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40 lines
964 B
JavaScript
40 lines
964 B
JavaScript
"use strict";
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const Promise = require("bluebird");
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const fs = require("fs");
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function analyzeBuffer(buffer) {
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return buffer.length;
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}
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function analyzeBlob(blob) {
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return blob.size;
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}
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function analyzeStream(stream) {
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return Promise.try(() => {
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return fs.promises.stat(stream.path);
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}).then((stat) => {
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return stat.size;
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});
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}
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function analyzeString(string) {
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// NOTE: string.length would produce the size in *code units*, but we want the size in *bytes*
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return (new TextEncoder().encode(string)).length;
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}
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module.exports = function getFilesize(file) {
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if (typeof file === "string") {
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return analyzeString(file);
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} else if (typeof Blob !== "undefined" && file instanceof Blob) {
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return analyzeBlob(file);
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} else if (Buffer.isBuffer(file)) {
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return analyzeBuffer(file);
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} else if (file._readableState != null && file.path != null) {
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return analyzeStream(file);
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} else {
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throw new Error(`Invalid file passed`); // FIXME: Validate
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}
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};
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