Introduction

CloudExport helps to export your report to PDF or other format using export service providers. ChromeHeadless.io is the first cloud service we implemented for CloudExport. ChromeHeadless.io is developed by us so you can assure the compatibility as well as the quality of result.

Installation

By downloading .zip file

Download
Unzip the zip file
Copy the folder cloudexport into koolreport folder so that look like below

koolreport
├── core
├── cloudexport

By composer

composer require koolreport/cloudexport

ChromeHeadless.io

Overview

ChomeHeadless.io is an online service helps to convert HTML to PDF and other image format. Running on highly optimized hardware and software, the ChomeHeadless.io will save your time in installing headless browsers like Phantomjs or Google Chrome. It also saves you server resources which you may reserve for other crucial tasks. The Chromeheadless.io is in beta version so all are free.

Get Token Key

Register an account in ChromeHeadless.io. An email with title "Welcome to ChromeHeadless.io" will be sent to you in few minutes after your sign up.
Use account credential in welcome email to log in our system.
Go to tokens management page
Hit Generate button to generate token key.

Example

MyReport.php

class MyReport extends \koolreport\KoolReport
{
    //Register cloud export service in your report
    use \koolreport\cloudexport\Exportable;
}

MyReportPDF.view.php

<html>
    <body>
        <h1>This is my first export using Chromeheadless.io</h1>
        <p>Chromeheadless.io save your time and resources in exporting html, report to PDF.</p>
    </body>
</html>

index.php

require_once "../koolreport/core/autoload.php";
require_once "MyReport.php";

$report = new MyReport;
$report->run()
->cloudExport("MyReportPDF")
->chromeHeadlessio("token-key")
->pdf()
->toBrowser("myreport.pdf");

Export engines

ChromeHeadless.io has three pdf export engines which are headless chrome, wkhtmltopdf, and phantomjs. Here're examples to use them:

$report->run()
->cloudExport("MyReportPDF")
->chromeHeadlessio("token-key")
->pdf($chromePDFOptions)
->toBrowser("myreport.pdf");

$report->run()
->cloudExport("MyReportPDF")
->khtml("token-key")
->pdf($khtmlPDFOption)
->toBrowser("myreport.pdf");

$report->run()
->cloudExport("MyReportPDF")
->phantomjs("token-key")
->pdf($phantomjsPDFOption)
->toBrowser("myreport.pdf");

Headless chrome has more features but wkhtmltopdf is faster for big files. Phantomjs has the advantage of header and footer callbacks which allow for custom header/footer for each page.

Extra settings

You may add some extra settings to guide ChromeHeadless.io to load your page.

$report->run()
->cloudExport("MyReportPDF")
->chromeHeadlessio("token-key")
->settings([
    "pageWaiting"=>"load", // load, domcontentloaded, networkidle0, networkidle2
    "useLocalTempFolder" => true,
    "autoDeleteLocalTempFile" => true,
    "serviceHost" => "http://localhost:8000", // default value: https://service.chromeheadless.io
    "serviceUrl" => "http://localhost:8000/api/export",
])
->pdf($chromePDFOptions)
->toBrowser("myreport.pdf");

Name	Type	Default	Description	Available since version
`pageWaiting`	string	"load"	When to consider navigation succeeded. Other options are `"domcontentloaded"` page finished when all DOM is loaded; `"networkidle0"` page finished when there are no more than 0 network connections for at least 500 ms; `"networkidle2"` page finished when there are no more than 2 network connections for at least 500 ms.	1.0.0
`useLocalTempFolder`	boolean	false	Use/create a local temporary directory instead of system temporary directory to store temporary export files	1.0.0
`autoDeleteLocalTempFile`	boolean	false	Auto delete temporary export files after exporting	1.0.0
`serviceHost`	string	https://service.chromeheadless.io	Choose KoolReport's cloud server or your local export server	4.0.0
`serviceUrl`	string	{serviceHost}/api/export	To be used if you want another export route other than /api/export	4.0.0

Export options

PDF for headless chrome engine

The pdf() method will help to generate pdf file. It takes an array as parameter defining options for your PDF. Below are available options.

Name	Type	Default	Description
`scale`	number	1	Scale of the webpage rendering. Defaults to 1. Scale amount must be between 0.1 and 2
`displayHeaderFooter`	bool	false	Display header and footer.
`headerTemplate`	string		HTML template for the print header. Should be valid HTML markup with following classes used to inject printing values into them: `pageNumber` current page number; `totalPages` total pages in the document;
`footerTemplate`	string		HTML template for the print footer. Should use the same format as the `headerTemplate`
`printBackground`	bool	false	Print background graphics.
`landscape`	bool	false	Paper orientation.
`pageRanges`	string		Paper ranges to print, e.g., '1-5, 8, 11-13'. Defaults to the empty string, which means print all pages.
`format`	string		Paper format. If set, takes priority over width or height options. Defaults to 'Letter'.
`width`	string/number		Paper width, accepts values labeled with units.
`height`	string/number		Paper height, accepts values labeled with units.
`margin`	object		Paper margins, defaults to none. It has 4 sub properties: `top`, `right`, `bottom`, `left` which can take number or string with units

All options could be found at this link Headless Chrome pdf options

Example:

...
->pdf([
    "scale"=>1,
    "format"=>"A4",
    "landscape"=>true
])
...

