document.referrer存在，但始终为空 [英] document.referrer exists but is always empty
问题描述
我正在iOS 8上的移动应用程序上工作。document.referrer似乎总是空的。我尝试使用以下方法检查它是否存在：
I am working on a mobile application on iOS 8. document.referrer seems to always be empty. I have tried to check if it exists by using:
if( 'referrer' in document ) {
alert('referrer ' + document.referrer);
}
它会发出警报，但无论我是从另一个页面访问它，或者如果我是第一次访问该页面。我还添加了元标记：
and it throws an alert, but the value is always empty, whether I am accessing it from another page or if I am accessing the page for the first time. I have also included the meta tag:
<meta name="referrer" content="always">
我如何获得document.referrer的价值？
How do I get the value of document.referrer?
编辑：我也忘了提一下，我不在本地iOS应用程序上工作。我正在使用cordova以及HTML5和JS。
I also forgot to mention, that I am not working on a native iOS app. I am using cordova and HTML5 and JS.
推荐答案
由于我们对您的本机包装一无所知，因此可能发生了两件事：
Since we don't know anything about your native wrapper, it's possible there are a couple of things going on:
-
document.referrer来自HTTP标头Referer（请注意历史拼写错误）。您的iOS代码中可能有某些内容正在设置或抑制该HTTP标头。
document.referreris derived from the HTTP headerReferer(note historical misspelling). It's possible that something in your iOS code is setting or suppressing that HTTP header.
如果您的Web应用是使用带有文件的URL托管的模式（如 file：///foo.html ），浏览器引擎将不会设置HTTP Referer 标头可防止敏感信息泄漏。 （例如，如果您有一个链接到远程站点的本地网页，则不想将本地文件名发送到远程Web服务器。）
If your web app is hosted using URLs with file schema (as in file:///foo.html), browser engines will not set the HTTP Referer header to prevent leakage of sensitive information. (You wouldn't want to send local filenames to a remote webserver if, for example, you had a local webpage that linked out to a remote site.)
如果发现其中之一正在发生，则可以按照
If you find that one of these is happening, you can manually set the Referer header as described in "Specifying HTTP referer in embedded UIWebView"
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