第一个web框架tornado
简介
tornado，是我学到的第一个web框架是 FriendFeed 使用的可扩展的非阻塞式 web 服务器及其相关工具的开源版本。这个 Web 框架看起来有些像web.py 或者 Google 的 webapp，不过为了能有效利用非阻塞式服务器环境，这个 Web 框架还包含了一些相关的有用工具 和优化。
Tornado 和现在的主流 Web 服务器框架（包括大多数 Python 的框架）有着明显的区别：它是非阻塞式服务器，而且速度相当快。得利于其 非阻塞的方式和对 epoll 的运用，Tornado 每秒可以处理数以千计的连接，这意味着对于实时 Web 服务来说，Tornado 是一个理想的 Web 框架。我们开发这个 Web 服务器的主要目的就是为了处理 FriendFeed 的实时功能 ——在 FriendFeed 的应用里每一个活动用户都会保持着一个服务器连接。（关于如何扩容 服务器，以处理数以千计的客户端的连接的问题，请参阅 C10K problem。）
下载与安装
pip3 install tornado
源码安装
https://pypi.python.org/packages/source/t/tornado/tornado-4.3.tar.gz
但是好多的时候并不尽如人意，比如环境，比如系统，比如我们不知道的一些原因或者东西莫名其妙报些错误，这时候你需要
一、最基本tornado使用
#!/usr/bin/env python # -*- coding:utf-8 -*- import tornado.ioloop import tornado.web class MainHandler(tornado.web.RequestHandler): def get(self): self.write("Hello, world") application = tornado.web.Application([ (r"/index", MainHandler), ]) if __name__ == "__main__": application.listen(8888) tornado.ioloop.IOLoop.instance().start()
上述代码执行过程：
第一步：执行脚本，监听 8888 端口 第二步：浏览器客户端访问 /index --> http://127.0.0.1:8888/index 第三步：服务器接受请求，并交由对应的类处理该请求 第四步：类接受到请求之后，根据请求方式（post / get / delete ...）的不同调用并执行相应的方法 第五步：方法返回值的字符串内容发送浏览器
异步非阻塞实例
#!/usr/bin/env python # -*- coding:utf-8 -*- #!/usr/bin/env python # -*- coding:utf-8 -*- import tornado.ioloop import tornado.web from tornado import httpclient from tornado.web import asynchronous from tornado import gen import uimodules as md import uimethods as mt class MainHandler(tornado.web.RequestHandler): @asynchronous @gen.coroutine def get(self): print 'start get ' http = httpclient.AsyncHTTPClient() http.fetch("http://127.0.0.1:8008/post/", self.callback) self.write('end') def callback(self, response): print response.body settings = { 'template_path': 'template', 'static_path': 'static', 'static_url_prefix': '/static/', 'ui_methods': mt, 'ui_modules': md, } application = tornado.web.Application([ (r"/index", MainHandler), ], **settings) if __name__ == "__main__": application.listen(8009) tornado.ioloop.IOLoop.instance().start()
二、tornado的路由系统
路由系统其实就是 url 和 类 的对应关系，这里不同于其他框架，其他很多框架均是 url 对应 函数，Tornado中每个url对应的是一个类
tornado支持原生路由
三、模板的引擎
Tornao中的模板语言和django中类似，模板引擎将模板文件载入内存，然后将数据嵌入其中，最终获取到一个完整的字符串，再将字符串返回给请求者。
Tornado 的模板支持“控制语句”和“表达语句”，控制语句是使用 {% 和 %} 包起来的 例如 {% if len(items) > 2 %}。表达语句是使用 {{ 和 }} 包起来的，例如 {{ items[0] }}。
控制语句和对应的 Python 语句的格式基本完全相同。我们支持 if、for、while 和 try，这些语句逻辑结束的位置需要用 {% end %} 做标记。还通过 extends 和 block 语句实现了模板继承。这些在 template 模块 的代码文档中有着详细的描述。
注：在使用模板前需要在setting中设置模板路径："template_path" : "tpl"，
1、基本的使用
1 复制代码 2 #!/usr/bin/env python 3 # -*- coding:utf-8 -*- 4 5 import tornado.ioloop 6 import tornado.web 7 8 9 class MainHandler(tornado.web.RequestHandler): 10 def get(self): 11 self.render("index.html", list_info = [11,22,33]) 12 13 application = tornado.web.Application([ 14 (r"/index", MainHandler), 15 ]) 16 17 18 if __name__ == "__main__": 19 application.listen(8888) 20 tornado.ioloop.IOLoop.instance().start()
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 5 <title>老男孩</title> 6 <link href="{{static_url("css/common.css")}}" rel="stylesheet" /> 7 </head> 8 <body> 9 10 <div> 11 <ul> 12 {% for item in list_info %} 13 <li>{{item}}</li> 14 {% end %} 15 </ul> 16 </div> 17 18 <script src="{{static_url("js/jquery-1.8.2.min.js")}}"></script> 19 20 </body> 21 </html>
1 在模板中默认提供了一些函数、字段、类以供模板使用： 2 3 escape: tornado.escape.xhtml_escape 的別名 4 xhtml_escape: tornado.escape.xhtml_escape 的別名 5 url_escape: tornado.escape.url_escape 的別名 6 json_encode: tornado.escape.json_encode 的別名 7 squeeze: tornado.escape.squeeze 的別名 8 linkify: tornado.escape.linkify 的別名 9 datetime: Python 的 datetime 模组 10 handler: 当前的 RequestHandler 对象 11 request: handler.request 的別名 12 current_user: handler.current_user 的別名 13 locale: handler.locale 的別名 14 _: handler.locale.translate 的別名 15 static_url: for handler.static_url 的別名 16 xsrf_form_html: handler.xsrf_form_html 的別名
2、母版
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 5 <title>老男孩</title> 6 <link href="{{static_url("css/common.css")}}" rel="stylesheet" /> 7 {% block CSS %}{% end %} 8 </head> 9 <body> 10 11 <div class="pg-header"> 12 13 </div> 14 15 {% block RenderBody %}{% end %} 16 17 <script src="{{static_url("js/jquery-1.8.2.min.js")}}"></script> 18 19 {% block JavaScript %}{% end %} 20 </body> 21 </html>
1 {% extends 'layout.html'%} 2 {% block CSS %} 3 <link href="{{static_url("css/index.css")}}" rel="stylesheet" /> 4 {% end %} 5 6 {% block RenderBody %} 7 <h1>Index</h1> 8 9 <ul> 10 {% for item in li %} 11 <li>{{item}}</li> 12 {% end %} 13 </ul> 14 15 {% end %} 16 17 {% block JavaScript %} 18 19 {% end %}
3、导入
1 <div> 2 <ul> 3 <li>1024</li> 4 <li>42区</li> 5 </ul> 6 </div>
