npm package: @lprib/pdf-parse
Description: Pure javascript cross-platform module to extract text from PDFs.
Author: Mehmet Kozan
Latest version: 0.0.1

# Disclaimer

Thanks to Mehmet.Kozan for the amazing package, this package is inspired in the one offered by him at his GitLab (https://gitlab.com/autokent/pdf-parse) and NPM (https://www.npmjs.com/package/pdf-parse?activeTab=readme).
This clone package was created to respond to the necessities of my project, so, all the code that makes this package work are from the hard work of Mehmet.Kozan, which we acknowledge, and in no way, want to steal from.

# pdf-parse

**Pure javascript cross-platform module to extract texts from PDFs.**

[![version](https://img.shields.io/npm/v/pdf-parse.svg)](https://www.npmjs.org/package/pdf-parse)
[![downloads](https://img.shields.io/npm/dt/pdf-parse.svg)](https://www.npmjs.org/package/pdf-parse)
[![node](https://img.shields.io/node/v/pdf-parse.svg)](https://nodejs.org/)
[![status](https://gitlab.com/autokent/pdf-parse/badges/master/pipeline.svg)](https://gitlab.com/autokent/pdf-parse/pipelines)

## Similar Packages
* [pdf2json](https://www.npmjs.com/package/pdf2json) buggy, no support anymore, memory leak, throws non-catchable fatal errors
* [j-pdfjson](https://www.npmjs.com/package/j-pdfjson) fork of pdf2json
* [pdf-parser](https://github.com/dunso/pdf-parse) buggy, no tests
* [pdfreader](https://www.npmjs.com/package/pdfreader) using pdf2json
* [pdf-extract](https://www.npmjs.com/package/pdf-extract) not cross-platform using xpdf

## Installation
`npm install pdf-parse`
 
## Basic Usage - Local Files

```js
const fs = require('fs');
const pdf = require('pdf-parse');

let dataBuffer = fs.readFileSync('path to PDF file...');

pdf(dataBuffer).then(function(data) {

	// number of pages
	console.log(data.numpages);
	// number of rendered pages
	console.log(data.numrender);
	// PDF info
	console.log(data.info);
	// PDF metadata
	console.log(data.metadata); 
	// PDF.js version
	// check https://mozilla.github.io/pdf.js/getting_started/
	console.log(data.version);
	// PDF text
	console.log(data.text); 
        
});
```

## Basic Usage - HTTP
You can use [crawler-request](https://www.npmjs.com/package/crawler-request) which uses the `pdf-parse`

## Exception Handling

```js
const fs = require('fs');
const pdf = require('pdf-parse');

let dataBuffer = fs.readFileSync('path to PDF file...');

pdf(dataBuffer).then(function(data) {
	// use data
})
.catch(function(error){
	// handle exceptions
})
```

## Extend
* v1.0.9 and above break pagerender callback [changelog](https://gitlab.com/autokent/pdf-parse/blob/master/CHANGELOG)
* If you need another format like json, you can change page render behaviour with a callback
* Check out https://mozilla.github.io/pdf.js/

```js
// default render callback
function render_page(pageData) {
    //check documents https://mozilla.github.io/pdf.js/
    let render_options = {
        //replaces all occurrences of whitespace with standard spaces (0x20). The default value is `false`.
        normalizeWhitespace: false,
        //do not attempt to combine same line TextItem's. The default value is `false`.
        disableCombineTextItems: false
    }

    return pageData.getTextContent(render_options)
	.then(function(textContent) {
		let lastY, text = '';
		for (let item of textContent.items) {
			if (lastY == item.transform[5] || !lastY){
				text += item.str;
			}  
			else{
				text += '\n' + item.str;
			}    
			lastY = item.transform[5];
		}
		return text;
	});
}

let options = {
    pagerender: render_page
}

let dataBuffer = fs.readFileSync('path to PDF file...');

pdf(dataBuffer,options).then(function(data) {
	//use new format
});
```

## Options

```js
const DEFAULT_OPTIONS = {
	// internal page parser callback
	// you can set this option, if you need another format except raw text
	pagerender: render_page,
	
	// max page number to parse
	max: 0,
	
	//check https://mozilla.github.io/pdf.js/getting_started/
	version: 'v1.10.100'
}
```
### *pagerender* (callback)
If you need another format except raw text.  

### *max* (number)
Max number of page to parse. If the value is less than or equal to 0, parser renders all pages.  

### *version* (string, pdf.js version)
check [pdf.js](https://mozilla.github.io/pdf.js/getting_started/)

* `'default'`
* `'v1.9.426'`
* `'v1.10.100'`
* `'v1.10.88'`
* `'v2.0.550'`

>*default* version is *v1.10.100*   
>[mozilla.github.io/pdf.js](https://mozilla.github.io/pdf.js/getting_started/#download)

## Test
* `mocha` or `npm test`
* Check [test folder](https://gitlab.com/autokent/pdf-parse/tree/master/test) and [quickstart.js](https://gitlab.com/autokent/pdf-parse/blob/master/quickstart.js) for extra usages.

## Support
I use this package actively myself, so it has my top priority. You can chat on WhatsApp about any infos, ideas and suggestions.

[![WhatsApp](https://img.shields.io/badge/style-chat-green.svg?style=flat&label=whatsapp)](https://api.whatsapp.com/send?phone=905063042480&text=Hi%2C%0ALet%27s%20talk%20about%20pdf-parse)

### Submitting an Issue
If you find a bug or a mistake, you can help by submitting an issue to [GitLab Repository](https://gitlab.com/autokent/pdf-parse/issues)

### Creating a Merge Request
GitLab calls it merge request instead of pull request.  

* [A Guide for First-Timers](https://about.gitlab.com/2016/06/16/fearless-contribution-a-guide-for-first-timers/)
* [How to create a merge request](https://docs.gitlab.com/ee/gitlab-basics/add-merge-request.html)
* Check [Contributing Guide](https://gitlab.com/autokent/pdf-parse/blob/master/CONTRIBUTING.md) 

## License
[MIT licensed](https://gitlab.com/autokent/pdf-parse/blob/master/LICENSE) and all it's dependencies are MIT or BSD licensed.