initial checkin

This commit is contained in:
Joe
2017-02-07 12:48:17 -06:00
commit ded9ee7060
5 changed files with 634 additions and 0 deletions

186
EventSource.js Normal file
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;(function (global) {
if ("EventSource" in global) return;
var reTrim = /^(\s|\u00A0)+|(\s|\u00A0)+$/g;
var EventSource = function (url) {
var eventsource = this,
interval = 500, // polling interval
lastEventId = null,
cache = '';
if (!url || typeof url != 'string') {
throw new SyntaxError('Not enough arguments');
}
this.URL = url;
this.readyState = this.CONNECTING;
this._pollTimer = null;
this._xhr = null;
function pollAgain(interval) {
eventsource._pollTimer = setTimeout(function () {
poll.call(eventsource);
}, interval);
}
function poll() {
try { // force hiding of the error message... insane?
if (eventsource.readyState == eventsource.CLOSED) return;
// NOTE: IE7 and upwards support
var xhr = new XMLHttpRequest();
xhr.open('GET', eventsource.URL, true);
xhr.setRequestHeader('Accept', 'text/event-stream');
xhr.setRequestHeader('Cache-Control', 'no-cache');
// we must make use of this on the server side if we're working with Android - because they don't trigger
// readychange until the server connection is closed
xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
if (lastEventId != null) xhr.setRequestHeader('Last-Event-ID', lastEventId);
cache = '';
xhr.timeout = 50000;
xhr.onreadystatechange = function () {
if (this.readyState == 3 || (this.readyState == 4 && this.status == 200)) {
// on success
if (eventsource.readyState == eventsource.CONNECTING) {
eventsource.readyState = eventsource.OPEN;
eventsource.dispatchEvent('open', { type: 'open' });
}
var responseText = '';
try {
responseText = this.responseText || '';
} catch (e) {}
// process this.responseText
var parts = responseText.substr(cache.length).split("\n"),
eventType = 'message',
data = [],
i = 0,
line = '';
cache = responseText;
// TODO handle 'event' (for buffer name), retry
for (; i < parts.length; i++) {
line = parts[i].replace(reTrim, '');
if (line.indexOf('event') == 0) {
eventType = line.replace(/event:?\s*/, '');
} else if (line.indexOf('retry') == 0) {
retry = parseInt(line.replace(/retry:?\s*/, ''));
if(!isNaN(retry)) { interval = retry; }
} else if (line.indexOf('data') == 0) {
data.push(line.replace(/data:?\s*/, ''));
} else if (line.indexOf('id:') == 0) {
lastEventId = line.replace(/id:?\s*/, '');
} else if (line.indexOf('id') == 0) { // this resets the id
lastEventId = null;
} else if (line == '') {
if (data.length) {
var event = new MessageEvent(data.join('\n'), eventsource.url, lastEventId);
eventsource.dispatchEvent(eventType, event);
data = [];
eventType = 'message';
}
}
}
if (this.readyState == 4) pollAgain(interval);
// don't need to poll again, because we're long-loading
} else if (eventsource.readyState !== eventsource.CLOSED) {
if (this.readyState == 4) { // and some other status
// dispatch error
eventsource.readyState = eventsource.CONNECTING;
eventsource.dispatchEvent('error', { type: 'error' });
pollAgain(interval);
} else if (this.readyState == 0) { // likely aborted
pollAgain(interval);
} else {
}
}
};
xhr.send();
setTimeout(function () {
if (true || xhr.readyState == 3) xhr.abort();
}, xhr.timeout);
eventsource._xhr = xhr;
} catch (e) { // in an attempt to silence the errors
eventsource.dispatchEvent('error', { type: 'error', data: e.message }); // ???
