// Makes sure hop-by-hop headers are removed
func (s *FwdSuite) TestForwardedHeaders(c *C) {
var outHeaders http.Header
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
outHeaders = req.Header
w.Write([]byte("hello"))
})
defer srv.Close()
f, err := New(Rewriter(&HeaderRewriter{TrustForwardHeader: true, Hostname: "hello"}))
c.Assert(err, IsNil)
proxy := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
f.ServeHTTP(w, req)
})
defer proxy.Close()
headers := http.Header{
XForwardedProto: []string{"httpx"},
XForwardedFor: []string{"192.168.1.1"},
XForwardedServer: []string{"foobar"},
}
re, _, err := testutils.Get(proxy.URL, testutils.Headers(headers))
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(outHeaders.Get(XForwardedProto), Equals, "httpx")
c.Assert(strings.Contains(outHeaders.Get(XForwardedFor), "192.168.1.1"), Equals, true)
c.Assert(outHeaders.Get(XForwardedServer), Equals, "hello")
}
func (s *FwdSuite) TestEscapedURL(c *C) {
var outURL string
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
outURL = req.RequestURI
w.Write([]byte("hello"))
})
defer srv.Close()
f, err := New()
c.Assert(err, IsNil)
proxy := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
f.ServeHTTP(w, req)
})
defer proxy.Close()
path := "/log/http%3A%2F%2Fwww.site.com%2Fsomething?a=b"
request, err := http.NewRequest("GET", proxy.URL, nil)
parsed := testutils.ParseURI(proxy.URL)
parsed.Opaque = path
request.URL = parsed
re, err := http.DefaultClient.Do(request)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(outURL, Equals, path)
}
func (s *STSuite) TestFileStreamingResponse(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello, this response is too large to fit in memory"))
})
defer srv.Close()
// forwarder will proxy the request to whatever destination
fwd, err := forward.New()
c.Assert(err, IsNil)
// this is our redirect to server
rdr := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
fwd.ServeHTTP(w, req)
})
// stream handler will forward requests to redirect
st, err := New(rdr, Logger(utils.NewFileLogger(os.Stdout, utils.INFO)), MemResponseBodyBytes(4))
c.Assert(err, IsNil)
proxy := httptest.NewServer(st)
defer proxy.Close()
re, body, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(string(body), Equals, "hello, this response is too large to fit in memory")
}
func (s *FwdSuite) TestForwardedProto(c *C) {
var proto string
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
proto = req.Header.Get(XForwardedProto)
w.Write([]byte("hello"))
})
defer srv.Close()
buf := &bytes.Buffer{}
l := utils.NewFileLogger(buf, utils.INFO)
f, err := New(Logger(l))
c.Assert(err, IsNil)
proxy := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
f.ServeHTTP(w, req)
})
tproxy := httptest.NewUnstartedServer(proxy)
tproxy.StartTLS()
defer tproxy.Close()
re, _, err := testutils.Get(tproxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(proto, Equals, "https")
c.Assert(strings.Contains(buf.String(), "tls"), Equals, true)
}
func (s *STSuite) TestChunkedEncodingLimitReached(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello"))
})
defer srv.Close()
// forwarder will proxy the request to whatever destination
fwd, err := forward.New()
c.Assert(err, IsNil)
// this is our redirect to server
rdr := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
fwd.ServeHTTP(w, req)
})
// stream handler will forward requests to redirect
st, err := New(rdr, Logger(utils.NewFileLogger(os.Stdout, utils.INFO)), MemRequestBodyBytes(4), MaxRequestBodyBytes(8))
c.Assert(err, IsNil)
proxy := httptest.NewServer(st)
defer proxy.Close()
conn, err := net.Dial("tcp", testutils.ParseURI(proxy.URL).Host)
c.Assert(err, IsNil)
