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httpPost

and

setDoOutput()

methods. Additionally, the connection shouldn’t use any cached data, so

setUseCaches()

is given an argument of

false

. Just as with the XML HTTP request object, you must

set the

“Content-Type”

header to the appropriate value using the

setRequestProperty()

method:

function httpPost(sURL, sParams) {

var oURL = new java.net.URL(sURL);

var oConnection = oURL.openConnection();

oConnection.setDoInput(true);

oConnection.setDoOutput(true);

oConnection.setUseCaches(false);

oConnection.setRequestProperty(“Content-Type”,

“application/x-www-form-urlencoded”);

//...

}

After the connection has been set up, it’s possible to get an output stream for the request. It’s on the out-

put stream that you place the parameter string using the

writeBytes()

method. After that, a call to

flush()

sends the data along, and the stream can be closed:

function httpPost(sURL, sParams) {

var oURL = new java.net.URL(sURL);

var oConnection = oURL.openConnection();

oConnection.setDoInput(true);

oConnection.setDoOutput(true);

oConnection.setUseCaches(false);

oConnection.setRequestProperty(“Content-Type”,

“application/x-www-form-urlencoded”);

var oOutput = new java.io.DataOutputStream(oConnection.getOutputStream());

oOutput.writeBytes(sParams);

oOutput.flush();

oOutput.close();

//...

}

The next part of the function gets the input stream for the connection and reads the data in, line-by-line,

similar to the

httpGet()

function. Then, the input stream is closed, and the response text returned as

the function value:

function httpPost(sURL, sParams) {

var oURL = new java.net.URL(sURL);

var oConnection = oURL.openConnection();

oConnection.setDoInput(true);

oConnection.setDoOutput(true);

oConnection.setUseCaches(false);

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Client-Server Communication

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