尝试使用PIL保存图像时出现IndexError [英] IndexError when trying to save an image with PIL

问题描述

我正在尝试将用户提交的PNG图像转换为JPEG，但是当我尝试保存图像时，我得到了

I am trying to convert the PNG images that the user submits to JPEG, but when I try to save the image, I get

<type 'exceptions.IndexError'>: string index out of range 

我正在使用CGI在Apache中运行python脚本.当我在控制台中运行脚本时，它可以正常运行.

I am running the python script in Apache using CGI. When I run the script in console, it works ok.

这是代码.

if imghdr.what(filePath) == 'png':
    p = Image.open(filePath)
    p.save('../files/outfile.jpg', "JPEG")
    filePath = "../files/outfile.jpg"

该错误发生在p.save()行上.我以为这是一个权限问题，但是我什至给了files/目录777权限，但仍然无法使用.

The error occurs on the p.save() row. I thought that it was a permission problem, but I even gave 777 permissions on the files/ directory and it still won't work.

编辑 这就是save()调用之后的结果.

EDIT This is what comes after the save() call.

 /usr/lib/python2.7/dist-packages/PIL/Image.py in save(self=<PIL.PngImagePlugin.PngImageFile image mode=RGB size=512x512>, fp='../files/outfile.jpg', format='JPEG', **params={})
   1434 
   1435         # may mutate self!
=> 1436         self.load()
   1437 
   1438         self.encoderinfo = params
self = <PIL.PngImagePlugin.PngImageFile image mode=RGB size=512x512>, self.load = <bound method PngImageFile.load of <PIL.PngImagePlugin.PngImageFile image mode=RGB size=512x512>>
 /usr/lib/python2.7/dist-packages/PIL/ImageFile.py in load(self=<PIL.PngImagePlugin.PngImageFile image mode=RGB size=512x512>)
    204                             break
    205                         else:
=>  206                             raise IndexError(ie)
    207 
    208                     if not s: # truncated jpeg
builtin IndexError = <type 'exceptions.IndexError'>, ie = IndexError('string index out of range',)

推荐答案

我将自己回答，因为Hugo没有发布答案.

I'm gonna answer this myself since Hugo didn't post an answer.

有一个名为 LOAD_TRUNCATED_IMAGES 的标志，默认情况下设置为 False .

There is a flag called LOAD_TRUNCATED_IMAGES that is set to False by default.

您必须转到/usr/lib/python2.7/dist-packages/PIL/ImageFile.py ，并将其设置为 True .

You have to go to /usr/lib/python2.7/dist-packages/PIL/ImageFile.py and set it to True.

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