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94 lines
2.5 KiB
Go
94 lines
2.5 KiB
Go
// Copyright 2014 The Mellium Contributors.
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// Use of this source code is governed by the BSD-2-clause
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// license that can be found in the LICENSE-mellium file.
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// Original taken from mellium.im/xmpp/jid (BSD-2-Clause) and adjusted for my needs.
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// Copyright Martin Dosch
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package main
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import (
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"errors"
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"strings"
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"unicode/utf8"
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)
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// MarshalJID checks that JIDs include localpart and serverpart
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// and return it marshaled. Shamelessly stolen from
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// mellium.im/xmpp/jid
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func MarshalJID(input string) (string, error) {
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var (
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err error
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localpart string
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domainpart string
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resourcepart string
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)
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s := input
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// Remove any portion from the first '/' character to the end of the
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// string (if there is a '/' character present).
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sep := strings.Index(s, "/")
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if sep == -1 {
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resourcepart = ""
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} else {
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// If the resource part exists, make sure it isn't empty.
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if sep == len(s)-1 {
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return input, errors.New("Invalid JID" + input + ": The resourcepart must be larger than 0 bytes")
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}
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resourcepart = s[sep+1:]
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s = s[:sep]
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}
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// Remove any portion from the beginning of the string to the first
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// '@' character (if there is an '@' character present).
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sep = strings.Index(s, "@")
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switch {
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case sep == -1:
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// There is no @ sign, and therefore no localpart.
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domainpart = s
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case sep == 0:
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// The JID starts with an @ sign (invalid empty localpart)
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err = errors.New("Invalid JID:" + input)
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return input, err
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default:
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domainpart = s[sep+1:]
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localpart = s[:sep]
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}
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// We'll throw out any trailing dots on domainparts, since they're ignored:
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//
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// If the domainpart includes a final character considered to be a label
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// separator (dot) by [RFC1034], this character MUST be stripped from
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// the domainpart before the JID of which it is a part is used for the
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// purpose of routing an XML stanza, comparing against another JID, or
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// constructing an XMPP URI or IRI [RFC5122]. In particular, such a
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// character MUST be stripped before any other canonicalization steps
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// are taken.
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domainpart = strings.TrimSuffix(domainpart, ".")
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var jid string
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if !utf8.ValidString(localpart) || !utf8.ValidString(domainpart) || !utf8.ValidString(resourcepart) {
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return input, errors.New("Invalid JID: " + input)
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}
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if domainpart == "" {
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return input, errors.New("Invalid JID: " + input)
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}
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if localpart == "" {
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jid = domainpart
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} else {
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jid = localpart + "@" + domainpart
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}
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if resourcepart == "" {
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return jid, err
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}
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return jid + "/" + resourcepart, err
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}
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