@quyse/client-zip/index.js

A tiny and fast client-side streaming ZIP generator

"stream"in Blob.prototype||Object.defineProperty(Blob.prototype,"stream",{value(){return new Response(this).body}}),"setBigUint64"in DataView.prototype||Object.defineProperty(DataView.prototype,"setBigUint64",{value(e,n,t){const i=Number(0xffffffffn&n),r=Number(n>>32n);this.setUint32(e+(t?0:4),i,t),this.setUint32(e+(t?4:0),r,t)}});var e=e=>new DataView(new ArrayBuffer(e)),n=e=>new Uint8Array(e.buffer||e),t=e=>(new TextEncoder).encode(String(e)),i=e=>Math.min(4294967295,Number(e)),r=e=>Math.min(65535,Number(e));function o(e,i,r){if(void 0===i||i instanceof Date||(i=new Date(i)),e instanceof File)return{isFile:1,t:i||new Date(e.lastModified),i:e.stream(),mode:r};if(e instanceof Response)return{isFile:1,t:i||new Date(e.headers.get("Last-Modified")||Date.now()),i:e.body,mode:r};if(void 0===i)i=new Date;else if(isNaN(i))throw new Error("Invalid modification date.");if(void 0===e)return{isFile:0,t:i,mode:r};if("string"==typeof e)return{isFile:1,t:i,i:t(e),mode:r};if(e instanceof Blob)return{isFile:1,t:i,i:e.stream(),mode:r};if(e instanceof Uint8Array||e instanceof ReadableStream)return{isFile:1,t:i,i:e,mode:r};if(e instanceof ArrayBuffer||ArrayBuffer.isView(e))return{isFile:1,t:i,i:n(e),mode:r};if(Symbol.asyncIterator in e)return{isFile:1,t:i,i:f(e[Symbol.asyncIterator]()),mode:r};throw new TypeError("Unsupported input format.")}function f(e,n=e){return new ReadableStream({async pull(n){let t=0;for(;n.desiredSize>t;){const i=await e.next();if(!i.value){n.close();break}{const e=a(i.value);n.enqueue(e),t+=e.byteLength}}},cancel(e){n.throw?.(e)}})}function a(e){return"string"==typeof e?t(e):e instanceof Uint8Array?e:n(e)}function s(e,i,r){let[o,f]=function(e){return e?e instanceof Uint8Array?[e,1]:ArrayBuffer.isView(e)||e instanceof ArrayBuffer?[n(e),1]:[t(e),0]:[void 0,0]}(i);if(e instanceof File)return{o:d(o||t(e.name)),u:BigInt(e.size),l:f};if(e instanceof Response){const n=e.headers.get("content-disposition"),i=n&&n.match(/;\s*filename\*?\s*=\s*(?:UTF-\d+''|)["']?([^;"'\r\n]*)["']?(?:;|$)/i),a=i&&i[1]||e.url&&new URL(e.url).pathname.split("/").findLast(Boolean),s=a&&decodeURIComponent(a),u=r||+e.headers.get("content-length");return{o:d(o||t(s)),u:BigInt(u),l:f}}return o=d(o,void 0!==e||void 0!==r),"string"==typeof e?{o,u:BigInt(t(e).length),l:f}:e instanceof Blob?{o,u:BigInt(e.size),l:f}:e instanceof ArrayBuffer||ArrayBuffer.isView(e)?{o,u:BigInt(e.byteLength),l:f}:{o,u:u(e,r),l:f}}function u(e,n){return n>-1?BigInt(n):e?void 0:0n}function d(e,n=1){if(!e||e.every((c=>47===c)))throw new Error("The file must have a name.");if(n)for(;47===e[e.length-1];)e=e.subarray(0,-1);else 47!==e[e.length-1]&&(e=new Uint8Array([...e,47]));return e}var l=new Uint32Array(256);for(let e=0;e<256;++e){let n=e;for(let e=0;e<8;++e)n=n>>>1^(1&n&&3988292384);l[e]=n}function y(e,n=0){n^=-1;for(var t=0,i=e.length;t<i;t++)n=n>>>8^l[255&n^e[t]];return(-1^n)>>>0}function w(e,n,t=0){const i=e.getSeconds()>>1|e.getMinutes()<<5|e.getHours()<<11,r=e.getDate()|e.getMonth()+1<<5|e.getFullYear()-1980<<9;n.setUint16(t,i,1),n.setUint16(t+2,r,1)}function B({o:e,l:n},t){return 8*(!n||(t??function(e){try{b.decode(e)}catch{return 0}return 1}(e)))}var b=new