forked from getlantern/http-proxy-archived
/
http_proxy_test.go
633 lines (520 loc) · 16.6 KB
/
http_proxy_test.go
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package main
import (
"crypto/tls"
"flag"
"fmt"
"net"
"net/http"
"net/http/httptest"
"net/url"
"os"
"strconv"
"testing"
"time"
"github.com/getlantern/keyman"
"github.com/getlantern/measured"
"github.com/getlantern/testify/assert"
"github.com/getlantern/http-proxy/commonfilter"
"github.com/getlantern/http-proxy/forward"
"github.com/getlantern/http-proxy/httpconnect"
"github.com/getlantern/http-proxy/listeners"
"github.com/getlantern/http-proxy/server"
)
const (
tunneledReq = "GET / HTTP/1.1\r\n\r\n"
originResponse = "Fight for a Free Internet!"
)
var (
httpProxy *server.Server
tlsProxy *server.Server
httpOriginServer *originHandler
httpOriginURL string
tlsOriginServer *originHandler
tlsOriginURL string
serverCertificate *keyman.Certificate
// TODO: this should be imported from tlsdefaults package, but is not being
// exported there.
preferredCipherSuites = []uint16{
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
tls.TLS_RSA_WITH_RC4_128_SHA,
tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
tls.TLS_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
}
)
func init() {
testingLocal = true
}
func TestMain(m *testing.M) {
flag.Parse()
var err error
// Set up mock origin servers
httpOriginURL, httpOriginServer = newOriginHandler(originResponse, false)
defer httpOriginServer.Close()
tlsOriginURL, tlsOriginServer = newOriginHandler(originResponse, true)
defer tlsOriginServer.Close()
// Set up HTTP chained server
httpProxy, err = setupNewHTTPServer(0, 30*time.Second)
if err != nil {
log.Error("Error starting proxy server")
os.Exit(1)
}
log.Debugf("Started HTTP proxy server at %s", httpProxy.Addr.String())
// Set up HTTPS chained server
tlsProxy, err = setupNewHTTPSServer(0, 30*time.Second)
if err != nil {
log.Error("Error starting proxy server")
os.Exit(1)
}
log.Debugf("Started HTTPS proxy server at %s", tlsProxy.Addr.String())
os.Exit(m.Run())
}
func TestMaxConnections(t *testing.T) {
connectReq := "CONNECT %s HTTP/1.1\r\nHost: %s\r\n\r\n"
limitedServer, err := setupNewHTTPServer(5, 30*time.Second)
if err != nil {
assert.Fail(t, "Error starting proxy server")
}
//limitedServer.httpServer.SetKeepAlivesEnabled(false)
okFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
req := fmt.Sprintf(connectReq, originURL.Host, originURL.Host)
conn.Write([]byte(req))
var buf [400]byte
_, err = conn.Read(buf[:])
assert.NoError(t, err)
time.Sleep(time.Millisecond * 100)
}
waitFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
conn.SetReadDeadline(time.Now().Add(50 * time.Millisecond))
req := fmt.Sprintf(connectReq, originURL.Host, originURL.Host)
conn.Write([]byte(req))
var buf [400]byte
_, err = conn.Read(buf[:])
if assert.Error(t, err) {
e, ok := err.(*net.OpError)
assert.True(t, ok && e.Timeout(), "should be a time out error")
}
}
for i := 0; i < 5; i++ {
go testRoundTrip(t, limitedServer, httpOriginServer, okFn)
}
time.Sleep(time.Millisecond * 10)
for i := 0; i < 5; i++ {
go testRoundTrip(t, limitedServer, httpOriginServer, waitFn)
}
time.Sleep(time.Millisecond * 100)
for i := 0; i < 5; i++ {
go testRoundTrip(t, limitedServer, httpOriginServer, okFn)
}
}
func TestIdleClientConnections(t *testing.T) {
limitedServer, err := setupNewHTTPServer(0, 100*time.Millisecond)
if err != nil {
assert.Fail(t, "Error starting proxy server")
}
okFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
time.Sleep(time.Millisecond * 90)
conn.Write([]byte("GET / HTTP/1.1\r\nHost: www.google.com\r\n\r\n"))
var buf [400]byte
_, err := conn.Read(buf[:])
assert.NoError(t, err)
}
idleFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
time.Sleep(time.Millisecond * 110)
conn.Write([]byte("GET / HTTP/1.1\r\nHost: www.google.com\r\n\r\n"))
var buf [400]byte
_, err := conn.Read(buf[:])
assert.Error(t, err)
}
go testRoundTrip(t, limitedServer, httpOriginServer, okFn)
