如何在2个revese代理链之后强制主机名

Question

Spring Boot应用程序托管在2个反向代理（链接）后面。

反向代理1--

并且主机和转发标头没有正确链接。有没有办法将主机强制为固定值？就像“反向代理1”的主机名一样？

Answer 1

我已通过更改传入请求中的serverName修复了我的问题。

我为tomcat添加了一个阀：

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);
}
}