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TUN-3492: Refactor OriginService, shrink its interface

This commit is contained in:
Adam Chalmers 2020-10-30 16:37:40 -05:00
parent 18c359cb86
commit d01770107e
12 changed files with 214 additions and 185 deletions
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2
cmd/cloudflared/tunnel/cmd.go
View File

@ -395,7 +395,7 @@ func StartServer(
hostname,
metricsListener.Addr().String(),
// TODO (TUN-3461): Update UI to show multiple origin URLs
tunnelConfig.IngressRules.CatchAll().Service.Address(),
tunnelConfig.IngressRules.CatchAll().Service.String(),
tunnelConfig.HAConnections,
)
logLevels, err := logger.ParseLevelString(c.String("loglevel"))

2
cmd/cloudflared/tunnel/configuration.go
View File

@ -202,7 +202,7 @@ func prepareTunnelConfig(
Version: version,
Arch: fmt.Sprintf("%s_%s", buildInfo.GoOS, buildInfo.GoArch),
}
ingressRules, err = ingress.ParseIngress(config.GetConfiguration(), logger)
ingressRules, err = ingress.ParseIngress(config.GetConfiguration())
if err != nil && err != ingress.ErrNoIngressRules {
return nil, err
}

4
cmd/cloudflared/tunnel/ingress_subcommands.go
View File

@ -71,7 +71,7 @@ func buildTestURLCommand() *cli.Command {
func validateIngressCommand(c *cli.Context) error {
conf := config.GetConfiguration()
fmt.Println("Validating rules from", conf.Source())
if _, err := ingress.ParseIngressDryRun(conf); err != nil {
if _, err := ingress.ParseIngress(conf); err != nil {
return errors.Wrap(err, "Validation failed")
}
if c.IsSet("url") {
@ -98,7 +98,7 @@ func testURLCommand(c *cli.Context) error {
conf := config.GetConfiguration()
fmt.Println("Using rules from", conf.Source())
ing, err := ingress.ParseIngressDryRun(conf)
ing, err := ingress.ParseIngress(conf)
if err != nil {
return errors.Wrap(err, "Validation failed")
}

