token | 易学教程

go语言实现限流器

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本文：https://chai2010.cn/advanced-go-programming-book/ch5-web/ch5-06-ratelimit.html Ratelimit 服务流量限制计算机程序可依据其瓶颈分为磁盘IO瓶颈型，CPU计算瓶颈型，网络带宽瓶颈型，分布式场景下有时候也会外部系统而导致自身瓶颈。 Web系统打交道最多的是网络，无论是接收，解析用户请求，访问存储，还是把响应数据返回给用户，都是要走网络的。在没有 epoll/kqueue 之类的系统提供的IO多路复用接口之前，多个核心的现代计算机最头痛的是C10k问题，C10k问题会导致计算机没有办法充分利用CPU来处理更多的用户连接，进而没有办法通过优化程序提升CPU利用率来处理更多的请求。自从Linux实现了 epoll ，FreeBSD实现了 kqueue ，这个问题基本解决了，我们可以借助内核提供的API轻松解决当年的C10k问题，也就是说如今如果你的程序主要是和网络打交道，那么瓶颈一定在用户程序而不在操作系统内核。随着时代的发展，编程语言对这些系统调用又进一步进行了封装，如今做应用层开发，几乎不会在程序中看到 epoll 之类的字眼，大多数时候我们就只要聚焦在业务逻辑上就好。Go 的 net 库针对不同平台封装了不同的syscall API， http 库又是构建在 net 库之上

Sevice Computing：简单 web 服务与客户端开发实战

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Sevice Computing：简单 web 服务与客户端开发实战 1、项目概述 2、我负责的部分顶层设计：API设计及说明基于token的身份验证所有README.md的撰写，项目文档编写 1、项目概述利用 web 客户端调用远端服务是服务开发本实验的重要内容。其中，要点建立 API First 的开发理念，实现前后端分离，使得团队协作变得更有效率。任务目标选择合适的 API 风格，实现从接口或资源（领域）建模，到 API 设计的过程使用 API 工具，编制 API 描述文件，编译生成服务器、客户端原型使用 Github 建立一个组织，通过 API 文档，实现客户端项目与 RESTful 服务项目同步开发使用 API 设计工具提供 Mock 服务，两个团队独立测试 API 使用 travis 测试相关模块 2、我负责的部分顶层设计：API设计及说明首先对swapi原网页进行各种可能的操作，熟悉它所能够提供的API 3个页面：注册页面，登录页面和查询页面。这里我们设计了两种方式可以到达查询页面，一种是需要登录到用户界面，这就需要经过注册和登录两步，而另外一种是游客用户的形式，可以直接进到查询页面。服务 API 我们设计的API可以实现如下内容： 1. 注册用户 /register POST 2. 用户登录 /login POST 3. 获取资源目录

MultiValueDictKeyError in Django when use POST

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问题 I am new to Django rest framework and was asked to write the token authentication part of our project. One thing to note is, as I would use not use the default admin site in future, I write login, logout, signup functions, and test the functionality by POSTMAN. What I want to do now is to let new user signup, login and logout. When a user log in, I issue him/her a token. Everything just perform in the easiest way. But I still can't work it out. I searched all the related questions but still

zero width token?

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问题 I want to ask a very basic question about token, while reading about regex,the book tag caret(^) as a zero width token, can you please tell me what actually it means by zero width? 回答1: It means that it matches without consuming any characters. It is simply a positional assertion ("must be at the start of the line"). Another example is zero-width look-ahead and look-behind assertions. For instance, the Perl regex /abc(?=123)/ matches the sequence abc only if it is followed by the sequence 123

How do I tokenise a word given tokens that are subsumed incompletely in the word?

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问题 I understand how to use regex in Perl in the following way: $str =~ s/expression/replacement/g; I understand that if any part of the expression is enclosed in parentheses, it can be used and captured in the replacement part, like this: $str =~ s/(a)/($1)dosomething/; But is there a way to capture the ($1) above outside of the regex expression? I have a full word which is a string of consonants, e.g. bEdmA , its vowelized version baEodamaA (where a and o are vowels), as well its split up form

Unique token with form submit doesn't seem to work

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问题 This is what I want to do: Prevent a user to submit a form twice using a unique token. I think I have the right code here, but it still dosn't work. The output is "Don't send twice" the first time the form is submitted. What am i doing wrong? <?php session_start(); ?> <html> <body> <?php $_SESSION['token'] = md5(session_id() . time()); ?> <?php if (isset($_SESSION['token'])) { if (isset($_POST['token'])) { if ($_POST['token'] != $_SESSION['token']) { echo "Don't send twice!"; } } } else {

Good idea to use REST token authentication for AJAX web apps?

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问题 I created a REST web API using Python/Django and the excellent Django REST Framework. I'm experimenting with authentication methods at the moment and was wondering if it's a good practice to use "token authentication" for AJAX web apps. I included a sample HTML file with a very basic CRUD web app, demonstrating how I'm using token authentication at the moment. It works fine, but is it really OK (regarding security and so) to just include the authentication token in the source? Basic

Getting Token in Orion Context Broker

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问题 I'm trying to get an Authentication Token in order to start querying some information. The problem is that when I execute the Token Script in Linux and I type my name and password, the server doesn't give me the token. I just get an empty space. Does anybody know how to proceed? EDIT : I just type wget --no-check-certificate https://raw.githubusercontent.com/fgalan/oauth2-example-orion-client/master/token_script.sh bash token_script.sh In the Command Window in Ubuntu. The script asks me a

Store Access Token in Android Local Storage?

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问题 I am not able to Store access-token,username in the SharedPreferences.How can this be Done? Login Class public class Login extends AppCompatActivity implements View.OnClickListener { EditText userName, Password; Button login; public static final String LOGIN_URL = "http://192.168.100.5:84/Token"; public static final String KEY_USERNAME = "UserName"; public static final String KEY_PASSWORD = "Password"; String username, password, accesstoken, tokentype; @Override protected void onCreate(Bundle

Using strtok in C++

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问题 I'm trying to read a file which has input(time and price) as: 12:23:31 67 12:31:23 78 [...] I created a struct which holds values of hour, minutes and seconds. I used strtok to tokenize the individual values and use atof to store them. However, I'm getting an error when I try to tokenize the time: cannot convert std::string' to 'char*' for argument 1 to 'char*' struct time { int hours; int minutes; int seconds; double price; }; int main() { string file, input; time* time_array; char* tok;