upload.py 文件源码

def validate(self):
        if not Form.validate(self):
            return False
        if self.uploadfile.name not in request.files:
            self.uploadfile.errors.append("Please select a valid file.")
            return False

        self.file_ = request.files[self.uploadfile.name]
        self.filename = secure_filename(self.file_.filename)
        uploads = os.listdir(os.path.join(app.root_path, app.config['UPLOAD_FOLDER']))

        if self.filename in uploads:
            self.uploadfile.errors.append("A file with this name already exists.")
            return False
        if not self.filename:
            self.uploadfile.errors.append("Invalid file name.")
            return False
        return True