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50 lines
1.5 KiB
50 lines
1.5 KiB
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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