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// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
package middleware
import (
"bufio"
"errors"
"github.com/stretchr/testify/assert"
"net"
"net/http"
"net/http/httptest"
"regexp"
"testing"
)
func TestRewriteURL(t *testing.T) {
var testCases = []struct {
whenURL string
expectPath string
expectRawPath string
expectQuery string
expectErr string
}{
{
whenURL: "http://localhost:8080/old",
expectPath: "/new",
expectRawPath: "",
},
{ // encoded `ol%64` (decoded `old`) should not be rewritten to `/new`
whenURL: "/ol%64", // `%64` is decoded `d`
expectPath: "/old",
expectRawPath: "/ol%64",
},
{
whenURL: "http://localhost:8080/users/+_+/orders/___++++?test=1",
expectPath: "/user/+_+/order/___++++",
expectRawPath: "",
expectQuery: "test=1",
},
{
whenURL: "http://localhost:8080/users/%20a/orders/%20aa",
expectPath: "/user/ a/order/ aa",
expectRawPath: "",
},
{
whenURL: "http://localhost:8080/%47%6f%2f?test=1",
expectPath: "/Go/",
expectRawPath: "/%47%6f%2f",
expectQuery: "test=1",
},
{
whenURL: "/users/jill/orders/T%2FcO4lW%2Ft%2FVp%2F",
expectPath: "/user/jill/order/T/cO4lW/t/Vp/",
expectRawPath: "/user/jill/order/T%2FcO4lW%2Ft%2FVp%2F",
},
{ // do nothing, replace nothing
whenURL: "http://localhost:8080/user/jill/order/T%2FcO4lW%2Ft%2FVp%2F",
expectPath: "/user/jill/order/T/cO4lW/t/Vp/",
expectRawPath: "/user/jill/order/T%2FcO4lW%2Ft%2FVp%2F",
},
{
whenURL: "http://localhost:8080/static",
expectPath: "/static/path",
expectRawPath: "",
expectQuery: "role=AUTHOR&limit=1000",
},
{
whenURL: "/static",
expectPath: "/static/path",
expectRawPath: "",
expectQuery: "role=AUTHOR&limit=1000",
},
}
rules := map[*regexp.Regexp]string{
regexp.MustCompile("^/old$"): "/new",
regexp.MustCompile("^/users/(.*?)/orders/(.*?)$"): "/user/$1/order/$2",
regexp.MustCompile("^/static$"): "/static/path?role=AUTHOR&limit=1000",
}
for _, tc := range testCases {
t.Run(tc.whenURL, func(t *testing.T) {
req := httptest.NewRequest(http.MethodGet, tc.whenURL, nil)
err := rewriteURL(rules, req)
if tc.expectErr != "" {
assert.EqualError(t, err, tc.expectErr)
} else {
assert.NoError(t, err)
}
assert.Equal(t, tc.expectPath, req.URL.Path) // Path field is stored in decoded form: /%47%6f%2f becomes /Go/.
assert.Equal(t, tc.expectRawPath, req.URL.RawPath) // RawPath, an optional field which only gets set if the default encoding is different from Path.
assert.Equal(t, tc.expectQuery, req.URL.RawQuery)
})
}
}
type testResponseWriterNoFlushHijack struct {
}
func (w *testResponseWriterNoFlushHijack) WriteHeader(statusCode int) {
}
func (w *testResponseWriterNoFlushHijack) Write([]byte) (int, error) {
return 0, nil
}
func (w *testResponseWriterNoFlushHijack) Header() http.Header {
return nil
}
type testResponseWriterUnwrapper struct {
unwrapCalled int
rw http.ResponseWriter
}
func (w *testResponseWriterUnwrapper) WriteHeader(statusCode int) {
}
func (w *testResponseWriterUnwrapper) Write([]byte) (int, error) {
return 0, nil
}
func (w *testResponseWriterUnwrapper) Header() http.Header {
return nil
}
func (w *testResponseWriterUnwrapper) Unwrap() http.ResponseWriter {
w.unwrapCalled++
return w.rw
}
type testResponseWriterUnwrapperHijack struct {
testResponseWriterUnwrapper
}
func (w *testResponseWriterUnwrapperHijack) Hijack() (net.Conn, *bufio.ReadWriter, error) {
return nil, nil, errors.New("can hijack")
}
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