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Splitting a Facebook event calendar

Node-RED is a flow-based programming tool, originally developed by IBM’s Emerging Technology Services team and now a part of the JS Foundation. My friends make liberal use of Facebook events, unfortunately I find the events interface impossible to navigate. Luckily they do have a .ics available, unluckily events you haven't accepted are mixed with events you have.

So I made a simple flow that splits accepted events from tentative events. This way I can subscribe to this .ics in my Nextcloud instance and give tentative events a different color. I find a calendar is much more usable.

I used the node-red-contrib-httpauth node. The main bit is contained in a function node, mainly because I couldn't figure out how to sanely do this with the split node.

Use is simple:

  1. Update the http auth node with your preferred user:pasword
  2. Add your facebook event calendar url to the http request node
  3. subscribe to user:[email protected]/nod-red/facebook/accepted or user:[email protected]/nod-red/facebook/tentative

[{"id":"30abd373.bd5524","type":"http in","z":"ce798f74.64a9d8","name":"","url":"/facebook/:request","method":"get","upload":false,"swaggerDoc":"","x":160,"y":300,"wires":[["77e1feab.382658"]]},{"id":"705a7847.bc5d","type":"debug","z":"ce798f74.64a9d8","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":430,"y":400,"wires":[]},{"id":"77e1feab.382658","type":"node-red-contrib-httpauth","z":"ce798f74.64a9d8","name":"","file":"","cred":"","authType":"Basic","realm":"","username":"","password":"","hashed":false,"x":240,"y":340,"wires":[["116bd38e.4b7dcc","705a7847.bc5d"]]},{"id":"e1172439.6bf4b8","type":"comment","z":"ce798f74.64a9d8","name":"Secure with Basic Auth","info":"","x":200,"y":380,"wires":[]},{"id":"116bd38e.4b7dcc","type":"switch","z":"ce798f74.64a9d8","name":"","property":"req.params.request","propertyType":"msg","rules":[{"t":"eq","v":"accepted","vt":"str"},{"t":"eq","v":"tentative","vt":"str"},{"t":"else"}],"checkall":"true","repair":false,"outputs":3,"x":430,"y":300,"wires":[["eaff2195.a68b38"],["eaff2195.a68b38"],["83c3be58.0fc9a8"]]},{"id":"4d794bb0.d8ef74","type":"function","z":"ce798f74.64a9d8","name":"Split Calendar","func":"msg.payload = msg.payload.toString('utf8');\nmsg.payload = msg.payload.replace(\"END:VCALENDAR\", \"\");\nmsg.payload = msg.payload.split(/(?=BEGIN:VEVENT)/g);\nmsg.calendar = msg.payload[0];\n\nmsg.payload.forEach(function(part, index){\n   if (part.includes(\"PARTSTAT:ACCEPTED\") && (msg.req.params.request == \"accepted\")){\n       msg.calendar += part;\n   } else if (part.includes(\"PARTSTAT:TENTATIVE\") && (msg.req.params.request == \"tentative\") ){\n       msg.calendar += part;\n   }\n});\n\nmsg.calendar += \"END:VCALENDAR\";\nreturn msg;","outputs":2,"noerr":0,"x":1000,"y":300,"wires":[["6b67410a.701ab"],[]]},{"id":"13bdf419.e491ec","type":"http request","z":"ce798f74.64a9d8","name":"","method":"GET","ret":"bin","paytoqs":false,"url":"","tls":"","proxy":"","authType":"","x":830,"y":300,"wires":[["4d794bb0.d8ef74"]]},{"id":"ab19b6e9.4b1ed8","type":"comment","z":"ce798f74.64a9d8","name":"Facebook event calendar URL","info":"","x":890,"y":340,"wires":[]},{"id":"83c3be58.0fc9a8","type":"http response","z":"ce798f74.64a9d8","name":"404","statusCode":"404","headers":{},"x":430,"y":360,"wires":[]},{"id":"6b67410a.701ab","type":"change","z":"ce798f74.64a9d8","name":"","rules":[{"t":"move","p":"calendar","pt":"msg","to":"payload","tot":"msg"},{"t":"set","p":"headers['content-type']","pt":"msg","to":"text/calendar","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":1180,"y":300,"wires":[["d1e9086f.645b78"]]},{"id":"d1e9086f.645b78","type":"http response","z":"ce798f74.64a9d8","name":"Return","statusCode":"200","headers":{},"x":1330,"y":300,"wires":[]},{"id":"eaff2195.a68b38","type":"change","z":"ce798f74.64a9d8","name":"Set Browser User Agent","rules":[{"t":"set","p":"headers.User-Agent","pt":"msg","to":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:73.0) Gecko/20100101 Firefox/73.0","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":630,"y":300,"wires":[["13bdf419.e491ec"]]}]

