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path: root/errors.go
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package acme

import (
	"encoding/json"
	"errors"
	"io/ioutil"
	"net/http"
)

var (
	errBadCSR         = errors.New("The CSR is unacceptable (e.g., due to a short key)")
	errBadNonce       = errors.New("The client sent an unacceptable anti-replay nonce")
	errConnection     = errors.New("The server could not connect to the client for DV")
	errDnssec         = errors.New("The server could not validate a DNSSEC signed domain")
	errMalformed      = errors.New("The request message was malformed")
	errServerInternal = errors.New("The server experienced an internal error")
	errTLS            = errors.New("The server experienced a TLS error during DV")
	errUnauthorized   = errors.New("The client lacks sufficient authorization")
	errUnknownHost    = errors.New("The server could not resolve a domain name")
)

// Errors
var urnErrors = map[string]error{
	"urn:acme:error:badCSR":         errBadCSR,
	"urn:acme:error:badNonce":       errBadNonce,
	"urn:acme:error:connection":     errConnection,
	"urn:acme:error:dnssec":         errDnssec,
	"urn:acme:error:malformed":      errMalformed,
	"urn:acme:error:serverInternal": errServerInternal,
	"urn:acme:error:tls":            errTLS,
	"urn:acme:error:unauthorized":   errUnauthorized,
	"urn:acme:error:unknownHost":    errUnknownHost,
}

func handleError(r *http.Response) error {
	defer r.Body.Close()
	body, err := ioutil.ReadAll(r.Body)
	if err != nil {
		return err
	}
	var p Problem
	err = json.Unmarshal(body, &p)
	if err != nil {
		return err
	}
	return p
}

func (p Problem) Error() string {
	if err, ok := urnErrors[p.Type]; ok {
		return err.Error() + ": " + p.Detail
	}
	return p.Detail
}