traefik/pkg/middlewares/replacepathregex/replace_path_regex_test.go

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package replacepathregex
import (
"context"
"net/http"
"net/http/httptest"
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"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
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"github.com/traefik/traefik/v3/pkg/config/dynamic"
"github.com/traefik/traefik/v3/pkg/middlewares/replacepath"
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)
func TestReplacePathRegex(t *testing.T) {
testCases := []struct {
desc string
path string
config dynamic.ReplacePathRegex
expectedPath string
expectedRawPath string
expectedHeader string
expectsError bool
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}{
{
desc: "simple regex",
path: "/whoami/and/whoami",
config: dynamic.ReplacePathRegex{
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Replacement: "/who-am-i/$1",
Regex: `^/whoami/(.*)`,
},
expectedPath: "/who-am-i/and/whoami",
expectedRawPath: "/who-am-i/and/whoami",
expectedHeader: "/whoami/and/whoami",
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},
{
desc: "simple replace (no regex)",
path: "/whoami/and/whoami",
config: dynamic.ReplacePathRegex{
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Replacement: "/who-am-i",
Regex: `/whoami`,
},
expectedPath: "/who-am-i/and/who-am-i",
expectedRawPath: "/who-am-i/and/who-am-i",
expectedHeader: "/whoami/and/whoami",
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},
{
desc: "empty replacement",
path: "/whoami/and/whoami",
config: dynamic.ReplacePathRegex{
Replacement: "",
Regex: `/whoami`,
},
expectedPath: "/and",
expectedRawPath: "/and",
expectedHeader: "/whoami/and/whoami",
},
{
desc: "empty trimmed replacement",
path: "/whoami/and/whoami",
config: dynamic.ReplacePathRegex{
Replacement: " ",
Regex: `/whoami`,
},
expectedPath: "/and",
expectedRawPath: "/and",
expectedHeader: "/whoami/and/whoami",
},
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{
desc: "no match",
path: "/whoami/and/whoami",
config: dynamic.ReplacePathRegex{
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Replacement: "/whoami",
Regex: `/no-match`,
},
expectedPath: "/whoami/and/whoami",
},
{
desc: "multiple replacement",
path: "/downloads/src/source.go",
config: dynamic.ReplacePathRegex{
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Replacement: "/downloads/$1-$2",
Regex: `^(?i)/downloads/([^/]+)/([^/]+)$`,
},
expectedPath: "/downloads/src-source.go",
expectedRawPath: "/downloads/src-source.go",
expectedHeader: "/downloads/src/source.go",
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},
{
desc: "invalid regular expression",
path: "/invalid/regexp/test",
config: dynamic.ReplacePathRegex{
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Replacement: "/valid/regexp/$1",
Regex: `^(?err)/invalid/regexp/([^/]+)$`,
},
expectedPath: "/invalid/regexp/test",
expectsError: true,
},
{
desc: "replacement with escaped char",
path: "/aaa/bbb",
config: dynamic.ReplacePathRegex{
Replacement: "/foo%2Fbar",
Regex: `/aaa/bbb`,
},
expectedPath: "/foo/bar",
expectedRawPath: "/foo%2Fbar",
expectedHeader: "/aaa/bbb",
},
{
desc: "path and regex with escaped char",
path: "/aaa%2Fbbb",
config: dynamic.ReplacePathRegex{
Replacement: "/foo/bar",
Regex: `/aaa%2Fbbb`,
},
expectedPath: "/foo/bar",
expectedRawPath: "/foo/bar",
expectedHeader: "/aaa%2Fbbb",
},
{
desc: "path with escaped char (no match)",
path: "/aaa%2Fbbb",
config: dynamic.ReplacePathRegex{
Replacement: "/foo/bar",
Regex: `/aaa/bbb`,
},
expectedPath: "/aaa/bbb",
expectedRawPath: "/aaa%2Fbbb",
},
{
desc: "path with percent encoded backspace char",
path: "/foo/%08bar",
config: dynamic.ReplacePathRegex{
Replacement: "/$1",
Regex: `^/foo/(.*)`,
},
expectedPath: "/\bbar",
expectedRawPath: "/%08bar",
},
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}
for _, test := range testCases {
t.Run(test.desc, func(t *testing.T) {
var actualPath, actualRawPath, actualHeader, requestURI string
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next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
actualPath = r.URL.Path
actualRawPath = r.URL.RawPath
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actualHeader = r.Header.Get(replacepath.ReplacedPathHeader)
requestURI = r.RequestURI
})
handler, err := New(context.Background(), next, test.config, "foo-replace-path-regexp")
if test.expectsError {
require.Error(t, err)
return
}
require.NoError(t, err)
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server := httptest.NewServer(handler)
defer server.Close()
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resp, err := http.Get(server.URL + test.path)
require.NoError(t, err, "Unexpected error while making test request")
require.Equal(t, http.StatusOK, resp.StatusCode)
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assert.Equal(t, test.expectedPath, actualPath, "Unexpected path.")
assert.Equal(t, test.expectedRawPath, actualRawPath, "Unexpected raw path.")
if actualRawPath == "" {
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assert.Equal(t, actualPath, requestURI, "Unexpected request URI.")
} else {
assert.Equal(t, actualRawPath, requestURI, "Unexpected request URI.")
}
if test.expectedHeader != "" {
assert.Equal(t, test.expectedHeader, actualHeader, "Unexpected '%s' header.", replacepath.ReplacedPathHeader)
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}
})
}
}