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@hagino3000
Created March 14, 2011 21:15
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JSON-RPC for node (express)
/**
* Module dependencies.
*/
var express = require('express');
var rpcMethods = require('./methods.js');
var app = module.exports = express.createServer();
// Configuration
app.configure(function(){
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(__dirname + '/public'));
});
app.configure('development', function(){
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
app.configure('production', function(){
app.use(express.errorHandler());
});
// Routes
app.get('/', function(req, res){
res.redirect('test.html');
});
// RPC end point
app.post('/rpc', function(req, res) {
res.header('Content-Type', 'application/json');
var data = req.body, err = null, rpcMethod;
if (!err && data.jsonrpc !== '2.0') {
onError({
code: -32600,
message: 'Bad Request. JSON RPC version is invalid or missing',
data: null
}, 400);
return;
}
if (!err && !(rpcMethod = rpcMethods[data.method])) {
onError({
code: -32601,
message: 'Method not found : ' + data.method
}, 404);
return;
}
try {
rpcMethod(data.params, {
onSuccess: function(result) {
res.send(JSON.stringify({
jsonrpc: '2.0',
result: result,
error : null,
id: data.id
}), 200);
},
onFailure: function(error) {
onError({
code: -32603,
message: 'Failed',
data: error
}, 500);
}
});
} catch (e) {
onError({
code: -32603,
message: 'Excaption at method call',
data: e
}, 500);
}
return;
function onError(err, statusCode) {
res.send(JSON.stringify({
jsonrpc: '2.0',
error: err,
id: data.id
}), statusCode);
}
});
// Only listen on $ node app.js
if (!module.parent) {
app.listen(3000);
console.log("Express server listening on port %d", app.address().port)
}
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