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‎.gitignore

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.idea
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.DS_Store
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node_modules
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scratch.js

‎README.md

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# Internet Printing Protocol (IPP) for nodejs
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---
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A pure Javascript implementation of the IPP/2.0 protocol that has no dependencies.
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The IPP protocol was started in the 90's and is still being worked on today. It is a very indepth protocol that spans many
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RFCs- some of which are dead while others were herded into IPP/v2.x.
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There are millions of printers that support IPP. If you have one, this module will allow you to send/recieve data to/from
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the printer.
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To find out if your printer supports IPP:
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* Google your printer's specs
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* Try: `telnet YOUR_PRINTER 631`. If it connects, that's a good sign.
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* Use the ['/examples/findPrinters.js'](https://github.com/williamkapke/ipp/tree/master/examples/findPrinters.js) script.
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I have a pretty good starting point here. I created reference files
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(`attributes`, `enums`, `keywords`, `operations`, `status-codes`, `versions` and `tags`) and tried to include as many
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links in the comments to the ref docs as I could.
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### Install
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```bash
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$ npm install ipp
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```
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## Printer(url [,options])
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```javascript
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var ipp = require('ipp');
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var PDFDocument = require('pdfkit');
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//make a PDF document
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var doc = new PDFDocument({margin:0});
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doc.text(".", 0, 780);
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doc.output(function(pdf){
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var printer = ipp.Printer("http://NPI977E4E.local.:631/ipp/printer");
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var msg = {
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"operation-attributes-tag": {
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"requesting-user-name": "William",
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"job-name": "My Test Job",
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"document-format": "application/pdf"
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},
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data: pdf
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};
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printer.execute("Print-Job", msg, function(err, res){
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console.log(res);
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});
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});
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```
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To interact with a printer, create a `Printer` object.
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> Technically speaking: a `Printer` object does not need to be an actual printer. According to the IPP spec, it
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> could be any endpoint that accepts IPP messages. For example; the IPP object __could__ be persistant media- like a
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> CD ROM, hard drive, thumb drive, ...etc.
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**options:**
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* `charset` - Specifies the value for the 'attributes-charset' attribute of requests. Defaults to `utf-8`.
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* `language` - Specifies the value for the 'attributes-natural-language' attribute of requests. Defaults to `en-us`.
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* `uri` - Specifies the value for the 'printer-uri' attribute of requests. Defaults to `ipp://+url.host+url.path`.
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* `version` - Specifies the value for the 'version' attribute of requests. Defaults to `2.0`.
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### printer.execute(operation, message, callback)
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Executes an IPP operation on the Printer object.
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* 'operation' - There are many operations defined by IPP. See: [/lib/enums.js](https://github.com/williamkapke/ipp/blob/master/lib/enums.js#L52).
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* 'message - A javascript object to be serealized into an IPP binary message.
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* 'callback(err, response)' - A function to callback with the Printer's response.
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## ipp.parse(buffer)
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Parses a binary IPP message into a javascript object tree.
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```javascript
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var ipp = require('ipp');
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var data = new Buffer(
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'0200' + //version 2.0
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'000B' + //Get-Printer-Attributes
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'00000001'+ //reqid
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'01' + //operation-attributes-tag
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//blah blah the required bloat of this protocol
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'470012617474726962757465732d6368617273657400057574662d3848001b617474726962757465732d6e61747572616c2d6c616e67756167650002656e' +
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'03' //end-of-attributes-tag
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,'hex');
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var result = ipp.parse(data);
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console.log(JSON.stringify(result,null,2));
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// ta-da!
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//{
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// "version": "2.0",
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// "operation": 11,
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// "id": 1,
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// "operation-attributes-tag": {
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// "attributes-charset": "utf-8",
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// "attributes-natural-language": "en"
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// }
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//}
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```
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## ipp.serialize(msg)
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Converts an IPP message object to IPP binary.
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See [request](#request) for example.
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<a id="request"></a>
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## ipp.request(url, data, callback)
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Makes an IPP request to a url.
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```javascript
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var ipp = require('ipp');
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var uri = "your_printer";
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var data = ipp.serialize({
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"operation":"Get-Printer-Attributes",
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"operation-attributes-tag": {
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"attributes-charset": "utf-8",
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"attributes-natural-language": "en",
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"printer-uri": uri
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}
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});
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ipp.request(uri, data, function(err, res){
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if(err){
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return console.log(err);
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}
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console.log(JSON.stringify(res,null,2));
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})
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// ta-da!.. hopefully you'll see a ton of stuff from your printer
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```
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## Browser Support?
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See [this thread](https://github.com/williamkapke/ipp/issues/3)
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## License
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MIT

