73 lines
2.4 KiB
JavaScript
73 lines
2.4 KiB
JavaScript
"use strict";
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.encodePacket = exports.encodePacketToBinary = void 0;
|
|
const commons_js_1 = require("./commons.js");
|
|
const withNativeBlob = typeof Blob === "function" ||
|
|
(typeof Blob !== "undefined" &&
|
|
Object.prototype.toString.call(Blob) === "[object BlobConstructor]");
|
|
const withNativeArrayBuffer = typeof ArrayBuffer === "function";
|
|
// ArrayBuffer.isView method is not defined in IE10
|
|
const isView = (obj) => {
|
|
return typeof ArrayBuffer.isView === "function"
|
|
? ArrayBuffer.isView(obj)
|
|
: obj && obj.buffer instanceof ArrayBuffer;
|
|
};
|
|
const encodePacket = ({ type, data }, supportsBinary, callback) => {
|
|
if (withNativeBlob && data instanceof Blob) {
|
|
if (supportsBinary) {
|
|
return callback(data);
|
|
}
|
|
else {
|
|
return encodeBlobAsBase64(data, callback);
|
|
}
|
|
}
|
|
else if (withNativeArrayBuffer &&
|
|
(data instanceof ArrayBuffer || isView(data))) {
|
|
if (supportsBinary) {
|
|
return callback(data);
|
|
}
|
|
else {
|
|
return encodeBlobAsBase64(new Blob([data]), callback);
|
|
}
|
|
}
|
|
// plain string
|
|
return callback(commons_js_1.PACKET_TYPES[type] + (data || ""));
|
|
};
|
|
exports.encodePacket = encodePacket;
|
|
const encodeBlobAsBase64 = (data, callback) => {
|
|
const fileReader = new FileReader();
|
|
fileReader.onload = function () {
|
|
const content = fileReader.result.split(",")[1];
|
|
callback("b" + (content || ""));
|
|
};
|
|
return fileReader.readAsDataURL(data);
|
|
};
|
|
function toArray(data) {
|
|
if (data instanceof Uint8Array) {
|
|
return data;
|
|
}
|
|
else if (data instanceof ArrayBuffer) {
|
|
return new Uint8Array(data);
|
|
}
|
|
else {
|
|
return new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
|
|
}
|
|
}
|
|
let TEXT_ENCODER;
|
|
function encodePacketToBinary(packet, callback) {
|
|
if (withNativeBlob && packet.data instanceof Blob) {
|
|
return packet.data.arrayBuffer().then(toArray).then(callback);
|
|
}
|
|
else if (withNativeArrayBuffer &&
|
|
(packet.data instanceof ArrayBuffer || isView(packet.data))) {
|
|
return callback(toArray(packet.data));
|
|
}
|
|
encodePacket(packet, false, (encoded) => {
|
|
if (!TEXT_ENCODER) {
|
|
TEXT_ENCODER = new TextEncoder();
|
|
}
|
|
callback(TEXT_ENCODER.encode(encoded));
|
|
});
|
|
}
|
|
exports.encodePacketToBinary = encodePacketToBinary;
|