121
ingress/ingress.go
View File

@ -1,24 +1,17 @@
package ingress
import (
"context"
"crypto/tls"
"fmt"
"net"
"net/http"
"net/url"
"regexp"
"strings"
"sync"
"time"
"github.com/pkg/errors"
"github.com/urfave/cli/v2"
"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
"github.com/cloudflare/cloudflared/logger"
"github.com/cloudflare/cloudflared/tlsconfig"
"github.com/cloudflare/cloudflared/validation"
)
var (
@ -28,82 +21,6 @@ var (
ErrURLIncompatibleWithIngress = errors.New("You can't set the --url flag (or $TUNNEL_URL) when using multiple-origin ingress rules")
)
// Finalize the rules by adding missing struct fields and validating each origin.
func (ing *Ingress) setHTTPTransport(logger logger.Service) error {
for ruleNumber, rule := range ing.Rules {
cfg := rule.Config
originCertPool, err := tlsconfig.LoadOriginCA(cfg.CAPool, nil)
if err != nil {
return errors.Wrap(err, "Error loading cert pool")
}
httpTransport := &http.Transport{
Proxy: http.ProxyFromEnvironment,
MaxIdleConns: cfg.KeepAliveConnections,
MaxIdleConnsPerHost: cfg.KeepAliveConnections,
IdleConnTimeout: cfg.KeepAliveTimeout,
TLSHandshakeTimeout: cfg.TLSTimeout,
ExpectContinueTimeout: 1 * time.Second,
TLSClientConfig: &tls.Config{RootCAs: originCertPool, InsecureSkipVerify: cfg.NoTLSVerify},
}
if _, isHelloWorld := rule.Service.(*HelloWorld); !isHelloWorld && cfg.OriginServerName != "" {
httpTransport.TLSClientConfig.ServerName = cfg.OriginServerName
}
dialer := &net.Dialer{
Timeout: cfg.ConnectTimeout,
KeepAlive: cfg.TCPKeepAlive,
}
if cfg.NoHappyEyeballs {
dialer.FallbackDelay = -1 // As of Golang 1.12, a negative delay disables "happy eyeballs"
}
// DialContext depends on which kind of origin is being used.
dialContext := dialer.DialContext
switch service := rule.Service.(type) {
// If this origin is a unix socket, enforce network type "unix".
case UnixSocketPath:
httpTransport.DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) {
return dialContext(ctx, "unix", service.Address())
}
// Otherwise, use the regular network config.
default:
httpTransport.DialContext = dialContext
}
ing.Rules[ruleNumber].HTTPTransport = httpTransport
ing.Rules[ruleNumber].ClientTLSConfig = httpTransport.TLSClientConfig
}
// Validate each origin
for _, rule := range ing.Rules {
// If tunnel running in bastion mode, a connection to origin will not exist until initiated by the client.
if rule.Config.BastionMode {
continue
}
// Unix sockets don't have validation
if _, ok := rule.Service.(UnixSocketPath); ok {
continue
}
switch service := rule.Service.(type) {
case UnixSocketPath:
continue
case *HelloWorld:
continue
default:
if err := validation.ValidateHTTPService(service.Address(), rule.Hostname, rule.HTTPTransport); err != nil {
logger.Errorf("unable to connect to the origin: %s", err)
}
}
}
return nil
}
// FindMatchingRule returns the index of the Ingress Rule which matches the given
// hostname and path. This function assumes the last rule matches everything,
// which is the case if the rules were instantiated via the ingress#Validate method
@ -154,14 +71,13 @@ func NewSingleOrigin(c *cli.Context, compatibilityMode bool, logger logger.Servi
},
defaults: originRequestFromSingeRule(c),
}
err = ing.setHTTPTransport(logger)
return ing, err
}
// Get a single origin service from the CLI/config.
func parseSingleOriginService(c *cli.Context, compatibilityMode bool) (OriginService, error) {
if c.IsSet("hello-world") {
return new(HelloWorld), nil
return new(helloWorld), nil
}
if c.IsSet("url") {
originURLStr, err := config.ValidateUrl(c, compatibilityMode)
@ -172,14 +88,14 @@ func parseSingleOriginService(c *cli.Context, compatibilityMode bool) (OriginSer
if err != nil {
return nil, errors.Wrap(err, "couldn't parse origin URL")
}
return &URL{URL: originURL, RootURL: originURL}, nil
return &localService{URL: originURL, RootURL: originURL}, nil
}
if c.IsSet("unix-socket") {
unixSocket, err := config.ValidateUnixSocket(c)
path, err := config.ValidateUnixSocket(c)
if err != nil {
return nil, errors.Wrap(err, "Error validating --unix-socket")
}
return UnixSocketPath(unixSocket), nil
return &unixSocketPath{path: path}, nil
}
return nil, errors.New("You must either set ingress rules in your config file, or use --url or use --unix-socket")
}
@ -192,7 +108,7 @@ func (ing Ingress) IsEmpty() bool {
// StartOrigins will start any origin services managed by cloudflared, e.g. proxy servers or Hello World.
func (ing Ingress) StartOrigins(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error) error {
for _, rule := range ing.Rules {
if err := rule.Service.Start(wg, log, shutdownC, errC, rule.Config); err != nil {
if err := rule.Service.start(wg, log, shutdownC, errC, rule.Config); err != nil {
return err
}
}
@ -209,11 +125,12 @@ func validate(ingress []config.UnvalidatedIngressRule, defaults OriginRequestCon
for i, r := range ingress {
var service OriginService
if strings.HasPrefix(r.Service, "unix:") {
if prefix := "unix:"; strings.HasPrefix(r.Service, prefix) {
// No validation necessary for unix socket filepath services
service = UnixSocketPath(strings.TrimPrefix(r.Service, "unix:"))
path := strings.TrimPrefix(r.Service, prefix)
service = &unixSocketPath{path: path}
} else if r.Service == "hello_world" || r.Service == "hello-world" || r.Service == "helloworld" {
service = new(HelloWorld)
service = new(helloWorld)
} else {
// Validate URL services
u, err := url.Parse(r.Service)
@ -228,7 +145,7 @@ func validate(ingress []config.UnvalidatedIngressRule, defaults OriginRequestCon
if u.Path != "" {
return Ingress{}, fmt.Errorf("%s is an invalid address, ingress rules don't support proxying to a different path on the origin service. The path will be the same as the eyeball request's path", r.Service)
}
serviceURL := URL{URL: u}
serviceURL := localService{URL: u}
service = &serviceURL
}
@ -262,7 +179,7 @@ func validate(ingress []config.UnvalidatedIngressRule, defaults OriginRequestCon
Hostname: r.Hostname,
Service: service,
Path: pathRegex,
Config: SetConfig(defaults, r.OriginRequest),
Config: setConfig(defaults, r.OriginRequest),
}
}
return Ingress{Rules: rules, defaults: defaults}, nil
@ -279,20 +196,10 @@ func (e errRuleShouldNotBeCatchAll) Error() string {
"will never be triggered.", e.i+1, e.hostname)
}
// ParseIngress parses, validates and initializes HTTP transports to each origin.
func ParseIngress(conf *config.Configuration, logger logger.Service) (Ingress, error) {
ing, err := ParseIngressDryRun(conf)
if err != nil {
return Ingress{}, err
}
err = ing.setHTTPTransport(logger)
return ing, err
}
// ParseIngressDryRun parses ingress rules, but does not send HTTP requests to the origins.
func ParseIngressDryRun(conf *config.Configuration) (Ingress, error) {
// ParseIngress parses ingress rules, but does not send HTTP requests to the origins.
func ParseIngress(conf *config.Configuration) (Ingress, error) {
if len(conf.Ingress) == 0 {
return Ingress{}, ErrNoIngressRules
}
return validate(conf.Ingress, OriginRequestFromYAML(conf.OriginRequest))
return validate(conf.Ingress, originRequestFromYAML(conf.OriginRequest))
}