‎backend/public/dorms.txt

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1222222
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333
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1
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1
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1

‎backend/server.js

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const express = require('express');
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var bodyParser = require('body-parser')
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const fileUpload = require('express-fileupload');
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const cors = require('cors')
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const ipp = require('../ipp.js')
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const mime = require('mime')
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const libre = require('libreoffice-convert');
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const fs = require('fs');
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var extension
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var buffer
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var Printer = ipp.Printer("http://192.168.66.50:631/printers/412_printer");
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const officeFormat = ['application/vnd.openxmlformats-officedocument.wordprocessingml.document',
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'application/msword',
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'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
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'application/vnd.ms-excel',
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"application/vnd.ms-powerpoint",
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"application/vnd.openxmlformats-officedocument.presentationml.presentation"
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]
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const validExtensions = ['application/pdf',
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'image/jpeg',
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'image/png'].concat(officeFormat)
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const app = express();
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app.use(bodyParser())
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// middleware
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app.use(express.static('public')); //to access the files in public folder
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app.use(cors()); // it enables all cors requests
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// once the file is uploaded,it can be accessed from req.files.*
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app.use(fileUpload({
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// 10MB
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limits: {fileSize: 10 * 1024 * 1024},
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}));
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// file upload api
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app.post('/upload', (req, res, next) => {
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if (!req.files) {
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return res.send({msg: "file is not found"})
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}
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extension = mime.getType(req.files.file.name)
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if (validExtensions.indexOf(extension) === -1) {
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return res.send({msg: "非法文件类型！"})
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}
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buffer = req.files.file.data
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if (officeFormat.indexOf(extension) !== -1) {
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// extension = 'application/pdf'
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ConvertDocToPdfPrint()
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.then(modifiedData => {
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var msg = {
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"operation-attributes-tag": {
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"last-document": true,
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"job-id": req.body['job-id'],
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"requesting-user-name": "normal user",
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// this is really problematic
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// "document-format": "application/octet-stream"
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"document-format": "application/pdf",
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//iso_a4_210x297mm
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},
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data: modifiedData
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};
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Printer.execute("Send-Document", msg, function (err, res_) {
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res.send(err || res_);
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});
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})
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.catch(err=>{res.send({msg: `${err}服务端错误`})})
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}else{
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var msg = {
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"operation-attributes-tag": {
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"last-document": true,
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"job-id": req.body['job-id'],
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"requesting-user-name": "normal user",
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// this is really problematic
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// "document-format": "application/octet-stream"
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"document-format": extension,
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//iso_a4_210x297mm
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},
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data: buffer
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};
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Printer.execute("Send-Document", msg, function (err, res_) {
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res.send(err || res_);
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});
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}
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// pass all the filter,then go to print stage
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})
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app.post('/query', (req, res) => {
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Printer.execute("Get-Printer-Attributes", null, function (err, res_) {
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availability = res_["printer-attributes-tag"]["printer-state"] == 'idle' && res_["printer-attributes-tag"]["printer-is-accepting-jobs"]
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queuedJob = res_["printer-attributes-tag"]["queued-job-count"]
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res.send({"status": availability, "wait": queuedJob})
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res.send({"status": 'fuck', "wait": 'you'})
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});
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})
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app.post('/create-job', (req, res) => {
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console.log('fuck')
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var create_msg = {
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"operation-attributes-tag": {
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"requesting-user-name": "normal user"
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},
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// fix none A4 document bug
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"job-attributes-tag": {
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"copies": req.body.copies,
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// this is for routing and schedualing only
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// "job-impressions":req.body.number,
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// "job-media-sheets":(req.body.copies)*(req.body.number)
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}
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};
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fs.appendFileSync('./public/dorms.txt',req.body.dorm+'\n',function (err) {
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console.log(err)
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})
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try {
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Printer.execute("Create-Job", create_msg, function (err, res_) {
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// console.log(res_)
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if (!("job-id" in res_['job-attributes-tag'])) {
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return res.status(500).send({msg: "创建任务失败，请重试"})
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}
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let jobId = res_['job-attributes-tag']['job-id'];
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// console.log(jobId)
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res.send({"job-id": jobId})
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});
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} catch (e) {
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res.send(e)
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};
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})
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function ConvertDocToPdfPrint() {
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return new Promise((resolve,reject)=> {
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libre.convert(buffer, '.pdf', undefined, (err, done) => {
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return err ?
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reject(err) :
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resolve(done)
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});
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})
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}
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app.listen(4500, () => {
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console.log('server is running at port 8080');
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})

