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http_server.go
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http_server.go
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// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package ghttp
import (
"context"
"crypto/tls"
"crypto/x509"
"net/http"
"net/url"
"github.com/hashicorp/go-plugin"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/ghttp/ghttpproto"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/ghttp/greadcloser"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/ghttp/greadcloser/greadcloserproto"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/ghttp/gresponsewriter"
"github.com/ava-labs/avalanchego/vms/rpcchainvm/ghttp/gresponsewriter/gresponsewriterproto"
)
// Server is a http.Handler that is managed over RPC.
type Server struct {
handler http.Handler
broker *plugin.GRPCBroker
}
// NewServer returns a http.Handler instance manage remotely
func NewServer(handler http.Handler, broker *plugin.GRPCBroker) *Server {
return &Server{
handler: handler,
broker: broker,
}
}
// Handle ...
func (s *Server) Handle(ctx context.Context, req *ghttpproto.HTTPRequest) (*ghttpproto.HTTPResponse, error) {
writerConn, err := s.broker.Dial(req.ResponseWriter.Id)
if err != nil {
return nil, err
}
defer writerConn.Close()
readerConn, err := s.broker.Dial(req.Request.Body)
if err != nil {
return nil, err
}
defer readerConn.Close()
writerHeaders := make(http.Header)
for _, elem := range req.ResponseWriter.Header {
writerHeaders[elem.Key] = elem.Values
}
writer := gresponsewriter.NewClient(writerHeaders, gresponsewriterproto.NewWriterClient(writerConn), s.broker)
reader := greadcloser.NewClient(greadcloserproto.NewReaderClient(readerConn))
// create the request with the current context
request, err := http.NewRequestWithContext(
ctx,
req.Request.Method,
req.Request.RequestURI,
reader,
)
if err != nil {
return nil, err
}
if req.Request.Url != nil {
request.URL = &url.URL{
Scheme: req.Request.Url.Scheme,
Opaque: req.Request.Url.Opaque,
Host: req.Request.Url.Host,
Path: req.Request.Url.Path,
RawPath: req.Request.Url.RawPath,
ForceQuery: req.Request.Url.ForceQuery,
RawQuery: req.Request.Url.RawQuery,
Fragment: req.Request.Url.Fragment,
}
if req.Request.Url.User != nil {
if req.Request.Url.User.PasswordSet {
request.URL.User = url.UserPassword(req.Request.Url.User.Username, req.Request.Url.User.Password)
} else {
request.URL.User = url.User(req.Request.Url.User.Username)
}
}
}
request.Proto = req.Request.Proto
request.ProtoMajor = int(req.Request.ProtoMajor)
request.ProtoMinor = int(req.Request.ProtoMinor)
request.Header = make(http.Header, len(req.Request.Header))
for _, elem := range req.Request.Header {
request.Header[elem.Key] = elem.Values
}
request.ContentLength = req.Request.ContentLength
request.TransferEncoding = req.Request.TransferEncoding
request.Host = req.Request.Host
request.Form = make(url.Values, len(req.Request.Form))
for _, elem := range req.Request.Form {
request.Form[elem.Key] = elem.Values
}
request.PostForm = make(url.Values, len(req.Request.PostForm))
for _, elem := range req.Request.PostForm {
request.PostForm[elem.Key] = elem.Values
}
request.Trailer = make(http.Header)
request.RemoteAddr = req.Request.RemoteAddr
request.RequestURI = req.Request.RequestURI
if req.Request.Tls != nil {
request.TLS = &tls.ConnectionState{
Version: uint16(req.Request.Tls.Version),
HandshakeComplete: req.Request.Tls.HandshakeComplete,
DidResume: req.Request.Tls.DidResume,
CipherSuite: uint16(req.Request.Tls.CipherSuite),
NegotiatedProtocol: req.Request.Tls.NegotiatedProtocol,
NegotiatedProtocolIsMutual: req.Request.Tls.NegotiatedProtocolIsMutual,
ServerName: req.Request.Tls.ServerName,
PeerCertificates: make([]*x509.Certificate, len(req.Request.Tls.PeerCertificates.Cert)),
VerifiedChains: make([][]*x509.Certificate, len(req.Request.Tls.VerifiedChains)),
SignedCertificateTimestamps: req.Request.Tls.SignedCertificateTimestamps,
OCSPResponse: req.Request.Tls.OcspResponse,
TLSUnique: req.Request.Tls.TlsUnique,
}
for i, certBytes := range req.Request.Tls.PeerCertificates.Cert {
cert, err := x509.ParseCertificate(certBytes)
if err != nil {
return nil, err
}
request.TLS.PeerCertificates[i] = cert
}
for i, chain := range req.Request.Tls.VerifiedChains {
request.TLS.VerifiedChains[i] = make([]*x509.Certificate, len(chain.Cert))
for j, certBytes := range chain.Cert {
cert, err := x509.ParseCertificate(certBytes)
if err != nil {
return nil, err
}
request.TLS.VerifiedChains[i][j] = cert
}
}
}
s.handler.ServeHTTP(writer, request)
// return the response
return &ghttpproto.HTTPResponse{}, nil
}