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ObjectiveBefore we briefly explained the use of the script tag (JSONP) and the IFRAME tag (window.name, Location.hash) to exchange data across domains, today we'll learn about the HTML5 API and use PostMessage to exchange data across domains. And

Java concurrent programming (2) immutability of objects and secure release objects1. immutability Another way to meet synchronization needs is to use Immutable objects ). So far, we have introduced many problems related to atomicity and visibility,

Preliminary Research on concurrent programming-object sharing and concurrent programmingObject sharing 1. Visibility In the absence of synchronization, the compiler and runtime may make some unexpected adjustments to the execution sequence of the

CSS Cascading Style sheets can be more granular to the page style settings, of course, some people like the font of custom text, but the default font-family built-in font style is only a few.650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/

Previous wordsThe basic certification described in the previous article is convenient and flexible, but extremely unsafe. The user name and password are transmitted in clear text, and no action is taken to prevent tampering with the message. The

One, the same-origin strategy:When it comes to cross-domain requests, you first have to talk about the same origin strategy:In 1995, the same-origin policy was introduced by the Netscape company to the browser. Currently, all browsers implement this

Normal use of AJAX requires consideration of cross-origin issues, so great programmers have developed a series of cross-origin solutions, such as JSONP, flash, ifame, and xhr2. This article describes how to use CORS to implement cross-origin. For

Suggestions for solving Java programming language thread problems (4) -- Linux general technology-Linux programming and kernel information, the following is a detailed description. Access problems The lack of good access control will make thread

Jstl Overview of Jstl Apache stuff that relies on El Use Jstl to import Jstl1.2.jar Four tag libraries: Core: Key Library, focusFMT: Formatting: date, numberSQL: ObsoleteXML: Obsolete

Learn Python collections every dayLearn Python collections every day Based on the built-in data types (dict, list, set, and tuple), the collections module provides several additional data types: ChainMap, Counter, deque, defaultdict, namedtuple,

Linux basic commandsLinux IntroductionKernel Library :. so shared object, windows: dll dynamic link library application Linux basic principles: 1. composed of a single small program with a single purpose; combined with a small program to complete

The main way I studied Django was http://djangobook.com, and the author's book appeared to have been published. The author's thinking is very refreshing, the explanation is easy to understand, the depth of the place in depth, I like, more than the

Part 1: functional issues of Microsoft's academic search website According to the instructor's blog requirements, after reading the related functions of the Microsoft academic search project, I personally tested most of the search functions (in fact,

The fourth chapter object and classOOP three features: behavior, State, identity of an objectRelationships between classes: dependencies, aggregations, inheritanceDependency: The method of one class manipulates an object of another class.

Fifth Chapter Succession1. Class Superclass sub-classInheritance: Extends (all inheritance sick a public inheritance, no private inheritance and protection inheritance)c+++: By:2. Using super (C # using base) to call the base class methodThe

With the release of iOS 9 and OS X EI Capitan, Apple officially introduced the concept of applying the communication security model. In short, the application communication security model requires that applications require the use of the best secure

This article is a series of articles, I am in the long-distance development of Android a little thoughts and records, I will try to follow the first easy after the difficult sequence to write the series. The series cited the "Android Development art

One, the front desk to solveUse JSONP, but only get requests occurSecond, the Backstage solutionSetting the response headerResponse.setheader ("...", "......" ); 1.access-control-allow-origin The returned resource needs to have a

Du-sh * shows the size of some files Df-h is there any remaining disk space?-a All file system list-H easy-to-read display of 1k=1000 instead of 1k=1024 copy source resources to target directory scp-r [email Protected]:/roo

File descriptor When it comes to files and file systems, it's subconsciously thought that they exist on disk. However, the disk can only be passive storage, but can not take the initiative to process the files, to process the files, can only