676 lines
20 KiB
JavaScript
676 lines
20 KiB
JavaScript
|
/**
|
||
|
|
* EventSource
|
||
|
|
* https://github.com/Yaffle/EventSource
|
||
|
|
*
|
||
|
|
* Released under the MIT License (MIT)
|
||
|
|
* https://github.com/Yaffle/EventSource/blob/master/LICENSE.md
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*jslint indent: 2, vars: true, plusplus: true */
|
||
|
|
/*global setTimeout, clearTimeout */
|
||
|
|
|
||
|
|
(function (global) {
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
var setTimeout = global.setTimeout;
|
||
|
|
var clearTimeout = global.clearTimeout;
|
||
|
|
var XMLHttpRequest = global.XMLHttpRequest;
|
||
|
|
var XDomainRequest = global.XDomainRequest;
|
||
|
|
var NativeEventSource = global.EventSource;
|
||
|
|
var document = global.document;
|
||
|
|
|
||
|
|
if (Object.create == null) {
|
||
|
|
Object.create = function (C) {
|
||
|
|
function F(){}
|
||
|
|
F.prototype = C;
|
||
|
|
return new F();
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
var k = function () {
|
||
|
|
};
|
||
|
|
|
||
|
|
function XHRWrapper(xhr) {
|
||
|
|
this.withCredentials = false;
|
||
|
|
this.responseType = "";
|
||
|
|
this.readyState = 0;
|
||
|
|
this.status = 0;
|
||
|
|
this.statusText = "";
|
||
|
|
this.responseText = "";
|
||
|
|
this.onprogress = k;
|
||
|
|
this.onreadystatechange = k;
|
||
|
|
this._contentType = "";
|
||
|
|
this._xhr = xhr;
|
||
|
|
this._sendTimeout = 0;
|
||
|
|
this._abort = k;
|
||
|
|
}
|
||
|
|
|
||
|
|
XHRWrapper.prototype.open = function (method, url) {
|
||
|
|
this._abort(true);
|
||
|
|
|
||
|
|
var that = this;
|
||
|
|
var xhr = this._xhr;
|
||
|
|
var state = 1;
|
||
|
|
var timeout = 0;
|
||
|
|
|
||
|
|
this._abort = function (silent) {
|
||
|
|
if (that._sendTimeout !== 0) {
|
||
|
|
clearTimeout(that._sendTimeout);
|
||
|
|
that._sendTimeout = 0;
|
||
|
|
}
|
||
|
|
if (state === 1 || state === 2 || state === 3) {
|
||
|
|
state = 4;
|
||
|
|
xhr.onload = k;
|
||
|
|
xhr.onerror = k;
|
||
|
|
xhr.onabort = k;
|
||
|
|
xhr.onprogress = k;
|
||
|
|
xhr.onreadystatechange = k;
|
||
|
|
// IE 8 - 9: XDomainRequest#abort() does not fire any event
|
||
|
|
// Opera < 10: XMLHttpRequest#abort() does not fire any event
|
||
|
|
xhr.abort();
|
||
|
|
if (timeout !== 0) {
|
||
|
|
clearTimeout(timeout);
|
||
|
|
timeout = 0;
|
||
|
|
}
|
||
|
|
if (!silent) {
|
||
|
|
that.readyState = 4;
|
||
|
|
that.onreadystatechange();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
state = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
var onStart = function () {
|
||
|
|
if (state === 1) {
|
||
|
|
//state = 2;
|
||
|
|
var status = 0;
|
||
|
|
var statusText = "";
|
||
|
|
var contentType = undefined;
|
||
|
|
if (!("contentType" in xhr)) {
|
||
|
|
try {
|
||
|
|
status = xhr.status;
|
||
|
|
statusText = xhr.statusText;
|
||
|
|
contentType = xhr.getResponseHeader("Content-Type");
|
||
|
|
} catch (error) {
|
||
|
|
// IE < 10 throws exception for `xhr.status` when xhr.readyState === 2 || xhr.readyState === 3
|
||
|
|
// Opera < 11 throws exception for `xhr.status` when xhr.readyState === 2
|
||
|
|
// https://bugs.webkit.org/show_bug.cgi?id=29121
|
||
|
|
status = 0;
|
||
|
|
statusText = "";
|
||
|
|
contentType = undefined;
|
||
|
|
// Firefox < 14, Chrome ?, Safari ?
