方法名 | 描述 |
---|---|
(r *Request) ParseForm() error |
判断是否解析传参时出错 |
(r *Request) FormValue(key string) string |
接收指定key的参数值 |
// 服务端代码
package main
import (
"fmt"
"net/http"
)
func main() {
http.HandleFunc("/login", login)
_ = http.ListenAndServe(":8888", nil)
}
func login(w http.ResponseWriter, r *http.Request) {
// 判断参数是否是Get请求,并且参数解析正常
if r.Method == "GET" && r.ParseForm() == nil {
// 接收参数
userName := r.FormValue("userName")
fmt.Printf("userName: %s \n", userName)
passWord := r.FormValue("passWord")
fmt.Printf("passWord: %s \n", passWord)
if userName == "" || passWord == "" {
w.Write([]byte("用户名或密码不能为空"))
}
if userName == "admin" && passWord == "1234" {
w.Write([]byte("登录成功!"))
} else {
w.Write([]byte("用户名或密码错误!"))
}
}
}
Content-Type=application/x-www-form-urlencoded
Content-Type=multipart/form-data
// 服务端代码
package main
import (
"fmt"
"net/http"
)
func main() {
http.HandleFunc("/login", login)
_ = http.ListenAndServe(":8888", nil)
}
// 登录
func login(w http.ResponseWriter, r *http.Request) {
if r.Method == "POST" && r.ParseForm() == nil {
// 接收post参数
userName := r.PostFormValue("userName")
fmt.Printf("userName: %s \n", userName)
passWord := r.PostFormValue("passWord")
fmt.Printf("passWord: %s \n", passWord)
if userName == "" || passWord == "" {
w.Write([]byte("用户名或密码不能为空"))
return
}
if userName == "admin" && passWord == "1234" {
w.Write([]byte("登录成功!"))
return
}
w.Write([]byte("用户名或密码错误!"))
} else {
w.Write([]byte("当前接口,仅支持POST请求!"))
}
return
}
package main
import (
"fmt"
"io"
"net/http"
"os"
"path"
)
func main() {
http.HandleFunc("/upload", upload)
_ = http.ListenAndServe(":8888", nil)
}
// 上传文件
func upload(w http.ResponseWriter, r *http.Request) {
if r.Method == "POST" && r.ParseForm() == nil {
// 接收上传文件的参数
formFile, fileHeader, err := r.FormFile("file")
if formFile == nil {
http.Error(w,"上传的文件不能为空!",http.StatusInternalServerError)
return
}
if err != nil {
http.Error(w,err.Error(),http.StatusInternalServerError)
return
}
// 延迟关闭文件
defer formFile.Close()
// 获取上传文件的名称
filename := fileHeader.Filename
fmt.Printf("文件名称: %s \n",filename)
// 获取文件的后缀
ext := path.Ext(filename)
fmt.Printf("文件后缀: %s \n",ext)
// 创建新文件,如果同名文件存在,则会清空
pathName := "public/img"
if !pathExist(pathName) {
err := os.MkdirAll(pathName, os.ModePerm)
if err != nil {
http.Error(w,"创建目录失败: "+ err.Error(),http.StatusInternalServerError)
return
}
}
newFile, err := os.Create(pathName +"/"+ filename)
if err != nil {
http.Error(w,"创建文件失败: "+ err.Error(),http.StatusInternalServerError)
return
}
defer newFile.Close()
// 将formFile复制到newFile,从而实现上传的功能
written, err := io.Copy(newFile, formFile)
fmt.Printf("上传结果: %d \n",written)
if err != nil {
http.Error(w,"文件上传失败: "+ err.Error(),http.StatusInternalServerError)
return
}
w.Write([]byte("文件上传成功!"))
}
return
}
// 判断目录是否存在
func pathExist(path string) bool {
_, err := os.Stat(path)
if err != nil {
if os.IsExist(err) {
return true
}
return false
}
return true
}
Cookie
是一个结构体,其中有Cookie
的名和值、domain
、过期时间等信息,具体定义方式如下所示:
type Cookie struct {
Name string // 变量名
Value string // 变量值
Path string // 设置访问哪些路径,应该携带这个cookie,不设置则代表所有
Domain string // 设置访问域名范围的主机时,应该携带这个cookie,不设置则代表所有
Expires time.Time // 一个时间值,代表什么时候过期
RawExpires string // for reading cookies only
MaxAge int //用来设置过期,为负数或等于0表示立即过期,大于0表示过多少秒之后过期
Secure bool
HttpOnly bool
SameSite SameSite
Raw string
Unparsed []string // Raw text of unparsed attribute-value pairs
}
package main
import (
"encoding/base64"
"fmt"
"net/http"
)
func main() {
http.HandleFunc("/setCookie", setCookie)
http.HandleFunc("/getCookie", getCookie)
_ = http.ListenAndServe(":8888", nil)
}
// 设置cookie中的值
func setCookie(w http.ResponseWriter, r *http.Request) {
cookie1 := http.Cookie{
Name: "uid",
Value: "10001",
MaxAge: 3600, //一小时后过期
}
name := base64.URLEncoding.EncodeToString([]byte("张三"))
cookie2 := http.Cookie{
Name: "name",
Value: name,
MaxAge: 3600, //一小时后过期
}
http.SetCookie(w,&cookie1)
http.SetCookie(w,&cookie2)
w.Write([]byte("cookie已设置!"))
}
// 获取cookie中的值
func getCookie(w http.ResponseWriter, r *http.Request) {
key := r.FormValue("key")
if key == "" {
http.Error(w,"key不能为空!",http.StatusInternalServerError)
return
}
cookie, err := r.Cookie(key)
if err != nil {
http.Error(w,"获取失败: " + err.Error(),http.StatusInternalServerError)
return
}
result := make([]string,2)
result[0] = cookie.Value
decodeString, _ := base64.URLEncoding.DecodeString(cookie.Value)
result[1] = string(decodeString)
fmt.Println(result)
w.Write([]byte("cookie已获取!"))
}
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