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 5 <title>老男孩</title> 6 <link href="{{static_url("css/common.css")}}" rel="stylesheet" /> 7 </head> 8 <body> 9 10 <div class="pg-header"> 11 {% include 'header.html' %} 12 </div> 13 14 <script src="{{static_url("js/jquery-1.8.2.min.js")}}"></script> 15 16 </body> 17 </html>
4、自定义UIMethod以UIModule
定义
1 # uimethods.py 2 3 def tab(self): 4 return 'UIMethod'
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 from tornado.web import UIModule 4 from tornado import escape 5 6 class custom(UIModule): 7 8 def render(self, *args, **kwargs): 9 return escape.xhtml_escape('<h1>wupeiqi</h1>') 10 #return escape.xhtml_escape('<h1>wupeiqi</h1>')
注册
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 #!/usr/bin/env python 4 # -*- coding:utf-8 -*- 5 6 import tornado.ioloop 7 import tornado.web 8 from tornado.escape import linkify 9 import uimodules as md 10 import uimethods as mt 11 12 class MainHandler(tornado.web.RequestHandler): 13 def get(self): 14 self.render('index.html') 15 16 settings = { 17 'template_path': 'template', 18 'static_path': 'static', 19 'static_url_prefix': '/static/', 20 'ui_methods': mt, 21 'ui_modules': md, 22 } 23 24 application = tornado.web.Application([ 25 (r"/index", MainHandler), 26 ], **settings) 27 28 29 if __name__ == "__main__": 30 application.listen(8009) 31 tornado.ioloop.IOLoop.instance().start()
使用
1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title></title> 6 <link href="{{static_url("commons.css")}}" rel="stylesheet" /> 7 </head> 8 <body> 9 <h1>hello</h1> 10 {% module custom(123) %} 11 {{ tab() }} 12 </body>
四、静态文件
对于静态文件，可以配置静态文件的目录和前段使用时的前缀，并且Tornaodo还支持静态文件缓存。
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 import tornado.ioloop 5 import tornado.web 6 7 8 class MainHandler(tornado.web.RequestHandler): 9 def get(self): 10 self.render('home/index.html') 11 12 settings = { 13 'template_path': 'template', 14 'static_path': 'static', 15 'static_url_prefix': '/static/', 16 } 17 18 application = tornado.web.Application([ 19 (r"/index", MainHandler), 20 ], **settings) 21 22 23 if __name__ == "__main__": 24 application.listen(80) 25 tornado.ioloop.IOLoop.instance().start()
1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title></title> 6 <link href="{{static_url("commons.css")}}" rel="stylesheet" /> 7 </head> 8 <body> 9 <h1>hello</h1> 10 </body> 11 </html>
静态文件缓存的实现
1 def get_content_version(cls, abspath): 2 """Returns a version string for the resource at the given path. 3 4 This class method may be overridden by subclasses. The 5 default implementation is a hash of the file's contents. 6 7 .. versionadded:: 3.1 8 """ 9 data = cls.get_content(abspath) 10 hasher = hashlib.md5() 11 if isinstance(data, bytes): 12 hasher.update(data) 13 else: 14 for chunk in data: 15 hasher.update(chunk) 16 return hasher.hexdigest()
五、cookie
Tornado中可以对cookie进行操作，并且还可以对cookie进行签名以放置伪造。
1、基本操作
1 class MainHandler(tornado.web.RequestHandler): 2 def get(self): 3 if not self.get_cookie("mycookie"): 4 self.set_cookie("mycookie", "myvalue") 5 self.write("Your cookie was not set yet!") 6 else: 7 self.write("Your cookie was set!")
2、加密cookie（签名）
Cookie 很容易被恶意的客户端伪造。加入你想在 cookie 中保存当前登陆用户的 id 之类的信息，你需要对 cookie 作签名以防止伪造。Tornado 通过 set_secure_cookie 和 get_secure_cookie 方法直接支持了这种功能。 要使用这些方法，你需要在创建应用时提供一个密钥，名字为 cookie_secret。 你可以把它作为一个关键词参数传入应用的设置中：
1 class MainHandler(tornado.web.RequestHandler): 2 def get(self): 3 if not self.get_secure_cookie("mycookie"): 4 self.set_secure_cookie("mycookie", "myvalue") 5 self.write("Your cookie was not set yet!") 6 else: 7 self.write("Your cookie was set!") 8 9 application = tornado.web.Application([ 10 (r"/", MainHandler), 11 ], cookie_secret="61oETzKXQAGaYdkL5gEmGeJJFuYh7EQnp2XdTP1o/Vo=")
内部算法
1 def _create_signature_v1(secret, *parts): 2 hash = hmac.new(utf8(secret), digestmod=hashlib.sha1) 3 for part in parts: 4 hash.update(utf8(part)) 5 return utf8(hash.hexdigest()) 6 7 # 加密 8 def _create_signature_v2(secret, s): 9 hash = hmac.new(utf8(secret), digestmod=hashlib.sha256) 10 hash.update(utf8(s)) 11 return utf8(hash.hexdigest()) 12 13 def create_signed_value(secret, name, value, version=None, clock=None, 14 key_version=None): 15 if version is None: 16 version = DEFAULT_SIGNED_VALUE_VERSION 17 if clock is None: 18 clock = time.time 19 20 timestamp = utf8(str(int(clock()))) 21 value = base64.b64encode(utf8(value)) 22 if version == 1: 23 signature = _create_signature_v1(secret, name, value, timestamp) 24 value = b"|".join([value, timestamp, signature]) 25 return value 26 elif version == 2: 27 # The v2 format consists of a version number and a series of 28 # length-prefixed fields "%d:%s", the last of which is a 29 # signature, all separated by pipes. All numbers are in 30 # decimal format with no leading zeros. The signature is an 31 # HMAC-SHA256 of the whole string up to that point, including 32 # the