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cloudreve
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feat(OneDrive): support `Retry-After` throttling control from Graph API (#280)

Browse Source
pull/1519/head
HFO4 2 years ago
parent 8494bd6eb9
commit 392c824a33
6 changed files with 148 additions and 27 deletions
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53
pkg/filesystem/chunk/backoff/backoff.go
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@ -1,14 +1,22 @@
package backoff
import "time"
import (
"errors"
"fmt"
"github.com/cloudreve/Cloudreve/v3/pkg/util"
"net/http"
"strconv"
"time"
)
// Backoff used for retry sleep backoff
type Backoff interface {
Next() bool
Next(err error) bool
Reset()
}
// ConstantBackoff implements Backoff interface with constant sleep time
// ConstantBackoff implements Backoff interface with constant sleep time. If the error
// is retryable and with `RetryAfter` defined, the `RetryAfter` will be used as sleep duration.
type ConstantBackoff struct {
Sleep time.Duration
Max int
@ -16,16 +24,51 @@ type ConstantBackoff struct {
tried int
}
func (c *ConstantBackoff) Next() bool {
func (c *ConstantBackoff) Next(err error) bool {
c.tried++
if c.tried > c.Max {
return false
}
time.Sleep(c.Sleep)
var e *RetryableError
if errors.As(err, &e) && e.RetryAfter > 0 {
util.Log().Warning("Retryable error %q occurs in backoff, will sleep after %s.", e, e.RetryAfter)
time.Sleep(e.RetryAfter)
} else {
time.Sleep(c.Sleep)
}
return true
}
func (c *ConstantBackoff) Reset() {
c.tried = 0
}
type RetryableError struct {
Err error
RetryAfter time.Duration
}
// NewRetryableErrorFromHeader constructs a new RetryableError from http response header
// and existing error.
func NewRetryableErrorFromHeader(err error, header http.Header) *RetryableError {
retryAfter := header.Get("retry-after")
if retryAfter == "" {
retryAfter = "0"
}
res := &RetryableError{
Err: err,
}
if retryAfterSecond, err := strconv.ParseInt(retryAfter, 10, 64); err == nil {
res.RetryAfter = time.Duration(retryAfterSecond) * time.Second
}
return res
}
func (e *RetryableError) Error() string {
return fmt.Sprintf("retryable error with retry-after=%s: %s", e.RetryAfter, e.Err)
}

59
pkg/filesystem/chunk/backoff/backoff_test.go
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@ -1,7 +1,9 @@
package backoff
import (
"errors"
"github.com/stretchr/testify/assert"
"net/http"
"testing"
"time"
)
@ -9,14 +11,51 @@ import (
func TestConstantBackoff_Next(t *testing.T) {
a := assert.New(t)
b := &ConstantBackoff{Sleep: time.Duration(0), Max: 3}
a.True(b.Next())
a.True(b.Next())
a.True(b.Next())
a.False(b.Next())
b.Reset()
a.True(b.Next())
a.True(b.Next())
a.True(b.Next())
a.False(b.Next())
// General error
{
err := errors.New("error")
b := &ConstantBackoff{Sleep: time.Duration(0), Max: 3}
a.True(b.Next(err))
a.True(b.Next(err))
a.True(b.Next(err))
a.False(b.Next(err))
b.Reset()
a.True(b.Next(err))
a.True(b.Next(err))
a.True(b.Next(err))
a.False(b.Next(err))
}
// Retryable error
{
err := &RetryableError{RetryAfter: time.Duration(1)}
b := &ConstantBackoff{Sleep: time.Duration(0), Max: 3}
a.True(b.Next(err))
a.True(b.Next(err))
a.True(b.Next(err))
a.False(b.Next(err))
b.Reset()
a.True(b.Next(err))
a.True(b.Next(err))
a.True(b.Next(err))
a.False(b.Next(err))
}
}
func TestNewRetryableErrorFromHeader(t *testing.T) {
a := assert.New(t)
// no retry-after header
{
err := NewRetryableErrorFromHeader(nil, http.Header{})
a.Empty(err.RetryAfter)
}
// with retry-after header
{
header := http.Header{}
header.Add("retry-after", "120")
err := NewRetryableErrorFromHeader(nil, header)
a.EqualValues(time.Duration(120)*time.Second, err.RetryAfter)
}
}

