traefik/middlewares/errorpages/error_pages_test.go

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package errorpages
import (
"fmt"
"net/http"
"net/http/httptest"
"strconv"
"testing"
"github.com/containous/traefik/testhelpers"
"github.com/containous/traefik/types"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/urfave/negroni"
)
func TestHandler(t *testing.T) {
testCases := []struct {
desc string
errorPage *types.ErrorPage
backendCode int
backendErrorHandler http.HandlerFunc
validate func(t *testing.T, recorder *httptest.ResponseRecorder)
}{
{
desc: "no error",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusOK,
backendErrorHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "My error page.")
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusOK, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), http.StatusText(http.StatusOK))
},
},
{
desc: "in the range",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusInternalServerError,
backendErrorHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "My error page.")
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusInternalServerError, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "My error page.")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
},
},
{
desc: "not in the range",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusBadGateway,
backendErrorHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "My error page.")
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusBadGateway, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), http.StatusText(http.StatusBadGateway))
assert.NotContains(t, recorder.Body.String(), "Test Server", "Should return the oops page since we have not configured the 502 code")
},
},
{
desc: "query replacement",
errorPage: &types.ErrorPage{Backend: "error", Query: "/{status}", Status: []string{"503-503"}},
backendCode: http.StatusServiceUnavailable,
backendErrorHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.RequestURI == "/503" {
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fmt.Fprintln(w, "My 503 page.")
} else {
fmt.Fprintln(w, "Failed")
}
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusServiceUnavailable, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "My 503 page.")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
},
},
{
desc: "Single code",
errorPage: &types.ErrorPage{Backend: "error", Query: "/{status}", Status: []string{"503"}},
backendCode: http.StatusServiceUnavailable,
backendErrorHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.RequestURI == "/503" {
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fmt.Fprintln(w, "My 503 page.")
} else {
fmt.Fprintln(w, "Failed")
}
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusServiceUnavailable, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "My 503 page.")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
errorPageHandler, err := NewHandler(test.errorPage, "test")
require.NoError(t, err)
errorPageHandler.backendHandler = test.backendErrorHandler
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(test.backendCode)
fmt.Fprintln(w, http.StatusText(test.backendCode))
})
req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost/test", nil)
n := negroni.New()
n.Use(errorPageHandler)
n.UseHandler(handler)
recorder := httptest.NewRecorder()
n.ServeHTTP(recorder, req)
test.validate(t, recorder)
})
}
}
func TestHandlerOldWay(t *testing.T) {
testCases := []struct {
desc string
errorPage *types.ErrorPage
backendCode int
errorPageForwarder http.HandlerFunc
validate func(t *testing.T, recorder *httptest.ResponseRecorder)
}{
{
desc: "no error",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusOK,
errorPageForwarder: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "My error page.")
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusOK, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "OK")
},
},
{
desc: "in the range",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusInternalServerError,
errorPageForwarder: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "My error page.")
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusInternalServerError, recorder.Code)
assert.Contains(t, recorder.Body.String(), "My error page.")
assert.NotContains(t, recorder.Body.String(), http.StatusText(http.StatusInternalServerError), "Should not return the oops page")
},
},
{
desc: "not in the range",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusBadGateway,
errorPageForwarder: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "My error page.")
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusBadGateway, recorder.Code)
assert.Contains(t, recorder.Body.String(), http.StatusText(http.StatusBadGateway))
assert.NotContains(t, recorder.Body.String(), "My error page.", "Should return the oops page since we have not configured the 502 code")
},
},
{
desc: "query replacement",
errorPage: &types.ErrorPage{Backend: "error", Query: "/{status}", Status: []string{"503-503"}},
backendCode: http.StatusServiceUnavailable,
errorPageForwarder: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.RequestURI() == "/"+strconv.Itoa(503) {
fmt.Fprintln(w, "My 503 page.")
} else {
fmt.Fprintln(w, "Failed")
}
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusServiceUnavailable, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "My 503 page.")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
},
},
{
desc: "Single code",
errorPage: &types.ErrorPage{Backend: "error", Query: "/{status}", Status: []string{"503"}},
backendCode: http.StatusServiceUnavailable,
errorPageForwarder: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.RequestURI() == "/"+strconv.Itoa(503) {
fmt.Fprintln(w, "My 503 page.")
