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96 lines
3.1 KiB
96 lines
3.1 KiB
2 years ago
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Md5FileHasher = void 0;
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var md5_1 = require("./md5");
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// Hashes any blob
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var Md5FileHasher = /** @class */ (function () {
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function Md5FileHasher(_callback, // Callback to return the result
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_async, // Async version is not always available in a web worker
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_partSize) {
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if (_async === void 0) { _async = true; }
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if (_partSize === void 0) { _partSize = 1048576; }
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this._callback = _callback;
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this._async = _async;
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this._partSize = _partSize;
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this._configureReader();
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}
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/**
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* Hash a blob of data in the worker
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* @param blob Data to hash
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*/
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Md5FileHasher.prototype.hash = function (blob) {
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var self = this;
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self._blob = blob;
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// self._length = Math.ceil(blob.size / self._partSize);
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self._part = 0;
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self._md5 = new md5_1.Md5();
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self._processPart();
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};
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Md5FileHasher.prototype._fail = function () {
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this._callback({
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success: false,
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result: 'data read failed'
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});
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};
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Md5FileHasher.prototype._hashData = function (e) {
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var self = this;
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self._md5.appendByteArray(new Uint8Array(e.target.result));
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if (self._part * self._partSize >= self._blob.size) {
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self._callback({
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success: true,
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result: self._md5.end()
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});
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}
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else {
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self._processPart();
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}
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};
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Md5FileHasher.prototype._processPart = function () {
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var self = this;
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var endbyte = 0;
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var current_part;
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self._part += 1;
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if (self._blob.size > self._partSize) { // If blob bigger then part_size we will slice it up
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endbyte = self._part * self._partSize;
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if (endbyte > self._blob.size) {
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endbyte = self._blob.size;
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}
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current_part = self._blob.slice((self._part - 1) * self._partSize, endbyte);
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}
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else {
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current_part = self._blob;
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}
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if (self._async) {
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self._reader.readAsArrayBuffer(current_part);
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}
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else {
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setTimeout(function () {
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try {
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self._hashData({
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target: {
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result: self._reader.readAsArrayBuffer(current_part)
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},
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});
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}
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catch (e) {
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self._fail();
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}
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}, 0);
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}
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};
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Md5FileHasher.prototype._configureReader = function () {
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var self = this;
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if (self._async) {
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self._reader = new FileReader();
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self._reader.onload = self._hashData.bind(self);
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self._reader.onerror = self._fail.bind(self);
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self._reader.onabort = self._fail.bind(self);
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}
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else {
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self._reader = new FileReaderSync();
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}
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};
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return Md5FileHasher;
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}());
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exports.Md5FileHasher = Md5FileHasher;
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//# sourceMappingURL=md5_file_hasher.js.map
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