我正在尝试在Sanic上执行文件上传,但它无法正常工作,烧瓶的正常语法似乎与sanic在这里运行良好。
我甚至无法访问文件名或save方法将上传的文件保存到给定目录。
答案 0 :(得分:8)
经过长时间的努力,我发现以下代码正在运作
@app.route("/upload", methods=['POST'])
async def omo(request):
from sanic import response
import os
if not os.path.exists(appConfig["upload"]):
os.makedirs(appConfig["upload"])
f = open(appConfig["upload"]+"/"+request.files["file"][0].name,"wb")
f.write(request.files["file"][0].body)
f.close()
return response.json(True)
答案 1 :(得分:2)
上面的答案很棒。一些小改进:
(1)由于我们正在使用Sanic,因此让我们尝试异步处理io文件。
async def write_file(path, body):
async with aiofiles.open(path, 'wb') as f:
await f.write(body)
f.close()
(2)确保文件不是太大,以至于导致服务器崩溃:
def valid_file_size(file_body):
if len(file_body) < 10485760:
return True
return False
(3)检查文件名和文件类型以获取正确的文件类型:
def valid_file_type(file_name, file_type):
file_name_type = file_name.split('.')[-1]
if file_name_type == "pdf" and file_type == "application/pdf":
return True
return False
(4)确保文件名没有危险/不安全的字符。您可以在werkzeug.utils中使用secure_filename函数:http://flask.pocoo.org/docs/0.12/patterns/fileuploads/
(5)此代码将所有内容组合在一起:
async def process_upload(request):
# Create upload folder if doesn't exist
if not os.path.exists(app.config.UPLOAD_DIR):
os.makedirs(app.config.UPLOAD_DIR)
# Ensure a file was sent
upload_file = request.files.get('file_names')
if not upload_file:
return redirect("/?error=no_file")
# Clean up the filename in case it creates security risks
filename = secure_filename(upload_file.name)
# Ensure the file is a valid type and size, and if so
# write the file to disk and redirect back to main
if not valid_file_type(upload_file.name, upload_file.type):
return redirect('/?error=invalid_file_type')
elif not valid_file_size(upload_file.body):
return redirect('/?error=invalid_file_size')
else:
file_path = f"{app.config.UPLOAD_DIR}/{str(datetime.now())}.pdf"
await write_file(file_path, upload_file.body)
return redirect('/?error=none')
我创建了一篇博客文章,介绍如何在Sanic中处理文件上传。我添加了一些文件验证以及异步文件写入功能。我希望其他人对此有所帮助:
https://blog.fcast.co/2019/06/16/file-upload-handling-using-asynchronous-file-writing/
答案 2 :(得分:0)
以下是针对特定文件类型的文件上传示例(此为pdf文件)
from sanic import Sanic
from sanic.response import json
from pathlib import os
from datetime import datetime
app = Sanic()
config = {}
config["upload"] = "./tests/uploads"
@app.route("/upload", methods=['POST'])
def post_json(request):
if not os.path.exists(config["upload"]):
os.makedirs(config["upload"])
test_file = request.files.get('file')
file_parameters = {
'body': test_file.body,
'name': test_file.name,
'type': test_file.type,
}
if file_parameters['name'].split('.')[-1] == 'pdf':
file_path = f"{config['upload']}/{str(datetime.now())}.pdf"
with open(file_path, 'wb') as f:
f.write(file_parameters['body'])
f.close()
print('file wrote to disk')
return json({ "received": True, "file_names": request.files.keys(), "success": True })
else:
return json({ "received": False, "file_names": request.files.keys(), "success": False, "status": "invalid file uploaded" })
有关其他请求类型的示例,请参阅官方文档(https://sanic.readthedocs.io/en/latest/sanic/request_data.html)