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refactored www

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pull/10/head
Falk Werner 6 years ago
parent ef10bd7ace
commit 8e4d4868f4
7 changed files with 295 additions and 175 deletions
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8
src/app/www/index.html
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@ -2,10 +2,12 @@
<head>
<title>LWS Example</title>
<meta charset='UTF-8' />
<script type='text/javascript' src='js/connection.js'></script>
<script type='text/javascript' src='js/connection_view.js'></script>
<script type='text/javascript' src='js/filesystem.js'></script>
<script type='text/javascript' src='js/filesystem_handler.js'></script>
<script type='text/javascript' src='js/startup.js'></script>
</head>
<body>
<textarea id='content'></textarea>
<input id='sendButton' type='button' value='send' />
<script nonce='42' type='text/javascript' src='script.js'></script>
</body>
</html>

36
src/app/www/js/connection.js
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class Connection {
constructor() {
this.ws = null;
this.isConnected = false;
this.onopen = () => {};
this.onclose = () => {};
this.onmessage = () => {};
}
connectTo(url) {
if (this.ws) { this.close(); }
this.ws = new WebSocket(url, 'fs');
this.ws.onopen = () => {
this.isConnected = true;
this.onopen()
};
this.ws.onclose = () => {
this.isConnected = false;
this.onclose();
};
this.ws.onmessage = (message) => {
this.onmessage(message);
};
}
send(message) {
this.ws.send(message);
}
close() {
this.ws.close();
}
}

42
src/app/www/js/connection_view.js
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class ConnectionView {
constructor(connection) {
this.connection = connection;
this.connection.onclose = () => { this.onConnectionClosed(); };
this.connection.onopen = () => { this.onConnectionOpened(); };
this.element = document.createElement('div');
let urlLabel = document.createElement('span');
urlLabel.textContent = 'URL:';
this.element.appendChild(urlLabel);
this.urlTextbox = document.createElement('input');
this.urlTextbox.type = 'text';
this.urlTextbox.value = window.location.href.replace(/^http/, "ws");
this.element.appendChild(this.urlTextbox);
this.connectButton = document.createElement('input');
this.connectButton.type = 'button';
this.connectButton.value = 'connect';
this.connectButton.addEventListener('click', () => { this.onConnectButtonClicked(); });
this.element.appendChild(this.connectButton);
}
onConnectButtonClicked() {
if (!this.connection.isConnected) {
let url = this.urlTextbox.value;
this.connection.connectTo(url);
}
else {
this.connection.close();
}
}
onConnectionOpened() {
this.connectButton.value = 'disconnect';
}
onConnectionClosed() {
this.connectButton.value = 'connect';
}
}

98
src/app/www/js/filesystem.js
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class FileSystem {
static get GOOD() { return 0; }
static get BAD() { return 1; }
static get BAD_NOTIMPLEMENTED() { return 2; }
static get BAD_TIMEOUT() { return 3; }
static get BAD_FORMAT() { return 4; }
static get BAD_NOENTRY() { return 101; }
static get BAD_NOACCESS() { return 102; }
static get O_ACCMODE() { return 0x003; }
static get O_RDONLY() { return 0x000; }
static get O_WRONLY() { return 0x001; }
static get O_RDWR() { return 0x002; }
static get O_CREAT() { return 0x040; }
static get O_EXCL() { return 0x080; }
static get O_TRUNK() { return 0x200; }
static get O_APPEND() { return 0x400; }
constructor(root) {
this.root = root;
}
_getEntry(path) {
let curItem = this.root;
for(let item of path.split('/')) {
if ('' !== item) {
curItem = curItem.entries && curItem.entries[item];
if (!curItem) {
return null;
}
}
}
return curItem;
}
getattr(path) {
let entry = this._getEntry(path);
if (entry) {
return {
mode: entry.mode || parseInt("755", 8),
type: entry.type || 'file',
size: entry.size || (entry.contents && entry.contents.length) || 0,
atime: entry.atime || 0,
mtime: entry.mtime || 0,
ctime: entry.ctime || 0
};
}
else {
return FilesSystem.BAD_NOENTRY;
}
}
readdir(path) {
let result = FileSystem.BAD_NOENTRY;
let entry = this._getEntry(path);
if ((entry) && ("dir" === entry.type)) {
result = [".", ".."];
for(let subdir of Object.keys(entry.entries)) {
result.push(subdir);
}
}
return result;
}
open(path, mode) {
let result = FileSystem.BAD_NOENTRY;
let entry = this._getEntry(path);
if (entry.type == "file") {
result = ((mode & FileSystem.O_ACCMODE) == FileSystem.O_RDONLY) ? true : FileSystem.BAD_NOACCESS;
}
return result;
}
read(path, offset, length) {
let result = FileSystem.BAD_NOENTRY;
let entry = this._getEntry(path);
if (entry.type == "file") {
let end = Math.min(offset + length, entry.contents.length);
let data = (offset < entry.contents.length) ? entry.contents.substring(offset, end) : "";
result = {
data: data,
format: "identity",
count: data.length
};
}
return result;
}
}

