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163 lines
3.2 KiB
163 lines
3.2 KiB
// SIP URI Library
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//
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// We can't use net.URL because it doesn't support SIP URIs. This is because:
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// a) it doesn't support semicolon parameters; b) it doesn't extract the user
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// and host information when the "//" isn't present.
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//
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// For example:
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//
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// jtunney@bsdtelecom.net;isup-oli=29
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//
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// Roughly equates to:
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//
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// {Scheme: "sip",
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// User: "jtunney",
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// Pass: "",
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// Host: "bsdtelecom.net",
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// Port: "",
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// Params: {"isup-oli": "29"}}
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//
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package sip
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import (
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"bytes"
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"errors"
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"github.com/jart/gosip/util"
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"sort"
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)
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const (
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delims = ":/@;?#<>"
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)
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var (
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URISchemeNotFound = errors.New("scheme not found")
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URIMissingHost = errors.New("host missing")
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URIBadPort = errors.New("invalid port number")
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)
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type URIHeaders map[string]string
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type URI struct {
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Scheme string // e.g. sip, sips, tel, etc.
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User string // e.g. sip:USER@host
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Pass string // e.g. sip:user:PASS@host
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Host string // e.g. example.com, 1.2.3.4, etc.
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Port uint16 // e.g. 5060, 80, etc.
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Params Params // e.g. ;isup-oli=00;day=tuesday
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Headers URIHeaders // e.g. ?subject=project%20x&lol=cat
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}
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//go:generate ragel -Z -G2 -o uri_parse.go uri_parse.rl
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// Deep copies a URI object.
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func (uri *URI) Copy() *URI {
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if uri == nil {
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return nil
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}
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res := new(URI)
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*res = *uri
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res.Params = uri.Params.Copy()
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res.Headers = uri.Headers.Copy()
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return res
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}
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// TODO(jart): URI Comparison https://tools.ietf.org/html/rfc3261#section-19.1.4
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func (uri *URI) String() string {
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if uri == nil {
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return "<nil>"
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}
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var b bytes.Buffer
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uri.Append(&b)
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return b.String()
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}
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func (uri *URI) Append(b *bytes.Buffer) {
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if uri.Scheme == "" {
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b.WriteString("sip:")
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} else {
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b.WriteString(uri.Scheme)
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b.WriteByte(':')
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}
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if uri.User != "" {
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if uri.Pass != "" {
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appendEscaped(b, []byte(uri.User), userc)
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b.WriteByte(':')
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appendEscaped(b, []byte(uri.Pass), passc)
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} else {
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appendEscaped(b, []byte(uri.User), userc)
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}
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b.WriteByte('@')
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}
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if util.IsIPv6(uri.Host) {
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b.WriteByte('[')
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b.WriteString(uri.Host)
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b.WriteByte(']')
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} else {
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b.WriteString(uri.Host)
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}
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if uri.Port > 0 {
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b.WriteByte(':')
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b.WriteString(portstr(uri.Port))
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}
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uri.Params.Append(b)
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uri.Headers.Append(b)
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}
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func (uri *URI) CompareHostPort(other *URI) bool {
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if uri != nil && other != nil {
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if uri.Host == other.Host && uri.GetPort() == other.GetPort() {
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return true
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}
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}
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return false
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}
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func (uri *URI) GetPort() uint16 {
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if uri.Port == 0 {
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if uri.Scheme == "sips" {
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return 5061
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} else {
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return 5060
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}
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} else {
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return uri.Port
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}
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}
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func (headers URIHeaders) Copy() URIHeaders {
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res := make(URIHeaders, len(headers))
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for k, v := range headers {
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res[k] = v
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}
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return res
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}
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func (headers URIHeaders) Append(b *bytes.Buffer) {
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if headers != nil && len(headers) > 0 {
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keys := make([]string, len(headers))
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i := 0
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for k, _ := range headers {
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keys[i] = k
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i++
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}
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sort.Strings(keys)
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first := true
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for _, k := range keys {
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if first {
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b.WriteByte('?')
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first = false
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} else {
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b.WriteByte('&')
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}
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appendEscaped(b, []byte(k), headerc)
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v := headers[k]
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if v != "" {
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b.WriteByte('=')
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appendEscaped(b, []byte(v), headerc)
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}
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}
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}
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}
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