diff --git a/internal/caches/partial_ranges.go b/internal/caches/partial_ranges.go
index d5f94f8..1623bb0 100644
--- a/internal/caches/partial_ranges.go
+++ b/internal/caches/partial_ranges.go
@@ -4,28 +4,37 @@ package caches
 
 import (
 	"encoding/json"
+	"errors"
+	"io/ioutil"
 )
 
 // PartialRanges 内容分区范围定义
 type PartialRanges struct {
-	ranges [][2]int64
+	Ranges [][2]int64 `json:"ranges"`
 }
 
 // NewPartialRanges 获取新对象
 func NewPartialRanges() *PartialRanges {
-	return &PartialRanges{ranges: [][2]int64{}}
+	return &PartialRanges{Ranges: [][2]int64{}}
 }
 
 // NewPartialRangesFromJSON 从JSON中解析范围
 func NewPartialRangesFromJSON(data []byte) (*PartialRanges, error) {
-	var rs = [][2]int64{}
+	var rs = NewPartialRanges()
 	err := json.Unmarshal(data, &rs)
 	if err != nil {
 		return nil, err
 	}
-	var r = NewPartialRanges()
-	r.ranges = rs
-	return r, nil
+
+	return rs, nil
+}
+
+func NewPartialRangesFromFile(path string) (*PartialRanges, error) {
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return NewPartialRangesFromJSON(data)
 }
 
 // Add 添加新范围
@@ -36,46 +45,41 @@ func (this *PartialRanges) Add(begin int64, end int64) {
 
 	var nr = [2]int64{begin, end}
 
-	var count = len(this.ranges)
+	var count = len(this.Ranges)
 	if count == 0 {
-		this.ranges = [][2]int64{nr}
+		this.Ranges = [][2]int64{nr}
 		return
 	}
 
 	// insert
 	// TODO 将来使用二分法改进
 	var index = -1
-	for i, r := range this.ranges {
+	for i, r := range this.Ranges {
 		if r[0] > begin || (r[0] == begin && r[1] >= end) {
 			index = i
-			this.ranges = append(this.ranges, [2]int64{})
-			copy(this.ranges[index+1:], this.ranges[index:])
-			this.ranges[index] = nr
+			this.Ranges = append(this.Ranges, [2]int64{})
+			copy(this.Ranges[index+1:], this.Ranges[index:])
+			this.Ranges[index] = nr
 			break
 		}
 	}
 
 	if index == -1 {
 		index = count
-		this.ranges = append(this.ranges, nr)
+		this.Ranges = append(this.Ranges, nr)
 	}
 
 	this.merge(index)
 }
 
-// Ranges 获取所有范围
-func (this *PartialRanges) Ranges() [][2]int64 {
-	return this.ranges
-}
-
 // Contains 检查是否包含某个范围
 func (this *PartialRanges) Contains(begin int64, end int64) bool {
-	if len(this.ranges) == 0 {
-		return true
+	if len(this.Ranges) == 0 {
+		return false
 	}
 
 	// TODO 使用二分法查找改进性能
-	for _, r2 := range this.ranges {
+	for _, r2 := range this.Ranges {
 		if r2[0] <= begin && r2[1] >= end {
 			return true
 		}
@@ -86,21 +90,46 @@ func (this *PartialRanges) Contains(begin int64, end int64) bool {
 
 // AsJSON 转换为JSON
 func (this *PartialRanges) AsJSON() ([]byte, error) {
-	return json.Marshal(this.ranges)
+	return json.Marshal(this)
+}
+
+// WriteToFile 写入到文件中
+func (this *PartialRanges) WriteToFile(path string) error {
+	data, err := this.AsJSON()
+	if err != nil {
+		return errors.New("convert to json failed: " + err.Error())
+	}
+	return ioutil.WriteFile(path, data, 0666)
+}
+
+// ReadFromFile 从文件中读取
+func (this *PartialRanges) ReadFromFile(path string) (*PartialRanges, error) {
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return NewPartialRangesFromJSON(data)
+}
+
+func (this *PartialRanges) Max() int64 {
+	if len(this.Ranges) > 0 {
+		return this.Ranges[len(this.Ranges)-1][1]
+	}
+	return 0
 }
 
 func (this *PartialRanges) merge(index int) {
 	// forward
 	var lastIndex = index
 	for i := index; i >= 1; i-- {
-		var curr = this.ranges[i]
-		var prev = this.ranges[i-1]
+		var curr = this.Ranges[i]
+		var prev = this.Ranges[i-1]
 		var w1 = this.w(curr)
 		var w2 = this.w(prev)
 		if w1+w2 >= this.max(curr[1], prev[1])-this.min(curr[0], prev[0])-1 {
 			prev = [2]int64{this.min(curr[0], prev[0]), this.max(curr[1], prev[1])}
-			this.ranges[i-1] = prev
-			this.ranges = append(this.ranges[:i], this.ranges[i+1:]...)
+			this.Ranges[i-1] = prev
+			this.Ranges = append(this.Ranges[:i], this.Ranges[i+1:]...)
 			lastIndex = i - 1
 		} else {
 			break
@@ -109,15 +138,15 @@ func (this *PartialRanges) merge(index int) {
 
 	// backward
 	index = lastIndex
-	for index < len(this.ranges)-1 {
-		var curr = this.ranges[index]
-		var next = this.ranges[index+1]
+	for index < len(this.Ranges)-1 {
+		var curr = this.Ranges[index]
+		var next = this.Ranges[index+1]
 		var w1 = this.w(curr)
 		var w2 = this.w(next)
 		if w1+w2 >= this.max(curr[1], next[1])-this.min(curr[0], next[0])-1 {
 			curr = [2]int64{this.min(curr[0], next[0]), this.max(curr[1], next[1])}
-			this.ranges = append(this.ranges[:index], this.ranges[index+1:]...)
-			this.ranges[index] = curr
+			this.Ranges = append(this.Ranges[:index], this.Ranges[index+1:]...)
+			this.Ranges[index] = curr
 		} else {
 			break
 		}
diff --git a/internal/caches/partial_ranges_test.go b/internal/caches/partial_ranges_test.go
index 5476970..900d9b2 100644
--- a/internal/caches/partial_ranges_test.go
+++ b/internal/caches/partial_ranges_test.go
@@ -21,7 +21,8 @@ func TestNewPartialRanges(t *testing.T) {
 	r.Add(200, 1000)
 	r.Add(200, 10040)
 
-	logs.PrintAsJSON(r.Ranges())
+	logs.PrintAsJSON(r.Ranges, t)
+	t.Log("max:", r.Max())
 }
 
 func TestNewPartialRanges1(t *testing.T) {
@@ -35,7 +36,7 @@ func TestNewPartialRanges1(t *testing.T) {
 	r.Add(200, 300)
 	r.Add(1, 1000)
 
-	var rs = r.Ranges()
+	var rs = r.Ranges
 	logs.PrintAsJSON(rs, t)
 	a.IsTrue(len(rs) == 1)
 	if len(rs) == 1 {
@@ -56,7 +57,7 @@ func TestNewPartialRanges2(t *testing.T) {
 	r.Add(303, 304)
 	r.Add(250, 400)
 
-	var rs = r.Ranges()
+	var rs = r.Ranges
 	logs.PrintAsJSON(rs, t)
 }
 
@@ -68,7 +69,7 @@ func TestNewPartialRanges3(t *testing.T) {
 	r.Add(200, 300)
 	r.Add(250, 400)
 
-	var rs = r.Ranges()
+	var rs = r.Ranges
 	logs.PrintAsJSON(rs, t)
 }
 
@@ -83,7 +84,7 @@ func TestNewPartialRanges4(t *testing.T) {
 	r.Add(410, 415)
 	r.Add(400, 409)
 
-	var rs = r.Ranges()
+	var rs = r.Ranges
 	logs.PrintAsJSON(rs, t)
 	t.Log(r.Contains(400, 416))
 }
@@ -93,7 +94,7 @@ func TestNewPartialRanges5(t *testing.T) {
 	for j := 0; j < 1000; j++ {
 		r.Add(int64(j), int64(j+100))
 	}
-	logs.PrintAsJSON(r.Ranges(), t)
+	logs.PrintAsJSON(r.Ranges, t)
 }
 
 func TestNewPartialRanges_AsJSON(t *testing.T) {
@@ -111,7 +112,7 @@ func TestNewPartialRanges_AsJSON(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	t.Log(r2.Ranges())
+	t.Log(r2.Ranges)
 }
 
 func BenchmarkNewPartialRanges(b *testing.B) {
diff --git a/internal/caches/reader.go b/internal/caches/reader.go
index 4ae9f21..d387cd1 100644
--- a/internal/caches/reader.go
+++ b/internal/caches/reader.go
@@ -1,5 +1,7 @@
 package caches
 
+import "github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
+
 type ReaderFunc func(n int) (goNext bool, err error)
 
 type Reader interface {
@@ -36,6 +38,9 @@ type Reader interface {
 	// BodySize Body Size
 	BodySize() int64
 
+	// ContainsRange 是否包含某个区间内容
+	ContainsRange(r rangeutils.Range) bool
+
 	// Close 关闭
 	Close() error
 }
diff --git a/internal/caches/reader_file.go b/internal/caches/reader_file.go
index 6fec531..122a23c 100644
--- a/internal/caches/reader_file.go
+++ b/internal/caches/reader_file.go
@@ -3,6 +3,7 @@ package caches
 import (
 	"encoding/binary"
 	"errors"
+	rangeutils "github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
 	"github.com/iwind/TeaGo/types"
 	"io"
 	"os"
@@ -332,6 +333,11 @@ func (this *FileReader) ReadBodyRange(buf []byte, start int64, end int64, callba
 	return nil
 }
 
+// ContainsRange 是否包含某些区间内容
+func (this *FileReader) ContainsRange(r rangeutils.Range) bool {
+	return true
+}
+
 func (this *FileReader) Close() error {
 	if this.openFileCache != nil {
 		if this.isClosed {
diff --git a/internal/caches/reader_memory.go b/internal/caches/reader_memory.go
index 76998b5..bb2ca5a 100644
--- a/internal/caches/reader_memory.go
+++ b/internal/caches/reader_memory.go
@@ -2,6 +2,7 @@ package caches
 
 import (
 	"errors"
+	rangeutils "github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
 	"io"
 )
 
@@ -197,6 +198,11 @@ func (this *MemoryReader) ReadBodyRange(buf []byte, start int64, end int64, call
 	return nil
 }
 
