将图像上传到 Flask 服务器

Question

我在使用 Flask 并上传文件时遇到了一些困难，这是我目前的 Flask 代码：

    @app.route('/api/user/update/', methods=['PUT'])
@auth.login_required
def update_user():
        # check if the post request has the file part
    user = User.query.filter_by(id=g.user.id,deleted=0).first()
    try:
        if 'uname' in request.args:
            user.username = request.args['uname']
        if 'password' in request.args:
            user.hash_password(request.args['password'])
        if 'lname' in request.args:
            user.lastname = request.args['lname']
        if 'fname' in request.args:
            user.firstname = request.args['fname']
        if 'address' in request.args:
            user.address = request.args['address']
        if 'preferance1' in request.args:
            user.pre1 = request.args['preferance1']
        if 'preferance2' in request.args:
            user.pre2 = request.args['preferance2']
        if 'preferance3' in request.args:
            user.pre3 = request.args['preferance3']
        if 'file' in request.files:
            file = request.files['file']
            filename = secure_filename(file.filename)
            filename.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
            #print(filename)
            #print(url_for('upload_file', filename=filename))
            user.image_filename = filename
            user.image_url = url_for('upload_file', filename=filename)
        db.session.commit()
    except:
        print("Error")
        db.session.rollback()
        db.session.flush()
    return jsonify({'user':user.serialize})

如果我从 Postman 添加任何文件作为文件，请求将失败并抛出异常。我不知道为什么。

Answer 1

我认为你应该写file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename)) 而不是filename.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))。 file 是一个 File Storage 对象。而filename 只是一个字符串。