51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
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const withNativeArrayBuffer = typeof ArrayBuffer === "function";
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const isView = (obj) => {
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return typeof ArrayBuffer.isView === "function"
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? ArrayBuffer.isView(obj)
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: obj.buffer instanceof ArrayBuffer;
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};
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const toString = Object.prototype.toString;
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const withNativeBlob = typeof Blob === "function" ||
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(typeof Blob !== "undefined" &&
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toString.call(Blob) === "[object BlobConstructor]");
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const withNativeFile = typeof File === "function" ||
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(typeof File !== "undefined" &&
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toString.call(File) === "[object FileConstructor]");
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/**
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* Returns true if obj is a Buffer, an ArrayBuffer, a Blob or a File.
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*
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* @private
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*/
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export function isBinary(obj) {
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return ((withNativeArrayBuffer && (obj instanceof ArrayBuffer || isView(obj))) ||
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(withNativeBlob && obj instanceof Blob) ||
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(withNativeFile && obj instanceof File));
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}
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export function hasBinary(obj, toJSON) {
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if (!obj || typeof obj !== "object") {
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return false;
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}
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if (Array.isArray(obj)) {
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for (let i = 0, l = obj.length; i < l; i++) {
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if (hasBinary(obj[i])) {
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return true;
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}
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}
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return false;
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}
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if (isBinary(obj)) {
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return true;
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}
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if (obj.toJSON &&
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typeof obj.toJSON === "function" &&
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arguments.length === 1) {
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return hasBinary(obj.toJSON(), true);
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}
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for (const key in obj) {
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if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {
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return true;
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}
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}
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return false;
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}
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