go web 第二天 学习笔记之文件上传
package main
import (
"crypto/md5"
"fmt"
"html/template"
"io"
"log"
"net/http"
"os"
"strconv"
"strings"
"time"
)
func sayHelloName(w http.ResponseWriter, r *http.Request) {
r.ParseForm() //解析函数，默认是不会解析的
fmt.Println(r.Form) //这些信息是输出到服务器端的打印信息
fmt.Println("path", r.URL.Path)
fmt.Println("scheme", r.URL.Scheme)
fmt.Println(r.Form["url_long"])
for k, v := range r.Form {
fmt.Println("key:", k)
fmt.Println("val:", strings.Join(v, "v"))
}
fmt.Fprintf(w, "Hello astaxie") //这个写入到w的是输出到客户端的
}
func login(w http.ResponseWriter, r *http.Request) {
fmt.Println("login method:", r.Method) //获取请求的方法
if r.Method == "GET" {
t, e := template.ParseFiles("login.gtpl")
crutime := time.Now().Unix()
h := md5.New()
io.WriteString(h, strconv.FormatInt(crutime, 10))
token := fmt.Sprintf("%x", h.Sum(nil))
fmt.Println("token:", token)
//t, e := template.ParseFiles("login.gtpl")
if e != nil {
log.Fatal(e)
}
t.Execute(w, token)
} else {
r.ParseForm()
//请求的是登录数据，那么执行登录的逻辑判断
token := r.Form.Get("token")
if token != "" {
} else {
}
fmt.Println("username len:", len(r.Form["username"][0]))
fmt.Println("username:", template.HTMLEscapeString(r.Form.Get("username"))) //输出到服务端
fmt.Println("password", template.HTMLEscapeString(r.Form.Get("password")))
template.HTMLEscape(w, []byte(r.Form.Get("username"))) //输出到客户端
}
}
func upload(w http.ResponseWriter, r *http.Request) {
fmt.Println("method", r.Method) // 获取请求方法
if r.Method == "GET" {
crutime := time.Now().Unix()
h := md5.New()
io.WriteString(h, strconv.FormatInt(crutime, 10))
token := fmt.Sprintf("%x", h.Sum(nil))
t, _ := template.ParseFiles("upload.gtpl")
t.Execute(w, token)
} else {
r.ParseMultipartForm(32 << 20)
file, handler, err := r.FormFile("uploadfile")
if err != nil {
fmt.Println(err)
return
}
defer file.Close()
fmt.Fprintf(w, "%v", handler.Header)
f, err := os.OpenFile("./test/"+handler.Filename, os.O_WRONLY|os.O_CREATE, 0666)
if err != nil {
fmt.Println(err)
return
}
defer f.Close()
io.Copy(f, file)
}
}
func main() {
http.HandleFunc("/", sayHelloName) //设置访问的路由
http.HandleFunc("/login", login) //设置访问的路由
http.HandleFunc("/upload", upload) //设置访问的路由
err := http.ListenAndServe(":9090", nil) //设置监听的端口
if err != nil {
log.Fatal("ListenAndServe", err)
}
}upload.gtpl
<html> <head> <title>文件上传</title> </head> <body> <form enctype="multipart/form-data" action="http://127.0.0.1:9090/upload" method="post"> <input type="file" name="uploadfile"/> <input type="hidden" name="token" value="{{.}}"/> <input type="submit" value="upload"/> </form> </body> </html>
如果当前目录下没有test文件夹，不会自动创建。需要手动创建
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