fmt.Fprintf(conn, "POST / HTTP/1.0\r\nTransfer-Encoding: chunked\r\n\r\n4\r\ntest\r\n5\r\ntest1\r\n5\r\ntest2\r\n0\r\n\r\n")
status, err := bufio.NewReader(conn).ReadString('\n')
c.Assert(status, Equals, "HTTP/1.0 413 Request Entity Too Large\r\n")
}
// Make sure that stream handler preserves TLS settings
func (s *STSuite) TestPreservesTLS(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("ok"))
})
defer srv.Close()
// forwarder will proxy the request to whatever destination
fwd, err := forward.New()
c.Assert(err, IsNil)
var t *tls.ConnectionState
// this is our redirect to server
rdr := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
t = req.TLS
req.URL = testutils.ParseURI(srv.URL)
fwd.ServeHTTP(w, req)
})
// stream handler will forward requests to redirect
st, err := New(rdr, Logger(utils.NewFileLogger(os.Stdout, utils.INFO)))
c.Assert(err, IsNil)
proxy := httptest.NewUnstartedServer(st)
proxy.StartTLS()
defer proxy.Close()
re, _, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(t, NotNil)
}
func (s *STSuite) TestNoBody(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.WriteHeader(http.StatusOK)
})
defer srv.Close()
// forwarder will proxy the request to whatever destination
fwd, err := forward.New()
c.Assert(err, IsNil)
// this is our redirect to server
rdr := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
fwd.ServeHTTP(w, req)
})
// stream handler will forward requests to redirect
st, err := New(rdr, Logger(utils.NewFileLogger(os.Stdout, utils.INFO)))
c.Assert(err, IsNil)
proxy := httptest.NewServer(st)
defer proxy.Close()
re, _, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusOK)
}
func (s *STSuite) TestCustomErrorHandler(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello, this response is too large"))
})
defer srv.Close()
// forwarder will proxy the request to whatever destination
fwd, err := forward.New()
c.Assert(err, IsNil)
// this is our redirect to server
rdr := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
fwd.ServeHTTP(w, req)
})
// stream handler will forward requests to redirect
errHandler := utils.ErrorHandlerFunc(func(w http.ResponseWriter, req *http.Request, err error) {
w.WriteHeader(http.StatusTeapot)
w.Write([]byte(http.StatusText(http.StatusTeapot)))
})
st, err := New(rdr, Logger(utils.NewFileLogger(os.Stdout, utils.INFO)), MaxResponseBodyBytes(4), ErrorHandler(errHandler))
c.Assert(err, IsNil)
proxy := httptest.NewServer(st)
defer proxy.Close()
re, _, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusTeapot)
}
func (s *STSuite) TestRequestLimitReached(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello"))
})
defer srv.Close()
// forwarder will proxy the request to whatever destination
fwd, err := forward.New()
c.Assert(err, IsNil)
// this is our redirect to server
rdr := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
fwd.ServeHTTP(w, req)
})
// stream handler will forward requests to redirect
st, err := New(rdr, Logger(utils.NewFileLogger(os.Stdout, utils.INFO)), MaxRequestBodyBytes(4))
c.Assert(err, IsNil)
proxy := httptest.NewServer(st)
defer proxy.Close()
re, _, err := testutils.Get(proxy.URL, testutils.Body("this request is too long"))
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusRequestEntityTooLarge)
}
func (s *FwdSuite) TestCustomTransportTimeout(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
time.Sleep(20 * time.Millisecond)
w.Write([]byte("hello"))
})
defer srv.Close()
f, err := New(RoundTripper(
&http.Transport{
ResponseHeaderTimeout: 5 * time.Millisecond,
}))
c.Assert(err, IsNil)
proxy := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
f.ServeHTTP(w, req)
})
defer proxy.Close()
re, _, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusGatewayTimeout)
