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index.js
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63 lines (63 loc) · 1.94 KB
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var get = function get(uri, callback, onError) {
var request = new XMLHttpRequest();
request.addEventListener('load', function() {
callback(request.responseText);
});
request.addEventListener('error', onError);
request.open('GET', uri);
request.send();
};
var evaluate = function evaluate(js) {
var buffer = [];
// Save the old console.log function
var oldLog = console.log;
console.log = function(s) {
// Push log output into a temporary buffer
// which will be returned to PSCi.
buffer.push(s);
};
// Replace any require(...) statements with lookups on the PSCI object.
var replaced = js.replace(/require\("[^"]*"\)/g, function(s) {
return "PSCI['" + s.substring(12, s.length - 2) + "']";
});
// Wrap the module and evaluate it.
var wrapped =
[ 'var module = {};'
, '(function(module) {'
, replaced
, '})(module);'
, 'return module.exports["$main"] && module.exports["$main"]();'
].join('\n');
new Function(wrapped)();
// Restore console.log
console.log = oldLog;
return buffer.join('\n');
};
window.onload = function() {
var socket = new WebSocket('ws://localhost:' + location.port);
var evalNext = function reload() {
get('js/latest.js', function(response) {
try {
var result = evaluate(response);
socket.send(result);
} catch (ex) {
socket.send(ex.stack);
}
}, function(err) {
socket.send('Error sending JavaScript');
});
};
socket.onopen = function() {
console.log('Connected');
socket.onmessage = function(event) {
switch (event.data) {
case 'eval':
evalNext();
break;
case 'reload':
location.reload();
break;
}
};
};
};