Docker Volume Backups

DOCKER

Backups are always an issue. I plan to switch to ZFS for the snapshotting and remote sync features, until then I have take the useful volume-backup and broken it until it works with rdiff-backup

Build the container

First you have to clone the repo and build the container

git clone https://github.com/dugite-code/volume-backup.git
cd volume-backup
docker image build -t vbackup:1.0 .

Backup

Now you can run the container mounting the [volume-name] at /volume and your [backup-dir] at /backup

docker run -v [volume-name]:/volume -v [backup-dir]:/backup --rm vbackup:1.0 backup

Additional rdiff-backup options and be passed via the -o switch and a quoted option for example -o "--exclude ignore.me"

Restore

To restore you must supply some form of options i.e. -o "-r 10D" or restore backup from 10 Days ago

docker run -v [volume-name]:/volume -v [backup-dir]:/backup --rm vbackup:1.0 restore -o "-r 10D"

Trimming old files

With incremental backups it's important to occasionally trim old files that just don't exist anymore. Like Restore you must provide some form of option.

Prior to doing a backup I will run this command to remove files older than 20 Backups

docker run -v [backup-dir]:/backup --rm vbackup:1.0 remote -v -o "--remove-older-than 20B"

I hope you found this helpful. It's not a very clean script, I had to hack apart the reference script quite a bit in order to get it all working. But it serves it's purpose quite well.


Migrating Nextcloud to Docker

I migrated from mariadb to postgres. All my other containers use postgres so I felt it would be better for my maintenance needs to have everything on postgres.

docker-compose.yaml

version: '2'

services:
  db:
    image: postgres:alpine
    restart: always
    ports:
      - 127.0.0.1:5432
    volumes:
      - db:/var/lib/postgresql/data
    env_file:
      - db.env

  app:
    image: nextcloud:apache
    restart: always
    ports:
      - 8080:80
    volumes:
      - nextcloud:/var/www/html
    environment:
      - POSTGRES_HOST=db
    env_file:
      - db.env
    depends_on:
      - db

volumes:
  db:
  nextcloud:

db.env

POSTGRES_PASSWORD=my-super-good-password
POSTGRES_DB=nextclouddb
POSTGRES_USER=nextcloud
docker-compose up -d

sudo -u www-data php occ db:convert-type --all-apps --password "my-super-good-password" pgsql nextcloud localhost nextclouddb

sudo docker-compose exec --user www-data app php /var/www/html/occ upgrade


I am a Docker Convert

DOCKER

I've changed my mind quite a bit when it comes to docker. I used to be a big believer in virtual machines, I still am, but for individual "applications" Docker makes a fair bit of sense.

Reasons to I use Docker

Simplicity

Docker is the simplest way to replicate a developer's environment on your own computer. No more dealing with differing distro's varying update cycles and the conflicting packages causing edge case issues, because everything is in it's own little box. Nice and predictable.

This saves you time setting things up because at least all the components are included. Configuration is still a pain on some projects, but at least your not missing any metaphorical screws.

The biggest example for this was my mailserver. I used modoboa a great simple mailserver package. The issues were having things brake from system package updates and just updating the package itself was damned complicated. I learnt a lot from these breakages, so much so when I switched to docker I switched to using docker-mailserver a image that has no Web GUI for configuration.

Updates, while problematic to monitor in docker are now a simple painless affair.

Lightweight

Unlike a virtual machine you don't need to replicate everything in a container. This makes it easier to have more services that conflict with each other running side by side. I used to have one dedicated NUC for my mailserver and another for all my other services. I've now condensed it all onto the single NUC with better overall performance thanks to docker.

