IETF prior to this, with other widely used instant messaging protocols such as AIM,QQ, which are functionally complete and perfect.XMPP's extended protocol jingle makes IT support voice and video, which is not yet supported by iOS.The official documentation for XMPP is RFC 3920.The XMPP protocol was once a Google push Instant messaging protocol, and its representative work was gtalk.Note: Relative Xml,json is more efficient.2.
iOS development and expansion Chapter-XMPP Brief IntroductionFirst, instant communication Brief introduction1. Brief descriptionInstant Messaging Technology (IM) enables users to chat online in real time. If you want to send a message, the user needs to open a small window to let the user and his friends enter the information and let the conversation both see what they're talking about.There are many IM systems, such as AOL IM, Yahoo IM, MSN and QQ, t
iOS development and expansion Chapter-XMPP Brief IntroductionFirst, instant communication Brief introduction1. Brief descriptionInstant Messaging Technology (IM) enables users to chat online in real time. If you want to send a message, the user needs to open a small window to let the user and his friends enter the information and let the conversation both see what they're talking about.There are many IM systems, such as AOL IM, Yahoo IM, MSN and QQ, t
-grained replication and permission management based on hierarchical directories and rows.
Supports strong consistency and weak consistency control across data centers.
Highly consistent copy Synchronization Based on the paxos algorithm and supports distributed transactions.
Provides many automated operations.
Powerful scalability, supporting clusters with millions of servers.
You can customize important parameters such as latency and number of copies to meet different requirement
Google can't open Google can't open, with the Chinese mainland blocked, but mainly because of the recent googleserver in the global scope of the layout adjustment.The solution is simply to change the user's local computer Hosts file to be able to.First,How Windows system changes the Hosts fileWindows system Hosts file on local computer C drive, path is: C:\Windows\System32\drivers\etcOpen the Hosts file wit
Google Font [translated from Google official documentation], Google font
This Guide explains how to use Google Font APIs to add network fonts to your own pages. You don't need any encoding. All you have to do is add a specific CSS to the HTML page and associate the font with the CSS style.A quick example:This is an exa
Interesting and uninteresting, everyone has their own different standards. Here we introduce some of the more interesting utilities and extensions on Safari, and don't know if you've used them all?
If you're using a browser and you fancy its accessories and extensions, then Apple's Safari might not be for you. Google Chrome also has Mozilla Firefox, which has a much larger expansion kit than the MAC S
Today, Google (Google) code search landing in Google www.google.cn/codesearch Google code search to provide you with a search on the internet can be publicly accessible source of the site, so as to help you find functional definitions and code samples. With Google code searc
There are some Google API introductions, but in actual development we may need to convert the JSON data returned by the Google RESTful API into XML data input into a third-party system, which is very common in enterprise application integration. Then there is the question of how to ensure that the converted XML data format is canonical, which requires XML Schema (XML) for validation. Now the point is, we on
Having said so much, let me first take Google Discovery RESTful services as an example to show you how to call Google Discovery RESTful services with the most common Java code.Introduction:Under "How to integrate with Google APIs and Google Apps (2)", I've listed all of the Google
the plugin. 4. Install pepper Flash Plugin:4.1. Download HUGHESJR Auxiliary installation script:cd/tmpwget https://raw.github.com/hughesjr/chromium_el_builder/master/chrome_pepperflash_copy.sh4.2. Set chrome_pepperflash_copy.sh as executable:chmod +x chrome_pepperflash_copy.sh4.3, execute the script to install (you can look at the script content to understand what happened):./chrome_pepperflash_copy.shafter installation, if you need to start from the command line (with flash support), you can e
Google has launched a feature called the local merchant center, which is officially introduced by Google. This feature allows you to easily rank your website keywords first in the search results, in addition, there are map navigation, contact information, and other content. Their graphic effects are quite attractive and more attractive than other ranking positions. However, these words can only be confined
In the Google RESTFul API, the Google Blogger API (Google Blog API) should be close to our lives, as nearly a lot of people are reading blogs every day and have heard of blogs. In a series of articles in front of Google's application system for integration (5) and Google's Applications for integration (6). We mentioned how to convert the JSON schema of
Always like to use Google and Firefox, but the browser default features are very few, the interface is not very good, so this time you need browser three great artifacts: extensions, scripts, Styles . Google Chrome Plus, I call him that, in fact, is a green portable multi-functional Google browser , is my first custom version, is made with shuax patches, we can e
When a developer increases the load on a computer system, it is common to consider two ways of scaling vertically and horizontally. The choice of which strategy depends mainly on the problem to be solved and the limitation of system resources. In this article we will describe both strategies and discuss the pros and cons of each. If you already have a software system that needs to grow, you will intentionally or unintentionally choose one of these two strategies.Vertical expansionIn the vertical
In the article SEO Learning Network: Keyword expansion should be done (on), first from four aspects and you share the common methods of keyword expansion, are keyword-related tools, search box tips, related search, other tools, and so on, and then the article today, from the other four aspects and share, The key words are different forms, supplementary words, from the flow data mining, cross combination of
Last time in HashMap source reading (1)-initial value, data structure, hash calculation article describes the initial size of HashMap, the underlying storage structure, as well as the hash value calculation and index calculation, this article will continue to understand the problem of hash collision and expansion in HashMap1) Hash collisionTalk about hash, have to mention of course is the problem of hash collision, so-called hash collision, simply sai
This series of articles is produced by @ simple ink _ Mao yunxing. Please indicate the source for reprinting.
Article: http://blog.csdn.net/poem_qianmo/article/details/23710721
Author: Mao yunxing (light ink) mailbox: happylifemxy@163.com
The OpenCV version used to write the current blog: 2.4.8
In this article, we explore the most basic morphological operations in image processing-expansion and corrosion. At the beginning of the ar
Laboratory Equipment:1 routeros5.24 Version Router1 Cisco 2960 Switches2 100M Telecom Bandwidth: 1 downstream 100M Uplink 8M, the other line 100M upstream 4MExperimental Purpose:Overlay multiple internet broadband to increase the company's network demand. In this experiment, there are only two broadband, it is possible to reach hundreds of broadband access, then use a network card access is not very realistic. Use the switch extension to increase the bandwidth access portExperimental steps:One:
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