+// ContainsRange 是否包含某些区间内容
+func (this *MemoryReader) ContainsRange(r rangeutils.Range) bool {
+	return true
+}
+
 func (this *MemoryReader) Close() error {
 	return nil
 }
diff --git a/internal/caches/reader_partial_file.go b/internal/caches/reader_partial_file.go
new file mode 100644
index 0000000..70be30f
--- /dev/null
+++ b/internal/caches/reader_partial_file.go
@@ -0,0 +1,142 @@
+package caches
+
+import (
+	"encoding/binary"
+	"errors"
+	rangeutils "github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
+	"github.com/iwind/TeaGo/types"
+	"io"
+	"os"
+	"strings"
+)
+
+type PartialFileReader struct {
+	*FileReader
+
+	ranges    *PartialRanges
+	rangePath string
+}
+
+func NewPartialFileReader(fp *os.File) *PartialFileReader {
+	// range path
+	var path = fp.Name()
+	var dotIndex = strings.LastIndex(path, ".")
+	var rangePath = ""
+	if dotIndex < 0 {
+		rangePath = path + "@ranges.cache"
+	} else {
+		rangePath = path[:dotIndex] + "@ranges" + path[dotIndex:]
+	}
+
+	return &PartialFileReader{
+		FileReader: NewFileReader(fp),
+		rangePath:  rangePath,
+	}
+}
+
+func (this *PartialFileReader) Init() error {
+	return this.InitAutoDiscard(true)
+}
+
+func (this *PartialFileReader) InitAutoDiscard(autoDiscard bool) error {
+	if this.openFile != nil {
+		this.meta = this.openFile.meta
+		this.header = this.openFile.header
+	}
+
+	isOk := false
+
+	if autoDiscard {
+		defer func() {
+			if !isOk {
+				_ = this.discard()
+			}
+		}()
+	}
+
+	// 读取Range
+	ranges, err := NewPartialRangesFromFile(this.rangePath)
+	if err != nil {
+		return errors.New("read ranges failed: " + err.Error())
+	}
+	this.ranges = ranges
+
+	var buf = this.meta
+	if len(buf) == 0 {
+		buf = make([]byte, SizeMeta)
+		ok, err := this.readToBuff(this.fp, buf)
+		if err != nil {
+			return err
+		}
+		if !ok {
+			return ErrNotFound
+		}
+		this.meta = buf
+	}
+
+	this.expiresAt = int64(binary.BigEndian.Uint32(buf[:SizeExpiresAt]))
+
+	status := types.Int(string(buf[SizeExpiresAt : SizeExpiresAt+SizeStatus]))
+	if status < 100 || status > 999 {
+		return errors.New("invalid status")
+	}
+	this.status = status
+
+	// URL
+	urlLength := binary.BigEndian.Uint32(buf[SizeExpiresAt+SizeStatus : SizeExpiresAt+SizeStatus+SizeURLLength])
+
+	// header
+	headerSize := int(binary.BigEndian.Uint32(buf[SizeExpiresAt+SizeStatus+SizeURLLength : SizeExpiresAt+SizeStatus+SizeURLLength+SizeHeaderLength]))
+	if headerSize == 0 {
+		return nil
+	}
+	this.headerSize = headerSize
+	this.headerOffset = int64(SizeMeta) + int64(urlLength)
+
+	// body
+	this.bodyOffset = this.headerOffset + int64(headerSize)
+	bodySize := int(binary.BigEndian.Uint64(buf[SizeExpiresAt+SizeStatus+SizeURLLength+SizeHeaderLength : SizeExpiresAt+SizeStatus+SizeURLLength+SizeHeaderLength+SizeBodyLength]))
+	if bodySize == 0 {
+		isOk = true
+		return nil
+	}
+	this.bodySize = int64(bodySize)
+
+	// read header
+	if this.openFileCache != nil && len(this.header) == 0 {
+		if headerSize > 0 && headerSize <= 512 {
+			this.header = make([]byte, headerSize)
+			_, err := this.fp.Seek(this.headerOffset, io.SeekStart)
+			if err != nil {
+				return err
+			}
+			_, err = this.readToBuff(this.fp, this.header)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	isOk = true
+
+	return nil
+}
+
+// ContainsRange 是否包含某些区间内容
+// 这里的 r 是已经经过格式化的
+func (this *PartialFileReader) ContainsRange(r rangeutils.Range) bool {
+	return this.ranges.Contains(r.Start(), r.End())
+}
+
+// MaxLength 获取区间最大长度
+func (this *PartialFileReader) MaxLength() int64 {
+	if this.bodySize > 0 {
+		return this.bodySize
+	}
+	return this.ranges.Max() + 1
+}
+
+func (this *PartialFileReader) discard() error {
+	_ = os.Remove(this.rangePath)
+	return this.FileReader.discard()
+}
diff --git a/internal/caches/storage_file.go b/internal/caches/storage_file.go
index b6c5ac5..01f988f 100644
--- a/internal/caches/storage_file.go
+++ b/internal/caches/storage_file.go
@@ -216,19 +216,24 @@ func (this *FileStorage) Init() error {
 	return nil
 }
 
-func (this *FileStorage) OpenReader(key string, useStale bool) (Reader, error) {
-	return this.openReader(key, true, useStale)
+func (this *FileStorage) OpenReader(key string, useStale bool, isPartial bool) (Reader, error) {
+	return this.openReader(key, true, useStale, isPartial)
 }
 
-func (this *FileStorage) openReader(key string, allowMemory bool, useStale bool) (Reader, error) {
+func (this *FileStorage) openReader(key string, allowMemory bool, useStale bool, isPartial bool) (Reader, error) {
 	// 使用陈旧缓存的时候，我们认为是短暂的，只需要从文件里检查即可
 	if useStale {
 		allowMemory = false
 	}
 
+	// 区间缓存只存在文件中
+	if isPartial {
+		allowMemory = false
+	}
+
 	// 先尝试内存缓存
 	if allowMemory && this.memoryStorage != nil {
-		reader, err := this.memoryStorage.OpenReader(key, useStale)
+		reader, err := this.memoryStorage.OpenReader(key, useStale, isPartial)
 		if err == nil {
 			return reader, err
 		}
@@ -273,9 +278,18 @@ func (this *FileStorage) openReader(key string, allowMemory bool, useStale bool)
 		}
 	}()
 
-	var reader = NewFileReader(fp)
-	reader.openFile = openFile
-	reader.openFileCache = this.openFileCache
+	var reader Reader
+	if isPartial {
+		var partialFileReader = NewPartialFileReader(fp)
+		partialFileReader.openFile = openFile
+		partialFileReader.openFileCache = this.openFileCache
+		reader = partialFileReader
+	} else {
+		var fileReader = NewFileReader(fp)
+		fileReader.openFile = openFile
+		fileReader.openFileCache = this.openFileCache
+		reader = fileReader
+	}
 	err = reader.Init()
 	if err != nil {
 		return nil, err
@@ -284,40 +298,7 @@ func (this *FileStorage) openReader(key string, allowMemory bool, useStale bool)
 	// 增加点击量
 	// 1/1000采样
 	if allowMemory {
-		var rate = this.policy.PersistenceHitSampleRate
-		if rate <= 0 {
-			rate = 1000
-		}
-		if this.lastHotSize == 0 {
-			// 自动降低采样率来增加热点数据的缓存几率
-			rate = rate / 10
-		}
-		if rands.Int(0, rate) == 0 {
-			var hitErr = this.list.IncreaseHit(hash)
-			if hitErr != nil {
-				// 此错误可以忽略
-				remotelogs.Error("CACHE", "increase hit failed: "+hitErr.Error())
-			}
-
-			// 增加到热点
-			// 这里不收录缓存尺寸过大的文件
-			if this.memoryStorage != nil && reader.BodySize() > 0 && reader.BodySize() < 128*1024*1024 {
-				this.hotMapLocker.Lock()
-				hotItem, ok := this.hotMap[key]
-				if ok {
-					hotItem.Hits++
-					hotItem.ExpiresAt = reader.expiresAt
-				} else if len(this.hotMap) < HotItemSize { // 控制数量
-					this.hotMap[key] = &HotItem{
-						Key:       key,
-						ExpiresAt: reader.ExpiresAt(),
-						Status:    reader.Status(),
-						Hits:      1,
-					}
-				}
-				this.hotMapLocker.Unlock()
-			}
-		}
+		this.increaseHit(key, hash, reader)
 	}
 
 	isOk = true
@@ -380,7 +361,8 @@ func (this *FileStorage) OpenWriter(key string, expiredAt int64, status int, siz
 	}
 
 	// 检查缓存是否已经生成
-	var cachePath = dir + "/" + hash + ".cache"
+	var cachePathName = dir + "/" + hash
+	var cachePath = cachePathName + ".cache"
 	stat, err := os.Stat(cachePath)
 	if err == nil && time.Now().Sub(stat.ModTime()) <= 1*time.Second {
 		// 防止并发连续写入
@@ -388,7 +370,7 @@ func (this *FileStorage) OpenWriter(key string, expiredAt int64, status int, siz
 	}
 	var tmpPath = cachePath + ".tmp"
 	if isPartial {
-		tmpPath = cachePath
+		tmpPath = cachePathName + ".cache"
 	}
 
 	// 先删除
@@ -502,7 +484,12 @@ func (this *FileStorage) OpenWriter(key string, expiredAt int64, status int, siz
 
 	isOk = true
 	if isPartial {
-		return NewPartialFileWriter(writer, key, expiredAt, isNewCreated, isPartial, partialBodyOffset, func() {
+		ranges, err := NewPartialRangesFromFile(cachePathName + "@ranges.cache")
+		if err != nil {
+			ranges = NewPartialRanges()
+		}
+
+		return NewPartialFileWriter(writer, key, expiredAt, isNewCreated, isPartial, partialBodyOffset, ranges, func() {
 			sharedWritingFileKeyLocker.Lock()
 			delete(sharedWritingFileKeyMap, key)
 			sharedWritingFileKeyLocker.Unlock()
@@ -923,7 +910,7 @@ func (this *FileStorage) hotLoop() {
 		var buf = utils.BytePool16k.Get()
 		defer utils.BytePool16k.Put(buf)
 		for _, item := range result[:size] {
-			reader, err := this.openReader(item.Key, false, false)
+			reader, err := this.openReader(item.Key, false, false, false)
 			if err != nil {
 				continue
 			}
@@ -1025,3 +1012,41 @@ func (this *FileStorage) cleanDeletedDirs(dir string) error {
 	}
 	return nil
 }
+
+// 增加某个Key的点击量
+func (this *FileStorage) increaseHit(key string, hash string, reader Reader) {
+	var rate = this.policy.PersistenceHitSampleRate
+	if rate <= 0 {
+		rate = 1000
+	}
+	if this.lastHotSize == 0 {
+		// 自动降低采样率来增加热点数据的缓存几率
+		rate = rate / 10
+	}
+	if rands.Int(0, rate) == 0 {
+		var hitErr = this.list.IncreaseHit(hash)
+		if hitErr != nil {
+			// 此错误可以忽略
+			remotelogs.Error("CACHE", "increase hit failed: "+hitErr.Error())
+		}
+
+		// 增加到热点
+		// 这里不收录缓存尺寸过大的文件
+		if this.memoryStorage != nil && reader.BodySize() > 0 && reader.BodySize() < 128*1024*1024 {
+			this.hotMapLocker.Lock()
+			hotItem, ok := this.hotMap[key]
+			if ok {
+				hotItem.Hits++
+				hotItem.ExpiresAt = reader.ExpiresAt()
+			} else if len(this.hotMap) < HotItemSize { // 控制数量
+				this.hotMap[key] = &HotItem{
+					Key:       key,
+					ExpiresAt: reader.ExpiresAt(),
+					Status:    reader.Status(),
+					Hits:      1,
+				}
+			}
+			this.hotMapLocker.Unlock()
+		}
+	}
+}
diff --git a/internal/caches/storage_file_test.go b/internal/caches/storage_file_test.go
index 38f3fc0..d8e2749 100644
--- a/internal/caches/storage_file_test.go
+++ b/internal/caches/storage_file_test.go
@@ -110,7 +110,7 @@ func TestFileStorage_OpenWriter_Partial(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	err = writer.WriteAt([]byte("Hello, World"), 0)
+	err = writer.WriteAt(0, []byte("Hello, World"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -311,7 +311,7 @@ func TestFileStorage_Read(t *testing.T) {
 		t.Fatal(err)
 	}
 	now := time.Now()
-	reader, err := storage.OpenReader("my-key", false)
+	reader, err := storage.OpenReader("my-key", false, false)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -347,7 +347,7 @@ func TestFileStorage_Read_HTTP_Response(t *testing.T) {
 		t.Fatal(err)
 	}
 	now := time.Now()
-	reader, err := storage.OpenReader("my-http-response", false)
+	reader, err := storage.OpenReader("my-http-response", false, false)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -401,7 +401,7 @@ func TestFileStorage_Read_NotFound(t *testing.T) {
 	}
 	now := time.Now()
 	buf := make([]byte, 6)
-	reader, err := storage.OpenReader("my-key-10000", false)
+	reader, err := storage.OpenReader("my-key-10000", false, false)
 	if err != nil {
 		if err == ErrNotFound {
 			t.Log("cache not fund")
@@ -543,7 +543,7 @@ func BenchmarkFileStorage_Read(b *testing.B) {
 		b.Fatal(err)
 	}
 	for i := 0; i < b.N; i++ {
-		reader, err := storage.OpenReader("my-key", false)
+		reader, err := storage.OpenReader("my-key", false, false)
 		if err != nil {
 			b.Fatal(err)
 		}
diff --git a/internal/caches/storage_interface.go b/internal/caches/storage_interface.go
index 2ed8647..98d4f0b 100644
--- a/internal/caches/storage_interface.go
+++ b/internal/caches/storage_interface.go
@@ -10,7 +10,7 @@ type StorageInterface interface {
 	Init() error
 
