问题描述
我已在这里阅读这个问题：
了解第三方跟踪Cookie的工作方式，但仍然很困惑。
我不明白如果我访问网站A（一个有广告的正常网站）如何网站B（广告网站）可以分配我的电脑的ID，然后弄清楚我在网站A和其他
I have read this question here:How Do Internet Advertisers Use Third-Party Cookies?on how third-party tracking cookies work, but am still very confused.I don't understand how if I visit Website A (a normal website with ads) how Website B (an advertising website) can assign my computer an ID, and then figure out that I was on website A, and other websites after it that have its ads.
推荐答案
首先，通过HTTP标头设置和检索Cookie。如果您的浏览器向发送请求，则响应可能会返回一个标题为 Set-Cookie：foo = bar 。您的浏览器存储此Cookie，并且对的任何后续请求，您的浏览器将发送 foo = bar 中的。 （或至少直到cookie过期或被删除。）浏览器发送 foo = bar cookie与任何请求到，无论发起请求的人或上下文是什么。如果包含标记< img src =http://example.com/img .jpg> ，那么浏览器在获取，即使
First, cookies are set and retrieved through HTTP headers. If your browser sends a request to http://example.com, then the response might come back with a header that says Set-Cookie: foo=bar. Your browser stores this cookie, and on any subsequent requests to http://example.com, your browser will send foo=bar in the Cookie header. (Or at least until the cookie expires or is deleted.) The browser sends the foo=bar cookie with any request to http://example.com, regardless of who initiated the request or what the context is. If http://example2.com contains the tag <img src="http://example.com/img.jpg">, then the browser will send the cookie foo=bar when it fetches http://example.com/img.jpg, even though http://example2.com is responsible for the request being sent.
因此，如果网站A包含由网站B投放的广告，则网站B可以在您的浏览器中设置Cookie。例如，或许网站A使用< iframe src =http://websiteB.com/ad.html></iframe> 从网站B投放广告。然后当你的浏览器访问 http://websiteB.com/ad.html 时，响应将返回一个 Set-Cookie 标头，用于设置一个具有唯一随机字符串的Cookie。如果网站C还包含来自网站B的广告，那么当网站C上的广告从网站B获取时，将发送该唯一Cookie。
So, if website A contains an ad that is served by website B, then website B can set a cookie in your browser. For example, maybe website A uses <iframe src="http://websiteB.com/ad.html></iframe> to serve the ad from website B. Then when your browser goes to fetch http://websiteB.com/ad.html, the response will come back with a Set-Cookie header that sets a cookie with some unique random string. If website C also includes an ad from website B, then that unique cookie will be sent when the ad on website C is fetched from website B.
至于网站B如何知道您访问的是哪个实际网站，有多种方法。在某些情况下，当浏览器向一个网站发送请求时，因此，当浏览器访问 http://websiteB.com/ad.html 时，它可能包含HTTP标头 Referer：http://websiteA.com 告诉网站B请求是由网站A发起的。每当网站B看到它分配给您的唯一随机字符串时，它可以检查Referer标头以添加到您的历史记录。如果网站A与网站B合作，则A可以直接告诉B您来自网站A.例如，网站A可以通过使用< iframe src =来包括来自网站B的广告， http://websiteB.com/ad.html?referer=websiteA.com> ，然后网站B就会在查询字符串中看到引荐来源。
As far as how website B knows which actual website you're visiting, there are a variety of ways. In some cases, when the browser sends a request to one website, it tells the website which website you're coming from. So when the browser goes to fetch http://websiteB.com/ad.html, it might include the HTTP header Referer: http://websiteA.com that tells website B that the request was initiated by website A. Every time website B sees the unique random string that it assigned to you, it can check the Referer header to add to its log of where you've been. If website A is cooperating with website B, A can just directly tell B that you're coming from website A. For example, website A could include the ad from website B by using <iframe src="http://websiteB.com/ad.html?referer=websiteA.com">, and then website B will see the referer in the query string.
这有帮助吗？你链接的答案中有什么特定部分对你没有意义吗？
Does that help? Are there particular parts of the answer you linked that don't make sense to you?
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