}
};
poll(); // init now
};
EventSource.prototype = {
close: function () {
// closes the connection - disabling the polling
this.readyState = this.CLOSED;
clearInterval(this._pollTimer);
this._xhr.abort();
},
CONNECTING: 0,
OPEN: 1,
CLOSED: 2,
dispatchEvent: function (type, event) {
var handlers = this['_' + type + 'Handlers'];
if (handlers) {
for (var i = 0; i < handlers.length; i++) {
handlers[i].call(this, event);
}
}
if (this['on' + type]) {
this['on' + type].call(this, event);
}
},
addEventListener: function (type, handler) {
if (!this['_' + type + 'Handlers']) {
this['_' + type + 'Handlers'] = [];
}
this['_' + type + 'Handlers'].push(handler);
},
removeEventListener: function (type, handler) {
var handlers = this['_' + type + 'Handlers'];
if (!handlers) {
return;
}
for (var i = handlers.length - 1; i >= 0; --i) {
if (handlers[i] === handler) {
handlers.splice(i, 1);
break;
}
}
},
onerror: null,
onmessage: null,
onopen: null,
readyState: 0,
URL: ''
};
var MessageEvent = function (data, origin, lastEventId) {
this.data = data;
this.origin = origin;
this.lastEventId = lastEventId || '';
};
MessageEvent.prototype = {
data: null,
type: 'message',
lastEventId: '',
origin: ''
};
if ('module' in global) module.exports = EventSource;
global.EventSource = EventSource;
})(this);

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display.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>Joe&apos;s Web-Clipboard</title>
</head>
<style>
body {
font-family:Verdana,sans-serif;
}
span.label {
float:left;
width:100px;
}
input.url {
width:350px;
border:1px solid;
}
span#pnlConnectionState {
font-size:10px;
position:fixed;
right:0;
border:1px solid;
padding:5px;
text-align:center;
background:#EEEEEE;
margin-right:10px;
}
div.circle {
position:relative;
left:40%;
width: 15px;
height: 15px;
border-radius: 50%;
}
textarea#taValue {
width:95%;
display:block;
max-width:95%;
line-height:1.5;
padding:15px 15px 30px;
border-radius:3px;
border:1px solid #F7E98D;
font:13px Tahoma, cursive;
transition:box-shadow 0.5s ease;
box-shadow:0 4px 6px rgba(0,0,0,0.1);
font-smoothing:subpixel-antialiased;
background:linear-gradient(#F9EFAF, #F7E98D);
background:-o-linear-gradient(#F9EFAF, #F7E98D);
background:-ms-linear-gradient(#F9EFAF, #F7E98D);
background:-moz-linear-gradient(#F9EFAF, #F7E98D);
background:-webkit-linear-gradient(#F9EFAF, #F7E98D);
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="EventSource.js"></script> <!-- polyfill for IE -->
<script src="autosize.min.js"></script>
<script>
var webclip = (function () {
"use strict";
var source;
var lastTimeStamp;
var oldContent;
function loadData(id) {
$.get("raw/" + id, function (data) {
$("#lbNew").hide();
$("#taValue").val(data);
oldContent=data;
enableDisableButtons();
autosize($('#taValue'));
}).fail(function () {
$("#lbNew").show();
});
}
function startEventStream() {
source = new EventSource('events/' + $("#tbId").val());
source.addEventListener('message', function (event) {
console.log(event.data);
var data = JSON.parse(event.data);
if (data.timeStamp !== lastTimeStamp) {
if (0 !== lastTimeStamp) {
console.log("dirty - reloading");
loadData($("#tbId").val());
}
lastTimeStamp = data.timeStamp;
}
}, false);
source.addEventListener('open', function (e) {
console.log('> Connection was opened', e);
}, false);
source.addEventListener('error', function (e) {
if (e.eventPhase === 2) { //EventSource.CLOSED
console.log('> Connection was closed [ERR]');
}
console.log('> Connection error', e);
}, false);
}
function closeEventStream() {
console.log('> Closing EventStream');
try {
source.close();
}finally{}
}
function monitorConnectionState() {
if (source.readyState === 1) {
$("#icoStateConnected").show();
$("#icoStateDisconnected").hide();
} else {
$("#icoStateConnected").hide();
$("#icoStateDisconnected").show();
}
}
function saveData(id) {
closeEventStream();
$.post("save/" + id, {
data: $("#taValue").val()
}, function (data) {
$("#lbNew").hide();
console.log("AfterSave", data);
var jData = JSON.parse(data);
lastTimeStamp = jData.timeStamp;
oldContent=$("#taValue").val();
manageDirtyFlag();
startEventStream();
}).fail(function(xhr,textStatus,errorThrown){
console.log("ERROOOR",xhr,textStatus,errorThrown);
closeEventStream();
startEventStream();
});
}
function enableDisableButtons() {
if ($("#tbId").val() === "") {
$("#btnLoad").prop('disabled', true);
$("#btnSave").prop('disabled', true);
