Referer 알아내기 in Server (Vert.x) and Client (HTML/javascript)

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Mode: Bright; Font: Noto Sans KR; font-size: 18.0px (10.0); line-height: 1.6;
width: 1280, height: 720, version: 2.12.18
Canonical URI: https://kipid.tistory.com/entry/Referrer-in-Server-Vert-x-and-Client-javascript
dg:plink (Document Global Permanent Link): https://kipid.tistory.com/254
document.referrer: Empty

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Referer 알아내기 in Server (Vert.x) and Client (HTML/javascript)

Client (방문객) 이 어느 경로를 통해 들어왔는지, 어느 검색어를 통해 어느 검색엔진을 통해 들어왔는지 등을 알아내려면 어떻게 해야할까?

Vert.x 랑 javascript 에서 쓰이는 referer/referrer 철자 (spelling) 가 다르네? ㅡㅂㅡ;;;

TPH.Posting History

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• 2023-11-04 : Update window.kipid to window.m.
• 2023-02-27 : First posting.

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PH.Posting History

1.Referer in Vert.x server

2.Document.referrer in HTML/Javascript

Refs.References and Related Articles

T1.Referer in Vert.x server

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참고

[01]

Ref. [01] https://vertx.io/

.

import io.vertx.core.AbstractVerticle;
import io.vertx.core.http.HttpServerRequest;

import io.vertx.ext.web.Router;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;



public class Recoeve extends AbstractVerticle {
	public static final String host="recoeve.net";
	public static final String ENCODING="UTF-8";
	public static final String INVALID_ACCESS="INVALID ACCESS";
	private static long numberOfClients;
	static {
		numberOfClients=0;
	}

	@Override
public void start() {
	Router router=Router.router(vertx);

	router.route().handler(ctx -> {
		HttpServerRequest req=ctx.request();
		System.out.println("\n\nA client has connected!: "+(++numberOfClients));
		final String referer=req.headers().get("Referer");
		if (referer!=null) {
			try {
				System.out.println("Referer: "+URLDecoder.decode(referer, "UTF-8"));
			} catch (UnsupportedEncodingException e) {
				System.out.println(e);
			}
		}
		else {
			System.out.println("Referer: null");
		}

		if (referer.substring(0,4).toLowerCase().equals("http")) {
			int k=4;
			if (referer.charAt(k)=='s'||referer.charAt(k)=='S') {
				k++;
			}
			if (referer.startsWith("://",k)) {
				k+=3;
				int l=referer.indexOf('/',k);
				String refererHost=null;
				if (l==-1) {
					refererHost=referer.substring(k);
				}
				else {
					refererHost=referer.substring(k,l);
				}
				System.out.println("Referer Host: "+refererHost);
			}
		}

		try {
			System.out.println("Absolute URI: "+URLDecoder.decode(req.absoluteURI(), "UTF-8"));
		} catch (UnsupportedEncodingException e) {
			System.out.println(e);
		}

		req.response().putHeader("Content-Type","text/plain; charset=utf-8");
		req.response().end(INVALID_ACCESS, ENCODING);
		System.out.println(INVALID_ACCESS);
	});

	vertx.createHttpServer()
		.requestHandler(router).listen(80);
} // public void start()
} // public class Recoeve extends AbstractVerticle

// Log Example
A client has connected!: 208
Referer: https://recoeve.net/CDN/docuK-2.3.css
Referer Host: recoeve.net
Absolute URI: https://recoeve.net/CDN/cc.png

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T2.Document.referrer in HTML/Javascript

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참고

[02]

Ref. [02] MDN :: API - Document.referrer

.

document.referrer: Empty

<script>
let referrer=document.referrer;
let referrerHTML=(referrer?`<a target="_blank" href="${referrer}">${m.escapeHTML(decodeURIComponent(referrer))}</a>`:`Empty`);
$("#pre-result").html(`document.referrer: ${referrerHTML}`);
</script>

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TRefs.References and Related Articles

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1. Ref. [01] https://vertx.io/
2. Ref. [02] MDN :: API - Document.referrer

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