Django mod_wsgi MemoryError

Question

我的Django项目中有一个奇怪的MemoryError问题.

• Ubuntu 11
• 的Apache2
• Nginx的
• mod_wsgi的
• python2.7

我有一个模板标签,使用PIL调整图像大小,并在我的开发机器上运行良好,但在生产中它会导致500大错误的大图像(~800px).模板标签似乎没有问题,但只有原始图像已经非常小.模板标签是http://djangosnippets.org/snippets/1944/的修改版本

刚尝试重新编译mod_wsgi for python2.7 - 同样的错误.

有没有办法分配更多的内存,或者还有其他我不理解的东西？

任何帮助将非常感激!

通过电子邮件发送给我的Traceback是:

    Traceback (most recent call last):

     File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 111, in get_response
       response = callback(request, *callback_args, **callback_kwargs)

     File "/var/www/rizzyhome.com/www/django/rizzyhome/products/views.py", line 31, in designs
       context_instance=RequestContext(request)

     File "/usr/local/lib/python2.7/dist-packages/django/shortcuts/__init__.py", line 20, in render_to_response
       return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs)

     File "/usr/local/lib/python2.7/dist-packages/django/template/loader.py", line 188, in render_to_string
       return t.render(context_instance)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 123, in render
       return self._render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 117, in _render
       return self.nodelist.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render
       bits.append(self.render_node(node, context))

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node
       return node.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 127, in render
       return compiled_parent._render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 117, in _render
       return self.nodelist.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render
       bits.append(self.render_node(node, context))

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node
       return node.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 127, in render
       return compiled_parent._render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 117, in _render
       return self.nodelist.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render
       bits.append(self.render_node(node, context))

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node
       return node.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 64, in render
       result = block.nodelist.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render
       bits.append(self.render_node(node, context))

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node
       return node.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 64, in render
       result = block.nodelist.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render
       bits.append(self.render_node(node, context))

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node
       return node.render(context)

     File "/usr/local/lib/python2.7/dist-packages/django/template/defaulttags.py", line 227, in render
       nodelist.append(node.render(context))

     File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 885, in render
       return func(*func_args)

     File "/var/www/rizzyhome.com/www/django/rizzyhome/products/templatetags/yair.py", line 108, in thumbnail
       import Image, ImageOps

     File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 45, in <module>
       __import__("FixTk")

     File "/usr/lib/python2.7/lib-tk/FixTk.py", line 15, in <module>
       import ctypes

     File "/usr/lib/python2.7/ctypes/__init__.py", line 549, in <module>
       CFUNCTYPE(c_int)(lambda: None)

    MemoryError

编辑:添加代码

import os, errno

from django import template
from django.conf import settings

register = template.Library()

def _mkdir_p(path):
    try:
        os.makedirs(path)
    except OSError as exc: # Python >2.5
        if exc.errno == errno.EEXIST:
            pass
        else: raise

@register.simple_tag
def thumbnail(image_url, width, height, THIS_ROOT=settings.MEDIA_ROOT, THIS_URL=settings.MEDIA_URL, img_w=None, img_h=None, method="crop"):
    """
    Given the url to an image, resizes the image using the given width and 
    height on the first time it is requested, and returns the url to the new 
    resized image. If width or height are zero then the original ratio is 
    maintained.
    """

    if not img_w:
        img_w = width

    if not img_h:
        img_w = height

    image_url = unicode(image_url)

    # determine new paths
    resized_image_reduced = os.path.join('_resized_', image_url.replace(THIS_ROOT, ''))

    file_name, file_ext = os.path.basename(resized_image_reduced).split(os.extsep)
    resized_image_absolute_path = os.path.join(
        THIS_ROOT,
        os.path.dirname(resized_image_reduced),
        u'%s__%05d-%05d_%s%s%s' % (file_name, width, height, method, os.extsep, file_ext)
    )
    resized_image_relative_url = os.path.join(
        THIS_URL,
        os.path.dirname(resized_image_reduced),
        u'%s__%05d-%05d_%s%s%s' % (file_name, width, height, method, os.extsep, file_ext)
    )

    # make sure target directory exists
    _mkdir_p(os.path.realpath(os.path.dirname(resized_image_absolute_path)))

    # abort if thumbnail exists, original image doesn't exist, invalid width or 
    # height are given, or PIL not installed, or thumbnail is newer than source image
    if os.path.exists(resized_image_absolute_path):
        if os.path.exists(image_url):
            if os.path.getmtime(resized_image_absolute_path) > os.path.getmtime(image_url):
                return resized_image_relative_url
        else:
            return resized_image_relative_url
    if not image_url:
        return ""

    try:
        width = int(width)
        height = int(height)
    except ValueError:
        return resized_image_relative_url

    if not os.path.exists(image_url) or (width == 0 and height == 0):
        return image_url

    try:
        from PIL import Image, ImageOps
    except ImportError:
        return resized_image_relative_url

    # open image, determine ratio if required and resize/crop/save
    image = Image.open(image_url)
    if width == 0:
        width = image.size[0] * height / image.size[1]
    elif height == 0:
        height = image.size[1] * width / image.size[0]
    if image.mode not in ("L", "RGB"):
        image = image.convert("RGB")

    try:
        if method == 'scale':

            image.thumbnail((width, height), Image.ANTIALIAS)


            new_w, new_h = image.size

            x1 = (img_w-new_w) /2
            y1 = (img_h-new_h)

            new_image = Image.new(image.mode, (img_w, img_h), (255,255,255))
            new_image.paste(image, (x1,y1))

            new_image.save(
                resized_image_absolute_path,
                "JPEG",
                quality=100
            )

        elif method == 'crop':
            image = ImageOps.fit(image, (width, height), Image.ANTIALIAS)
            image.save(
                resized_image_absolute_path,
                "JPEG",
                quality=100
            )

    except Exception, e:
        raise
        return resized_image_relative_url

    return resized_image_relative_url

Answer 1

非常感谢您的评论和提供帮助。

显然__init__.pyCTYPE 模块中有一个奇怪的错误。- 或者别的什么，我刚读过:)

至少对我来说，修复是注释掉__init__.py文件中的最后一行。似乎最后一行是专门针对 Windows 64 位的，并且弄乱了我的 Ubuntu。

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=598727#38