新增 Web 浏览端(Go+Vue 报表系统)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/backend/internal/handlers/auth.go

@@ -0,0 +1,90 @@
+package handlers
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+
+	"trade/web/internal/auth"
+	"trade/web/internal/middleware"
+	"trade/web/internal/store"
+)
+
+type loginReq struct {
+	Username string `json:"username"`
+	Password string `json:"password"`
+}
+
+type loginResp struct {
+	Token string         `json:"token"`
+	User  publicUserView `json:"user"`
+}
+
+type publicUserView struct {
+	ID       int64  `json:"id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+}
+
+func (d *Deps) Login(w http.ResponseWriter, r *http.Request) {
+	var req loginReq
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeErr(w, http.StatusBadRequest, "invalid json")
+		return
+	}
+	req.Username = strings.TrimSpace(req.Username)
+	if req.Username == "" || req.Password == "" {
+		writeErr(w, http.StatusBadRequest, "用户名和密码不能为空")
+		return
+	}
+	u, err := d.Auth.GetByUsername(req.Username)
+	if err != nil || u.Disabled {
+		// 禁用账户与不存在账户返回同样的错误,避免账户枚举
+		writeErr(w, http.StatusUnauthorized, "用户名或密码错误")
+		return
+	}
+	if !auth.CheckPassword(u.PasswordHash, req.Password) {
+		writeErr(w, http.StatusUnauthorized, "用户名或密码错误")
+		return
+	}
+	token, _, err := d.JWT.Issue(u.ID, u.Username, u.Role)
+	if err != nil {
+		writeErr(w, http.StatusInternalServerError, "issue token failed")
+		return
+	}
+	writeJSON(w, http.StatusOK, loginResp{
+		Token: token,
+		User:  publicUserView{ID: u.ID, Username: u.Username, Role: u.Role},
+	})
+}
+
+func (d *Deps) Logout(w http.ResponseWriter, r *http.Request) {
+	// JWT 是无状态的,服务端 logout 仅形式化;前端丢弃 token 即可。
+	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
+}
+
+func (d *Deps) Me(w http.ResponseWriter, r *http.Request) {
+	u, ok := middleware.FromContext(r.Context())
+	if !ok {
+		writeErr(w, http.StatusUnauthorized, "no user in context")
+		return
+	}
+	full, err := d.Auth.GetByID(u.ID)
+	if err != nil {
+		writeErr(w, http.StatusUnauthorized, "user not found")
+		return
+	}
+	writeJSON(w, http.StatusOK, sanitize(full))
+}
+
+// sanitize 把内部 User 转成对外视图,剥掉 password_hash。
+func sanitize(u *store.User) map[string]any {
+	return map[string]any{
+		"id":         u.ID,
+		"username":   u.Username,
+		"role":       u.Role,
+		"disabled":   u.Disabled,
+		"created_at": u.CreatedAt,
+		"updated_at": u.UpdatedAt,
+	}
+}