45
ingress/ingress_test.go
View File

@ -4,7 +4,6 @@ import (
"net/url"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"gopkg.in/yaml.v2"
@ -16,16 +15,16 @@ func TestParseUnixSocket(t *testing.T) {
ingress:
- service: unix:/tmp/echo.sock
`
ing, err := ParseIngressDryRun(MustReadIngress(rawYAML))
ing, err := ParseIngress(MustReadIngress(rawYAML))
require.NoError(t, err)
_, ok := ing.Rules[0].Service.(UnixSocketPath)
_, ok := ing.Rules[0].Service.(*unixSocketPath)
require.True(t, ok)
}
func Test_parseIngress(t *testing.T) {
localhost8000 := MustParseURL(t, "https://localhost:8000")
localhost8001 := MustParseURL(t, "https://localhost:8001")
defaultConfig := SetConfig(OriginRequestFromYAML(config.OriginRequestConfig{}), config.OriginRequestConfig{})
defaultConfig := setConfig(originRequestFromYAML(config.OriginRequestConfig{}), config.OriginRequestConfig{})
require.Equal(t, defaultKeepAliveConnections, defaultConfig.KeepAliveConnections)
type args struct {
rawYAML string
@ -53,12 +52,12 @@ ingress:
want: []Rule{
{
Hostname: "tunnel1.example.com",
Service: &URL{URL: localhost8000},
Service: &localService{URL: localhost8000},
Config: defaultConfig,
},
{
Hostname: "*",
Service: &URL{URL: localhost8001},
Service: &localService{URL: localhost8001},
Config: defaultConfig,
},
},
@ -74,7 +73,7 @@ extraKey: extraValue
want: []Rule{
{
Hostname: "*",
Service: &URL{URL: localhost8000},
Service: &localService{URL: localhost8000},
Config: defaultConfig,
},
},
@ -87,7 +86,7 @@ ingress:
`},
want: []Rule{
{
Service: &URL{URL: localhost8000},
Service: &localService{URL: localhost8000},
Config: defaultConfig,
},
},
@ -165,15 +164,37 @@ ingress:
`},
wantErr: true,
},
{
name: "Invalid HTTP status",
args: args{rawYAML: `
ingress:
- service: http_status:asdf
`},
wantErr: true,
},
{
name: "Valid hello world service",
args: args{rawYAML: `
ingress:
- service: hello_world
`},
want: []Rule{
{
Hostname: "",
Service: new(helloWorld),
Config: defaultConfig,
},
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := ParseIngressDryRun(MustReadIngress(tt.args.rawYAML))
got, err := ParseIngress(MustReadIngress(tt.args.rawYAML))
if (err != nil) != tt.wantErr {
t.Errorf("ParseIngressDryRun() error = %v, wantErr %v", err, tt.wantErr)
t.Errorf("ParseIngress() error = %v, wantErr %v", err, tt.wantErr)
return
}
assert.Equal(t, tt.want, got.Rules)
require.Equal(t, tt.want, got.Rules)
})
}
}
@ -195,7 +216,7 @@ ingress:
service: https://localhost:8002
`
ing, err := ParseIngressDryRun(MustReadIngress(rulesYAML))
ing, err := ParseIngress(MustReadIngress(rulesYAML))
if err != nil {
b.Error(err)
}