final pipe. 33 # 34 # The fields are: 35 # - format version (i.e. 2; no length prefix) 36 # - key version (integer, default is 0) 37 # - timestamp (integer seconds since epoch) 38 # - name (not encoded; assumed to be ~alphanumeric) 39 # - value (base64-encoded) 40 # - signature (hex-encoded; no length prefix) 41 def format_field(s): 42 return utf8("%d:" % len(s)) + utf8(s) 43 to_sign = b"|".join([ 44 b"2", 45 format_field(str(key_version or 0)), 46 format_field(timestamp), 47 format_field(name), 48 format_field(value), 49 b'']) 50 51 if isinstance(secret, dict): 52 assert key_version is not None, 'Key version must be set when sign key dict is used' 53 assert version >= 2, 'Version must be at least 2 for key version support' 54 secret = secret[key_version] 55 56 signature = _create_signature_v2(secret, to_sign) 57 return to_sign + signature 58 else: 59 raise ValueError("Unsupported version %d" % version) 60 61 # 解密 62 def _decode_signed_value_v1(secret, name, value, max_age_days, clock): 63 parts = utf8(value).split(b"|") 64 if len(parts) != 3: 65 return None 66 signature = _create_signature_v1(secret, name, parts[0], parts[1]) 67 if not _time_independent_equals(parts[2], signature): 68 gen_log.warning("Invalid cookie signature %r", value) 69 return None 70 timestamp = int(parts[1]) 71 if timestamp < clock() - max_age_days * 86400: 72 gen_log.warning("Expired cookie %r", value) 73 return None 74 if timestamp > clock() + 31 * 86400: 75 # _cookie_signature does not hash a delimiter between the 76 # parts of the cookie, so an attacker could transfer trailing 77 # digits from the payload to the timestamp without altering the 78 # signature. For backwards compatibility, sanity-check timestamp 79 # here instead of modifying _cookie_signature. 80 gen_log.warning("Cookie timestamp in future; possible tampering %r", 81 value) 82 return None 83 if parts[1].startswith(b"0"): 84 gen_log.warning("Tampered cookie %r", value) 85 return None 86 try: 87 return base64.b64decode(parts[0]) 88 except Exception: 89 return None 90 91 92 def _decode_fields_v2(value): 93 def _consume_field(s): 94 length, _, rest = s.partition(b':') 95 n = int(length) 96 field_value = rest[:n] 97 # In python 3, indexing bytes returns small integers; we must 98 # use a slice to get a byte string as in python 2. 99 if rest[n:n + 1] != b'|': 100 raise ValueError("malformed v2 signed value field") 101 rest = rest[n + 1:] 102 return field_value, rest 103 104 rest = value[2:] # remove version number 105 key_version, rest = _consume_field(rest) 106 timestamp, rest = _consume_field(rest) 107 name_field, rest = _consume_field(rest) 108 value_field, passed_sig = _consume_field(rest) 109 return int(key_version), timestamp, name_field, value_field, passed_sig 110 111 112 def _decode_signed_value_v2(secret, name, value, max_age_days, clock): 113 try: 114 key_version, timestamp, name_field, value_field, passed_sig = _decode_fields_v2(value) 115 except ValueError: 116 return None 117 signed_string = value[:-len(passed_sig)] 118 119 if isinstance(secret, dict): 120 try: 121 secret = secret[key_version] 122 except KeyError: 123 return None 124 125 expected_sig = _create_signature_v2(secret, signed_string) 126 if not _time_independent_equals(passed_sig, expected_sig): 127 return None 128 if name_field != utf8(name): 129 return None 130 timestamp = int(timestamp) 131 if timestamp < clock() - max_age_days * 86400: 132 # The signature has expired. 133 return None 134 try: 135 return base64.b64decode(value_field) 136 except Exception: 137 return None 138 139 140 def get_signature_key_version(value): 141 value = utf8(value) 142 version = _get_version(value) 143 if version < 2: 144 return None 145 try: 146 key_version, _, _, _, _ = _decode_fields_v2(value) 147 except ValueError: 148 return None 149 150 return key_version
签名Cookie的本质是：
写cookie过程： 将值进行base64加密 对除值以外的内容进行签名，哈希算法（无法逆向解析） 拼接 签名 + 加密值 读cookie过程： 读取 签名 + 加密值 对签名进行验证 base64解密，获取值内容 注：许多API验证机制和安全cookie的实现机制相同。
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 import tornado.ioloop 5 import tornado.web 6 7 8 class MainHandler(tornado.web.RequestHandler): 9 10 def get(self): 11 login_user = self.get_secure_cookie("login_user", None) 12 if login_user: 13 self.write(login_user) 14 else: 15 self.redirect('/login') 16 17 18 class LoginHandler(tornado.web.RequestHandler): 19 def get(self): 20 self.current_user() 21 22 self.render('login.html', **{'status': ''}) 23 24 def post(self, *args, **kwargs): 25 26 username = self.get_argument('name') 27 password = self.get_argument('pwd') 28 if username == 'wupeiqi' and password == '123': 29 self.set_secure_cookie('login_user', '武沛齐') 30 self.redirect('/') 31 else: 32 self.render('login.html', **{'status': '用户名或密码错误'}) 33 34 settings = { 35 'template_path': 'template', 36 'static_path': 'static', 37 'static_url_prefix': '/static/', 38 'cookie_secret': 'aiuasdhflashjdfoiuashdfiuh' 39 } 40 41 application = tornado.web.Application([ 42 (r"/index", MainHandler), 43 (r"/login", LoginHandler), 44 ], **settings) 45 46 47 if __name__ == "__main__": 48 application.listen(8888) 49 tornado.ioloop.IOLoop.instance().start()
