在我的Django项目中遇到了MemoryError的奇怪问题。
- Ubuntu 11
- Apache2
- Nginx
- mod_wsgi
- python2.7
我有一个使用PIL调整图像大小的模板标签，在我的开发机上运行得很好，但是在生产环境中，对于大图像（〜800px）会引起500错误。 模板标记似乎没有问题，但仅当原始图像已经非常小的情况下才有效。 模板标记是http://djangosnippets.org/snippets/1944/的修改版本
刚刚尝试了为python2.7重新编译mod_wsgi - 出现相同的错误。
是否有一种方法可以分配更多内存，或者可能还有其他我不理解的东西？
非常感谢任何帮助！
向我发送的跟踪邮件如下：
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