如何在Spring MVC控制器get call中提取IP地址？

Question

我正在从事Spring MVC控制器项目，在该项目中，我正在从浏览器中进行GET URL调用-

下面是我在浏览器中进行GET调用的url-

http://127.0.0.1:8080/testweb/processing?workflow=test&conf=20140324&dc=all

下面是点击浏览器后调用的代码-

@RequestMapping(value = "processing", method = RequestMethod.GET)
public @ResponseBody ProcessResponse processData(@RequestParam("workflow") final String workflow,
    @RequestParam("conf") final String value, @RequestParam("dc") final String dc) {

        System.out.println(workflow);
        System.out.println(value);
        System.out.println(dc);

        // some other code
    }

问题陈述：-

现在有什么方法，我可以从一些标头中提取IP地址吗？意思是我想知道从哪个IP地址，呼叫来了，意思是谁在上面调用URL，我需要知道他们的IP地址。这可能吗？

Answer 1

我用这样的方法来做这件事

public class HttpReqRespUtils {

    private static final String[] IP_HEADER_CANDIDATES = {
        "X-Forwarded-For",
        "Proxy-Client-IP",
        "WL-Proxy-Client-IP",
        "HTTP_X_FORWARDED_FOR",
        "HTTP_X_FORWARDED",
        "HTTP_X_CLUSTER_CLIENT_IP",
        "HTTP_CLIENT_IP",
        "HTTP_FORWARDED_FOR",
        "HTTP_FORWARDED",
        "HTTP_VIA",
        "REMOTE_ADDR"
    };

    public static String getClientIpAddressIfServletRequestExist() {

        if (RequestContextHolder.getRequestAttributes() == null) {
            return "0.0.0.0";
        }

        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        for (String header: IP_HEADER_CANDIDATES) {
            String ipList = request.getHeader(header);
            if (ipList != null && ipList.length() != 0 && !"unknown".equalsIgnoreCase(ipList)) {
                String ip = ipList.split(",")[0];
                return ip;
            }
        }

        return request.getRemoteAddr();
    }
}

Answer 2

我来晚了，但这可能有助于寻找答案。通常servletRequest。getRemoteAddr（）工作正常。

在许多情况下，您的应用程序用户可能通过代理服务器访问您的web服务器，或者您的应用程序位于负载平衡器之后。

因此，在这种情况下，您应该访问X-Forwarded-For-http标头以获取用户的IP地址。

String ipAddress=request.getHeader（"X-FORWARDED-FOR"）；

希望这有帮助。

Answer 3

解决方案是

@RequestMapping(value = "processing", method = RequestMethod.GET)
public @ResponseBody ProcessResponse processData(@RequestParam("workflow") final String workflow,
    @RequestParam("conf") final String value, @RequestParam("dc") final String dc, HttpServletRequest request) {

        System.out.println(workflow);
        System.out.println(value);
        System.out.println(dc);
        System.out.println(request.getRemoteAddr());
        // some other code
    }

将HttpServletRequest添加到您的方法定义中，然后使用Servlet API

Spring文档在这里说

15.3.2.3支持的处理程序方法参数和返回类型

Handler methods that are annotated with @RequestMapping can have very flexible signatures.
Most of them can be used in arbitrary order (see below for more details).

Request or response objects (Servlet API). Choose any specific request or response type,
for example ServletRequest or HttpServletRequest