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dataWriter.go
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/
dataWriter.go
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package viot
import(
"time"
"encoding/json"
)
type dataWriter struct {
res *responseWrite // 上级
data *ResponseConfig // 数据结构
body interface{} // body 数据
fulfil bool // 判断是否调用了.done(), 避免重复调用
}
//生成响应
func (T *dataWriter) generateResponse() {
if T.data != nil {
return
}
//写入标头
T.res.default200Status()
T.data = &ResponseConfig{
Nonce: T.res.req.nonce,
Status: T.res.status,
Header: T.res.Header(),
Body: T.body,
}
keepAlivesEnabled := T.res.conn.server.doKeepAlives() //服务支持长连接
if !T.res.req.ProtoAtLeast(1, 1) || T.res.req.wantsClose() || !keepAlivesEnabled {
//客户端协议1.0 或 设置了Connection : close。则设置关闭
T.data.Header.Set("Connection","close")
}else if keepAlivesEnabled && (T.res.req.Method == "HEAD" || T.res.bodyAllowed()) {
//客户端支持长连接,要求是长连接并状态码正确
//如果没有设置Connection,则设置为keep-alive
if _, ok := T.data.Header["Connection"]; !ok {
T.data.Header.Set("Connection","keep-alive")
}
}
//关闭连接
T.res.closeAfterReply = (T.data.Header.Get("Connection") != "keep-alive")
if _, ok := T.data.Header["Date"]; !ok {
T.data.Header.Set("Date", time.Now().UTC().Format("2006-01-02 15:04:05"))
}
}
//body内容写入
func (T *dataWriter) SetBody(data interface{}) error {
T.body = data
return nil
}
//无body内容写入
func (T *dataWriter) done() error {
if T.fulfil {
return ErrDoned
}
T.fulfil = true
T.generateResponse()//写入
lineBytes, err := json.Marshal(T.data)
if err != nil {
return err
}
lineBytes = append(lineBytes, '\n')
return T.res.conn.writeLineByte(lineBytes)
}