}
func (s *FwdSuite) TestCustomLogger(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello"))
})
defer srv.Close()
buf := &bytes.Buffer{}
l := utils.NewFileLogger(buf, utils.INFO)
f, err := New(Logger(l))
c.Assert(err, IsNil)
proxy := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
f.ServeHTTP(w, req)
})
defer proxy.Close()
re, _, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(strings.Contains(buf.String(), srv.URL), Equals, true)
}
func (s *FwdSuite) TestDefaultErrHandler(c *C) {
f, err := New()
c.Assert(err, IsNil)
proxy := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI("http://localhost:63450")
f.ServeHTTP(w, req)
})
defer proxy.Close()
re, _, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusBadGateway)
}
func (s *FwdSuite) TestChunkedResponseConversion(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
h := w.(http.Hijacker)
conn, _, _ := h.Hijack()
fmt.Fprintf(conn, "HTTP/1.0 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n4\r\ntest\r\n5\r\ntest1\r\n5\r\ntest2\r\n0\r\n\r\n")
conn.Close()
})
defer srv.Close()
f, err := New()
c.Assert(err, IsNil)
proxy := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
f.ServeHTTP(w, req)
})
defer proxy.Close()
re, body, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(string(body), Equals, "testtest1test2")
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(re.Header.Get("Content-Length"), Equals, fmt.Sprintf("%d", len("testtest1test2")))
}
// Makes sure hop-by-hop headers are removed
func (s *FwdSuite) TestForwardHopHeaders(c *C) {
called := false
var outHeaders http.Header
var outHost, expectedHost string
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
called = true
outHeaders = req.Header
outHost = req.Host
w.Write([]byte("hello"))
})
defer srv.Close()
f, err := New()
c.Assert(err, IsNil)
proxy := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
expectedHost = req.URL.Host
f.ServeHTTP(w, req)
})
defer proxy.Close()
headers := http.Header{
Connection: []string{"close"},
KeepAlive: []string{"timeout=600"},
}
re, body, err := testutils.Get(proxy.URL, testutils.Headers(headers))
c.Assert(err, IsNil)
c.Assert(string(body), Equals, "hello")
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(called, Equals, true)
c.Assert(outHeaders.Get(Connection), Equals, "")
c.Assert(outHeaders.Get(KeepAlive), Equals, "")
c.Assert(outHost, Equals, expectedHost)
}
func (s *RTSuite) TestSuccess(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello"))
})
defer srv.Close()
lb, rt := new(c, `IsNetworkError() && Attempts() <= 2`)
proxy := httptest.NewServer(rt)
defer proxy.Close()
lb.UpsertServer(testutils.ParseURI(srv.URL))
re, body, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusOK)
c.Assert(string(body), Equals, "hello")
}
func (s *FwdSuite) TestCustomErrHandler(c *C) {
f, err := New(ErrorHandler(utils.ErrorHandlerFunc(func(w http.ResponseWriter, req *http.Request, err error) {
w.WriteHeader(http.StatusTeapot)
w.Write([]byte(http.StatusText(http.StatusTeapot)))
})))
c.Assert(err, IsNil)
proxy := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI("http://localhost:63450")
f.ServeHTTP(w, req)
})
defer proxy.Close()
re, body, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusTeapot)
c.Assert(string(body), Equals, http.StatusText(http.StatusTeapot))
}
func (s *RTSuite) TestRetryExceedAttempts(c *C) {
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello"))
})
defer srv.Close()
lb, rt := new(c, `IsNetworkError() && Attempts() <= 2`)
proxy := httptest.NewServer(rt)
defer proxy.Close()
lb.UpsertServer(testutils.ParseURI("http://localhost:64321"))
lb.UpsertServer(testutils.ParseURI("http://localhost:64322"))
