Function getContentLength

index.cjs:2849–2861

(httpReader, sendRequest, getRequestData)

}

async function getContentLength(httpReader, sendRequest, getRequestData) {
	if (httpReader.preventHeadRequest) {
		await getRequestData(httpReader, httpReader.options);
	} else {
		const response = await sendRequest(HTTP_METHOD_HEAD, httpReader, getHeaders(httpReader));
		const contentLength = response.headers.get(HTTP_HEADER_CONTENT_LENGTH);
		if (contentLength) {
			httpReader.size = Number(contentLength);
		} else {
			await getRequestData(httpReader, httpReader.options);
		}
	}
}

async function sendFetchRequest(method, { options, url }, headers) {
	const response = await fetch(url, Object.assign({}, options, { method, headers }));