139 lines
4.1 KiB
Plaintext
139 lines
4.1 KiB
Plaintext
function TextDecoder() {
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}
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TextDecoder.prototype.decode = function (octets) {
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var string = "";
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var i = 0;
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while (i < octets.length) {
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var octet = octets[i];
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var bytesNeeded = 0;
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var codePoint = 0;
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if (octet <= 0x7F) {
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bytesNeeded = 0;
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codePoint = octet & 0xFF;
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} else if (octet <= 0xDF) {
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bytesNeeded = 1;
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codePoint = octet & 0x1F;
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} else if (octet <= 0xEF) {
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bytesNeeded = 2;
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codePoint = octet & 0x0F;
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} else if (octet <= 0xF4) {
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bytesNeeded = 3;
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codePoint = octet & 0x07;
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}
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if (octets.length - i - bytesNeeded > 0) {
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var k = 0;
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while (k < bytesNeeded) {
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octet = octets[i + k + 1];
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codePoint = (codePoint << 6) | (octet & 0x3F);
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k += 1;
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}
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} else {
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codePoint = 0xFFFD;
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bytesNeeded = octets.length - i;
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}
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string += String.fromCodePoint(codePoint);
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i += bytesNeeded + 1;
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}
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return string
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};
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function FetchTransport(fetch, onStartCallback, onProgressCallback, onFinishCallback, thisArg) {
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this._internal = new FetchTransportInternal(fetch, onStartCallback, onProgressCallback, onFinishCallback, thisArg);
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}
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FetchTransport.prototype.open = function (url, withCredentials) {
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this._internal.open(url, withCredentials);
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};
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FetchTransport.prototype.cancel = function () {
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this._internal.cancel();
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};
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function FetchTransportInternal(fetch, onStartCallback, onProgressCallback, onFinishCallback, thisArg) {
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this.fetch = fetch;
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this.onStartCallback = onStartCallback;
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this.onProgressCallback = onProgressCallback;
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this.onFinishCallback = onFinishCallback;
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this.thisArg = thisArg;
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this.reader = undefined;
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this.lastRequestId = 0;
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this.octets = [];
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this.textDecoder = new TextDecoder();
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}
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FetchTransportInternal.prototype.read = function () {
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var that = this;
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return new Promise(function (resolve, reject) {
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var onRead = function () {
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if (result.done) {
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resolve(undefined);
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} else {
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var value = result.value;
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var n = 0;
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for (var i = 0; i < value.length; i += 1) {
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var c = value[i];
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if (c === "\n".charCodeAt(0) || c === "\r".charCodeAt(0)) {
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n = i + 1;
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}
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}
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var k = that.octets.length;
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for (var i = 0; i < n; i += 1) {
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that.octets[k + i] = value[i];
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}
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var chunk = "";
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if (n !== 0) {
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chunk = that.textDecoder.decode(that.octets);//String.fromCharCode.apply(undefined, that.octets);
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that.octets.length = 0;
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k = 0;
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}
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for (var i = n; i < value.length; i += 1) {
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that.octets[k + i - n] = value[i];
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}
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that.onProgressCallback.call(that.thisArg, chunk);
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that.reader.read().then(onRead)["catch"](reject);
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}
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};
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that.reader.read().then(onRead);
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});
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};
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FetchTransportInternal.prototype.open = function (url, withCredentials) {
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this.cancel();
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this.octets.length = 0;
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var that = this;
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var requestId = this.lastRequestId;
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this.fetch(url, {
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headers: {
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"Accept": "text/event-stream"
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},
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credentials: withCredentials ? "include" : "same-origin",
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cache: "no-store"
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}).then(function (response) {
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if (lastRequestId === this.lastRequestId) {
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that.reader = response.body.getReader();
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that.onStartCallback.call(that.thisArg, response.status, response.statusText, response.headers.get("Content-Type"));
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if (lastRequestId !== that.lastRequestId) {
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return undefined;
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}
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return that.read();
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}
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return undefined;
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}).then(function (error) {
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that.onFinishCallback.call(that.thisArg);
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if (error != undefined) {
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throw error;
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}
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})["catch"](function (error) {
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return error;
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});
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};
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FetchTransportInternal.prototype.cancel = function () {
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this.lastRequestId += 1;
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if (this.reader != undefined) {
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this.reader.cancel();
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this.reader = undefined;
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}
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};
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