I am interested in the action of web server to http keep-alive header. So I built a simple http server based on http server. The server does nothing but response to the client with a simple html http body.
The code of server is here:
package main
import (
"fmt"
"net"
"os"
)
func main() {
l, err := net.Listen("tcp", "localhost:9765")
if err != nil {
fmt.Println("Error listening:", err.Error())
os.Exit(1)
}
defer l.Close()
for {
conn, err := l.Accept()
fmt.Println("New connection...")
if err != nil {
fmt.Println("Error accepting: ", err.Error())
os.Exit(1)
}
go handleRequest(conn)
}
}
// handler
func handleRequest(conn net.Conn) {
for {
buf := make([]byte, 512)
_, err := conn.Read(buf)
if err != nil {
fmt.Println("Error reading:", err.Error())
conn.Close()
break
}
fmt.Printf("%s", buf)
str := `HTTP/1.1 200 OK
Connection: keep-alive
Content-Length: 8
Content-Type: application/javascript
alert(1)
`
conn.Write([]byte(str))
}
}
I added a demo html to local nginx static server:
<head>
<meta charset="UTF-8">
<script type=text/javascript src="test.js"></script>
<script type=text/javascript src="http://localhost:9765/3"></script>
<script type=text/javascript src="http://localhost:9765/2"></script>
<script type=text/javascript src="http://localhost:9765/1"></script>
<script type=text/javascript src="http://localhost:9765/17"></script>
<script type=text/javascript src="http://localhost:9765/16"></script>
<script type=text/javascript src="http://localhost:9765/15"></script>
<script type=text/javascript src="http://localhost:9765/14"></script>
<script type=text/javascript src="http://localhost:9765/13"></script>
<script type=text/javascript src="http://localhost:9765/12"></script>
<script type=text/javascript src="http://localhost:9765/30"></script>
<script type=text/javascript src="http://localhost:9765/29"></script>
<script type=text/javascript src="http://localhost:9765/28"></script>
<script type=text/javascript src="http://localhost:9765/27"></script>
<script type=text/javascript src="http://localhost:9765/26"></script>
<script type=text/javascript src="http://localhost:9765/25"></script>
<script type=text/javascript src="http://localhost:9765/24"></script>
<script type=text/javascript src="http://localhost:9765/23"></script>
<script type=text/javascript src="http://localhost:9765/22></script>
<script type=text/javascript src="http://localhost:9765/21"></script>
</head>
<body>
<h1>loader测试页面</h1>
<span>hello world</span>
</body>
</html>
When visit the file with chrome, I found all response is normal, but tcp connection was closed after every single http request. The TCP got EOF error after sending http response.
