How to solve the problem of RpcContext.getContext().getRemoteAddress() returning empty in HSF framework?

Effective method to obtain the caller's IP address under the HSF framework

When using the HSF framework to provide services, use RpcContext.getContext().getRemoteAddress() directly to get the caller's IP address often returns empty values. This is because the HSF framework does not record the caller IP by default in the service provider. This article will provide effective solutions to this problem.

Problem analysis:

The provided code snippet shows that the service provider attempts to get the IP using RpcContext.getContext().getRemoteAddress() , but the result is empty. RpcContext class comes from edas-sdk-1.8.3.jar , and its getRemoteAddress() method returns an InetSocketAddress object, which is not usually automatically populated on the service provider.

Solution: Pass IP address through custom Attachment

The most reliable solution is to set the IP address on the caller through Attachment mechanism of the HSF framework and then obtain it on the service provider.

Service provider code (YwcxServiceImpl):

 @Slf4j
@HsfProvider(serviceInterface = YwcxService.class, serviceVersion = "1.0.0")
public class YwcxServiceImpl implements YwcxService {
    @Override
    public String insert(List<ywcxquery> ywcxquerylist) {
        String remoteIp = RpcContext.getContext().getAttachment("remoteIp");
        log.info("Remote IP: {}", remoteIp);
        // Business logic...
        return "success"; // or other return value
    }
}</ywcxquery>

Service caller code (Service B):

 @Scheduled(cron = "${task.cron.runTaskHuayu}")
public String dsrw() {
    // Get the caller's IP address (you need to replace the method of obtaining the IP according to the actual situation)
    String callerIp = getCallerIpAddress(); 

    RpcContext.getContext().setAttachment("remoteIp", callerIp);
    return ywcxService.inster(fqxcsqquerylist);
}

// The method to get the caller's IP address needs to implement private String getCallerIpAddress() {
    // For example, use HttpServletRequest to get the IP
    // Or use other methods to obtain the local IP
    // Here you need to implement return "127.0.0.1" according to your specific application scenario; // Replace with the code that actually obtains the IP address}

Key Improvements:

• Use Attachment explicitly: the service caller uses RpcContext.getContext().setAttachment("remoteIp", callerIp); adds the caller IP address to the context as an Attachment.
• Get Attachment: The service provider uses RpcContext.getContext().getAttachment("remoteIp"); to get the attached IP address from the context.
• Implementation of getting the caller's IP address: getCallerIpAddress() method needs to be implemented according to actual application scenarios. For example, in a web application, you can use the HttpServletRequest object to obtain the client IP address; in other environments, you may need to use different methods to obtain the native IP address.

With this method, even if RpcContext.getContext().getRemoteAddress() returns empty, it can reliably obtain the caller's IP address. Remember to replace the placeholder code in getCallerIpAddress() method to the logic that actually gets the IP.

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