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- Abstracted printer interface - Support for printer (https://www.npmjs.com/package/printer) - Support for electron-printer (https://www.npmjs.com/package/electron-printer) - Tested with more printers - Easy to use interface configuration strings (tcp://, printer:, \\.\COM1)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| var fs = require("fs"); | ||
|
|
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| var writeFile = require("write-file-queue")({ | ||
| retries : 1000, // number of write attempts before failing | ||
| waitTime : 200 // number of milliseconds to wait between write attempts | ||
| //, debug : console.error // optionally pass a function to do dump debug information to | ||
| }); | ||
|
|
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| function File(path) { | ||
| this.path = path; | ||
| } | ||
| File.prototype.execute = function(buffer, cb) { | ||
| writeFile(this.path, buffer, function (err) { | ||
| if (err) { | ||
| if ("function" === typeof cb) { | ||
| cb("Print failed: " + err); | ||
| } else { | ||
| console.error("Print failed", err); | ||
| } | ||
| } else { | ||
| if ("function" === typeof cb) { | ||
| cb( null ); | ||
| } else { | ||
| console.log("Print done"); | ||
| } | ||
| } | ||
| }); | ||
| }; | ||
| File.prototype.isPrinterConnected = function(exists){ | ||
| if (this.path){ | ||
| fs.exists(this.path, function(ex){ | ||
| exists(ex); | ||
| }); | ||
| } | ||
| }; | ||
|
|
||
| module.exports = File; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| const parseNet = /^tcp:\/\/([^\/:]+)(?::(\d+))?\/?$/i; | ||
| const parsePrinter = /^printer:([^\/]+)(?:\/([\w-]*))?$/i; | ||
|
|
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| function getInterface(uri) { | ||
| if (typeof uri === "object") { | ||
| return uri; | ||
| } | ||
| const net = parseNet.exec(uri); | ||
| if (net) { | ||
| const Mod = require('./net'); | ||
| return new Mod(net[1], net[2]); | ||
| } | ||
| const printer = parsePrinter.exec(uri); | ||
| if (printer) { | ||
| const Mod = require('./printer'); | ||
| return new Mod(printer[1], printer[2]); | ||
| } | ||
|
|
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| const Mod = require('./file'); | ||
| return new Mod(uri); | ||
| } | ||
| module.exports = getInterface; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| var net = require("net"); | ||
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|
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| function NetPrint(host, port) { | ||
| this.timeout = 3000; | ||
| this.host = host; | ||
| this.port = port || 9100; | ||
| } | ||
| NetPrint.prototype.execute = function(buffer, cb) { | ||
| var printer = net.connect({ | ||
| host : this.host, | ||
| port : this.port, | ||
| timeout: this.timeout | ||
| }, function() { | ||
| printer.write(buffer, null, function () { | ||
| if (typeof cb !== "undefined") { | ||
| cb(null); | ||
| } | ||
| printer.end(); | ||
| }); | ||
| }); | ||
| printer.on('error', function (err) { | ||
| if (typeof cb !== "undefined") { | ||
| cb(err); | ||
| } | ||
| printer.end(); | ||
| }); | ||
| printer.on('timeout', function () { | ||
| if (typeof cb !== "undefined") { | ||
| cb("Error: Socket Timeout"); | ||
| } | ||
| printer.end(); | ||
| }); | ||
| }; | ||
| NetPrint.prototype.isPrinterConnected = function(exists){ | ||
| var printer = net.connect({ | ||
| host : this.host, | ||
| port : this.port, | ||
| timeout: this.timeout | ||
| }, function() { | ||
| exists(true); | ||
| printer.end(); | ||
| }); | ||
| printer.on('error', function (err) { | ||
| exists(false); | ||
| printer.end(); | ||
| }); | ||
| printer.on('timeout', function () { | ||
| exists(false); | ||
| printer.end(); | ||
| }); | ||
| }; | ||
|
|
||
| module.exports = NetPrint; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| const electron = typeof process !== 'undefined' && process.versions && !!process.versions.electron; | ||
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| function PrinterIface(printerName, moduleName) { | ||
| this.name = printerName; | ||
| if (moduleName && typeof moduleName === "object") { | ||
| this.driver = moduleName; | ||
| } else { | ||
| this.driver = require(moduleName || (electron ? "electron-printer" : "printer")); | ||
| } | ||
| } | ||
| PrinterIface.prototype.getPrinterName = function() { | ||
| var name = this.name; | ||
| if (!name || name === "auto") { | ||
| const pl = this.driver.getPrinters().filter(function(p) { return p.attributes.indexOf("RAW-ONLY") > -1 }); | ||
| if (pl.length > 0) { | ||
| name = pl[0].name; | ||
| } | ||
| } | ||
| if (!name || name === "auto") { | ||
| throw "A RAW-ONLY Printer could not be detected. Please configure a Printer-Name"; | ||
| } | ||
| return name; | ||
| }; | ||
| PrinterIface.prototype.isPrinterConnected = function(exists){ | ||
| if (this.driver.getPrinter(this.getPrinterName())) { | ||
| exists(true); | ||
| } else { | ||
| exists(false); | ||
| } | ||
| }; | ||
| PrinterIface.prototype.execute = function(buffer, cb) { | ||
| this.driver.printDirect({ | ||
| data: buffer, | ||
| printer: this.getPrinterName(), | ||
| type: "RAW", | ||
| success: function(jobID) { | ||
| if (typeof cb === "function") { | ||
| cb(null); | ||
| } | ||
| }, | ||
| error: function(err) { | ||
| if (typeof cb === "function") { | ||
| cb(err); | ||
| } | ||
| } | ||
| }); | ||
| }; | ||
|
|
||
| module.exports = PrinterIface; |
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