1.获取GET参数
1.1 办法列表
| 办法名 | 形容 |
|---|---|
(r *Request) ParseForm() error | 判断是否解析传参时出错 |
(r *Request) FormValue(key string) string | 接管指定key的参数值 |
1.2 应用示例
// 服务端代码package mainimport ( "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申请，并且参数解析失常 if r.Method == "GET" && r.ParseForm() == nil { // 接管参数 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("用户名或明码不能为空")) } if userName == "admin" && passWord == "1234" { w.Write([]byte("登录胜利！")) } else { w.Write([]byte("用户名或明码谬误！")) } }}2.获取POST参数
2.1 接管POST参数分以下两种状况
- 一般的Post表单:
Content-Type=application/x-www-form-urlencoded - 有文件上传的Post表单:
Content-Type=multipart/form-data
2.2 一般的Post表单(r.PostFormValue)
// 服务端代码package mainimport ( "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 { // 接管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("用户名或明码不能为空")) return } if userName == "admin" && passWord == "1234" { w.Write([]byte("登录胜利！")) return } w.Write([]byte("用户名或明码谬误！")) } else { w.Write([]byte("以后接口，仅反对POST申请！")) } return}2.3 有文件上传的Post表单(r.FormFile)
package mainimport ( "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 { // 接管上传文件的参数 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 } // 提早敞开文件 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) // 创立新文件,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,"创立目录失败: "+ err.Error(),http.StatusInternalServerError) return } } newFile, err := os.Create(pathName +"/"+ filename) if err != nil { http.Error(w,"创立文件失败: "+ err.Error(),http.StatusInternalServerError) return } defer newFile.Close() // 将formFile复制到newFile,从而实现上传的性能 written, err := io.Copy(newFile, formFile) fmt.Printf("上传后果: %d \n",written) if err != nil { http.Error(w,"文件上传失败: "+ err.Error(),http.StatusInternalServerError) return } w.Write([]byte("文件上传胜利!")) } 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}运行后果
3.获取Cookie中的值
3.1 cookie的数据结构
Cookie是一个构造体,其中有Cookie的名和值、domain、过期工夫等信息,具体定义形式如下所示:
type Cookie struct { Name string // 变量名 Value string // 变量值 Path string // 设置拜访哪些门路,应该携带这个cookie,不设置则代表所有 Domain string // 设置拜访域名范畴的主机时,应该携带这个cookie,不设置则代表所有 Expires time.Time // 一个工夫值，代表什么时候过期 RawExpires string // for reading cookies only MaxAge int //用来设置过期，为正数或等于0示意立刻过期，大于0示意过多少秒之后过期 Secure bool HttpOnly bool SameSite SameSite Raw string Unparsed []string // Raw text of unparsed attribute-value pairs}3.2 应用示例
package mainimport ( "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!"))}微信搜寻关注【猿码记】查看更多文章。
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