|
||
|
|
// https://bugs.webkit.org/show_bug.cgi?id=29658
|
||
|
|
// https://bugs.webkit.org/show_bug.cgi?id=77854
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
status = 200;
|
||
|
|
statusText = "OK";
|
||
|
|
contentType = xhr.contentType;
|
||
|
|
}
|
||
|
|
if (status !== 0) {
|
||
|
|
state = 2;
|
||
|
|
that.readyState = 2;
|
||
|
|
that.status = status;
|
||
|
|
that.statusText = statusText;
|
||
|
|
that._contentType = contentType;
|
||
|
|
that.onreadystatechange();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
var onProgress = function () {
|
||
|
|
onStart();
|
||
|
|
if (state === 2 || state === 3) {
|
||
|
|
state = 3;
|
||
|
|
var responseText = "";
|
||
|
|
try {
|
||
|
|
responseText = xhr.responseText;
|
||
|
|
} catch (error) {
|
||
|
|
// IE 8 - 9 with XMLHttpRequest
|
||
|
|
}
|
||
|
|
that.readyState = 3;
|
||
|
|
that.responseText = responseText;
|
||
|
|
that.onprogress();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
var onFinish = function () {
|
||
|
|
// Firefox 52 fires "readystatechange" (xhr.readyState === 4) without final "readystatechange" (xhr.readyState === 3)
|
||
|
|
// IE 8 fires "onload" without "onprogress"
|
||
|
|
onProgress();
|
||
|
|
if (state === 1 || state === 2 || state === 3) {
|
||
|
|
state = 4;
|
||
|
|
if (timeout !== 0) {
|
||
|
|
clearTimeout(timeout);
|
||
|
|
timeout = 0;
|
||
|
|
}
|
||
|
|
that.readyState = 4;
|
||
|
|
that.onreadystatechange();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
var onReadyStateChange = function () {
|
||
|
|
if (xhr != undefined) { // Opera 12
|
||
|
|
if (xhr.readyState === 4) {
|
||
|
|
onFinish();
|
||
|
|
} else if (xhr.readyState === 3) {
|
||
|
|
onProgress();
|
||
|
|
} else if (xhr.readyState === 2) {
|
||
|
|
onStart();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
var onTimeout = function () {
|
||
|
|
timeout = setTimeout(function () {
|
||
|
|
onTimeout();
|
||
|
|
}, 500);
|
||
|
|
if (xhr.readyState === 3) {
|
||
|
|
onProgress();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// XDomainRequest#abort removes onprogress, onerror, onload
|
||
|
|
xhr.onload = onFinish;
|
||
|
|
xhr.onerror = onFinish;
|
||
|
|
// improper fix to match Firefox behaviour, but it is better than just ignore abort
|
||
|
|
// see https://bugzilla.mozilla.org/show_bug.cgi?id=768596
|
||
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=880200
|
||
|
|
// https://code.google.com/p/chromium/issues/detail?id=153570
|
||
|
|
// IE 8 fires "onload" without "onprogress
|
||
|
|
xhr.onabort = onFinish;
|
||
|
|
|
||
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=736723
|
||
|
|
if (!("sendAsBinary" in XMLHttpRequest.prototype) && !("mozAnon" in XMLHttpRequest.prototype)) {
|
||
|
|
xhr.onprogress = onProgress;
|
||
|
|
}
|
||
|
|
|
||
|
|
// IE 8 - 9 (XMLHTTPRequest)
|
||
|
|
// Opera < 12
|
||
|
|
// Firefox < 3.5
|
||
|
|
// Firefox 3.5 - 3.6 - ? < 9.0
|
||
|
|
// onprogress is not fired sometimes or delayed
|
||
|
|
// see also #64
|
||
|
|
xhr.onreadystatechange = onReadyStateChange;
|
||
|
|
|
||
|
|
if ("contentType" in xhr) {
|
||
|
|
url += (url.indexOf("?", 0) === -1 ? "?" : "&") + "padding=true";
|
||
|
|
}
|
||
|
|
xhr.open(method, url, true);
|
||
|
|
|
||
|
|
