django - IOError:请求数据读取错误

Question

尝试将数据加载为 Excel 作为响应时，出现 IO 请求数据读取错误。

def convert_to_excel(request):
    field = forms.CharField()
    try: data = field.clean(request.POST.get('exceldata', ''))
    except: data = u''
    response = render_to_response("spreadsheet.html", request= request, dictionary = locals())
    filename = "%s%s.xls" % ("report_excel", datetime.datetime.today().strftime('%Y%m%d%H%M%S'))
    response['Content-Disposition'] = 'attachment; filename='+filename
    response['Content-Type'] = 'application/vnd.ms-excel; charset=utf-8'
    return response

当数据低于 150k 时它工作正常，但更大的文件在 200k 左右失败。我正在使用守护进程模式和 Python/2.7.3 运行 django 1.4 Apache/2.2.22 (Ubuntu) mod_wsgi/3.3。

这在本地主机中工作正常。我想这可能是守护进程模式下 wsgi 的问题或错误配置。有没有人知道这个？

我得到的异常(exception)如下。

Traceback (most recent call last):
 File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 89, in get_response
   response = middleware_method(request)

 File "/usr/local/lib/python2.7/dist-packages/newrelic-1.2.1.265-py2.7.egg/newrelic/hooks/framework_django.py", line 191, in __call__
   result = self.__wrapped(*args, **kwargs)

 File "/home/core/mysite/src/task/tools/libs/pagination/middleware.py", line 8, in process_request
   request.page = int(request.REQUEST.get('page', 1) )

 File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/wsgi.py", line 166, in _get_request
   self._request = datastructures.MergeDict(self.POST, self.GET)

 File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/wsgi.py", line 180, in _get_post
   self._load_post_and_files()

 File "/usr/local/lib/python2.7/dist-packages/django/http/__init__.py", line 360, in _load_post_and_files
   self._post, self._files = self.parse_file_upload(self.META, data)

 File "/usr/local/lib/python2.7/dist-packages/django/http/__init__.py", line 320, in parse_file_upload
   return parser.parse()

 File "/usr/local/lib/python2.7/dist-packages/newrelic-1.2.1.265-py2.7.egg/newrelic/api/function_trace.py", line 82, in __call__
   return self._nr_next_object(*args, **kwargs)

 File "/usr/local/lib/python2.7/dist-packages/django/http/multipartparser.py", line 161, in parse
   data = field_stream.read()

 File "/usr/local/lib/python2.7/dist-packages/django/http/multipartparser.py", line 301, in read
   out = ''.join(parts())

 File "/usr/local/lib/python2.7/dist-packages/django/http/multipartparser.py", line 285, in parts
   yield ''.join(self)

 File "/usr/local/lib/python2.7/dist-packages/django/http/multipartparser.py", line 316, in next
   output = self._producer.next()

 File "/usr/local/lib/python2.7/dist-packages/django/http/multipartparser.py", line 449, in next
   for bytes in stream:

 File "/usr/local/lib/python2.7/dist-packages/django/http/multipartparser.py", line 316, in next
   output = self._producer.next()

 File "/usr/local/lib/python2.7/dist-packages/django/http/multipartparser.py", line 377, in next
   data = self.flo.read(self.chunk_size)

 File "/usr/local/lib/python2.7/dist-packages/django/http/__init__.py", line 384, in read
   return self._stream.read(*args, **kwargs)

 File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/wsgi.py", line 104, in read
   result = self.buffer + self._read_limited(size - len(self.buffer))

 File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/wsgi.py", line 92, in _read_limited
   result = self.stream.read(size)

 File "/usr/local/lib/python2.7/dist-packages/newrelic-1.2.1.265-py2.7.egg/newrelic/api/web_transaction.py", line 349, in read
   data = self.__input.read(*args, **kwargs)

IOError: request data read error

Answer 1

检查你的 apache 配置，看看你是否能找到 LimitRequestBody
如果是，请将其更改为更大的数字，如果找不到，请在您的站点配置下添加以下内容

LimitRequestBody 1024000000 

另外，检查您的 uwsgi 文件限制选项，使用以下选项启动您的 uwsgi:

uwsgi --limit-post 1024000000 

这种错误是您的上传超过了您的 apache/nginx/uwsgi 最大上传设置。我还注意到你可能没有使用 uwsgi， limit request body和 set LimitRequestBody to be a low value by default 可能有帮助。