#
# JSON-RPC demo client contributed by Christoph Zwerschke
#
try:
import simplejson
except ImportError:
simplejson = None
from ExamplePage import ExamplePage
class JSONRPCClient(ExamplePage):
"""Demo client for using the JSON-RPC example."""
def writeJavaScript(self):
ExamplePage.writeJavaScript(self)
if not simplejson:
return
self.write('''\
<script type="text/javascript" src="jsonrpc.js"></script>
<script type="text/javascript">
<!--
jsonrpc = new JSONRpcClient("JSONRPCExample");
methods = jsonrpc.system.listMethods();
function dojsonrpc() {
p = document.getElementById("parameter").value;
i = document.getElementById("method").selectedIndex;
r = jsonrpc[methods[i]](p);
document.getElementById("result").value = r;
}
-->
</script>
''')
def writeContent(self):
self.write('''\
<h3>JSON-RPC Example</h3>
<p>This example shows how you can call methods
of a <a href="http://json-rpc.org">JSON-RPC</a> servlet
built with Webware for Python from yourwebbrowser import
via JavaScript (which has to be activated to run this demo).
<noscript><span style="color:red">
Unfortunately, JavaScript is not activated.
</span></noscript></p>
<p>The example uses a JSON-RPC JavaScript client
based on Jan-Klaas' "JavaScript o lait" library
(<a href="http://jsolait.net">jsolait</a>).
You can also use other JavaScript libraries and toolkits
such as <a href="http://dojotoolkit.org">dojo</a> or
<a href="http://pyjamas.pyworks.org">pyjamas</a>
for that purpose.</p>
<p>In order to run the JSON-RPC servlet,
<a href="http://cheeseshop.python.org/pypi/simplejson">simplejson</a>
must be installed on your server.''')
if not simplejson:
self.write(''' <span style="color:red">
Unfortunately, simplejson is not installed.</span>''')
return
self.write('''</p>
<p>Type in any example text to be used as input parameter,
choose one of the available methods to be invoked by the
example servlet and press the button to display the result.</p>
<table>
<tr align="center">
<th>Input parameter</th>
<th>Remote method</th>
<th>Result</th>
</tr><tr align="center">
<td>
<input id="parameter" type="text" size="20" value="Hello, World!">
</td><td>
<select id="method" size="1">
<script type="text/javascript">
<!--
for (m in methods)
document.writeln('<option>' + methods[m] + '</option>');
-->
</script>
</select>
</td><td>
<input type="text" size="20" id="result">
</td>
</tr><tr align="center">
<td colspan="3">
<input type="button" value="Invoke remote method"
onclick="dojsonrpc()">
</td>
</tr>
</table>
''')
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