Spring boot Keep-Alive apache基准测试

Question

我正在尝试通过Spring Boot使用Keep-Alive，使用的配置来自：https://stackoverflow.com/a/31461882/5585182

# application.properties
server.connection-timeout=60000

当我想要验证Apache基准测试连接是否处于活动状态时。

ab -v 2 -k -c 1 -n 10 http://localhost:8080/api/test

我得到以下输出：

---
GET /api/test HTTP/1.0
Connection: Keep-Alive
Host: localhost:8080
User-Agent: ApacheBench/2.3
Accept: */*


---
LOG: header received:
HTTP/1.1 200
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: 0
X-Frame-Options: DENY
Content-Type: application/json;charset=UTF-8
Date: Wed, 27 Dec 2017 15:17:54 GMT
Connection: close

正如你所看到的，它响应了Connection: close，有人知道为什么它不工作了吗？

Answer 1

ab正在使用HTTP/1.0而不是HTTP/1.1。它发送了一个keep-alive报头，所以它应该仍然可以工作，因为Tomcat使用HTTP/1.0支持keep-alive：

https://tomcat.apache.org/tomcat-9.0-doc/config/http.html#HTTP/1.1_and_HTTP/1.0_Support

但我也在这里测试过了。ab没有keep-alive，但当使用telnet测试时，它可以与SpringBoot/tomcat一起工作：

$ telnet 127.0.0.1 80
Trying 127.0.0.1...
Connected to 127.0.0.1
Escape character is '^]'.
GET / HTTP/1.1
Host: www.myhost.de

HTTP/1.1 200 
Cache-Control: no
...
Connection still open