53
src/app/www/js/filesystem_handler.js
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class FileSystemHandler {
constructor(filesystem, connection) {
this._fs = filesystem;
this._connection = connection;
this._connection.onmessage = (message) => {
this._onmessage(message);
};
}
_onmessage(message) {
try {
let request = JSON.parse(message.data);
let result = -42;
let response;
console.log(request);
if (("string" === typeof(request.method)) &&
("number" === typeof(request.id)) &&
(request.params)) {
switch(request.method)
{
case "getattr":
result = this._fs.getattr(request.params[0]);
break;
case "readdir":
result = this._fs.readdir(request.params[0]);
break;
case "open":
result = this._fs.open(request.params[0], request.params[1]);
break;
case "read":
result = this._fs.read(request.params[0], request.params[1], request.params[2]);
break;
default:
break;
}
if ("number" !== typeof(result)) {
response = {result: result, id: request.id};
}
else {
response = {error: {code: result}, id: request.id};
}
console.log(response);
this._connection.send(JSON.stringify(response));
}
}
catch (ex) { console.log(ex, message); }
};
}

61
src/app/www/js/startup.js
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function onmessage(message) {
try {
let request = JSON.parse(message.data);
let result = -42;
let response;
console.log(request);
if (("string" === typeof(request.method)) &&
("number" === typeof(request.id)) &&
(request.params)) {
switch(request.method)
{
case "getattr":
result = fs.getattr(request.params[0]);
break;
case "readdir":
result = fs.readdir(request.params[0]);
break;
case "open":
result = fs.open(request.params[0], request.params[1]);
break;
case "read":
result = fs.read(request.params[0], request.params[1], request.params[2]);
break;
default:
break;
}
if ("number" !== typeof(result)) {
response = {result: result, id: request.id};
}
else {
response = {error: {code: result}, id: request.id};
}
console.log(response);
ws.send(JSON.stringify(response));
}
}
catch (ex) { console.log(ex, message); }
};
function startup() {
let connection = new Connection();
let connectionView = new ConnectionView(connection);
let body = document.querySelector("body");
body.appendChild(connectionView.element);
let fs = new FileSystem({
mode: 0755,
type: "dir",
entries: {
"hello": { mode: 0755, type: "file", /* size: 10 , */contents: "Hello, World!"}
}
});
let handler = new FileSystemHandler(fs, connection);
}
window.onload = startup;

