cloudflared-mirror/connection/h2mux_header_test.go

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package connection
import (
"fmt"
"math/rand"
"net/http"
"net/url"
"reflect"
"regexp"
"strings"
"testing"
"testing/quick"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/cloudflare/cloudflared/h2mux"
)
type ByName []h2mux.Header
func (a ByName) Len() int { return len(a) }
func (a ByName) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByName) Less(i, j int) bool {
if a[i].Name == a[j].Name {
return a[i].Value < a[j].Value
}
return a[i].Name < a[j].Name
}
func TestH2RequestHeadersToH1Request_RegularHeaders(t *testing.T) {
request, err := http.NewRequest(http.MethodGet, "http://example.com", nil)
assert.NoError(t, err)
mockHeaders := http.Header{
"Mock header 1": {"Mock value 1"},
"Mock header 2": {"Mock value 2"},
}
headersConversionErr := H2RequestHeadersToH1Request(createSerializedHeaders(RequestUserHeaders, mockHeaders), request)
assert.True(t, reflect.DeepEqual(mockHeaders, request.Header))
assert.NoError(t, headersConversionErr)
}
func createSerializedHeaders(headersField string, headers http.Header) []h2mux.Header {
return []h2mux.Header{{
Name: headersField,
Value: SerializeHeaders(headers),
}}
}
func TestH2RequestHeadersToH1Request_NoHeaders(t *testing.T) {
request, err := http.NewRequest(http.MethodGet, "http://example.com", nil)
assert.NoError(t, err)
emptyHeaders := make(http.Header)
headersConversionErr := H2RequestHeadersToH1Request(
[]h2mux.Header{{
Name: RequestUserHeaders,
Value: SerializeHeaders(emptyHeaders),
}},
request,
)
assert.True(t, reflect.DeepEqual(emptyHeaders, request.Header))
assert.NoError(t, headersConversionErr)
}
func TestH2RequestHeadersToH1Request_InvalidHostPath(t *testing.T) {
request, err := http.NewRequest(http.MethodGet, "http://example.com", nil)
assert.NoError(t, err)
mockRequestHeaders := []h2mux.Header{
{Name: ":path", Value: "//bad_path/"},
{Name: RequestUserHeaders, Value: SerializeHeaders(http.Header{"Mock header": {"Mock value"}})},
}
headersConversionErr := H2RequestHeadersToH1Request(mockRequestHeaders, request)
assert.Equal(t, http.Header{
"Mock header": []string{"Mock value"},
}, request.Header)
assert.Equal(t, "http://example.com//bad_path/", request.URL.String())
assert.NoError(t, headersConversionErr)
}
func TestH2RequestHeadersToH1Request_HostPathWithQuery(t *testing.T) {
request, err := http.NewRequest(http.MethodGet, "http://example.com/", nil)
assert.NoError(t, err)
mockRequestHeaders := []h2mux.Header{
{Name: ":path", Value: "/?query=mock%20value"},
{Name: RequestUserHeaders, Value: SerializeHeaders(http.Header{"Mock header": {"Mock value"}})},
}
headersConversionErr := H2RequestHeadersToH1Request(mockRequestHeaders, request)
assert.Equal(t, http.Header{
"Mock header": []string{"Mock value"},
}, request.Header)
assert.Equal(t, "http://example.com/?query=mock%20value", request.URL.String())
assert.NoError(t, headersConversionErr)
}
func TestH2RequestHeadersToH1Request_HostPathWithURLEncoding(t *testing.T) {
request, err := http.NewRequest(http.MethodGet, "http://example.com/", nil)
assert.NoError(t, err)
mockRequestHeaders := []h2mux.Header{
{Name: ":path", Value: "/mock%20path"},
{Name: RequestUserHeaders, Value: SerializeHeaders(http.Header{"Mock header": {"Mock value"}})},
}
headersConversionErr := H2RequestHeadersToH1Request(mockRequestHeaders, request)
