Questions tagged [node.js-buffer]
9 questions
4
votes
1 answer
Python equivalent of Node.js Buffer.from('string', 'base64')
I'm trying to implement authorization based on a hash-based message authentication code (HMAC)-encrypted authorization header. To do so I need to use the authorization header to verify the authenticity of the message content by recalculating the…
flintpnz
- 41
- 3
3
votes
1 answer
Canonical way to remove multiple bytes from buffer
Say I have a simple Buffer in Node.js like so:
const bytes = Buffer.from('abcdefg');
this buffer instance has slice and concat as methods, but I am really not sure how to use these to basically create the functionality of pop/shift/splice of an…
Alexander Mills
- 90,741
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2
votes
1 answer
How to send the buffer correctly in node.js via response.write?
I am trying to send out the binary content from a node.js server. To do this, I allocate a buffer and fill up the buffer with my content, and call response.write() on it. Once it returns, I reuse the buffer with the new content. However it doesn't…
George Y.
- 11,307
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1
vote
0 answers
Cannot parse a PDF stream using pdf-parse on Azure pipelines (Nodejs)
We have an Nodejs api endpoint that creates a pdf stream using the html-pdf and streams it through the response. This is working as expected, we can download the pdf through the browser.
I am trying to write a unit test (chai and mocha) for…
Over Age
- 21
- 3
1
vote
0 answers
Creating an Image File using node.js buffer from input text
I have a requirement in which I need to convert an input text to a png/jpeg file and then convert to base64 string and send as an input to an API.
I cannot use node.js fs module since I cannot physically create files.
So I was trying to user…
Avinash
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- 2
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1
vote
2 answers
Node.js using deferent data types in bytes array
I need to create a byte array with deferent data types in it, For example: i will have data that will contain Byte (0-100), Byte(0-10), Two bytes(-30-+100), Bool(0/1), Byte, Two Bytes(0-300).
The client will receive the bytes array (using Buffer)…
Erez
- 1,933
- 5
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1
vote
0 answers
Raspberry pi USB serial transmission
I have problem with to the raspberry's usb serial tx direction.
I use npm's serialport software with node.js.
If I plug the usb cable (max232) with windows to serialmonitor, I can see the hex code (what I send from raspberry). But when I plug the…
Jdoe
- 21
- 2
0
votes
1 answer
Write array to Buffer on a specific offset in Node.js
I wish to add an array to a buffer at a specific offset. This does not work:
let buffer = Buffer.alloc(65);
buffer.writeUInt8(0x91, 0);
buffer.write([127, 0, 0, 1 ], 1);
buffer.write("admin", 5);
buffer.write("admin", 31);
as it gives me the…
robtot
- 863
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-1
votes
1 answer
Why does using toString('binary') on a Node.js buffer give strange characters?
I have something similar to the following code:
const fs = require('fs');
const imageBuffer = fs.readFileSync('path/to/image.jpg');
const binary = imageBuffer.toString('binary');
console.log(binary)
Which gives something…
Jack
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