Yuan: /* Overview of the OPeNDAP Client */

2008-01-26T14:11:14Z

Overview of the OPeNDAP Client

← Older revision		Revision as of 14:11, 26 January 2008
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	library.		library.

	~~\figureplace~~[The Original Program]		<center>

			[[Image:orig-client.gif\|actual size]]

			The Original Program

			</center>



	The Original Program, untouched by		The Original Program, untouched by
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	data.		data.

	~~\htmlonly{\html{hr}}}{htb}{fig,orig~~-~~client}~~
			<center>

			[[Image:client-arch1.gif\|actual size]]

			The Modified Program

	~~{orig-client.ps}{orig-client.gif}{}~~		</center>

	~~\figureplace[The Modified Program]~~

	The Modified Program, using the		The Modified Program, using the
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	HTTP GET requests to a OPeNDAP server. The client code is unchanged.		HTTP GET requests to a OPeNDAP server. The client code is unchanged.

			<center>

			[[Image:client-arch2.gif\|actual size]]

			The Another Way

			</center>


	~~{client-arch2.ps}{client-arch2.gif}{}~~

	~~\figureplace[Another Way]~~

	Another Way. An application program can		Another Way. An application program can also call the OPeNDAP DAP directly, eliminating the need for a client library. When starting from scratch, this is probably easiest, unless you are an old hand at one of the supported data access APIs.
	also call the OPeNDAP DAP directly, eliminating the need for a client
	library. When starting from scratch, this is probably easiest,
	unless you are an old hand at one of the supported data access APIs.

Yuan: New page: =Overview of the OPeNDAP Client= A OPeNDAP client is any web client that makes a service request to a OPeNDAP server. Since several of the OPeNDAP services return ASCII and HTML data, a...

2007-09-28T03:48:25Z

New page: =Overview of the OPeNDAP Client= A OPeNDAP client is any web client that makes a service request to a OPeNDAP server. Since several of the OPeNDAP services return ASCII and HTML data, a...

New page

=Overview of the OPeNDAP Client=

A OPeNDAP client is any web client that makes a service request to a OPeNDAP
server. Since several of the OPeNDAP services return ASCII and HTML
data, any web browser, such as Netscape Navigator can be considered a
OPeNDAP client, so long as it is in the process of making a suitable
request to a OPeNDAP server. The clients of interest in this appendix,
however, are clients that use the OPeNDAP DAP (Data Access Protocol)
library to make their requests for data.

Of these clients, there are two varieties: clients that have been
written expressly for OPeNDAP, and clients that existed in some form
already, and that have been adapted to use with a OPeNDAP client
library.

\figureplace[The Original Program]

The Original Program, untouched by
OPeNDAP. The application's code accesses data by calls to the netCDF
library functions, linked with the program. Data access is direct,
with the application program accessing local disk files to read
data.

\htmlonly{\html{hr}}}{htb}{fig,orig-client}

{orig-client.ps}{orig-client.gif}{}

\figureplace[The Modified Program]

The Modified Program, using the
OPeNDAP netCDF client library. The application's code now accesses
data by calls to the OPeNDAP netCDF library functions. These are
written to be functionally identical to the original netCDF
functions, but instead of using a local disk to retrieve data, this
library invokes functions from the OPeNDAP DAP library, which makes
HTTP GET requests to a OPeNDAP server. The client code is unchanged.

{client-arch2.ps}{client-arch2.gif}{}

\figureplace[Another Way]

Another Way. An application program can
also call the OPeNDAP DAP directly, eliminating the need for a client
library. When starting from scratch, this is probably easiest,
unless you are an old hand at one of the supported data access APIs.

ProgrammerGuideChapter7 - Revision history

Yuan: /* Overview of the OPeNDAP Client */

Yuan: New page: =Overview of the OPeNDAP Client= A OPeNDAP client is any web client that makes a service request to a OPeNDAP server. Since several of the OPeNDAP services return ASCII and HTML data, a...