Selfhosted

40198 readers

694 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

Rules:

Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.
No spam posting.
Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.
Don't duplicate the full text of your blog or github here. Just post the link for folks to click.
Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).
No trolling.

Resources:

selfh.st Newsletter and index of selfhosted software and apps
awesome-selfhosted software
awesome-sysadmin resources
Self-Hosted Podcast from Jupiter Broadcasting

Any issues on the community? Report it using the report flag.

Questions? DM the mods!

founded 1 year ago

MODERATORS

[email protected]

Service to fetch and print email and attachments (discuss.tchncs.de)

submitted 11 months ago* (last edited 11 months ago) by [email protected] to c/[email protected]

14 comments fedilink hide all child comments

Hi fellow self-hosting lemmings,

In an SME setting, I'm looking for a service to regularly fetch mails from an IMAP server and print incoming mails and attachments on a local network printer based on rules (e.g., only print mails where the subject contains a specific word.)

Does a solution like that exist, ideally with a browser frontend to set it up?

Thank you!

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 1 points 10 months ago (1 children)

BTW, if you do end up using this method, I'd love to see your implementation some day. Node Red is so useful and intuitive IMO, and people sharing their solutions is valuable.

[–] [email protected] 1 points 10 months ago* (last edited 10 months ago)

One deep dive into the IPP protocol, printer drivers, and specific supported formats ("what the hell is an octet-stream?!") later, I have something functional.

I'm not a JS guy, so I don't know if it's a very node-y way to do it. But except for the pages coming out a little scaled this works:

Edit to briefly explain what this does: The mail node ingests unread emails and passes them forward to a function node that checks for pdf attachments. Those are passed forward one by one to a function node that takes care of converting the pdf to pcl (my printer supposedly knows how to handle pdf 1.7 but doesn't, so I had to resort to this) and passes it to the IPP node as a data buffer .

spoiler

[ { "id": "86082bed0ed29155", "type": "IPPrint", "z": "08cc7c15668f2f65", "name": "Print to Network", "IP": "10.10.0.19:631/ipp/print", "JOB_name": "default_job_name", "authuser": "", "authpassword": "", "authcheck": "", "x": 780, "y": 120, "wires": [ [ "b1a8b92ede8a78a5" ] ] }, { "id": "b1a8b92ede8a78a5", "type": "debug", "z": "08cc7c15668f2f65", "name": "debug 1", "active": true, "tosidebar": true, "console": false, "tostatus": false, "complete": "true", "targetType": "full", "statusVal": "", "statusType": "auto", "x": 960, "y": 120, "wires": [] }, { "id": "1fb7fc3843af8e05", "type": "function", "z": "08cc7c15668f2f65", "name": "Convert PDF to PCL", "func": "const baseOptions = {\n  width: 2480,\n  height: 3508,\n  density: 300,\n  preserveAspectRatio: true,\n  format: 'PCL'\n};\n\n// prepare conversion function\nconst convert = await pdf2pic.fromBuffer(msg.payload, baseOptions);\n// set additional conversion options\nconvert.setGM\n// bulk convert the whole input buffer to a pcl output buffer\nconvert.bulk(-1, {responseType: \"buffer\"}).then((outputs)=>{\n  // pass each page on to the printer\n  outputs.forEach((output, index) => {\n      msg.payload = output.buffer;\n      if(msg.topic){\n        let jobname = msg.topic\n      }\n      msg.JOBName = (msg.topic ? msg.topic : \"Mailjob\").concat(\" \", index+1, \"/\", outputs.length);\n      msg.docFormat = \"application/octet-stream\";\n      node.send(msg);\n    });\n});\n", "outputs": 1, "timeout": 0, "noerr": 0, "initialize": "", "finalize": "", "libs": [ { "var": "pdf2pic", "module": "pdf2pic" } ], "x": 560, "y": 120, "wires": [ [ "86082bed0ed29155" ] ] }, { "id": "224317e794da3cb5", "type": "e-mail in", "z": "08cc7c15668f2f65", "name": "Mail ingest", "protocol": "IMAP", "server": "test.mail.com", "useSSL": false, "autotls": "always", "port": "143", "authtype": "BASIC", "saslformat": true, "token": "oauth2Response.access_token", "box": "INBOX", "disposition": "Read", "criteria": "UNSEEN", "repeat": "300", "fetch": "auto", "inputs": 0, "x": 160, "y": 80, "wires": [ [ "2fedaa18c9394b89" ] ] }, { "id": "2fedaa18c9394b89", "type": "function", "z": "08cc7c15668f2f65", "name": "PDF Filter", "func": "if(msg.attachments.length > 0){\n    msg.attachments.forEach(function(attachment) {\n        if(attachment.contentType == \"application/pdf\"){\n            var newmsg = {};\n            newmsg.topic = msg.topic;\n            newmsg.filename = attachment.filename;\n            newmsg.payload = attachment.content;\n            node.send(newmsg);\n        }\n    });\n}", "outputs": 1, "timeout": 0, "noerr": 0, "initialize": "", "finalize": "", "libs": [], "x": 360, "y": 80, "wires": [ [ "1fb7fc3843af8e05" ] ] }, { "id": "3d8f7ad8e6b56d46", "type": "inject", "z": "08cc7c15668f2f65", "name": "Test print", "props": [ { "p": "payload" }, { "p": "topic", "vt": "str" } ], "repeat": "", "crontab": "", "once": false, "onceDelay": 0.1, "topic": "", "payload": "", "payloadType": "date", "x": 160, "y": 160, "wires": [ [ "683ed6fe7c10540d" ] ] }, { "id": "683ed6fe7c10540d", "type": "file in", "z": "08cc7c15668f2f65", "name": "", "filename": "/data/2517.pdf", "filenameType": "str", "format": "", "chunk": false, "sendError": false, "encoding": "none", "allProps": false, "x": 340, "y": 160, "wires": [ [ "1fb7fc3843af8e05" ] ] } ]