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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package acme
import (
"context"
"fmt"
"io"
"net/http"
"net/http/httptest"
"reflect"
"strings"
"testing"
"time"
)
func TestDefaultBackoff(t *testing.T) {
tt := []struct {
nretry int
retryAfter string // Retry-After header
out time.Duration // expected min; max = min + jitter
}{
{-1, "", time.Second}, // verify the lower bound is 1
{0, "", time.Second}, // verify the lower bound is 1
{100, "", 10 * time.Second}, // verify the ceiling
{1, "3600", time.Hour}, // verify the header value is used
{1, "", 1 * time.Second},
{2, "", 2 * time.Second},
{3, "", 4 * time.Second},
{4, "", 8 * time.Second},
}
for i, test := range tt {
r := httptest.NewRequest("GET", "/", nil)
resp := &http.Response{Header: http.Header{}}
if test.retryAfter != "" {
resp.Header.Set("Retry-After", test.retryAfter)
}
d := defaultBackoff(test.nretry, r, resp)
max := test.out + time.Second // + max jitter
if d < test.out || max < d {
t.Errorf("%d: defaultBackoff(%v) = %v; want between %v and %v", i, test.nretry, d, test.out, max)
}
}
}
func TestErrorResponse(t *testing.T) {
s := `{
"status": 400,
"type": "urn:acme:error:xxx",
"detail": "text"
}`
res := &http.Response{
StatusCode: 400,
Status: "400 Bad Request",
Body: io.NopCloser(strings.NewReader(s)),
Header: http.Header{"X-Foo": {"bar"}},
}
err := responseError(res)
v, ok := err.(*Error)
if !ok {
t.Fatalf("err = %+v (%T); want *Error type", err, err)
}
if v.StatusCode != 400 {
t.Errorf("v.StatusCode = %v; want 400", v.StatusCode)
}
if v.ProblemType != "urn:acme:error:xxx" {
t.Errorf("v.ProblemType = %q; want urn:acme:error:xxx", v.ProblemType)
}
if v.Detail != "text" {
t.Errorf("v.Detail = %q; want text", v.Detail)
}
if !reflect.DeepEqual(v.Header, res.Header) {
t.Errorf("v.Header = %+v; want %+v", v.Header, res.Header)
}
}
func TestPostWithRetries(t *testing.T) {
var count int
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
count++
w.Header().Set("Replay-Nonce", fmt.Sprintf("nonce%d", count))
if r.Method == "HEAD" {
// We expect the client to do 2 head requests to fetch
// nonces, one to start and another after getting badNonce
return
}
head, err := decodeJWSHead(r.Body)
switch {
case err != nil:
t.Errorf("decodeJWSHead: %v", err)
case head.Nonce == "":
t.Error("head.Nonce is empty")
case head.Nonce == "nonce1":
// Return a badNonce error to force the call to retry.
w.Header().Set("Retry-After", "0")
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{"type":"urn:ietf:params:acme:error:badNonce"}`))
return
}
// Make client.Authorize happy; we're not testing its result.
w.WriteHeader(http.StatusCreated)
w.Write([]byte(`{"status":"valid"}`))
}))
defer ts.Close()
client := &Client{
Key: testKey,
DirectoryURL: ts.URL,
dir: &Directory{AuthzURL: ts.URL},
}
// This call will fail with badNonce, causing a retry
if _, err := client.Authorize(context.Background(), "example.com"); err != nil {
t.Errorf("client.Authorize 1: %v", err)
}
if count != 3 {
t.Errorf("total requests count: %d; want 3", count)
}
}
func TestRetryErrorType(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Replay-Nonce", "nonce")
w.WriteHeader(http.StatusTooManyRequests)
w.Write([]byte(`{"type":"rateLimited"}`))
}))
defer ts.Close()
client := &Client{
Key: testKey,
RetryBackoff: func(n int, r *http.Request, res *http.Response) time.Duration {
// Do no retries.
return 0
},
dir: &Directory{AuthzURL: ts.URL},
}
t.Run("post", func(t *testing.T) {
testRetryErrorType(t, func() error {
_, err := client.Authorize(context.Background(), "example.com")
return err
})
})
t.Run("get", func(t *testing.T) {
testRetryErrorType(t, func() error {
_, err := client.GetAuthorization(context.Background(), ts.URL)
return err
})
})
}
func testRetryErrorType(t *testing.T, callClient func() error) {
t.Helper()
err := callClient()
if err == nil {
t.Fatal("client.Authorize returned nil error")
}
acmeErr, ok := err.(*Error)
if !ok {
t.Fatalf("err is %v (%T); want *Error", err, err)
}
if acmeErr.StatusCode != http.StatusTooManyRequests {
t.Errorf("acmeErr.StatusCode = %d; want %d", acmeErr.StatusCode, http.StatusTooManyRequests)
}
if acmeErr.ProblemType != "rateLimited" {
t.Errorf("acmeErr.ProblemType = %q; want 'rateLimited'", acmeErr.ProblemType)
}
}
func TestRetryBackoffArgs(t *testing.T) {
const resCode = http.StatusInternalServerError
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Replay-Nonce", "test-nonce")
w.WriteHeader(resCode)
}))
defer ts.Close()
// Canceled in backoff.
ctx, cancel := context.WithCancel(context.Background())
var nretry int
backoff := func(n int, r *http.Request, res *http.Response) time.Duration {
nretry++
if n != nretry {
t.Errorf("n = %d; want %d", n, nretry)
}
if nretry == 3 {
cancel()
}
if r == nil {
t.Error("r is nil")
}
if res.StatusCode != resCode {
t.Errorf("res.StatusCode = %d; want %d", res.StatusCode, resCode)
}
return time.Millisecond
}
client := &Client{
Key: testKey,
RetryBackoff: backoff,
dir: &Directory{AuthzURL: ts.URL},
}
if _, err := client.Authorize(ctx, "example.com"); err == nil {
t.Error("err is nil")
}
if nretry != 3 {
t.Errorf("nretry = %d; want 3", nretry)
}
}
func TestUserAgent(t *testing.T) {
for _, custom := range []string{"", "CUSTOM_UA"} {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
t.Log(r.UserAgent())
if s := "golang.org/x/crypto/acme"; !strings.Contains(r.UserAgent(), s) {
t.Errorf("expected User-Agent to contain %q, got %q", s, r.UserAgent())
}
if !strings.Contains(r.UserAgent(), custom) {
t.Errorf("expected User-Agent to contain %q, got %q", custom, r.UserAgent())
}
w.WriteHeader(http.StatusOK)
w.Write([]byte(`{"newOrder": "sure"}`))
}))
defer ts.Close()
client := &Client{
Key: testKey,
DirectoryURL: ts.URL,
UserAgent: custom,
}
if _, err := client.Discover(context.Background()); err != nil {
t.Errorf("client.Discover: %v", err)
}
}
}
func TestAccountKidLoop(t *testing.T) {
// if Client.postNoRetry is called with a nil key argument
// then Client.Key must be set, otherwise we fall into an
// infinite loop (which also causes a deadlock).
client := &Client{dir: &Directory{OrderURL: ":)"}}
_, _, err := client.postNoRetry(context.Background(), nil, "", nil)
if err == nil {
t.Fatal("Client.postNoRetry didn't fail with a nil key")
}
expected := "acme: Client.Key must be populated to make POST requests"
if err.Error() != expected {
t.Fatalf("Unexpected error returned: wanted %q, got %q", expected, err.Error())
}
}