674 lines
15 KiB
Go
674 lines
15 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tsweb
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import (
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"bufio"
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"context"
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"errors"
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"expvar"
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"fmt"
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"io"
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"net"
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"net/http"
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"net/http/httptest"
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"strings"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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"tailscale.com/metrics"
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"tailscale.com/tstest"
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)
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type noopHijacker struct {
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*httptest.ResponseRecorder
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hijacked bool
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}
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func (h *noopHijacker) Hijack() (net.Conn, *bufio.ReadWriter, error) {
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// Hijack "successfully" but don't bother returning a conn.
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h.hijacked = true
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return nil, nil, nil
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}
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type handlerFunc func(http.ResponseWriter, *http.Request) error
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func (f handlerFunc) ServeHTTPReturn(w http.ResponseWriter, r *http.Request) error {
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return f(w, r)
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}
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func TestStdHandler(t *testing.T) {
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var (
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handlerCode = func(code int) ReturnHandler {
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return handlerFunc(func(w http.ResponseWriter, r *http.Request) error {
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w.WriteHeader(code)
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return nil
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})
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}
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handlerErr = func(code int, err error) ReturnHandler {
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return handlerFunc(func(w http.ResponseWriter, r *http.Request) error {
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if code != 0 {
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w.WriteHeader(code)
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}
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return err
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})
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}
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req = func(ctx context.Context, url string) *http.Request {
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ret, err := http.NewRequestWithContext(ctx, "GET", url, nil)
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if err != nil {
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panic(err)
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}
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return ret
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}
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testErr = errors.New("test error")
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bgCtx = context.Background()
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// canceledCtx, cancel = context.WithCancel(bgCtx)
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clock = tstest.Clock{
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Start: time.Now(),
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Step: time.Second,
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}
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)
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// cancel()
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tests := []struct {
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name string
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rh ReturnHandler
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r *http.Request
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errHandler ErrorHandlerFunc
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wantCode int
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wantLog AccessLogRecord
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}{
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{
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name: "handler returns 200",
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rh: handlerCode(200),
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r: req(bgCtx, "http://example.com/"),
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wantCode: 200,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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TLS: false,
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Host: "example.com",
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Method: "GET",
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Code: 200,
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RequestURI: "/",
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},
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},
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{
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name: "handler returns 404",
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rh: handlerCode(404),
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r: req(bgCtx, "http://example.com/foo"),
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wantCode: 404,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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Host: "example.com",
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Method: "GET",
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RequestURI: "/foo",
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Code: 404,
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},
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},
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{
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name: "handler returns 404 via HTTPError",
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rh: handlerErr(0, Error(404, "not found", testErr)),
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r: req(bgCtx, "http://example.com/foo"),
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wantCode: 404,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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Host: "example.com",
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Method: "GET",
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RequestURI: "/foo",
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Err: "not found: " + testErr.Error(),
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Code: 404,
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},
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},
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{
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name: "handler returns 404 with nil child error",
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rh: handlerErr(0, Error(404, "not found", nil)),
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r: req(bgCtx, "http://example.com/foo"),
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wantCode: 404,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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Host: "example.com",
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Method: "GET",
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RequestURI: "/foo",
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Err: "not found",
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Code: 404,
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},
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},
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{
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name: "handler returns generic error",
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rh: handlerErr(0, testErr),
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r: req(bgCtx, "http://example.com/foo"),
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wantCode: 500,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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Host: "example.com",
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Method: "GET",
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RequestURI: "/foo",
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Err: testErr.Error(),
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Code: 500,
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},
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},
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{
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name: "handler returns error after writing response",
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rh: handlerErr(200, testErr),
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r: req(bgCtx, "http://example.com/foo"),
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wantCode: 200,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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Host: "example.com",
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Method: "GET",
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RequestURI: "/foo",
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Err: testErr.Error(),
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Code: 200,
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},
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},
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{
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name: "handler returns HTTPError after writing response",
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rh: handlerErr(200, Error(404, "not found", testErr)),
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r: req(bgCtx, "http://example.com/foo"),
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wantCode: 200,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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Host: "example.com",
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Method: "GET",
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RequestURI: "/foo",
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Err: "not found: " + testErr.Error(),
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Code: 200,
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},
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},
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{
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name: "handler does nothing",
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rh: handlerFunc(func(http.ResponseWriter, *http.Request) error { return nil }),
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r: req(bgCtx, "http://example.com/foo"),
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wantCode: 200,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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Host: "example.com",
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Method: "GET",
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RequestURI: "/foo",
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Code: 200,
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},
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},
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{
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name: "handler hijacks conn",
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rh: handlerFunc(func(w http.ResponseWriter, r *http.Request) error {
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_, _, err := w.(http.Hijacker).Hijack()
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if err != nil {
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t.Errorf("couldn't hijack: %v", err)
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}
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return err
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}),
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r: req(bgCtx, "http://example.com/foo"),
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wantCode: 200,
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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Host: "example.com",
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Method: "GET",
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RequestURI: "/foo",
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Code: 101,
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},
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},
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{
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name: "error handler gets run",
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rh: handlerErr(0, Error(404, "not found", nil)), // status code changed in errHandler
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r: req(bgCtx, "http://example.com/"),
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wantCode: 200,
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errHandler: func(w http.ResponseWriter, r *http.Request, e HTTPError) {
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http.Error(w, e.Msg, 200)
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},
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wantLog: AccessLogRecord{
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When: clock.Start,
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Seconds: 1.0,
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Proto: "HTTP/1.1",
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TLS: false,
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Host: "example.com",
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Method: "GET",
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Code: 404,
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Err: "not found",
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RequestURI: "/",
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},
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},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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var logs []AccessLogRecord
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logf := func(fmt string, args ...any) {
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if fmt == "%s" {
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logs = append(logs, args[0].(AccessLogRecord))
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}
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t.Logf(fmt, args...)