assert.Equal(t, http.Header{
"Mock header": []string{"Mock value"},
}, request.Header)
assert.Equal(t, "http://example.com/mock%20path", request.URL.String())
assert.NoError(t, headersConversionErr)
}
func TestH2RequestHeadersToH1Request_WeirdURLs(t *testing.T) {
type testCase struct {
path string
want string
}
testCases := []testCase{
{
path: "",
want: "",
},
{
path: "/",
want: "/",
},
{
path: "//",
want: "//",
},
{
path: "/test",
want: "/test",
},
{
path: "//test",
want: "//test",
},
{
// https://github.com/cloudflare/cloudflared/issues/81
path: "//test/",
want: "//test/",
},
{
path: "/%2Ftest",
want: "/%2Ftest",
},
{
path: "//%20test",
want: "//%20test",
},
{
// https://github.com/cloudflare/cloudflared/issues/124
path: "/test?get=somthing%20a",
want: "/test?get=somthing%20a",
},
{
path: "/%20",
want: "/%20",
},
{
// stdlib's EscapedPath() will always percent-encode ' '
path: "/ ",
want: "/%20",
},
{
path: "/ a ",
want: "/%20a%20",
},
{
path: "/a%20b",
want: "/a%20b",
},
{
path: "/foo/bar;param?query#frag",
want: "/foo/bar;param?query#frag",
},
{
// stdlib's EscapedPath() will always percent-encode non-ASCII chars
path: "/a␠b",
want: "/a%E2%90%A0b",
},
{
path: "/a-umlaut-ä",
want: "/a-umlaut-%C3%A4",
},
{
path: "/a-umlaut-%C3%A4",
want: "/a-umlaut-%C3%A4",
},
{
path: "/a-umlaut-%c3%a4",
want: "/a-umlaut-%c3%a4",
},
{
// here the second '#' is treated as part of the fragment
path: "/a#b#c",
want: "/a#b%23c",
},
{
path: "/a#b␠c",
want: "/a#b%E2%90%A0c",
},
{
path: "/a#b%20c",
want: "/a#b%20c",
},
{
path: "/a#b c",
want: "/a#b%20c",
},
{
// stdlib's EscapedPath() will always percent-encode '\'
path: "/\\",
want: "/%5C",
},
{
path: "/a\\",
want: "/a%5C",
},
{
path: "/a,b.c.",
want: "/a,b.c.",
},
{
path: "/.",
want: "/.",
},
{
// stdlib's EscapedPath() will always percent-encode '`'
path: "/a`",
want: "/a%60",
},
{
path: "/a[0]",
want: "/a[0]",
},
{
path: "/?a[0]=5 &b[]=",
want: "/?a[0]=5 &b[]=",
},
{
path: "/?a=%22b%20%22",
want: "/?a=%22b%20%22",
},
}
for index, testCase := range testCases {
requestURL := "https://example.com"
request, err := http.NewRequest(http.MethodGet, requestURL, nil)
assert.NoError(t, err)
mockRequestHeaders := []h2mux.Header{
{Name: ":path", Value: testCase.path},
{Name: RequestUserHeaders, Value: SerializeHeaders(http.Header{"Mock header": {"Mock value"}})},
}
headersConversionErr := H2RequestHeadersToH1Request(mockRequestHeaders, request)
assert.NoError(t, headersConversionErr)
assert.Equal(t,
http.Header{
"Mock header": []string{"Mock value"},
},
request.Header)
assert.Equal(t,
"https://example.com"+testCase.want,
request.URL.String(),
"Failed URL index: %v %#v", index, testCase)
}
}
func TestH2RequestHeadersToH1Request_QuickCheck(t *testing.T) {
config := &quick.Config{
Values: func(args []reflect.Value, rand *rand.Rand) {
args[0] = reflect.ValueOf(randomHTTP2Path(t, rand))
},
}
type testOrigin struct {
url string
expectedScheme string
expectedBasePath string
}
testOrigins := []testOrigin{
{
url: "http://origin.hostname.example.com:8080",
expectedScheme: "http",
expectedBasePath: "http://origin.hostname.example.com:8080",
},
{
url: "http://origin.hostname.example.com:8080/",
expectedScheme: "http",
expectedBasePath: "http://origin.hostname.example.com:8080",
},
{
url: "http://origin.hostname.example.com:8080/api",
expectedScheme: "http",
expectedBasePath: "http://origin.hostname.example.com:8080/api",
},
{