PDF for wkhtmltopdf engine

All options could be found at this link, section Global Options Wkhtmltopdf Docs

Example:

...
->pdf([
    "--collate"=>true,
    "--page-size"=>"A4",
    "--orientation"=>"Landscape",
    "--margin-top"=>"100px"
])
...

PDF options in view file for both headless chrome and wkhtmltopdf engines

Some pdf options could be set directly in the PDF view file instead of pdf() method.

header and footer

In the view file, use header and footer tags to set pdf's header and footer template:

Example:

<!-- Headless chrome pdf template -->
<header>
    <div id="header-template" 
        style="font-size:10px !important; color:#808080; padding-left:10px">
        <span>Header: </span>
        {date}
        {title}
        {url}
        {pageNumber}
        {totalPages}
        <span id='pageNum' class="pageNumber"></span>
        <img src='http://www.chromium.org/_/rsrc/1438879449147/config/customLogo.gif?revision=3' />
    </div>
</header>
<footer>
...
</footer>

Headless chrome: If either header or footer tag exists, pdf options' displayHeaderFooter will be true. PDF options' headerTemplate and footerTemplate options take priority over view file's header and footer tags. With header and footer tags, if there's no font-size style, a default style "font-size:10x" is used. Header and footer tags supports place holders like {date}, {title}, etc and img tag with link-type src. For img tag pdf options' headerTemplate and footerTemplate only support base64-type src.

<!-- Wkhtmltopdf pdf template -->
<header>
    <div>
        {page}{frompage}{topage}{webpage}{section}{subsection}{date}{isodate}{time}{title}{doctitle}{sitepage}{sitepages}
    </div>
</header>
<footer>
...
</footer>

Wkhtmltopdf: The exact html content of the header and footer tags including img tags will be used as pdf header and footer with some substituted variables.

margin

In the view file, use the body tag's margin style to set pdf margin:

Example:

//MyReportPDF.view.php
<body style='margin: 1in 0.5in 1in 0.5in'>
...
</body>

If either header or footer tag exists but there's no body's margin top or bottom, a default margin top or bottom of 1 inch will be used

No template option

If you don't have any header/footer/margin in your template files, you could speed up pdf generating with noTemplateOption property:

...
->pdf([
    "noTemplateOption"=>true,
    ...
])
...

JPG for headless chrome

The jpg() help to generate JPG file. It take an array as parameter defining options for your JPG. Below are list of properties:

Name	Type	Default	Description
`quality`	number		The quality of the image, between 0-100.
`fullPage`	bool	false	When true, takes a screenshot of the full scrollable page.
`clip`	object		An object which specifies clipping region of the page. Should have the following fields: `x` is the x-coordinate of top-left corner of clip area, `y` is y-coordinate of top-left corner of clip area, `width` is the width of clipping area and `height` is the height of clipping area.
`omitBackground`	bool	false	Hides default white background and allows capturing screenshots with transparency.
`encoding`	string	"binary"	The encoding of the image, can be either `base64` or `binary`

Example:

...
->jpg([
    "quality"=>80
    "clip"=>[
        "x"=>100,
        "y"=>100,
        "width"=>500,
        "height"=>1000,
    ]
])
...

PNG for headless chrome

The png() help to generate PNG file. It take an array as parameter defining options for your PNG. Below are list of properties:

Name	Type	Default	Description
`fullPage`	bool	false	When true, takes a screenshot of the full scrollable page.
`clip`	object		An object which specifies clipping region of the page. Should have the following fields: `x` is the x-coordinate of top-left corner of clip area, `y` is y-coordinate of top-left corner of clip area, `width` is the width of clipping area and `height` is the height of clipping area.
`omitBackground`	bool	false	Hides default white background and allows capturing screenshots with transparency.
`encoding`	string	"binary"	The encoding of the image, can be either `base64` or `binary`

Example:

...
->png([
    "clip"=>[
        "x"=>100,
        "y"=>100,
        "width"=>500,
        "height"=>1000,
    ]
])
...

Get results

In all above examples we use method toBrowser() to send the file to browser for user to download. Here are all options:

Method	Return	Description
`toBrowser($filename,$openOnBrowser)`		Force user to download file or open the file on browser if `$openOnBrowser` is set to `true`
`toString()`	string	Return filename as string
`toBase64()`	string	Return content of file in base64
`saveAs($path)`		Save the file to specific location

Examples:

$report->run()
->cloudExport("MyReportPDF")
->chromeHeadlessio("token-key")
->pdf()
->saveAs("../stores/myreport.pdf");

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README.md

README.md

Introduction

Installation

By downloading .zip file

By composer

ChromeHeadless.io

Overview

Get Token Key

Example

Export engines

Extra settings

Export options

PDF for headless chrome engine

PDF for wkhtmltopdf engine

PDF options in view file for both headless chrome and wkhtmltopdf engines

header and footer

margin

No template option

JPG for headless chrome

PNG for headless chrome

Get results

Files

README.md

Latest commit

History

README.md

File metadata and controls

Introduction

Installation

By downloading .zip file

By composer

ChromeHeadless.io

Overview

Get Token Key

Example

Export engines

Extra settings

Export options

PDF for headless chrome engine

PDF for wkhtmltopdf engine

PDF options in view file for both headless chrome and wkhtmltopdf engines

header and footer

margin

No template option

JPG for headless chrome

PNG for headless chrome

Get results