◆結論
Compression Streams API – Web API | MDN (mozilla.org)
例えばdeflateの解凍だけを関数にしたら以下のとおり。
export const inflate = (data: ReadableStream): Body => {
const decompressedStream = data.pipeThrough(new DecompressionStream('deflate'));
return new Response(decompressedStream);
};
export const inflateBlob = (data: Blob): Body => {
const decompressedStream = data.stream().pipeThrough(new DecompressionStream('deflate'));
return new Response(decompressedStream);
};
export const inflateArrayBuffer = (data: ArrayBuffer): Body => {
const resp = new Response(data);
if (!resp.body) return resp;
const decompressedStream = resp.body.pipeThrough(new DecompressionStream('deflate'));
return new Response(decompressedStream);
};
‘deflate’を’gzip’にすればgzipだし、DecompressionStreamをCompressionStreamにすれば圧縮できるし。
上記はTypeScriptなんで、JavaScriptで使おうと思ったら「:」の型指定を消して差し上げろ。exportも不要なら消せ。