Openstack Swift学习(四)：中间件

2018-09-29

假设要添加一个名为 demomiddleware 的中间件

在 swift/swift/common/middleware 下新建 demomiddleware.py，内容如下：

from swift.common.swob import Request, Response
class DemoMiddleware(object):
    def __init__(self,app,conf):
        self.app = app
        print('init demo middleware')
    def __call__(self, env, start_response):
        print('request method:'+env['REQUEST_METHOD'])
        print('do nothing in demo middleware')
        return self.app(env, start_response)

def demomiddleware_factory(global_conf, **local_conf):
    conf = global_conf.copy()
    conf.update(local_conf)
    def demomiddleware_filter(app):
        return DemoMiddleware(app, conf)
    return demomiddleware_filter

在 /etc/swift/proxy-server.conf 中添加中间件，在 [pipeline:main] 部分添加 demomiddleware，并添加 [filter:demomiddleware] 部分。如下所示：

[pipeline:main]
pipeline = healthcheck cache tempauth proxy-logging demomiddleware proxy-server

[filter:demomiddleware]
paste.filter_factory = swift.common.middleware.demomiddleware:demomiddleware_factory

重启 proxy server

Reference

https://docs.openstack.org/swift/latest/development_middleware.html

https://wiki.openstack.org/wiki/Customizing_Object_Storage_(Swift)_Middleware

https://hk.saowen.com/a/3417d85c757690432df0125dbdf2bc28a0be4631a9927499ca637956558e14e9

https://my.oschina.net/duanvincent/blog/757748

http://www.cinlk.com/2015/07/26/swiftmiddlware/