Unnecessarily put in af:form usesUpload = true, a good idea

Anyone know if the attribute of usesUpload af:form true regardless if we use a tag af:inputFile a good idea?

Why I asked:

We have set up a page template to can be used by many applications. The default model injects an af:form among others tag in an application page by using the template. Our applications via ADF feature libraries do use bounded workflows based on fragments of the page within the regions, in our application pages, which in turn use the page template.

Each bounded workflow functionality is really defined task flow itself. In theory the stubborn workflows can include a page fragment that uses the tag af:inputFile. In order to support the component af:inputFile the tag of af: parent must have form it's usesUpload attribute set to true. However, in the case of the page fragment the form tag does not in the fragment, but rather in the page template which includes the region containing the stubborn workflow. As such, seems, it turns out to be necessary in order for the page template / workflow support different delimited area use cases that may or may not use af:inputFile, we need the af usesUpload: form = true nevertheless.

But my concern is, there will also be bounded task flows which do not use the tag af:inputFile. So if we set usesUpload = true unnecessarily will be setting us up? Is it a bad idea to set it to true when you're not you transfer files?

See you soon,.

CM.

Chris,

Within the ADF faces when there is a file in the MESSAGE, we do a backup of an AJAX post in a former type of coding for the publication of HTML form via an iframe hidden with multipart/form-data specified as its form. It's a more verbose mechanism and the syntax for the data transmission.

If the input file has no file or there is no inputFile components in the form, we do not have relief. We produce a regular XHR post to the server. So only when the MESSAGE actually contains a file there is no impact.

That said, it just doesn't feel good to always set usesUpload = true, even if you never ever use to download a file. Your first thought to include an attribute in an exculpatory as suggested by jurkiri is more elegant. It is the approach taken in the adf-richclient-demo.

The other approach, you mentioned (i.e., set the attribute on the tag form programmatically when a stubborn workflow is called) will involve a few extra minutes. However, the client library is smart enough to not joking don't not with the actual MESSAGE. Again, it is all in the ADF Faces.

Outside of the ADF Faces , it is a very bad idea to have always enctype = "multipart/form-data" on the HTML

element.
It generates a bigger POST request because of the http headers, and it simply does not make sense.

So bottom line:

In ADF Faces Rich Client, there is NO downside to always have usesUpload = true.

Outside the ADF Faces, his is a very bad idea.

In both cases, it is more elegant to just set usesUpload = true if really needed.

Tags: Java

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