CFFILE - Uploading a file using a component

问题

I have a form that I would like to submit to a component for processing (CRUD behaviors), the problem is it seems passing multipart/form-data to a component somehow looses the file location. When it gets to the part of the component that should be uploading the file I get the infamous form field did not contain a file error.

I am not 100% sure why this happening but if I submit the form directly to a .cfm page that performs the cffile action everything works as expected, but if the .cfm page does something like:

<cfobject name="process_form" component="processor" />
<cfset result = process_form.upload( form ) />

and the component "processor" tries to do the upload, I get the form field did not contain a file.

My processor looks like:

    <cfcomponent name="processor">
      <cffunction name="upload" returntype="string">
      <cfargument name="form_data" type="struct" />
      <cffile action="upload" filefield="#arguments.form_data.file_1#" ...>
          [ ... ]
      </cffunction>
    </cfcomponent>

One thing to note, is if I try use the variable arguments.form_data.file_1 without the # signs around it, I get the error:

The form field arguments.form_data.file_1 did not contain a file.

If I put the # signs around the variable I get:

The form field C:\JRun4\servers\cfusion\SERVER-INF\temp\cfusion-war-tmp\neotmp7350969777287007477.tmp did not contain a file. 

Any idea on how to fix this issue? I would rather have all my processing actions inside a component, but right now I can't seem to make that work.

Thanks! Will

回答1:

You shouldn't need to use the full variable name when using a cffile tag--you just need the form field name, so something like:

<cffile action="upload" filefield="file_1" ...>

should suffice. The FORM struct field holds the location of the temporary file, but the cffile tag doesn't need that (I'd image that id directly accesses the FORM struct on the backend based on the fieldname you've provided).

来源：https://stackoverflow.com/questions/7852252/cffile-uploading-a-file-using-a-component