librelist archives

File reading problem

File reading problem by shantala
- Re: [flask] File reading problem by Armin Ronacher
  - Re: [flask] File reading problem by Shantala
    - Re: [flask] File reading problem by shantala

File reading problem

From:: shantala
Date:: 2011-09-05 @ 10:04

Hi,
  I am attaching a file in a mail I am sending using flask framework.
I use  request.files['file1'] for the same.
But in the view  when I try to read the file in the buffer as :
     if file1.filename:
             chunk = file1.read()

It throws up internal server error if the file size is more than 498 Kb. 
For file size less than that , there is no problem. However, I am able 
to upload a file of any size on the  server. I just want to read the 
file into a buffer, rather than upload onto the server.

This code otherwise works from a cgi-script, where I can control the 
size of the buffer, without Flask implementation.

Can anybody help me on this?


//

-- 
rgds...Shantala
Yukthi Systems Pvt. Ltd.
Bangalore-25

Re: [flask] File reading problem

From:: Armin Ronacher
Date:: 2011-09-05 @ 11:28

Hi,

On 2011-09-05 12:04 PM, shantala wrote:
> It throws up internal server error if the file size is more than 498 Kb.
> For file size less than that , there is no problem. However, I am able
> to upload a file of any size on the server. I just want to read the file
> into a buffer, rather than upload onto the server.
Sounds like you are hitting a memory limit from your server.  Why do you 
need everything in memory at once?


Regards,
Armin

Re: [flask] File reading problem

From:: Shantala
Date:: 2011-09-06 @ 04:04

Hi, As stated earlier, I want to send this file as attachment, I am 
reading its content into a buffer.
This works in the cgi-script as I have mentioned earlier, but not in the 
flask implementation.

On Monday 05 September 2011 04:58 PM, Armin Ronacher wrote:
> Hi,
>
> On 2011-09-05 12:04 PM, shantala wrote:
>    
>> It throws up internal server error if the file size is more than 498 Kb.
>> For file size less than that , there is no problem. However, I am able
>> to upload a file of any size on the server. I just want to read the file
>> into a buffer, rather than upload onto the server.
>>      
> Sounds like you are hitting a memory limit from your server.  Why do you
> need everything in memory at once?
>
>
> Regards,
> Armin
>    

-- 
--
Thanks&  rgds...
Shantala

Re: [flask] File reading problem

From:: shantala
Date:: 2011-09-10 @ 06:50

Hi,
Anyone could crack it?
Snippets of code below:

In combine.html

<br>Attachment File 3:<input type="file" name="file3"><br></td>
.
.
.
In views.py

@app.route('/tomail1', methods=['GET','POST'])
def showmassmail_page():
      if request.method == 'POST':
                 file3 = request.files['file3']
                 .
                 .
                 .
                  m = create_msg(userid, ,, file1, file2, file3 )

Then in
def create_msg(userid, ,, file1, file2, file3):

     if file3:
          ofile3 = file3
          fnm33 = file3.filename
          fnm3 = os.path.basename(fnm33)
          chunk3 = ofile3.read(1024000)

# excluded all the other parameters from the actual code
     mess1 = sendMail(fromId, , ,
                                              subjectLine, message, chunk,
                                              fnm, chunk2, fnm2, chunk3, 
fnm3)

In
def sendMail(fromLine, , , , fchunk, fnm,
             fchunk2, fnm2, fchunk3, fnm3):

if fchunk:
         part = MIMEBase('application', "octet-stream")
         part.set_payload(fchunk)
         Encoders.encode_base64(part)
         part.add_header('Content-Disposition', 'attachment; filename="%s"'
                         % fnm)
         msg.attach(part)

     if fchunk2:
         part2 = MIMEBase('application', "octet-stream")
         part2.set_payload(fchunk2)
         Encoders.encode_base64(part2)
         part2.add_header('Content-Disposition', 'attachment; filename="%s"'
                          % fnm2)
         msg.attach(part2)

     if fchunk3:
         part3 = MIMEBase('application', "octet-stream")
         part3.set_payload(fchunk3)
         Encoders.encode_base64(part3)
         print part3
         part3.add_header('Content-Disposition', 'attachment; filename="%s"'
                          % fnm3)
         msg.attach(part3)
     return msg.as_string()



Then compose the mail and send using SMTP. I am sending the file as 
email attachment.
I want to restrict the file attachment size to 1MB using flask. Can 
anyone help me with detailed code.

)

Here I want to limit the size of the uploaded file upto 1 MB.


Thanks in advance.



On 09/06/2011 09:34 AM, Shantala wrote:
> Hi, As stated earlier, I want to send this file as attachment, I am
> reading its content into a buffer.
> This works in the cgi-script as I have mentioned earlier, but not in the
> flask implementation.
>
> On Monday 05 September 2011 04:58 PM, Armin Ronacher wrote:
>> Hi,
>>
>> On 2011-09-05 12:04 PM, shantala wrote:
>>
>>> It throws up internal server error if the file size is more than 498 Kb.
>>> For file size less than that , there is no problem. However, I am able
>>> to upload a file of any size on the server. I just want to read the file
>>> into a buffer, rather than upload onto the server.
>>>
>> Sounds like you are hitting a memory limit from your server.  Why do you
>> need everything in memory at once?
>>
>>
>> Regards,
>> Armin
>>


-- 
rgds...Shantala