error.go源码笔记

package pingo

import (

    "errors"

    "strings"

)

const (

    errorCodeConnFailed = "err-connection-failed"

    errorCodeHttpServe  = "err-http-serve"

)

// Error reported when connection to the external plugin has failed.

type ErrConnectionFailed error

// Error reported when the external plugin cannot start listening for calls.

type ErrHttpServe error

// Error reported when an invalid message is printed by the external plugin.

type ErrInvalidMessage error

// Error reported when the plugin fails to register before the registration

// timeout expires.

type ErrRegistrationTimeout error

func parseError(line string) error {

    parts := strings.SplitN(line, ": ", 2)

    if parts[0] == "" {

        return nil

    }

    err := errors.New(parts[1])

    switch parts[0] {

    case errorCodeConnFailed:

        return ErrConnectionFailed(err)

    case errorCodeHttpServe:

        return ErrHttpServe(err)

    }

    return err

}