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A REST microservice that converts html input into pdf files. Written in Silex.

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html2pdf-service

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A REST microservice that converts html input into pdf files. Written in PHP on Silex, it uses the KNP snappy lib, which works over wkhtmltopdf.

Prerequisites

  • PHP 5.3 or higher.
  • A web server able to execute php code.
  • libcurl: apt-get install php5-curl
  • intl: apt-get install php5-intl

Installation

Download or clone this repository. Then, add permissions to the documents folder:

$ APACHEUSER=`ps aux | grep -E '[a]pache|[h]ttpd' | grep -v root | head -1 | cut -d\  -f1`
$ sudo setfacl -R -m u:$APACHEUSER:rwX -m u:`whoami`:rwX documents
$ sudo setfacl -dR -m u:$APACHEUSER:rwX -m u:`whoami`:rwX documents

Update vendors running php /path/to/your/composer.phar update

Setup the web server to attend requests to your installation.

Configure the binary

The default implementation is for Linux x64. If you are installing this service in other machines, you need to override the application defaults in web/app.php:

$app = new Application(__DIR__ . '/../', false);

$app['platform'] = 'mac';

$app->run();

Available platforms are mac, linux-x64 and linux-i368. If you run the server in a Windows machine, you will need to specify the full binary location:

$app = new Application(__DIR__ . '/../', false);

$app['binary'] = 'C:\path\to\khtmltopdf.exe';

$app->run();

Override default pdf output configuration

In your web/app.php file, include your settings like the following example:

$app = new Application(__DIR__ . '/../', false);

$app['default_settings'] = array(
    'encoding' => 'latin-1',
    'page-size' => 'Letter',
    );


$app->run();

Take a look at the wkhtmltopdf reference for further information.

Usage

Three different operations are provided:

Verb Route Request parameters Description
PUT /{document_name} content Generates the PDF document {document_name} from the given html content
GET /{document_name} Brings the document
DELETE /{document_name} Deletes the document, if exists

The response is always a json with a body key. In the GET case, it can also contain an encoding key with the encoding used to return the document.

Testing

Go to the servers root directory and execute phpunit.

Client-side implementations

TO-DO

  • Allow overriding default options from the client side

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A REST microservice that converts html input into pdf files. Written in Silex.

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