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42 lines
1.3 KiB
42 lines
1.3 KiB
export class MultipartData {
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boundary = '----------------SlashCreate';
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bufs: Uint8Array[] = [];
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async attach(fieldName: string, data: any, filename?: string) {
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if (data === undefined) return;
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let str = '\r\n--' + this.boundary + '\r\nContent-Disposition: form-data; name="' + fieldName + '"';
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if (filename) str += '; filename="' + filename + '"';
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if (data instanceof Blob || data instanceof File) {
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str += `\r\nContent-Type: ${data.type}`;
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data = new Uint8Array(await data.arrayBuffer());
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} else if (data instanceof ArrayBuffer || data instanceof Uint8Array) {
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str += '\r\nContent-Type: application/octet-stream';
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data = new Uint8Array(data);
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} else if (typeof data === 'object') {
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str += '\r\nContent-Type: application/json';
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data = encode(JSON.stringify(data));
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} else {
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data = encode('' + data);
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}
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this.bufs.push(encode(str + '\r\n\r\n'));
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this.bufs.push(data);
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}
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finish() {
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this.bufs.push(encode('\r\n--' + this.boundary + '--'));
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let index = 0;
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const result = new Uint8Array(this.bufs.reduce((a, b) => a + b.byteLength, 0));
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for (const buf of this.bufs) {
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result.set(new Uint8Array(buf), index);
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index += buf.byteLength;
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}
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return result;
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}
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}
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function encode(text: string) {
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return new TextEncoder().encode(text);
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}
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