4
ingress/origin_request_config.go
View File

@ -116,7 +116,7 @@ func originRequestFromSingeRule(c *cli.Context) OriginRequestConfig {
}
}
func OriginRequestFromYAML(y config.OriginRequestConfig) OriginRequestConfig {
func originRequestFromYAML(y config.OriginRequestConfig) OriginRequestConfig {
out := OriginRequestConfig{
ConnectTimeout: defaultConnectTimeout,
TLSTimeout: defaultTLSTimeout,
@ -310,7 +310,7 @@ func (defaults *OriginRequestConfig) setProxyType(overrides config.OriginRequest
// 3. Defaults chosen by the cloudflared team
// 4. Golang zero values for that type
// If an earlier option isn't set, it will try the next option down.
func SetConfig(defaults OriginRequestConfig, overrides config.OriginRequestConfig) OriginRequestConfig {
func setConfig(defaults OriginRequestConfig, overrides config.OriginRequestConfig) OriginRequestConfig {
cfg := defaults
cfg.setConnectTimeout(overrides)
cfg.setTLSTimeout(overrides)

4
ingress/origin_request_config_test.go
View File

@ -71,7 +71,7 @@ ingress:
proxyPort: 200
proxyType: ""
`
ing, err := ParseIngressDryRun(MustReadIngress(rulesYAML))
ing, err := ParseIngress(MustReadIngress(rulesYAML))
if err != nil {
t.Error(err)
}
@ -144,7 +144,7 @@ ingress:
proxyPort: 200
proxyType: ""
`
ing, err := ParseIngressDryRun(MustReadIngress(rulesYAML))
ing, err := ParseIngress(MustReadIngress(rulesYAML))
if err != nil {
t.Error(err)
}

