blocks|key|2462881|text|你的方法运行得很好，另一种方法是使用DateTime.UtcNow.Ticks。当然，您也可以使用cache+control+headers，但如果您想绝对确定，您所使用的方法就是最佳选择。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2462882|但是，如果您无论如何都是动态生成文件，并且需要将其包含在page...any中，那么为什么不只是将JavaScript粘贴到页面中呢？由于您希望它永远不缓存，这将为客户端节省一次往返。|2462883|entityMap|0|LINK|mutability|MUTABLE|url|http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html^0|I|L|1D|L|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

The method you have works just fine, an alternative would be to use <code>DateTime.UtcNow.Ticks</code>. You can of course use <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html" rel="nofollow noreferrer">cache control headers</a>, but if you want to be absolutely sure, the method you have is the way to go.

Though, if you're generating the file dynamically anyway, and need to include it in the page...any reason for not just sticking the JavaScript in the page? Since you want it to never cache, this will save a round-trip for the client.

blocks|key|1496243|text|是的那很好。我个人也是这样做的，但我使用的是时间戳，这确保了它始终是唯一的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1496244|entityMap^0|M|3|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Yes that is good. I personally do the same but I use timestamp instead which makes sure that it is always unique.

blocks|key|750209|text|您可以考虑使用HTTP+Etags|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|750210|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/HTTP_ETag^0|7|A|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You might consider using <a href="http://en.wikipedia.org/wiki/HTTP_ETag" rel="nofollow noreferrer">HTTP Etags</a>

blocks|key|2463003|text|这是人们通常的做法。您还可以更改每个请求的文件名，以确保完全确定。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2463004|像<script+src="{unique+string}.js">这样的东西|offset|length|style|CODE|2463005|entityMap^0|0|1|X|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

That's a usual way how people do it. You can also change the filename for each requests to be completely sure.

something like <code>&lt;script src="{unique string}.js"&gt;</code>

blocks|key|750282|text|您可以创建自定义操作属性：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|750283|public+class+NoCacheAttribute+:+ActionFilterAttribute
{++
++++public+override+void+OnResultExecuting(ResultExecutingContext+filterContext)
++++{
++++++++var+cache+=+filterContext.HttpContext.Response.Cache;
++++++++cache.SetExpires(DateTime.UtcNow.AddDays(-1));
++++++++cache.SetValidUntilExpires(false);
++++++++cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
++++++++cache.SetCacheability(HttpCacheability.NoCache);
++++++++cache.SetNoStore();
++++++++base.OnResultExecuting(filterContext);
++++}
}|code-block|syntax|javascript|750284|然后用这个属性修饰生成javascript的控制器操作：|750285|[NoCache]
public+ActionResult+MyAction()
{
++++...
}|750286|在这种情况下，您不再需要附加的随机字符串。|750287|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You could create a custom action attribute:

<pre><code>public class NoCacheAttribute : ActionFilterAttribute
{ 
 public override void OnResultExecuting(ResultExecutingContext filterContext)
 {
 var cache = filterContext.HttpContext.Response.Cache;
 cache.SetExpires(DateTime.UtcNow.AddDays(-1));
 cache.SetValidUntilExpires(false);
 cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
 cache.SetCacheability(HttpCacheability.NoCache);
 cache.SetNoStore();
 base.OnResultExecuting(filterContext);
 }
}
</code></pre>

And then decorate the controller action that generates javascript with this attribute:

<pre><code>[NoCache]
public ActionResult MyAction()
{
 ...
}
</code></pre>

In this case you no longer need the random string you are appending.

blocks|key|2463085|text|在响应中使用缓存控制HTTP标头。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2463086|Cache-Control:+no-cache|code-block|syntax|javascript|2463087|(因此，这纯粹是一个服务器设置，不需要编码。)|2463088|或者，当您使用HTML时，使用路由来忽略ASP.NET的最后一个元素，在have|2463089|<script+type="text/javascript"+src="/js/dynamic.js/979F861A-C487-4AA8-8BD6-84E7988BD460"></script>|2463090|并使用MVC路由忽略后缀(即使每个HTML页面具有不同的脚本URL，而不仅仅是查询参数)。|2463091|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Use the cache control HTTP headers in the response.

<pre><code>Cache-Control: no-cache
</code></pre>

(This is therefore purely a server setting, no coding needed.)

Alternately, as you are using ASP.NET MVC, use routing to ignore the last element of the URL, in the HTML have

<pre><code>&lt;script type="text/javascript" src="/js/dynamic.js/979F861A-C487-4AA8-8BD6-84E7988BD460"&gt;&lt;/script&gt;
</code></pre>

and use the MVC route to ignore the suffix (i.e. make every HTML page served have a different script URL, not just a query parameter).

I have a dynamically-generated javascript file that I want to ensure is NEVER cached by the browser. My current method is to simply append a (new) guid to the url in the script tag on each page view.

For example:

<pre><code>&lt;script type="text/javascript" src="/js/dynamic.js?rand=979F861A-C487-4AA8-8BD6-84E7988BD460"&gt;&lt;/script&gt;
</code></pre>

My question is...is this the best way to accomplish my goal?

For reference, I am using ASP.NET MVC 2 and the javascript file is being generated as a result of a controller action.

How can I ensure a dynamically-generated javascript file is never cached?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个动态生成的javascript文件，我想确保它永远不会被浏览器缓存。我目前的方法是在每个页面视图的script标签中简单地附加一个(新的) guid到url。例如：<script type="text/javascript" src="/js/dynamic.js?rand=979F861A-C487-4AA8...

问如何确保动态生成的javascript文件永远不会被缓存？
EN

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问如何确保动态生成的javascript文件永远不会被缓存？EN