url: "http://origin.hostname.example.com:8080/api/",
expectedScheme: "http",
expectedBasePath: "http://origin.hostname.example.com:8080/api",
},
{
url: "https://origin.hostname.example.com:8080/api",
expectedScheme: "https",
expectedBasePath: "https://origin.hostname.example.com:8080/api",
},
}
// use multiple schemes to demonstrate that the URL is based on the
// origin's scheme, not the :scheme header
for _, testScheme := range []string{"http", "https"} {
for _, testOrigin := range testOrigins {
assertion := func(testPath string) bool {
const expectedMethod = "POST"
const expectedHostname = "request.hostname.example.com"
h2 := []h2mux.Header{
{Name: ":method", Value: expectedMethod},
{Name: ":scheme", Value: testScheme},
{Name: ":authority", Value: expectedHostname},
{Name: ":path", Value: testPath},
{Name: RequestUserHeaders, Value: ""},
}
h1, err := http.NewRequest("GET", testOrigin.url, nil)
require.NoError(t, err)
err = H2RequestHeadersToH1Request(h2, h1)
return assert.NoError(t, err) &&
assert.Equal(t, expectedMethod, h1.Method) &&
assert.Equal(t, expectedHostname, h1.Host) &&
assert.Equal(t, testOrigin.expectedScheme, h1.URL.Scheme) &&
assert.Equal(t, testOrigin.expectedBasePath+testPath, h1.URL.String())
}
err := quick.Check(assertion, config)
assert.NoError(t, err)
}
}
}
func randomASCIIPrintableChar(rand *rand.Rand) int {
// smallest printable ASCII char is 32, largest is 126
const startPrintable = 32
const endPrintable = 127
return startPrintable + rand.Intn(endPrintable-startPrintable)
}
// randomASCIIText generates an ASCII string, some of whose characters may be
// percent-encoded. Its "logical length" (ignoring percent-encoding) is
// between 1 and `maxLength`.
func randomASCIIText(rand *rand.Rand, minLength int, maxLength int) string {
length := minLength + rand.Intn(maxLength)
var result strings.Builder
for i := 0; i < length; i++ {
c := randomASCIIPrintableChar(rand)
// 1/4 chance of using percent encoding when not necessary
if c == '%' || rand.Intn(4) == 0 {
result.WriteString(fmt.Sprintf("%%%02X", c))
} else {
result.WriteByte(byte(c))
}
}
return result.String()
}
// Calls `randomASCIIText` and ensures the result is a valid URL path,
// i.e. one that can pass unchanged through url.URL.String()
func randomHTTP1Path(t *testing.T, rand *rand.Rand, minLength int, maxLength int) string {
text := randomASCIIText(rand, minLength, maxLength)
re, err := regexp.Compile("[^/;,]*")
require.NoError(t, err)
return "/" + re.ReplaceAllStringFunc(text, url.PathEscape)
}
// Calls `randomASCIIText` and ensures the result is a valid URL query,
// i.e. one that can pass unchanged through url.URL.String()
func randomHTTP1Query(rand *rand.Rand, minLength int, maxLength int) string {
text := randomASCIIText(rand, minLength, maxLength)
return "?" + strings.ReplaceAll(text, "#", "%23")
}
// Calls `randomASCIIText` and ensures the result is a valid URL fragment,
// i.e. one that can pass unchanged through url.URL.String()
func randomHTTP1Fragment(t *testing.T, rand *rand.Rand, minLength int, maxLength int) string {
text := randomASCIIText(rand, minLength, maxLength)
u, err := url.Parse("#" + text)
require.NoError(t, err)
return u.String()
}
// Assemble a random :path pseudoheader that is legal by Go stdlib standards
// (i.e. all characters will satisfy "net/url".shouldEscape for their respective locations)
func randomHTTP2Path(t *testing.T, rand *rand.Rand) string {