testRoundTrip(t, limitedServer, httpOriginServer, idleFn)
}
// A proxy with a custom origin server connection timeout
func impatientProxy(maxConns uint64, idleTimeout time.Duration) (*server.Server, error) {
forwarder, err := forward.New(nil, forward.IdleTimeoutSetter(idleTimeout))
if err != nil {
log.Error(err)
}
// Middleware: Handle HTTP CONNECT
httpConnect, err := httpconnect.New(forwarder, httpconnect.IdleTimeoutSetter(idleTimeout))
if err != nil {
log.Error(err)
}
srv := server.NewServer(httpConnect)
// Add net.Listener wrappers for inbound connections
srv.AddListenerWrappers(
// Close connections after 30 seconds of no activity
func(ls net.Listener) net.Listener {
return listeners.NewIdleConnListener(ls, time.Second*30)
},
)
ready := make(chan string)
wait := func(addr string) {
ready <- addr
}
go func(err *error) {
if *err = srv.ServeHTTP("localhost:0", wait); err != nil {
log.Errorf("Unable to serve: %s", err)
}
}(&err)
<-ready
return srv, err
}
func chunkedReq(t *testing.T, buf *[400]byte, conn net.Conn, originURL *url.URL) error {
str1tpl := "POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\nHost: %s\r\n\r\n"
str2 := "64\r\neqxnmrkoccpsnhcsrcqbuuvhvbhbcsdijcvxuglykcqxjspawibqcyzzzjacbfkmkijequeazvzinqjmamcdleeknfoqmbdwjmcb\r\n0\r\n\r\n"
str1 := fmt.Sprintf(str1tpl, originURL.Host)
t.Log("\n" + str1)
conn.Write([]byte(str1))
time.Sleep(150 * time.Millisecond)
t.Log("\n" + str2)
conn.Write([]byte([]byte(str2)))
_, err := conn.Read(buf[:])
t.Log("\n" + string(buf[:]))
return err
}
func TestIdleOriginDirect(t *testing.T) {
okServer, err := impatientProxy(0, 30*time.Second)
if err != nil {
assert.Fail(t, "Error starting proxy server: %s", err)
}
impatientServer, err := impatientProxy(0, 50*time.Millisecond)
if err != nil {
assert.Fail(t, "Error starting proxy server: %s", err)
}
okForwardFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
var buf [400]byte
chunkedReq(t, &buf, conn, originURL)
assert.Contains(t, string(buf[:]), "200 OK", "should succeed")
}
failForwardFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
var buf [400]byte
chunkedReq(t, &buf, conn, originURL)
assert.Contains(t, string(buf[:]), "502 Bad Gateway", "should fail with 502")
}
testRoundTrip(t, okServer, httpOriginServer, okForwardFn)
testRoundTrip(t, impatientServer, httpOriginServer, failForwardFn)
}
func TestIdleOriginConnect(t *testing.T) {
okServer, err := impatientProxy(0, 30*time.Second)
if err != nil {
assert.Fail(t, "Error starting proxy server: %s", err)
}
impatientServer, err := impatientProxy(0, 50*time.Millisecond)
if err != nil {
assert.Fail(t, "Error starting proxy server: %s", err)
}
connectReq := func(conn net.Conn, proxy *server.Server, originURL *url.URL) error {
reqStr := "CONNECT %s HTTP/1.1\r\nHost: %s\r\n\r\n"
req := fmt.Sprintf(reqStr, originURL.Host, originURL.Host)
conn.Write([]byte(req))
var buf [400]byte
conn.Read(buf[:])
return chunkedReq(t, &buf, conn, originURL)
}
okConnectFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
err := connectReq(conn, proxy, originURL)
assert.NoError(t, err, "should succeed")
}
failConnectFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
err := connectReq(conn, proxy, originURL)
assert.Error(t, err, "should fail")
}
testRoundTrip(t, okServer, httpOriginServer, okConnectFn)
testRoundTrip(t, impatientServer, httpOriginServer, failConnectFn)
}
// X-Lantern-Auth-Token + X-Lantern-Device-Id -> 200 OK <- Tunneled request -> 200 OK
func TestConnectOK(t *testing.T) {
connectReq := "CONNECT %s HTTP/1.1\r\nHost: %s\r\n\r\n"
connectResp := "HTTP/1.1 200 OK\r\n"
testHTTP := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
req := fmt.Sprintf(connectReq, originURL.Host, originURL.Host)
t.Log("\n" + req)
_, err := conn.Write([]byte(req))
if !assert.NoError(t, err, "should write CONNECT request") {
t.FailNow()
}
var buf [400]byte
_, err = conn.Read(buf[:])
if !assert.Contains(t, string(buf[:]), connectResp,
"should get 200 OK") {
t.FailNow()
}
_, err = conn.Write([]byte(tunneledReq))
if !assert.NoError(t, err, "should write tunneled data") {
