如何设置嵌入在特殊非http URL中的URL的Cache

如何设置嵌入在特殊非http URL中的URL的Cache-Control（Python / Django）(How to set Cache-Control of a URL embedded within a special non-http URL (Python/Django))

背景：

在我的Django view的form_valid方法中，我正在通过字符串连接构造一个URL。 想象一下，所述URL为http://example.com/uuid ，其中uuid是传递给此form_valid方法的POST变量。

在这个方法中，我接下来将构建一个自定义的HttpResponse对象，该对象将导致非http url，为nonhttp_url = "sms:"+phonenumber+"?body="+body 。 body包含一些文本和我之前通过字符串连接形成的url（例如'go to this url： [url] '）。 phonenumber是任何合法的手机号码。

这样构造的HttpResponse对象实际上是一个HTML技巧，用于打开手机的本机SMS应用程序并预​​先填写电话号码和SMS正文。 它的常见用法是<a href="sms:phonenumber?body="+body">Send SMS</a> 。我实际上是在调用相同的东西，但是从我的Django视图的form_valid方法中调用。

题：

如何确保我通过上面的str连接形成的URL并传递到非http url的body部分，并将Cache-Control设置为no-cache ？ 事实上，我也想要no-store和must-revalidate 。 同样，我还需要将Pragma设置为no-cache ，将Expires设置为0并将Vary设置为* 。

当前代码：

class UserPhoneNumberView(FormView): form_class = UserPhoneNumberForm template_name = "get_user_phonenumber.html" def form_valid(self, form): phonenumber = self.request.POST.get("mobile_number") unique = self.request.POST.get("unique") url = "http://example.com/"+unique response = HttpResponse("", status=302) body = "See this url: "+url nonhttp_url = "sms:"+phonenumber+"?body="+body response['Location'] = nonhttp_url return response

BACKGROUND:

In the form_valid method of a Django view of mine, I am constructing a URL via string concatenation. Imagine the said URL to be http://example.com/uuid, where uuid is a POST variable passed to this form_valid method.

In this method, I will next be constructing a custom HttpResponse object that will lead to a non-http url, being nonhttp_url = "sms:"+phonenumber+"?body="+body. body contains some text and the url I formed earlier via string concatenation (e.g. 'go to this url: [url]'). phonenumber is any legit mobile number.

The HttpResponse object thus constructed is actually an HTML trick that is used to open the native SMS app of a phone and pre-fill it with a phone number and SMS body. It's common usage is <a href="sms:phonenumber?body="+body">Send SMS</a>. I'm essentially calling the same thing, but from inside the form_valid method of my Django view.

QUESTION:

How do I ensure that the URL I formed via str concatenation above and passed into the body section of the non-http url has Cache-Control set to no-cache? In fact, I also want no-store and must-revalidate. Similarly, I also need Pragma set to no-cache, Expires set to 0 and Vary set to *.

CURRENT CODE:

class UserPhoneNumberView(FormView): form_class = UserPhoneNumberForm template_name = "get_user_phonenumber.html" def form_valid(self, form): phonenumber = self.request.POST.get("mobile_number") unique = self.request.POST.get("unique") url = "http://example.com/"+unique response = HttpResponse("", status=302) body = "See this url: "+url nonhttp_url = "sms:"+phonenumber+"?body="+body response['Location'] = nonhttp_url return response

最满意答案

我认为你会像对待HTTP URL那样做吗？ 您可以使用响应作为字典来设置标头，就像使用Location标头一样。 在这种情况下，添加如下行： response['Vary'] = '*' 。

为方便起见，您可以使用add_never_cache_headers()添加Cache-Control和Expires标头。

这是一个例子：

from django.utils.cache import add_never_cache_headers class UserPhoneNumberView(FormView): form_class = UserPhoneNumberForm template_name = "get_user_phonenumber.html" def form_valid(self, form): phonenumber = self.request.POST.get("mobile_number") unique = self.request.POST.get("unique") url = "http://example.com/"+unique response = HttpResponse("", status=302) body = "See this url: "+url nonhttp_url = "sms:"+phonenumber+"?body="+body response['Location'] = nonhttp_url # This will add the proper Cache-Control and Expires add_never_cache_headers(response) # Now just add the 'Vary' header response['Vary'] = '*' return response

I'd think that you'd do it just as you would for an HTTP URL? You'd set the headers by using the response as a dictionary, just like you are for the Location header. In this case, adding lines like: response['Vary'] = '*'.

As a convenience, you could use add_never_cache_headers() to add the Cache-Control and Expires headers.

Here's an example:

from django.utils.cache import add_never_cache_headers class UserPhoneNumberView(FormView): form_class = UserPhoneNumberForm template_name = "get_user_phonenumber.html" def form_valid(self, form): phonenumber = self.request.POST.get("mobile_number") unique = self.request.POST.get("unique") url = "http://example.com/"+unique response = HttpResponse("", status=302) body = "See this url: "+url nonhttp_url = "sms:"+phonenumber+"?body="+body response['Location'] = nonhttp_url # This will add the proper Cache-Control and Expires add_never_cache_headers(response) # Now just add the 'Vary' header response['Vary'] = '*' return response