如何使用 Flask 在文件夹中上传或存储图像？

Question

我目前拥有二进制格式的图像以及图像的扩展名。我想使用烧瓶将图像存储在文件夹中。我该怎么做？

图像的格式。

image = {
    'img_src': binary_format_of_image,
    'ext': image_extension,
    'id': image_id
}

Answer 1

Flask 通过您的 Flask 应用程序介绍了 uploading files

来自该页面的方法：

def allowed_file(filename):
    return '.' in filename and \
           filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

@app.route('/upload-my-image', methods=['POST'])
def upload_file():
   # check if the post request has the file part
   if 'file' not in request.files:
       flash('No file part')
       return redirect(request.url)
   file = request.files['file']
   # if user does not select file, browser also
   # submit an empty part without filename
   if file.filename == '':
       flash('No selected file')
       return redirect(request.url)
   if file and allowed_file(file.filename):
       filename = secure_filename(file.filename)
       file.save(os.path.join(ABSOLUTE_PATH_TO_YOUR_FOLDER, filename))
       new_image = Image(
           path=PATH_TO_YOUR_FOLDER,
           filename=filename,
           ext=filename.rsplit('.', 1)[1].lower()
       )
       # Save new_image model
       return redirect(url_for('uploaded_file', filename=filename))

Flask request.files 使用的数据结构是FileStorage。

还要注意<form> 标记必须用enctype=multipart/form-data 和<input type=file> 标记