I am wondering if there is a safer way to use ColdFusion CFFILE to upload files to Of course, you only perform the image tests if the file uploaded is an image. You may want to use a third party tool like Alagad Image CFC or ColdFusion 8’s built in image support to not only confirm that the file is indeed. On UNIX systems should also restrict access to the uploaded file by specifying the mode attribute, preferably so that only the ColdFusion process can read.
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For example, if you specify the destination, C: Indicates Yes or No whether or not the file already existed with the same path.
The cfvile file upload status parameters are available after an upload: TimeCreated Time the uploaded file was created. The status parameters use the cffile prefix; for example, cffile.
cffile action = “upload”
ServerFileName Filename, without an extension, of the uploaded file on the server. OS permissions allow only j2ee to write, any can read.
Just so I’m clear: I’d just like to point out, in response to the first commenter, that Mac OS X files do indeed have file extensions. One attribute Windows or a comma-delimited list of attributes other platforms to set on the file. Initial name ColdFusion used when attempting to save a file. Email Required, but never uoload. The accept attribute gives a terrible false sense of security.
Lets you specify a name for the variable in which cffile returns the result or status parameters. They are set to the results of the most recent cffile operation. The strict attribute has been added in ColdFusion Post as a guest Name. Extension of the uploaded file on the server, without a period, for example, txt not. Date and time the uploaded file was last accessed.
This should do it but unfortunately ojly my test when I tried uploading non text file I got ColdFusion error:. It’s best to strip out non alpha numeric characters perhaps with the exception of dash and underscore. If you are using the Enterprise edition of ColdFusion you can setup a sandbox for your file upload directory, and remove execute permission.
ClientFileName Filename without an extension of the uploaded file on the client’s system. After a file upload is completed, you can get status information using file upload parameters.
Tips for Secure File Uploads with ColdFusion
So here are some tips to help make this process more secure. If possible upload content to a server other than the application server, a server that only serves static content for example Amazon S3.
Second, I do the same extension validation on the server side. Name of form field used to select the file. Make sure you treat whatever uploaded as something potentially malicious and do not process them e.
Status parameters can be used anywhere other ColdFusion parameters can be used.
He has been developing with ColdFusion since version 4 and is an active member of the ColdFusion community. Thanks onlh the tips. The default is kind of high, if you don’t have a lot of large file uploads going on at the same time this should be lowered to say 50mb it shouldn’t be lower than the Maximum size cffkle post data, or the Request Throttle Threshold, but it could be equal to the max size.
The default behavior of the file upload should be to delete the file if it does not pass a validation check. In some cases this ctfile not possible, but seriously consider this as it does ease the risk significantly. FYI you can set accept to. Octal values of chmod command.