How to refer uploads files

[Chaitu P]

I want to compile the files that were uploaded. But the files are getting uploaded with some random name. So how can I refer them.

[Massimo Di Pierro]

Do not understand the question.

[Mandar Vaze]

On Thursday, June 25, 2015 at 1:47:13 PM UTC+5:30, Chaitu P wrote:

I want to compile the files that were uploaded. But the files are getting uploaded with some random name. So how can I refer them.

Filenames under uploads folder are purposely mangled (what you call random names) for security reasons.

What you want to do is unclear though 

Do you want to list all the "actual" filenames under uploads folder?

If that is the case, you can look at retrieve method here : http://www.web2py.com/books/default/chapter/29/06/the-database-abstraction-layer#More-on-uploads

-Mandar

[Anthony]

The original filename is encoded in the new filename. However, if you need easier access to the original filename (without bothering with the decoding), you can store the original filename in a separate field. For details, see http://www.web2py.com/books/default/chapter/29/07/forms-and-validators#Storing-the-original-filename.

Anthony

[Manuele Pesenti]

Il 24/06/15 21:23, Chaitu P ha scritto:

> I want to compile the files that were uploaded. But the files are
> getting uploaded with some random name. So how can I refer them.

Please give more ditails of what you are trying to do... I guess you are
using a "no dal" form to upload your files... right?

M.

[Chaitu P]

I have form where student can upload his c programs. Now I want to write a script which will compile and run these programs.

I was able to write a script which can compile and run c programs with simple name like hello.c. But the problem is Iam not sure how can I refer the files that were saved with random names in uploads folder, for execution.

Here is my code.

import time

import subprocess

while True:

rows = db(db.student.status=='pending').select()

ofile = open('C:\\web2py\\applications\\newdropboxmultiupload\\cache\\temp\\hellonewtest.out', 'w')

for row in rows:

#subprocess.call(["gcc","C:\web2py\hello.c","-o","x"])

subprocess.call(["./x"], stdout=ofile)

row.update_record(status='executed')

db.commit()

time.sleep(60) # check every minute

ofile.close()

[Chaitu P]

I have a form where student can submit his .c programs. Now I want to write a script that run these programs. I was able compile and run c programs with a python scripts with normal name like hello.c. But Iam not sure how can refer these programs that were saved with random name. Here is my script.

## in file /app/private/mail_queue.py

import time

import subprocess

while True:

rows = db(db.student.status=='pending').select()

ofile = open('C:\\web2py\\applications\\newdropboxmultiupload\\cache\\temp\\hellonewtest.out', 'w')

for row in rows:

subprocess.call(["gcc","C:\web2py\hello.c","-o","x"])

subprocess.call(["./x"], stdout=ofile)

row.update_record(status='executed')

db.commit()

time.sleep(60) # check every minute

ofile.close()

    M.

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[Anthony]

When you create an upload field using the DAL, the filename is stored in the upload field itself, so you can get the filepath via:

import os
filepath = os.path.join(request.folder, 'uploads', row.upload_field_name)

The above assumes all uploads go directly in the /uploads folder. If you have specified an alternative upload folder, you will need to use that instead of "uploads" (also, if you set uploadseparate=True, that will take some extra work to get the full path).

Anthony

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Chaitanya Pochampally