烧瓶/ Python。从上传的文件获取mimetype [英] Flask / Python. Get mimetype from uploaded file

问题描述

我使用Flask的micro-framework 0.6和Python 2.6

我需要从上传的文件中获取mimetype，以便存储它。 b
$ b

以下是相关的Python / Flask代码：

  @ app.route（'/ upload_file'，methods = ['GET'，'POST']）
 def upload_file（）：
 if request.method =='POST'：$ b $ file = request.files ['file '] 
 mimetype = #FIXME 
 if file：
 file.save（os.path.join（UPLOAD_FOLDER，'File-Name'）
 return redirect（url_for（'uploaded_file '））
 else：
 return redirect（url_for（'upload'））
  

<
这里是网页的代码：

 < form action =upload_file 
选择要上传的文件：< input type = file name = file> 
< input type = submit value = Upload> 
< ; / form> 
  

代码有效，但我需要能够在上传时获取mimetype。我在这里看过Flask文档： http：// flask。 pocoo.org/docs/api/#incoming-request-data

所以我知道它确实得到了mimetype，但是我不知道如何检索它 - 作为一个文本字符串，例如'txt / plain'。

有什么想法？

谢谢。

解决方案

从 docs ， file.content_type 包含完整的编码类型， mimetype contains只是MIME类型。

  @ app.route（'/ upload_file'，methods = ['GET'，'POST'] ）
 def upload_file（）：
 if request.method =='POST'：
 file = request.files.get（'file'）
 if file：
 mimetype = file.content_type 
 filename = werkzeug.secure_filename（file.filename）
 file.save（os.path.join（UPLOAD_FOLDER，filename）
 return redirect（url_for（'uploaded_file' ））
 else：
 return redirect（url_for（'upload'））
  

I am using Flask micro-framework 0.6 and Python 2.6

I need to get the mimetype from an uploaded file so I can store it.

Here is the relevent Python/Flask code:

@app.route('/upload_file', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        file = request.files['file']
        mimetype = #FIXME
        if file:
            file.save(os.path.join(UPLOAD_FOLDER, 'File-Name')
            return redirect(url_for('uploaded_file'))
        else:
            return redirect(url_for('upload'))

And here is the code for the webpage:

<form action="upload_file" method=post enctype=multipart/form-data> 
Select file to upload: <input type=file name=file> 
<input type=submit value=Upload> 
</form> 

The code works, but I need to be able to get the mimetype when it uploads. I've had a look at the Flask docs here: http://flask.pocoo.org/docs/api/#incoming-request-data
So I know it does get the mimetype, but I can't work out how to retrieve it - as a text string, e.g. 'txt/plain'.

Any ideas?

Thank you.

解决方案

From the docs, file.content_type contains the full type with encoding, mimetype contains just the mime type.

@app.route('/upload_file', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        file = request.files.get('file')
        if file:
            mimetype = file.content_type
            filename = werkzeug.secure_filename(file.filename)
            file.save(os.path.join(UPLOAD_FOLDER, filename)
            return redirect(url_for('uploaded_file'))
        else:
            return redirect(url_for('upload'))

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