Portability

One of the biggest advantages to docker is portability. If you take your raw data and docker-compose files throw them onto a completely separate machine and within a few minutes you are up and running again. For virtual machines this would take significant work and, in my experience often fails.

The Issues I have with docker

The pre-built images

The Alpine image root issue last year, where the base image used to build a large number of docker images shipped with a vulnerability, made it obvious you need an actively maintained update cycle.

If the project you are using doesn't provide a docker image or even a dockerfile you will often find pre-built images on docker-hub. The big question you need to ask is if you can trust these images. Check the source repository and decide if it would make more sense to build the image yourself.

Keeping pre-built images up-to date

One of the biggest issues people have with docker is the lack of update tracking. Thankfully this can be overcome using the Watchtower image.

I set watchtower to monitor only mode because automatic updates are sometimes a terrible idea.

watchtower:
    image: containrrr/watchtower
    container_name: watchtower
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: unless-stopped
    environment:
      - WATCHTOWER_POLL_INTERVAL=86400 #Poll every 24 hours
      - WATCHTOWER_MONITOR_ONLY=true
      - WATCHTOWER_NOTIFICATIONS=gotify
      - WATCHTOWER_NOTIFICATION_GOTIFY_URL=https://example.tld/gotify/
      - WATCHTOWER_NOTIFICATION_GOTIFY_TOKEN=###########

Importantly for locally built images add the disable label to their docker-compose files, or you will constantly get notifications saying (info): Unable to update container /examplecontainer. Proceeding to next.

  labels:
   - com.centurylinklabs.watchtower.enable=false

FeedIron Updated

FeedIron, Reforge your feedsI've done another major update for the TT-RSS plugin FeedIron. This update is mostly structural changes as I'm trying to Modularize things and reduce the amount of spaghetti code.

However I have moved the community submitted recipes to a separate repository. As the plugin uses the Github API this will affect current and old versions of the plugin once I fully remove the recipes from the main repo. I plan to do this early next year.

You will either need to update or edit the following line in RecipeManager.php

private $recipes_location = array(array("url"=>"https://api.github.com/repos/m42e/ttrss_plugin-feediron/contents/recipes", "branch"=>"master"), array("url"=>"https://api.github.com/repos/mbirth/ttrss_plugin-af_feedmod/contents/mods", "branch"=>"master"));

with

private $recipes_location = array(array("url"=>"https://api.github.com/repos/feediron/feediron-recipes/contents/general", "branch"=>"master"), array("url"=>"https://api.github.com/repos/mbirth/ttrss_plugin-af_feedmod/contents/mods", "branch"=>"master"));

Given that I'm still a hobbyist coder I'm hoping I haven't made too many mistakes. As always I encourage pull requests and any feedback


Node-Red Website Alerts

Node-RED is a flow-based programming tool, originally developed by IBM’s Emerging Technology Services team and now a part of the JS Foundation. A recent question on /r/selfhosted about what selfhosted service you are missing sparked my interest. A user by the name forthedatahorde mentioned they wanted the ability to monitor arbitrary websites. I figured Node-Red is just the tool to comfortably fill this gap.

I made two options. One using readability.js for a bit of a generic solution and one using css selectors for more targeted watching needs.

The Readability.js Version:

