# REST API example: Create an RSS source

Here, we'll walk through an example of how to create an RSS event source and retrieve events from that source using the REST API.

Before you begin, you'll need your Pipedream API Key.

# Find the details of the source you'd like to create

To create an event source using Pipedream's REST API, you'll need two things:

  • The key that identifies the component by name
  • The props - input data - required to create the source

You can find the key by reviewing the code for the source, in Pipedream's Github repo.

In the components/ directory, you'll see a list of apps. Navigate to the app-specific directory for your source, then visit the sources/ directory in that dir to find your source. For example, to create an RSS source, visit the components/rss/sources/new-item-in-feed/new-item-in-feed.js source.

The key is a globally unique identifier for the source. You'll see the key for this source near the top of the file:

key: "rss-new-item-in-feed",

Given this key, make an API request to the /components/registry/{key} endpoint of Pipedream's REST API:

curl https://api.pipedream.com/v1/components/registry/rss-new-item-in-feed \
  -H "Authorization: Bearer XXX" -vvv \
  -H "Content-Type: application/json"

This returns information about the component, including a configurable_props section that lists the input you'll need to provide to create the source:

"configurable_props": [
  {
    "name": "rss",
    "type": "app",
    "app": "rss"
  },
  {
    "name": "url",
    "type": "string",
    "label": "Feed URL",
    "description": "Enter the URL for any public RSS feed."
  },
  {
    "name": "timer",
    "type": "$.interface.timer",
    "default": {
      "intervalSeconds": 900
    }
  }
],

In this specific case, you can ignore the rss "app" prop. The other two props — url and timer — are inputs that you can control:

  • url: the URL to the RSS feed
  • timer (optional): the frequency at which you'd like to poll the RSS feed for new items. By default, this source will poll for new items every 15 minutes.

# Creating the source

To create an RSS event source, make an HTTP POST request to the /v1/sources endpoint of Pipedream's REST API, passing the url you'd like to poll and the frequency at which you'd like to run the source in the timer object. In this example, we'll run the source once every 60 seconds.

curl https://api.pipedream.com/v1/sources \
  -H "Authorization: Bearer XXX" -vvv \
  -H "Content-Type: application/json" \
  -d '{"key": "rss-new-item-in-feed", "name": "test-rss", "configured_props": { "url": "https://rss.m.pipedream.net", "timer": { "intervalSeconds": 60 }}}'

If successful, you should get back a 200 OK response from the API with the following payload:

{
  "data": {
    "id": "dc_abc123",
    "user_id": "u_abc123",
    "component_id": "sc_abc123",
    "configured_props": {
      "url": "https://rss.m.pipedream.net",
      "timer": {
        "cron": null,
        "interval_seconds": 60
      }
    },
    "active": true,
    "created_at": 1589486978,
    "updated_at": 1589486978,
    "name": "your-name-here",
    "name_slug": "your-name-here"
  }
}

Visit https://pipedream.com/sources to see your running source. You should see the source listed on the left with the name you specified in the API request.

# Fetching new events

The RSS source polls your feed URL for items at the specified frequency. It emits new items as events of the following shape:

{
  "permalink": "https://example.com/8161",
  "guid": "https://example.com/8161",
  "title": "Example post",
  "link": "https://example.com/8161"
}

# SSE

You can subscribe to new events in real time by listening to the SSE stream tied to this source. Take the id from the API response above — dc_abc123 in our example — and make a request to this endpoint:

curl -H "Authorization: Bearer <api key>" \
  "https://api.pipedream.com/sources/dc_abc123/sse"

See the SSE docs for more detail on this interface.

# REST API

You can also fetch items in batch using the REST API. If you don't need to act on items in real time, and just need to fetch new items from the feed on a regular interval, you can fetch events like so:

curl -H "Authorization: Bearer <api key>" \
  "https://api.pipedream.com/v1/sources/dc_BVuN2Q/event_summaries"

See the docs on the /event_summaries endpoint for more details on the parameters it accepts. For example, you can pass a limit param to return only N results per page, and paginate over results using the before and after cursors described in the pagination docs.

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