如何在 2 个反向代理链后面强制主机名

Question

一个 spring boot 应用程序托管在 2 个反向代理（链接）后面。反向代理 1 --> 反向代理 2 --> spring boot 应用程序并且主机和转发标头未正确链接。有没有办法强制主机为固定值？像“反向代理 1”的主机名？

Answer 1

我已通过更改传入请求中的服务器名称解决了我的问题。

我已经为 tomcat 添加了一个阀门：

public class HostForceValve extends ValveBase {

private final String proxyName;

public HostForceValve(String proxyName) {

    this.proxyName = proxyName;

}

@Override public void invoke(Request request, Response response) throws IOException, ServletException {

    org.apache.coyote.Request coyoteRequest = request.getCoyoteRequest();

    MimeHeaders mimeHeaders = coyoteRequest.getMimeHeaders();

    mimeHeaders.removeHeader("host");

    final MessageBytes host = mimeHeaders.addValue("host");

    host.setString(proxyName);

    request.setRemoteHost(proxyName);

    request.getCoyoteRequest().serverName().setString(proxyName);

    try {

        Valve next = getNext();

        if (null == next) {

            return;

        }

        next.invoke(request, response);

    } finally {

        request.setRemoteHost(proxyName);

    }

}

}

并将此值添加到 tomcat 嵌入式服务器：

@Component

public class MyTomcatCustomizer implements WebServerFactoryCustomizer<TomcatServletWebServerFactory> {

@Value("${proxyName:}")

private String proxyName;

@Override

public void customize(TomcatServletWebServerFactory factory) {

    final Collection<Valve> currents = factory.getEngineValves();

    final ArrayList<Valve> addValves = new ArrayList<>(currents);

    if (StringUtils.hasLength(proxyName)) {

        addValves.add(0, new HostForceValve(proxyName));

    }

    factory.setEngineValves(addValves);

}

}