  1. Fetches the site with a HTTP get request.

  2. Runs it through readability.js

  3. Hashes the text

  4. Compares it with an old hash

  5. Emails the change

Required the packages node-red-contrib-md5 and node-red-contrib-readability

image03

[{"id":"c8beb17e.4513c8","type":"http request","z":"1a1be165.968ed7","name":"","method":"GET","ret":"txt","paytoqs":false,"url":"","tls":"","proxy":"","authType":"","x":310,"y":100,"wires":[["8a94f0a4.a1f488"]]},{"id":"ae660213.061188","type":"readability","z":"1a1be165.968ed7","name":"","x":310,"y":180,"wires":[["597a982a.8c9bb"]]},{"id":"8a94f0a4.a1f488","type":"switch","z":"1a1be165.968ed7","name":"","property":"statusCode","propertyType":"msg","rules":[{"t":"eq","v":"200","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":290,"y":140,"wires":[["ae660213.061188"]]},{"id":"c361fc4a.44f6b8","type":"change","z":"1a1be165.968ed7","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"payload.content","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":500,"y":300,"wires":[["4e96af67.1febe"]]},{"id":"597a982a.8c9bb","type":"md5","z":"1a1be165.968ed7","name":"","fieldToHash":"payload.text","fieldTypeToHash":"msg","hashField":"md5","hashFieldType":"msg","x":470,"y":140,"wires":[["8e8bc713.5693f"]]},{"id":"ed8cd02.da0d03","type":"switch","z":"1a1be165.968ed7","name":"","property":"md5","propertyType":"msg","rules":[{"t":"neq","v":"old_hash","vt":"msg"}],"checkall":"true","repair":false,"outputs":1,"x":610,"y":180,"wires":[["d52d318b.d1ac58"]]},{"id":"5cfa0e17.f15bf","type":"change","z":"1a1be165.968ed7","name":"","rules":[{"t":"set","p":"url","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":310,"y":60,"wires":[["c8beb17e.4513c8"]]},{"id":"4ab25748.add748","type":"change","z":"1a1be165.968ed7","name":"","rules":[{"t":"set","p":"topic","pt":"msg","to":"url","tot":"msg"},{"t":"change","p":"topic","pt":"msg","from":"^(.*)$","fromt":"re","to":"Update to $1 detected","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":500,"y":260,"wires":[["c361fc4a.44f6b8"]]},{"id":"4e96af67.1febe","type":"e-mail","z":"1a1be165.968ed7","server":"smtp.gmail.com","port":"465","secure":true,"tls":true,"name":"","dname":"","x":690,"y":300,"wires":[]},{"id":"b7b6adc.1b5c3d","type":"inject","z":"1a1be165.968ed7","name":"rammstein.de","topic":"","payload":"https://www.rammstein.de/de/","payloadType":"str","repeat":"21600","crontab":"","once":false,"onceDelay":0.1,"x":120,"y":60,"wires":[["5cfa0e17.f15bf"]]},{"id":"8e8bc713.5693f","type":"function","z":"1a1be165.968ed7","name":"Get Hash","func":"try{\n    msg.old_hash = flow.get(msg.url);\n} catch(e) {\n    msg.old_hash = \"0\";\n}\nreturn msg;","outputs":1,"noerr":0,"x":620,"y":140,"wires":[["ed8cd02.da0d03"]]},{"id":"d52d318b.d1ac58","type":"function","z":"1a1be165.968ed7","name":"Set Hash","func":"flow.set(msg.url, msg.md5);\nreturn msg;","outputs":1,"noerr":0,"x":480,"y":220,"wires":[["4ab25748.add748"]]}]

The CSS Selector Version:

  1. Fetches the site with a HTTP get request.

  2. Filters the resulting HTML with a css selector

  3. Hashes the html

  4. Compares it with an old hash

  5. Emails the change

Required the packages node-red-contrib-md5

image02

[{"id":"c8beb17e.4513c8","type":"http request","z":"1a1be165.968ed7","name":"","method":"GET","ret":"txt","paytoqs":false,"url":"","tls":"","proxy":"","authType":"","x":350,"y":160,"wires":[["8a94f0a4.a1f488"]]},{"id":"8a94f0a4.a1f488","type":"switch","z":"1a1be165.968ed7","name":"","property":"statusCode","propertyType":"msg","rules":[{"t":"eq","v":"200","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":330,"y":200,"wires":[["28487abf.9cf7be"]]},{"id":"597a982a.8c9bb","type":"md5","z":"1a1be165.968ed7","name":"","fieldToHash":"payload","fieldTypeToHash":"msg","hashField":"md5","hashFieldType":"msg","x":330,"y":280,"wires":[["8e8bc713.5693f"]]},{"id":"ed8cd02.da0d03","type":"switch","z":"1a1be165.968ed7","name":"","property":"md5","propertyType":"msg","rules":[{"t":"neq","v":"old_hash","vt":"msg"}],"checkall":"true","repair":false,"outputs":1,"x":330,"y":360,"wires":[["d52d318b.d1ac58"]]},{"id":"5cfa0e17.f15bf","type":"change","z":"1a1be165.968ed7","name":"","rules":[{"t":"set","p":"url","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":350,"y":120,"wires":[["c8beb17e.4513c8"]]},{"id":"4ab25748.add748","type":"change","z":"1a1be165.968ed7","name":"","rules":[{"t":"set","p":"topic","pt":"msg","to":"url","tot":"msg"},{"t":"change","p":"topic","pt":"msg","from":"^(.*)$","fromt":"re","to":"Update to $1 detected","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":520,"y":400,"wires":[["9a394414.9956a"]]},{"id":"b7b6adc.1b5c3d","type":"inject","z":"1a1be165.968ed7","name":"rammstein.de","topic":"","payload":"https://www.rammstein.de/de/","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":110,"y":80,"wires":[["6500331b.56333c"]]},{"id":"8e8bc713.5693f","type":"function","z":"1a1be165.968ed7","name":"Get Hash","func":"try{\n    msg.old_hash = flow.get(msg.url);\n} catch(e) {\n    msg.old_hash = \"0\";\n}\nreturn msg;","outputs":1,"noerr":0,"x":340,"y":320,"wires":[["ed8cd02.da0d03"]]},{"id":"d52d318b.d1ac58","type":"function","z":"1a1be165.968ed7","name":"Set Hash","func":"flow.set(msg.url, msg.md5);\nreturn msg;","outputs":1,"noerr":0,"x":500,"y":360,"wires":[["4ab25748.add748"]]},{"id":"28487abf.9cf7be","type":"html","z":"1a1be165.968ed7","name":"","property":"payload","outproperty":"payload","tag":"","ret":"html","as":"single","x":330,"y":240,"wires":[["b8739927.661e18"]]},{"id":"6500331b.56333c","type":"change","z":"1a1be165.968ed7","name":"Selector css","rules":[{"t":"set","p":"select","pt":"msg","to":".resume-view-news","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":110,"y":120,"wires":[["5cfa0e17.f15bf"]]},{"id":"b8739927.661e18","type":"change","z":"1a1be165.968ed7","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"payload[0]","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":520,"y":240,"wires":[["597a982a.8c9bb"]]},{"id":"9a394414.9956a","type":"e-mail","z":"1a1be165.968ed7","server":"smtp.gmail.com","port":"465","secure":true,"tls":true,"name":"","dname":"","x":710,"y":400,"wires":[]}]

I hope someone finds this helpful/interesting. Let me know if you have a better solution in the comments down below.


Nextcry and Nextcloud security

About a month ago there was an urgent security notice from the Nexcloud devs regarding a flaw in Nginx php-fpm and the associated Nextcloud config. Unfortunately we are now seeing it being exploited in the wild.

The Nextcloud devs have confirmed that it doesn't appear to be an issue with Nextcloud itself and that patching and updating is highly advised.

This brings to mind some extra security measures I do for Nextcloud on top of my standard server checklist

Have extra security advice? Let me know in the comments down below!


Need new Lookout Maintainer

I'm currently seeking a new maintainer for the Lookout (fix version) add-on for Thunderbird.

It looks like I won't be supporting Thunderbird for much longer and instead will be stuck supporting Outlook again. This means my development time will be severely limited and with the recent move to drop legacy add-on support I'm afraid I won't be able to keep up.

If you are interested in development let me know either in the comments below, through the email [email protected] or ideally opening a pull request with code changes to the github repository


App Passwords for docker-mailserver

Recently I got rid of my virtual IPFire firewall and setup a Netgate SG1100 as my home firewall. I did this mainly because the NIC on the IPFire host NUC was starting to fail, also we use Pfsense at work and it's good to be able to tinker on a common platform. As my email server was virtualized on the same host NUC as my firewall I switched my virtual modoboa email server install to the docker-mailserver project. This makes my mail server more portable than the old virtual machine was.

I then setup app specific passwords for my email following this guide Below is the changes I needed to do for the docker image.