 	// OpenReader 读取缓存
-	OpenReader(key string, useStale bool) (reader Reader, err error)
+	OpenReader(key string, useStale bool, isPartial bool) (reader Reader, err error)
 
 	// OpenWriter 打开缓存写入器等待写入
 	OpenWriter(key string, expiredAt int64, status int, size int64, isPartial bool) (Writer, error)
diff --git a/internal/caches/storage_memory.go b/internal/caches/storage_memory.go
index 9700fed..5b98339 100644
--- a/internal/caches/storage_memory.go
+++ b/internal/caches/storage_memory.go
@@ -105,7 +105,7 @@ func (this *MemoryStorage) Init() error {
 }
 
 // OpenReader 读取缓存
-func (this *MemoryStorage) OpenReader(key string, useStale bool) (Reader, error) {
+func (this *MemoryStorage) OpenReader(key string, useStale bool, isPartial bool) (Reader, error) {
 	hash := this.hash(key)
 
 	this.locker.RLock()
diff --git a/internal/caches/storage_memory_test.go b/internal/caches/storage_memory_test.go
index fe6da81..38c5c1d 100644
--- a/internal/caches/storage_memory_test.go
+++ b/internal/caches/storage_memory_test.go
@@ -25,7 +25,7 @@ func TestMemoryStorage_OpenWriter(t *testing.T) {
 	t.Log(storage.valuesMap)
 
 	{
-		reader, err := storage.OpenReader("abc", false)
+		reader, err := storage.OpenReader("abc", false, false)
 		if err != nil {
 			if err == ErrNotFound {
 				t.Log("not found: abc")
@@ -52,7 +52,7 @@ func TestMemoryStorage_OpenWriter(t *testing.T) {
 	}
 
 	{
-		_, err := storage.OpenReader("abc 2", false)
+		_, err := storage.OpenReader("abc 2", false, false)
 		if err != nil {
 			if err == ErrNotFound {
 				t.Log("not found: abc2")
@@ -68,7 +68,7 @@ func TestMemoryStorage_OpenWriter(t *testing.T) {
 	}
 	_, _ = writer.Write([]byte("Hello123"))
 	{
-		reader, err := storage.OpenReader("abc", false)
+		reader, err := storage.OpenReader("abc", false, false)
 		if err != nil {
 			if err == ErrNotFound {
 				t.Log("not found: abc")
@@ -97,7 +97,7 @@ func TestMemoryStorage_OpenReaderLock(t *testing.T) {
 			IsDone: true,
 		},
 	}
-	_, _ = storage.OpenReader("test", false)
+	_, _ = storage.OpenReader("test", false, false)
 }
 
 func TestMemoryStorage_Delete(t *testing.T) {
diff --git a/internal/caches/writer.go b/internal/caches/writer.go
index 40e66bc..975764c 100644
--- a/internal/caches/writer.go
+++ b/internal/caches/writer.go
@@ -9,7 +9,7 @@ type Writer interface {
 	Write(data []byte) (n int, err error)
 
 	// WriteAt 在指定位置写入数据
-	WriteAt(data []byte, offset int64) error
+	WriteAt(offset int64, data []byte) error
 
 	// HeaderSize 写入的Header数据大小
 	HeaderSize() int64
diff --git a/internal/caches/writer_file.go b/internal/caches/writer_file.go
index 550643a..5a34c68 100644
--- a/internal/caches/writer_file.go
+++ b/internal/caches/writer_file.go
@@ -67,7 +67,7 @@ func (this *FileWriter) Write(data []byte) (n int, err error) {
 }
 
 // WriteAt 在指定位置写入数据
-func (this *FileWriter) WriteAt(data []byte, offset int64) error {
+func (this *FileWriter) WriteAt(offset int64, data []byte) error {
 	_ = data
 	_ = offset
 	return errors.New("not supported")
diff --git a/internal/caches/writer_memory.go b/internal/caches/writer_memory.go
index e2e9771..9b675f8 100644
--- a/internal/caches/writer_memory.go
+++ b/internal/caches/writer_memory.go
@@ -57,7 +57,7 @@ func (this *MemoryWriter) Write(data []byte) (n int, err error) {
 }
 
 // WriteAt 在指定位置写入数据
-func (this *MemoryWriter) WriteAt(b []byte, offset int64) error {
+func (this *MemoryWriter) WriteAt(offset int64, b []byte) error {
 	_ = b
 	_ = offset
 	return errors.New("not supported")
diff --git a/internal/caches/writer_partial_file.go b/internal/caches/writer_partial_file.go
index 24821e9..2262151 100644
--- a/internal/caches/writer_partial_file.go
+++ b/internal/caches/writer_partial_file.go
@@ -23,9 +23,22 @@ type PartialFileWriter struct {
 	isNew      bool
 	isPartial  bool
 	bodyOffset int64
+
+	ranges    *PartialRanges
+	rangePath string
 }
 
-func NewPartialFileWriter(rawWriter *os.File, key string, expiredAt int64, isNew bool, isPartial bool, bodyOffset int64, endFunc func()) *PartialFileWriter {
+func NewPartialFileWriter(rawWriter *os.File, key string, expiredAt int64, isNew bool, isPartial bool, bodyOffset int64, ranges *PartialRanges, endFunc func()) *PartialFileWriter {
+	var path = rawWriter.Name()
+	// ranges路径
+	var dotIndex = strings.LastIndex(path, ".")
+	var rangePath = ""
+	if dotIndex < 0 {
+		rangePath = path + "@ranges.cache"
+	} else {
+		rangePath = path[:dotIndex] + "@ranges" + path[dotIndex:]
+	}
+
 	return &PartialFileWriter{
 		key:        key,
 		rawWriter:  rawWriter,
@@ -34,6 +47,8 @@ func NewPartialFileWriter(rawWriter *os.File, key string, expiredAt int64, isNew
 		isNew:      isNew,
 		isPartial:  isPartial,
 		bodyOffset: bodyOffset,
+		ranges:     ranges,
+		rangePath:  rangePath,
 	}
 }
 
@@ -50,6 +65,21 @@ func (this *PartialFileWriter) WriteHeader(data []byte) (n int, err error) {
 	return
 }
 
+func (this *PartialFileWriter) AppendHeader(data []byte) error {
+	_, err := this.rawWriter.Write(data)
+	if err != nil {
+		_ = this.Discard()
+	} else {
+		var c = len(data)
+		this.headerSize += int64(c)
+		err = this.WriteHeaderLength(int(this.headerSize))
+		if err != nil {
+			_ = this.Discard()
+		}
+	}
+	return err
+}
+
 // WriteHeaderLength 写入Header长度数据
 func (this *PartialFileWriter) WriteHeaderLength(headerLength int) error {
 	bytes4 := make([]byte, 4)
@@ -78,12 +108,34 @@ func (this *PartialFileWriter) Write(data []byte) (n int, err error) {
 }
 
 // WriteAt 在指定位置写入数据
-func (this *PartialFileWriter) WriteAt(data []byte, offset int64) error {
+func (this *PartialFileWriter) WriteAt(offset int64, data []byte) error {
+	var c = int64(len(data))
+	if c == 0 {
+		return nil
+	}
+	var end = offset + c - 1
+
+	// 是否已包含在内
+	if this.ranges.Contains(offset, end) {
+		return nil
+	}
+
 	if this.bodyOffset == 0 {
 		this.bodyOffset = SizeMeta + int64(len(this.key)) + this.headerSize
 	}
 	_, err := this.rawWriter.WriteAt(data, this.bodyOffset+offset)
-	return err
+	if err != nil {
+		return err
+	}
+
+	this.ranges.Add(offset, end)
+
+	return nil
+}
+
+// SetBodyLength 设置内容总长度
+func (this *PartialFileWriter) SetBodyLength(bodyLength int64) {
+	this.bodySize = bodyLength
 }
 
 // WriteBodyLength 写入Body长度数据
@@ -109,31 +161,30 @@ func (this *PartialFileWriter) Close() error {
 		this.endFunc()
 	})
 
-	var path = this.rawWriter.Name()
+	err := this.ranges.WriteToFile(this.rangePath)
+	if err != nil {
+		return err
+	}
 
+	// 关闭当前writer
 	if this.isNew {
-		err := this.WriteHeaderLength(types.Int(this.headerSize))
+		err = this.WriteHeaderLength(types.Int(this.headerSize))
 		if err != nil {
 			_ = this.rawWriter.Close()
-			_ = os.Remove(path)
+			this.remove()
 			return err
 		}
 		err = this.WriteBodyLength(this.bodySize)
 		if err != nil {
 			_ = this.rawWriter.Close()
-			_ = os.Remove(path)
+			this.remove()
 			return err
 		}
 	}
 
-	err := this.rawWriter.Close()
+	err = this.rawWriter.Close()
 	if err != nil {
-		_ = os.Remove(path)
-	} else if !this.isPartial {
-		err = os.Rename(path, strings.Replace(path, ".tmp", "", 1))
-		if err != nil {
-			_ = os.Remove(path)
-		}
+		this.remove()
 	}
 
 	return err
@@ -147,6 +198,8 @@ func (this *PartialFileWriter) Discard() error {
 
 	_ = this.rawWriter.Close()
 
+	_ = os.Remove(this.rangePath)
+
 	err := os.Remove(this.rawWriter.Name())
 	return err
 }
@@ -171,3 +224,12 @@ func (this *PartialFileWriter) Key() string {
 func (this *PartialFileWriter) ItemType() ItemType {
 	return ItemTypeFile
 }
+
+func (this *PartialFileWriter) IsNew() bool {
+	return this.isNew && len(this.ranges.Ranges) == 0
+}
+
+func (this *PartialFileWriter) remove() {
+	_ = os.Remove(this.rawWriter.Name())
+	_ = os.Remove(this.rangePath)
+}
diff --git a/internal/caches/writer_partial_file_test.go b/internal/caches/writer_partial_file_test.go
index 0058d33..af50569 100644
--- a/internal/caches/writer_partial_file_test.go
+++ b/internal/caches/writer_partial_file_test.go
@@ -11,8 +11,8 @@ import (
 	"time"
 )
 
