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hp-webscan

Package to scan documents with the HP webscan unofficial API

Uses calls from printer's web interface (port 80)

• ES6 (needs Node.JS >= 6.0.0)
• Choose format and size
• Fast
• Error(s) management
• Only ≈65 lines

Usage

Please see notes before using this module

Installation

npm install hp-webscan

Scan a document

const Webscan = require("hp-webscan");
const fs = require("fs");
 
var ws = new Webscan("printer's hostname/ip", 1);
 
// See type, fmt, size definitions below
ws.scan({ type: 4, fmt: 1, size: 2 }, (data, error) => {
  if(error) {
    console.log("an error occured: " + error.code)
  }
  else {
    // Do whatever you want with the binary data
    // Here we write the document on disk using fs
    fs.writeFile(__dirname + "/scan.jpg", data, "binary", (err) => {
      if(err) {
        return console.log(err);
      }
      else console.log("Document successfully scanned and saved!")
    });
  }
})

Get a preview (much faster than a scan)

ws.preview({ type: 2 }, (data, error) => {
  if(error) {
    console.log("an error occured: " + error.code)
  }
  else {
    // Do whatever you want with data
    // Here we write the document on disk
    fs.writeFile(__dirname + "/preview.jpg", data, "binary", (err) => {
      if(err) {
        return console.log(err);
      }
    });
  }
})

Types

ID	Value
1	Text (black and white)
2	Picture (black and white)
3	Drawing (colored)
4	Picture (colored)

Sizes

ID	Value
0	Letter
1	Executive
2	A4(8.27x11.69")‎
3	10.16x15.24 cm. (4x6")‎
4	12.7X17.78 cm. (5x7")
5	7.6x12.7 cm. (3x5")‎
6	7.6x7.6 cm. (3x3")‎

Formats

ID	Value
1	image/jpeg
2	application/pdf (crashes my printer)

Error codes

Code	Meaning
WS_STATUS	Webinterface can't be reached or version incompatible
GET_SCAN	Cannot download the scanned document
GET_PREVIEW	Cannot download the previewed document

Notes

• I'm NOT affiliated with Hewlett Packard/HP or one of its branches
• You could combine this module with node-tesseract to make a powerful ocr-scanner
• This module may not work on another version than mine, I have this one:

Name	Value
Product Name	HP Deskjet F4500 series
Product Model	Number CB755B
Product Serial	Number CN9CIB218Z05H5
Service ID	20090
Printer ID	4
Firmware Version	MPxxFN0937AR