openstack swift middleware开发

首先MiddleWare核心代码，这段代码卸载swift的源代码目录下，~/swift/swift/common/middleware下新建deletionpreventing.py：

import os
from swift.common.swob import Request, Response

class DeletionPreventingMiddleware(object):
    def __init__(self, app,conf):
        self.app = app
        print "vincent middleware"
        print app
    def __call__(self, env, start_response):
        print "it in deletionprevention middleware"
        if env['REQUEST_METHOD'] != 'DELETE':
            print "not put method"
            return self.app(env, start_response)
        return Response( status=403, body="Delete prohibited", content_type="text/plain")(env, start_response)
def filter_factory(global_conf, **local_conf):
    conf = global_conf.copy()
    conf.update(local_conf)
    print conf
    def deletionpreventing_filter(app):
        print "deletion"
        return DeletionPreventingMiddleware(app, conf)
    return deletionpreventing_filter

在/etc/swift/proxy-server.conf中添加中间件

[pipeline:main]
pipeline = catch_errors healthcheck cache ratelimit tempauth deletionpreventing proxy-logging proxy-server

[filter:deletionpreventing]
  use = egg:swift#deletionpreventing
  myconf=value1

其中deletionpriventing就是我们自己定义的中间件

然后在~/swift/swift.egg-info目录下的entry_point.txt中添加中间件：

deletionpreventing = swift.common.middleware.deletionpreventing:filter_factory

在~/swift/setup.cfg中添加中间件（这一步可以不做）

deletionpreventing = swift.common.middleware.deletionpreventing:filter_factory

测试运行：

swift@vincent-virtual-machine ~/swift $ curl -v -H "X-Storage-User:test:tester" -H "X-Storage-Pass:testing" http://127.0.0.1:8080/auth/v1.0
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port  (#)
> GET /auth/v1. HTTP/1.1
> User-Agent: curl/7.35.
> Host: 127.0.0.1:
> Accept: */*
> X-Storage-User:test:tester
> X-Storage-Pass:testing
>
< HTTP/1.1 200 OK
< X-Storage-Url: http://127.0.0.1:8080/v1/AUTH_test
< X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45
< Content-Type: text/html; charset=UTF-8
< X-Storage-Token: AUTH_tkf36387dd367b474383cfac60979bed45
< X-Trans-Id: tx0b4c7f7dee284e0d9dd5b-005630e592
< Content-Length: 0
< Date: Wed, 28 Oct 2015 15:11:14 GMT
<
* Connection #0 to host 127.0.0.1 left intact
swift@vincent-virtual-machine ~/swift $ 

查看列表：

swift@vincent-virtual-machine ~/swift $ curl -v  -H "X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45" http://127.0.0.1:8080/v1/AUTH_test/
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port  (#)
> GET /v1/AUTH_test/ HTTP/1.1
> User-Agent: curl/7.35.
> Host: 127.0.0.1:
> Accept: */*
> X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45
>
< HTTP/1.1 200 OK
< Content-Length: 20
< X-Account-Object-Count: 2
< X-Account-Storage-Policy-Policy-0-Bytes-Used: 12
< X-Account-Storage-Policy-Policy-0-Container-Count: 4
< X-Timestamp: 1444721178.82674
< X-Account-Storage-Policy-Policy-0-Object-Count: 2
< X-Account-Bytes-Used: 12
< X-Account-Container-Count: 4
< Content-Type: text/plain; charset=utf-8
< Accept-Ranges: bytes
< X-Trans-Id: tx1533138aaa0c4c6b99dfc-005630e60f
< Date: Wed, 28 Oct 2015 15:13:19 GMT
<
ab
ab2
hello
hello1
* Connection #0 to host 127.0.0.1 left intact
swift@vincent-virtual-machine ~/swift $ 

测试PUT请求：

swift@vincent-virtual-machine ~/swift $ curl -X PUT -v  -H "X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45" http://127.0.0.1:8080/v1/AUTH_test/ab3
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port  (#)
> PUT /v1/AUTH_test/ab3 HTTP/1.1
> User-Agent: curl/7.35.
> Host: 127.0.0.1:
> Accept: */*
> X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45
>
< HTTP/1.1 201 Created
< Content-Length: 0
< Content-Type: text/html; charset=UTF-8
< X-Trans-Id: tx6010eaabf2e64f4fa69dd-005630e642
< Date: Wed, 28 Oct 2015 15:14:10 GMT
<
* Connection #0 to host 127.0.0.1 left intact
swift@vincent-virtual-machine ~/swift $ curl -v  -H "X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45" http://127.0.0.1:8080/v1/AUTH_test/
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port 8080 (#0)
> GET /v1/AUTH_test/ HTTP/1.1
> User-Agent: curl/7.35.0
> Host: 127.0.0.1:8080
> Accept: */*
> X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45
>
< HTTP/1.1  OK
< Content-Length:
< X-Account-Object-Count:
< X-Account-Storage-Policy-Policy--Bytes-Used:
< X-Account-Storage-Policy-Policy--Container-Count:
< X-Timestamp: 1444721178.82674
< X-Account-Storage-Policy-Policy--Object-Count:
< X-Account-Bytes-Used:
< X-Account-Container-Count:
< Content-Type: text/plain; charset=utf-
< Accept-Ranges: bytes
< X-Trans-Id: tx6c0f7ff0121740a190b6f-005630e646
< Date: Wed,  Oct  :: GMT
<
ab
ab2
ab3
hello
hello1
* Connection # to host 127.0.0.1 left intact

PUT成功

测试DELETE请求：

swift@vincent-virtual-machine ~/swift $ curl -X DELETE -v  -H "X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45" http://127.0.0.1:8080/v1/AUTH_test/ab3
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to 127.0.0.1 (127.0.0.1) port  (#)
> DELETE /v1/AUTH_test/ab3 HTTP/1.1
> User-Agent: curl/7.35.
> Host: 127.0.0.1:
> Accept: */*
> X-Auth-Token: AUTH_tkf36387dd367b474383cfac60979bed45
>
< HTTP/1.1 403 Forbidden
< Content-Length: 17
< Content-Type: text/plain
< X-Trans-Id: tx5426c7feb84c41f29b837-005630e66f
< Date: Wed, 28 Oct 2015 15:14:55 GMT
<
* Connection #0 to host 127.0.0.1 left intact
Delete prohibitedswift@vincent-virtual-machine ~/swift $ 

DELETE请求失败，说明中间件起作用了