multipart/form-data 顾名思义可以上传多个form-data 并且用分隔符进行分割，多用于文件上传
1. http multipart/form-data 请求样例
POST /handle HTTP/1.1
Host: localhost:8080
Connection: keep-alive
Content-Length: 182537
Cache-Control: max-age=0
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryWdDAe6hxfa4nl2Ig
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*
r.ParseMultipartForm(128)
fmt.Println("r.Form: ",r.Form)
fmt.Println("r.PostForm: ",r.PostForm)
fmt.Println("r.MultiPartForm:",r.MultipartForm)
getFormData(r.MultipartForm)
}
//通过MultipartReader
func getMultiPart2(r *http.Request)() {
mr,err := r.MultipartReader()
if err != nil{
fmt.Println("r.MultipartReader() err,",err)
return
}
form ,_ := mr.ReadForm(128)
getFormData(form)
}
//字节解析multi-part
func getMultiPart3(r *http.Request)() {
mr,err := r.MultipartReader()
if err != nil{
fmt.Println("r.MultipartReader() err,",err)
return
}
for{
p ,err := mr.NextPart()
if err == io.EOF{
break
}
if err != nil{
fmt.Println("mr.NextPart() err,",err)
break
}
fmt.Println("part header:",p.Header)
formName := p.FormName()
fileName := p.FileName()
if formName != "" && fileName == ""{
formValue,_:= ioutil.ReadAll(p)
fmt.Printf("formName:%s,formValue:%sn",formName,formValue)
}
if fileName != "" {
fileData,_:=ioutil.ReadAll(p)
fmt.Printf("fileName:%s,filedata:%sn",fileName,fileData)
}
fmt.Println()
}
}
func getFormData(form *multipart.Form) {
//获取 multi-part/form body中的form value
for k,v := range form.Value{
fmt.Println("value,k,v = ",k,",",v)
}
fmt.Println()
//获取 multi-part/form中的文件数据
for _,v := range form.File {
for i:=0 ;i < len(v);i++{
fmt.Println("file part ",i,"-->")
fmt.Println("fileName :",v[i].Filename)
fmt.Println("part-header:",v[i].Header)
f,_ := v[i].Open()
buf,_:= ioutil.ReadAll(f)
fmt.Println("file-content",string(buf))
fmt.Println()
}
}
}
