/
response.go
80 lines (68 loc) · 1.65 KB
/
response.go
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package http
import (
"bytes"
"reflect"
"strconv"
"github.com/Lqlsoftware/gopcap/stream"
)
// "/r/n"
var CRLF = []byte{13,10}
// ": "
var SEP = []byte{58,32}
// HTTP返回
type HttpResponse struct {
// HTTP-Header
header *map[string]string
// HTTP-Version
version *string
// HTTP-State
stateCode HttpStateCode
// HTTP-Content
contents *stream.HttpStream
}
// Response Content 写入接口
func (rep *HttpResponse)Write(Data ...interface{}) {
for argNum, arg := range Data {
if argNum > 0 {
rep.contents.WriteString(" ")
}
if arg != nil {
rep.contents.WriteString(reflect.ValueOf(arg).String())
} else {
rep.contents.WriteString("nil")
}
}
}
// 设置response的首部
func (rep *HttpResponse)SetHeader(key string, value string) {
(*rep.header)[key] = value
}
// response变成HttpStream
func (rep *HttpResponse)getStream() *stream.HttpStream {
// 设置默认头部
(*rep.header)["Content-Length"] = strconv.FormatInt(rep.contents.GetContentLen(),10)
// 计算byte总共长度 防止append申请内存拷贝
length := 38
for key,value := range *rep.header {
length += len(key) + len(value)
}
// 申请固定capacity的内存
buffer := bytes.NewBuffer(make([]byte, 0, length))
buffer.WriteString(*rep.version)
buffer.WriteByte(32)
buffer.WriteString(strconv.Itoa(int(rep.stateCode)))
buffer.WriteByte(32)
buffer.WriteString(getStateName(rep.stateCode))
buffer.Write(CRLF)
// header
for key,value := range *rep.header {
buffer.WriteString(key)
buffer.Write(SEP)
buffer.WriteString(value)
buffer.Write(CRLF)
}
buffer.Write(CRLF)
rep.contents.SetRawHeader(buffer.Bytes())
rep.contents.UpdateLen()
return rep.contents
}