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Move httputils/reasumablerequestreader to the single consumer. 

Signed-off-by: Daniel Nephin <dnephin@docker.com>
This commit is contained in:
Daniel Nephin 2017-06-01 15:59:24 -04:00
parent c91521be68
commit 65515af075
3 changed files with 53 additions and 106 deletions
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24
pkg/httputils/resumablerequestreader.go → registry/resumable/resumablerequestreader.go
View File

@ -1,4 +1,4 @@
package httputils
package resumable
import (
"fmt"
@ -9,7 +9,7 @@ import (
"github.com/Sirupsen/logrus"
)
type resumableRequestReader struct {
type requestReader struct {
client *http.Client
request *http.Request
lastRange int64
@ -20,22 +20,22 @@ type resumableRequestReader struct {
waitDuration time.Duration
}
// ResumableRequestReader makes it possible to resume reading a request's body transparently
// NewRequestReader makes it possible to resume reading a request's body transparently
// maxfail is the number of times we retry to make requests again (not resumes)
// totalsize is the total length of the body; auto detect if not provided
func ResumableRequestReader(c *http.Client, r *http.Request, maxfail uint32, totalsize int64) io.ReadCloser {
return &resumableRequestReader{client: c, request: r, maxFailures: maxfail, totalSize: totalsize, waitDuration: 5 * time.Second}
func NewRequestReader(c *http.Client, r *http.Request, maxfail uint32, totalsize int64) io.ReadCloser {
return &requestReader{client: c, request: r, maxFailures: maxfail, totalSize: totalsize, waitDuration: 5 * time.Second}
}
// ResumableRequestReaderWithInitialResponse makes it possible to resume
// NewRequestReaderWithInitialResponse makes it possible to resume
// reading the body of an already initiated request.
func ResumableRequestReaderWithInitialResponse(c *http.Client, r *http.Request, maxfail uint32, totalsize int64, initialResponse *http.Response) io.ReadCloser {
return &resumableRequestReader{client: c, request: r, maxFailures: maxfail, totalSize: totalsize, currentResponse: initialResponse, waitDuration: 5 * time.Second}
func NewRequestReaderWithInitialResponse(c *http.Client, r *http.Request, maxfail uint32, totalsize int64, initialResponse *http.Response) io.ReadCloser {
return &requestReader{client: c, request: r, maxFailures: maxfail, totalSize: totalsize, currentResponse: initialResponse, waitDuration: 5 * time.Second}
}
func (r *resumableRequestReader) Read(p []byte) (n int, err error) {
func (r *requestReader) Read(p []byte) (n int, err error) {
if r.client == nil || r.request == nil {
return 0, fmt.Errorf("client and request can't be nil\n")
return 0, fmt.Errorf("client and request can't be nil")
}
isFreshRequest := false
if r.lastRange != 0 && r.currentResponse == nil {
@ -81,14 +81,14 @@ func (r *resumableRequestReader) Read(p []byte) (n int, err error) {
return n, err
}
func (r *resumableRequestReader) Close() error {
func (r *requestReader) Close() error {
r.cleanUpResponse()
r.client = nil
r.request = nil
return nil
}
func (r *resumableRequestReader) cleanUpResponse() {
func (r *requestReader) cleanUpResponse() {
if r.currentResponse != nil {
r.currentResponse.Body.Close()
r.currentResponse = nil

132
pkg/httputils/resumablerequestreader_test.go → registry/resumable/resumablerequestreader_test.go
View File