-func TestPartialFileWriter_SeekOffset(t *testing.T) {
-	var path = "/tmp/test@partial.cache"
+func TestPartialFileWriter_Write(t *testing.T) {
+	var path = "/tmp/test_partial.cache"
 	_ = os.Remove(path)
 
 	var reader = func() {
@@ -27,7 +27,8 @@ func TestPartialFileWriter_SeekOffset(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	var writer = caches.NewPartialFileWriter(fp, "test", time.Now().Unix()+86500, true, true, 0, func() {
+	var ranges = caches.NewPartialRanges()
+	var writer = caches.NewPartialFileWriter(fp, "test", time.Now().Unix()+86500, true, true, 0, ranges, func() {
 		t.Log("end")
 	})
 	_, err = writer.WriteHeader([]byte("header"))
@@ -36,7 +37,7 @@ func TestPartialFileWriter_SeekOffset(t *testing.T) {
 	}
 
 	// 移动位置
-	err = writer.WriteAt([]byte("HELLO"), 100)
+	err = writer.WriteAt(100, []byte("HELLO"))
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/internal/nodes/api_stream.go b/internal/nodes/api_stream.go
index 1d23f16..9c51db3 100644
--- a/internal/nodes/api_stream.go
+++ b/internal/nodes/api_stream.go
@@ -240,7 +240,7 @@ func (this *APIStream) handleReadCache(message *pb.NodeStreamMessage) error {
 		}()
 	}
 
-	reader, err := storage.OpenReader(msg.Key, false)
+	reader, err := storage.OpenReader(msg.Key, false, false)
 	if err != nil {
 		if err == caches.ErrNotFound {
 			this.replyFail(message.RequestId, "key not found")
@@ -351,7 +351,11 @@ func (this *APIStream) handlePurgeCache(message *pb.NodeStreamMessage) error {
 	if msg.Type == "file" {
 		var keys = msg.Keys
 		for _, key := range keys {
-			keys = append(keys, key+webpCacheSuffix, key+cacheMethodSuffix+"HEAD")
+			keys = append(keys,
+				key+cacheMethodSuffix+"HEAD",
+				key+webpCacheSuffix,
+				key+cachePartialSuffix,
+			)
 			// TODO 根据实际缓存的内容进行组合
 			for _, encoding := range compressions.AllEncodings() {
 				keys = append(keys, key+compressionCacheSuffix+encoding)
diff --git a/internal/nodes/http_request_cache.go b/internal/nodes/http_request_cache.go
index d1d8dff..2da9018 100644
--- a/internal/nodes/http_request_cache.go
+++ b/internal/nodes/http_request_cache.go
@@ -10,6 +10,8 @@ import (
 	"github.com/TeaOSLab/EdgeNode/internal/remotelogs"
 	"github.com/TeaOSLab/EdgeNode/internal/rpc"
 	"github.com/TeaOSLab/EdgeNode/internal/utils"
+	rangeutils "github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
+	"github.com/iwind/TeaGo/types"
 	"io"
 	"net/http"
 	"path/filepath"
@@ -36,6 +38,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 		return
 	}
 
+	// 添加 X-Cache Header
 	var addStatusHeader = this.web.Cache.AddStatusHeader
 	if addStatusHeader {
 		defer func() {
@@ -137,7 +140,12 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	if this.web.Cache.PurgeIsOn && strings.ToUpper(this.RawReq.Method) == "PURGE" && this.RawReq.Header.Get("X-Edge-Purge-Key") == this.web.Cache.PurgeKey {
 		this.varMapping["cache.status"] = "PURGE"
 
-		var subKeys = []string{key, key + cacheMethodSuffix + "HEAD"}
+		var subKeys = []string{
+			key,
+			key + cacheMethodSuffix + "HEAD",
+			key + webpCacheSuffix,
+			key + cachePartialSuffix,
+		}
 		// TODO 根据实际缓存的内容进行组合
 		for _, encoding := range compressions.AllEncodings() {
 			subKeys = append(subKeys, key+compressionCacheSuffix+encoding)
@@ -180,10 +188,14 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	var reader caches.Reader
 	var err error
 
+	var rangeHeader = this.RawReq.Header.Get("Range")
+	var isPartialRequest = len(rangeHeader) > 0
+
 	// 检查是否支持WebP
 	var webPIsEnabled = false
 	var isHeadMethod = method == http.MethodHead
-	if !isHeadMethod &&
+	if !isPartialRequest &&
+		!isHeadMethod &&
 		this.web.WebP != nil &&
 		this.web.WebP.IsOn &&
 		this.web.WebP.MatchRequest(filepath.Ext(this.Path()), this.Format) &&
@@ -192,13 +204,13 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	}
 
 	// 检查压缩缓存
-	if !isHeadMethod && reader == nil {
+	if !isPartialRequest && !isHeadMethod && reader == nil {
 		if this.web.Compression != nil && this.web.Compression.IsOn {
 			_, encoding, ok := this.web.Compression.MatchAcceptEncoding(this.RawReq.Header.Get("Accept-Encoding"))
 			if ok {
 				// 检查支持WebP的压缩缓存
 				if webPIsEnabled {
-					reader, _ = storage.OpenReader(key+webpCacheSuffix+compressionCacheSuffix+encoding, useStale)
+					reader, _ = storage.OpenReader(key+webpCacheSuffix+compressionCacheSuffix+encoding, useStale, false)
 					if reader != nil {
 						tags = append(tags, "webp", encoding)
 					}
@@ -206,7 +218,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 
 				// 检查普通缓存
 				if reader == nil {
-					reader, _ = storage.OpenReader(key+compressionCacheSuffix+encoding, useStale)
+					reader, _ = storage.OpenReader(key+compressionCacheSuffix+encoding, useStale, false)
 					if reader != nil {
 						tags = append(tags, encoding)
 					}
@@ -216,8 +228,11 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	}
 
 	// 检查WebP
-	if !isHeadMethod && reader == nil && webPIsEnabled {
-		reader, _ = storage.OpenReader(key+webpCacheSuffix, useStale)
+	if !isPartialRequest &&
+		!isHeadMethod &&
+		reader == nil &&
+		webPIsEnabled {
+		reader, _ = storage.OpenReader(key+webpCacheSuffix, useStale, false)
 		if reader != nil {
 			this.writer.cacheReaderSuffix = webpCacheSuffix
 			tags = append(tags, "webp")
@@ -225,8 +240,18 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	}
 
 	// 检查正常的文件
+	var isPartialCache = false
 	if reader == nil {
-		reader, err = storage.OpenReader(key, useStale)
+		reader, err = storage.OpenReader(key, useStale, false)
+		if err != nil && this.cacheRef.AllowPartialContent {
+			pReader := this.tryPartialReader(storage, key, useStale, rangeHeader)
+			if pReader != nil {
+				isPartialCache = true
+				reader = pReader
+				err = nil
+			}
+		}
+
 		if err != nil {
 			if err == caches.ErrNotFound {
 				// cache相关变量
@@ -260,7 +285,16 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	}
 
 	// 准备Buffer
-	var pool = this.bytePool(reader.BodySize())
+	var fileSize = reader.BodySize()
+	var totalSizeString = types.String(fileSize)
+	if isPartialCache {
+		fileSize = reader.(*caches.PartialFileReader).MaxLength()
+		if totalSizeString == "0" {
+			totalSizeString = "*"
+		}
+	}
+
+	var pool = this.bytePool(fileSize)
 	var buf = pool.Get()
 	defer func() {
 		pool.Put(buf)
@@ -323,7 +357,9 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 			eTag = "\"" + strconv.FormatInt(lastModifiedAt, 10) + "\""
 		}
 		respHeader.Del("Etag")
-		respHeader["ETag"] = []string{eTag}
+		if !isPartialCache {
+			respHeader["ETag"] = []string{eTag}
+		}
 	}
 
 	// 支持 Last-Modified
@@ -331,11 +367,13 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	var modifiedTime = ""
 	if lastModifiedAt > 0 {
 		modifiedTime = time.Unix(utils.GMTUnixTime(lastModifiedAt), 0).Format("Mon, 02 Jan 2006 15:04:05") + " GMT"
-		respHeader.Set("Last-Modified", modifiedTime)
+		if !isPartialCache {
+			respHeader.Set("Last-Modified", modifiedTime)
+		}
 	}
 
 	// 支持 If-None-Match
-	if len(eTag) > 0 && this.requestHeader("If-None-Match") == eTag {
+	if !isPartialCache && len(eTag) > 0 && this.requestHeader("If-None-Match") == eTag {
 		// 自定义Header
 		this.processResponseHeaders(http.StatusNotModified)
 		this.writer.WriteHeader(http.StatusNotModified)
@@ -346,7 +384,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	}
 
 	// 支持 If-Modified-Since
-	if len(modifiedTime) > 0 && this.requestHeader("If-Modified-Since") == modifiedTime {
+	if !isPartialCache && len(modifiedTime) > 0 && this.requestHeader("If-Modified-Since") == modifiedTime {
 		// 自定义Header
 		this.processResponseHeaders(http.StatusNotModified)
 		this.writer.WriteHeader(http.StatusNotModified)
@@ -364,69 +402,55 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 		this.writer.WriteHeader(reader.Status())
 	} else {
 		ifRangeHeaders, ok := this.RawReq.Header["If-Range"]
-		supportRange := true
+		var supportRange = true
 		if ok {
 			supportRange = false
 			for _, v := range ifRangeHeaders {
 				if v == this.writer.Header().Get("ETag") || v == this.writer.Header().Get("Last-Modified") {
 					supportRange = true
+					break
 				}
 			}
 		}
 
 		// 支持Range
-		rangeSet := [][]int64{}
+		var ranges = []rangeutils.Range{}
 		if supportRange {
-			fileSize := reader.BodySize()
-			contentRange := this.RawReq.Header.Get("Range")
-			if len(contentRange) > 0 {
+			if len(rangeHeader) > 0 {
 				if fileSize == 0 {
 					this.processResponseHeaders(http.StatusRequestedRangeNotSatisfiable)
 					this.writer.WriteHeader(http.StatusRequestedRangeNotSatisfiable)
 					return true
 				}
 
-				set, ok := httpRequestParseContentRange(contentRange)
+				set, ok := httpRequestParseRangeHeader(rangeHeader)
 				if !ok {
 					this.processResponseHeaders(http.StatusRequestedRangeNotSatisfiable)
 					this.writer.WriteHeader(http.StatusRequestedRangeNotSatisfiable)
 					return true
 				}
 				if len(set) > 0 {
-					rangeSet = set
-					for _, arr := range rangeSet {
-						if arr[0] == -1 {
-							arr[0] = fileSize + arr[1]
-							arr[1] = fileSize - 1
-
-							if arr[0] < 0 {
-								this.processResponseHeaders(http.StatusRequestedRangeNotSatisfiable)
-								this.writer.WriteHeader(http.StatusRequestedRangeNotSatisfiable)
-								return true
-							}
-						}
-						if arr[1] < 0 {
-							arr[1] = fileSize - 1
-						}
-						if arr[1] >= fileSize {
-							arr[1] = fileSize - 1
-						}
-						if arr[0] > arr[1] {
+					ranges = set
+					for k, r := range ranges {
+						r2, ok := r.Convert(fileSize)
+						if !ok {
 							this.processResponseHeaders(http.StatusRequestedRangeNotSatisfiable)
 							this.writer.WriteHeader(http.StatusRequestedRangeNotSatisfiable)
 							return true
 						}
+
+						ranges[k] = r2
 					}
 				}
 			}
 		}
 