11
pkg/filesystem/chunk/chunk.go
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@ -5,6 +5,7 @@ import (
"fmt"
"github.com/cloudreve/Cloudreve/v3/pkg/filesystem/chunk/backoff"
"github.com/cloudreve/Cloudreve/v3/pkg/filesystem/fsctx"
"github.com/cloudreve/Cloudreve/v3/pkg/request"
"github.com/cloudreve/Cloudreve/v3/pkg/util"
"io"
"os"
@ -66,7 +67,7 @@ func (c *ChunkGroup) TempAvailable() bool {
// Process a chunk with retry logic
func (c *ChunkGroup) Process(processor ChunkProcessFunc) error {
reader := io.LimitReader(c.file, int64(c.chunkSize))
reader := io.LimitReader(c.file, c.Length())
// If useBuffer is enabled, tee the reader to a temp file
if c.enableRetryBuffer && c.bufferTemp == nil && !c.file.Seekable() {
@ -90,13 +91,17 @@ func (c *ChunkGroup) Process(processor ChunkProcessFunc) error {
}
util.Log().Debug("Chunk %d will be read from temp file %q.", c.Index(), c.bufferTemp.Name())
reader = c.bufferTemp
reader = io.NopCloser(c.bufferTemp)
}
}
err := processor(c, reader)
if err != nil {
if err != context.Canceled && (c.file.Seekable() || c.TempAvailable()) && c.backoff.Next() {
if c.enableRetryBuffer {
request.BlackHole(reader)
}
if err != context.Canceled && (c.file.Seekable() || c.TempAvailable()) && c.backoff.Next(err) {
if c.file.Seekable() {
if _, seekErr := c.file.Seek(c.Start(), io.SeekStart); seekErr != nil {
return fmt.Errorf("failed to seek back to chunk start: %w, last error: %s", seekErr, err)

18
pkg/filesystem/driver/onedrive/api.go
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@ -7,7 +7,6 @@ import (
"fmt"
"github.com/cloudreve/Cloudreve/v3/pkg/conf"
"io"
"io/ioutil"
"net/http"
"net/url"
"path"
@ -51,11 +50,6 @@ func (info *FileInfo) GetSourcePath() string {
)
}
// Error 实现error接口
func (err RespError) Error() string {
return err.APIError.Message
}
func (client *Client) getRequestURL(api string, opts ...Option) string {
options := newDefaultOption()
for _, o := range opts {
@ -530,7 +524,7 @@ func sysError(err error) *RespError {
}}
}
func (client *Client) request(ctx context.Context, method string, url string, body io.Reader, option ...request.Option) (string, *RespError) {
func (client *Client) request(ctx context.Context, method string, url string, body io.Reader, option ...request.Option) (string, error) {
// 获取凭证
err := client.UpdateCredential(ctx, conf.SystemConfig.Mode == "slave")
if err != nil {
@ -579,15 +573,21 @@ func (client *Client) request(ctx context.Context, method string, url string, bo
util.Log().Debug("Onedrive returns unknown response: %s", respBody)
return "", sysError(decodeErr)
}
if res.Response.StatusCode == 429 {
util.Log().Warning("OneDrive request is throttled.")
return "", backoff.NewRetryableErrorFromHeader(&errResp, res.Response.Header)
}
return "", &errResp
}
return respBody, nil
}
func (client *Client) requestWithStr(ctx context.Context, method string, url string, body string, expectedCode int) (string, *RespError) {
func (client *Client) requestWithStr(ctx context.Context, method string, url string, body string, expectedCode int) (string, error) {
// 发送请求
bodyReader := ioutil.NopCloser(strings.NewReader(body))
bodyReader := io.NopCloser(strings.NewReader(body))
return client.request(ctx, method, url, bodyReader,
request.WithContentLength(int64(len(body))),
)

29
pkg/filesystem/driver/onedrive/api_test.go
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@ -112,6 +112,35 @@ func TestRequest(t *testing.T) {
asserts.Equal("error msg", err.Error())
}
// OneDrive返回429错误
{
header := http.Header{}
header.Add("retry-after", "120")
clientMock := ClientMock{}
clientMock.On(
"Request",
"POST",
"http://dev.com",
testMock.Anything,
testMock.Anything,
).Return(&request.Response{
Err: nil,
Response: &http.Response{
StatusCode: 429,
Header: header,
Body: ioutil.NopCloser(strings.NewReader(`{"error":{"message":"error msg"}}`)),
},
})
client.Request = clientMock
res, err := client.request(context.Background(), "POST", "http://dev.com", strings.NewReader(""))
clientMock.AssertExpectations(t)
asserts.Error(err)
asserts.Empty(res)
var retryErr *backoff.RetryableError
asserts.ErrorAs(err, &retryErr)
asserts.EqualValues(time.Duration(120)*time.Second, retryErr.RetryAfter)
}
// OneDrive返回未知响应
{
clientMock := ClientMock{}

5
pkg/filesystem/driver/onedrive/types.go
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@ -133,3 +133,8 @@ type Site struct {
func init() {
gob.Register(Credential{})
}
// Error 实现error接口
func (err RespError) Error() string {
return err.APIError.Message
}

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