# pdf2html

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pdf2html helps to convert PDF file to HTML or Text using [Apache Tika](https://tika.apache.org/). This module also helps to generate thumbnail image for PDF file using [Apache PDFBox](https://pdfbox.apache.org/).

### Installation

via yarn:

```
yarn add pdf2html
```

via npm:

```
npm install --save pdf2html
```

**Java runtime environment (JRE) is required to run this module.**

### Usage

```javascript
const pdf2html = require('pdf2html');

const html = await pdf2html.html('sample.pdf');
console.log(html);
```

#### Convert to text

```javascript
const text = await pdf2html.text('sample.pdf');
console.log(text);
```

#### Convert as pages

```javascript
const htmlPages = await pdf2html.pages('sample.pdf');
console.log(htmlPages);
```

```javascript
const options = { text: true };
const textPages = await pdf2html.pages('sample.pdf', options);
console.log(textPages);
```

#### Extract metadata

```javascript
const meta = await pdf2html.meta('sample.pdf');
console.log(meta);
```

#### Customize maximum buffer to be used

The maxBuffer option specifies the largest number of bytes allowed on stdout or stderr. If this value is exceeded, then the child process is terminated.

By default, the maximum buffer size is 2MB. You can customize it by passing the `maxBuffer` option.

```javascript
await pdf2html.meta('sample.pdf', { maxBuffer: 1024 * 10000 }); // set maxBuffer to 10MB
await pdf2html.html('sample.pdf', { maxBuffer: 1024 * 10000 });
await pdf2html.text('sample.pdf', { maxBuffer: 1024 * 10000 });
await pdf2html.pages('sample.pdf', { maxBuffer: 1024 * 10000 });
await pdf2html.thumbnail('sample.pdf', { maxBuffer: 1024 * 10000 });
```

#### Generate thumbnail

```javascript
const thumbnailPath = await pdf2html.thumbnail('sample.pdf');
console.log(thumbnailPath);
```

```javascript
const options = { page: 1, imageType: 'png', width: 160, height: 226 };
const thumbnailPath = await pdf2html.thumbnail('sample.pdf', options);
console.log(thumbnailPath);
```

### Manually download dependencies files

Sometimes downloading the dependencies might be too slow or unable to download in a HTTP proxy environment. Follow the step below to skip the dependency downloads.

```bash
cd node_modules/pdf2html/vendor
# These URLs come from https://github.com/shebinleo/pdf2html/blob/master/postinstall.js#L6-L7
wget https://archive.apache.org/dist/pdfbox/2.0.27/pdfbox-app-2.0.27.jar
wget https://archive.apache.org/dist/tika/2.6.0/tika-app-2.6.0.jar
```