Client-side persistent data
Encyclopedia
Client-side persistent data or CSPD is a term used in computing
for storing data required by web applications
to complete internet tasks on the client-side
as needed rather than exclusively on the server
. As a framework it is one solution to the needs of Occasionally Connected Computing
or OCC.
A major challenge for HTTP as a stateless
protocol has been asynchronous tasks. The AJAX
pattern using XMLHttpRequest
was first introduced by Microsoft
in the context of the Outlook
e-mail product.
The first CSPD were the 'cookies'
introduced by the Netscape
Navigator
. ActiveX
components which have entries in the Windows registry
can also be viewed as a form of client-side
persistence
.
Computing
Computing is usually defined as the activity of using and improving computer hardware and software. It is the computer-specific part of information technology...
for storing data required by web applications
Web application
A web application is an application that is accessed over a network such as the Internet or an intranet. The term may also mean a computer software application that is coded in a browser-supported language and reliant on a common web browser to render the application executable.Web applications are...
to complete internet tasks on the client-side
Client-side
Client-side refers to operations that are performed by the client in a client–server relationship in a computer network.Typically, a client is a computer application, such as a web browser, that runs on a user's local computer or workstation and connects to a server as necessary...
as needed rather than exclusively on the server
Server (computing)
In the context of client-server architecture, a server is a computer program running to serve the requests of other programs, the "clients". Thus, the "server" performs some computational task on behalf of "clients"...
. As a framework it is one solution to the needs of Occasionally Connected Computing
Occasionally Connected Computing
Occasionally connected computing is a term used in computing for an architecture or framework which permits running some aspects of a web application when not connected to the Internet...
or OCC.
A major challenge for HTTP as a stateless
Stateless server
In computing, a stateless protocol is a communications protocol that treats each request as an independent transaction that is unrelated to any previous request so that the communication consists of independent pairs of requests and responses...
protocol has been asynchronous tasks. The AJAX
Ajax (programming)
Ajax is a group of interrelated web development methods used on the client-side to create asynchronous web applications...
pattern using XMLHttpRequest
XMLHttpRequest
XMLHttpRequest is an API available in web browser scripting languages such as JavaScript. It is used to send HTTP or HTTPS requests directly to a web server and load the server response data directly back into the script. The data might be received from the server as XML text or as plain text...
was first introduced by Microsoft
Microsoft
Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...
in the context of the Outlook
Outlook Web Access
Outlook Web App , originally called Outlook Web Access and before that Exchange Web Connect , is a webmail service of Microsoft Exchange Server 5.0 and later...
e-mail product.
The first CSPD were the 'cookies'
HTTP cookie
A cookie, also known as an HTTP cookie, web cookie, or browser cookie, is used for an origin website to send state information to a user's browser and for the browser to return the state information to the origin site...
introduced by the Netscape
Netscape
Netscape Communications is a US computer services company, best known for Netscape Navigator, its web browser. When it was an independent company, its headquarters were in Mountain View, California...
Navigator
Netscape (web browser)
Netscape 7 was a series of proprietary cross-platform Internet suites created by Netscape Communications Corporation and then in-house by AOL to continue the Netscape series after Netscape 6. There were three main editions released from the Netscape 7 series; being Netscape 7.0, 7.1 and 7.2...
. ActiveX
ActiveX
ActiveX is a framework for defining reusable software components in a programming language-independent way. Software applications can then be composed from one or more of these components in order to provide their functionality....
components which have entries in the Windows registry
Windows registry
The Windows Registry is a hierarchical database that stores configuration settings and options on Microsoft Windows operating systems. It contains settings for low-level operating system components as well as the applications running on the platform: the kernel, device drivers, services, SAM, user...
can also be viewed as a form of client-side
Client-side
Client-side refers to operations that are performed by the client in a client–server relationship in a computer network.Typically, a client is a computer application, such as a web browser, that runs on a user's local computer or workstation and connects to a server as necessary...
persistence
Persistence (computer science)
Persistence in computer science refers to the characteristic of state that outlives the process that created it. Without this capability, state would only exist in RAM, and would be lost when this RAM loses power, such as a computer shutdown....
.
See also
- Occasionally Connected ComputingOccasionally Connected ComputingOccasionally connected computing is a term used in computing for an architecture or framework which permits running some aspects of a web application when not connected to the Internet...
- Curl (programming language)
- AJAXAjax (programming)Ajax is a group of interrelated web development methods used on the client-side to create asynchronous web applications...
- HTTP