telegraf/plugins/inputs/phpfpm/fcgi_client.go

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package phpfpm
import (
"errors"
"io"
"net"
"strconv"
"strings"
)
// Create an fcgi client
func newFcgiClient(h string, args ...interface{}) (*conn, error) {
var con net.Conn
if len(args) != 1 {
return nil, errors.New("fcgi: not enough params")
}
var err error
switch args[0].(type) {
case int:
addr := h + ":" + strconv.FormatInt(int64(args[0].(int)), 10)
con, err = net.Dial("tcp", addr)
case string:
laddr := net.UnixAddr{Name: args[0].(string), Net: h}
con, err = net.DialUnix(h, nil, &laddr)
default:
err = errors.New("fcgi: we only accept int (port) or string (socket) params.")
}
fcgi := &conn{
rwc: con,
}
return fcgi, err
}
func (client *conn) Request(
env map[string]string,
requestData string,
) (retout []byte, reterr []byte, err error) {
defer client.rwc.Close()
var reqId uint16 = 1
err = client.writeBeginRequest(reqId, uint16(roleResponder), 0)
if err != nil {
return
}
err = client.writePairs(typeParams, reqId, env)
if err != nil {
return
}
if len(requestData) > 0 {
if err = client.writeRecord(typeStdin, reqId, []byte(requestData)); err != nil {
return
}
}
rec := &record{}
var err1 error
2017-11-01 00:00:06 +00:00
// recive until EOF or FCGI_END_REQUEST
READ_LOOP:
for {
err1 = rec.read(client.rwc)
if err1 != nil && strings.Contains(err1.Error(), "use of closed network connection") {
if err1 != io.EOF {
err = err1
}
break
}
switch {
case rec.h.Type == typeStdout:
retout = append(retout, rec.content()...)
case rec.h.Type == typeStderr:
reterr = append(reterr, rec.content()...)
case rec.h.Type == typeEndRequest:
fallthrough
default:
break READ_LOOP
}
}
return
}