• Clone the ZappPipes.

  • Run the following command in terminal, by default the server listens on port 7000.

yarn workspace @applicaster/zapp-pipes-mock-server start


By using this feature, QA and Developers can solve issues related to the customers' feed


  • First, enable Mirroring in the App Settings:


Sniffing via Charles Proxy

  • After running the server, you can see in Charles Proxy the following:

Recording Feed

  • Enabling Mirroring means that the App always posts a copy of the JSON produced by the customer's feed

  • Each JSON is flushed into the unsaved directory:

  • In the Console Log, the Server prints the route processed and the path of captured JSON


The goal of the Proxy is to redirect a route to a JSON file instead of the real feed. The proxy feature is independent from the mirroring described above

This can be used for the following case scenarios:

  • Test a Family Cell Style's behavior upon each one of the supported feed items (videos, articles, links, images, etc)
  • Quickly solve issues related to url schemes without involving a third-party
  • Use identical feeds between Android and iOS apps
  • Use expected data for demo purposes/acceptance tests


  • First, enable Proxy in the App Settings:


Alter Route

  • Using Mirroring, we learn what's the current feed for a specific route. See in the console which route you wish to override, for example:
  "route": "reshet-first://fetchData?type=main&feedId=main_big_promoted", "path": "1524139093698.json"
  • Open file: unsaved/1524139093698.json

  • For example, before changing the feed:

  • Change the feed, for example, change the promoted image to a more geeky one

  • Save the JSON file as data/main.json (just for the sake of the example)

  • In routes.json, add a rule to redirect the route to the path of main.json

  • The rule should be created under the provider as defined in the Proxy URL Settings. See http://localhost:7000/<provider>/proxy/?url=. For example reshet-first, as shown below:

  "reshet-first": [
      "route": "reshet-first://fetchData?type=main&feedId=main_big_promoted",
      "path": "data/main.json"
  • Navigate to the section in app, see that Charles Proxy is showing a request to the proxy server which returns our custom JSON.

  • Check that all routes return Http Status Code: 404, except the one we redirected, which returns Http Status Code: (200)




  1. Make sure the Zapp-Pipes Mock Server is running on the port you want to use

  2. Check that in the App > Settings > Advanced Settings > Feed > Mirroring > Allow Mirroring is ON and points to your server. In case you're using a real device the server url should point to your IP instead of localhost.

  3. Check that in the App > Settings > Advanced Settings > Feed > Proxy > Allow Proxy is ON and points to your Server, if you're using a real device the url should point to your IP instead of localhost.

  4. If Charles Proxy is not capturing the traffic to your , check that Charles's Proxy is enabled and recording properly.

  5. When using Proxy/Mirroring from a physical device (iOS or Android), follow those instructions to connect your device thru Charles Proxy.

  6. In case your route is not intercepted, open Charles Proxy to see the HTTP request that is mirrored instead of being intercepted, then change your rule accordingly. It should appear in routes.json under the correct parent environment, such as reshet-first as appears in the App > Settings > Proxy > URL. Feel free to change the URL and point to your custom environment.


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