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@@ -249,7 +249,7 @@ const zipped = fflate.zipSync({
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'other/tmp.txt': new Uint8Array([97, 98, 99, 100])
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},
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// You can also provide compression options
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- 'myImageData.bmp': [aMassiveFile, {
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+ 'massiveImage.bmp': [aMassiveFile, {
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level: 9,
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mem: 12,
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// ZIP-specific: mtime works here too, defaults to current time
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@@ -274,13 +274,21 @@ const zipped = fflate.zipSync({
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// | |-> 你好.txt
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// |-> other
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// | |-> tmp.txt
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-// myImageData.bmp
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+// massiveImage.bmp
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// superTinyFile.png
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// When decompressing, folders are not nested; all filepaths are fully
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// written out in the keys. For example, the return value may be:
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-// { 'nested/directory/a2.txt': Uint8Array(2) [97, 97] })
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-const decompressed = fflate.unzipSync(zipped);
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+// { 'nested/directory/structure.txt': Uint8Array(2) [97, 97] }
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+const decompressed = fflate.unzipSync(zipped, {
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+ // You may optionally supply a filter for files. By default, all files in a
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+ // ZIP archive are extracted, but a filter can save resources by telling
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+ // the library not to decompress certain files
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+ filter(file) {
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+ // Don't decompress the massive image or any files larger than 10 MiB
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+ return file.name != 'massiveImage.bmp' && file.originalSize <= 10_000_000;
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+ }
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+});
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```
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If you need extremely high performance or custom ZIP compression formats, you can use the highly-extensible ZIP streams. They take streams as both input and output. You can even use custom compression/decompression algorithms from other libraries, as long as they [are defined in the ZIP spec](https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT) (see section 4.4.5). If you'd like more info on using custom compressors, [feel free to ask](https://github.com/101arrowz/fflate/discussions).
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@@ -441,7 +449,7 @@ zip({ f1: aMassiveFile, 'f2.txt': anotherMassiveFile }, {
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});
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// unzip is the only async function without support for consume option
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-// Also parallelized, so unzip is also often much faster than unzipSync
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+// It is parallelized, so unzip is also often much faster than unzipSync
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unzip(aMassiveZIPFile, (err, unzipped) => {
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// If the archive has data.xml, log it here
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console.log(unzipped['data.xml']);
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Arjun Barrett