Django File upload size limit

I believe that django form receives file only after it was uploaded completely.That's why if somebody uploads 2Gb file, you're much better off with web-server checking for size on-the-fly.

See this mail thread for more info.

This code might help:

# Add to your settings file
CONTENT_TYPES = ['image', 'video']
# 2.5MB - 2621440
# 5MB - 5242880
# 10MB - 10485760
# 20MB - 20971520
# 50MB - 5242880
# 100MB 104857600
# 250MB - 214958080
# 500MB - 429916160
MAX_UPLOAD_SIZE = "5242880"

#Add to a form containing a FileField and change the field names accordingly.
from django.template.defaultfilters import filesizeformat
from django.utils.translation import ugettext_lazy as _
from django.conf import settings
def clean_content(self):
    content = self.cleaned_data['content']
    content_type = content.content_type.split('/')[0]
    if content_type in settings.CONTENT_TYPES:
        if content._size > settings.MAX_UPLOAD_SIZE:
            raise forms.ValidationError(_('Please keep filesize under %s. Current filesize %s') % (filesizeformat(settings.MAX_UPLOAD_SIZE), filesizeformat(content._size)))
    else:
        raise forms.ValidationError(_('File type is not supported'))
    return content

Taken from: Django Snippets - Validate by file content type and size

You can use this snippet formatChecker. What it does is

• it lets you specify what file formats are allowed to be uploaded.

• and lets you set the limit of file size of the file to be uploaded.

First. Create a file named formatChecker.py inside the app where the you have the model that has the FileField that you want to accept a certain file type.

This is your formatChecker.py:

from django.db.models import FileField
from django.forms import forms
from django.template.defaultfilters import filesizeformat
from django.utils.translation import ugettext_lazy as _

class ContentTypeRestrictedFileField(FileField):
    """
    Same as FileField, but you can specify:
        * content_types - list containing allowed content_types. Example: ['application/pdf', 'image/jpeg']
        * max_upload_size - a number indicating the maximum file size allowed for upload.
            2.5MB - 2621440
            5MB - 5242880
            10MB - 10485760
            20MB - 20971520
            50MB - 5242880
            100MB - 104857600
            250MB - 214958080
            500MB - 429916160
    """
    def __init__(self, *args, **kwargs):
        self.content_types = kwargs.pop("content_types", [])
        self.max_upload_size = kwargs.pop("max_upload_size", 0)

        super(ContentTypeRestrictedFileField, self).__init__(*args, **kwargs)

    def clean(self, *args, **kwargs):
        data = super(ContentTypeRestrictedFileField, self).clean(*args, **kwargs)

        file = data.file
        try:
            content_type = file.content_type
            if content_type in self.content_types:
                if file._size > self.max_upload_size:
                    raise forms.ValidationError(_('Please keep filesize under %s. Current filesize %s') % (filesizeformat(self.max_upload_size), filesizeformat(file._size)))
            else:
                raise forms.ValidationError(_('Filetype not supported.'))
        except AttributeError:
            pass

        return data

Second. In your models.py, add this:

from formatChecker import ContentTypeRestrictedFileField

Then instead of using 'FileField', use this 'ContentTypeRestrictedFileField'.

Example:

class Stuff(models.Model):
    title = models.CharField(max_length=245)
    handout = ContentTypeRestrictedFileField(upload_to='uploads/', content_types=['video/x-msvideo', 'application/pdf', 'video/mp4', 'audio/mpeg', ],max_upload_size=5242880,blank=True, null=True)

You can change the value of 'max_upload_size' to the limit of file size that you want. You can also change the values inside the list of 'content_types' to the file types that you want to accept.

another solution is using validators

from django.core.exceptions import ValidationError

def file_size(value): # add this to some file where you can import it from
    limit = 2 * 1024 * 1024
    if value.size > limit:
        raise ValidationError('File too large. Size should not exceed 2 MiB.')

then in your form with the File field you have something like this

image = forms.FileField(required=False, validators=[file_size])