t.FailNow()
}
buf = [400]byte{}
_, err = conn.Read(buf[:])
assert.Contains(t, string(buf[:]), originResponse, "should read tunneled response")
}
testTLS := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
req := fmt.Sprintf(connectReq, originURL.Host, originURL.Host)
t.Log("\n" + req)
_, err := conn.Write([]byte(req))
if !assert.NoError(t, err, "should write CONNECT request") {
t.FailNow()
}
var buf [400]byte
_, err = conn.Read(buf[:])
if !assert.Contains(t, string(buf[:]), connectResp,
"should get 200 OK") {
t.FailNow()
}
// HTTPS-Tunneled HTTPS
tunnConn := tls.Client(conn, &tls.Config{
InsecureSkipVerify: true,
})
tunnConn.Handshake()
_, err = tunnConn.Write([]byte(tunneledReq))
if !assert.NoError(t, err, "should write tunneled data") {
t.FailNow()
}
buf = [400]byte{}
_, err = tunnConn.Read(buf[:])
assert.Contains(t, string(buf[:]), originResponse, "should read tunneled response")
}
testRoundTrip(t, httpProxy, httpOriginServer, testHTTP)
testRoundTrip(t, tlsProxy, httpOriginServer, testHTTP)
testRoundTrip(t, httpProxy, tlsOriginServer, testTLS)
testRoundTrip(t, tlsProxy, tlsOriginServer, testTLS)
}
// X-Lantern-Auth-Token + X-Lantern-Device-Id -> Forward
func TestDirectOK(t *testing.T) {
reqTempl := "GET /%s HTTP/1.1\r\nHost: %s\r\n\r\n"
failResp := "HTTP/1.1 500 Internal Server Error\r\n"
testOk := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
req := fmt.Sprintf(reqTempl, originURL.Path, originURL.Host)
t.Log("\n" + req)
_, err := conn.Write([]byte(req))
if !assert.NoError(t, err, "should write GET request") {
t.FailNow()
}
buf := [400]byte{}
_, err = conn.Read(buf[:])
assert.Contains(t, string(buf[:]), originResponse, "should read tunneled response")
}
testFail := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
req := fmt.Sprintf(reqTempl, originURL.Path, originURL.Host)
t.Log("\n" + req)
_, err := conn.Write([]byte(req))
if !assert.NoError(t, err, "should write GET request") {
t.FailNow()
}
buf := [400]byte{}
_, err = conn.Read(buf[:])
t.Log("\n" + string(buf[:]))
assert.Contains(t, string(buf[:]), failResp, "should respond with 500 Internal Server Error")
}
testRoundTrip(t, httpProxy, httpOriginServer, testOk)
testRoundTrip(t, tlsProxy, httpOriginServer, testOk)
// HTTPS can't be tunneled using Direct Proxying, as redirections
// require a TLS handshake between the proxy and the origin
testRoundTrip(t, httpProxy, tlsOriginServer, testFail)
testRoundTrip(t, tlsProxy, tlsOriginServer, testFail)
}
func TestInvalidRequest(t *testing.T) {
connectResp := "HTTP/1.1 400 Bad Request\r\n"
testFn := func(conn net.Conn, proxy *server.Server, originURL *url.URL) {
_, err := conn.Write([]byte("GET HTTP/1.1\r\n\r\n"))
if !assert.NoError(t, err, "should write GET request") {
t.FailNow()
}
buf := [400]byte{}
_, err = conn.Read(buf[:])
assert.Contains(t, string(buf[:]), connectResp, "should 400")
}
for i := 0; i < 10; i++ {
testRoundTrip(t, httpProxy, tlsOriginServer, testFn)
testRoundTrip(t, tlsProxy, tlsOriginServer, testFn)
}
}
//
// Auxiliary functions
//
func testRoundTrip(t *testing.T, proxy *server.Server, origin *originHandler, checkerFn func(conn net.Conn, proxy *server.Server, originURL *url.URL)) {
var conn net.Conn
var err error
addr := proxy.Addr.String()
if !proxy.Tls {
conn, err = net.Dial("tcp", addr)
log.Debugf("%s -> %s (via HTTP) -> %s", conn.LocalAddr().String(), addr, origin.server.URL)
if !assert.NoError(t, err, "should dial proxy server") {
t.FailNow()
}
} else {
var tlsConn *tls.Conn
x509cert := serverCertificate.X509()
tlsConn, err = tls.Dial("tcp", addr, &tls.Config{
CipherSuites: preferredCipherSuites,
InsecureSkipVerify: true,
})
log.Debugf("%s -> %s (via HTTPS) -> %s", tlsConn.LocalAddr().String(), addr, origin.server.URL)
if !assert.NoError(t, err, "should dial proxy server") {
t.FailNow()
}
conn = tlsConn
if !tlsConn.ConnectionState().PeerCertificates[0].Equal(x509cert) {
if err := tlsConn.Close(); err != nil {
log.Errorf("Error closing chained server connection: %s", err)
