82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
package middleware
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import (
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"fmt"
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"runtime"
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"github.com/labstack/echo"
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)
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type (
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// RecoverConfig defines the config for Recover middleware.
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RecoverConfig struct {
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// Skipper defines a function to skip middleware.
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Skipper Skipper
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// Size of the stack to be printed.
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// Optional. Default value 4KB.
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StackSize int `json:"stack_size"`
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// DisableStackAll disables formatting stack traces of all other goroutines
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// into buffer after the trace for the current goroutine.
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// Optional. Default value false.
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DisableStackAll bool `json:"disable_stack_all"`
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// DisablePrintStack disables printing stack trace.
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// Optional. Default value as false.
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DisablePrintStack bool `json:"disable_print_stack"`
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}
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)
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var (
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// DefaultRecoverConfig is the default Recover middleware config.
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DefaultRecoverConfig = RecoverConfig{
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Skipper: DefaultSkipper,
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StackSize: 4 << 10, // 4 KB
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DisableStackAll: false,
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DisablePrintStack: false,
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}
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)
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// Recover returns a middleware which recovers from panics anywhere in the chain
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// and handles the control to the centralized HTTPErrorHandler.
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func Recover() echo.MiddlewareFunc {
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return RecoverWithConfig(DefaultRecoverConfig)
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}
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// RecoverWithConfig returns a Recover middleware with config.
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// See: `Recover()`.
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func RecoverWithConfig(config RecoverConfig) echo.MiddlewareFunc {
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// Defaults
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if config.Skipper == nil {
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config.Skipper = DefaultRecoverConfig.Skipper
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}
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if config.StackSize == 0 {
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config.StackSize = DefaultRecoverConfig.StackSize
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}
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return func(next echo.HandlerFunc) echo.HandlerFunc {
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return func(c echo.Context) error {
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if config.Skipper(c) {
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return next(c)
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}
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defer func() {
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if r := recover(); r != nil {
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err, ok := r.(error)
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if !ok {
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err = fmt.Errorf("%v", r)
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}
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stack := make([]byte, config.StackSize)
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length := runtime.Stack(stack, !config.DisableStackAll)
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if !config.DisablePrintStack {
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c.Logger().Printf("[PANIC RECOVER] %v %s\n", err, stack[:length])
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}
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c.Error(err)
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}
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}()
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return next(c)
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}
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}
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}
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