diff --git a/cmd/main.go b/cmd/main.go
new file mode 100644
index 00000000..a25fec46
--- /dev/null
+++ b/cmd/main.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"github.com/monkeyWie/gopeed-core/download"
+	"github.com/monkeyWie/gopeed-core/download/common"
+	"github.com/monkeyWie/gopeed-core/download/http"
+)
+
+func main() {
+	downloader := buildDownloader()
+	res, err := downloader.Resolve(&common.Request{
+		URL: "http://192.168.200.163:8088/docker-compose",
+	})
+	if err != nil {
+		panic(err)
+	}
+	err = downloader.Create(res, &common.Options{
+		Path:        "E:\\test\\gopeed\\http",
+		Connections: 4,
+	})
+	if err != nil {
+		panic(err)
+	}
+}
+
+func buildDownloader() *download.Downloader {
+	return download.NewDownloader(&http.Fetcher{BaseFetcher: &common.BaseFetcher{}})
+}
diff --git a/download/common/controller.go b/download/common/controller.go
index b02b29f9..09ac5e89 100644
--- a/download/common/controller.go
+++ b/download/common/controller.go
@@ -48,6 +48,10 @@ type Process interface {
 	Delete() error
 }
 
+type FileCreator interface {
+	Create(name string, size int64) (file *os.File, err error)
+}
+
 type Controller struct {
 	Files map[string]*os.File
 }
diff --git a/download/file_allocate/file_allocate.go b/download/file_allocate/file_allocate.go
new file mode 100644
index 00000000..b87370a0
--- /dev/null
+++ b/download/file_allocate/file_allocate.go
@@ -0,0 +1,18 @@
+package file_allocate
+
+import (
+	"os"
+)
+
+type FileAllocate interface {
+	Allocate(name string, size int64) (file *os.File, err error)
+}
+
+type DefaultFileAllocator struct {
+}
+
+func (p *DefaultFileAllocator) Allocate(name string, size int64) (file *os.File, err error) {
+	err = os.Truncate(name, size)
+	file, err = os.OpenFile(name, os.O_RDWR, 0644)
+	return
+}
diff --git a/download/file_allocate/pre_file_allocate.go b/download/file_allocate/pre_file_allocate.go
new file mode 100644
index 00000000..8ecba899
--- /dev/null
+++ b/download/file_allocate/pre_file_allocate.go
@@ -0,0 +1,12 @@
+package file_allocate
+
+import "os"
+
+type PreFileAllocator struct {
+}
+
+func (p *PreFileAllocator) Allocate(name string, size int64) (file *os.File, err error) {
+	err = os.Truncate(name, size)
+	file, err = os.OpenFile(name, os.O_RDWR, 0644)
+	return
+}
diff --git a/go.sum b/go.sum
index 5dac46a6..b824d919 100644
--- a/go.sum
+++ b/go.sum
@@ -48,6 +48,7 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd h1:xhmwyvizuTgC2qz7ZlMluP20uW+C3Rm0FD/WLDX8884=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
diff --git a/main.go b/main.go
index e4e48729..38bed1ca 100644
--- a/main.go
+++ b/main.go
@@ -1,23 +1,88 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
-	"github.com/monkeyWie/gopeed-core/protocol/http"
+	"os"
+	"syscall"
+	"time"
+)
+
+var (
+	modkernel32          = syscall.NewLazyDLL("kernel32.dll")
+	procSetFileValidData = modkernel32.NewProc("SetFileValidData")
 )
 
 func main() {
-	request := &http.Request{
-		Method: "get",
-		URL:    "http://github.com/proxyee-down-org/proxyee-down/releases/download/3.4/proxyee-down-main.jar",
-		Header: map[string]string{
-			"Host":            "github.com",
-			"User-Agent":      "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36",
-			"Accept":          "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
-			"Referer":         "http://github.com/proxyee-down-org/proxyee-down/releases",
-			"Accept-Encoding": "gzip, deflate, br",
-			"Accept-Language": "zh-CN,zh;q=0.9,en;q=0.8",
-		},
+	var err error
+	name := "d:/test.data"
+	var size int64 = 1024 * 1024 * 1024 * 4
+
+	err = os.Truncate(name, size)
+	if err != nil {
+		panic(err)
 	}
-	got, _ := http.Resolve(request)
-	fmt.Println(got)
+
+	var hwnd HWND
+
+	err = ShellExecute(hwnd,
+		"runas",
+		"fsutil.exe",
+		"file setValidData d:\\test.data 4294967296",
+		"d:\\",
+		syscall.SW_HIDE)
+
+	//err = exec.Command("fsutil", "file", "setValidData", "d:\\test.data", "4294967296").Run()
+	if err != nil {
+		panic(err)
+	}
+
+	file, _ := os.OpenFile(name, os.O_RDWR, 0644)
+	defer os.Remove(name)
+	defer file.Close()
+	defer func() {
+		reader := bufio.NewReader(os.Stdin)
+		fmt.Println("输入回车结束")
+		reader.ReadString('\n')
+	}()
+
+	/*process, err := syscall.GetCurrentProcess()
+	if err != nil {
+		panic(err)
+	}
+	var token syscall.Token
+	err = syscall.OpenProcessToken(process, syscall.TOKEN_ADJUST_PRIVILEGES|syscall.TOKEN_QUERY, &token)
+	if err != nil {
+		panic(err)
+	}
+
+
+	_, _, en := syscall.Syscall(procSetFileValidData.Addr(), 2, file.Fd(), uintptr(size), 0)
+	if en != 0 {
+		fmt.Println(en)
+		return
+	}*/
+
+	buf := []byte{1, 2, 3, 4, 5, 6, 7, 8}
+	var (
+		tm int64
+	)
+
+	tm = time.Now().UnixNano()
+	_, err = file.WriteAt(buf, 0)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("write use:%d\n", toMill(time.Now().UnixNano()-tm))
+
+	tm = time.Now().UnixNano()
+	_, err = file.WriteAt(buf, 1024*1024*1024*2)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("write use:%d\n", toMill(time.Now().UnixNano()-tm))
+}
+
+func toMill(nano int64) int64 {
+	return nano / int64(time.Millisecond)
 }