-		if len(rangeSet) == 1 {
-			respHeader.Set("Content-Range", "bytes "+strconv.FormatInt(rangeSet[0][0], 10)+"-"+strconv.FormatInt(rangeSet[0][1], 10)+"/"+strconv.FormatInt(reader.BodySize(), 10))
-			respHeader.Set("Content-Length", strconv.FormatInt(rangeSet[0][1]-rangeSet[0][0]+1, 10))
+		if len(ranges) == 1 {
+			respHeader.Set("Content-Range", ranges[0].ComposeContentRangeHeader(totalSizeString))
+			respHeader.Set("Content-Length", strconv.FormatInt(ranges[0].Length(), 10))
 			this.writer.WriteHeader(http.StatusPartialContent)
 
-			err = reader.ReadBodyRange(buf, rangeSet[0][0], rangeSet[0][1], func(n int) (goNext bool, err error) {
+			err = reader.ReadBodyRange(buf, ranges[0].Start(), ranges[0].End(), func(n int) (goNext bool, err error) {
 				_, err = this.writer.Write(buf[:n])
 				if err != nil {
 					return false, errWritingToClient
@@ -446,15 +470,15 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 				}
 				return
 			}
-		} else if len(rangeSet) > 1 {
-			boundary := httpRequestGenBoundary()
+		} else if len(ranges) > 1 {
+			var boundary = httpRequestGenBoundary()
 			respHeader.Set("Content-Type", "multipart/byteranges; boundary="+boundary)
 			respHeader.Del("Content-Length")
 			contentType := respHeader.Get("Content-Type")
 
 			this.writer.WriteHeader(http.StatusPartialContent)
 
-			for index, set := range rangeSet {
+			for index, r := range ranges {
 				if index == 0 {
 					_, err = this.writer.WriteString("--" + boundary + "\r\n")
 				} else {
@@ -465,7 +489,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 					return true
 				}
 
-				_, err = this.writer.WriteString("Content-Range: " + "bytes " + strconv.FormatInt(set[0], 10) + "-" + strconv.FormatInt(set[1], 10) + "/" + strconv.FormatInt(reader.BodySize(), 10) + "\r\n")
+				_, err = this.writer.WriteString("Content-Range: " + r.ComposeContentRangeHeader(totalSizeString) + "\r\n")
 				if err != nil {
 					// 不提示写入客户端错误
 					return true
@@ -479,7 +503,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 					}
 				}
 
-				err := reader.ReadBodyRange(buf, set[0], set[1], func(n int) (goNext bool, err error) {
+				err := reader.ReadBodyRange(buf, r.Start(), r.End(), func(n int) (goNext bool, err error) {
 					_, err = this.writer.Write(buf[:n])
 					if err != nil {
 						return false, errWritingToClient
@@ -503,7 +527,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 			}
 		} else { // 没有Range
 			var resp = &http.Response{Body: reader}
-			this.writer.Prepare(resp, reader.BodySize(), reader.Status(), false)
+			this.writer.Prepare(resp, fileSize, reader.Status(), false)
 			this.writer.WriteHeader(reader.Status())
 
 			_, err = io.CopyBuffer(this.writer, resp.Body, buf)
@@ -544,3 +568,47 @@ func (this *HTTPRequest) addExpiresHeader(expiresAt int64) {
 		}
 	}
 }
+
+// 尝试读取区间缓存
+func (this *HTTPRequest) tryPartialReader(storage caches.StorageInterface, key string, useStale bool, rangeHeader string) caches.Reader {
+	// 尝试读取Partial cache
+	if len(rangeHeader) == 0 {
+		return nil
+	}
+
+	ranges, ok := httpRequestParseRangeHeader(rangeHeader)
+	if !ok {
+		return nil
+	}
+
+	pReader, pErr := storage.OpenReader(key+cachePartialSuffix, useStale, true)
+	if pErr != nil {
+		return nil
+	}
+
+	partialReader, ok := pReader.(*caches.PartialFileReader)
+	if !ok {
+		_ = pReader.Close()
+		return nil
+	}
+	var isOk = false
+	defer func() {
+		if !isOk {
+			_ = pReader.Close()
+		}
+	}()
+
+	// 检查范围
+	for _, r := range ranges {
+		r1, ok := r.Convert(partialReader.MaxLength())
+		if !ok {
+			return nil
+		}
+		if !partialReader.ContainsRange(r1) {
+			return nil
+		}
+	}
+
+	isOk = true
+	return pReader
+}
diff --git a/internal/nodes/http_request_root.go b/internal/nodes/http_request_root.go
index f22493b..bba8d1b 100644
--- a/internal/nodes/http_request_root.go
+++ b/internal/nodes/http_request_root.go
@@ -2,10 +2,12 @@ package nodes
 
 import (
 	"fmt"
+	rangeutils "github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
 	"github.com/TeaOSLab/EdgeNode/internal/zero"
 	"github.com/cespare/xxhash"
 	"github.com/iwind/TeaGo/Tea"
 	"github.com/iwind/TeaGo/logs"
+	"github.com/iwind/TeaGo/types"
 	"io"
 	"io/fs"
 	"mime"
@@ -186,7 +188,7 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 	}
 
 	// length
-	fileSize := stat.Size()
+	var fileSize = stat.Size()
 
 	// 支持 Last-Modified
 	modifiedTime := stat.ModTime().Format("Mon, 02 Jan 2006 15:04:05 GMT")
@@ -231,6 +233,7 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 		for _, v := range ifRangeHeaders {
 			if v == eTag || v == modifiedTime {
 				supportRange = true
+				break
 			}
 		}
 		if !supportRange {
@@ -239,7 +242,7 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 	}
 
 	// 支持Range
-	rangeSet := [][]int64{}
+	var ranges = []rangeutils.Range{}
 	if supportRange {
 		contentRange := this.RawReq.Header.Get("Range")
 		if len(contentRange) > 0 {
@@ -249,36 +252,22 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 				return true
 			}
 
-			set, ok := httpRequestParseContentRange(contentRange)
+			set, ok := httpRequestParseRangeHeader(contentRange)
 			if !ok {
 				this.processResponseHeaders(http.StatusRequestedRangeNotSatisfiable)
 				this.writer.WriteHeader(http.StatusRequestedRangeNotSatisfiable)
 				return true
 			}
 			if len(set) > 0 {
-				rangeSet = set
-				for _, arr := range rangeSet {
-					if arr[0] == -1 {
-						arr[0] = fileSize + arr[1]
-						arr[1] = fileSize - 1
-
-						if arr[0] < 0 {
-							this.processResponseHeaders(http.StatusRequestedRangeNotSatisfiable)
-							this.writer.WriteHeader(http.StatusRequestedRangeNotSatisfiable)
-							return true
-						}
-					}
-					if arr[1] > 0 {
-						arr[1] = fileSize - 1
-					}
-					if arr[1] < 0 {
-						arr[1] = fileSize - 1
-					}
-					if arr[0] > arr[1] {
+				ranges = set
+				for k, r := range ranges {
+					r2, ok := r.Convert(fileSize)
+					if !ok {
 						this.processResponseHeaders(http.StatusRequestedRangeNotSatisfiable)
 						this.writer.WriteHeader(http.StatusRequestedRangeNotSatisfiable)
 						return true
 					}
+					ranges[k] = r2
 				}
 			}
 		} else {
@@ -298,7 +287,7 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 	this.processResponseHeaders(http.StatusOK)
 
 	// 在Range请求中不能缓存
-	if len(rangeSet) > 0 {
+	if len(ranges) > 0 {
 		this.cacheRef = nil // 不支持缓存
 	}
 
@@ -311,11 +300,11 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 		pool.Put(buf)
 	}()
 
-	if len(rangeSet) == 1 {
-		respHeader.Set("Content-Range", "bytes "+strconv.FormatInt(rangeSet[0][0], 10)+"-"+strconv.FormatInt(rangeSet[0][1], 10)+"/"+strconv.FormatInt(fileSize, 10))
+	if len(ranges) == 1 {
+		respHeader.Set("Content-Range", ranges[0].ComposeContentRangeHeader(types.String(fileSize)))
 		this.writer.WriteHeader(http.StatusPartialContent)
 
-		ok, err := httpRequestReadRange(reader, buf, rangeSet[0][0], rangeSet[0][1], func(buf []byte, n int) error {
+		ok, err := httpRequestReadRange(reader, buf, ranges[0].Start(), ranges[0].End(), func(buf []byte, n int) error {
 			_, err := this.writer.Write(buf[:n])
 			return err
 		})
@@ -328,13 +317,13 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 			this.writer.WriteHeader(http.StatusRequestedRangeNotSatisfiable)
 			return true
 		}
-	} else if len(rangeSet) > 1 {
+	} else if len(ranges) > 1 {
 		boundary := httpRequestGenBoundary()
 		respHeader.Set("Content-Type", "multipart/byteranges; boundary="+boundary)
 
 		this.writer.WriteHeader(http.StatusPartialContent)
 
-		for index, set := range rangeSet {
+		for index, r := range ranges {
 			if index == 0 {
 				_, err = this.writer.WriteString("--" + boundary + "\r\n")
 			} else {
@@ -345,7 +334,7 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 				return true
 			}
 
-			_, err = this.writer.WriteString("Content-Range: " + "bytes " + strconv.FormatInt(set[0], 10) + "-" + strconv.FormatInt(set[1], 10) + "/" + strconv.FormatInt(fileSize, 10) + "\r\n")
+			_, err = this.writer.WriteString("Content-Range: " + r.ComposeContentRangeHeader(types.String(fileSize)) + "\r\n")
 			if err != nil {
 				logs.Error(err)
 				return true
@@ -359,7 +348,7 @@ func (this *HTTPRequest) doRoot() (isBreak bool) {
 				}
 			}
 
-			ok, err := httpRequestReadRange(reader, buf, set[0], set[1], func(buf []byte, n int) error {
+			ok, err := httpRequestReadRange(reader, buf, r.Start(), r.End(), func(buf []byte, n int) error {
 				_, err := this.writer.Write(buf[:n])
 				return err
 			})
diff --git a/internal/nodes/http_request_utils.go b/internal/nodes/http_request_utils.go
index 909b8b5..8b03ae3 100644
--- a/internal/nodes/http_request_utils.go
+++ b/internal/nodes/http_request_utils.go
@@ -5,15 +5,20 @@ import (
 	"fmt"
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
 	"github.com/TeaOSLab/EdgeNode/internal/utils"
+	"github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
+	"github.com/iwind/TeaGo/types"
 	"io"
 	"net/http"
+	"regexp"
 	"strconv"
 	"strings"
 	"sync/atomic"
 )
 
+var contentRangeRegexp = regexp.MustCompile(`^bytes (\d+)-(\d+)/`)
+
 // 分解Range
-func httpRequestParseContentRange(rangeValue string) (result [][]int64, ok bool) {
+func httpRequestParseRangeHeader(rangeValue string) (result []rangeutils.Range, ok bool) {
 	// 参考RFC：https://tools.ietf.org/html/rfc7233
 	index := strings.Index(rangeValue, "=")
 	if index == -1 {
@@ -24,15 +29,15 @@ func httpRequestParseContentRange(rangeValue string) (result [][]int64, ok bool)
 		return
 	}
 
-	rangeSetString := rangeValue[index+1:]
+	var rangeSetString = rangeValue[index+1:]
 	if len(rangeSetString) == 0 {
 		ok = true
 		return
 	}
 
-	pieces := strings.Split(rangeSetString, ", ")
+	var pieces = strings.Split(rangeSetString, ", ")
 	for _, piece := range pieces {
-		index := strings.Index(piece, "-")
+		index = strings.Index(piece, "-")
 		if index == -1 {
 			return
 		}
@@ -70,7 +75,7 @@ func httpRequestParseContentRange(rangeValue string) (result [][]int64, ok bool)
 			lastInt = -lastInt
 		}
 
