134 lines
2.9 KiB
Go
134 lines
2.9 KiB
Go
package ctx
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import (
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"os"
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"path/filepath"
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"ems.agt/lib/core/vo"
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"github.com/gorilla/mux"
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)
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// Param 地址栏参数{id}
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func Param(r *http.Request, key string) string {
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vars := mux.Vars(r)
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v, ok := vars[key]
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if ok {
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return v
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}
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return ""
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}
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// GetQuery 查询参数
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func GetQuery(r *http.Request, key string) string {
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return r.URL.Query().Get(key)
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}
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// QueryMap 查询参数转换Map
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func QueryMap(r *http.Request) map[string]any {
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queryValues := r.URL.Query()
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queryParams := make(map[string]any)
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for key, values := range queryValues {
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queryParams[key] = values[0]
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}
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return queryParams
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}
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// 读取json请求结构团体
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func ShouldBindJSON(r *http.Request, args any) error {
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body, err := io.ReadAll(io.LimitReader(r.Body, 1<<20)) // 设置较大的长度，例如 1<<20 (1MB)
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if err != nil {
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return err
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}
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err = json.Unmarshal(body, args)
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return err
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}
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// JSON 相应json数据
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func JSON(w http.ResponseWriter, code int, data any) {
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w.Header().Set("Content-Type", "application/json;charset=UTF-8")
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response, err := json.Marshal(data)
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if err != nil {
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w.WriteHeader(500)
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w.Write([]byte(err.Error()))
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} else {
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w.WriteHeader(code)
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w.Write(response)
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}
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}
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// 将文件导出到外部下载
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func FileAttachment(w http.ResponseWriter, r *http.Request, filepath, filename string) {
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w.Header().Set("Content-Disposition", `attachment; filename=`+url.QueryEscape(filename))
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w.Header().Set("Content-Type", "application/octet-stream")
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http.ServeFile(w, r, filepath)
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}
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// 将文件上传保存到指定目录
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// file, handler, err := r.FormFile("file")
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// SaveUploadedFile uploads the form file to specific dst.
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func SaveUploadedFile(r *http.Request, dst string) error {
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// 解析请求中的文件
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_, handler, err := r.FormFile("file")
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if err != nil {
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return err
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}
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src, err := handler.Open()
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if err != nil {
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return err
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}
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defer src.Close()
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if err = os.MkdirAll(filepath.Dir(dst), 0750); err != nil {
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return err
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}
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out, err := os.Create(dst)
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if err != nil {
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return err
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}
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defer out.Close()
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_, err = io.Copy(out, src)
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return err
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}
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/// ==== 登录用户信息， 通过中间件后预置入
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// 定义自定义类型作为键
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type ContextKey string
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// LoginUser 登录用户信息需要Authorize中间件
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func LoginUser(r *http.Request) (vo.LoginUser, error) {
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// 上下文
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v := r.Context().Value(ContextKey("LoginUser"))
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if v != nil {
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return v.(vo.LoginUser), nil
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}
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return vo.LoginUser{}, fmt.Errorf("无用户信息")
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}
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// LoginUserToUserID 登录用户信息-用户ID
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func LoginUserToUserID(r *http.Request) string {
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loginUser, err := LoginUser(r)
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if err != nil {
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return ""
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}
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return loginUser.UserID
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}
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// LoginUserToUserName 登录用户信息-用户名称
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func LoginUserToUserName(r *http.Request) string {
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loginUser, err := LoginUser(r)
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if err != nil {
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return ""
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}
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return loginUser.UserName
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}
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