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 import tornado.ioloop 5 import tornado.web 6 7 class BaseHandler(tornado.web.RequestHandler): 8 9 def get_current_user(self): 10 return self.get_secure_cookie("login_user") 11 12 class MainHandler(BaseHandler): 13 14 @tornado.web.authenticated 15 def get(self): 16 login_user = self.current_user 17 self.write(login_user) 18 19 20 21 class LoginHandler(tornado.web.RequestHandler): 22 def get(self): 23 self.current_user() 24 25 self.render('login.html', **{'status': ''}) 26 27 def post(self, *args, **kwargs): 28 29 username = self.get_argument('name') 30 password = self.get_argument('pwd') 31 if username == 'wupeiqi' and password == '123': 32 self.set_secure_cookie('login_user', '呵呵') 33 self.redirect('/') 34 else: 35 self.render('login.html', **{'status': '用户名或密码错误'}) 36 37 settings = { 38 'template_path': 'template', 39 'static_path': 'static', 40 'static_url_prefix': '/static/', 41 'cookie_secret': 'aiuasdhflashjdfoiuashdfiuh', 42 'login_url': '/login' 43 } 44 45 application = tornado.web.Application([ 46 (r"/index", MainHandler), 47 (r"/login", LoginHandler), 48 ], **settings) 49 50 51 if __name__ == "__main__": 52 application.listen(8888) 53 tornado.ioloop.IOLoop.instance().start()
3、JavaScript操作Cookie
由于Cookie保存在浏览器端，所以在浏览器端也可以使用JavaScript来操作Cookie。
/* 设置cookie，指定秒数过期 */ function setCookie(name,value,expires){ var temp = []; var current_date = new Date(); current_date.setSeconds(current_date.getSeconds() + 5); document.cookie = name + "= "+ value +";expires=" + current_date.toUTCString(); }
对于参数：
- domain 指定域名下的cookie
- path 域名下指定url中的cookie
- secure https使用
注：jQuery中也有指定的插件 jQuery Cookie 专门用于操作cookie，猛击这里
六、csrf
Tornado中的夸张请求伪造和Django中的相似，跨站伪造请求(Cross-site request forgery)
1 settings = { 2 "xsrf_cookies": True, 3 } 4 application = tornado.web.Application([ 5 (r"/", MainHandler), 6 (r"/login", LoginHandler), 7 ], **settings)
1 <form action="/new_message" method="post"> 2 {{ xsrf_form_html() }} 3 <input type="text" name="message"/> 4 <input type="submit" value="Post"/> 5 </form>
1 function getCookie(name) { 2 var r = document.cookie.match("\\b" + name + "=([^;]*)\\b"); 3 return r ? r[1] : undefined; 4 } 5 6 jQuery.postJSON = function(url, args, callback) { 7 args._xsrf = getCookie("_xsrf"); 8 $.ajax({url: url, data: $.param(args), dataType: "text", type: "POST", 9 success: function(response) { 10 callback(eval("(" + response + ")")); 11 }}); 12 };
注：Ajax使用时，本质上就是去获取本地的cookie，携带cookie再来发送请求
七、上传文件
1、Form表单上传
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 5 <title>上传文件</title> 6 </head> 7 <body> 8 <form id="my_form" name="form" action="/index" method="POST" enctype="multipart/form-data" > 9 <input name="fff" id="my_file" type="file" /> 10 <input type="submit" value="提交" /> 11 </form> 12 </body> 13 </html>
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 import tornado.ioloop 5 import tornado.web 6 7 8 class MainHandler(tornado.web.RequestHandler): 9 def get(self): 10 11 self.render('index.html') 12 13 def post(self, *args, **kwargs): 14 file_metas = self.request.files["fff"] 15 # print(file_metas) 16 for meta in file_metas: 17 file_name = meta['filename'] 18 with open(file_name,'wb') as up: 19 up.write(meta['body']) 20 21 settings = { 22 'template_path': 'template', 23 } 24 25 application = tornado.web.Application([ 26 (r"/index", MainHandler), 27 ], **settings) 28 29 30 if __name__ == "__main__": 31 application.listen(8000) 32 tornado.ioloop.IOLoop.instance().start()
ajax上传
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 import tornado.ioloop 5 import tornado.web 6 7 8 class MainHandler(tornado.web.RequestHandler): 9 def get(self): 10 11 self.render('index.html') 12 13 def post(self, *args, **kwargs): 14 file_metas = self.request.files["fff"] 15 # print(file_metas) 16 for meta in file_metas: 17 file_name = meta['filename'] 18 with open(file_name,'wb') as up: 19 up.write(meta['body']) 20 21 settings = { 22 'template_path': 'template', 23 } 24 25 application = tornado.web.Application([ 26 (r"/index", MainHandler), 27 ], **settings) 28 29 30 if __name__ == "__main__": 31 application.listen(8000) 32 tornado.ioloop.IOLoop.instance().start()