@ -1,7 +1,9 @@
package httputils
package resumable
import (
"fmt"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"io"
"io/ioutil"
"net/http"
@ -21,28 +23,19 @@ func TestResumableRequestHeaderSimpleErrors(t *testing.T) {
var req *http.Request
req, err := http.NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
expectedError := "client and request can't be nil\n"
resreq := &resumableRequestReader{}
resreq := &requestReader{}
_, err = resreq.Read([]byte{})
if err == nil || err.Error() != expectedError {
t.Fatalf("Expected an error with '%s', got %v.", expectedError, err)
}
assert.EqualError(t, err, "client and request can't be nil")
resreq = &resumableRequestReader{
resreq = &requestReader{
client: client,
request: req,
totalSize: -1,
}
expectedError = "failed to auto detect content length"
_, err = resreq.Read([]byte{})
if err == nil || err.Error() != expectedError {
t.Fatalf("Expected an error with '%s', got %v.", expectedError, err)
}
assert.EqualError(t, err, "failed to auto detect content length")
}
// Not too much failures, bails out after some wait
@ -51,11 +44,9 @@ func TestResumableRequestHeaderNotTooMuchFailures(t *testing.T) {
var badReq *http.Request
badReq, err := http.NewRequest("GET", "I'm not an url", nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
resreq := &resumableRequestReader{
resreq := &requestReader{
client: client,
request: badReq,
failures: 0,
@ -63,9 +54,8 @@ func TestResumableRequestHeaderNotTooMuchFailures(t *testing.T) {
waitDuration: 10 * time.Millisecond,
}
read, err := resreq.Read([]byte{})
if err != nil || read != 0 {
t.Fatalf("Expected no error and no byte read, got err:%v, read:%v.", err, read)
}
require.NoError(t, err)
assert.Equal(t, 0, read)
}
// Too much failures, returns the error
@ -74,11 +64,9 @@ func TestResumableRequestHeaderTooMuchFailures(t *testing.T) {
var badReq *http.Request
badReq, err := http.NewRequest("GET", "I'm not an url", nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
resreq := &resumableRequestReader{
resreq := &requestReader{
client: client,
request: badReq,
failures: 0,
@ -88,9 +76,8 @@ func TestResumableRequestHeaderTooMuchFailures(t *testing.T) {
expectedError := `Get I%27m%20not%20an%20url: unsupported protocol scheme ""`
read, err := resreq.Read([]byte{})
if err == nil || err.Error() != expectedError || read != 0 {
t.Fatalf("Expected the error '%s', got err:%v, read:%v.", expectedError, err, read)
}
assert.EqualError(t, err, expectedError)
assert.Equal(t, 0, read)
}
type errorReaderCloser struct{}
@ -105,9 +92,7 @@ func (errorReaderCloser) Read(p []byte) (n int, err error) {
func TestResumableRequestReaderWithReadError(t *testing.T) {
var req *http.Request
req, err := http.NewRequest("GET", "", nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
client := &http.Client{}
@ -119,7 +104,7 @@ func TestResumableRequestReaderWithReadError(t *testing.T) {
Body: errorReaderCloser{},
}
resreq := &resumableRequestReader{
resreq := &requestReader{
client: client,
request: req,
currentResponse: response,
@ -130,21 +115,15 @@ func TestResumableRequestReaderWithReadError(t *testing.T) {
buf := make([]byte, 1)
read, err := resreq.Read(buf)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
if read != 0 {
t.Fatalf("Expected to have read nothing, but read %v", read)
}
assert.Equal(t, 0, read)
}
func TestResumableRequestReaderWithEOFWith416Response(t *testing.T) {
var req *http.Request
req, err := http.NewRequest("GET", "", nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
client := &http.Client{}
@ -156,7 +135,7 @@ func TestResumableRequestReaderWithEOFWith416Response(t *testing.T) {
Body: ioutil.NopCloser(strings.NewReader("")),
}
resreq := &resumableRequestReader{
resreq := &requestReader{
client: client,
request: req,
currentResponse: response,
@ -167,9 +146,7 @@ func TestResumableRequestReaderWithEOFWith416Response(t *testing.T) {
buf := make([]byte, 1)
_, err = resreq.Read(buf)
