从电子申请打印 [英] Print from electron application

问题描述

我正在尝试使用电子应用程序中的节点打印机，但是一旦我添加了使用打印机，应用程序崩溃。

I'm trying to use node printer from an electron application, but as soon I add the lines to use the printer, the app crashes down.

控制台输出：

[1] 9860分段错误（核心转储）node_modules / electron-prebuilt / dist / electron。


这是我正在运行的应用程序。我只在电子文档中提供的简单应用示例中添加了打印行：

This is the app I'm running. I only added the printing lines to the simple app example provided on electron documentation:

var app = require('app');  // Module to control application life.
var BrowserWindow = require('browser-window');  // Module to create native browser window.
var printer = require('printer');

// Report crashes to our server.
require('crash-reporter').start();

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is GCed.
var mainWindow = null;

// Quit when all windows are closed.
app.on('window-all-closed', function() {
  // On OS X it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform != 'darwin') {
    app.quit();
  }
});

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
app.on('ready', function() {
  // Create the browser window.
  mainWindow = new BrowserWindow({width: 800, height: 600});

  // and load the index.html of the app.
  mainWindow.loadUrl('file://' + __dirname + '/app/index.html');

  // Open the devtools.
  mainWindow.openDevTools();

  printer.printDirect({data:"print from Node.JS buffer" // or simple String: "some text"
      , printer:'HP-Deskjet-F4400-series' // printer name, if missing then will print to default printer
      , type: 'TEXT' // type: RAW, TEXT, PDF, JPEG, .. depends on platform
      , success:function(jobID){
          console.log("sent to printer with ID: "+jobID);
      }
      , error:function(err){console.log(err);}
  });


  // Emitted when the window is closed.
  mainWindow.on('closed', function() {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    mainWindow = null;
  });
});

我错过了什么吗？
我自己尝试了节点打印机，并成功打印了一些乱码文本。

Am I missing something? I tried the node printer on its own and I successfully printed some gibberish text.

推荐答案

node-printer 使用本机绑定并根据 docs ：

node-printer uses native bindings and according to the docs:

Electron支持本机Node模块，但由于Electron
正在使用与官方节点不同的V8版本，你需要
在构建
本机模块时手动指定Electron标头的位置。

The native Node modules are supported by Electron, but since Electron is using a different V8 version from official Node, you have to manually specify the location of Electron's headers when building native modules.

我想这就是你得到 seg fault 的原因。尝试根据文档中提到的电子标题构建模块：

I suppose that is why you are getting the seg fault. Try to build the module against the electron headers as mentioned in the docs:

npm install --save-dev electron-rebuild

# Every time you run npm install, run this too
./node_modules/.bin/electron-rebuild

这篇关于从电子申请打印的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！