-		result = append(result, []int64{firstInt, lastInt})
+		result = append(result, [2]int64{firstInt, lastInt})
 	}
 
 	ok = true
@@ -119,6 +124,15 @@ func httpRequestReadRange(reader io.Reader, buf []byte, start int64, end int64,
 	}
 }
 
+// 分解Content-Range
+func httpRequestParseContentRangeHeader(contentRange string) (start int64) {
+	var matches = contentRangeRegexp.FindStringSubmatch(contentRange)
+	if len(matches) < 3 {
+		return -1
+	}
+	return types.Int64(matches[1])
+}
+
 // 生成boundary
 // 仿照Golang自带的函数（multipart包）
 func httpRequestGenBoundary() string {
@@ -130,6 +144,21 @@ func httpRequestGenBoundary() string {
 	return fmt.Sprintf("%x", buf[:])
 }
 
+// 从content-type中读取boundary
+func httpRequestParseBoundary(contentType string) string {
+	var delim = "boundary="
+	var boundaryIndex = strings.Index(contentType, delim)
+	if boundaryIndex < 0 {
+		return ""
+	}
+	var boundary = contentType[boundaryIndex+len(delim):]
+	semicolonIndex := strings.Index(boundary, ";")
+	if semicolonIndex >= 0 {
+		return boundary[:semicolonIndex]
+	}
+	return boundary
+}
+
 // 判断状态是否为跳转
 func httpStatusIsRedirect(statusCode int) bool {
 	return statusCode == http.StatusPermanentRedirect ||
diff --git a/internal/nodes/http_request_utils_test.go b/internal/nodes/http_request_utils_test.go
index a671ae5..ec337ba 100644
--- a/internal/nodes/http_request_utils_test.go
+++ b/internal/nodes/http_request_utils_test.go
@@ -17,52 +17,84 @@ func TestHTTPRequest_httpRequestGenBoundary(t *testing.T) {
 	}
 }
 
-func TestHTTPRequest_httpRequestParseContentRange(t *testing.T) {
-	a := assert.NewAssertion(t)
+func TestHTTPRequest_httpRequestParseBoundary(t *testing.T) {
+	var a = assert.NewAssertion(t)
+	a.IsTrue(httpRequestParseBoundary("multipart/byteranges") == "")
+	a.IsTrue(httpRequestParseBoundary("multipart/byteranges; boundary=123") == "123")
+	a.IsTrue(httpRequestParseBoundary("multipart/byteranges; boundary=123; 456") == "123")
+}
+
+func TestHTTPRequest_httpRequestParseRangeHeader(t *testing.T) {
+	var a = assert.NewAssertion(t)
 	{
-		_, ok := httpRequestParseContentRange("")
+		_, ok := httpRequestParseRangeHeader("")
 		a.IsFalse(ok)
 	}
 	{
-		_, ok := httpRequestParseContentRange("byte=")
+		_, ok := httpRequestParseRangeHeader("byte=")
 		a.IsFalse(ok)
 	}
 	{
-		_, ok := httpRequestParseContentRange("byte=")
+		_, ok := httpRequestParseRangeHeader("byte=")
 		a.IsFalse(ok)
 	}
 	{
-		set, ok := httpRequestParseContentRange("bytes=")
+		set, ok := httpRequestParseRangeHeader("bytes=")
 		a.IsTrue(ok)
 		a.IsTrue(len(set) == 0)
 	}
 	{
-		_, ok := httpRequestParseContentRange("bytes=60-50")
+		_, ok := httpRequestParseRangeHeader("bytes=60-50")
 		a.IsFalse(ok)
 	}
 	{
-		set, ok := httpRequestParseContentRange("bytes=0-50")
+		set, ok := httpRequestParseRangeHeader("bytes=0-50")
 		a.IsTrue(ok)
 		a.IsTrue(len(set) > 0)
 		t.Log(set)
 	}
 	{
-		set, ok := httpRequestParseContentRange("bytes=0-")
+		set, ok := httpRequestParseRangeHeader("bytes=0-")
+		a.IsTrue(ok)
+		a.IsTrue(len(set) > 0)
+		if len(set) > 0 {
+			a.IsTrue(set[0][0] == 0)
+		}
+		t.Log(set)
+	}
+	{
+		set, ok := httpRequestParseRangeHeader("bytes=-50")
 		a.IsTrue(ok)
 		a.IsTrue(len(set) > 0)
 		t.Log(set)
 	}
 	{
-		set, ok := httpRequestParseContentRange("bytes=-50")
+		set, ok := httpRequestParseRangeHeader("bytes=0-50, 60-100")
 		a.IsTrue(ok)
 		a.IsTrue(len(set) > 0)
 		t.Log(set)
 	}
+}
+
+func TestHTTPRequest_httpRequestParseContentRangeHeader(t *testing.T) {
 	{
-		set, ok := httpRequestParseContentRange("bytes=0-50, 60-100")
-		a.IsTrue(ok)
-		a.IsTrue(len(set) > 0)
-		t.Log(set)
+		var c1 = "bytes 0-100/*"
+		t.Log(httpRequestParseContentRangeHeader(c1))
+	}
+	{
+		var c1 = "bytes 30-100/*"
+		t.Log(httpRequestParseContentRangeHeader(c1))
+	}
+	{
+		var c1 = "bytes1 0-100/*"
+		t.Log(httpRequestParseContentRangeHeader(c1))
+	}
+}
+
+func BenchmarkHTTPRequest_httpRequestParseContentRangeHeader(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		var c1 = "bytes 0-100/*"
+		httpRequestParseContentRangeHeader(c1)
 	}
 }
 
diff --git a/internal/nodes/http_writer.go b/internal/nodes/http_writer.go
index bf6ae15..2757cb4 100644
--- a/internal/nodes/http_writer.go
+++ b/internal/nodes/http_writer.go
@@ -28,6 +28,7 @@ import (
 	"io/ioutil"
 	"net"
 	"net/http"
+	"net/textproto"
 	"os"
 	"path/filepath"
 	"strings"
@@ -45,6 +46,7 @@ const compressionCacheSuffix = "@GOEDGE_"
 
 // 缓存相关配置
 const cacheMethodSuffix = "@GOEDGE_"
+const cachePartialSuffix = "@GOEDGE_partial"
 
 func init() {
 	var systemMemory = utils.SystemMemoryGB() / 8
@@ -157,12 +159,21 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 	var addStatusHeader = this.req.web != nil && this.req.web.Cache != nil && this.req.web.Cache.AddStatusHeader
 
 	// 不支持Range
-	if this.StatusCode() == http.StatusPartialContent || len(this.Header().Get("Content-Range")) > 0 {
-		this.req.varMapping["cache.status"] = "BYPASS"
-		if addStatusHeader {
-			this.Header().Set("X-Cache", "BYPASS, not supported Content-Range")
+	if this.isPartial {
+		if !cacheRef.AllowPartialContent {
+			this.req.varMapping["cache.status"] = "BYPASS"
+			if addStatusHeader {
+				this.Header().Set("X-Cache", "BYPASS, not supported partial content")
+			}
+			return
+		}
+		if this.cacheStorage.Policy().Type != serverconfigs.CachePolicyStorageFile {
+			this.req.varMapping["cache.status"] = "BYPASS"
+			if addStatusHeader {
+				this.Header().Set("X-Cache", "BYPASS, not supported partial content in memory storage")
+			}
+			return
 		}
-		return
 	}
 
 	// 如果允许 ChunkedEncoding，就无需尺寸的判断，因为此时的 size 为 -1
@@ -183,7 +194,7 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 	}
 
 	// 检查状态
-	if len(cacheRef.Status) > 0 && !lists.ContainsInt(cacheRef.Status, this.StatusCode()) {
+	if !this.isPartial && len(cacheRef.Status) > 0 && !lists.ContainsInt(cacheRef.Status, this.StatusCode()) {
 		this.req.varMapping["cache.status"] = "BYPASS"
 		if addStatusHeader {
 			this.Header().Set("X-Cache", "BYPASS, Status: "+types.String(this.StatusCode()))
@@ -193,7 +204,7 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 
 	// Cache-Control
 	if len(cacheRef.SkipResponseCacheControlValues) > 0 {
-		var cacheControl = this.Header().Get("Cache-Control")
+		var cacheControl = this.GetHeader("Cache-Control")
 		if len(cacheControl) > 0 {
 			values := strings.Split(cacheControl, ",")
 			for _, value := range values {
@@ -209,7 +220,7 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 	}
 
 	// Set-Cookie
-	if cacheRef.SkipResponseSetCookie && len(this.Header().Get("Set-Cookie")) > 0 {
+	if cacheRef.SkipResponseSetCookie && len(this.GetHeader("Set-Cookie")) > 0 {
 		this.req.varMapping["cache.status"] = "BYPASS"
 		if addStatusHeader {
 			this.Header().Set("X-Cache", "BYPASS, Set-Cookie")
@@ -242,7 +253,7 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 	}
 
 	this.cacheStorage = storage
-	life := cacheRef.LifeSeconds()
+	var life = cacheRef.LifeSeconds()
 
 	if life <= 0 {
 		life = 60
@@ -250,7 +261,7 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 
 	// 支持源站设置的max-age
 	if this.req.web.Cache != nil && this.req.web.Cache.EnableCacheControlMaxAge {
-		var cacheControl = this.Header().Get("Cache-Control")
+		var cacheControl = this.GetHeader("Cache-Control")
 		var pieces = strings.Split(cacheControl, ";")
 		for _, piece := range pieces {
 			var eqIndex = strings.Index(piece, "=")
@@ -265,7 +276,10 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 
 	var expiredAt = utils.UnixTime() + life
 	var cacheKey = this.req.cacheKey
-	cacheWriter, err := storage.OpenWriter(cacheKey, expiredAt, this.StatusCode(), size, false)
+	if this.isPartial {
+		cacheKey += cachePartialSuffix
+	}
+	cacheWriter, err := storage.OpenWriter(cacheKey, expiredAt, this.StatusCode(), size, this.isPartial)
 	if err != nil {
 		if !caches.CanIgnoreErr(err) {
 			remotelogs.Error("HTTP_WRITER", "write cache failed: "+err.Error())
@@ -277,6 +291,9 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 	// 写入Header
 	for k, v := range this.Header() {
 		for _, v1 := range v {
+			if this.isPartial && k == "Content-Type" && strings.Contains(v1, "multipart/byteranges") {
+				continue
+			}
 			_, err = cacheWriter.WriteHeader([]byte(k + ":" + v1 + "\n"))
 			if err != nil {
 				remotelogs.Error("HTTP_WRITER", "write cache failed: "+err.Error())
@@ -287,6 +304,101 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 		}
 	}
 
