Initial commit (code only without large binaries)

EdgeNode/internal/caches/errors.go

@@ -0,0 +1,61 @@
+// Copyright 2021 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package caches
+
+import "errors"
+
+// 常用的几个错误
+var (
+	ErrNotFound                = errors.New("cache not found")
+	ErrFileIsWriting           = errors.New("the cache file is updating")
+	ErrInvalidRange            = errors.New("invalid range")
+	ErrEntityTooLarge          = errors.New("entity too large")
+	ErrWritingUnavailable      = errors.New("writing unavailable")
+	ErrWritingQueueFull        = errors.New("writing queue full")
+	ErrServerIsBusy            = errors.New("server is busy")
+	ErrUnexpectedContentLength = errors.New("unexpected content length")
+)
+
+// CapacityError 容量错误
+// 独立出来是为了可以在有些场合下可以忽略，防止产生没必要的错误提示数量太多
+type CapacityError struct {
+	err string
+}
+
+func NewCapacityError(err string) error {
+	return &CapacityError{err: err}
+}
+
+func (this *CapacityError) Error() string {
+	return this.err
+}
+
+// CanIgnoreErr 检查错误是否可以忽略
+func CanIgnoreErr(err error) bool {
+	if err == nil {
+		return true
+	}
+	if errors.Is(err, ErrFileIsWriting) ||
+		errors.Is(err, ErrEntityTooLarge) ||
+		errors.Is(err, ErrWritingUnavailable) ||
+		errors.Is(err, ErrWritingQueueFull) ||
+		errors.Is(err, ErrServerIsBusy) {
+		return true
+	}
+
+	var capacityErr *CapacityError
+	return errors.As(err, &capacityErr)
+}
+
+func IsCapacityError(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	var capacityErr *CapacityError
+	return errors.As(err, &capacityErr)
+}
+
+func IsBusyError(err error) bool {
+	return err != nil && errors.Is(err, ErrServerIsBusy)
+}