} else {
fmt.Fprintln(w, "Failed")
}
}),
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusServiceUnavailable, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "My 503 page.")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
},
},
}
req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost/test", nil)
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
errorPageHandler, err := NewHandler(test.errorPage, "test")
require.NoError(t, err)
errorPageHandler.FallbackURL = "http://localhost"
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err = errorPageHandler.PostLoad(test.errorPageForwarder)
require.NoError(t, err)
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handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(test.backendCode)
fmt.Fprintln(w, http.StatusText(test.backendCode))
})
n := negroni.New()
n.Use(errorPageHandler)
n.UseHandler(handler)
recorder := httptest.NewRecorder()
n.ServeHTTP(recorder, req)
test.validate(t, recorder)
})
}
}
func TestHandlerOldWayIntegration(t *testing.T) {
errorPagesServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.URL.RequestURI() == "/503" {
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fmt.Fprintln(w, "My 503 page.")
} else {
fmt.Fprintln(w, "Test Server")
}
}))
defer errorPagesServer.Close()
testCases := []struct {
desc string
errorPage *types.ErrorPage
backendCode int
validate func(t *testing.T, recorder *httptest.ResponseRecorder)
}{
{
desc: "no error",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusOK,
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusOK, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "OK")
},
},
{
desc: "in the range",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusInternalServerError,
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusInternalServerError, recorder.Code)
assert.Contains(t, recorder.Body.String(), "Test Server")
assert.NotContains(t, recorder.Body.String(), http.StatusText(http.StatusInternalServerError), "Should not return the oops page")
},
},
{
desc: "not in the range",
errorPage: &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}},
backendCode: http.StatusBadGateway,
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusBadGateway, recorder.Code)
assert.Contains(t, recorder.Body.String(), http.StatusText(http.StatusBadGateway))
assert.NotContains(t, recorder.Body.String(), "Test Server", "Should return the oops page since we have not configured the 502 code")
},
},
{
desc: "query replacement",
errorPage: &types.ErrorPage{Backend: "error", Query: "/{status}", Status: []string{"503-503"}},
backendCode: http.StatusServiceUnavailable,
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusServiceUnavailable, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "My 503 page.")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
},
},
{
desc: "Single code",
errorPage: &types.ErrorPage{Backend: "error", Query: "/{status}", Status: []string{"503"}},
backendCode: http.StatusServiceUnavailable,
validate: func(t *testing.T, recorder *httptest.ResponseRecorder) {
assert.Equal(t, http.StatusServiceUnavailable, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "My 503 page.")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
},
},
}
req := testhelpers.MustNewRequest(http.MethodGet, errorPagesServer.URL+"/test", nil)
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
errorPageHandler, err := NewHandler(test.errorPage, "test")
require.NoError(t, err)
errorPageHandler.FallbackURL = errorPagesServer.URL
err = errorPageHandler.PostLoad(nil)
require.NoError(t, err)
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(test.backendCode)
fmt.Fprintln(w, http.StatusText(test.backendCode))
})
n := negroni.New()
n.Use(errorPageHandler)
n.UseHandler(handler)
recorder := httptest.NewRecorder()
n.ServeHTTP(recorder, req)
test.validate(t, recorder)
})
}
}
func TestNewResponseRecorder(t *testing.T) {
testCases := []struct {
desc string
rw http.ResponseWriter
expected http.ResponseWriter
}{
{
desc: "Without Close Notify",
rw: httptest.NewRecorder(),
expected: &responseRecorderWithoutCloseNotify{},
},
{
desc: "With Close Notify",
rw: &mockRWCloseNotify{},
expected: &responseRecorderWithCloseNotify{},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
rec := newResponseRecorder(test.rw)
assert.IsType(t, rec, test.expected)
})
}
}
type mockRWCloseNotify struct{}
func (m *mockRWCloseNotify) CloseNotify() <-chan bool {
panic("implement me")
}
func (m *mockRWCloseNotify) Header() http.Header {
panic("implement me")
}
func (m *mockRWCloseNotify) Write([]byte) (int, error) {
panic("implement me")
}
func (m *mockRWCloseNotify) WriteHeader(int) {
panic("implement me")
}