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}
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clock.Reset()
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rec := noopHijacker{httptest.NewRecorder(), false}
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h := StdHandler(test.rh, HandlerOptions{Logf: logf, Now: clock.Now, OnError: test.errHandler})
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h.ServeHTTP(&rec, test.r)
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res := rec.Result()
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if res.StatusCode != test.wantCode {
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t.Errorf("HTTP code = %v, want %v", res.StatusCode, test.wantCode)
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}
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if len(logs) != 1 {
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t.Errorf("handler didn't write a request log")
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return
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}
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errTransform := cmp.Transformer("err", func(e error) string {
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if e == nil {
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return ""
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}
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return e.Error()
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})
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if diff := cmp.Diff(logs[0], test.wantLog, errTransform); diff != "" {
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t.Errorf("handler wrote incorrect request log (-got+want):\n%s", diff)
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}
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})
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}
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}
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func BenchmarkLogNot200(b *testing.B) {
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b.ReportAllocs()
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rh := handlerFunc(func(w http.ResponseWriter, r *http.Request) error {
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// Implicit 200 OK.
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return nil
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})
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h := StdHandler(rh, HandlerOptions{Quiet200s: true})
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req := httptest.NewRequest("GET", "/", nil)
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rw := new(httptest.ResponseRecorder)
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for i := 0; i < b.N; i++ {
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*rw = httptest.ResponseRecorder{}
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h.ServeHTTP(rw, req)
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}
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}
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func BenchmarkLog(b *testing.B) {
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b.ReportAllocs()
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rh := handlerFunc(func(w http.ResponseWriter, r *http.Request) error {
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// Implicit 200 OK.
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return nil
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})
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h := StdHandler(rh, HandlerOptions{})
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req := httptest.NewRequest("GET", "/", nil)
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rw := new(httptest.ResponseRecorder)
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for i := 0; i < b.N; i++ {
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*rw = httptest.ResponseRecorder{}
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h.ServeHTTP(rw, req)
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}
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}
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func TestVarzHandler(t *testing.T) {
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t.Run("globals_log", func(t *testing.T) {
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rec := httptest.NewRecorder()
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VarzHandler(rec, httptest.NewRequest("GET", "/", nil))
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t.Logf("Got: %s", rec.Body.Bytes())
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})
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half := new(expvar.Float)
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half.Set(0.5)
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tests := []struct {
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name string
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k string // key name
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v expvar.Var
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want string
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}{
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{
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"int",
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"foo",
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new(expvar.Int),
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"# TYPE foo counter\nfoo 0\n",
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},
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{
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"int_with_type_counter",
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"counter_foo",
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new(expvar.Int),
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"# TYPE foo counter\nfoo 0\n",
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},
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{
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"int_with_type_gauge",
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"gauge_foo",
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new(expvar.Int),
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"# TYPE foo gauge\nfoo 0\n",
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},
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{
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// For a float = 0.0, Prometheus client_golang outputs "0"
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"float_zero",
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"foo",
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new(expvar.Float),
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"# TYPE foo gauge\nfoo 0\n",
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},
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{
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"float_point_5",
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"foo",
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half,
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"# TYPE foo gauge\nfoo 0.5\n",
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},
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{
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"float_with_type_counter",
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"counter_foo",
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half,
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"# TYPE foo counter\nfoo 0.5\n",
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},
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{
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"float_with_type_gauge",
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"gauge_foo",
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half,
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"# TYPE foo gauge\nfoo 0.5\n",
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},
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{
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"metrics_set",
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"s",
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&metrics.Set{
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Map: *(func() *expvar.Map {
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m := new(expvar.Map)
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m.Init()
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m.Add("foo", 1)
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m.Add("bar", 2)
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return m
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})(),
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},
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"# TYPE s_bar counter\ns_bar 2\n# TYPE s_foo counter\ns_foo 1\n",
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},
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{
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"metrics_set_TODO_gauge_type",
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"gauge_s", // TODO(bradfitz): arguably a bug; should pass down type
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&metrics.Set{
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Map: *(func() *expvar.Map {
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m := new(expvar.Map)
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m.Init()
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m.Add("foo", 1)
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m.Add("bar", 2)
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return m
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})(),
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},
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"# TYPE s_bar counter\ns_bar 2\n# TYPE s_foo counter\ns_foo 1\n",
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},
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{