lb.UpsertServer(testutils.ParseURI("http://localhost:64323"))
lb.UpsertServer(testutils.ParseURI(srv.URL))
re, _, err := testutils.Get(proxy.URL)
c.Assert(err, IsNil)
c.Assert(re.StatusCode, Equals, http.StatusBadGateway)
}
func (s *STSuite) TestChunkedEncodingSuccess(c *C) {
var reqBody string
var contentLength int64
srv := testutils.NewHandler(func(w http.ResponseWriter, req *http.Request) {
body, err := ioutil.ReadAll(req.Body)
c.Assert(err, IsNil)
reqBody = string(body)
contentLength = req.ContentLength
w.Write([]byte("hello"))
})
defer srv.Close()
// forwarder will proxy the request to whatever destination
fwd, err := forward.New()
c.Assert(err, IsNil)
// this is our redirect to server
rdr := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
req.URL = testutils.ParseURI(srv.URL)
fwd.ServeHTTP(w, req)
})
// stream handler will forward requests to redirect
st, err := New(rdr, Logger(utils.NewFileLogger(os.Stdout, utils.INFO)))
c.Assert(err, IsNil)
proxy := httptest.NewServer(st)
defer proxy.Close()
conn, err := net.Dial("tcp", testutils.ParseURI(proxy.URL).Host)
c.Assert(err, IsNil)
fmt.Fprintf(conn, "POST / HTTP/1.0\r\nTransfer-Encoding: chunked\r\n\r\n4\r\ntest\r\n5\r\ntest1\r\n5\r\ntest2\r\n0\r\n\r\n")
status, err := bufio.NewReader(conn).ReadString('\n')
c.Assert(reqBody, Equals, "testtest1test2")
c.Assert(status, Equals, "HTTP/1.0 200 OK\r\n")
c.Assert(contentLength, Equals, int64(len(reqBody)))
}
func (s *CBSuite) TestSideEffects(c *C) {
srv1Chan := make(chan *http.Request, 1)
var srv1Body []byte
srv1 := testutils.NewHandler(func(w http.ResponseWriter, r *http.Request) {
b, err := ioutil.ReadAll(r.Body)
c.Assert(err, IsNil)
srv1Body = b
w.Write([]byte("srv1"))
srv1Chan <- r
})
defer srv1.Close()
srv2Chan := make(chan *http.Request, 1)
srv2 := testutils.NewHandler(func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("srv2"))
r.ParseForm()
srv2Chan <- r
})
defer srv2.Close()
onTripped, err := NewWebhookSideEffect(
Webhook{
URL: fmt.Sprintf("%s/post.json", srv1.URL),
Method: "POST",
Headers: map[string][]string{"Content-Type": []string{"application/json"}},
Body: []byte(`{"Key": ["val1", "val2"]}`),
})
c.Assert(err, IsNil)
onStandby, err := NewWebhookSideEffect(
Webhook{
URL: fmt.Sprintf("%s/post", srv2.URL),
Method: "POST",
Form: map[string][]string{"key": []string{"val1", "val2"}},
})
c.Assert(err, IsNil)
handler := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello"))
})
cb, err := New(handler, triggerNetRatio, Clock(s.clock), CheckPeriod(time.Microsecond), OnTripped(onTripped), OnStandby(onStandby))
c.Assert(err, IsNil)
srv := httptest.NewServer(cb)
defer srv.Close()
cb.metrics = statsNetErrors(0.6)
_, _, err = testutils.Get(srv.URL)
c.Assert(err, IsNil)
c.Assert(cb.state, Equals, cbState(stateTripped))
select {
case req := <-srv1Chan:
c.Assert(req.Method, Equals, "POST")
c.Assert(req.URL.Path, Equals, "/post.json")
c.Assert(string(srv1Body), Equals, `{"Key": ["val1", "val2"]}`)
c.Assert(req.Header.Get("Content-Type"), Equals, "application/json")
case <-time.After(time.Second):
c.Error("timeout waiting for side effect to kick off")
}
// Transition to recovering state
s.advanceTime(10*time.Second + time.Millisecond)
cb.metrics = statsOK()
testutils.Get(srv.URL)
c.Assert(cb.state, Equals, cbState(stateRecovering))
// Going back to standby
s.advanceTime(10*time.Second + time.Millisecond)
testutils.Get(srv.URL)
c.Assert(cb.state, Equals, cbState(stateStandby))
select {
case req := <-srv2Chan:
c.Assert(req.Method, Equals, "POST")
c.Assert(req.URL.Path, Equals, "/post")
c.Assert(req.Form, DeepEquals, url.Values{"key": []string{"val1", "val2"}})
case <-time.After(time.Second):
c.Error("timeout waiting for side effect to kick off")
}
}