/
ftmessage.go
79 lines (67 loc) · 1.69 KB
/
ftmessage.go
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package kafka
import (
"bytes"
"regexp"
"strings"
)
type FTMessage struct {
Headers map[string]string
Body string
}
func NewFTMessage(headers map[string]string, body string) FTMessage {
return FTMessage{
Headers: headers,
Body: body,
}
}
func (m *FTMessage) Build() string {
var buffer bytes.Buffer
buffer.WriteString("FTMSG/1.0\r\n")
for k, v := range m.Headers {
buffer.WriteString(k)
buffer.WriteString(": ")
buffer.WriteString(v)
buffer.WriteString("\r\n")
}
buffer.WriteString("\r\n")
buffer.WriteString(m.Body)
return buffer.String()
}
func rawToFTMessage(msg []byte) FTMessage {
ftMsg := FTMessage{}
raw := string(msg)
doubleNewLineStartIndex := getHeaderSectionEndingIndex(string(raw[:]))
ftMsg.Headers = parseHeaders(string(raw[:doubleNewLineStartIndex]))
ftMsg.Body = strings.TrimSpace(string(raw[doubleNewLineStartIndex:]))
return ftMsg
}
var re = regexp.MustCompile("[\\w-]*:[\\w\\-:/.+;= ]*")
var kre = regexp.MustCompile("[\\w-]*:")
var vre = regexp.MustCompile(":[\\w-:/.+;= ]*")
func getHeaderSectionEndingIndex(msg string) int {
//FT msg format uses CRLF for line endings
i := strings.Index(msg, "\r\n\r\n")
if i != -1 {
return i
}
//fallback to UNIX line endings
i = strings.Index(msg, "\n\n")
if i != -1 {
return i
}
return len(msg)
}
func parseHeaders(msg string) map[string]string {
headerLines := re.FindAllString(msg, -1)
headers := make(map[string]string)
for _, line := range headerLines {
key, value := parseHeader(line)
headers[key] = value
}
return headers
}
func parseHeader(header string) (string, string) {
key := kre.FindString(header)
value := vre.FindString(header)
return key[:len(key)-1], strings.TrimSpace(value[1:])
}