TextDecoder("utf8",{fatal:1});function p(t,i=0){const r=e(30);return r.setUint32(0,1347093252),r.setUint32(4,754976768|i),w(t.t,r,10),r.setUint16(26,t.o.length,1),n(r)}async function*g(e){let{i:n}=e;if("then"in n&&(n=await n),n instanceof Uint8Array)yield n,e.m=y(n,0),e.u=BigInt(n.length);else{e.u=0n;const t=n.getReader();for(;;){const{value:n,done:i}=await t.read();if(i)break;e.m=y(n,e.m),e.u+=BigInt(n.length),yield n}}}function I(t,r){const o=e(16+(r?8:0));return o.setUint32(0,1347094280),o.setUint32(4,t.isFile?t.m:0,1),r?(o.setBigUint64(8,t.u,1),o.setBigUint64(16,t.u,1)):(o.setUint32(8,i(t.u),1),o.setUint32(12,i(t.u),1)),n(o)}function v(t,r,o=0,f=0){const a=e(46);return a.setUint32(0,1347092738),a.setUint32(4,755182848),a.setUint16(8,2048|o),w(t.t,a,12),a.setUint32(16,t.isFile?t.m:0,1),a.setUint32(20,i(t.u),1),a.setUint32(24,i(t.u),1),a.setUint16(28,t.o.length,1),a.setUint16(30,f,1),a.setUint16(40,null!=t.mode?t.mode|(t.isFile?32768:16384):t.isFile?33204:16893,1),a.setUint32(42,i(r),1),n(a)}function h(t,i,r){const o=e(r);return o.setUint16(0,1,1),o.setUint16(2,r-4,1),16&r&&(o.setBigUint64(4,t.u,1),o.setBigUint64(12,t.u,1)),o.setBigUint64(r-8,i,1),n(o)}function D(e){return e instanceof File||e instanceof Response?[[e],[e]]:[[e.input,e.name,e.size],[e.input,e.lastModified,e.mode]]}var S=e=>function(e){let n=BigInt(22),t=0n,i=0;for(const r of e){if(!r.o)throw new Error("Every file must have a non-empty name.");if(void 0===r.u)throw new Error(`Missing size for file "${(new TextDecoder).decode(r.o)}".`);const e=r.u>=0xffffffffn,o=t>=0xffffffffn;t+=BigInt(46+r.o.length+(e&&8))+r.u,n+=BigInt(r.o.length+46+(12*o|28*e)),i||(i=e)}return(i||t>=0xffffffffn)&&(n+=BigInt(76)),n+t}(function*(e){for(const n of e)yield s(...D(n)[0])}(e));function A(e,n={}){const t={"Content-Type":"application/zip","Content-Disposition":"attachment"};return("bigint"==typeof n.length||Number.isInteger(n.length))&&n.length>0&&(t["Content-Length"]=String(n.length)),n.metadata&&(t["Content-Length"]=String(S(n.metadata))),new Response(N(e,n),{headers:t})}function N(t,a={}){const u=function(e){const n=e[Symbol.iterator in e?Symbol.iterator:Symbol.asyncIterator]();return{async next(){const e=await n.next();if(e.done)return e;const[t,i]=D(e.value);return{done:0,value:Object.assign(o(...i),s(...t))}},throw:n.throw?.bind(n),[Symbol.asyncIterator](){return this}}}(t);return f(async function*(t,o){const f=[];let a=0n,s=0n,u=0;for await(const e of t){const n=B(e,o.buffersAreUTF8);yield p(e,n),yield new Uint8Array(e.o),e.isFile&&(yield*g(e));const t=e.u>=0xffffffffn,i=12*(a>=0xffffffffn)|28*t;yield I(e,t),f.push(v(e,a,n,i)),f.push(e.o),i&&f.push(h(e,a,i)),t&&(a+=8n),s++,a+=BigInt(46+e.o.length)+e.u,u||(u=t)}let d=0n;for(const e of f)yield e,d+=BigInt(e.length);if(u||a>=0xffffffffn){const t=e(76);t.setUint32(0,1347094022),t.setBigUint64(4,BigInt(44),1),t.setUint32(12,755182848),t.setBigUint64(24,s,1),t.setBigUint64(32,s,1),t.setBigUint64(40,d,1),t.setBigUint64(48,a,1),t.setUint32(56,1347094023),t.setBigUint64(64,a+d,1),t.setUint32(72,1,1),yield n(t)}const l=e(22);l.setUint32(0,1347093766),l.setUint16(8,r(s),1),l.setUint16(10,r(s),1),l.setUint32(12,i(d),1),l.setUint32(16,i(a),1),yield n(l)}(u,a),u)}export{A as downloadZip,N as makeZip,S as predictLength};