goji stream 响应
srteam 顾名思义就是一种流，可以源源不断的推送数据，很适合传输一些大数据，或者服务端和客户端长时间 数据交互，比如客户端可以向服务端订阅一个数据，服务端就可以利用 stream 源源不断地推送数据。
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package main
import (
"encoding/json"
"fmt"
"net/http"
"time"
"goji.io"
"goji.io/pat"
"golang.org/x/net/context"
)
type (
Geolocation struct {
Altitude float64
Latitude float64
Longitude float64
}
)
var (
locations = []Geolocation{
{-97, 37.819929, -122.478255},
{1899, 39.096849, -120.032351},
{2619, 37.865101, -119.538329},
{42, 33.812092, -117.918974},
{15, 37.77493, -122.419416},
}
)
func hello(_ context.Context, w http.ResponseWriter, r *http.Request) {
for _, l := range locations {
json.NewEncoder(w).Encode(l)
if f, ok := w.(http.Flusher); ok {
f.Flush()
} else {
fmt.Println("Damn, no flush")
}
time.Sleep(1 * time.Second)
}
}
func main() {
mux := goji.NewMux()
mux.HandleFuncC(pat.Get("/"), hello)
http.ListenAndServe("localhost:8000", mux)
}
请求 $ curl localhost:8000
结果：
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$ curl localhost:8000
{"Altitude":-97,"Latitude":37.819929,"Longitude":-122.478255}
{"Altitude":1899,"Latitude":39.096849,"Longitude":-120.032351}
{"Altitude":2619,"Latitude":37.865101,"Longitude":-119.538329}
{"Altitude":42,"Latitude":33.812092,"Longitude":-117.918974}
{"Altitude":15,"Latitude":37.77493,"Longitude":-122.419416}