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How to create new RTD submodule (#2268)
* auction delay and timeout * RTD docs * testing ability to make commits * review revisions * changing getData to addTargeting * revised for phase 3 * removing auctionId param from callback * added display name to browsi Co-authored-by: bretg <bgorsline@gmail.com>
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--- | ||
layout: page_v2 | ||
title: How to Add a Prebid.js RTD submodule | ||
description: How to Add a Prebid.js RTD submodule | ||
sidebarType: 1 | ||
--- | ||
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# How to Add a Real Time Data Submodule | ||
{:.no_toc} | ||
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Sub-modules interact with the Real-Time Data (RTD) core module to | ||
add data to bid requests or add targeting values for the primary ad server. | ||
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* TOC | ||
{:toc } | ||
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## Overview | ||
1. RTD module is a generic core module, allowing sub-modules to register and use it to modify bid request/response and set targeting data for the publisher’s ad server. | ||
2. This is done using hooks (with optional auction delay) and events. | ||
3. Publishers will decide which RTD sub-modules they want to use, and can set parameters like timeout, endpoints, etc. | ||
4. Sub-module functions are invoked by the RTD core module. | ||
5. As a rule, sub-modules should delay the auction as little as possible. | ||
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## Architecture | ||
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The RTD module using hooks and event listeners to genrate the flow for the data modificatios. | ||
On each step it calls the submodules to retrive the data. | ||
Here is the flow for how the RTD-core module interacts with its sub-modules: | ||
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![Prebid RTD Architecture Diagram](/assets/images/prebid-rtd-architecture.jpg){: .pb-xlg-img :} | ||
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The activities performed by the RTD-core module are on the left-hand side, while the functions | ||
that can be provided by your RTD sub-module are on the right-hand side. Note that you don't need to implement all of the functions - you'll want to plan out your functionality and develop the appropriate functions. | ||
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## Creating a Sub-Module | ||
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Working with any Prebid project requires using Github. In general, we recommend the same basic workflow for any project: | ||
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1. Fork the appropriate Prebid repository (e.g. [Prebid.js](https://github.com/prebid/Prebid.js)). | ||
2. Create a branch in your fork for your proposed code change. (e.g. feature/exRtdSProvider) | ||
3. Build and test your feature/bug fix in the branch. | ||
4. Open a [pull request](https://help.github.com/en/desktop/contributing-to-projects/creating-a-pull-request) to the appropriate repository's master branch with a good description of the feature/bug fix. | ||
5. If there's something that needs to change on the prebid.org website, follow the above steps for the [website repo](https://github.com/prebid/prebid.github.io). | ||
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{: .alert.alert-warning :} | ||
RTD sub-modules are subject to a number of specific technical rules. Please become familiar | ||
with the [module rules](/dev-docs/module-rules.html) that apply globally and to Real Time Data modules in particular. | ||
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### Step 1: Add a markdown file describing the sub-module | ||
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Create a markdown file under `modules` with the name of the module suffixed with 'RtdProvider', e.g., `exRtdProvider.md` | ||
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Example markdown file: | ||
{% highlight text %} | ||
# Overview | ||
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Module Name: Ex Rtd Provider | ||
Module Type: Rtd Provider | ||
Maintainer: prebid@example.com | ||
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# Description | ||
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RTD provider for Example.com. Contact prebid@example.com for information. | ||
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{% endhighlight %} | ||
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### Step 2: Build the Module | ||
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Now create a javascript file under `modules` with the name of the module suffixed with 'RtdProvider', e.g., `exRtdProvider.js` | ||
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#### The Sub-Module object | ||
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In order to let RTD-core know where to find the functions in your sub-module, create an object called `submoduleObj` that contains key values: | ||
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{: .table .table-bordered .table-striped } | ||
| param name | type | Scope | Description | Params | | ||
| :------------ | :------------ | :------ | :------ | :------ | | ||