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"expvar_map_untyped",
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"api_status_code",
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func() *expvar.Map {
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m := new(expvar.Map)
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m.Init()
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m.Add("2xx", 100)
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m.Add("5xx", 2)
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return m
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}(),
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"api_status_code_2xx 100\napi_status_code_5xx 2\n",
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},
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{
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"func_float64",
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"counter_x",
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expvar.Func(func() any { return float64(1.2) }),
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"# TYPE x counter\nx 1.2\n",
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},
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{
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"func_float64_gauge",
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"gauge_x",
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expvar.Func(func() any { return float64(1.2) }),
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"# TYPE x gauge\nx 1.2\n",
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},
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{
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"func_float64_untyped",
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"x",
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expvar.Func(func() any { return float64(1.2) }),
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"x 1.2\n",
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},
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{
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"metrics_label_map",
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"counter_m",
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&metrics.LabelMap{
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Label: "label",
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Map: *(func() *expvar.Map {
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m := new(expvar.Map)
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m.Init()
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m.Add("foo", 1)
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m.Add("bar", 2)
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return m
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})(),
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},
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"# TYPE m counter\nm{label=\"bar\"} 2\nm{label=\"foo\"} 1\n",
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},
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{
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"metrics_label_map_untyped",
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"control_save_config",
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(func() *metrics.LabelMap {
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m := &metrics.LabelMap{Label: "reason"}
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m.Add("new", 1)
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m.Add("updated", 1)
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m.Add("fun", 1)
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return m
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})(),
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"control_save_config{reason=\"fun\"} 1\ncontrol_save_config{reason=\"new\"} 1\ncontrol_save_config{reason=\"updated\"} 1\n",
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},
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{
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"expvar_label_map",
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"counter_labelmap_keyname_m",
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func() *expvar.Map {
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m := new(expvar.Map)
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m.Init()
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m.Add("foo", 1)
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m.Add("bar", 2)
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return m
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}(),
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"# TYPE m counter\nm{keyname=\"bar\"} 2\nm{keyname=\"foo\"} 1\n",
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},
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{
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"struct_reflect",
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"foo",
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someExpVarWithJSONAndPromTypes(),
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strings.TrimSpace(`
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# TYPE foo_nestvalue_foo gauge
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foo_nestvalue_foo 1
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# TYPE foo_nestvalue_bar counter
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foo_nestvalue_bar 2
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# TYPE foo_nestptr_foo gauge
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foo_nestptr_foo 10
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# TYPE foo_nestptr_bar counter
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foo_nestptr_bar 20
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# TYPE foo_curX gauge
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foo_curX 3
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# TYPE foo_totalY counter
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foo_totalY 4
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# TYPE foo_curTemp gauge
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foo_curTemp 20.6
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# TYPE foo_AnInt8 counter
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foo_AnInt8 127
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# TYPE foo_AUint16 counter
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foo_AUint16 65535
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`) + "\n",
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},
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{
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"struct_reflect_nil_root",
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"foo",
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expvarAdapter{(*SomeStats)(nil)},
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"",
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},
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{
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"func_returning_int",
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"num_goroutines",
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expvar.Func(func() any { return 123 }),
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"num_goroutines 123\n",
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},
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{
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"var_that_exports_itself",
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"custom_var",
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promWriter{},
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"custom_var_value 42\n",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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defer func() { expvarDo = expvar.Do }()
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expvarDo = func(f func(expvar.KeyValue)) {
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f(expvar.KeyValue{Key: tt.k, Value: tt.v})
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}
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rec := httptest.NewRecorder()
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VarzHandler(rec, httptest.NewRequest("GET", "/", nil))
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if got := rec.Body.Bytes(); string(got) != tt.want {
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t.Errorf("mismatch\n got: %q\n%s\nwant: %q\n%s\n", got, got, tt.want, tt.want)
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}
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})
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}
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}
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type SomeNested struct {
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FooG int64 `json:"foo" metrictype:"gauge"`
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BarC int64 `json:"bar" metrictype:"counter"`
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Omit int `json:"-" metrictype:"counter"`
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}
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|
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type SomeStats struct {
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Nested SomeNested `json:"nestvalue"`
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|
NestedPtr *SomeNested `json:"nestptr"`
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NestedNilPtr *SomeNested `json:"nestnilptr"`
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CurX int `json:"curX" metrictype:"gauge"`
|
|
NoMetricType int `json:"noMetric" metrictype:""`
|
|
TotalY int64 `json:"totalY,omitempty" metrictype:"counter"`
|
|
CurTemp float64 `json:"curTemp" metrictype:"gauge"`
|
|
AnInt8 int8 `metrictype:"counter"`
|
|
AUint16 uint16 `metrictype:"counter"`
|
|
}
|
|
|
|
// someExpVarWithJSONAndPromTypes returns an expvar.Var that
|
|
// implements PrometheusMetricsReflectRooter for TestVarzHandler.
