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

问题描述

我使用 Flask 微框架 0.6 和 Python 2.6

I am using Flask micro-framework 0.6 and Python 2.6

我需要从上传的文件中获取 mimetype 以便我可以存储它.

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

这是相关的 Python/Flask 代码:

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'))

这是网页的代码:

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> 

该代码有效，但我需要能够在上传时获取 mimetype.我在这里查看了 Flask 文档:http://flask.pocoo.org/docs/api/#incoming-request-data
所以我知道它确实得到了 mimetype，但我不知道如何检索它 - 作为文本字符串，例如'txt/普通'.

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'.

有什么想法吗?

谢谢.

推荐答案

来自 docs，file.content_type 包含带编码的完整类型，mimetype 只包含 mime 类型.

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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