| name | string | required | must match the name provided by the publisher in the on-page config | n/a | | ||
| init | function | required | defines the function that does any auction-level initialization required | config, userConsent | | ||
| getTargetingData | function | optional | defines a function that provides ad server targeting data to RTD-core | adUnitArray, config, userConsent | | ||
| getBidRequestData | function | optional | defines a function that provides ad server targeting data to RTD-core | reqBidsConfigObj, callback, config, userConsent | | ||
| onAuctionInitEvent | function | optional | listens to the AUCTION_INIT event and calls a sub-module function that lets it inspect and/or update the auction | auctionDetails, config, userConsent | | ||
| onAuctionEndEvent | function |optional | listens to the AUCTION_END event and calls a sub-module function that lets it know when auction is done | auctionDetails, config, userConsent | | ||
| onBidResponseEvent | function |optional | listens to the BID_RESPONSE event and calls a sub-module function that lets it know when a bid response has been collected | bidResponse, config, userConsent | | ||
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For example: | ||
{% highlight text %} | ||
export const subModuleObj = { | ||
name: 'ExampleRTDModule', | ||
init: init, | ||
getTargetingData: sendDataToModule | ||
}; | ||
{% endhighlight %} | ||
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#### Register the submodule | ||
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Register submodule to RTD-core: | ||
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{% highlight text %} | ||
submodule('realTimeData', subModuleObject); | ||
{% endhighlight %} | ||
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#### User Consent | ||
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Several of the interfaces get a `userConsent` object. It's an object that carries these attributes: | ||
- [gdpr](/dev-docs/modules/consentManagement.html#bidder-adapter-gdpr-integration) - GDPR | ||
- [usp](/dev-docs/modules/consentManagementUsp.html#bidder-adapter-us-privacy-integration) - US Privacy (aka CCPA) | ||
- [coppa](/dev-docs/publisher-api-reference.html#setConfig-coppa) - the Child Online Privacy Protection Act | ||
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These are provided so you can do the right thing with respect to regulations. The only privacy requirement imposed by the RTD-core is that sub-modules make make use of the StorageManager instead of attempting to access cookies or localstorage directly. | ||
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#### The init() function | ||
1. This function receives module configuration and userConsent parameters | ||
2. If the function returns `false`, the submodule will be ignored. | ||
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See the [Building the Request](/dev-docs/bidder-adaptor.html#building-the-request) section of the Bid Adapter documentation for more details about GDPR and USP. | ||
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#### getTargetingData | ||
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This is the function that will allow RTD sub-modules to merge ad server targeting data into the auction. It's called at the AUCTION_END event for each auction. | ||
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1. RTD-core will call this function with an array of adUnits, config, and userConsent as parameters | ||
2. Your sub-module should respond with per-adslot data that should be set as key values on the ad server targeting in this format: | ||
{% highlight text %} | ||
{ | ||
"slotA":{ | ||
"p":0.56, // ad server targeting variable (e.g. p) for slotA is 0.56 | ||
}, | ||
"slotB":{ | ||
"p":0.824, // ad server targeting variable (e.g. p) for slotB is 0.824 | ||
} | ||
} | ||
{% endhighlight %} | ||
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**Code Example** | ||
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{% highlight text %} | ||
/** @type {RtdSubmodule} */ | ||
export const subModuleObj = { | ||
name: 'ExampleRTDModule', | ||
init: init, | ||
getTargetingData: returnTargetingData | ||
}; | ||
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function init(config, userConsent) { | ||
// do init stuff | ||
if (initfailed) return false; | ||
return true; | ||
} | ||
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function returnTargetingData(adUnits, config, userConsent) { | ||
// do stuff | ||
return data; | ||
} | ||
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submodule('realTimeData', subModuleObj); | ||
{% endhighlight %} | ||
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#### getBidRequestData | ||
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This is the function that will allow RTD sub-modules to modify the AdUnit object for each auction. It's called as part of the requestBids hook. | ||
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1. RTD-core will call this function with: | ||
- reqBidsConfigObj: the object that's passed to [`pbjs.requestBids`](). Note that several auctions can happen concurrently, so the sub-module must be ready to support this. | ||