Adding this to the docker-mailserver docker-compose.yml

    volumes:
    ###################################
    #### Dovecot App Passwords Mod ####
    ###################################
    - /opt/mail/custom/dovecot/10-auth.conf:/etc/dovecot/conf.d/10-auth.conf:ro
    - /opt/mail/custom/dovecot/auth-appspecificpasswd.conf.ext:/etc/dovecot/conf.d/auth-appspecificpasswd.conf.ext:ro
    - /opt/mail/custom/dovecot/app_specific_passwd:/etc/dovecot/app_specific_passwd:ro

The /opt/mail/custom/dovecot/10-auth.conf file

auth_mechanisms = plain login
!include auth-passwdfile.inc
!include auth-appspecificpasswd.conf.ext

The /opt/mail/custom/dovecot/auth-appspecificpasswd.conf.ext file

passdb {

  driver = passwd-file

  args = scheme=SHA512-CRYPT username_format=%u /etc/dovecot/app_specific_passwd

}

The /opt/mail/custom/dovecot/app_specific_passwd file (example)

K9emaillapp:{SHA512-CRYPT}123456789...::::::user=foo

Assuming your docker-mailserver is called mail you can get the format you passwords for the app_specific_passwd file by using:

docker exec -it mail doveadm pw -s SHA512-CRYPT

You can now user the username K9emaillapp and the associated password to log in to your email account


Fixing a Patreon feed's cover artwork

Antennapod With the recent Pocketcast PR blunder I finally decided to jump back to open source Antennapod. This has been painless especially with the introduction of the Remove silence feature, the main feature that kept me with Pocketcasts for so long.

The only issue I had was a Private feed with broken cover artwork, this was frustrating but it looks to be an issue on Patreons end. Thankfully Node Red is available to rescue the situation!

The flow is really simple, the only additional node I have added is the node-red-contrib-httpauth.

  1. On a HTTP request, fetch the RSS feed.
  2. Convert from XML to and Object.
  3. Replace msg.payload.rss.channel[0].image[0].url[0] with a good url from the podcasters website.
  4. Create the txt/xml headers
  5. Return the fixed RSS Feed

Node-Red Flow

[{"id":"8d2a4ad1.4599a","type":"http request","z":"d437ad18.0999c","name":"","method":"GET","ret":"txt","paytoqs":false,"url":"https://www.patreon.com/rss/yaddayada","tls":"","proxy":"","authType":"","x":367.5,"y":31,"wires":[["4c5cdedd.6772c8"]]},{"id":"4c5cdedd.6772c8","type":"xml","z":"d437ad18.0999c","name":"XML To Object","property":"payload","attr":"","chr":"","x":230.5,"y":78,"wires":[["adbd8c2e.7fbcd"]]},{"id":"7475a34e.9f953c","type":"http in","z":"d437ad18.0999c","name":"rss","url":"/mystupidRSS","method":"get","upload":false,"swaggerDoc":"","x":69.5,"y":31,"wires":[["26c3aede.f41d4a"]]},{"id":"26c3aede.f41d4a","type":"node-red-contrib-httpauth","z":"d437ad18.0999c","name":"","file":"","cred":"","authType":"Basic","realm":"","username":"","password":"","hashed":false,"x":213.5,"y":31,"wires":[["8d2a4ad1.4599a"]]},{"id":"56731f49.b7f77","type":"xml","z":"d437ad18.0999c","name":"Object to XML","property":"payload","attr":"","chr":"","x":647.5,"y":79,"wires":[["5aa22446.612044"]]},{"id":"5aa22446.612044","type":"change","z":"d437ad18.0999c","name":"Set Headers","rules":[{"t":"set","p":"headers","pt":"msg","to":"{}","tot":"json"},{"t":"set","p":"headers.content-type","pt":"msg","to":"text/xml","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":219,"y":131,"wires":[["8df07127.e9d0c8"]]},{"id":"8df07127.e9d0c8","type":"http response","z":"d437ad18.0999c","name":"","statusCode":"","headers":{},"x":391,"y":131,"wires":[]},{"id":"adbd8c2e.7fbcd","type":"change","z":"d437ad18.0999c","name":"Replace Cover Image","rules":[{"t":"set","p":"payload.rss.channel[0].image[0].url[0]","pt":"msg","to":"https://example.com/cover_art.png","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":440.5,"y":79,"wires":[["56731f49.b7f77"]]}]