forked from hprose/hprose-golang
/
socket_common.go
168 lines (158 loc) · 3.89 KB
/
socket_common.go
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/**********************************************************\
| |
| hprose |
| |
| Official WebSite: http://www.hprose.com/ |
| http://www.hprose.org/ |
| |
\**********************************************************/
/**********************************************************\
* *
* rpc/socket_common.go *
* *
* hprose socket common for Go. *
* *
* LastModified: Jan 7, 2017 *
* Author: Ma Bingyao <andot@hprose.com> *
* *
\**********************************************************/
package rpc
import (
"io"
"net"
"time"
hio "github.com/hprose/hprose-golang/io"
"github.com/hprose/hprose-golang/util"
)
type packet struct {
fullDuplex bool
id [4]byte
body []byte
}
type socketResponse struct {
data []byte
err error
}
func sendData(writer io.Writer, data packet) (err error) {
n := len(data.body)
i := 4
var len int
switch {
case n > 1016 && n <= 1400:
len = 2048
case n > 504:
len = 1024
default:
len = 512
}
buf := hio.AcquireBytes(len)
if data.fullDuplex {
util.FromUint32(buf, uint32(n)|0x80000000)
buf[4] = data.id[0]
buf[5] = data.id[1]
buf[6] = data.id[2]
buf[7] = data.id[3]
i = 8
} else {
util.FromUint32(buf, uint32(n))
}
p := len - i
if n <= p {
copy(buf[i:], data.body)
_, err = writer.Write(buf[:n+i])
hio.ReleaseBytes(buf)
} else {
copy(buf[i:], data.body[:p])
_, err = writer.Write(buf)
hio.ReleaseBytes(buf)
if err != nil {
return err
}
_, err = writer.Write(data.body[p:])
}
return err
}
func recvData(reader io.Reader, data *packet) (err error) {
header := data.id[:]
if _, err = io.ReadAtLeast(reader, header, 4); err != nil {
return
}
size := util.ToUint32(header)
data.fullDuplex = (size&0x80000000 != 0)
if data.fullDuplex {
size &= 0x7FFFFFFF
data.fullDuplex = true
data.body = nil
if _, err = io.ReadAtLeast(reader, data.id[:], 4); err != nil {
return
}
}
if cap(data.body) >= int(size) {
data.body = data.body[:size]
} else {
data.body = make([]byte, size)
}
_, err = io.ReadAtLeast(reader, data.body, int(size))
return
}
func hdSendData(writer io.Writer, data []byte) (err error) {
n := len(data)
const i = 4
var len int
switch {
case n > 1020 && n <= 1400:
len = 2048
case n > 508:
len = 1024
default:
len = 512
}
buf := hio.AcquireBytes(len)
util.FromUint32(buf, uint32(n))
p := len - i
if n <= p {
copy(buf[i:], data)
_, err = writer.Write(buf[:n+i])
hio.ReleaseBytes(buf)
} else {
copy(buf[i:], data[:p])
_, err = writer.Write(buf)
hio.ReleaseBytes(buf)
if err != nil {
return err
}
_, err = writer.Write(data[p:])
}
return err
}
func hdRecvData(reader io.Reader, buf []byte) (data []byte, err error) {
var header [4]byte
if _, err = io.ReadAtLeast(reader, header[:], 4); err != nil {
return
}
size := util.ToUint32(header[:])
if cap(buf) >= int(size) {
data = buf[:size]
} else {
data = make([]byte, size)
}
_, err = io.ReadAtLeast(reader, data, int(size))
return
}
func nextTempDelay(
err error, event ServiceEvent, tempDelay time.Duration) time.Duration {
if ne, ok := err.(net.Error); ok && ne.Temporary() {
if tempDelay == 0 {
tempDelay = 5 * time.Millisecond
} else {
tempDelay *= 2
}
if max := 1 * time.Second; tempDelay > max {
tempDelay = max
}
FireErrorEvent(event, err, nil)
time.Sleep(tempDelay)
return tempDelay
}
return 0
}