67 lines
1.7 KiB
Go
67 lines
1.7 KiB
Go
package smtp
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import (
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"fmt"
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"regexp"
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"strings"
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)
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func parseCmd(line string) (cmd string, arg string, err error) {
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line = strings.TrimRight(line, "\r\n")
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l := len(line)
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switch {
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case strings.HasPrefix(line, "STARTTLS"):
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return "STARTTLS", "", nil
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case l == 0:
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return "", "", nil
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case l < 4:
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return "", "", fmt.Errorf("Command too short: %q", line)
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case l == 4:
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return strings.ToUpper(line), "", nil
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case l == 5:
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// Too long to be only command, too short to have args
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return "", "", fmt.Errorf("Mangled command: %q", line)
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}
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// If we made it here, command is long enough to have args
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if line[4] != ' ' {
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// There wasn't a space after the command?
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return "", "", fmt.Errorf("Mangled command: %q", line)
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}
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// I'm not sure if we should trim the args or not, but we will for now
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//return strings.ToUpper(line[0:4]), strings.Trim(line[5:], " "), nil
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return strings.ToUpper(line[0:4]), strings.Trim(line[5:], " \n\r"), nil
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}
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// Takes the arguments proceeding a command and files them
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// into a map[string]string after uppercasing each key. Sample arg
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// string:
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// " BODY=8BITMIME SIZE=1024"
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// The leading space is mandatory.
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func parseArgs(arg string) (args map[string]string, err error) {
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args = map[string]string{}
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re := regexp.MustCompile(" (\\w+)=(\\w+)")
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pm := re.FindAllStringSubmatch(arg, -1)
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if pm == nil {
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return nil, fmt.Errorf("Failed to parse arg string: %q", arg)
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}
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for _, m := range pm {
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args[strings.ToUpper(m[1])] = m[2]
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}
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return args, nil
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}
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func parseHelloArgument(arg string) (string, error) {
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domain := arg
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if idx := strings.IndexRune(arg, ' '); idx >= 0 {
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domain = arg[:idx]
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}
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if domain == "" {
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return "", fmt.Errorf("Invalid domain")
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}
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return domain, nil
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}
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