Created
August 6, 2022 08:47
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web file access api + web stream = unzip application
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Document</title> | |
| </head> | |
| <body> | |
| <h1 id="selectFile"></h1> | |
| <button id="inputGZ">gz file open</button> | |
| <h1 id="selectSaveDir"></h1> | |
| <button id="inputSaveDir">save ungzip file</button> | |
| <button id="runUGZ">run ungzip</button> | |
| <script src="./main.js"></script> | |
| </body> | |
| </html> |
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| const inputGZ = document.getElementById('inputGZ') | |
| const inputSaveDir = document.getElementById('inputSaveDir') | |
| const runUGZ = document.getElementById('runUGZ') | |
| const selectFile = document.getElementById('selectFile') | |
| const selectSaveDir = document.getElementById('selectSaveDir') | |
| const pickerOpts = { | |
| types: [ | |
| { | |
| description: 'gz file', | |
| accept: { | |
| 'application/tar+gzip': ['.gz'] | |
| } | |
| }, | |
| ], | |
| excludeAcceptAllOption: true, | |
| multiple: false | |
| }; | |
| let fileHandle; | |
| let saveHandle; | |
| inputGZ.addEventListener('click', async (e) => { | |
| [fileHandle] = await window.showOpenFilePicker(pickerOpts); | |
| console.log(fileHandle) | |
| selectFile.innerText = fileHandle.name | |
| }) | |
| inputSaveDir.addEventListener('click', async (e) => { | |
| saveHandle = await window.showSaveFilePicker({ | |
| suggestedName: fileHandle.name.split('.gz')[0] | |
| }); | |
| console.log(saveHandle) | |
| selectSaveDir.innerText = saveHandle.name | |
| }) | |
| runUGZ.addEventListener('click', async e => { | |
| if (!fileHandle || !saveHandle) { | |
| return; | |
| } | |
| const file = await fileHandle.getFile() | |
| const rs = file.stream() | |
| const ws = await saveHandle.createWritable(); | |
| const ds = new DecompressionStream('gzip'); | |
| console.log(file) | |
| console.log(rs) | |
| console.log(ws) | |
| console.log(ds) | |
| rs.pipeThrough(ds).pipeTo(ws) | |
| }) |
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