1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title></title> 6 </head> 7 <body> 8 <input type="file" id="img" /> 9 <input type="button" onclick="UploadFile();" /> 10 <script> 11 function UploadFile(){ 12 var fileObj = $("#img")[0].files[0]; 13 var form = new FormData(); 14 form.append("k1", "v1"); 15 form.append("fff", fileObj); 16 17 $.ajax({ 18 type:'POST', 19 url: '/index', 20 data: form, 21 processData: false, // tell jQuery not to process the data 22 contentType: false, // tell jQuery not to set contentType 23 success: function(arg){ 24 console.log(arg); 25 } 26 }) 27 } 28 </script> 29 </body> 30 </html>
1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title></title> 6 </head> 7 <body> 8 <form id="my_form" name="form" action="/index" method="POST" enctype="multipart/form-data" > 9 <div id="main"> 10 <input name="fff" id="my_file" type="file" /> 11 <input type="button" name="action" value="Upload" onclick="redirect()"/> 12 <iframe id='my_iframe' name='my_iframe' src="" class="hide"></iframe> 13 </div> 14 </form> 15 16 <script> 17 function redirect(){ 18 document.getElementById('my_iframe').onload = Testt; 19 document.getElementById('my_form').target = 'my_iframe'; 20 document.getElementById('my_form').submit(); 21 22 } 23 24 function Testt(ths){ 25 var t = $("#my_iframe").contents().find("body").text(); 26 console.log(t); 27 } 28 </script> 29 </body> 30 </html>
1 import tornado.ioloop 2 import tornado.web 3 4 5 class MainHandler(tornado.web.RequestHandler): 6 def get(self): 7 8 self.render('index.html') 9 10 def post(self, *args, **kwargs): 11 file_metas = self.request.files["fff"] 12 # print(file_metas) 13 for meta in file_metas: 14 file_name = meta['filename'] 15 with open(file_name,'wb') as up: 16 up.write(meta['body']) 17 18 settings = { 19 'template_path': 'template', 20 } 21 22 application = tornado.web.Application([ 23 (r"/index", MainHandler), 24 ], **settings) 25 26 27 if __name__ == "__main__": 28 application.listen(8000) 29 tornado.ioloop.IOLoop.instance().start()
1 <script type="text/javascript"> 2 3 $(document).ready(function () { 4 5 $("#formsubmit").click(function () { 6 7 var iframe = $('<iframe name="postiframe" id="postiframe" style="display: none"></iframe>'); 8 9 $("body").append(iframe); 10 11 var form = $('#theuploadform'); 12 form.attr("action", "/upload.aspx"); 13 form.attr("method", "post"); 14 15 form.attr("encoding", "multipart/form-data"); 16 form.attr("enctype", "multipart/form-data"); 17 18 form.attr("target", "postiframe"); 19 form.attr("file", $('#userfile').val()); 20 form.submit(); 21 22 $("#postiframe").load(function () { 23 iframeContents = this.contentWindow.document.body.innerHTML; 24 $("#textarea").html(iframeContents); 25 }); 26 27 return false; 28 29 }); 30 31 }); 32 33 </script> 34 35 36 <form id="theuploadform"> 37 <input id="userfile" name="userfile" size="50" type="file" /> 38 <input id="formsubmit" type="submit" value="Send File" /> 39 </form> 40 41 <div id="textarea"> 42 </div>
八、验证码
验证码原理在于后台自动创建一张带有随机内容的图片，然后将内容通过img标签输出到页面。
安装图像处理模块
pip3 install pillow
验证码Demo源码下载：猛击这里
九、异步非阻塞
1、基本使用
装饰器 + Future 从而实现Tornado的异步非阻塞
class AsyncHandler(tornado.web.RequestHandler): @gen.coroutine def get(self): future = Future() future.add_done_callback(self.doing) yield future # 或 # tornado.ioloop.IOLoop.current().add_future(future,self.doing) # yield future def doing(self,*args, **kwargs): self.write('async') self.finish()
当发送GET请求时，由于方法被@gen.coroutine装饰且yield 一个 Future对象，那么Tornado会等待，等待用户向future对象中放置数据或者发送信号，如果获取到数据或信号之后，就开始执行doing方法。
异步非阻塞体现在当在Tornaod等待用户向future对象中放置数据时，还可以处理其他请求。
注意：在等待用户向future对象中放置数据或信号时，此连接是不断开的。
2、同步阻塞和异步非阻塞对比
1 class SyncHandler(tornado.web.RequestHandler): 2 3 def get(self): 4 self.doing() 5 self.write('sync') 6 7 def doing(self): 8 time.sleep(10)
1 class AsyncHandler(tornado.web.RequestHandler): 2 @gen.coroutine 3 def get(self): 4 future = Future() 5 tornado.ioloop.IOLoop.current().add_timeout(time.time() + 5, self.doing) 6 yield future 7 8 9 def doing(self, *args, **kwargs): 10 self.write('async') 11 self.finish()
3、httpclient类库
Tornado提供了httpclient类库用于发送Http请求，其配合Tornado的异步非阻塞使用。
1 class AsyncHandler(tornado.web.RequestHandler): 2 @gen.coroutine 3 def get(self): 4 from tornado import httpclient 5 6 http = httpclient.AsyncHTTPClient() 7 yield http.fetch("http://www.google.com", self.endding) 8 9 10 def endding(self, response): 11 print(len(response.body)) 12 self.write('ok') 13 self.finish()
十、session
1、面向对象基础
面向对象中通过索引的方式访问对象，需要内部实现 __getitem__ 、__delitem__、__setitem__方法
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 class Foo(object): 5 6 def __getitem__(self, key): 7 print '__getitem__',key 8 9 def __setitem__(self, key, value): 10 print '__setitem__',key,value 11 12 def __delitem__(self, key): 13 print '__delitem__',key 14 15 16 17 obj = Foo() 18 result = obj['k1'] 19 #obj['k2'] = 'wupeiqi' 20 #del obj['k1']
2、Tornado扩展
Tornado框架中，默认执行Handler的get/post等方法之前默认会执行 initialize方法，所以可以通过自定义的方式使得所有请求在处理前执行操作...
