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relaymessage.go
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relaymessage.go
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package netrelay
import (
"bufio"
"bytes"
"context"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/http/httputil"
"strings"
"github.com/gauss-project/aurorafs/pkg/aurora"
"github.com/gauss-project/aurorafs/pkg/boson"
"github.com/gauss-project/aurorafs/pkg/multicast/model"
"github.com/gauss-project/aurorafs/pkg/netrelay/pb"
"github.com/gauss-project/aurorafs/pkg/p2p"
"github.com/gauss-project/aurorafs/pkg/p2p/protobuf"
)
const (
protocolName = "netrelay"
protocolVersion = "2.0.0"
streamRelayHttpReq = "httpreq" // v1 http proxy
streamRelayHttpReqV2 = "httpreqv2" // v2 http proxy support ws
)
func (s *Service) Protocol() p2p.ProtocolSpec {
return p2p.ProtocolSpec{
Name: protocolName,
Version: protocolVersion,
StreamSpecs: []p2p.StreamSpec{
{
Name: streamRelayHttpReq,
Handler: s.relayHttpReq,
},
{
Name: streamRelayHttpReqV2,
Handler: s.onRelayHttpReqV2,
},
},
}
}
// Deprecated
func (s *Service) relayHttpReq(ctx context.Context, p p2p.Peer, stream p2p.Stream) (err error) {
var httpResp pb.RelayHttpResp
w, r := protobuf.NewWriterAndReader(stream)
defer func() {
if err != nil {
_ = stream.Reset()
} else {
go stream.FullClose()
}
}()
reqWriter := func(resp pb.RelayHttpResp) error {
if err = w.WriteMsgWithContext(ctx, &resp); err != nil {
s.logger.Errorf("relayHttpReq: write resp to %s err %w", p.Address, err)
return fmt.Errorf("write resp: %w", err)
}
return nil
}
var httpReq pb.RelayHttpReq
if err = r.ReadMsgWithContext(ctx, &httpReq); err != nil {
s.logger.Errorf("relayHttpReq: read req from %s err %w", p.Address, err)
return fmt.Errorf("read req: %w", err)
}
s.logger.Tracef("relayHttpReq: from %s got req: %s", p.Address, httpReq.Url)
urls := strings.Split(httpReq.Url, "/")
addr, ok := s.getDomainAddr(urls[1], urls[2])
if !ok {
httpResp.Status = http.StatusBadGateway
httpResp.Body = []byte("Bad Gateway")
return reqWriter(httpResp)
}
cli := &http.Client{}
url := addr + strings.ReplaceAll(httpReq.Url, "/"+urls[1]+"/"+urls[2], "")
req, err := http.NewRequest(string(httpReq.Method), url, bytes.NewReader(httpReq.Body))
if err != nil {
httpResp.Status = http.StatusInternalServerError
httpResp.Body = []byte(fmt.Sprintf("on req convert to http.request err: %v", err.Error()))
return reqWriter(httpResp)
}
reqHeaderMp := make(map[string]string)
respHeaderMp := make(map[string]string)
err = json.Unmarshal(httpReq.Header, &reqHeaderMp)
if err != nil {
httpResp.Status = http.StatusInternalServerError
httpResp.Body = []byte(fmt.Sprintf("on req parase header err: %v", err.Error()))
return reqWriter(httpResp)
}
for k, v := range reqHeaderMp {
req.Header.Set(k, v)
}
res, err := cli.Do(req)
if err != nil {
httpResp.Status = http.StatusInternalServerError
httpResp.Body = []byte(fmt.Sprintf("on req do real request err: %v", err.Error()))
return nil
}
defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
if err != nil {
httpResp.Status = http.StatusInternalServerError
httpResp.Body = []byte(fmt.Sprintf("on req read real resp.Body err: %v", err.Error()))
return reqWriter(httpResp)
}
for k, v := range res.Header {
respHeaderMp[k] = v[0]
}
headerByte, err := json.Marshal(respHeaderMp)
if err != nil {
httpResp.Status = http.StatusInternalServerError
httpResp.Body = []byte(fmt.Sprintf("on req parase real resp header err: %v", err.Error()))
return reqWriter(httpResp)
}
httpResp.Header = headerByte
httpResp.Body = body
httpResp.Status = int32(res.StatusCode)
return reqWriter(httpResp)
}
// SendHttp Deprecated see relayHttpReqV2
func (s *Service) SendHttp(ctx context.Context, address boson.Address, req pb.RelayHttpReq) (Response pb.RelayHttpResp, err error) {
var stream p2p.Stream
if s.route.IsNeighbor(address) {
stream, err = s.streamer.NewStream(ctx, address, nil, protocolName, protocolVersion, streamRelayHttpReq)