}
t.Fatal("Server's certificate didn't match expected")
}
}
defer func() {
assert.NoError(t, conn.Close(), "should close connection")
}()
url, _ := url.Parse(origin.server.URL)
checkerFn(conn, proxy, url)
}
//
// Proxy server
//
type proxy struct {
protocol string
addr string
}
func basicServer(maxConns uint64, idleTimeout time.Duration) *server.Server {
// Middleware: Forward HTTP Messages
forwarder, err := forward.New(nil, forward.IdleTimeoutSetter(idleTimeout))
if err != nil {
log.Error(err)
}
// Middleware: Handle HTTP CONNECT
httpConnect, err := httpconnect.New(forwarder, httpconnect.IdleTimeoutSetter(idleTimeout))
if err != nil {
log.Error(err)
}
// Middleware: Common request filter
commonHandler, err := commonfilter.New(httpConnect, testingLocal)
if err != nil {
log.Error(err)
}
// Create server
srv := server.NewServer(commonHandler)
// Add net.Listener wrappers for inbound connections
srv.AddListenerWrappers(
// Limit max number of simultaneous connections
func(ls net.Listener) net.Listener {
return listeners.NewLimitedListener(ls, maxConns)
},
// Close connections after 30 seconds of no activity
func(ls net.Listener) net.Listener {
return listeners.NewIdleConnListener(ls, idleTimeout)
},
)
return srv
}
func setupNewHTTPServer(maxConns uint64, idleTimeout time.Duration) (*server.Server, error) {
s := basicServer(maxConns, idleTimeout)
var err error
ready := make(chan string)
wait := func(addr string) {
ready <- addr
}
go func(err *error) {
if *err = s.ServeHTTP("localhost:0", wait); err != nil {
log.Errorf("Unable to serve: %s", err)
}
}(&err)
<-ready
return s, err
}
func setupNewHTTPSServer(maxConns uint64, idleTimeout time.Duration) (*server.Server, error) {
s := basicServer(maxConns, idleTimeout)
var err error
ready := make(chan string)
wait := func(addr string) {
ready <- addr
}
go func(err *error) {
if *err = s.ServeHTTPS("localhost:0", "key.pem", "cert.pem", wait); err != nil {
log.Errorf("Unable to serve: %s", err)
}
}(&err)
<-ready
if err != nil {
return nil, err
}
serverCertificate, err = keyman.LoadCertificateFromFile("cert.pem")
return s, err
}
//
// Mock origin server
// Emulating locally an origin server for testing tunnels
//
type originHandler struct {
writer func(w http.ResponseWriter)
server *httptest.Server
}
func (m *originHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
m.writer(w)
}
func (m *originHandler) Raw(msg string) {
m.writer = func(w http.ResponseWriter) {
conn, _, _ := w.(http.Hijacker).Hijack()
if _, err := conn.Write([]byte(msg)); err != nil {
log.Errorf("Unable to write to connection: %v", err)
}
if err := conn.Close(); err != nil {
log.Errorf("Unable to close connection: %v", err)
}
}
}
func (m *originHandler) Msg(msg string) {
m.writer = func(w http.ResponseWriter) {
w.Header()["Content-Length"] = []string{strconv.Itoa(len(msg))}
_, _ = w.Write([]byte(msg))
w.(http.Flusher).Flush()
}
}
func (m *originHandler) Timeout(d time.Duration, msg string) {
m.writer = func(w http.ResponseWriter) {
time.Sleep(d)
w.Header()["Content-Length"] = []string{strconv.Itoa(len(msg))}
_, _ = w.Write([]byte(msg))
w.(http.Flusher).Flush()
}
}
func (m *originHandler) Close() {
m.server.Close()
}
func newOriginHandler(msg string, tls bool) (string, *originHandler) {
m := originHandler{}
m.Msg(msg)
if tls {
m.server = httptest.NewTLSServer(&m)
} else {
m.server = httptest.NewServer(&m)
}
log.Debugf("Started origin server at %v", m.server.URL)
return m.server.URL, &m
}
//
//
// Mock Redis reporter
//
type mockReporter struct {
error map[measured.Error]int
latency []*measured.LatencyTracker
traffic []*measured.TrafficTracker
}
func (nr *mockReporter) ReportError(e map[*measured.Error]int) error {
for k, v := range e {
nr.error[*k] = nr.error[*k] + v
}
return nil
}
func (nr *mockReporter) ReportLatency(l []*measured.LatencyTracker) error {
nr.latency = append(nr.latency, l...)
return nil
}
func (nr *mockReporter) ReportTraffic(t []*measured.TrafficTracker) error {
nr.traffic = append(nr.traffic, t...)
return nil
}