1 class BaseHandler(tornado.web.RequestHandler): 2 3 def initialize(self): 4 self.xxoo = "wupeiqi" 5 6 7 class MainHandler(BaseHandler): 8 9 def get(self): 10 print(self.xxoo) 11 self.write('index') 12 13 class IndexHandler(BaseHandler): 14 15 def get(self): 16 print(self.xxoo) 17 self.write('index')
3、session
session其实就是定义在服务器端用于保存用户回话的容器，其必须依赖cookie才能实现
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 import config 4 from hashlib import sha1 5 import os 6 import time 7 8 create_session_id = lambda: sha1(bytes('%s%s' % (os.urandom(16), time.time()), encoding='utf-8')).hexdigest() 9 10 11 class SessionFactory: 12 13 @staticmethod 14 def get_session_obj(handler): 15 obj = None 16 17 if config.SESSION_TYPE == "cache": 18 obj = CacheSession(handler) 19 elif config.SESSION_TYPE == "memcached": 20 obj = MemcachedSession(handler) 21 elif config.SESSION_TYPE == "redis": 22 obj = RedisSession(handler) 23 return obj 24 25 26 class CacheSession: 27 session_container = {} 28 session_id = "__sessionId__" 29 30 def __init__(self, handler): 31 self.handler = handler 32 client_random_str = handler.get_cookie(CacheSession.session_id, None) 33 if client_random_str and client_random_str in CacheSession.session_container: 34 self.random_str = client_random_str 35 else: 36 self.random_str = create_session_id() 37 CacheSession.session_container[self.random_str] = {} 38 39 expires_time = time.time() + config.SESSION_EXPIRES 40 handler.set_cookie(CacheSession.session_id, self.random_str, expires=expires_time) 41 42 def __getitem__(self, key): 43 ret = CacheSession.session_container[self.random_str].get(key, None) 44 return ret 45 46 def __setitem__(self, key, value): 47 CacheSession.session_container[self.random_str][key] = value 48 49 def __delitem__(self, key): 50 if key in CacheSession.session_container[self.random_str]: 51 del CacheSession.session_container[self.random_str][key] 52 53 54 class RedisSession: 55 def __init__(self, handler): 56 pass 57 58 59 class MemcachedSession: 60 def __init__(self, handler): 61 pass
4、分布式Session
1 #!/usr/bin/env python 2 #coding:utf-8 3 4 import sys 5 import math 6 from bisect import bisect 7 8 9 if sys.version_info >= (2, 5): 10 import hashlib 11 md5_constructor = hashlib.md5 12 else: 13 import md5 14 md5_constructor = md5.new 15 16 17 class HashRing(object): 18 """一致性哈希""" 19 20 def __init__(self,nodes): 21 '''初始化 22 nodes : 初始化的节点，其中包含节点已经节点对应的权重 23 默认每一个节点有32个虚拟节点 24 对于权重，通过多创建虚拟节点来实现 25 如：nodes = [ 26 {'host':'127.0.0.1:8000','weight':1}, 27 {'host':'127.0.0.1:8001','weight':2}, 28 {'host':'127.0.0.1:8002','weight':1}, 29 ] 30 ''' 31 32 self.ring = dict() 33 self._sorted_keys = [] 34 35 self.total_weight = 0 36 37 self.__generate_circle(nodes) 38 39 40 41 def __generate_circle(self,nodes): 42 for node_info in nodes: 43 self.total_weight += node_info.get('weight',1) 44 45 for node_info in nodes: 46 weight = node_info.get('weight',1) 47 node = node_info.get('host',None) 48 49 virtual_node_count = math.floor((32*len(nodes)*weight) / self.total_weight) 50 for i in xrange(0,int(virtual_node_count)): 51 key = self.gen_key_thirty_two( '%s-%s' % (node, i) ) 52 if self._sorted_keys.__contains__(key): 53 raise Exception('该节点已经存在.') 54 self.ring[key] = node 55 self._sorted_keys.append(key) 56 57 def add_node(self,node): 58 ''' 新建节点 59 node : 要添加的节点，格式为：{'host':'127.0.0.1:8002','weight':1}，其中第一个元素表示节点，第二个元素表示该节点的权重。 60 ''' 61 node = node.get('host',None) 62 if not node: 63 raise Exception('节点的地址不能为空.') 64 65 weight = node.get('weight',1) 66 67 self.total_weight += weight 68 nodes_count = len(self._sorted_keys) + 1 69 70 virtual_node_count = math.floor((32 * nodes_count * weight) / self.total_weight) 71 for i in xrange(0,int(virtual_node_count)): 72 key = self.gen_key_thirty_two( '%s-%s' % (node, i) ) 73 if self._sorted_keys.__contains__(key): 74 raise Exception('该节点已经存在.') 75 self.ring[key] = node 76 self._sorted_keys.append(key) 77 78 def remove_node(self,node): 79 ''' 移除节点 80 node : 要移除的节点 '127.0.0.1:8000' 81 ''' 82 for key,value in self.ring.items(): 83 if value == node: 84 del self.ring[key] 85 self._sorted_keys.remove(key) 86 87 def get_node(self,string_key): 88 '''获取 string_key 所在的节点''' 89 pos = self.get_node_pos(string_key) 90 if pos is None: 91 return None 92 return self.ring[ self._sorted_keys[pos]].split(':') 93 94 def get_node_pos(self,string_key): 95 '''获取 string_key 所在的节点的索引''' 96 if not self.ring: 97 return None 98 99 key = self.gen_key_thirty_two(string_key) 100 nodes = self._sorted_keys 101 pos = bisect(nodes, key) 102 return pos 103 104 def gen_key_thirty_two(self, key): 105 106 m = md5_constructor() 107 m.update(key) 108 return long(m.hexdigest(), 16) 109 110 def gen_key_sixteen(self,key): 111 112 b_key = self.__hash_digest(key) 113 return self.__hash_val(b_key, lambda x: x) 114 115 def __hash_val(self, b_key, entry_fn): 116 return (( b_key[entry_fn(3)] << 24)|(b_key[entry_fn(2)] << 16)|(b_key[entry_fn(1)] << 8)| b_key[entry_fn(0)] ) 117 118 def __hash_digest(self, key): 119 m = md5_constructor() 120 m.update(key) 121 return map(ord, m.digest()) 122 123 124 """ 125 nodes = [ 126 {'host':'127.0.0.1:8000','weight':1}, 127 {'host':'127.0.0.1:8001','weight':2}, 128 {'host':'127.0.0.1:8002','weight':1}, 129 ] 130 131 ring = HashRing(nodes) 132 result = ring.get_node('98708798709870987098709879087') 133 print result 134 135 """
