initial thai translation

th/code/src/apps/ch.4.5/client_upload/main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"mime/multipart"
+	"net/http"
+	"os"
+)
+
+func checkError(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+func postFile(filename string, targetUrl string) {
+	bodyBuf := &bytes.Buffer{}
+	bodyWriter := multipart.NewWriter(bodyBuf)
+	fileWriter, err := bodyWriter.CreateFormFile("uploadfile", filename)
+	checkError(err)
+
+	fh, err := os.Open(filename)
+	checkError(err)
+
+	_, err = io.Copy(fileWriter, fh)
+	checkError(err)
+
+	contentType := bodyWriter.FormDataContentType()
+	bodyWriter.Close()
+	resp, err := http.Post(targetUrl, contentType, bodyBuf)
+	checkError(err)
+
+	defer resp.Body.Close()
+	resp_body, err := ioutil.ReadAll(resp.Body)
+	checkError(err)
+
+	fmt.Println(resp.Status)
+	fmt.Println(string(resp_body))
+}
+func main() {
+	target_url := "http://localhost:9090/upload"
+	filename := "../file.txt"
+	postFile(filename, target_url)
+}