add html/tmpl for status err page

proxy/error.go

@@ -21,3 +21,75 @@ func HandleError(c *app.RequestContext, message string) {
 	c.JSON(http.StatusInternalServerError, map[string]string{"error": message})
 	logError(message)
 }
+
+type GHProxyErrors struct {
+	StatusCode   int
+	StatusDesc   string
+	StatusText   string
+	HelpInfo     string
+	ErrorMessage string
+}
+
+var (
+	ErrInvalidURL = &GHProxyErrors{
+		StatusCode: 400,
+		StatusDesc: "Bad Request",
+		StatusText: "无效请求",
+		HelpInfo:   "请求的URL格式不正确，请检查后重试。",
+	}
+	ErrAuthHeaderUnavailable = &GHProxyErrors{
+		StatusCode: 401,
+		StatusDesc: "Unauthorized",
+		StatusText: "认证失败",
+		HelpInfo:   "缺少或无效的鉴权信息。",
+	}
+	ErrForbidden = &GHProxyErrors{
+		StatusCode: 403,
+		StatusDesc: "Forbidden",
+		StatusText: "权限不足",
+		HelpInfo:   "您没有权限访问此资源。",
+	}
+	ErrNotFound = &GHProxyErrors{
+		StatusCode: 404,
+		StatusDesc: "Not Found",
+		StatusText: "页面未找到",
+		HelpInfo:   "抱歉，您访问的页面不存在。",
+	}
+	ErrInternalServerError = &GHProxyErrors{
+		StatusCode: 500,
+		StatusDesc: "Internal Server Error",
+		StatusText: "服务器内部错误",
+		HelpInfo:   "服务器处理您的请求时发生错误，请稍后重试或联系管理员。",
+	}
+)
+
+var statusErrorMap map[int]*GHProxyErrors
+
+func init() {
+	statusErrorMap = map[int]*GHProxyErrors{
+		ErrInvalidURL.StatusCode:            ErrInvalidURL,
+		ErrAuthHeaderUnavailable.StatusCode: ErrAuthHeaderUnavailable,
+		ErrForbidden.StatusCode:             ErrForbidden,
+		ErrNotFound.StatusCode:              ErrNotFound,
+		ErrInternalServerError.StatusCode:   ErrInternalServerError,
+	}
+}
+
+func NewErrorWithStatusLookup(statusCode int, errMsg string) *GHProxyErrors {
+	baseErr, found := statusErrorMap[statusCode]
+
+	if found {
+		return &GHProxyErrors{
+			StatusCode:   baseErr.StatusCode,
+			StatusDesc:   baseErr.StatusDesc,
+			StatusText:   baseErr.StatusText,
+			HelpInfo:     baseErr.HelpInfo,
+			ErrorMessage: errMsg,
+		}
+	} else {
+		return &GHProxyErrors{
+			StatusCode:   statusCode,
+			ErrorMessage: errMsg,
+		}
+	}
+}