} else {
$("#btnLoad").prop('disabled', false);
if (!isContentChanged()){
$("#btnSave").prop('disabled', true);
$("#flgIsDirty").hide();
} else {
$("#btnSave").prop('disabled', false);
$("#flgIsDirty").show();
}
}
}
function manageDirtyFlag(){
enableDisableButtons();
}
function isContentChanged(){
if (oldContent !== $("#taValue").val()) {
return true;
} else {
return false;
}
}
$(document).ready(function () {
$("#tbId").val(location.href.substr(location.href.lastIndexOf('/') + 1));
$("#tbURLEdit").val($(location).attr("href"));
$("#tbURLRaw").val($(location).attr("href").replace("/wc/", "/wc/raw/"));
loadData($("#tbId").val());
lastTimeStamp = 0;
startEventStream();
window.setInterval(monitorConnectionState,1000);
});
return {
saveData: saveData,
enableDisableButtons: enableDisableButtons,
manageDirtyFlag: manageDirtyFlag
};
}());
</script>
<body>
<span style='font-size:40px'><span style='color:#777777'>Web</span>-<span style='color:#FF0000'>Clipboard</span></span><span style='font-size:14px'> by <a href='mailto:joe@netsquat.com'>joe@netsquat.com</a></span>
<span id='pnlConnectionState'>
Connection
<hr/>
<div id='icoStateConnected' class='circle' style='background:#00FF00;display:none'></div>
<div id='icoStateDisconnected' class='circle' style='background:#FF0000;display:none'></div>
</span>
<hr />
<input id='tbId' onchange='webclip.enableDisableButtons();' onkeyup='webclip.enableDisableButtons();' placeholder="Clipboard-name" style='border:1px solid'/>
<span id='lbNew' style='display:none'>[NEW]</span>
<button id='btnLoad' onclick='window.location.replace($("#tbId").val());'>Load</button>
<button id='btnSave' onclick='webclip.saveData($("#tbId").val());'>Save<span style='display:none' id='flgIsDirty'>*</span></button>
<button style='font-weight:bold;color:#FF0000' onClick='$(".moreToggle").toggle();'><span class='moreToggle' id='darr'>&darr;</span><span class='moreToggle' style='display:none' id='uarr'>&uarr;</span></button>
<br/>
<div id='pnlDetails' class='moreToggle' style='display:none'>
<span class='label'>Edit-URL</span> <input id='tbURLEdit' class='url' style='background-color:#CCCCCC' readonly='readonly'/><br/>
<span class='label'>Raw-URL</span> <input id='tbURLRaw' class='url' style='background-color:#CCCCCC' readonly='readonly'/>
</div>
<hr />
<textarea style='width:100%;font-family:courier,monospace' onkeyup='webclip.manageDirtyFlag();' onblur='webclip.manageDirtyFlag();' rows="20" id='taValue'>
</textarea>
<hr/>
$Revision: 15 $ -- $Date: 2016-02-07 12:09:18 -0600 (Sun, 07 Feb 2016) $
</body>
</html>

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install.txt Normal file
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put files into webserver-directory.
install nodejs package
install nodejs-legacy package
install npm package
[sudo] npm -g install forever
npm install autosize
ln -s node_modules/autosize/dist/autosize.min.js
copy files to some directory (/var/local/nodejs/wc/) and make sure permissions are good
in the directory get the Q-library for promises:
cd /var/loca/nodejs/wc && npm install q
configure a process to keep running node.js with the server.js:
---------------------------------------------------------------
[edit] /etc/rd.local:
su - <user> -c "cd /var/local/nodejs/wc; /usr/local/bin/forever start server.js"
Configure Lighttpd:
-------------------
cd /etc/lighttps/conf-enabled
ln -s ../conf-available/10-proxy.conf
add to 10-proxy.conf:
$HTTP["url"] =~ "^/wc/.*$" {
proxy.server = ( "" =>
(( "host" => "127.0.0.1", "port" => 8000 ))
)
}
re-start lighttpd

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package.json Normal file
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{
"name": "webclip",
"version": "1.0.0",
"description": "Web-Clipboard",
"main": "EventSource.js",
"directories": {
"doc": "docs"
},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "node server.js"
},
"author": "j.tretter@gmail.com",
"license": "ISC",
"dependencies": {
"q": "^1.4.1",
"querystring": "^0.2.0"
}
}

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server.js Normal file
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// $Revision: 16 $ -- $Date: 2016-02-08 15:14:12 -0600 (Mon, 08 Feb 2016) $
var http = require('http');
var sys = require('sys');
var fs = require('fs');
var moniFilename = 'abc';
var querystring = require('querystring');
var q = require('q');
var deferredAllDone;
