Pillow返回错误：“IOError：图像文件被截断（6个字节未处理）”

Question

我使用Python 2.7 / Django 1.9和Pillow 4.1.1。

我的网站上有成千上万张用户上传的图片，我使用Pillow从模板生成缩略图。

例如：

{% thumbnail apicture.file "1200x350" crop="center" as im %}
    <img src="{{ im.url }}" width=100%>
{% endthumbnail %}

直到本周前，它一直运行得非常好。Django现在显示以下错误：

IOError: image file is truncated (6 bytes not processed)

在stackoverflow上找到的解决方案都不起作用，因为它们都适用于视图而不是模板（例如ImageFile.LOAD_TRUNCATED_IMAGES = True）。

有没有一种简单的方法来识别哪些图片会生成此错误？如何解决这个问题？

以下是完整的回溯信息：

Internal Server Error: /trip/province-dublin-2034
Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\django\core\handlers\base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Python27\lib\site-packages\django\core\handlers\base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)    
  File "C:\Terradiem\terradiem\trip\views.py", line 300, in trip
    return render(request, 'trip/results.html', qsall)
  File "C:\Python27\lib\site-packages\django\shortcuts.py", line 67, in render template_name, context, request=request, using=using)
  File "C:\Python27\lib\site-packages\django\template\loader.py", line 97, in render_to_string
    return template.render(context, request)
  File "C:\Python27\lib\site-packages\django\template\backends\django.py", line 95, in render
    return self.template.render(context)
  File "C:\Python27\lib\site-packages\django\template\base.py", line 206, in render
    return self._render(context)
  File "C:\Python27\lib\site-packages\django\test\utils.py", line 92, in instrumented_test_render
    return self.nodelist.render(context)
  File "C:\Python27\lib\site-packages\django\template\base.py", line 992, in render
    bit = node.render_annotated(context)
  File "C:\Python27\lib\site-packages\django\template\base.py", line 959, in render_annotated
    return self.render(context)
  File "C:\Python27\lib\site-packages\django\template\defaulttags.py", line 220, in render
    nodelist.append(node.render_annotated(context))
  File "C:\Python27\lib\site-packages\django\template\base.py", line 959, in render_annotated
    return self.render(context)
  File "C:\Python27\lib\site-packages\django\template\defaulttags.py", line 220, in render
    nodelist.append(node.render_annotated(context))
  File "C:\Python27\lib\site-packages\django\template\base.py", line 959, in render_annotated
    return self.render(context)
  File "C:\Python27\lib\site-packages\django\template\defaulttags.py", line 326, in render
    return nodelist.render(context)
  File "C:\Python27\lib\site-packages\django\template\base.py", line 992, in render
    bit = node.render_annotated(context)
  File "C:\Python27\lib\site-packages\django\template\base.py", line 959, in render_annotated
    return self.render(context)
  File "C:\Python27\lib\site-packages\sorl\thumbnail\templatetags\thumbnail.py", line 59, in render
    return self._render(context)
  File "C:\Python27\lib\site-packages\sorl\thumbnail\templatetags\thumbnail.py", line 137, in _render
    thumbnail = get_thumbnail(file_, geometry, **options)
  File "C:\Python27\lib\site-packages\sorl\thumbnail\shortcuts.py", line 8, in get_thumbnail
    return default.backend.get_thumbnail(file_, geometry_string, **options)
  File "C:\Python27\lib\site-packages\sorl\thumbnail\base.py", line 125, in get_thumbnail
    thumbnail)
  File "C:\Python27\lib\site-packages\sorl\thumbnail\base.py", line 157, in _create_thumbnail
    image = default.engine.create(source_image, geometry, options)
  File "C:\Python27\lib\site-packages\sorl\thumbnail\engines\base.py", line 21, in create
    image = self.colorspace(image, geometry, options)
  File "C:\Python27\lib\site-packages\sorl\thumbnail\engines\base.py", line 53, in colorspace
    return self._colorspace(image, colorspace)
  File "C:\Python27\lib\site-packages\sorl\thumbnail\engines\pil_engine.py", line 101, in _colorspace
    return image.convert('RGB')
  File "C:\Python27\lib\site-packages\PIL\Image.py", line 844, in convert
self.load()
  File "C:\Python27\lib\site-packages\PIL\ImageFile.py", line 226, in load
"(%d bytes not processed)" % len(b))
IOError: image file is truncated (6 bytes not processed)

谢谢您

- Paul Noon

---

很可能，所涉及的图像标题包含有关内容长度错误的信息（可能已损坏）。您可以通过明确捕获和处理该错误来解决此问题，可能同时从标题中测试内容长度信息。 - jbndlr

只需在您的Django应用程序中尽早找到并执行 ImageFile.LOAD_TRUNCATED_IMAGES = True即可。 - lepsch

Answer 1

好的，我已经得到了自己问题的答案！

正如lepsch所评论的那样，只需添加

from PIL import Image, ImageFile ImageFile.LOAD_TRUNCATED_IMAGES = True

尽早在Django应用程序中添加。我将其添加到生成页面的视图中，它能够很好地工作。

- Paul Noon