if ("readyState" in xhr) {
|
||
|
|
// workaround for Opera 12 issue with "progress" events
|
||
|
|
// #91
|
||
|
|
timeout = setTimeout(function () {
|
||
|
|
onTimeout();
|
||
|
|
}, 0);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
XHRWrapper.prototype.abort = function () {
|
||
|
|
this._abort(false);
|
||
|
|
};
|
||
|
|
XHRWrapper.prototype.getResponseHeader = function (name) {
|
||
|
|
return this._contentType;
|
||
|
|
};
|
||
|
|
XHRWrapper.prototype.setRequestHeader = function (name, value) {
|
||
|
|
var xhr = this._xhr;
|
||
|
|
if ("setRequestHeader" in xhr) {
|
||
|
|
xhr.setRequestHeader(name, value);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
XHRWrapper.prototype.send = function () {
|
||
|
|
// loading indicator in Safari < ? (6), Chrome < 14, Firefox
|
||
|
|
if (!("ontimeout" in XMLHttpRequest.prototype) &&
|
||
|
|
document != undefined &&
|
||
|
|
document.readyState != undefined &&
|
||
|
|
document.readyState !== "complete") {
|
||
|
|
var that = this;
|
||
|
|
that._sendTimeout = setTimeout(function () {
|
||
|
|
that._sendTimeout = 0;
|
||
|
|
that.send();
|
||
|
|
}, 4);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
var xhr = this._xhr;
|
||
|
|
// withCredentials should be set after "open" for Safari and Chrome (< 19 ?)
|
||
|
|
xhr.withCredentials = this.withCredentials;
|
||
|
|
xhr.responseType = this.responseType;
|
||
|
|
try {
|
||
|
|
// xhr.send(); throws "Not enough arguments" in Firefox 3.0
|
||
|
|
xhr.send(undefined);
|
||
|
|
} catch (error1) {
|
||
|
|
// Safari 5.1.7, Opera 12
|
||
|
|
throw error1;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
function XHRTransport(xhr) {
|
||
|
|
this._xhr = new XHRWrapper(xhr);
|
||
|
|
}
|
||
|
|
|
||
|
|
XHRTransport.prototype.open = function (onStartCallback, onProgressCallback, onFinishCallback, url, withCredentials, headers) {
|
||
|
|
var xhr = this._xhr;
|
||
|
|
xhr.open("GET", url);
|
||
|
|
var offset = 0;
|
||
|
|
xhr.onprogress = function () {
|
||
|
|
var responseText = xhr.responseText;
|
||
|
|
var chunk = responseText.slice(offset);
|
||
|
|
offset += chunk.length;
|
||
|
|
onProgressCallback(chunk);
|
||
|
|
};
|
||
|
|
xhr.onreadystatechange = function () {
|
||
|
|
if (xhr.readyState === 2) {
|
||
|
|
var status = xhr.status;
|
||
|
|
var statusText = xhr.statusText;
|
||
|
|
var contentType = xhr.getResponseHeader("Content-Type");
|
||
|
|
onStartCallback(status, statusText, contentType);
|
||
|
|
} else if (xhr.readyState === 4) {
|
||
|
|
onFinishCallback();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
xhr.withCredentials = withCredentials;
|
||
|
|
xhr.responseType = "text";
|
||
|
|
for (var name in headers) {
|
||
|
|
if (Object.prototype.hasOwnProperty.call(headers, name)) {
|
||
|
|
xhr.setRequestHeader(name, headers[name]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
xhr.send();
|
||
|
|
};
|
||
|
|
|
||
|
|
XHRTransport.prototype.cancel = function () {
|
||
|
|
var xhr = this._xhr;
|
||
|
|
xhr.abort();
|
||
|
|
};
|
||
|
|
|
||
|
|
function EventTarget() {
|
||
|
|
this._listeners = Object.create(null);
|
||
|
|
}
|
||
|
|
|
||
|
|
function throwError(e) {
|
||
|
|
setTimeout(function () {
|
||
|
|
throw e;
|
||
|
|
}, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
