Golang Transport.MaxIdleConnsPerHost方法代碼示例

// Creates a new HTTP connection pool using the given address and pool parameters.
//
// 'addr' is a net.Dial()-style 'host:port' destination for making the TCP connection for
// HTTP/HTTPS traffic.  It will be used as the hostname by default for virtual hosting
// and SSL certificate validation; if you'd like to use a different hostname,
// set params.HostHeader.
func NewSimplePool(addr string, params ConnectionParams) *SimplePool {
	pool := &SimplePool{
		addr:   addr,
		params: params,
		client: new(http.Client),
	}

	// setup HTTP transport
	transport := new(http.Transport)
	transport.ResponseHeaderTimeout = params.ResponseTimeout
	transport.MaxIdleConnsPerHost = params.MaxIdle
	transport.Proxy = http.ProxyFromEnvironment
	if params.Dial == nil {
		// dialTimeout could only be used in none proxy requests since it talks directly
		// to pool.addr
		if getenvEitherCase("HTTP_PROXY") == "" {
			transport.Dial = pool.dialTimeout
		}
	} else {
		transport.Dial = params.Dial
	}
	pool.transport = transport
	pool.client.Transport = transport

	if params.UseSSL && params.SkipVerifySSL {
		transport.TLSClientConfig = &tls.Config{
			InsecureSkipVerify: true,
		}
	}

	return pool
}

// Creates a new HTTP connection pool using the given address and pool parameters.
//
// 'addr' is a net.Dial()-style 'host:port' destination for making the TCP connection for
// HTTP/HTTPS traffic.  It will be used as the hostname by default for virtual hosting
// and SSL certificate validation; if you'd like to use a different hostname,
// set params.HostHeader.
func NewSimplePool(addr string, params ConnectionParams) *SimplePool {
	pool := &SimplePool{
		addr:   addr,
		params: params,
		client: new(http.Client),
	}

	// It's desirable to enforce the timeout at the client-level since it
	// includes the connection time, redirects and the time to finish reading
	// the full response. Unlike ResponseHeaderTimeout supported by
	// `http.Transport` which merely accounts for the timeout to receive the
	// first response header byte. It ignores the time to send the request or
	// the time to read the full response.
	pool.client.Timeout = params.ResponseTimeout

	// setup HTTP transport
	transport := new(http.Transport)
	transport.ResponseHeaderTimeout = params.ResponseTimeout
	transport.MaxIdleConnsPerHost = params.MaxIdle

	if params.Proxy != nil {
		transport.Proxy = params.Proxy
	} else {
		transport.Proxy = http.ProxyFromEnvironment
	}

	if params.Dial == nil {
		// dialTimeout could only be used in none proxy requests since it talks directly
		// to pool.addr
		if getenvEitherCase("HTTP_PROXY") == "" && params.Proxy == nil {
			transport.Dial = pool.dialTimeout
		}
	} else {
		transport.Dial = params.Dial
	}
	pool.transport = transport
	pool.client.Transport = transport

	if params.UseSSL && params.SkipVerifySSL {
		transport.TLSClientConfig = &tls.Config{
			InsecureSkipVerify: true,
		}
	}

	return pool
}

func newHttpTransporter() (trans *httpTransporter) {
	tr := new(http.Transport)
	tr.DisableCompression = true
	tr.DisableKeepAlives = false
	tr.MaxIdleConnsPerHost = 4
	jar := cookieJar
	if DisableGlobalCookie {
		jar, _ = cookiejar.New(nil)
	}
	client := new(http.Client)
	client.Jar = jar
	client.Transport = tr
	trans = new(httpTransporter)
	trans.Client = client
	trans.Header = new(http.Header)
	return
}

func newHttpClient(config *Config) *http.Client {
	transport := new(http.Transport)

	if defaultTransport, ok := http.DefaultTransport.(*http.Transport); ok {
		transport.Proxy = defaultTransport.Proxy
		transport.Dial = defaultTransport.Dial
		transport.TLSHandshakeTimeout = defaultTransport.TLSHandshakeTimeout
	}

	if config.ProxyHost != "" {
		host := config.ProxyHost

		if config.ProxyPort > 0 {
			host += ":" + strconv.Itoa(config.ProxyPort)
		}

		proxyUrl, err := url.Parse(util.HostToURL(host, "http"))

		if err != nil {
			panic(err)
		}

		transport.Proxy = http.ProxyURL(proxyUrl)
	}

	/*
		if c.ConnectionTimeout > 0 {
			transport.TLSHandshakeTimeout = c.ConnectionTimeout
		}
	*/

	if config.MaxConnections > 0 {
		transport.MaxIdleConnsPerHost = config.MaxConnections
	}

	return &http.Client{
		Transport: transport,
		Timeout:   config.Timeout,
	}
}

// Transport returns an http.RoundTripper with the correct timeouts
func (ci *ConfigInfo) Transport() http.RoundTripper {
	noTransport.Do(func() {
		// Start with a sensible set of defaults then override.
		// This also means we get new stuff when it gets added to go
		t := new(http.Transport)
		setDefaults(t, http.DefaultTransport.(*http.Transport))
		t.Proxy = http.ProxyFromEnvironment
		t.MaxIdleConnsPerHost = 4 * (ci.Checkers + ci.Transfers + 1)
		t.TLSHandshakeTimeout = ci.ConnectTimeout
		t.ResponseHeaderTimeout = ci.Timeout
		t.TLSClientConfig = &tls.Config{InsecureSkipVerify: ci.InsecureSkipVerify}
		t.DisableCompression = *noGzip
		// Set in http_old.go initTransport
		//   t.Dial
		// Set in http_new.go initTransport
		//   t.DialContext
		//   t.IdelConnTimeout
		//   t.ExpectContinueTimeout
		ci.initTransport(t)
		// Wrap that http.Transport in our own transport
		transport = NewTransport(t, ci.DumpHeaders, ci.DumpBodies)
	})
	return transport
}