- callback: lets RTD-core know which auction the sub-module is done with. | ||
- config: the sub-module's config params provided by the publisher | ||
- userConsent object (see above) | ||
2. Your sub-module may update the reqBidsConfigObj and hit the callback. | ||
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**Code Example** | ||
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{% highlight text %} | ||
/** @type {RtdSubmodule} */ | ||
export const subModuleObj = { | ||
name: 'ExampleRTDModule2', | ||
init: init, | ||
setBidRequestsData: alterBidRequests | ||
}; | ||
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function init(config, userConsent) { | ||
// do init stuff | ||
if (initfailed) return false; | ||
return true; | ||
} | ||
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function alterBidRequests(reqBidsConfigObj, callback, config, userConsent) { | ||
// do stuff | ||
callback(); | ||
} | ||
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submodule('realTimeData', subModuleObj); | ||
{% endhighlight %} | ||
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#### beforeInit | ||
1. Use this function to take action to make sure data will be served as soon as possible (AJAX calls, pixels, etc..) | ||
2. This function is **not** invoked by the RTD module, and should be invoked at the bottom of the submodule. | ||
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#### Using event listeners | ||
1. The RTD-core module listens for 3 events - `AUCTION_INIT`, `AUCTION_END`, and `BID_RESPONSE`. | ||
2. Each time one of the events fires, RTD-core will invoke the corresponding function on each sub-module, allowing the sub-module to make changes to the event object. | ||
3. To use this on your sub-module, define the required functions as noted in the table above and the examples below. | ||
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**Code Example** | ||
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Here is a code example with both mandatory and optional functions: | ||
{% highlight text %} | ||
/** @type {RtdSubmodule} */ | ||
export const subModuleObj = { | ||
name: 'ExampleRTDModule3', | ||
init: init, | ||
onAuctionInitEvent: onAuctionInit, | ||
onAuctionEndEvent: onAuctionEnd, | ||
onBidResponseEvent: onBidResponse | ||
}; | ||
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function onAuctionInit(auctionDetails, config, userConsent) { | ||
// inspect/update auction details | ||
} | ||
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function onAuctionEnd(auctionDetails, config, userConsent) { | ||
// take note of auction end | ||
} | ||
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function onBidResponse(bidResponse, config, userConsent) { | ||
//optionally update bidResponse | ||
} | ||
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function init(config, userConsent) { | ||
// do init stuff | ||
if (initfailed) return false; | ||
return true; | ||
} | ||
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function beforeInit(){ | ||
//take actions to get data as soon as possible | ||
submodule('realTimeData', subModuleObj); | ||
} | ||
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beforeInit(); | ||
{% endhighlight %} | ||
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### Step 3: Add unit tests | ||
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1. Create a JS file under `test/spec/modules` with the name of the bidder suffixed with 'RtdProvider_spec', e.g., `exRtdProvider_spec.js` | ||
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2. Write great unit tests. See the other `RtdProvider_spec.js` files for examples. | ||
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### Step 4: Submit the code | ||
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Once everything looks good, submit the code, tests, and markdown as a pull request to the [Prebid.js repo](https://github.com/prebid/Prebid.js). | ||
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### Step 5: Website pull request | ||
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1. Create a fork of the [website repo](https://github.com/prebid/prebid.github.io) and a branch for your new adapter. (e.g. feature/exRtdProvider) | ||
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2. Create a new file for your RTD sub-module in dev-docs/modules/ExampleRtdProvider.md. Take a look at the other *RtdProvider.md files in that directory for the important header values. Specifically it requires the following: | ||
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``` | ||
--- | ||
layout: page_v2 | ||
title: Example Module | ||
description: Useful statement for what this does | ||
page_type: module | ||
module_type: rtd | ||
module_code : example | ||
enable_download : true | ||
sidebarType : 1 | ||
--- | ||
# Example Module | ||
[Useful publisher-facing documentation] | ||
``` | ||
3. Submit the pull request to the prebid.github.io repo. | ||
### Step 6: Wait for Prebid volunteers to review | ||
We sometimes get pretty busy, so it can take a couple of weeks for the review process to complete, so while you're waiting, consider [joining Prebid.org](https://prebid.org/membership/) to help us out with code reviews. (!) |
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