django中的文件读取错误 [英] File reading Error in django

问题描述

以下是读取文件的行&在django中下载:

  def下载(请求):file_name = request.GET.get('file_name'，'')path_to_file ="C:\ Users \ CV_Uploads \ uploadfiles \ uploadfiles" +"\\" + file_namefileanme = open('r'.path_to_file，"rb")#**这里错误**mimetype = mimetypes.guess_type('path_to_file')[0]如果不是mimetype:mimetype ="application/octet-stream"响应= HttpResponse(fileanme.read()，mimetype = mimetype)response ["Content-Disposition"] =附件；文件名=％s"％os.path.split(path_to_file)[1]返回响应 

问题:可以很好地处理硬编码的值，但是现在我通过将 path_to_file与file_name 结合起来使此代码动态化.它说:/download/中的 AttributeError....'str'对象没有属性'path_to_file'

如何解决此属性错误?

解决方案

好吧，该代码显然是错误的.如错误所言，您正在使用字符串"r" ，并使用点号在其上调用 path_to_file 属性，该属性不存在.

我不确定 r 应该做什么.没有它，它应该可以正常工作:

  fileanme = open(path_to_file，"rb") 

Here are the lines to read file & download in django :

def download(request):
    file_name =request.GET.get('file_name', '')
    path_to_file = "C:\Users\CV_Uploads\uploadfiles\uploadfiles" + "\\" + file_name

    fileanme = open('r'. path_to_file , "rb")  # **ERROR HERE**
    mimetype = mimetypes.guess_type('path_to_file')[0]
    if not mimetype: mimetype = "application/octet-stream"

    response = HttpResponse(fileanme.read(), mimetype=mimetype)
    response["Content-Disposition"]= "attachment; filename=%s" % os.path.split(path_to_file)[1]
    return response

Problem: Was working fine with hardcoded values but now as i make this code dynamic by joining path_to_file with file_name . It says: AttributeError at /download/ . . . .'str' object has no attribute 'path_to_file'

How to solve this attribute error?

解决方案

Well, that code is clearly wrong. As the error says, you're taking the string "r", and using the dot notation to call a path_to_file attribute on it, which doesn't exist.

I'm not sure what that r is supposed to be doing at all. It should work fine without it:

fileanme = open(path_to_file , "rb")

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