This module is dedicated to be used on Cloudflare, using Workers.

Installation

Prerequisites

• DATADOME_SERVER_SIDE_KEY available in your DataDome dashboard,
• DATADOME_CLIENT_SIDE_KEY available in your DataDome dashboard.

Protect your traffic

1. Connect to your Cloudflare console and go to the Workers & Pages section.

2. Click on Create application.

3. Click on Create Worker.

4. Choose a name for the Worker, for example worker/datadome.js and click on Deploy.

5. After your DataDome Worker has been deployed, click on Edit code.
6. Download our Cloudflare Module and paste the code from datadome.js in the Script Editor.

7. Fill the server-side key variable value (DATADOME_LICENSE_KEY) with the server-side key from your DataDome dashboard
8. Fill the client-side key variable value (DATADOME_JS_KEY) with the client-side key from your DataDome dashboard.
9. Click on Save and deploy.

10. Confirm by clicking on Save and deploy in the popup window.
11. Go back to the Worker overview.
12. Inside the Triggers section, add your Custom Domains and/or Routes on which you want the DataDome Worker to be set. Refer to Cloudflare documentation on Domains and Routes.

Congrats! You can now see your traffic in your DataDome dashboard.

Configuration

Configuration is done by changing DataDome variables directly inside the datadome.jsscript.

Settings

Caching policy

DataDome module doesn't change the default caching policy.

However, the module adds a tracking cookie on all requests, which may impact some custom policies.

You can use the Worker TTL feature to force a specific caching TTL.
Feel free to contact our support for any specific needs.

FAQ

Can I enable DataDome only for specified IP?

Yes, you can. You need to update the code at the beginning of the function handleRequest similarly to the below:

async function handleRequest(request) {
  try {

    if (request.headers.get('cf-connecting-ip') != "1.2.3.4" && request.headers.get('cf-connecting-ip') != "2606:4700:30::681b:938f") {
        return await fetch(request);
    }

    const url = new URL(request.url);
...

DataDome will only process requests incoming from IP 1.2.3.4 or 2606:4700:30::681b:938f.

How do I get DataDome logs using Logpush?

You can use Workers Trace Events with Logpush to send logs to a destination supported by Logpush (Datadog, Splunk, S3 Bucket…).

❗️

Logpush is available to customers on Cloudflare’s Enterprise plan.

🚧

Logging from workers is a feature that is available for workers only using version 1.14 (or later) of our module. It’s not possible to get logs from our app.

This can be done only through Cloudflare’s API.

1. Gather your credentials

• X-Auth-Email: the email address of your account
• X-Auth-Key: the value of Global API Key from My Profile → API tokens

• ACCOUNT_ID: the value of the account ID seen in the Websites Overview page

• <SERVICE_NAME>: the name of the existing service that holds the DataDome script

2. Configure Enriched Headers in DataDome Worker script

Fill the DATADOME_LOG_VALUES value with the names of Enriched Headers as an Array of Strings.

Eg:

var DATADOME_LOG_VALUES = ["X-DataDome-botname", "X-DataDome-isbot", "x-datadomeresponse"];

3. Create a Logpush job to send data to your destination

• Use the cURL command below to create a Logpush job.
  • Replace <ACCOUNT_ID>,<API_KEY>, <EMAIL> with values from step 1.
  • Set up the DESTINATION: follow the documentation here or find an example for sending logs to R2 at Cloudflare's documentation.

curl -X POST 'https://api.cloudflare.com/client/v4/accounts/<ACCOUNT_ID>/logpush/jobs' \
-H 'X-Auth-Key: <API_KEY>' \
-H 'X-Auth-Email: <EMAIL>' \
-H 'Content-Type: application/json' \
-d '{
"name": "datadome-logs",
"output_options": {
 "field_names": ["Event","EventTimestampMs","Outcome","Exceptions","Logs","ScriptName"],
 "timestamp_format": "rfc3339"
},
"destination_conf": "<DESTINATION>",
"dataset": "workers_trace_events",
"enabled": true
}'| jq .

A complete guide of available fields for each dataset can be found in Cloudflare's documentation.

4. Enable logging on DataDome Worker

• Enable logging on your DataDome Worker by adding the property logpush = true to your wrangler.toml file.

# Top-level configuration

name = "<SERVICE_NAME>"
main = "src/index.js"
compatibility_date = "2022-07-12"

workers_dev = false
logpush = true
route = { pattern = "example.org/*", zone_name = "example.org" }

An alternative is to set this property using cURL:

curl -X PUT "https://api.cloudflare.com/client/v4/accounts/<ACCOUNT_ID>/workers/scripts/<SERVICE_NAME>" \
-H 'X-Auth-Key: <API_KEY>' \
-H 'X-Auth-Email: <EMAIL>' \
--form 'metadata={"main_module": "<SERVICE_NAME>.js", "logpush": true}' \
--form '"<SERVICE_NAME>.js"=@./<SERVICE_NAME>.js;type=application/javascript+module'

5. Receive data

Enriched Headers are now sent to your Logpush destination.
The output will look like

{
   "Event":{
      "RayID":"780a1e5f7b3f2a33",
      "Request":{
         "URL":"https://mydomain.co/",
         "Method":"GET"
      },
      "Response":{
         "Status":403
      }
   },
   "EventTimestampMs":1672228648886,
   "Exceptions":[
      
   ],
   "Logs":[
      {
         "Level":"log",
         "Message":[
            "1;TestBlock;403"
         ],
         "TimestampMs":1672228648902
      }
   ],
   "ScriptName":"datadome"
}

The information sent by DataDome is a Log Message, and is composed of the values set inDATADOME_LOG_VALUES, in the same order, separated by a semi-colon.

The - is set when the value is undefined.

"Logs":[{"Level":"log","Message":["TestBlock;1;403"],"TimestampMs":1672228648902}]

How do I chain DataDome Worker with another Cloudflare Worker?

You can bind DataDome Worker with another service using Cloudflare's HTTP Service Bindings. We advise to set DataDome first to protect the traffic sooner.

DataDome Worker calls Worker B

1. Have a functioning Worker B. Script example for Worker B:

export default {
  async fetch(request, env, ctx) {
    return new Response("Hello World!");
  }
}

2. Bind your DataDome Worker to Worker B using the interface (Workers & Pages > datadome-service-name > Settings > Variables > Service Binding) or using Wrangler in the wrangler.toml file.
   1. The value of "Binding" (in this example, WORKER_B) is the value that will be used in the DataDome Worker code, see step 3.
   2. The value of "Service" (in this example, worker_b) is the name of your Worker B.

name = "worker_datadome"
main = "worker.js"
services = [
  { binding = "WORKER_B", service = "worker_b" }
]

3. Inside the DataDome Worker code, replaceactivateDataDome();with activateDataDome(globalThis.WORKER_B.fetch.bind(globalThis.WORKER_B));.
4. Remove the route from Worker B and set it to the DataDome Worker.

How do I restore the Referer request header after a challenge has been passed?

After passing a DataDome challenge on browsers other than Firefox, the referrer value is updated to the current URL which can lead to inconsistent results in website analytics.

Since version 1.18.0, it is possible to restore the Referer header to its original value for your backend:

• Contact our support team, they will review your requirements and provide you with the best recommendations.
• Set the boolean value of the DATADOME_ENABLE_REFERRER_RESTORATION option to true.