traefik/middlewares/error_pages_test.go

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package middlewares
import (
"fmt"
"net/http"
"net/http/httptest"
"strconv"
"testing"
"github.com/containous/traefik/types"
"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
"github.com/urfave/negroni"
)
func TestErrorPage(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "Test Server")
}))
defer ts.Close()
testErrorPage := &types.ErrorPage{Backend: "error", Query: "/test", Status: []string{"500-501", "503-599"}}
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testHandler, err := NewErrorPagesHandler(testErrorPage, ts.URL)
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require.NoError(t, err)
assert.Equal(t, testHandler.BackendURL, ts.URL+"/test", "Should be equal")
recorder := httptest.NewRecorder()
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req, err := http.NewRequest(http.MethodGet, ts.URL+"/test", nil)
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require.NoError(t, err)
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "traefik")
})
n := negroni.New()
n.Use(testHandler)
n.UseHandler(handler)
n.ServeHTTP(recorder, req)
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assert.Equal(t, http.StatusOK, recorder.Code, "HTTP status")
assert.Contains(t, recorder.Body.String(), "traefik")
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// ----
handler500 := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintln(w, "oops")
})
recorder500 := httptest.NewRecorder()
n500 := negroni.New()
n500.Use(testHandler)
n500.UseHandler(handler500)
n500.ServeHTTP(recorder500, req)
assert.Equal(t, http.StatusInternalServerError, recorder500.Code, "HTTP status Internal Server Error")
assert.Contains(t, recorder500.Body.String(), "Test Server")
assert.NotContains(t, recorder500.Body.String(), "oops", "Should not return the oops page")
handler502 := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusBadGateway)
fmt.Fprintln(w, "oops")
})
recorder502 := httptest.NewRecorder()
n502 := negroni.New()
n502.Use(testHandler)
n502.UseHandler(handler502)
n502.ServeHTTP(recorder502, req)
assert.Equal(t, http.StatusBadGateway, recorder502.Code, "HTTP status Bad Gateway")
assert.Contains(t, recorder502.Body.String(), "oops")
assert.NotContains(t, recorder502.Body.String(), "Test Server", "Should return the oops page since we have not configured the 502 code")
}
func TestErrorPageQuery(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.RequestURI() == "/"+strconv.Itoa(503) {
fmt.Fprintln(w, "503 Test Server")
} else {
fmt.Fprintln(w, "Failed")
}
}))
defer ts.Close()
testErrorPage := &types.ErrorPage{Backend: "error", Query: "/{status}", Status: []string{"503-503"}}
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testHandler, err := NewErrorPagesHandler(testErrorPage, ts.URL)
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require.NoError(t, err)
assert.Equal(t, testHandler.BackendURL, ts.URL+"/{status}", "Should be equal")
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusServiceUnavailable)
fmt.Fprintln(w, "oops")
})
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recorder := httptest.NewRecorder()
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req, err := http.NewRequest(http.MethodGet, ts.URL+"/test", nil)
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require.NoError(t, err)
n := negroni.New()
n.Use(testHandler)
n.UseHandler(handler)
n.ServeHTTP(recorder, req)
assert.Equal(t, http.StatusServiceUnavailable, recorder.Code, "HTTP status Service Unavailable")
assert.Contains(t, recorder.Body.String(), "503 Test Server")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
}
func TestErrorPageSingleCode(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.RequestURI() == "/"+strconv.Itoa(503) {
fmt.Fprintln(w, "503 Test Server")
} else {
fmt.Fprintln(w, "Failed")
}
}))
defer ts.Close()
testErrorPage := &types.ErrorPage{Backend: "error", Query: "/{status}", Status: []string{"503"}}
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testHandler, err := NewErrorPagesHandler(testErrorPage, ts.URL)
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require.NoError(t, err)
assert.Equal(t, testHandler.BackendURL, ts.URL+"/{status}", "Should be equal")
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusServiceUnavailable)
fmt.Fprintln(w, "oops")
})
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recorder := httptest.NewRecorder()
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req, err := http.NewRequest(http.MethodGet, ts.URL+"/test", nil)
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require.NoError(t, err)
n := negroni.New()
n.Use(testHandler)
n.UseHandler(handler)
n.ServeHTTP(recorder, req)
assert.Equal(t, http.StatusServiceUnavailable, recorder.Code, "HTTP status Service Unavailable")
assert.Contains(t, recorder.Body.String(), "503 Test Server")
assert.NotContains(t, recorder.Body.String(), "oops", "Should not return the oops page")
}
func TestNewErrorPagesResponseRecorder(t *testing.T) {
testCases := []struct {
desc string
rw http.ResponseWriter
expected http.ResponseWriter
}{
{
desc: "Without Close Notify",
rw: httptest.NewRecorder(),
expected: &errorPagesResponseRecorderWithoutCloseNotify{},
},
{
desc: "With Close Notify",
rw: &mockRWCloseNotify{},
expected: &errorPagesResponseRecorderWithCloseNotify{},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
rec := newErrorPagesResponseRecorder(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")
}