+	if this.isPartial {
+		// content-range
+		var contentRange = this.GetHeader("Content-Range")
+		if len(contentRange) > 0 {
+			var start = httpRequestParseContentRangeHeader(contentRange)
+			if start < 0 {
+				return
+			}
+			var filterReader = readers.NewFilterReaderCloser(resp.Body)
+			this.cacheIsFinished = true
+			var hasError = false
+			filterReader.Add(func(p []byte, err error) error {
+				if hasError {
+					return nil
+				}
+
+				var l = len(p)
+				if l == 0 {
+					return nil
+				}
+				defer func() {
+					start += int64(l)
+				}()
+				err = cacheWriter.WriteAt(start, p)
+				if err != nil {
+					this.cacheIsFinished = false
+					hasError = true
+				}
+				return nil
+			})
+			resp.Body = filterReader
+			this.rawReader = filterReader
+			return
+		}
+
+		// multipart/byteranges
+		var contentType = this.GetHeader("Content-Type")
+		if strings.Contains(contentType, "multipart/byteranges") {
+			partialWriter, ok := cacheWriter.(*caches.PartialFileWriter)
+			if !ok {
+				return
+			}
+
+			var boundary = httpRequestParseBoundary(contentType)
+			if len(boundary) == 0 {
+				return
+			}
+
+			var reader = readers.NewByteRangesReaderCloser(resp.Body, boundary)
+			var contentTypeWritten = false
+
+			this.cacheIsFinished = true
+			var hasError = false
+			var writtenTotal = false
+			reader.OnPartRead(func(start int64, end int64, total int64, data []byte, header textproto.MIMEHeader) {
+				if hasError {
+					return
+				}
+
+				// 写入total
+				if !writtenTotal && total > 0 {
+					partialWriter.SetBodyLength(total)
+					writtenTotal = true
+				}
+
+				// 写入Content-Type
+				if partialWriter.IsNew() && !contentTypeWritten {
+					var realContentType = header.Get("Content-Type")
+					if len(realContentType) > 0 {
+						var h = []byte("Content-Type:" + realContentType + "\n")
+						err = partialWriter.AppendHeader(h)
+						if err != nil {
+							hasError = true
+							this.cacheIsFinished = false
+							return
+						}
+					}
+
+					contentTypeWritten = true
+				}
+
+				err := cacheWriter.WriteAt(start, data)
+				if err != nil {
+					hasError = true
+					this.cacheIsFinished = false
+				}
+			})
+
+			resp.Body = reader
+			this.rawReader = reader
+		}
+
+		return
+	}
+
 	var cacheReader = readers.NewTeeReaderCloser(resp.Body, this.cacheWriter)
 	resp.Body = cacheReader
 	this.rawReader = cacheReader
@@ -306,7 +418,7 @@ func (this *HTTPWriter) PrepareWebP(resp *http.Response, size int64) {
 		return
 	}
 
-	var contentType = this.Header().Get("Content-Type")
+	var contentType = this.GetHeader("Content-Type")
 
 	if this.req.web != nil &&
 		this.req.web.WebP != nil &&
@@ -324,7 +436,7 @@ func (this *HTTPWriter) PrepareWebP(resp *http.Response, size int64) {
 			return
 		}
 
-		var contentEncoding = this.Header().Get("Content-Encoding")
+		var contentEncoding = this.GetHeader("Content-Encoding")
 		switch contentEncoding {
 		case "gzip", "deflate", "br":
 			reader, err := compressions.NewReader(resp.Body, contentEncoding)
@@ -361,7 +473,7 @@ func (this *HTTPWriter) PrepareCompression(resp *http.Response, size int64) {
 	}
 
 	var acceptEncodings = this.req.RawReq.Header.Get("Accept-Encoding")
-	var contentEncoding = this.Header().Get("Content-Encoding")
+	var contentEncoding = this.GetHeader("Content-Encoding")
 
 	if this.compressionConfig == nil || !this.compressionConfig.IsOn {
 		if lists.ContainsString([]string{"gzip", "deflate", "br"}, contentEncoding) && !httpAcceptEncoding(acceptEncodings, contentEncoding) {
@@ -386,7 +498,7 @@ func (this *HTTPWriter) PrepareCompression(resp *http.Response, size int64) {
 	}
 
 	// 尺寸和类型
-	var contentType = this.Header().Get("Content-Type")
+	var contentType = this.GetHeader("Content-Type")
 	if !this.compressionConfig.MatchResponse(contentType, size, filepath.Ext(this.req.Path()), this.req.Format) {
 		return
 	}
@@ -504,6 +616,11 @@ func (this *HTTPWriter) Header() http.Header {
 	return this.rawWriter.Header()
 }
 
+// GetHeader 读取Header值
+func (this *HTTPWriter) GetHeader(name string) string {
+	return this.Header().Get(name)
+}
+
 // DeleteHeader 删除Header
 func (this *HTTPWriter) DeleteHeader(name string) {
 	this.rawWriter.Header().Del(name)
@@ -777,18 +894,19 @@ func (this *HTTPWriter) Close() {
 		if this.isOk && this.cacheIsFinished {
 			// 对比缓存前后的Content-Length
 			var method = this.req.Method()
-			if method != http.MethodHead && this.StatusCode() != http.StatusNoContent {
-				var contentLengthString = this.Header().Get("Content-Length")
+			if method != http.MethodHead && this.StatusCode() != http.StatusNoContent && !this.isPartial {
+				var contentLengthString = this.GetHeader("Content-Length")
 				if len(contentLengthString) > 0 {
 					var contentLength = types.Int64(contentLengthString)
 					if contentLength != this.cacheWriter.BodySize() {
 						this.isOk = false
 						_ = this.cacheWriter.Discard()
+						this.cacheWriter = nil
 					}
 				}
 			}
 
