Scala Play 2.6.7 Akka 中的请求缺少必需的“主机”标头错误答案

【问题标题】：Request is missing required `Host` header error in Scala Play 2.6.7 AkkaScala Play 2.6.7 Akka 中的请求缺少必需的“主机”标头错误
【发布时间】：2017-11-23 02:16:35
【问题描述】：

在生产模式下，服务器启动失败并一直打印以下日志。我无法访问网页。但是代码在开发模式下运行良好。如何解决问题？

2017-11-23T10:04:07+08 [INFO] from play.core.server.AkkaHttpServer [main]
        Listening for HTTP on /0:0:0:0:0:0:0:0:9000
2017-11-23T10:04:08+08 [WARN] from akka.actor.ActorSystemImpl [application-akka.actor.default-dispatcher-4]
        Illegal request, responding with status '400 Bad Request': Request is 
        missing required `Host` header: Cannot establish effective URI of request 
        to `/`, request has a relative URI and is missing a `Host` header;
        consider setting `akka.http.server.default-host-header`

2017-11-23T10:04:08+08 [WARN] from akka.actor.ActorSystemImpl [application-akka.actor.default-dispatcher-3]
        Illegal request, responding with status '400 Bad Request': Request is 
        missing required `Host` header: Cannot establish effective URI of request 
        to `/`, request has a relative URI and is missing a `Host` header;
        consider setting `akka.http.server.default-host-header`

【问题讨论】：

标签： scala playframework akka

【解决方案1】：

haproxy 服务器健康检查未将 Host 标头发送到服务器

haproxy httpchk 应该这样修改

option  httpchk GET / HTTP/1.1\r\nHost:localhost

【讨论】：

【解决方案2】：

根据您的 HAProxy 版本，支持的语法可能会有所不同。这似乎适用于 HAProxy 2.0.x

option httpchk GET /health
http-check send hdr Host localhost

请务必检查 the documentation 的版本。

【讨论】：