result := randomHTTP1Path(t, rand, 1, 64)
if rand.Intn(2) == 1 {
result += randomHTTP1Query(rand, 1, 32)
}
if rand.Intn(2) == 1 {
result += randomHTTP1Fragment(t, rand, 1, 16)
}
return result
}
func stdlibHeaderToH2muxHeader(headers http.Header) (h2muxHeaders []h2mux.Header) {
for name, values := range headers {
for _, value := range values {
h2muxHeaders = append(h2muxHeaders, h2mux.Header{Name: name, Value: value})
}
}
return h2muxHeaders
}
func TestParseRequestHeaders(t *testing.T) {
mockUserHeadersToSerialize := http.Header{
"Mock-Header-One": {"1", "1.5"},
"Mock-Header-Two": {"2"},
"Mock-Header-Three": {"3"},
}
mockHeaders := []h2mux.Header{
{Name: "One", Value: "1"}, // will be dropped
{Name: "Cf-Two", Value: "cf-value-1"},
{Name: "Cf-Two", Value: "cf-value-2"},
{Name: RequestUserHeaders, Value: SerializeHeaders(mockUserHeadersToSerialize)},
}
expectedHeaders := []h2mux.Header{
{Name: "Cf-Two", Value: "cf-value-1"},
{Name: "Cf-Two", Value: "cf-value-2"},
{Name: "Mock-Header-One", Value: "1"},
{Name: "Mock-Header-One", Value: "1.5"},
{Name: "Mock-Header-Two", Value: "2"},
{Name: "Mock-Header-Three", Value: "3"},
}
h1 := &http.Request{
Header: make(http.Header),
}
err := H2RequestHeadersToH1Request(mockHeaders, h1)
assert.NoError(t, err)
assert.ElementsMatch(t, expectedHeaders, stdlibHeaderToH2muxHeader(h1.Header))
}
func TestIsH2muxControlRequestHeader(t *testing.T) {
controlRequestHeaders := []string{
// Anything that begins with cf-
"cf-sample-header",
// Any http2 pseudoheader
":sample-pseudo-header",
// content-length is a special case, it has to be there
// for some requests to work (per the HTTP2 spec)
"content-length",
// Websocket request headers
"connection",
"upgrade",
}
for _, header := range controlRequestHeaders {
assert.True(t, IsH2muxControlRequestHeader(header))
}
}
func TestIsH2muxControlResponseHeader(t *testing.T) {
controlResponseHeaders := []string{
// Anything that begins with cf-int- or cf-cloudflared-
"cf-int-sample-header",
"cf-cloudflared-sample-header",
// Any http2 pseudoheader
":sample-pseudo-header",
// content-length is a special case, it has to be there
// for some requests to work (per the HTTP2 spec)
"content-length",
}
for _, header := range controlResponseHeaders {
assert.True(t, IsH2muxControlResponseHeader(header))
}
}
func TestIsNotH2muxControlRequestHeader(t *testing.T) {
notControlRequestHeaders := []string{
"mock-header",
"another-sample-header",
}
for _, header := range notControlRequestHeaders {
assert.False(t, IsH2muxControlRequestHeader(header))
}
}
func TestIsNotH2muxControlResponseHeader(t *testing.T) {
notControlResponseHeaders := []string{
"mock-header",
"another-sample-header",
"upgrade",
"connection",
"cf-whatever", // On the response path, we only want to filter cf-int- and cf-cloudflared-
}
for _, header := range notControlResponseHeaders {
assert.False(t, IsH2muxControlResponseHeader(header))
}
}
func TestH1ResponseToH2ResponseHeaders(t *testing.T) {
mockHeaders := http.Header{
"User-header-one": {""},
"User-header-two": {"1", "2"},
"cf-header": {"cf-value"},
"cf-int-header": {"cf-int-value"},
"cf-cloudflared-header": {"cf-cloudflared-value"},
"Content-Length": {"123"},
}
mockResponse := http.Response{
StatusCode: 200,
Header: mockHeaders,
}
headers := H1ResponseToH2ResponseHeaders(mockResponse.StatusCode, mockResponse.Header)
serializedHeadersIndex := -1