http.createServer(function(req, res) {
//debugHeaders(req);
deferredAllDone = q.defer();
deferredAllDone.promise.done(function(pos) {
res.end();
console.log("Response END. [" + pos + "]");
});
if (req.headers.accept && req.headers.accept === 'text/event-stream') {
var arrMatches;
arrMatches = req.url.match(new RegExp(/\/events\/(.*)$/));
if (arrMatches) {
moniFilename = arrMatches[1];
console.log("Monitoring:" + moniFilename);
sendSSE(req, res);
} else {
res.writeHead(404);
deferredAllDone.resolve("404");
}
} else {
console.log("RCV-HTML");
res.writeHead(200, { 'Content-Type': 'text/html', 'Cache-Control': 'no-cache' });
arrMatches = req.url.match(new RegExp(/\/(save|raw)\/(.*)$/));
console.log("Matches", arrMatches);
if ((arrMatches) && (arrMatches.length === 3)) {
var func = arrMatches[1];
moniFilename = arrMatches[2];
if ("save" === func) {
console.log("SAVE-Data");
//sys.puts(sys.inspect(req));
var fullBody = '';
req.on('data', function(chunk) {
// append the current chunk of data to the fullBody variable
fullBody += chunk.toString();
});
//req.on('end', (function(res) {
req.on('end', function() {
var decodedBody = querystring.parse(fullBody);
//sys.puts(sys.inspect(decodedBody));
fs.writeFile(__dirname + "/docs/" + moniFilename, decodedBody.data, function(err) {
if (err) {
res.write('ERROR : "' + err + '"');
deferredAllDone.resolve("OnEndERR");
console.log(err);
} else {
fs.stat(__dirname + "/docs/" + moniFilename, function(err, stats) {
if (stats) {
console.log('deb' + stats.mtime);
res.write(constructJSON("Saved", stats.mtime));
}
deferredAllDone.resolve("OnEndSaved");
});
}
});
});
//}(res)));
} else if ("raw" === func) {
console.log("RAW");
try {
res.write(fs.readFileSync(__dirname + '/docs/' + moniFilename));
} catch (e) {
res.writeHead(404, { 'Content-Type': 'text/html' });
console.log("RAW - FAILED");
}
deferredAllDone.resolve("OnRaw");
}
} else {
var reqFile=req.url.replace("/wc/","");
console.log("Orig Requested File " + reqFile );
if ((reqFile!=='EventSource.js') && (reqFile!=='autosize.min.js') ) {
reqFile='display.html'
}
console.log("Requested File " + reqFile );
var contentType="text/html";
if (reqFile.match(/\.css/gi)) {
contentType="text/css";
}
if (reqFile.match(/\.js/gi)) {
contentType="application/javascript";
}
var filePath = __dirname + '/' + reqFile;
console.log("Full path " + filePath + " [" + contentType + "]" );
try {
var stat = fs.statSync(filePath);
var readStream = fs.createReadStream(filePath);
res.writeHead(200, {"Content-Type":contentType});
readStream.pipe(res); // this will do a res.end() by its own.
} catch (ex) {
res.writeHead(404,{"Content-Type":"text/html"});
res.write("Not found: " + reqFile );
deferredAllDone.resolve("OnDisplay");
console.log ("Not found: " + reqFile, ex);
}
}
}
}).listen(8001,'127.0.0.1');
// Send the server side event - consider that this response never ends, so no res.end() is called whatsowever!
function sendSSE(req, res) {
var theClient=req.socket.remoteAddress + ":" + req.socket.remotePort;
res.writeHead(200, {
'Content-Type': 'text/event-stream',
'Cache-Control': 'no-cache',
'Connection': 'keep-alive'
});
var id = (new Date()).toLocaleTimeString();
fs.stat(__dirname + "/docs/" + moniFilename, function(err, stats) {
if (stats) {
console.log('deb' + stats.mtime);
res.write(constructSSE("Modified", stats.mtime));
}
});
// Watching directory for changes
fs.watch(__dirname + '/docs/', function(event, filename) {
console.log('event is: ' + event);
if (filename) {
console.log('filename provided: ' + filename);
console.log("Monitoring:" + moniFilename);
if (moniFilename === filename) {
fs.stat(__dirname + "/docs/" + filename, function(err, stats) {
console.log('deb 2 ' +theClient + " - " + stats.mtime);
res.write(constructSSE("Modified", stats.mtime));
});
}
} else {
console.log('filename not provided');
}
});
}
// the SSE requires a "data" element
function constructSSE(type, timeStamp) {
var retVal = "data: " + constructJSON(type, timeStamp) + "\n\n";
console.log('MESSAGE-DEBUG-L: ' + type + " _ " + timeStamp);
return (retVal);
}
// just the JSON of the data
function constructJSON(type, timeStamp) {
var retVal = '{"type": "' + type + '",';
retVal += ('"timeStamp": "' + timeStamp + '"}');
return (retVal);
}
function debugHeaders(req) {
sys.puts('URL: ' + req.url);
for (var key in req.headers) {
sys.puts(key + ': ' + req.headers[key]);
}
sys.puts('\n\n');
}