172
src/app/www/script.js
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@ -1,172 +0,0 @@
function startup()
{
var FileSystem = function(root) {
this.root = root;
};
FileSystem.GOOD = 0;
FileSystem.BAD = 1;
FileSystem.BAD_NOTIMPLEMENTED = 2;
FileSystem.BAD_TIMEOUT = 3;
FileSystem.BAD_FORMAT = 4;
FileSystem.BAD_NOENTRY = 101;
FileSystem.BAD_NOACCESS = 102;
FileSystem.O_ACCMODE = 00003;
FileSystem.O_RDONLY = 00000;
FileSystem.O_WRONLY = 00001;
FileSystem.O_RDWR = 00002;
FileSystem.O_CREAT = 00100;
FileSystem.O_EXCL = 00200;
FileSystem.O_TRUNK = 01000;
FileSystem.O_APPEND = 02000;
FileSystem.prototype.getEntry = function(path) {
var items = path.split('/');
var curItem = this.root;
var item;
var i, len;
for(i = 0, len = items.length; curItem && (i < len); i++) {
item = items[i];
if ("" !== item) {
curItem = curItem.entries && curItem.entries[item];
}
}
return curItem;
}
FileSystem.prototype.getattr = function(path) {
var entry = this.getEntry(path);
if (entry) {
return {
mode: entry.mode || 0755,
type: entry.type || 'file',
size: entry.size || (entry.contents && entry.contents.length) || 0,
atime: entry.atime || 0,
mtime: entry.mtime || 0,
ctime: entry.ctime || 0
};
}
else {
return FileSystem.BAD_NOENTRY;
}
};
FileSystem.prototype.readdir = function(path) {
var result, entry, subdir, i, len;
entry = this.getEntry(path);
if ((entry) && (entry.type == "dir")) {
result = [".", ".."];
for(subdir in entry.entries) {
if (entry.entries.hasOwnProperty(subdir)) {
result.push(subdir);
}
}
}
else {
result = FileSystem.BAD_NOENTRY;
}
return result;
};
FileSystem.prototype.open = function(path, mode) {
var result = FileSystem.BAD_NOENTRY;
var entry = this.getEntry(path);
if (entry.type == "file") {
result = ((mode & FileSystem.O_ACCMODE) == FileSystem.O_RDONLY) ? true : FileSystem.BAD_NOACCESS;
}
return result;
};
FileSystem.prototype.read = function(path, offset, length) {
var result = FileSystem.BAD_NOENTRY;
var entry = this.getEntry(path);
if (entry.type == "file") {
var end = Math.min(offset + length, entry.contents.length);
var data = (offset < entry.contents.length) ? entry.contents.substring(offset, end) : "";
result = {
data: data,
format: "identity",
count: data.length
};
}
return result;
};
var fs = new FileSystem({
mode: 0755,
type: "dir",
entries: {
"hello": { mode: 0755, type: "file", /* size: 10 , */contents: "Hello, World!"}
}
});
var ws = new WebSocket('ws://localhost:4711/', 'fs');
ws.onopen = function() {
console.log('open');
};
ws.onclose = function() {
console.log('close');
};
ws.onmessage = function(message) {
try {
var request = JSON.parse(message.data);
var result = -42;
var response;
console.log(request);
if (("string" === typeof(request.method)) &&
("number" === typeof(request.id)) &&
(request.params)) {
switch(request.method)
{
case "getattr":
result = fs.getattr(request.params[0]);
break;
case "readdir":
result = fs.readdir(request.params[0]);
break;
case "open":
result = fs.open(request.params[0], request.params[1]);
break;
case "read":
result = fs.read(request.params[0], request.params[1], request.params[2]);
break;
default:
break;
}
if ("number" !== typeof(result)) {
response = {result: result, id: request.id};
}
else {
response = {error: {code: result}, id: request.id};
}
console.log(response);
ws.send(JSON.stringify(response));
}
}
catch (ex) { console.log(ex, message); }
};
var sendButton = document.getElementById('sendButton');
sendButton.addEventListener('click', function() {
var content = document.getElementById('content').value;
ws.send(content);
console.log(content);
});
}
document.onload=startup();
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