172
ingress/origin_service.go
View File

@ -1,72 +1,103 @@
package ingress
import (
"context"
"crypto/tls"
"fmt"
"net"
"net/http"
"net/url"
"strconv"
"sync"
"time"
"github.com/cloudflare/cloudflared/hello"
"github.com/cloudflare/cloudflared/logger"
"github.com/cloudflare/cloudflared/socks"
"github.com/cloudflare/cloudflared/tlsconfig"
"github.com/cloudflare/cloudflared/websocket"
gws "github.com/gorilla/websocket"
"github.com/pkg/errors"
)
// OriginService is something a tunnel can proxy traffic to.
type OriginService interface {
Address() string
// RoundTrip is how cloudflared proxies eyeball requests to the actual origin services
http.RoundTripper
String() string
// Start the origin service if it's managed by cloudflared, e.g. proxy servers or Hello World.
// If it's not managed by cloudflared, this is a no-op because the user is responsible for
// starting the origin service.
Start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error
String() string
// RewriteOriginURL modifies the HTTP request from cloudflared to the origin, so that it apply
// this particular type of origin service's specific routing logic.
RewriteOriginURL(*url.URL)
start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error
}
// UnixSocketPath is an OriginService representing a unix socket (which accepts HTTP)
type UnixSocketPath string
func (o UnixSocketPath) Address() string {
return string(o)
// unixSocketPath is an OriginService representing a unix socket (which accepts HTTP)
type unixSocketPath struct {
path string
transport *http.Transport
}
func (o UnixSocketPath) String() string {
return "unix socket: " + string(o)
func (o *unixSocketPath) String() string {
return "unix socket: " + o.path
}
func (o UnixSocketPath) Start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error {
func (o *unixSocketPath) start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error {
transport, err := newHTTPTransport(o, cfg)
if err != nil {
return err
}
o.transport = transport
return nil
}
func (o UnixSocketPath) RewriteOriginURL(u *url.URL) {
// No changes necessary because the origin request URL isn't used.
// Instead, HTTPTransport's dial is already configured to address the unix socket.
func (o *unixSocketPath) RoundTrip(req *http.Request) (*http.Response, error) {
return o.transport.RoundTrip(req)
}
// URL is an OriginService listening on a TCP address
type URL struct {
func (o *unixSocketPath) Dial(url string, headers http.Header) (*gws.Conn, *http.Response, error) {
d := &gws.Dialer{TLSClientConfig: o.transport.TLSClientConfig}
return d.Dial(url, headers)
}
// localService is an OriginService listening on a TCP/IP address the user's origin can route to.
type localService struct {
// The URL for the user's origin service
RootURL *url.URL
// The URL that cloudflared should send requests to.
// If this origin requires starting a proxy, this is the proxy's address,
// and that proxy points to RootURL. Otherwise, this is equal to RootURL.
URL *url.URL
transport *http.Transport
}
func (o *URL) Address() string {
func (o *localService) Dial(url string, headers http.Header) (*gws.Conn, *http.Response, error) {
d := &gws.Dialer{TLSClientConfig: o.transport.TLSClientConfig}
return d.Dial(url, headers)
}
func (o *localService) address() string {
return o.URL.String()
}
func (o *URL) Start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error {
staticHost := o.staticHost()
if !originRequiresProxy(staticHost, cfg) {
return nil
func (o *localService) start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error {
transport, err := newHTTPTransport(o, cfg)
if err != nil {
return err
}
o.transport = transport
// Start a proxy if one is needed
staticHost := o.staticHost()
if originRequiresProxy(staticHost, cfg) {
if err := o.startProxy(staticHost, wg, log, shutdownC, errC, cfg); err != nil {
return err
}
}
return nil
}
func (o *localService) startProxy(staticHost string, wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error {
// Start a listener for the proxy
proxyAddress := net.JoinHostPort(cfg.ProxyAddress, strconv.Itoa(int(cfg.ProxyPort)))
