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JavaScript cross domain request solution
1. What is cross domain? We may often using AJAX to request data from other domain, now we will have cross domain request issues. It's because JavaScript only allows to request data from the same domain because of security consideration. In short, same domain strategy means a piece of code can read data from the same source, the same source here means the combination of the same domain, protocol and port number. For example: URLDescriptionAllow communication? http://www.a.com/a.js http:/...
AJAX,cross domain,security 2013-03-13 20:04:52
Format JSON data on Ubuntu
JSON now becomes a very popular data format because of its simplicity and light-weight. Nowadays many RESTful APIs will offer a choice of exchanging JSON data between the server and client. Sometimes the data may not be formatted and it cannot be easily read by human beings. It's frequently desired that the unformatted JSON data should be formatted before read. Today we will show a few ways to format JSON data on Ubuntu. Assume we have a json file test.json with below content. { "title": "Test"...
RUBY,PYTHON,NODEJS,JSON,JQ,PERL,LINUX,UBUNTU,YAJL 2016-08-17 11:05:09
Tips and tricks about JavaScript from Google
JavaScript is now a very popular client side language. It's flexible, powerful but easy to make mistakes. So good programming style is better for you to write efficient and readable JavaScript codes. Here are some tips and tricks about JavaScript from Google. True and False Boolean Expressions The following are all false in boolean expressions: null undefined '' the empty string 0 the number But be careful, because these are all true: '0' the string [] the empty array {}&n...
JavaScript, Google, Coding standard 2013-02-26 23:11:03
php://input in PHP
When using xml-rpc, server side will get the data from client with php://input method instead of $_POST. Hence today we will discuss php://input. PHP official manual has below explanation to php://input: “php://input allows you to read raw POST data. It is a less memory intensive alternative to $HTTP_RAW_POST_DATA and does not need any special php.ini directives. php://input is not available with enctype=”multipart/form-data”. Here we und...
php://input, IO, input 2013-02-25 20:43:00
Benefits and Drawback of a Layered Architecture
Most enterprises today are application centric. But the problem with the application is that their database schemas, user interfaces, programming interfaces and object models are tightly coupled and difficult to change. If you want to add a new field to a database table and you’re lucky, the change will reflect through the entire system. But often the change needs to be replicated manually across the entire system. And as applications are difficult to change, adding business rules or proce...
JAVA, PROGRAMMING,WEB DEVELOPMENT,ENTERPRISE APPLICATION 2017-05-04 08:19:34
How key-based cache expiration works
There are only two hard things in Computer Science: cache invalidation and naming things — Phil Karlton Doing cache invalidation by hand is an incredibly frustrating and error-prone process. You’re very likely to forget a spot and let stale data get served. That’s enough to turn most people off russian-doll caching structures, like the one we’re using for Basecamp Next. Thankfully there’s a better way. A much better way. It’s called key-based cac...
Cache,Expiration,Key-base cache,Work 2012-02-20 05:32:40
Why Javascript is a Joy
I’m probably a bit biased – being a front-end web developer for a few years will do that – but I really enjoy writing Javascript. I’ve recently retreated from pure coding the last few months, but I got an opportunity this past week to jump back into some tasks, and it has reminded me how fun it is to dive into our[1] front-end codebase. Yes, Javascript can be surprisingly elegant yet completely infuriating, and all on the same line of code; for a long time, ...
JavaScript,Speed,Simplicity,Malleable 2012-03-26 15:00:31
What you may not know about PHP session
When we access one website, the site usually should have a mechanism to keep track of the status of the user on the site. There are a few mechanisms supported by many server side languages to help track user status such as session and cookie. Today we will talk about session, when creating a session, we need to keep track of many data, besides user data, we also need to tell the server what is the timeout of the session so that we can garbage collect the session data which should not be stored a...
PHP session,session timeout,example 2013-07-06 08:44:18
Kubernetes Authentication & Authorization 101
If we want to build a system with user modules, Authentication and Authorization are something that we can never ignore, though they could be fuzzy to understand. Authentication (from Greek: αá½θεντικÏŒς authentikos, “real, genuine”, from αá½θÎντης authentes, “author”) is the act of proving an assertion, such as the identity of a computer s...
RBAC,AUTHORIZATION,AUTHENTICATION,KUBERNETES 2021-06-05 23:19:18
The Tale Of Perfect Checkout Page & Magento Online Store
I bet you've already googled every bit of advice on how to win customers. You've installed and integrated bazillions of extensions and marketing tools, rewritten every piece of text on your site, redesigned and rebranded your Magento store. In case you're still wondering why clients keep coming and going away without purchasing your goods, this article is for you. I solemnly declare that every single piece of advice on leading a customer to buy from your online store, you've read so far is imper...
magento, magento user experience, ecommerce, online business 2015-04-16 21:15:09
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