## Recover (恢复) 中间件
Recover 中间件从 panic 链中的任意位置恢复程序, 打印堆栈的错误信息,并将错误集中交给
[HTTPErrorHandler](http://go-echo.org/guide/customization/) 处理。
*用法*
```go
e.Use(middleware.Recover())
```
### 自定义配置
*用法*
```go
e := echo.New()
e.Use(middleware.RecoverWithConfig(middleware.RecoverConfig{
StackSize: 1 << 10, // 1 KB
}))
```
上面的示例使用了 1 kb 的 `StackSize` 和默认值的 `DisableStackAll` 与 `DisablePrintStack` 。
### 配置
```go
RecoverConfig struct {
// Skipper defines a function to skip middleware.
Skipper Skipper
// Size of the stack to be printed.
// Optional. Default value 4KB.
StackSize int `json:"stack_size"`
// DisableStackAll disables formatting stack traces of all other goroutines
// into buffer after the trace for the current goroutine.
// Optional. Default value false.
DisableStackAll bool `json:"disable_stack_all"`
// DisablePrintStack disables printing stack trace.
// Optional. Default value as false.
DisablePrintStack bool `json:"disable_print_stack"`
}
```
*默认配置*
```go
DefaultRecoverConfig = RecoverConfig{
Skipper: defaultSkipper,
StackSize: 4 << 10, // 4 KB
DisableStackAll: false,
DisablePrintStack: false,
}
```