I want to read the contents of the file and use node-gzip.

I am thinking of compressing the file with JavaScript and transferring it to the server in node-gzip.
On this page, as shown below (see ), there is a description of the text as input.
(Here's 'Hello World')
I replaced 'Hello World' like fileA.txt because I want to specify a file for this text and compress it, but I got an error.
I'm sorry this is a very rudimentary question, but I'd appreciate it if you could let me know.

const{gzip,ungzip}=require('node-gzip');
const compressed = wait gzip('Hello World');
constdecompressed=awaitungzip(compressed);
console.log(decompressed.toString(); // Hello World

javascript nodejs gzip

2022-11-08 19:57

1 Answers

node-gzip is

according to README

Buffer|TypedArray|DataView|ArrayBuffer|string

Accept the .The fs.readFile returns the contents of the file with either string or Buffer, so that's fine.

constfs=require('node:fs/promises');
const {gzip,ungzip} = require('node-gzip');

;(async function(){
    const data = wait fs.readFile("hello.txt");
    const compressed = wait gzip(data);
    constdecompressed=awaitungzip(compressed);
    console.log(decompressed.toString());
})()

If you are using a version of Node.js where the prefix node: cannot be used, specify the module without the prefix as shown below.However, it does not delete /promises.

constfs=require('fs/promises');

If you want to move on the client (browser) side

That's impossible.
The Node.js API is not implemented on the client (browser). Therefore, neither the zlib module nor the node-gzip module that depends on it will work. The fs module is easy to understand considering security and privacy. It's a big deal if you can read and write files on your machine by specifying a file name.

For that reason, we have no choice but to give up the structure according to the question.However,

Have the user submit the file
In that case, have it compressed

It is not entirely impossible thatTry searching with keywords such as "POST files (and data)". (You should forget about compression and complete it.)

2022-11-08 23:46

If you have any answers or tips

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