@ -111,16 +142,18 @@ func (o *URL) Start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan str
return nil
}
func (o *URL) String() string {
return o.Address()
func (o *localService) String() string {
return o.address()
}
func (o *URL) RewriteOriginURL(u *url.URL) {
u.Host = o.URL.Host
u.Scheme = o.URL.Scheme
func (o *localService) RoundTrip(req *http.Request) (*http.Response, error) {
// Rewrite the request URL so that it goes to the origin service.
req.URL.Host = o.URL.Host
req.URL.Scheme = o.URL.Scheme
return o.transport.RoundTrip(req)
}
func (o *URL) staticHost() string {
func (o *localService) staticHost() string {
addPortIfMissing := func(uri *url.URL, port int) string {
if uri.Port() != "" {
@ -143,21 +176,24 @@ func (o *URL) staticHost() string {
}
// HelloWorld is the built-in Hello World service. Used for testing and experimenting with cloudflared.
type HelloWorld struct {
// HelloWorld is an OriginService for the built-in Hello World server.
// Users only use this for testing and experimenting with cloudflared.
type helloWorld struct {
server net.Listener
transport *http.Transport
}
func (o *HelloWorld) Address() string {
return o.server.Addr().String()
}
func (o *HelloWorld) String() string {
return "Hello World static HTML service"
func (o *helloWorld) String() string {
return "Hello World test origin"
}
// Start starts a HelloWorld server and stores its address in the Service receiver.
func (o *HelloWorld) Start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error {
func (o *helloWorld) start(wg *sync.WaitGroup, log logger.Service, shutdownC <-chan struct{}, errC chan error, cfg OriginRequestConfig) error {
transport, err := newHTTPTransport(o, cfg)
if err != nil {
return err
}
o.transport = transport
helloListener, err := hello.CreateTLSListener("127.0.0.1:")
if err != nil {
return errors.Wrap(err, "Cannot start Hello World Server")
@ -171,11 +207,63 @@ func (o *HelloWorld) Start(wg *sync.WaitGroup, log logger.Service, shutdownC <-c
return nil
}
func (o *HelloWorld) RewriteOriginURL(u *url.URL) {
u.Host = o.Address()
u.Scheme = "https"
func (o *helloWorld) RoundTrip(req *http.Request) (*http.Response, error) {
// Rewrite the request URL so that it goes to the Hello World server.
req.URL.Host = o.server.Addr().String()
req.URL.Scheme = "https"
return o.transport.RoundTrip(req)
}
func (o *helloWorld) Dial(url string, headers http.Header) (*gws.Conn, *http.Response, error) {
d := &gws.Dialer{TLSClientConfig: o.transport.TLSClientConfig}
return d.Dial(url, headers)
}
func originRequiresProxy(staticHost string, cfg OriginRequestConfig) bool {
return staticHost != "" || cfg.BastionMode
}
func newHTTPTransport(service OriginService, cfg OriginRequestConfig) (*http.Transport, error) {
originCertPool, err := tlsconfig.LoadOriginCA(cfg.CAPool, nil)
if err != nil {
return nil, errors.Wrap(err, "Error loading cert pool")
}
httpTransport := http.Transport{
Proxy: http.ProxyFromEnvironment,
MaxIdleConns: cfg.KeepAliveConnections,
MaxIdleConnsPerHost: cfg.KeepAliveConnections,
IdleConnTimeout: cfg.KeepAliveTimeout,
TLSHandshakeTimeout: cfg.TLSTimeout,
ExpectContinueTimeout: 1 * time.Second,
TLSClientConfig: &tls.Config{RootCAs: originCertPool, InsecureSkipVerify: cfg.NoTLSVerify},
}
if _, isHelloWorld := service.(*helloWorld); !isHelloWorld && cfg.OriginServerName != "" {
httpTransport.TLSClientConfig.ServerName = cfg.OriginServerName
}
dialer := &net.Dialer{
Timeout: cfg.ConnectTimeout,
KeepAlive: cfg.TCPKeepAlive,
}
if cfg.NoHappyEyeballs {
dialer.FallbackDelay = -1 // As of Golang 1.12, a negative delay disables "happy eyeballs"
}
// DialContext depends on which kind of origin is being used.
dialContext := dialer.DialContext
switch service := service.(type) {
// If this origin is a unix socket, enforce network type "unix".
case *unixSocketPath:
httpTransport.DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) {
return dialContext(ctx, "unix", service.path)
}
// Otherwise, use the regular network config.
default:
httpTransport.DialContext = dialContext
}
return &httpTransport, nil
}