1 from hashlib import sha1 2 import os, time 3 4 5 create_session_id = lambda: sha1('%s%s' % (os.urandom(16), time.time())).hexdigest() 6 7 8 class Session(object): 9 10 session_id = "__sessionId__" 11 12 def __init__(self, request): 13 session_value = request.get_cookie(Session.session_id) 14 if not session_value: 15 self._id = create_session_id() 16 else: 17 self._id = session_value 18 request.set_cookie(Session.session_id, self._id) 19 20 def __getitem__(self, key): 21 # 根据 self._id ，在一致性哈西中找到其对应的服务器IP 22 # 找到相对应的redis服务器，如： r = redis.StrictRedis(host='localhost', port=6379, db=0) 23 # 使用python redis api 链接 24 # 获取数据，即： 25 # return self._redis.hget(self._id, name) 26 27 def __setitem__(self, key, value): 28 # 根据 self._id ，在一致性哈西中找到其对应的服务器IP 29 # 使用python redis api 链接 30 # 设置session 31 # self._redis.hset(self._id, name, value) 32 33 34 def __delitem__(self, key): 35 # 根据 self._id 找到相对应的redis服务器 36 # 使用python redis api 链接 37 # 删除，即： 38 return self._redis.hdel(self._id, name)
十一、表单的验证
在Web程序中往往包含大量的表单验证的工作，如：判断输入是否为空，是否符合规则
1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title></title> 6 <link href="{{static_url("commons.css")}}" rel="stylesheet" /> 7 </head> 8 <body> 9 <h1>hello</h1> 10 <form action="/index" method="post"> 11 12 <p>hostname: <input type="text" name="host" /> </p> 13 <p>ip: <input type="text" name="ip" /> </p> 14 <p>port: <input type="text" name="port" /> </p> 15 <p>phone: <input type="text" name="phone" /> </p> 16 <input type="submit" /> 17 </form> 18 </body> 19 </html>
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 import tornado.ioloop 5 import tornado.web 6 from hashlib import sha1 7 import os, time 8 import re 9 10 11 class MainForm(object): 12 def __init__(self): 13 self.host = "(.*)" 14 self.ip = "^(25[0-5]|2[0-4]\d|[0-1]?\d?\d)(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}$" 15 self.port = '(\d+)' 16 self.phone = '^1[3|4|5|8][0-9]\d{8}$' 17 18 def check_valid(self, request): 19 form_dict = self.__dict__ 20 for key, regular in form_dict.items(): 21 post_value = request.get_argument(key) 22 # 让提交的数据 和 定义的正则表达式进行匹配 23 ret = re.match(regular, post_value) 24 print key,ret,post_value 25 26 27 class MainHandler(tornado.web.RequestHandler): 28 def get(self): 29 self.render('index.html') 30 def post(self, *args, **kwargs): 31 obj = MainForm() 32 result = obj.check_valid(self) 33 self.write('ok') 34 35 36 37 settings = { 38 'template_path': 'template', 39 'static_path': 'static', 40 'static_url_prefix': '/static/', 41 'cookie_secret': 'aiuasdhflashjdfoiuashdfiuh', 42 'login_url': '/login' 43 } 44 45 application = tornado.web.Application([ 46 (r"/index", MainHandler), 47 ], **settings) 48 49 50 if __name__ == "__main__": 51 application.listen(8888) 52 tornado.ioloop.IOLoop.instance().start()
由于验证规则可以代码重用，所以可以如此定义：
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 import tornado.ioloop 5 import tornado.web 6 import re 7 8 9 class Field(object): 10 11 def __init__(self, error_msg_dict, required): 12 self.id_valid = False 13 self.value = None 14 self.error = None 15 self.name = None 16 self.error_msg = error_msg_dict 17 self.required = required 18 19 def match(self, name, value): 20 self.name = name 21 22 if not self.required: 23 self.id_valid = True 24 self.value = value 25 else: 26 if not value: 27 if self.error_msg.get('required', None): 28 self.error = self.error_msg['required'] 29 else: 30 self.error = "%s is required" % name 31 else: 32 ret = re.match(self.REGULAR, value) 33 if ret: 34 self.id_valid = True 35 self.value = ret.group() 36 else: 37 if self.error_msg.get('valid', None): 38 self.error = self.error_msg['valid'] 39 else: 40 self.error = "%s is invalid" % name 41 42 43 class IPField(Field): 44 REGULAR = "^(25[0-5]|2[0-4]\d|[0-1]?\d?\d)(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}$" 45 46 def __init__(self, error_msg_dict=None, required=True): 47 48 error_msg = {} # {'required': 'IP不能为空', 'valid': 'IP格式错误'} 49 if error_msg_dict: 50 error_msg.update(error_msg_dict) 51 52 super(IPField, self).__init__(error_msg_dict=error_msg, required=required) 53 54 55 class IntegerField(Field): 56 REGULAR = "^\d+$" 57 58 def __init__(self, error_msg_dict=None, required=True): 59 error_msg = {'required': '数字不能为空', 'valid': '数字格式错误'} 60 if error_msg_dict: 61 error_msg.update(error_msg_dict) 62 63 super(IntegerField, self).__init__(error_msg_dict=error_msg, required=required) 64 65 66 class CheckBoxField(Field): 67 68 def __init__(self, error_msg_dict=None, required=True): 69 error_msg = {} # {'required': 'IP不能为空', 'valid': 'IP格式错误'} 70 if error_msg_dict: 71 error_msg.update(error_msg_dict) 72 73 super(CheckBoxField, self).__init__(error_msg_dict=error_msg, required=required) 74 75 def match(self, name, value): 76 self.name = name 77 78 if not self.required: 79 self.id_valid = True 80 self.value = value 81 else: 82 if not value: 83 if self.error_msg.get('required', None): 84 self.error = self.error_msg['required'] 85 else: 86 self.error = "%s is required" % name 87 else: 88 if isinstance(name, list): 89 self.id_valid = True 90 self.value = value 91 else: 92 if self.error_msg.get('valid', None): 93 self.error = self.error_msg['valid'] 94 else: 95 self.error = "%s is invalid" % name 96 97 98 class FileField(Field): 99 REGULAR = "^(\w+\.pdf)|(\w+\.mp3)|(\w+\.py)$" 100 101 def __init__(self, error_msg_dict=None, required=True): 102 error_msg = {} # {'required': '数字不能为空', 'valid': '数字格式错误'} 103 if error_msg_dict: 104 error_msg.update(error_msg_dict) 105 106 super(FileField, self).