SEARCH KEYWORD -- Asynchronous request


  New HTTP status code: 451 Unavailable for Legal Reasons

On June 11th,2012, Google proposed a new HTTP status code to indicate webpage contents which are not conform to law. The new HTTP status code is 451 Unavailable for Legal Reasons. Google Android Developer Advocate Tim Bray submitted the draft for the new HTTP status code, it will be used on some webpages which can not be served because of legal reasons. Visitors will know that the page cannot be seen because of the government censorship.According to the draft, responses using this status code sh...

   HTTP status,451,Tim Bray     2012-06-12 09:07:44

  Android socket programming example

Socket is a kind of interface for different sides t communicate, it usually identified by an IP and a port. There are many server side software on a server and they would provide different service. Each server many create some sockets and bind them to some ports so that clients can listen to. Software on the Internet will exchange data though a bidirectional connection established. Each end of the connection has a socket created. In Java, Socket and ServerSocket are in java.net package, ServerSo...

   Android,Socket,Java     2013-05-11 22:17:16

  Alibaba gains spotlight due to female employee alleging sex harassment from supervisor

During the weekend, the Chinese e-commerce giant Alibaba gains spotlight from Chinese general public due to a hot discussion going on on various Chinese social media platforms where a female employee alleges that her supervisor(alias Yi Qu) conducted sex harassment on her during a previous business trip. The case happened a couple of weeks back where the female employee at Alibaba was asked by her direct supervisor to go for a business trip to Shandong province(a northern province in China), sh...

   ALIBABA,SEX HARASSMENT     2021-08-07 22:27:02

  Recursive class initialization in Java

When a Java class is referenced and initialized, it has to go through the loading and linking first. Once the loading and linking complete successfully. The class will be initialized. The static variables and constant variables will be initialized during this process. Once the class is initialized, it is ready for use. If when class A is initialized and it is referencing a class B, the class B will also get initialized. But what will happen if class B is referencing class A as well? This is call...

   Java,JVM,class initialization,static final     2015-04-15 21:04:29

  Keys to increase website conversion rate

In internet marketing, conversion rate is the ratio of visitors who convert casual content views or website visits into desired actions based on subtle or direct requests from marketers, advertisers, and content creators.Successful conversions are interpreted differently by individual marketers, advertisers, and content creators. To online retailers, for example, a successful conversion may constitute the sale of a product to a consumer whose interest in the item was initially sparked by clickin...

   Conversion rate, Website,Sale     2012-07-12 11:04:38

  Many Chinese applicants to US universities may be affected by Gmail cut out

Just after Christmas, many Chinese found that they could not connect to Gmail anymore in mainland China. Since Google announced leaving from China in 2010, the web version of Gmail was not accessible anymore. But people from China could still access Gmail through some Gmap apps. This time, Gmail is not accessible even with these apps. It is said that all the mail service protocols of Gmail including IMAP/POP/SMTP have been cut out by Chinese government. This means no mails can be sent to or rece...

   Gmail, China, Gmail cut out     2014-12-30 00:35:28

  Redis Cluster and Common Partition Techniques in Distributed Cache

In this post, I will discuss a few common partition techniques in distributed cache. Especially, I will elaborate on my understanding on the use of Redis Cluster. Please understand that at the time of writing, the latest version of Redis is 4.0.10. Many articles on the same topic have a different idea from this post. This is mainly because, those articles are probably outdated. In particular, they may refer to the Redis Cluster implementation in Redis 3. Redis Cluster has been improved...

   REDIS,DISTRIBUTED CACHE,CLOUD COMPUTING     2019-01-17 08:10:37

  Add Sublime Text to your context menu on right click

When opening a text file, you may be used to right click on the file to be opened and then choose the application which can open the file from the context menu. On the context menu, you may see a menu item like "Edit with Notepad++". Nowadays many people especially programmers like to use Sublime Text, but by default this application will not show on the context menu when you right click on a file. There is now frequent request to add this application to the context menu. Here we show a simple b...

   SUBLIME TEXT,CONTEXT MENU,WINDOWS     2015-10-19 08:51:25

  How does PHP session work?

This article is about how PHP session works internally. Below are the steps : 1. Session in PHP is loaded into PHP core as an extension, we can understand it as an extension. When session extension is loaded, PHP will call core functions to get the session save_handler, i.e interface or functions for reading and writing session data. By default, PHP will handle session data by writing and reading files on the server. But PHP also supplies custom methods for handling session data, we can use sess...

   PHP, session, mechanism     2012-12-28 13:36:49

  Resolving error "SSL certificate problem: self signed certificate in certificate chain"

In a PHP application, cURL is frequently used to make connection to remote server to request some resource. It can be used to transfer data with different protocols such as HTTP, HTTPS, FTP etc. While using cURL in PHP, someone may get an error with message similar to "SSL certificate problem: self signed certificate in certificate chain". This may happen when cURL tries to make a SSL connection server and the server returns a server certificate which is self-signed and it's not trusted by the c...

   PHP,SSL,CURL,TWILIO     2016-06-26 07:17:23

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