mirror of
https://github.com/hanzozt/transport.git
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zeekay
e1132e7910
- Repo names: ziti-* → zt-* - Go modules: github.com/hanzozt/ziti → github.com/hanzozt/zt - Docker images: hanzozt/ziti-* → hanzozt/zt-* - C/Java/JS symbols: ziti_* → zt_* - File and directory names updated
115 lines
2.9 KiB
Go
115 lines
2.9 KiB
Go
/*
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Copyright NetFoundry Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package proxies
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import (
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"bufio"
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"context"
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"github.com/michaelquigley/pfxlog"
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"github.com/pkg/errors"
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"golang.org/x/net/proxy"
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"io"
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"net"
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"net/http"
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"net/url"
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"time"
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)
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func NewHttpConnectProxyDialer(dialer proxy.Dialer, addr string, auth *proxy.Auth, timeout time.Duration) *HttpConnectProxyDialer {
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return &HttpConnectProxyDialer{
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dialer: dialer,
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address: addr,
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auth: auth,
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timeout: timeout,
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}
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}
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type HttpConnectProxyDialer struct {
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dialer proxy.Dialer
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address string
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auth *proxy.Auth
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timeout time.Duration
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}
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func (self *HttpConnectProxyDialer) Dial(network, addr string) (net.Conn, error) {
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dialer := self.dialer
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if dialer == nil {
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dialer = &net.Dialer{Timeout: self.timeout}
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}
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c, err := dialer.Dial(network, self.address)
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if err != nil {
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return nil, errors.Wrapf(err, "unable to connect to proxy server at %s", self.address)
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}
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if err = self.Connect(c, addr); err != nil {
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if closeErr := c.Close(); closeErr != nil {
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pfxlog.Logger().WithError(closeErr).Error("failed to close connection to proxy after connect error")
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}
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return nil, err
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}
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return c, nil
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}
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func (self *HttpConnectProxyDialer) Connect(c net.Conn, addr string) error {
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log := pfxlog.Logger()
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log.Debugf("create connect request to %s", addr)
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ctx := context.Background()
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if self.timeout > 0 {
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timeoutCtx, cancelF := context.WithTimeout(ctx, self.timeout)
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defer cancelF()
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ctx = timeoutCtx
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}
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req := &http.Request{
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Method: http.MethodConnect,
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URL: &url.URL{Host: addr},
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Host: addr,
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Header: http.Header{},
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Close: false,
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}
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req = req.WithContext(ctx)
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if self.auth != nil {
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req.SetBasicAuth(self.auth.User, self.auth.Password)
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}
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req.Header.Set("User-Agent", "zt-transport")
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if err := req.Write(c); err != nil {
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return errors.Wrapf(err, "unable to send connect request to proxy server at %s", self.address)
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}
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resp, err := http.ReadResponse(bufio.NewReader(c), req)
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if err != nil {
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return errors.Wrapf(err, "unable to read response to connect request to proxy server at %s", self.address)
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}
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defer func() {
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log.Debug("closing resp body")
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_ = resp.Body.Close()
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}()
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if resp.StatusCode != http.StatusOK {
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respBody, _ := io.ReadAll(resp.Body)
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log.Errorf("proxy returned: %s", string(respBody))
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return errors.Errorf("received %v instead of 200 OK in response to connect request to proxy server at %s", resp.StatusCode, self.address)
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}
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return nil
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}
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