/examples/jsonrpc/JSONRPCExample.py

 1from ui import RootPanel, TextArea, Label, Button, HTML, VerticalPanel, HorizontalPanel, ListBox
 2from JSONService import JSONProxy
 3
 4class JSONRPCExample:
 5    def onModuleLoad(self):
 6        self.TEXT_WAITING = "Waiting for response..."
 7        self.TEXT_ERROR = "Server Error"
 8        self.METHOD_ECHO = "Echo"
 9        self.METHOD_REVERSE = "Reverse"
10        self.METHOD_UPPERCASE = "UPPERCASE"
11        self.METHOD_LOWERCASE = "lowercase"
12        self.methods = [self.METHOD_ECHO, self.METHOD_REVERSE, self.METHOD_UPPERCASE, self.METHOD_LOWERCASE]
13
14        self.remote_php = EchoServicePHP()
15        self.remote_py = EchoServicePython()
16
17        self.status=Label()
18        self.text_area = TextArea()
19        self.text_area.setText(r"{'Test'} [\"String\"]")
20        self.text_area.setCharacterWidth(80)
21        self.text_area.setVisibleLines(8)
22        
23        self.method_list = ListBox()
24        self.method_list.setVisibleItemCount(1)
25        for method in self.methods:
26            self.method_list.addItem(method)
27        self.method_list.setSelectedIndex(0)
28
29        method_panel = HorizontalPanel()
30        method_panel.add(HTML("Remote string method to call: "))
31        method_panel.add(self.method_list)
32        method_panel.setSpacing(8)
33
34        self.button_php = Button("Send to PHP Service", self)
35        self.button_py = Button("Send to Python Service", self)
36
37        buttons = HorizontalPanel()
38        buttons.add(self.button_php)
39        buttons.add(self.button_py)
40        buttons.setSpacing(8)
41        
42        info = r"<h2>JSON-RPC Example</h2><p>This example demonstrates the calling of server services with <a href=\"http://json-rpc.org/\">JSON-RPC</a>."
43        info += "<p>Enter some text below, and press a button to send the text to an Echo service on your server. An echo service simply sends the exact same text back that it receives."
44        
45        panel = VerticalPanel()
46        panel.add(HTML(info))
47        panel.add(self.text_area)
48        panel.add(method_panel)
49        panel.add(buttons)
50        panel.add(self.status)
51        
52        RootPanel().add(panel)
53
54    def onClick(self, sender):
55        self.status.setText(self.TEXT_WAITING)
56        method = self.methods[self.method_list.getSelectedIndex()]
57        text = self.text_area.getText()
58
59        # demonstrate proxy & callMethod()
60        if sender == self.button_php:
61            if method == self.METHOD_ECHO:
62                id = self.remote_php.echo(text, self)
63            elif method == self.METHOD_REVERSE:
64                id = self.remote_php.callMethod("reverse", [text], self)
65            elif method == self.METHOD_UPPERCASE:
66                id = self.remote_php.uppercase(text, self)
67            elif method == self.METHOD_LOWERCASE:
68                id = self.remote_php.lowercase(text, self)
69        else:
70            if method == self.METHOD_ECHO:
71                id = self.remote_py.echo(text, self)
72            elif method == self.METHOD_REVERSE:
73                id = self.remote_py.reverse(text, self)
74            elif method == self.METHOD_UPPERCASE:
75                id = self.remote_py.uppercase(text, self)
76            elif method == self.METHOD_LOWERCASE:
77                id = self.remote_py.lowercase(text, self)
78        if id<0:
79            self.status.setText(self.TEXT_ERROR)
80
81    def onRemoteResponse(self, response, request_info):
82        self.status.setText(response)
83
84    def onRemoteError(self, code, message, request_info):
85        self.status.setText("Server Error or Invalid Response: ERROR " + code + " - " + message)
86
87
88class EchoServicePHP(JSONProxy):
89    def __init__(self):
90        JSONProxy.__init__(self, "services/EchoService.php", ["echo", "reverse", "uppercase", "lowercase"])
91
92
93class EchoServicePython(JSONProxy):
94    def __init__(self):
95        JSONProxy.__init__(self, "services/EchoService.py", ["echo", "reverse", "uppercase", "lowercase"])