Page 135 - DCAP512_WAP_AND_WML

Unit 9: Working with user Input

URL. Since a URL can only contain a limited number of characters, the GET method has the Notes
disadvantage that there is a size limit for the data to be sent. If the user data contains non-ASCII
characters, you should make use of the POST method to avoid encoding problems.
The href attribute of the <go> tag specifies the URL to submit the form data to. In the above WML
example, we instruct the WAP browser to submit the form data to “processing.asp” for processing
when the “Submit Data” anchor link is selected.
Four <postfield/> tags has been enclosed in the <go></go> tags in the above WML example.
The <postfield/> tag is used to specify the name-value pairs to be submitted to the server.
The <postfield/> tag has two attributes, name and value. As their names suggest, the name
attribute specifies the name of the parameter to be sent and the value attribute specifies the
value of the parameter.

Notes Notice the difference between HTML and WML here. In HTML, the name attribute
of the <input> and <select> tags is used to specify the name of the parameter to be sent,
while in WML the name attribute of the <postfield> tag is used to do the same thing. In
WML, the name attribute of <input> and <select> is used to specify the name of the
variable for storing the form data.
At the beginning of the above WML document, a value is assigned to the my_temp_id variable.
When the “Submit Data” anchor link is clicked, it is sent to the server as part of the form. We use
it to simulate the function of a hidden field in HTML.

Self Assessment

Fill in the blanks:

14. To submit data to the server in WML, you need the ……………………. and <postfield/> tags.
15. The <postfield/> tag is used to specify the ……………………. pairs to be submitted to the
server.



Caselet WAP Still Finding its Feet in India

IRELESS application protocol (WAP), the new age technology that provides
instant connectivity, anytime, anywhere, may not take off in India for at least
Wanother year, according to experts.

“WAP in India is still at a nascent stage and it will take at least a year or two for the
technology to become effectively operational here,” Mr. R. Trivedi, Partner, Ernst and
Young, said.
There are various constraints that will hamper widespread use of this service, the first
being the cost of WAP-enabled handsets.

Most WAP-enabled mobile phones cost more than 20,000. A Nokia 7110, for instance,
costs 23,299 and an Ericsson R320 is priced at 31,995. According to analysts, unless prices
come down to around 10,000, WAP will be an expensive proposition.
Contd...

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