|
|
func someExpVarWithJSONAndPromTypes() expvar.Var {
|
|
st := &SomeStats{
|
|
Nested: SomeNested{
|
|
FooG: 1,
|
|
BarC: 2,
|
|
Omit: 3,
|
|
},
|
|
NestedPtr: &SomeNested{
|
|
FooG: 10,
|
|
BarC: 20,
|
|
},
|
|
CurX: 3,
|
|
TotalY: 4,
|
|
CurTemp: 20.6,
|
|
AnInt8: 127,
|
|
AUint16: 65535,
|
|
}
|
|
return expvarAdapter{st}
|
|
}
|
|
|
|
type expvarAdapter struct {
|
|
st *SomeStats
|
|
}
|
|
|
|
func (expvarAdapter) String() string { return "{}" } // expvar JSON; unused in test
|
|
|
|
func (a expvarAdapter) PrometheusMetricsReflectRoot() any {
|
|
return a.st
|
|
}
|
|
|
|
type promWriter struct{}
|
|
|
|
func (promWriter) WritePrometheus(w io.Writer, prefix string) {
|
|
fmt.Fprintf(w, "%s_value 42\n", prefix)
|
|
}
|
|
|
|
func (promWriter) String() string {
|
|
return ""
|
|
}
|
|
|
|
func TestAcceptsEncoding(t *testing.T) {
|
|
tests := []struct {
|
|
in, enc string
|
|
want bool
|
|
}{
|
|
{"", "gzip", false},
|
|
{"gzip", "gzip", true},
|
|
{"foo,gzip", "gzip", true},
|
|
{"foo, gzip", "gzip", true},
|
|
{"foo, gzip ", "gzip", true},
|
|
{"gzip, foo ", "gzip", true},
|
|
{"gzip, foo ", "br", false},
|
|
{"gzip, foo ", "fo", false},
|
|
{"gzip;q=1.2, foo ", "gzip", true},
|
|
{" gzip;q=1.2, foo ", "gzip", true},
|
|
}
|
|
for i, tt := range tests {
|
|
h := make(http.Header)
|
|
if tt.in != "" {
|
|
h.Set("Accept-Encoding", tt.in)
|
|
}
|
|
got := AcceptsEncoding(&http.Request{Header: h}, tt.enc)
|
|
if got != tt.want {
|
|
t.Errorf("%d. got %v; want %v", i, got, tt.want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestPort80Handler(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
h *Port80Handler
|
|
req string
|
|
wantLoc string
|
|
}{
|
|
{
|
|
name: "no_fqdn",
|
|
h: &Port80Handler{},
|
|
req: "GET / HTTP/1.1\r\nHost: foo.com\r\n\r\n",
|
|
wantLoc: "https://foo.com/",
|
|
},
|
|
{
|
|
name: "fqdn_and_path",
|
|
h: &Port80Handler{FQDN: "bar.com"},
|
|
req: "GET /path HTTP/1.1\r\nHost: foo.com\r\n\r\n",
|
|
wantLoc: "https://bar.com/path",
|
|
},
|
|
{
|
|
name: "path_and_query_string",
|
|
h: &Port80Handler{FQDN: "baz.com"},
|
|
req: "GET /path?a=b HTTP/1.1\r\nHost: foo.com\r\n\r\n",
|
|
wantLoc: "https://baz.com/path?a=b",
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
r, _ := http.ReadRequest(bufio.NewReader(strings.NewReader(tt.req)))
|
|
rec := httptest.NewRecorder()
|
|
tt.h.ServeHTTP(rec, r)
|
|
got := rec.Result()
|
|
if got, want := got.StatusCode, 302; got != want {
|
|
t.Errorf("got status code %v; want %v", got, want)
|
|
}
|
|
if got, want := got.Header.Get("Location"), "https://foo.com/"; got != tt.wantLoc {
|
|
t.Errorf("Location = %q; want %q", got, want)
|
|
}
|
|
})
|
|
}
|
|
}
|