EventTarget.prototype.dispatchEvent = function (event) {
|
||
|
|
event.target = this;
|
||
|
|
var typeListeners = this._listeners[event.type];
|
||
|
|
if (typeListeners != undefined) {
|
||
|
|
var length = typeListeners.length;
|
||
|
|
for (var i = 0; i < length; i += 1) {
|
||
|
|
var listener = typeListeners[i];
|
||
|
|
try {
|
||
|
|
if (typeof listener.handleEvent === "function") {
|
||
|
|
listener.handleEvent(event);
|
||
|
|
} else {
|
||
|
|
listener.call(this, event);
|
||
|
|
}
|
||
|
|
} catch (e) {
|
||
|
|
throwError(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
EventTarget.prototype.addEventListener = function (type, listener) {
|
||
|
|
type = String(type);
|
||
|
|
var listeners = this._listeners;
|
||
|
|
var typeListeners = listeners[type];
|
||
|
|
if (typeListeners == undefined) {
|
||
|
|
typeListeners = [];
|
||
|
|
listeners[type] = typeListeners;
|
||
|
|
}
|
||
|
|
var found = false;
|
||
|
|
for (var i = 0; i < typeListeners.length; i += 1) {
|
||
|
|
if (typeListeners[i] === listener) {
|
||
|
|
found = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!found) {
|
||
|
|
typeListeners.push(listener);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
EventTarget.prototype.removeEventListener = function (type, listener) {
|
||
|
|
type = String(type);
|
||
|
|
var listeners = this._listeners;
|
||
|
|
var typeListeners = listeners[type];
|
||
|
|
if (typeListeners != undefined) {
|
||
|
|
var filtered = [];
|
||
|
|
for (var i = 0; i < typeListeners.length; i += 1) {
|
||
|
|
if (typeListeners[i] !== listener) {
|
||
|
|
filtered.push(typeListeners[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (filtered.length === 0) {
|
||
|
|
delete listeners[type];
|
||
|
|
} else {
|
||
|
|
listeners[type] = filtered;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
function Event(type) {
|
||
|
|
this.type = type;
|
||
|
|
this.target = undefined;
|
||
|
|
}
|
||
|
|
|
||
|
|
function MessageEvent(type, options) {
|
||
|
|
Event.call(this, type);
|
||
|
|
this.data = options.data;
|
||
|
|
this.lastEventId = options.lastEventId;
|
||
|
|
}
|
||
|
|
|
||
|
|
MessageEvent.prototype = Object.create(Event.prototype);
|
||
|
|
|
||
|
|
var WAITING = -1;
|
||
|
|
var CONNECTING = 0;
|
||
|
|
var OPEN = 1;
|
||
|
|
var CLOSED = 2;
|
||
|
|
|
||
|
|
var AFTER_CR = -1;
|
||
|
|
var FIELD_START = 0;
|
||
|
|
var FIELD = 1;
|
||
|
|
var VALUE_START = 2;
|
||
|
|
var VALUE = 3;
|
||
|
|
|
||
|
|
var contentTypeRegExp = /^text\/event\-stream;?(\s*charset\=utf\-8)?$/i;
|
||
|
|
|
||
|
|
var MINIMUM_DURATION = 1000;
|
||
|
|
var MAXIMUM_DURATION = 18000000;
|
||
|
|
|
||
|
|
var parseDuration = function (value, def) {
|
||
|
|
var n = parseInt(value, 10);
|
||
|
|
if (n !== n) {
|
||
|
|
n = def;
|
||
|
|
}
|
||
|
|
return clampDuration(n);
|
||
|
|
};
|
||
|
|
var clampDuration = function (n) {
|
||
|
|
return Math.min(Math.max(n, MINIMUM_DURATION), MAXIMUM_DURATION);
|
||
|
|
};
|
||
|
|
|
||
|
|
var fire = function (that, f, event) {
|
||
|
|
try {
|
||
|
|
if (typeof f === "function") {
|
||
|
|
f.call(that, event);
|
||
|
|
}
|
||
|
|
} catch (e) {
|
||
|
|
throwError(e);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
function EventSourcePolyfill(url, options) {
