请教一个http 问题

写了一个socks5代理检查功能 编译成dll给其他语言调用 发现前500连接正常返回 后面直接报错 请问怎样解决？ err：Get http://api.guajicun.com/getip/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers) ================分割线================== func main() { for i := 0; i < 1000; i++ { go Socks5Tcp("xxx", "user", "user", 3000) } } func Socks5Tcp(host, user, pass string, out int) string { // create a socks5 dialer dialer, err := proxy.SOCKS5("tcp", host, &proxy.Auth{user, pass}, proxy.Direct) if err != nil { return fmt.Sprintf("error:%v", err) } // setup a http client httpTransport := &http.Transport{} httpClient := &http.Client{Transport: httpTransport, Timeout: time.Millisecond * time.Duration(out)} // set our socks5 as the dialer httpTransport.Dial = dialer.Dial resp, err := httpClient.Get("http://api.guajicun.com/getip/") if err != nil { return fmt.Sprintf("error:%v", err) } defer resp.Body.Close() body, err := ioutil.ReadAll(resp.Body) if err != nil { return fmt.Sprintf("error:%v", err) } // success return fmt.Sprintf("success:%s", body) }