refactor: package

pkg/test/httptest.go

@@ -0,0 +1,137 @@
+package test
+
+import (
+	"fmt"
+	"io"
+	"math/rand"
+	"net"
+	"net/http"
+	"os"
+)
+
+const (
+	BuildName = "build.data"
+	BuildSize = 200 * 1024 * 1024
+	Dir       = "./"
+	BuildFile = Dir + BuildName
+
+	DownloadName = "download.data"
+	DownloadFile = Dir + DownloadName
+)
+
+func StartTestFileServer() net.Listener {
+	return startTestServer(func() http.Handler {
+		return http.FileServer(http.Dir(Dir))
+	})
+}
+
+func StartTestChunkedServer() net.Listener {
+	return startTestServer(func() http.Handler {
+		mux := http.NewServeMux()
+		mux.HandleFunc("/"+BuildName, func(writer http.ResponseWriter, request *http.Request) {
+			file, err := os.Open(BuildFile)
+			if err != nil {
+				panic(err)
+			}
+			defer file.Close()
+			io.Copy(writer, file)
+		})
+		return mux
+	})
+}
+
+func StartTestRetryServer() net.Listener {
+	counter := 0
+	return startTestServer(func() http.Handler {
+		mux := http.NewServeMux()
+		mux.HandleFunc("/"+BuildName, func(writer http.ResponseWriter, request *http.Request) {
+			counter++
+			if counter != 1 && counter < 5 {
+				writer.WriteHeader(500)
+				return
+			}
+			file, err := os.Open(BuildFile)
+			if err != nil {
+				panic(err)
+			}
+			defer file.Close()
+			io.Copy(writer, file)
+		})
+		return mux
+	})
+}
+
+func StartTestErrorServer() net.Listener {
+	counter := 0
+	return startTestServer(func() http.Handler {
+		mux := http.NewServeMux()
+		mux.HandleFunc("/"+BuildName, func(writer http.ResponseWriter, request *http.Request) {
+			counter++
+			if counter != 1 {
+				writer.WriteHeader(500)
+				return
+			}
+		})
+		return mux
+	})
+}
+
+func startTestServer(serverHandle func() http.Handler) net.Listener {
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		panic(err)
+	}
+	file, err := os.Create(BuildFile)
+	if err != nil {
+		panic(err)
+	}
+	// 随机生成一个文件
+	l := int64(8192)
+	buf := make([]byte, l)
+	size := int64(0)
+	for {
+		_, err := rand.Read(buf)
+		if err != nil {
+			panic(err)
+		}
+		if size+l >= BuildSize {
+			file.WriteAt(buf[0:BuildSize-size], size)
+			break
+		}
+		file.WriteAt(buf, size)
+		size += l
+	}
+	server := &http.Server{}
+	server.Handler = serverHandle()
+	go server.Serve(listener)
+
+	return &delFileListener{
+		File:     file,
+		Listener: listener,
+	}
+}
+
+type delFileListener struct {
+	*os.File
+	net.Listener
+}
+
+func (c *delFileListener) Close() error {
+	defer func() {
+		c.File.Close()
+		if err := ifExistAndRemove(c.File.Name()); err != nil {
+			fmt.Println(err)
+		}
+		if err := ifExistAndRemove(DownloadFile); err != nil {
+			fmt.Println(err)
+		}
+	}()
+	return c.Listener.Close()
+}
+
+func ifExistAndRemove(name string) error {
+	if _, err := os.Stat(name); !os.IsNotExist(err) {
+		return os.Remove(name)
+	}
+	return nil
+}

pkg/test/util.go

@@ -0,0 +1,32 @@
+package test
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"encoding/json"
+	"io"
+	"os"
+)
+
+func FileMd5(filePath string) string {
+	file, err := os.Open(filePath)
+	if err != nil {
+		panic(err)
+	}
+	// Tell the program to call the following function when the current function returns
+	defer file.Close()
+
+	// Open a new hash interface to write to
+	hash := md5.New()
+
+	// Copy the file in the hash interface and check for any error
+	if _, err := io.Copy(hash, file); err != nil {
+		return ""
+	}
+	return hex.EncodeToString(hash.Sum(nil))
+}
+
+func ToJson(v interface{}) string {
+	buf, _ := json.Marshal(v)
+	return string(buf)
+}