__init__(error_msg_dict=error_msg, required=required) 107 108 def match(self, name, value): 109 self.name = name 110 self.value = [] 111 if not self.required: 112 self.id_valid = True 113 self.value = value 114 else: 115 if not value: 116 if self.error_msg.get('required', None): 117 self.error = self.error_msg['required'] 118 else: 119 self.error = "%s is required" % name 120 else: 121 m = re.compile(self.REGULAR) 122 if isinstance(value, list): 123 for file_name in value: 124 r = m.match(file_name) 125 if r: 126 self.value.append(r.group()) 127 self.id_valid = True 128 else: 129 self.id_valid = False 130 if self.error_msg.get('valid', None): 131 self.error = self.error_msg['valid'] 132 else: 133 self.error = "%s is invalid" % name 134 break 135 else: 136 if self.error_msg.get('valid', None): 137 self.error = self.error_msg['valid'] 138 else: 139 self.error = "%s is invalid" % name 140 141 def save(self, request, upload_path=""): 142 143 file_metas = request.files[self.name] 144 for meta in file_metas: 145 file_name = meta['filename'] 146 with open(file_name,'wb') as up: 147 up.write(meta['body']) 148 149 150 class Form(object): 151 152 def __init__(self): 153 self.value_dict = {} 154 self.error_dict = {} 155 self.valid_status = True 156 157 def validate(self, request, depth=10, pre_key=""): 158 159 self.initialize() 160 self.__valid(self, request, depth, pre_key) 161 162 def initialize(self): 163 pass 164 165 def __valid(self, form_obj, request, depth, pre_key): 166 """ 167 验证用户表单请求的数据 168 :param form_obj: Form对象（Form派生类的对象） 169 :param request: Http请求上下文（用于从请求中获取用户提交的值） 170 :param depth: 对Form内容的深度的支持 171 :param pre_key: Html中name属性值的前缀（多层Form时，内部递归时设置，无需理会） 172 :return: 是否验证通过，True：验证成功；False：验证失败 173 """ 174 175 depth -= 1 176 if depth < 0: 177 return None 178 form_field_dict = form_obj.__dict__ 179 for key, field_obj in form_field_dict.items(): 180 print key,field_obj 181 if isinstance(field_obj, Form) or isinstance(field_obj, Field): 182 if isinstance(field_obj, Form): 183 # 获取以key开头的所有的值，以参数的形式传至 184 self.__valid(field_obj, request, depth, key) 185 continue 186 if pre_key: 187 key = "%s.%s" % (pre_key, key) 188 189 if isinstance(field_obj, CheckBoxField): 190 post_value = request.get_arguments(key, None) 191 elif isinstance(field_obj, FileField): 192 post_value = [] 193 file_list = request.request.files.get(key, None) 194 for file_item in file_list: 195 post_value.append(file_item['filename']) 196 else: 197 post_value = request.get_argument(key, None) 198 199 print post_value 200 # 让提交的数据 和 定义的正则表达式进行匹配 201 field_obj.match(key, post_value) 202 if field_obj.id_valid: 203 self.value_dict[key] = field_obj.value 204 else: 205 self.error_dict[key] = field_obj.error 206 self.valid_status = False 207 208 209 class ListForm(object): 210 def __init__(self, form_type): 211 self.form_type = form_type 212 self.valid_status = True 213 self.value_dict = {} 214 self.error_dict = {} 215 216 def validate(self, request): 217 name_list = request.request.arguments.keys() + request.request.files.keys() 218 index = 0 219 flag = False 220 while True: 221 pre_key = "[%d]" % index 222 for name in name_list: 223 if name.startswith(pre_key): 224 flag = True 225 break 226 if flag: 227 form_obj = self.form_type() 228 form_obj.validate(request, depth=10, pre_key="[%d]" % index) 229 if form_obj.valid_status: 230 self.value_dict[index] = form_obj.value_dict 231 else: 232 self.error_dict[index] = form_obj.error_dict 233 self.valid_status = False 234 else: 235 break 236 237 index += 1 238 flag = False 239 240 241 class MainForm(Form): 242 243 def __init__(self): 244 # self.ip = IPField(required=True) 245 # self.port = IntegerField(required=True) 246 # self.new_ip = IPField(required=True) 247 # self.second = SecondForm() 248 self.fff = FileField(required=True) 249 super(MainForm, self).__init__() 250 251 # 252 # class SecondForm(Form): 253 # 254 # def __init__(self): 255 # self.ip = IPField(required=True) 256 # self.new_ip = IPField(required=True) 257 # 258 # super(SecondForm, self).__init__() 259 260 261 class MainHandler(tornado.web.RequestHandler): 262 def get(self): 263 self.render('index.html') 264 def post(self, *args, **kwargs): 265 # for i in dir(self.request): 266 # print i 267 # print self.request.arguments 268 # print self.request.files 269 # print self.request.query 270 # name_list = self.request.arguments.keys() + self.request.files.keys() 271 # print name_list 272 273 # list_form = ListForm(MainForm) 274 # list_form.validate(self) 275 # 276 # print list_form.valid_status 277 # print list_form.value_dict 278 # print list_form.error_dict 279 280 # obj = MainForm() 281 # obj.validate(self) 282 # 283 # print "验证结果：", obj.valid_status 284 # print "符合验证结果：", obj.value_dict 285 # print "错误信息:" 286 # for key, item in obj.error_dict.items(): 287 # print key,item 288 # print self.get_arguments('favor'),type(self.get_arguments('favor')) 289 # print self.get_argument('favor'),type(self.get_argument('favor')) 290 # print type(self.get_argument('fff')),self.get_argument('fff') 291 # print self.request.files 292 # obj = MainForm() 293 # obj.validate(self) 294 # print obj.valid_status 295 # print obj.value_dict 296 # print obj.error_dict 297 # print self.request,type(self.request) 298 # obj.fff.save(self.request) 299 # from tornado.httputil import HTTPServerRequest 300 # name_list = self.request.arguments.keys() + self.request.files.keys() 301 # print name_list 302 # print self.request.files,type(self.request.files) 303 # print len(self.request.files.get('fff')) 304 305 # obj = MainForm() 306 # obj.validate(self) 307 # print obj.valid_status 308 # print obj.value_dict 309 # print obj.error_dict 310 # obj.fff.save(self.request) 311 self.write('ok') 312 313 314 315 settings = { 316 'template_path': 'template', 317 'static_path': 'static', 318 'static_url_prefix': '/static/', 319 'cookie_secret': 'aiuasdhflashjdfoiuashdfiuh', 320 'login_url': '/login' 321 } 322 323 application = tornado.web.Application([ 324 (r"/index", MainHandler), 325 ], **settings) 326 327 328 if __name__ == "__main__": 329 application.listen(8888) 330 tornado.ioloop.IOLoop.instance().start()
