Weitere ähnliche Inhalte Ähnlich wie 一种多屏时代的通用 web 应用架构 (20) Kürzlich hochgeladen (20) 2. 自我介绍
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game → webgame → web
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珠三角技术沙龙组委、发起人之一
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PyCon China 2011/2012 讲师
– Python 于 webgame 的应用
– 页游开发中的 Python 组件与模式
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http://laiyonghao.com/
8. Web 架构的变迁（ 2 ）
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def request_wants_json():
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best = request.accept_mimetypes
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.best_match(['application/json', 'text/html'])
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return best == 'application/json' and
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request.accept_mimetypes[best] >
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request.accept_mimetypes['text/html']
9. Web 架构的变迁（ 2 ）
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@app.route('/')
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def show_items():
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items = get_items_from_database()
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if request_wants_json():
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return jsonify(items=[x.to_json() for x in items])
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return render_template('show_items.html',
items=items)
11. 插播： mimerender
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mimerender = mimerender.FlaskMimeRender()
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render_xml = lambda message: '<message>
%s</message>'%message
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render_json = lambda **args: json.dumps(args)
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render_html = lambda message: '<html><body>
%s</body></html>'%message
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render_txt = lambda message: message
14. Web 架构的变迁（ 2 ）
browser
server
text/html
wap browser
app
text/vnd.wap.wml
application/json
16. Web 架构的变迁（ 3 ）
browser
adapter
text/html
wap browser
app
text/vnd.wap.wml
application/json
adapter
adapter
server
adapterSMS
application/json
17. Web 架构的变迁（ 3 ）
browser
adapter
text/html
wap browser
app
text/vnd.wap.wml
application/json
adapter
adapter
server
adapterSMS
application/json
？
18. Web 架构的变迁（ 3 ）
●
业务与展现分享
– server 专注业务实现，只需要提供 http api ，无须理
会数据展现形式；
– adapter 的业务简单，只需要维护会话，并对请求 / 响
应进行转换；
●
易于分工
– 内部可以分小组
– 甚至外包（解决了我团队不熟悉短信中心协议的问题）
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易于扩展
– 支持更多设备（如自助终端、语音电话）
19. Web 架构的变迁（ 3 ）
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安全：对数据进行签名
– client-id 、 client-key
– sha1
– 让 Date header 必填来确保每次请救不同
21. Flask-RESTful: Argument Parsing
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parser = reqparse.RequestParser()
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parser.add_argument('rate', type=int, help='Rate to
charge for this resource')
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args = parser.parse_args()
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支持必填项、多值项、重命名
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可从 post body 、 query
string 、 headers 、 cookies 、 file uploads 中读取
22. Flask-RESTful: Output Fields
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resource_fields = {
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'name': fields.String,
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'address': fields.String,
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'date_updated': fields.DateTime,
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}
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class Todo(Resource):
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@marshal_with(resource_fields)
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def get(self, **kwargs):
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return db_get_todo() # Some function that queries
the db
26. chtest
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$ chtest --help
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usage: chtest [-h] [--config-file CONFIG_FILE] --path
PATH [--method METHOD]
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[--arg ARG] [--header HEADER] [--ensure-status
ENSURE_STATUS]
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[--ensure-header ENSURE_HEADER]
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[--ensure-content ENSURE_CONTENT] [--print-
header PRINT_HEADER]
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[--print-json-path PRINT_JSON_PATH]
27. requests
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chtest is requests powered
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Requests: HTTP for Humans
– >>> r = requests.get('https://api.github.com/user',
auth=('user', 'pass'))
– >>> r.status_code
– 200
– >>> r.headers['content-type']
– 'application/json; charset=utf8'
– >>> r.text
– u'{"type":"User"...'
– >>> r.json()
29. Web 架构的变迁（ 3 ）
browser
adapter
text/html
wap browser
app
text/vnd.wap.wml
application/json
adapter
adapter
server
adapterSMS
RPC ??
31. lettuce.it
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Feature: Manipulate strings
●
In order to have some fun
●
As a programming beginner
●
I want to manipulate strings
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Scenario: Uppercased strings
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Given I have the string "lettuce leaves"
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When I put it in upper case
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Then I see the string is "LETTUCE LEAVES"
32. lettuce.it
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>>> @step('I have the string "(.*)"')
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... def have_the_string(step, string):
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... world.string = string
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>>> @step('I put it in upper case')
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... def put_it_in_upper(step):
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... world.string = world.string.upper()
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>>> @step('I see the string is "(.*)"')
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... def see_the_string_is(step, expected):
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... assert world.string == expected,
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... "Got %s" % world.string
33. lettuce.it
●
from lettuce import step
●
from nose.tools import assert_equals
●
@step('some step with "(.*)"'):
●
def some_step(step, from):
●
assert_equals(from, 'expectation')
