82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
package rfc1288
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import(
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"errors"
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"strings"
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"bytes"
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)
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func is_unix_conventional(c byte) bool {
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return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')
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}
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type Rfc1288RequestType int
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const (
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UserList Rfc1288RequestType = 0
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User Rfc1288RequestType = 1
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Remote Rfc1288RequestType = 2
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)
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type Rfc1288Request struct {
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Type Rfc1288RequestType
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User* string
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Host* string
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}
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func ParseRfc1288Request(Buffer string) (error, *Rfc1288Request) {
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if pos := strings.IndexAny(Buffer, "\r\n"); pos > 0 {
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Buffer = Buffer[:pos]
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}
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Buflen := len(Buffer)
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if Buflen < 2 {
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return errors.New("Protocol not recognized"), nil
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}
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if Buffer[0] != '/' || (Buffer[1] != 'W' && Buffer[1] != 'w') {
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return errors.New("Protocol not recognized"), nil
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}
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if len(Buffer) == 2 {
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return nil, &Rfc1288Request{UserList, nil, nil}
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}
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index := 2
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for index < Buflen && Buffer[index] == ' ' {
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index += 1
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}
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if Buflen == index {
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return nil, &Rfc1288Request{Type: UserList, User: nil, Host: nil}
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}
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user := bytes.NewBufferString("")
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host := bytes.NewBufferString("")
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for index < Buflen && is_unix_conventional(Buffer[index]) {
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user.WriteByte(Buffer[index])
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index += 1
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}
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if index == Buflen || (index < Buflen && Buffer[index] == ' ') {
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ruser := user.String()
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return nil, &Rfc1288Request{Type: User, User: &ruser, Host: nil}
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}
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if Buffer[index] != '@' {
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return errors.New("Protocol does not meet specification"), nil
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}
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index += 1
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for index < Buflen && Buffer[index] != ' ' {
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host.WriteByte(Buffer[index])
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index += 1
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}
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ruser := user.String()
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rhost := host.String()
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return nil, &Rfc1288Request{Type: Remote, User: &ruser, Host: &rhost}
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}
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