for i, header := range headers {
if header.Name == ResponseUserHeaders {
serializedHeadersIndex = i
break
}
}
assert.NotEqual(t, -1, serializedHeadersIndex)
actualControlHeaders := append(
headers[:serializedHeadersIndex],
headers[serializedHeadersIndex+1:]...,
)
expectedControlHeaders := []h2mux.Header{
{Name: ":status", Value: "200"},
{Name: "content-length", Value: "123"},
}
assert.ElementsMatch(t, expectedControlHeaders, actualControlHeaders)
actualUserHeaders, err := DeserializeHeaders(headers[serializedHeadersIndex].Value)
expectedUserHeaders := []h2mux.Header{
{Name: "User-header-one", Value: ""},
{Name: "User-header-two", Value: "1"},
{Name: "User-header-two", Value: "2"},
{Name: "cf-header", Value: "cf-value"},
}
assert.NoError(t, err)
assert.ElementsMatch(t, expectedUserHeaders, actualUserHeaders)
}
// The purpose of this test is to check that our code and the http.Header
// implementation don't throw validation errors about header size
func TestHeaderSize(t *testing.T) {
largeValue := randSeq(5 * 1024 * 1024) // 5Mb
largeHeaders := http.Header{
"User-header": {largeValue},
}
mockResponse := http.Response{
StatusCode: 200,
Header: largeHeaders,
}
serializedHeaders := H1ResponseToH2ResponseHeaders(mockResponse.StatusCode, mockResponse.Header)
request, err := http.NewRequest(http.MethodGet, "https://example.com/", nil)
assert.NoError(t, err)
for _, header := range serializedHeaders {
request.Header.Set(header.Name, header.Value)
}
for _, header := range serializedHeaders {
if header.Name != ResponseUserHeaders {
continue
}
deserializedHeaders, err := DeserializeHeaders(header.Value)
assert.NoError(t, err)
assert.Equal(t, largeValue, deserializedHeaders[0].Value)
}
}
func randSeq(n int) string {
randomizer := rand.New(rand.NewSource(17))
var letters = []rune(":;,+/=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
b := make([]rune, n)
for i := range b {
b[i] = letters[randomizer.Intn(len(letters))]
}
return string(b)
}
func BenchmarkH1ResponseToH2ResponseHeaders(b *testing.B) {
ser := "eC1mb3J3YXJkZWQtcHJvdG8:aHR0cHM;dXBncmFkZS1pbnNlY3VyZS1yZXF1ZXN0cw:MQ;YWNjZXB0LWxhbmd1YWdl:ZW4tVVMsZW47cT0wLjkscnU7cT0wLjg;YWNjZXB0LWVuY29kaW5n:Z3ppcA;eC1mb3J3YXJkZWQtZm9y:MTczLjI0NS42MC42;dXNlci1hZ2VudA:TW96aWxsYS81LjAgKE1hY2ludG9zaDsgSW50ZWwgTWFjIE9TIFggMTBfMTRfNikgQXBwbGVXZWJLaXQvNTM3LjM2IChLSFRNTCwgbGlrZSBHZWNrbykgQ2hyb21lLzg0LjAuNDE0Ny44OSBTYWZhcmkvNTM3LjM2;c2VjLWZldGNoLW1vZGU:bmF2aWdhdGU;Y2RuLWxvb3A:Y2xvdWRmbGFyZQ;c2VjLWZldGNoLWRlc3Q:ZG9jdW1lbnQ;c2VjLWZldGNoLXVzZXI:PzE;c2VjLWZldGNoLXNpdGU:bm9uZQ;Y29va2ll:X19jZmR1aWQ9ZGNkOWZjOGNjNWMxMzE0NTMyYTFkMjhlZDEyOWRhOTYwMTU2OTk1MTYzNDsgX19jZl9ibT1mYzY2MzMzYzAzZmM0MWFiZTZmOWEyYzI2ZDUwOTA0YzIxYzZhMTQ2LTE1OTU2MjIzNDEtMTgwMC1BZTVzS2pIU2NiWGVFM05mMUhrTlNQMG1tMHBLc2pQWkloVnM1Z2g1SkNHQkFhS1UxVDB2b003alBGN3FjMHVSR2NjZGcrWHdhL1EzbTJhQzdDVU4xZ2M9;YWNjZXB0:dGV4dC9odG1sLGFwcGxpY2F0aW9uL3hodG1sK3htbCxhcHBsaWNhdGlvbi94bWw7cT0wLjksaW1hZ2Uvd2VicCxpbWFnZS9hcG5nLCovKjtxPTAuOCxhcHBsaWNhdGlvbi9zaWduZWQtZXhjaGFuZ2U7dj1iMztxPTAuOQ"
h2, _ := DeserializeHeaders(ser)
h1 := make(http.Header)
for _, header := range h2 {
h1.Add(header.Name, header.Value)
}
h1.Add("Content-Length", "200")
h1.Add("Cf-Something", "Else")
h1.Add("Upgrade", "websocket")
h1resp := &http.Response{
StatusCode: 200,
Header: h1,
}
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_ = H1ResponseToH2ResponseHeaders(h1resp.StatusCode, h1resp.Header)
}
}