‎examples/Get-Job-Attributes.js

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var ipp = require('./../ipp');
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var printer = ipp.Printer("http://cp02.local.:631/ipp/printer");
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var msg = {
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"operation-attributes-tag": {
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'job-uri': 'ipp://CP01.local/ipp/printer/0186'
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}
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};
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function go(){
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printer.execute("Get-Job-Attributes", msg, function(err, res){
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console.log(res);
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setTimeout(go, 0);
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});
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}
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go();

‎examples/Get-Jobs.js

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var ipp = require('./../ipp');
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var printer = ipp.Printer("ipp://cp02.local.:631/ipp/printer");
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var msg = {
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"operation-attributes-tag": {
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//use these to view completed jobs...
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// "limit": 10,
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"which-jobs": "completed",
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"requested-attributes": [
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"job-id",
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"job-uri",
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"job-state",
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"job-state-reasons",
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"job-name",
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"job-originating-user-name",
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"job-media-sheets-completed"
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]
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}
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}
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printer.execute("Get-Jobs", msg, function(err, res){
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if (err) return console.log(err);
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console.log(res['job-attributes-tag']);
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});

‎examples/Get-Printer-Attributes.js

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var ipp = require('./../ipp');
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var id = 0x0123;//made up reqid
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var printer = ipp.Printer("http://cp02.local.:631/ipp/printer");
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printer.execute("Get-Printer-Attributes", null, function(err, res){
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console.log(res);
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});

‎examples/Get-Printer-Attributes2.js

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/*
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Poll the printer for a limited set of attributes
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*/
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var ipp = require('./../ipp');
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var id = 0x0123;//made up reqid
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var printer = ipp.Printer("http://cp02.local.:631/ipp/printer");
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var msg = {
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"operation-attributes-tag": {
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"document-format": "application/pdf",
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"requested-attributes": [
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"queued-job-count",
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"marker-levels",
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"printer-state",
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"printer-state-reasons",
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"printer-up-time"
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]
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}
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};
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function printer_info(){
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printer.execute("Get-Printer-Attributes", msg, function(err, res){
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console.log(JSON.stringify(res['printer-attributes-tag'], null, 2));
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setTimeout(printer_info, 1);
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});
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}
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printer_info();

‎examples/Identify-Printer.js

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var ipp = require('./../ipp');
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var id = 0x0123;//made up reqid
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var printer = ipp.Printer("http://cp02.local.:631/ipp/printer");
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var msg = {
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"operation-attributes-tag": {
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"requesting-user-name": "William",
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"message": "These are not the droids you are looking for"
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}
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};
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printer.execute("Identify-Printer", msg, function(err, res){
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console.log(res);
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});

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