Prebid Outstream Renderer

A free and open source library for publishers to quickly implement outstream renderer.

This README is for developers who want to use this project to implement outstream renderer.

Table of Contents

• Usage
• Install
• Development Build
• Production Build
• Run

Usage (as a npm dependency)

Prebid.js requires an outstream renderer URL in renderer.url object and outstream configuration object in renderer.render object.

renderer: {
    url: 'bundle.js',   // URL of the renderer
    render: function (bid) {
        bid.renderer.push(function() {
            try {
                // Object to configure the behaviour of outstream renderer from HTML page.
                var obj = {
                    width: 640,
                    height: 480,
                    vastTimeout: 5000,
                    maxAllowedVastTagRedirects: 3,
                    allowVpaid: false,
                    autoPlay: true,
                    preload: true,
                    mute: false,
                    adText: 'This is sample adtext.'
                }
                // Call to Global object of renderer.
                // Takes bid, element ID and configuration object as parameters
                window.outstreamPlayer.player(bid, 'video1', obj);
            } catch (e) {
                console.error(e);
                console.error("Error in ad rendering!");
            }
        })
    }
}       

Outstream renderer can be invoked by calling window.outstreamPlayer() function. This function takes three parameters namely bid object, Element ID where we want to insert the outstream player and an optional configuration object. Outstream renderer will throw an error, if bid object and/or element ID are not provided or an invalid value is provided.

The project allows the user to provide configuration at two levels:

1. Build time.
2. Runtime.

Build Time Configuration

To provide the configuration at build time use the .env.development and env.production files for development and production modes respectively. Some of the available options are:

Base Player

This project allows user to select the base player of his choice from the available player list. If your favourite player is not available in the supported player list and you are interested in contributing to the project to provide its support, then please refer the document How to add a new player support.

The user needs to provide his selected player in SELECTED_PLAYER environment variable from the given supported player list.

Supported Players

• FLUID_PLAYER - Fluid player
• VIDEO_JS - Video JS

Note 1: At present, we only fully support Fluid player as Video JS player is not fully implemented. We are looking for your help in adding support to other major players.

Note 2: By default, we are choosing Fluid player as the base player for outstream renderer.

Runtime Configuration

User can provide some configurations to the outstream player on runtime while calling the global function window.outstreamPlayer(). The supported parameters for this are defined in GenericConfiguration class. At present, the following configurations are supported:

• width - Width in pixels. (Default: 640)
• height - Height in pixels. (Default: 480)
• vastTimeout - Time, in milliseconds, to wait for the VAST to load. (Default: 5000)
• maxAllowedVastTagRedirects - Maximum allowed redirects (wrappers). (Default: 3)
• allowVpaid - To enable loading VPAID ads allowVPAID option has to be set to true (false by default).
• autoPlay - When set to true the video will play automatically when the page loads. Please note that this feature may not work on certain browser versions and depends on their AutoPlay Policies. (Default: true)
• preload - Sets the preload parameter on video tag. (Default: true)
• mute - Set this parameter to true to have the video muted by default. (Default: true)
• adText - To set the custom text when an in-stream ad plays. (Default: '' - an empty string)

Note 1: Providig these parameters is completely optional, in which case we will use there default values.

Note 2: While providing custom values to above parameters, please make sure to provide these values with proper datatype otherwise default values will be used.

Install

$ git clone https://github.com/prebid/prebid-outstream.git
$ cd prebid-outstream
$ npm install

Note: You need to have NodeJS 12.16.1 or greater installed.

Build for Development

To build the project on your local machine, run:

$ npm run start

This runs some code quality checks, starts a web server at http://localhost:8082/ serving from the project root. We can use .env.development file to configure the behaviour.

The SELECTED_PLAYER environment variable in the .env.development file is used to select the base player for the outstream renderer.

Build for Production

To build the project on your local machine, run:

$ npm run build

This runs some code quality checks, and builds the project in the project's root ./dist/ folder. ./dist/bundle.js is the final minified file which needs to be hosted and whose URL should be provided in the renderer.url field.

We can use .env.production file to configure the behaviour of the final build. The SELECTED_PLAYER environment variable from the .env.production file is used to select the base player for the outstream renderer.

Test locally

To run the unit tests:

npm run test

To generate and view the code coverage reports:

npm run coverage

To generate and view the bundle analyzer and visualizer reports:

npm run build-analyze

By default, console logs will be disabled. To enable console logs for the project pass an integer value between 0 to 5 in playerDebugLevel Query param. Significance, of each value of playerDebugLevel Query param is as follows:

playerDebugLevel	Significance
Query param not present.	No logging
null/undefined/NaN	No logging
0	No logging
1	Will log info level logs.
2	Will log info and error level logs.
3	Will log info, error and warn level logs.
4	Will log info, error, warn and debug level logs.
>5	Will log info, error, warn, debug and log level logs.
Any other invalid value.	No logging