我正在尝试创建一个文件上传服务与龙卷风。在
但我注意到,当多个用户上传文件时,tornado会等待第一个用户完成并处理下一个。在
在Tornado上进行异步文件上载的正确方法是什么?在
我的职位:
@tornado.web.asynchronous
def post(self):
list_of_img = ['png','jpg','jpeg','gif']
list_of_files = ['rtf','txt','ppt','pptx','doc','docx','pdf','xls','xlsx','rar','zip','tgz','bz','gz','tar','bz2','3gp','mp4','m15','avi','mp3']
path = __UPLOADS__
try:
fileinfo = self.request.files['file'][0]
filebody = fileinfo['body']
filename = fileinfo['filename']
filetype = fileinfo['content_type']
extn = os.path.splitext(filename)[1]
n_filename = str(uuid.uuid4()) + extn
# rcv file
print "saving", n_filename + "..."
output_file = open(n_filename, 'w')
output_file.write(filebody)
# upload to s3
print "uploading", n_filename + "..."
self.upload(path, n_filename)
# clean up
print "cleaning", n_filename + "..."
self.delete_local(n_filename)
self.finish(n_filename)
except KeyError, key:
delete = self.get_argument("delete", None, True)
if delete:
filename = self.get_argument("filename", None, True)
print "deleting", filename + "..."
self.delete(path, filename)
self.finish(filename)
Gevent(Greenlets)是解决阻塞部分的免费午餐方式。在
^{1}$但要小心,有时会弄坏东西。在
应该使用
@asynchronous
修饰符来标记已经异步的方法;它不会使方法异步。这个post
方法是同步的,因为它在将控制权返回IOLoop之前完成它要做的所有事情。您需要使upload()
方法异步(这通常意味着它要么接受回调参数,要么返回一个Future
),然后在不阻止post()
的情况下调用它(我建议使用@gen.coroutine
修饰符,并通过生成它们返回的Futures
调用慢速操作)。在相关问题 更多 >
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