67 lines
2.3 KiB
JavaScript
67 lines
2.3 KiB
JavaScript
import { promisify } from 'node:util';
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import zlib from 'node:zlib';
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import { Buffer } from 'node:buffer';
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import { getRequestHeader, setResponseHeader, send } from 'h3';
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function getAnyCompression(event) {
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const encoding = getRequestHeader(event, "accept-encoding");
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if (encoding?.includes("br"))
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return "br";
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if (encoding?.includes("gzip"))
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return "gzip";
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if (encoding?.includes("deflate"))
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return "deflate";
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return void 0;
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}
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async function compress(event, response, method) {
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const compression = promisify(zlib[method === "br" ? "brotliCompress" : method]);
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const acceptsEncoding = getRequestHeader(event, "accept-encoding")?.includes(
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method
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);
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if (acceptsEncoding && typeof response.body === "string") {
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setResponseHeader(event, "Content-Encoding", method);
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send(event, await compression(Buffer.from(response.body)));
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}
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}
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async function compressStream(event, response, method) {
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const stream = new Response(response.body).body;
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const acceptsEncoding = getRequestHeader(event, "accept-encoding")?.includes(
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method
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);
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if (acceptsEncoding) {
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setResponseHeader(event, "Content-Encoding", method);
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response.body = stream.pipeThrough(new CompressionStream(method));
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} else {
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response.body = stream;
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}
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}
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async function useGZipCompression(event, response) {
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await compress(event, response, "gzip");
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}
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async function useDeflateCompression(event, response) {
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await compress(event, response, "deflate");
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}
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async function useBrotliCompression(event, response) {
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await compress(event, response, "br");
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}
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async function useCompression(event, response) {
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const compression = getAnyCompression(event);
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if (compression)
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await compress(event, response, compression);
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}
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async function useGZipCompressionStream(event, response) {
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await compressStream(event, response, "gzip");
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}
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async function useDeflateCompressionStream(event, response) {
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await compressStream(event, response, "deflate");
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}
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async function useCompressionStream(event, response) {
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const compression = getAnyCompression(event);
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if (compression && compression !== "br")
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await compressStream(event, response, compression);
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}
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export { useBrotliCompression, useCompression, useCompressionStream, useDeflateCompression, useDeflateCompressionStream, useGZipCompression, useGZipCompressionStream };
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