英文:
How to make a long connection with http.Client?
问题
我试图建立一个长连接的http服务器，像下面这样：
func main() {
request, err := http.NewRequest("GET", "http://long.connection.org:8080/", nil)
request.SetBasicAuth("xxx", "oooo")
http_client := &http.Client{}
response, _ := http_client.Do(request)
var buf []byte
for {
_, err := response.Body.Read(buf)
if err == io.EOF { break }
fmt.Printf("%s", string(buf))
}
}
但是从response.Body读取的内容总是为空。而且似乎我不能使用response.Body将数据发送到服务器。
有人可以帮忙吗？
英文:
I try to connect a http server as long connection, like below:
func main() {
request, err := http.NewRequest("GET", "http://long.connection.org:8080/", nil)
request.SetBasicAuth("xxx", "oooo")
http_client := &http.Client{}
response, _ := http_client.Do(request)
var buf []byte
for {
_, err := response.Body.Read(buf)
if err == io.EOF { break }
fmt.Printf("%s", string(buf))
}
}
But read from response.Body always empty. And seems I can't use response.Body to send data to server.
Any one can help?
答案1
得分: 2
这似乎是有效的：
package main
import (
"fmt"
"io"
"log"
"net/http"
)
func main() {
request, err := http.NewRequest("GET", "http://www.example.com/", nil)
if err != nil {
log.Fatal(err)
}
http_client := &http.Client{}
response, err := http_client.Do(request)
if err != nil {
log.Fatal(err)
}
buf := make([]byte, 4096) // 任何非零值都可以，尝试'1'。
for {
n, err := response.Body.Read(buf)
if n == 0 && err != nil { // 简化
break
}
fmt.Printf("%s", buf[:n]) // 这里不需要转换为字符串
}
fmt.Println()
}
编辑：添加了忘记的NewRequest的错误处理。
英文:
This seems to work:
package main
import (
"fmt"
"io"
"log"
"net/http"
)
func main() {
request, err := http.NewRequest("GET", "http://www.example.com/", nil)
if err != nil {
log.Fatal(err)
}
http_client := &http.Client{}
response, err := http_client.Do(request)
if err != nil {
log.Fatal(err)
}
buf := make([]byte, 4096) // any non zero value will do, try '1'.
for {
n, err := response.Body.Read(buf)
if n == 0 && err != nil { // simplified
break
}
fmt.Printf("%s", buf[:n]) // no need to convert to string here
}
fmt.Println()
}
Edit: Added forgotten error handling of NewRequest.
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