|
||
|
|
EventTarget.call(this);
|
||
|
|
|
||
|
|
this.onopen = undefined;
|
||
|
|
this.onmessage = undefined;
|
||
|
|
this.onerror = undefined;
|
||
|
|
|
||
|
|
this.url = undefined;
|
||
|
|
this.readyState = undefined;
|
||
|
|
this.withCredentials = undefined;
|
||
|
|
|
||
|
|
this._close = undefined;
|
||
|
|
|
||
|
|
start(this, url, options);
|
||
|
|
}
|
||
|
|
|
||
|
|
function start(es, url, options) {
|
||
|
|
url = String(url);
|
||
|
|
var withCredentials = options != undefined && Boolean(options.withCredentials);
|
||
|
|
|
||
|
|
var initialRetry = clampDuration(1000);
|
||
|
|
var heartbeatTimeout = clampDuration(45000);
|
||
|
|
|
||
|
|
var lastEventId = "";
|
||
|
|
var retry = initialRetry;
|
||
|
|
var wasActivity = false;
|
||
|
|
var headers = options != undefined && options.headers != undefined ? JSON.parse(JSON.stringify(options.headers)) : undefined;
|
||
|
|
var CurrentTransport = options != undefined && options.Transport != undefined ? options.Transport : (XDomainRequest != undefined ? XDomainRequest : XMLHttpRequest);
|
||
|
|
var transport = new XHRTransport(new CurrentTransport());
|
||
|
|
var timeout = 0;
|
||
|
|
var currentState = WAITING;
|
||
|
|
var dataBuffer = "";
|
||
|
|
var lastEventIdBuffer = "";
|
||
|
|
var eventTypeBuffer = "";
|
||
|
|
|
||
|
|
var textBuffer = "";
|
||
|
|
var state = FIELD_START;
|
||
|
|
var fieldStart = 0;
|
||
|
|
var valueStart = 0;
|
||
|
|
|
||
|
|
var onStart = function (status, statusText, contentType) {
|
||
|
|
if (currentState === CONNECTING) {
|
||
|
|
if (status === 200 && contentType != undefined && contentTypeRegExp.test(contentType)) {
|
||
|
|
currentState = OPEN;
|
||
|
|
wasActivity = true;
|
||
|
|
retry = initialRetry;
|
||
|
|
es.readyState = OPEN;
|
||
|
|
var event = new Event("open");
|
||
|
|
es.dispatchEvent(event);
|
||
|
|
fire(es, es.onopen, event);
|
||
|
|
} else {
|
||
|
|
var message = "";
|
||
|
|
if (status !== 200) {
|
||
|
|
if (statusText) {
|
||
|
|
statusText = statusText.replace(/\s+/g, " ");
|
||
|
|
}
|
||
|
|
message = "EventSource's response has a status " + status + " " + statusText + " that is not 200. Aborting the connection.";
|
||
|
|
} else {
|
||
|
|
message = "EventSource's response has a Content-Type specifying an unsupported type: " + (contentType == undefined ? "-" : contentType.replace(/\s+/g, " ")) + ". Aborting the connection.";
|
||
|
|
}
|
||
|
|
throwError(new Error(message));
|
||
|
|
close();
|
||
|
|
var event = new Event("error");
|
||
|
|
es.dispatchEvent(event);
|
||
|
|
fire(es, es.onerror, event);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
var onProgress = function (textChunk) {
|
||
|
|
if (currentState === OPEN) {
|
||
|
|
var n = -1;
|
||
|
|
for (var i = 0; i < textChunk.length; i += 1) {
|
||
|
|
var c = textChunk.charCodeAt(i);
|
||
|
|
if (c === "\n".charCodeAt(0) || c === "\r".charCodeAt(0)) {
|
||
|
|
n = i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
var chunk = (n !== -1 ? textBuffer : "") + textChunk.slice(0, n + 1);
|
||
|
|
textBuffer = (n === -1 ? textBuffer : "") + textChunk.slice(n + 1);
|
||
|
|
if (chunk !== "") {
|
||
|
|
wasActivity = true;
|
||
|
|
}
|
||
|
|
for (var position = 0; position < chunk.length; position += 1) {