if err != nil {
err = fmt.Errorf("new stream err: %s", err)
}
} else {
stream, err = s.streamer.NewRelayStream(ctx, address, nil, protocolName, protocolVersion, streamRelayHttpReq, false)
if err != nil {
err = fmt.Errorf("new realay stream err: %s", err)
}
}
if err != nil {
s.logger.Errorf("SendHttp to %s %s", address, err)
return Response, err
}
defer func() {
if err != nil {
s.logger.Errorf("SendHttp to %s %s", address, err)
_ = stream.Reset()
} else {
go stream.FullClose()
}
}()
w, r := protobuf.NewWriterAndReader(stream)
if err = w.WriteMsgWithContext(ctx, &req); err != nil {
return Response, fmt.Errorf("write message: %w", err)
}
if err = r.ReadMsgWithContext(ctx, &Response); err != nil {
if errors.Is(err, io.EOF) {
err = fmt.Errorf("stream is closed")
}
return Response, fmt.Errorf("read message: %w", err)
}
return Response, nil
}
// Deprecated
func (s *Service) getDomainAddr(groupName, domainName string) (string, bool) {
for _, v := range s.groups {
if v.Name == groupName {
for _, domain := range v.AgentHttp {
if domain.Domain == domainName {
return domain.Addr, true
}
}
}
}
s.logger.Errorf("domain %v not found in group %s", domainName, groupName)
return "", false
}
func (s *Service) getDomainAddrWithScheme(scheme, groupName, domainName string) (string, bool) {
for _, v := range s.groups {
if v.Name == groupName {
var agents []model.ConfigNetDomain
switch scheme {
case "ws", "wss":
agents = v.AgentWS
case "http", "https":
agents = v.AgentHttp
}
for _, domain := range agents {
if domain.Domain == domainName {
return domain.Addr, true
}
}
}
}
s.logger.Errorf("domain %v not found in group %s", domainName, groupName)
return "", false
}
func (s *Service) onRelayHttpReqV2(ctx context.Context, p p2p.Peer, stream p2p.Stream) (err error) {
defer func() {
if err != nil {
s.logger.Tracef("onRelayHttpReqV2 from %s err %s", p.Address, err)
_ = stream.Reset()
} else {
_ = stream.Close()
s.logger.Tracef("onRelayHttpReqV2 from %s stream close", p.Address)
}
}()
buf := bufio.NewReader(stream)
req, err := http.ReadRequest(buf)
if err != nil {
return err
}
req = req.WithContext(ctx)
defer req.Body.Close()
url := strings.ReplaceAll(req.URL.String(), aurora.RelayPrefixHttp, "")
urls := strings.Split(url, "/")
var reqWS bool
if req.Header.Get("Connection") == "Upgrade" && req.Header.Get("Upgrade") == "websocket" {
req.URL.Scheme = "ws"
reqWS = true
} else {
req.URL.Scheme = "http"
}
addr, ok := s.getDomainAddrWithScheme(req.URL.Scheme, urls[1], urls[2])
if !ok {
return errors.New("domain parse err")
}
req.URL, err = req.URL.Parse(addr + strings.ReplaceAll(url, "/"+urls[1]+"/"+urls[2], ""))
if err != nil {
return err
}
s.logger.Infof("onRelayHttpReqV2 from %s request to %s", p.Address, req.URL)
req.Host = req.URL.Host
req.RequestURI = req.URL.RequestURI()
if !reqWS {
resp, err := http.DefaultTransport.RoundTrip(req)
if err != nil {
_, _ = stream.Write([]byte(err.Error()))
return err
}
// resp.Write writes whatever response we obtained for our
// request back to the stream.
return resp.Write(stream)
} else {
var remoteConn net.Conn
switch req.URL.Scheme {
case "ws":
remoteConn, err = net.Dial("tcp", req.URL.Host)
case "wss":
remoteConn, err = tls.Dial("tcp", req.URL.Host, &tls.Config{
InsecureSkipVerify: true,
})
}
if err != nil {
_, _ = stream.Write([]byte(err.Error()))
return err
}
defer remoteConn.Close()
b, _ := httputil.DumpRequest(req, false)
_, err = remoteConn.Write(b)
if err != nil {
_, _ = stream.Write([]byte(err.Error()))
return err
}
// response
respErrCh := make(chan error, 1)
go func() {
_, err = io.Copy(stream, remoteConn)
s.logger.Tracef("onRelayHttpReqV2 from %s io.copy resp err %v", p.Address, err)
respErrCh <- err
}()
// request
reqErrCh := make(chan error, 1)
go func() {
_, err = io.Copy(remoteConn, stream)
s.logger.Tracef("onRelayHttpReqV2 from %s io.copy req err %v", p.Address, err)
reqErrCh <- err
}()
select {
case err = <-respErrCh:
return err
case err = <-reqErrCh:
return err
}
}
}