectContinueTimeout: 10 * time.Second,
+	}
+}