|
||
|
|
var c = chunk.charCodeAt(position);
|
||
|
|
if (state === AFTER_CR && c === "\n".charCodeAt(0)) {
|
||
|
|
state = FIELD_START;
|
||
|
|
} else {
|
||
|
|
if (state === AFTER_CR) {
|
||
|
|
state = FIELD_START;
|
||
|
|
}
|
||
|
|
if (c === "\r".charCodeAt(0) || c === "\n".charCodeAt(0)) {
|
||
|
|
if (state !== FIELD_START) {
|
||
|
|
if (state === FIELD) {
|
||
|
|
valueStart = position + 1;
|
||
|
|
}
|
||
|
|
var field = chunk.slice(fieldStart, valueStart - 1);
|
||
|
|
var value = chunk.slice(valueStart + (valueStart < position && chunk.charCodeAt(valueStart) === " ".charCodeAt(0) ? 1 : 0), position);
|
||
|
|
if (field === "data") {
|
||
|
|
dataBuffer += "\n";
|
||
|
|
dataBuffer += value;
|
||
|
|
} else if (field === "id") {
|
||
|
|
lastEventIdBuffer = value;
|
||
|
|
} else if (field === "event") {
|
||
|
|
eventTypeBuffer = value;
|
||
|
|
} else if (field === "retry") {
|
||
|
|
initialRetry = parseDuration(value, initialRetry);
|
||
|
|
retry = initialRetry;
|
||
|
|
} else if (field === "heartbeatTimeout") {
|
||
|
|
heartbeatTimeout = parseDuration(value, heartbeatTimeout);
|
||
|
|
if (timeout !== 0) {
|
||
|
|
clearTimeout(timeout);
|
||
|
|
timeout = setTimeout(function () {
|
||
|
|
onTimeout();
|
||
|
|
}, heartbeatTimeout);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (state === FIELD_START) {
|
||
|
|
if (dataBuffer !== "") {
|
||
|
|
lastEventId = lastEventIdBuffer;
|
||
|
|
if (eventTypeBuffer === "") {
|
||
|
|
eventTypeBuffer = "message";
|
||
|
|
}
|
||
|
|
var event = new MessageEvent(eventTypeBuffer, {
|
||
|
|
data: dataBuffer.slice(1),
|
||
|
|
lastEventId: lastEventIdBuffer
|
||
|
|
});
|
||
|
|
es.dispatchEvent(event);
|
||
|
|
if (eventTypeBuffer === "message") {
|
||
|
|
fire(es, es.onmessage, event);
|
||
|
|
}
|
||
|
|
if (currentState === CLOSED) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
dataBuffer = "";
|
||
|
|
eventTypeBuffer = "";
|
||
|
|
}
|
||
|
|
state = c === "\r".charCodeAt(0) ? AFTER_CR : FIELD_START;
|
||
|
|
} else {
|
||
|
|
if (state === FIELD_START) {
|
||
|
|
fieldStart = position;
|
||
|
|
state = FIELD;
|
||
|
|
}
|
||
|
|
if (state === FIELD) {
|
||
|
|
if (c === ":".charCodeAt(0)) {
|
||
|
|
valueStart = position + 1;
|
||
|
|
state = VALUE_START;
|
||
|
|
}
|
||
|
|
} else if (state === VALUE_START) {
|
||
|
|
state = VALUE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
var onFinish = function () {
|
||
|
|
if (currentState === OPEN || currentState === CONNECTING) {
|
||
|
|
currentState = WAITING;
|
||
|
|
if (timeout !== 0) {
|
||
|
|
clearTimeout(timeout);
|
||
|
|
timeout = 0;
|
||
|
|
}
|
||
|
|
timeout = setTimeout(function () {
|
||
|
|
onTimeout();
|
||
|
|
}, retry);
|
||
|
|
retry = clampDuration(Math.min(initialRetry * 16, retry * 2));
|
||
|
|
|
||
|
|
es.readyState = CONNECTING;
|
||
|
|
var event = new Event("error");
|
||
|
|
es.dispatchEvent(event);
|
||
|
|
fire(es, es.onerror, event);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
var close = function () {
|
||
|
|
currentState = CLOSED;
|
||
|
|
transport.cancel();
|
||
|
|
if (timeout !== 0) {
|
||
|
|
clearTimeout(timeout);
|
||
|
|
timeout = 0;
|
||
|
|
}
|
||
|
|
es.readyState = CLOSED;
|
||
|
|
};
|
||
|
|
|
||
|
|