-			if this.isOk {
+			if this.isOk && this.cacheWriter != nil {
 				err := this.cacheWriter.Close()
 				if err == nil {
 					var expiredAt = this.cacheWriter.ExpiredAt()
@@ -863,7 +981,7 @@ func (this *HTTPWriter) calculateStaleLife() int {
 		// 从Header中读取stale-if-error
 		var isDefinedInHeader = false
 		if staleConfig.SupportStaleIfErrorHeader {
-			var cacheControl = this.Header().Get("Cache-Control")
+			var cacheControl = this.GetHeader("Cache-Control")
 			var pieces = strings.Split(cacheControl, ",")
 			for _, piece := range pieces {
 				var eqIndex = strings.Index(piece, "=")
diff --git a/internal/utils/ranges/range.go b/internal/utils/ranges/range.go
new file mode 100644
index 0000000..c083228
--- /dev/null
+++ b/internal/utils/ranges/range.go
@@ -0,0 +1,53 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package rangeutils
+
+import "strconv"
+
+type Range [2]int64
+
+func NewRange(start int64, end int64) Range {
+	return [2]int64{start, end}
+}
+
+func (this Range) Start() int64 {
+	return this[0]
+}
+
+func (this Range) End() int64 {
+	return this[1]
+}
+
+func (this Range) Length() int64 {
+	return this[1] - this[0] + 1
+}
+
+func (this Range) Convert(total int64) (newRange Range, ok bool) {
+	if total <= 0 {
+		return this, false
+	}
+	if this[0] < 0 {
+		this[0] += total
+		if this[0] < 0 {
+			return this, false
+		}
+		this[1] = total - 1
+	}
+	if this[1] < 0 {
+		this[1] = total - 1
+	}
+	if this[1] > total-1 {
+		this[1] = total - 1
+	}
+	if this[0] > this[1] {
+		return this, false
+	}
+
+	return this, true
+}
+
+// ComposeContentRangeHeader 组合Content-Range Header
+// totalSize 可能是一个数字，也可能是一个星号（*）
+func (this Range) ComposeContentRangeHeader(totalSize string) string {
+	return "bytes " + strconv.FormatInt(this[0], 10) + "-" + strconv.FormatInt(this[1], 10) + "/" + totalSize
+}
diff --git a/internal/utils/ranges/range_test.go b/internal/utils/ranges/range_test.go
new file mode 100644
index 0000000..29df200
--- /dev/null
+++ b/internal/utils/ranges/range_test.go
@@ -0,0 +1,69 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package rangeutils_test
+
+import (
+	rangeutils "github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
+	"github.com/iwind/TeaGo/assert"
+	"testing"
+)
+
+func TestRange(t *testing.T) {
+	var a = assert.NewAssertion(t)
+
+	var r = rangeutils.NewRange(1, 100)
+	a.IsTrue(r.Start() == 1)
+	a.IsTrue(r.End() == 100)
+	t.Log("start:", r.Start(), "end:", r.End())
+}
+
+func TestRange_Convert(t *testing.T) {
+	var a = assert.NewAssertion(t)
+
+	{
+		var r = rangeutils.NewRange(1, 100)
+		newR, ok := r.Convert(200)
+		a.IsTrue(ok)
+		a.IsTrue(newR.Start() == 1)
+		a.IsTrue(newR.End() == 100)
+	}
+
+	{
+		var r = rangeutils.NewRange(1, 100)
+		newR, ok := r.Convert(50)
+		a.IsTrue(ok)
+		a.IsTrue(newR.Start() == 1)
+		a.IsTrue(newR.End() == 49)
+	}
+
+	{
+		var r = rangeutils.NewRange(1, 100)
+		_, ok := r.Convert(0)
+		a.IsFalse(ok)
+	}
+
+	{
+		var r = rangeutils.NewRange(-30, -1)
+		newR, ok := r.Convert(50)
+		a.IsTrue(ok)
+		a.IsTrue(newR.Start() == 50-30)
+		a.IsTrue(newR.End() == 49)
+	}
+
+	{
+		var r = rangeutils.NewRange(1000, 100)
+		_, ok := r.Convert(0)
+		a.IsFalse(ok)
+	}
+
+	{
+		var r = rangeutils.NewRange(50, 100)
+		_, ok := r.Convert(49)
+		a.IsFalse(ok)
+	}
+}
+
+func TestRange_ComposeContentRangeHeader(t *testing.T) {
+	var r = rangeutils.NewRange(1, 100)
+	t.Log(r.ComposeContentRangeHeader("1000"))
+}
diff --git a/internal/utils/readers/filter_reader.go b/internal/utils/readers/filter_reader.go
deleted file mode 100644
index 4e462e1..0000000
--- a/internal/utils/readers/filter_reader.go
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
-
-package readers
-
-import "io"
-
-type FilterFunc = func(p []byte, err error) error
-
-type FilterReader struct {
-	rawReader io.Reader
-	filters   []FilterFunc
-}
-
-func NewFilterReader(rawReader io.Reader) *FilterReader {
-	return &FilterReader{
-		rawReader: rawReader,
-	}
-}
-
-func (this *FilterReader) Add(filter FilterFunc) {
-	this.filters = append(this.filters, filter)
-}
-
-func (this *FilterReader) Read(p []byte) (n int, err error) {
-	n, err = this.rawReader.Read(p)
-	for _, filter := range this.filters {
-		filterErr := filter(p[:n], err)
-		if filterErr != nil {
-			err = filterErr
-			return
-		}
-	}
-	return
-}
diff --git a/internal/utils/readers/handlers.go b/internal/utils/readers/handlers.go
new file mode 100644
index 0000000..ac12e5e
--- /dev/null
+++ b/internal/utils/readers/handlers.go
@@ -0,0 +1,3 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package readers
diff --git a/internal/utils/readers/reader_base.go b/internal/utils/readers/reader_base.go
new file mode 100644
index 0000000..ee7bb38
--- /dev/null
+++ b/internal/utils/readers/reader_base.go
@@ -0,0 +1,6 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package readers
+
+type BaseReader struct {
+}
diff --git a/internal/utils/readers/bytes_counter_reader.go b/internal/utils/readers/reader_bytes_counter.go
similarity index 100%
rename from internal/utils/readers/bytes_counter_reader.go
rename to internal/utils/readers/reader_bytes_counter.go
diff --git a/internal/utils/readers/reader_closer_byte_ranges.go b/internal/utils/readers/reader_closer_byte_ranges.go
new file mode 100644
index 0000000..b28ccce
--- /dev/null
+++ b/internal/utils/readers/reader_closer_byte_ranges.go
@@ -0,0 +1,157 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package readers
+
+import (
+	"bytes"
+	"github.com/iwind/TeaGo/types"
+	"io"
+	"mime/multipart"
+	"net/textproto"
+	"regexp"
+	"strings"
+)
+
+type OnPartReadHandler func(start int64, end int64, total int64, data []byte, header textproto.MIMEHeader)
+
+var contentRangeRegexp = regexp.MustCompile(`^(\d+)-(\d+)/(\d+|\*)`)
+
+type ByteRangesReaderCloser struct {
+	BaseReader
+
+	rawReader io.ReadCloser
+	boundary  string
+
+	mReader *multipart.Reader
+	part    *multipart.Part
+
+	buf   *bytes.Buffer
+	isEOF bool
+
+	onPartReadHandler OnPartReadHandler
+	rangeStart        int64
+	rangeEnd          int64
+	total             int64
+
+	isStarted bool
+	nl        string
+}
+
+func NewByteRangesReaderCloser(reader io.ReadCloser, boundary string) *ByteRangesReaderCloser {
+	return &ByteRangesReaderCloser{
+		rawReader: reader,
+		mReader:   multipart.NewReader(reader, boundary),
+		boundary:  boundary,
+		buf:       &bytes.Buffer{},
+		nl:        "\r\n",
+	}
+}
+
+func (this *ByteRangesReaderCloser) Read(p []byte) (n int, err error) {
+	n, err = this.read(p)
+	return
+}
+
+func (this *ByteRangesReaderCloser) Close() error {
+	return this.rawReader.Close()
+}
+
+func (this *ByteRangesReaderCloser) OnPartRead(handler OnPartReadHandler) {
+	this.onPartReadHandler = handler
+}
+
+func (this *ByteRangesReaderCloser) read(p []byte) (n int, err error) {
+	// read from buffer
+	n, err = this.buf.Read(p)
+	if !this.isEOF {
+		err = nil
+	}
+	if n > 0 {
+		return
+	}
+	if this.isEOF {
+		return
+	}
+
+	if this.part == nil {
+		part, partErr := this.mReader.NextPart()
+		if partErr != nil {
+			if partErr == io.EOF {
+				this.buf.WriteString(this.nl + "--" + this.boundary + "--" + this.nl)
+				this.isEOF = true
+				n, _ = this.buf.Read(p)
+				return
+			}
+
+			return 0, partErr
+		}
+
+		if !this.isStarted {
+			this.isStarted = true
+			this.buf.WriteString("--" + this.boundary + this.nl)
+		} else {
+			this.buf.WriteString(this.nl + "--" + this.boundary + this.nl)
+		}
+
+		// Headers
+		var hasRange = false
+		for k, v := range part.Header {
+			for _, v1 := range v {
+				this.buf.WriteString(k + ": " + v1 + this.nl)
+
+				// parse range
+				if k == "Content-Range" {
+					var bytesPrefix = "bytes "
+					if strings.HasPrefix(v1, bytesPrefix) {
+						var r = v1[len(bytesPrefix):]
+						var matches = contentRangeRegexp.FindStringSubmatch(r)
+						if len(matches) > 2 {
+							var start = types.Int64(matches[1])
+							var end = types.Int64(matches[2])
+							var total int64 = 0
+							if matches[3] != "*" {
+								total = types.Int64(matches[3])
+							}
+							if start <= end {
+								hasRange = true
+								this.rangeStart = start
+								this.rangeEnd = end
+								this.total = total
+							}
+						}
+					}
+				}
+			}
+		}
+
+		if !hasRange {
+			this.rangeStart = -1
+			this.rangeEnd = -1
+		}
+
+		this.buf.WriteString(this.nl)
+		this.part = part
+
+		n, _ = this.buf.Read(p)
+		return
+	}
+
+	n, err = this.part.Read(p)
+
+	if this.onPartReadHandler != nil && n > 0 && this.rangeStart >= 0 && this.rangeEnd >= 0 {
+		this.onPartReadHandler(this.rangeStart, this.rangeEnd, this.total, p[:n], this.part.Header)
+		this.rangeStart += int64(n)
+	}
+
+	if err == io.EOF {
+		this.part = nil
+		err = nil
+
+		// 如果没有读取到内容，则直接跳到下一个Part
+		if n == 0 {
+			return this.read(p)
+		}
+	}
+
+	return
+}
diff --git a/internal/utils/readers/reader_closer_byte_ranges_test.go b/internal/utils/readers/reader_closer_byte_ranges_test.go
new file mode 100644
index 0000000..894ac21
--- /dev/null
+++ b/internal/utils/readers/reader_closer_byte_ranges_test.go
@@ -0,0 +1,52 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package readers_test
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/TeaOSLab/EdgeNode/internal/utils/readers"
+	"io"
+	"io/ioutil"
+	"net/textproto"
+	"testing"
+)
+
+func TestNewByteRangesReader(t *testing.T) {
+	var boundary = "7143cd51d2ee12a1"
+	var dashBoundary = "--" + boundary
+	var b = bytes.NewReader([]byte(dashBoundary + "\r\nContent-Range: bytes 0-4/36\r\nContent-Type: text/plain\r\n\r\n01234\r\n" + dashBoundary + "\r\nContent-Range: bytes 5-9/36\r\nContent-Type: text/plain\r\n\r\n56789\r\n--" + boundary + "\r\nContent-Range: bytes 10-12/36\r\nContent-Type: text/plain\r\n\r\nabc\r\n" + dashBoundary + "--\r\n"))
+
+	var reader = readers.NewByteRangesReaderCloser(ioutil.NopCloser(b), boundary)
+	var p = make([]byte, 16)
+	for {
+		n, err := reader.Read(p)
+		if n > 0 {
+			fmt.Print(string(p[:n]))
+		}
+		if err != nil {
+			if err != io.EOF {
+				t.Fatal(err)
+			}
+			break
+		}
+	}
+}
+
+func TestByteRangesReader_OnPartRead(t *testing.T) {
+	var boundary = "7143cd51d2ee12a1"
+	var dashBoundary = "--" + boundary
+	var b = bytes.NewReader([]byte(dashBoundary + "\r\nContent-Range: bytes 0-4/36\r\nContent-Type: text/plain\r\n\r\n01234\r\n" + dashBoundary + "\r\nContent-Range: bytes 5-9/36\r\nContent-Type: text/plain\r\n\r\n56789\r\n--" + boundary + "\r\nContent-Range: bytes 10-12/36\r\nContent-Type: text/plain\r\n\r\nabc\r\n" + dashBoundary + "--\r\n"))
+
+	var reader = readers.NewByteRangesReaderCloser(ioutil.NopCloser(b), boundary)
+	reader.OnPartRead(func(start int64, end int64, total int64, data []byte, header textproto.MIMEHeader) {
+		t.Log(start, "-", end, "/", total, string(data))
+	})
+	var p = make([]byte, 3)
+	for {
+		_, err := reader.Read(p)
+		if err != nil {
+			break
+		}
+	}
+}
diff --git a/internal/utils/readers/reader_closer_filter.go b/internal/utils/readers/reader_closer_filter.go
new file mode 100644
index 0000000..a4a0cd0
--- /dev/null
+++ b/internal/utils/readers/reader_closer_filter.go
@@ -0,0 +1,42 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package readers
+
+import "io"
+
+type FilterFunc = func(p []byte, err error) error
+
+type FilterReaderCloser struct {
+	rawReader io.Reader
+	filters   []FilterFunc
+}
+
+func NewFilterReaderCloser(rawReader io.Reader) *FilterReaderCloser {
+	return &FilterReaderCloser{
+		rawReader: rawReader,
+	}
+}
+
+func (this *FilterReaderCloser) Add(filter FilterFunc) {
+	this.filters = append(this.filters, filter)
+}
+
+func (this *FilterReaderCloser) Read(p []byte) (n int, err error) {
+	n, err = this.rawReader.Read(p)
+	for _, filter := range this.filters {
+		filterErr := filter(p[:n], err)
+		if (err == nil || err != io.EOF) && filterErr != nil {
+			err = filterErr
+			return
+		}
+	}
+	return
+}
+
+func (this *FilterReaderCloser) Close() error {
+	closer, ok := this.rawReader.(io.Closer)
+	if ok {
+		return closer.Close()
+	}
+	return nil
+}
diff --git a/internal/utils/readers/filter_reader_test.go b/internal/utils/readers/reader_closer_filter_test.go
similarity index 90%
rename from internal/utils/readers/filter_reader_test.go
rename to internal/utils/readers/reader_closer_filter_test.go
index 87808b2..eaa41d5 100644
--- a/internal/utils/readers/filter_reader_test.go
+++ b/internal/utils/readers/reader_closer_filter_test.go
@@ -10,7 +10,7 @@ import (
 )
 
 func TestNewFilterReader(t *testing.T) {
-	var reader = readers.NewFilterReader(bytes.NewBufferString("0123456789"))
+	var reader = readers.NewFilterReaderCloser(bytes.NewBufferString("0123456789"))
 	reader.Add(func(p []byte, err error) error {
 		t.Log("filter1:", string(p), err)
 		return nil
diff --git a/internal/utils/readers/tee_reader_closer.go b/internal/utils/readers/reader_closer_tee.go
similarity index 100%
rename from internal/utils/readers/tee_reader_closer.go
rename to internal/utils/readers/reader_closer_tee.go
diff --git a/internal/utils/readers/tee_reader.go b/internal/utils/readers/reader_tee.go
similarity index 100%
rename from internal/utils/readers/tee_reader.go
rename to internal/utils/readers/reader_tee.go
diff --git a/internal/utils/writers/bytes_counter_writer.go b/internal/utils/writers/writer_bytes_counter.go
similarity index 100%
rename from internal/utils/writers/bytes_counter_writer.go
rename to internal/utils/writers/writer_bytes_counter.go
diff --git a/internal/utils/writers/tee_writer_closer.go b/internal/utils/writers/writer_closer_tee.go
similarity index 98%
rename from internal/utils/writers/tee_writer_closer.go
rename to internal/utils/writers/writer_closer_tee.go
index b5d908b..b14092d 100644
--- a/internal/utils/writers/tee_writer_closer.go
+++ b/internal/utils/writers/writer_closer_tee.go
@@ -2,7 +2,9 @@
 
 package writers
 
-import "io"
+import (
+	"io"
+)
 
 type TeeWriterCloser struct {
 	primaryW   io.WriteCloser
diff --git a/internal/utils/writers/rate_limit_writer.go b/internal/utils/writers/writer_rate_limit.go
similarity index 100%
rename from internal/utils/writers/rate_limit_writer.go
rename to internal/utils/writers/writer_rate_limit.go
diff --git a/internal/utils/writers/rate_limit_writer_test.go b/internal/utils/writers/writer_rate_limit_test.go
similarity index 100%
rename from internal/utils/writers/rate_limit_writer_test.go
rename to internal/utils/writers/writer_rate_limit_test.go
diff --git a/internal/waf/utils/utils_test.go b/internal/waf/utils/utils_test.go
index 4ee83bd..d5a0612 100644
--- a/internal/waf/utils/utils_test.go
+++ b/internal/waf/utils/utils_test.go
@@ -52,8 +52,9 @@ func TestMatchBytesCache_WithoutCache(t *testing.T) {
 func BenchmarkMatchStringCache(b *testing.B) {
 	runtime.GOMAXPROCS(1)
 
-	data := strings.Repeat("HELLO", 512)
-	regex := re.MustCompile(`(?iU)\b(eval|system|exec|execute|passthru|shell_exec|phpinfo)\b`)
+	var data = strings.Repeat("HELLO", 512)
+	var regex = re.MustCompile(`(?iU)\b(eval|system|exec|execute|passthru|shell_exec|phpinfo)\b`)
+	//b.Log(regex.Keywords())
 	_ = MatchStringCache(regex, data)
 
 	for i := 0; i < b.N; i++ {