7
ingress/rule.go
View File

@ -1,8 +1,6 @@
package ingress
import (
"crypto/tls"
"net/http"
"regexp"
"strings"
)
@ -23,11 +21,6 @@ type Rule struct {
// Configure the request cloudflared sends to this specific origin.
Config OriginRequestConfig
// Configures TLS for the cloudflared -> origin request
ClientTLSConfig *tls.Config
// Configures HTTP for the cloudflared -> origin request
HTTPTransport http.RoundTripper
}
// MultiLineString is for outputting rules in a human-friendly way when Cloudflared

9
origin/tunnel.go
View File

@ -698,7 +698,6 @@ func (h *TunnelHandler) createRequest(stream *h2mux.MuxedStream) (*http.Request,
}
h.AppendTagHeaders(req)
rule, _ := h.ingressRules.FindMatchingRule(req.Host, req.URL.Path)
rule.Service.RewriteOriginURL(req.URL)
return req, rule, nil
}
@ -708,7 +707,11 @@ func (h *TunnelHandler) serveWebsocket(stream *h2mux.MuxedStream, req *http.Requ
req.Host = hostHeader
}
conn, response, err := websocket.ClientConnect(req, rule.ClientTLSConfig)
dialler, ok := rule.Service.(websocket.Dialler)
if !ok {
return nil, fmt.Errorf("Websockets aren't supported by the origin service '%s'", rule.Service)
}
conn, response, err := websocket.ClientConnect(req, dialler)
if err != nil {
return nil, err
}
@ -742,7 +745,7 @@ func (h *TunnelHandler) serveHTTP(stream *h2mux.MuxedStream, req *http.Request,
req.Host = hostHeader
}
response, err := rule.HTTPTransport.RoundTrip(req)
response, err := rule.Service.RoundTrip(req)
if err != nil {
return nil, errors.Wrap(err, "Error proxying request to origin")
}

22
websocket/websocket.go
View File

@ -69,15 +69,31 @@ func IsWebSocketUpgrade(req *http.Request) bool {
return websocket.IsWebSocketUpgrade(req)
}
// Dialler is something that can proxy websocket requests.
type Dialler interface {
Dial(url string, headers http.Header) (*websocket.Conn, *http.Response, error)
}
type defaultDialler struct {
tlsConfig *tls.Config
}
func (dd *defaultDialler) Dial(url string, header http.Header) (*websocket.Conn, *http.Response, error) {
d := &websocket.Dialer{TLSClientConfig: dd.tlsConfig}
return d.Dial(url, header)
}
// ClientConnect creates a WebSocket client connection for provided request. Caller is responsible for closing
// the connection. The response body may not contain the entire response and does
// not need to be closed by the application.
func ClientConnect(req *http.Request, tlsClientConfig *tls.Config) (*websocket.Conn, *http.Response, error) {
func ClientConnect(req *http.Request, dialler Dialler) (*websocket.Conn, *http.Response, error) {
req.URL.Scheme = changeRequestScheme(req)
wsHeaders := websocketHeaders(req)
d := &websocket.Dialer{TLSClientConfig: tlsClientConfig}
conn, response, err := d.Dial(req.URL.String(), wsHeaders)
if dialler == nil {
dialler = new(defaultDialler)
}
conn, response, err := dialler.Dial(req.URL.String(), wsHeaders)
if err != nil {
return nil, response, err
}

3
websocket/websocket_test.go
View File

@ -77,7 +77,8 @@ func TestServe(t *testing.T) {
tlsConfig := websocketClientTLSConfig(t)
assert.NotNil(t, tlsConfig)
conn, resp, err := ClientConnect(req, tlsConfig)
d := defaultDialler{tlsConfig: tlsConfig}
conn, resp, err := ClientConnect(req, &d)
assert.NoError(t, err)
assert.Equal(t, testSecWebsocketAccept, resp.Header.Get("Sec-WebSocket-Accept"))