var onTimeout = function () {
|
||
|
|
timeout = 0;
|
||
|
|
|
||
|
|
if (currentState !== WAITING) {
|
||
|
|
if (!wasActivity) {
|
||
|
|
throwError(new Error("No activity within " + heartbeatTimeout + " milliseconds. Reconnecting."));
|
||
|
|
transport.cancel();
|
||
|
|
} else {
|
||
|
|
wasActivity = false;
|
||
|
|
timeout = setTimeout(function () {
|
||
|
|
onTimeout();
|
||
|
|
}, heartbeatTimeout);
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
wasActivity = false;
|
||
|
|
timeout = setTimeout(function () {
|
||
|
|
onTimeout();
|
||
|
|
}, heartbeatTimeout);
|
||
|
|
|
||
|
|
currentState = CONNECTING;
|
||
|
|
dataBuffer = "";
|
||
|
|
eventTypeBuffer = "";
|
||
|
|
lastEventIdBuffer = lastEventId;
|
||
|
|
textBuffer = "";
|
||
|
|
fieldStart = 0;
|
||
|
|
valueStart = 0;
|
||
|
|
state = FIELD_START;
|
||
|
|
|
||
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=428916
|
||
|
|
// Request header field Last-Event-ID is not allowed by Access-Control-Allow-Headers.
|
||
|
|
var requestURL = url;
|
||
|
|
if (url.slice(0, 5) !== "data:" &&
|
||
|
|
url.slice(0, 5) !== "blob:") {
|
||
|
|
requestURL = url + (url.indexOf("?", 0) === -1 ? "?" : "&") + "lastEventId=" + encodeURIComponent(lastEventId);
|
||
|
|
}
|
||
|
|
var requestHeaders = {};
|
||
|
|
requestHeaders["Accept"] = "text/event-stream";
|
||
|
|
if (headers != undefined) {
|
||
|
|
for (var name in headers) {
|
||
|
|
if (Object.prototype.hasOwnProperty.call(headers, name)) {
|
||
|
|
requestHeaders[name] = headers[name];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
transport.open(onStart, onProgress, onFinish, requestURL, withCredentials, requestHeaders);
|
||
|
|
} catch (error) {
|
||
|
|
close();
|
||
|
|
throw error;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
es.url = url;
|
||
|
|
es.readyState = CONNECTING;
|
||
|
|
es.withCredentials = withCredentials;
|
||
|
|
es._close = close;
|
||
|
|
|
||
|
|
onTimeout();
|
||
|
|
}
|
||
|
|
|
||
|
|
EventSourcePolyfill.prototype = Object.create(EventTarget.prototype);
|
||
|
|
EventSourcePolyfill.prototype.CONNECTING = CONNECTING;
|
||
|
|
EventSourcePolyfill.prototype.OPEN = OPEN;
|
||
|
|
EventSourcePolyfill.prototype.CLOSED = CLOSED;
|
||
|
|
EventSourcePolyfill.prototype.close = function () {
|
||
|
|
this._close();
|
||
|
|
};
|
||
|
|
|
||
|
|
EventSourcePolyfill.CONNECTING = CONNECTING;
|
||
|
|
EventSourcePolyfill.OPEN = OPEN;
|
||
|
|
EventSourcePolyfill.CLOSED = CLOSED;
|
||
|
|
EventSourcePolyfill.prototype.withCredentials = undefined;
|
||
|
|
|
||
|
|
global.EventSourcePolyfill = EventSourcePolyfill;
|
||
|
|
global.NativeEventSource = NativeEventSource;
|
||
|
|
|
||
|
|
if (XMLHttpRequest != undefined && (NativeEventSource == undefined || !("withCredentials" in NativeEventSource.prototype))) {
|
||
|
|
// Why replace a native EventSource ?
|
||
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=444328
|
||
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=831392
|
||
|
|
// https://code.google.com/p/chromium/issues/detail?id=260144
|
||
|
|
// https://code.google.com/p/chromium/issues/detail?id=225654
|
||
|
|
// ...
|
||
|
|
global.EventSource = EventSourcePolyfill;
|
||
|
|
}
|
||
|
|
|
||
|
|
}(typeof window !== 'undefined' ? window : this));
|