if err == nil || err != io.EOF {
t.Fatalf("Expected an io.EOF error, got %v", err)
}
assert.EqualError(t, err, io.EOF.Error())
}
func TestResumableRequestReaderWithServerDoesntSupportByteRanges(t *testing.T) {
@ -182,29 +159,23 @@ func TestResumableRequestReaderWithServerDoesntSupportByteRanges(t *testing.T) {
var req *http.Request
req, err := http.NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
client := &http.Client{}
resreq := &resumableRequestReader{
resreq := &requestReader{
client: client,
request: req,
lastRange: 1,
}
defer resreq.Close()
expectedError := "the server doesn't support byte ranges"
buf := make([]byte, 2)
_, err = resreq.Read(buf)
if err == nil || err.Error() != expectedError {
t.Fatalf("Expected an error '%s', got %v", expectedError, err)
}
assert.EqualError(t, err, "the server doesn't support byte ranges")
}
func TestResumableRequestReaderWithZeroTotalSize(t *testing.T) {
srvtxt := "some response text data"
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@ -214,30 +185,22 @@ func TestResumableRequestReaderWithZeroTotalSize(t *testing.T) {
var req *http.Request
req, err := http.NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
client := &http.Client{}
retries := uint32(5)
resreq := ResumableRequestReader(client, req, retries, 0)
resreq := NewRequestReader(client, req, retries, 0)
defer resreq.Close()
data, err := ioutil.ReadAll(resreq)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
resstr := strings.TrimSuffix(string(data), "\n")
if resstr != srvtxt {
t.Error("resstr != srvtxt")
}
assert.Equal(t, srvtxt, resstr)
}
func TestResumableRequestReader(t *testing.T) {
srvtxt := "some response text data"
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@ -247,31 +210,23 @@ func TestResumableRequestReader(t *testing.T) {
var req *http.Request
req, err := http.NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
client := &http.Client{}
retries := uint32(5)
imgSize := int64(len(srvtxt))
resreq := ResumableRequestReader(client, req, retries, imgSize)
resreq := NewRequestReader(client, req, retries, imgSize)
defer resreq.Close()
data, err := ioutil.ReadAll(resreq)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
resstr := strings.TrimSuffix(string(data), "\n")
if resstr != srvtxt {
t.Error("resstr != srvtxt")
}
assert.Equal(t, srvtxt, resstr)
}
func TestResumableRequestReaderWithInitialResponse(t *testing.T) {
srvtxt := "some response text data"
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@ -281,30 +236,21 @@ func TestResumableRequestReaderWithInitialResponse(t *testing.T) {
var req *http.Request
req, err := http.NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
client := &http.Client{}
retries := uint32(5)
imgSize := int64(len(srvtxt))
res, err := client.Do(req)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
resreq := ResumableRequestReaderWithInitialResponse(client, req, retries, imgSize, res)
resreq := NewRequestReaderWithInitialResponse(client, req, retries, imgSize, res)
defer resreq.Close()
data, err := ioutil.ReadAll(resreq)
if err != nil {
t.Fatal(err)
}
require.NoError(t, err)
resstr := strings.TrimSuffix(string(data), "\n")
if resstr != srvtxt {
t.Error("resstr != srvtxt")
}
assert.Equal(t, srvtxt, resstr)
}

3
registry/session.go
View File

@ -27,6 +27,7 @@ import (
"github.com/docker/docker/pkg/ioutils"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/tarsum"
"github.com/docker/docker/registry/resumable"
)
var (
@ -313,7 +314,7 @@ func (r *Session) GetRemoteImageLayer(imgID, registry string, imgSize int64) (io
if res.Header.Get("Accept-Ranges") == "bytes" && imgSize > 0 {
logrus.Debug("server supports resume")
return httputils.ResumableRequestReaderWithInitialResponse(r.client, req, 5, imgSize, res), nil
return resumable.NewRequestReaderWithInitialResponse(r.client, req, 5, imgSize, res), nil
}
logrus.Debug("server doesn't support resume")
return res.Body, nil