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Fix #111: Add support for specifying a specific HTTP Host: header on the origin. (#114)

This commit is contained in:
David Barr 2019-08-30 13:55:54 +10:00 committed by Silver
parent df25ed9bde
commit dc48cdce1a
3 changed files with 26 additions and 6 deletions
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6
cmd/cloudflared/tunnel/cmd.go
View File

@ -662,6 +662,12 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
EnvVars: []string{"TUNNEL_HOSTNAME"}, EnvVars: []string{"TUNNEL_HOSTNAME"},
Hidden: shouldHide, Hidden: shouldHide,
}), }),
altsrc.NewStringFlag(&cli.StringFlag{
Name: "http-host-header",
Usage: "Sets the HTTP Host header for the local webserver.",
EnvVars: []string{"TUNNEL_HTTP_HOST_HEADER"},
Hidden: shouldHide,
}),
altsrc.NewStringFlag(&cli.StringFlag{ altsrc.NewStringFlag(&cli.StringFlag{
Name: "origin-server-name", Name: "origin-server-name",
Usage: "Hostname on the origin server certificate.", Usage: "Hostname on the origin server certificate.",

1
cmd/cloudflared/tunnel/configuration.go
View File

@ -253,6 +253,7 @@ func prepareTunnelConfig(
HTTPTransport: httpTransport, HTTPTransport: httpTransport,
HeartbeatInterval: c.Duration("heartbeat-interval"), HeartbeatInterval: c.Duration("heartbeat-interval"),
Hostname: hostname, Hostname: hostname,
HTTPHostHeader: c.String("http-host-header"),
IncidentLookup: origin.NewIncidentLookup(), IncidentLookup: origin.NewIncidentLookup(),
IsAutoupdated: c.Bool("is-autoupdated"), IsAutoupdated: c.Bool("is-autoupdated"),
IsFreeTunnel: isFreeTunnel, IsFreeTunnel: isFreeTunnel,

13
origin/tunnel.go
View File

@ -53,6 +53,7 @@ type TunnelConfig struct {
HTTPTransport http.RoundTripper HTTPTransport http.RoundTripper
HeartbeatInterval time.Duration HeartbeatInterval time.Duration
Hostname string Hostname string
HTTPHostHeader string
IncidentLookup IncidentLookup IncidentLookup IncidentLookup
IsAutoupdated bool IsAutoupdated bool
IsFreeTunnel bool IsFreeTunnel bool
@ -448,6 +449,7 @@ func H1ResponseToH2Response(h1 *http.Response) (h2 []h2mux.Header) {
type TunnelHandler struct { type TunnelHandler struct {
originUrl string originUrl string
httpHostHeader string
muxer *h2mux.Muxer muxer *h2mux.Muxer
httpClient http.RoundTripper httpClient http.RoundTripper
tlsConfig *tls.Config tlsConfig *tls.Config
@ -473,6 +475,7 @@ func NewTunnelHandler(ctx context.Context,
} }
h := &TunnelHandler{ h := &TunnelHandler{
originUrl: originURL, originUrl: originURL,
httpHostHeader: config.HTTPHostHeader,
httpClient: config.HTTPTransport, httpClient: config.HTTPTransport,
tlsConfig: config.ClientTlsConfig, tlsConfig: config.ClientTlsConfig,
tags: config.Tags, tags: config.Tags,
@ -566,6 +569,11 @@ func (h *TunnelHandler) createRequest(stream *h2mux.MuxedStream) (*http.Request,
} }
func (h *TunnelHandler) serveWebsocket(stream *h2mux.MuxedStream, req *http.Request) (*http.Response, error) { func (h *TunnelHandler) serveWebsocket(stream *h2mux.MuxedStream, req *http.Request) (*http.Response, error) {
if h.httpHostHeader != "" {
req.Header.Set("Host", h.httpHostHeader)
req.Host = h.httpHostHeader
}
conn, response, err := websocket.ClientConnect(req, h.tlsConfig) conn, response, err := websocket.ClientConnect(req, h.tlsConfig)
if err != nil { if err != nil {
return nil, err return nil, err
@ -594,6 +602,11 @@ func (h *TunnelHandler) serveHTTP(stream *h2mux.MuxedStream, req *http.Request)
// Request origin to keep connection alive to improve performance // Request origin to keep connection alive to improve performance
req.Header.Set("Connection", "keep-alive") req.Header.Set("Connection", "keep-alive")
if h.httpHostHeader != "" {
req.Header.Set("Host", h.httpHostHeader)
req.Host = h.httpHostHeader
}
response, err := h.httpClient.RoundTrip(req) response, err := h.httpClient.RoundTrip(req)
if err != nil { if err != nil {
return nil, errors.Wrap(err, "Error proxying request to origin") return nil, errors.Wrap(err, "Error proxying request to origin")