启动带有 NPM 模块 "file-exists" 的 Node-RED 时出现意外令牌错误
Unexpected token error when starting Node-RED with NPM module "file-exists" implemented
我目前正在 Node-RED 中开发一个应用程序,我想使用 NPM 中的一些模块。 James Thom 的这个模块可以自动执行我可以使用的 NPM 模块 (node-red-contrib-npm)。
但是,我想首先进行手动实施,以更彻底地 node.js 并更好地理解它的工作原理(我是 node.js 的新手)。因此,我没有使用该模块,而是按照官方 Node-RED 指南所说 here:
- 相应地编辑 settings.js 文件中的 functionGlobalContext 属性,例如使用 ccount NPM 包:
functionGlobalContext: {
// os:require('os'),
// octalbonescript:require('octalbonescript'),
// jfive:require("johnny-five"),
// j5board:require("johnny-five").Board({repl:false})
// fileExists:require("file-exists") //DOESN'T WORK!!
ccount:require('ccount') //WORKS FINE!!
},
- 在 Node-RED 函数节点中,我输入:
var ccount = context.global.get('ccount');
msg.a = ccount('((())))))', '(') //=> 2
msg.b = ccount('pepe', ')') //=> 1
return msg;
- 帐户工作正常。现在,我根据 README.md 文件中的示例代码对 file-exists 执行相同的操作:
functionGlobalContext: {
// os:require('os'),
// octalbonescript:require('octalbonescript'),
// jfive:require("johnny-five"),
// j5board:require("johnny-five").Board({repl:false})
fileExists:require("file-exists") //DOESN'T WORK!!
// ccount:require('ccount') //WORKS FINE!!
},
- 在 Node-RED 中,我在函数块中输入:
fileExists('/media/pi/SMOOTHIE/firmware.cur', (err, exists) => console.log(exists)) // OUTPUTS: true or false
console.log(fileExists.sync('/media/pi/SMOOTHIE/firmware.cur')) // OUTPUTS: true or false
return msg;
当我执行node-red-start时,控制台的输出是:
pi@raspberrypi:~ $ node-red-start
Start Node-RED
Once Node-RED has started, point a browser at http://192.168.1.104:1880
On Pi Node-RED works better with the Firefox or Chrome browser
Use node-red-stop to stop Node-RED
Use node-red-start to start Node-RED again
Use node-red-log to view the recent log output
Use sudo systemctl enable nodered.service to autostart Node-RED at every boot
Use sudo systemctl disable nodered.service to disable autostart on boot
Starting as a systemd service.
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
node-red-log 输出这个:
13 Sep 19:29:20 - [info] Starting flows
13 Sep 19:29:20 - [info] Started flows
13 Sep 19:29:20 - [info] serial port /dev/ttyACM0 opened at 57600 baud 8N1
13 Sep 19:30:25 - [info] Stopping flows
13 Sep 19:30:25 - [info] serial port /dev/ttyACM0 closed
13 Sep 19:30:25 - [info] Stopped flows
13 Sep 19:30:25 - [info] Starting flows
13 Sep 19:30:25 - [info] Started flows
13 Sep 19:30:25 - [info] serial port /dev/ttyACM0 opened at 57600 baud 8N1
Stopping Node-RED graphical event wiring tool....
13 Sep 19:31:54 - [info] Stopping flows
Stopped Node-RED graphical event wiring tool..
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
Started Node-RED graphical event wiring tool..
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
我没有其他要检查的东西。该过程很好,因为它适用于其他 npm 节点。 file-exists 模块 (https://www.npmjs.com/package/file-exists) 是由麻省理工学院的一些人制作和维护的,每天大约有 8 万次下载,所以我相信它应该可以工作。 GitHub 回购目前没有提到其他问题的错误。我可能做错了什么?
谢谢。
编辑:节点-e的输出"require('./settings.js');"
pi@raspberrypi:~/.node-red $ node -e "require('./settings.js');"
/home/pi/.node-red/node_modules/file-exists/index.js:4
function fileExists (filepath, options, done = function () {}) {
^
SyntaxError: Unexpected token =
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:373:25)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object.<anonymous> (/home/pi/.node-red/settings.js:179:13)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
pi@raspberrypi:~/.node-red $
文件存在节点需要节点 v6.x 或更新版本,错误是因为它使用了节点 v4.8.x 不理解的新语法。
您可以使用 here 中的 Node-RED 升级脚本,它将 Node-RED 升级到最新版本并将 NodeJS 升级到最新的 v6 版本
我目前正在 Node-RED 中开发一个应用程序,我想使用 NPM 中的一些模块。 James Thom 的这个模块可以自动执行我可以使用的 NPM 模块 (node-red-contrib-npm)。
但是,我想首先进行手动实施,以更彻底地 node.js 并更好地理解它的工作原理(我是 node.js 的新手)。因此,我没有使用该模块,而是按照官方 Node-RED 指南所说 here:
- 相应地编辑 settings.js 文件中的 functionGlobalContext 属性,例如使用 ccount NPM 包:
functionGlobalContext: {
// os:require('os'),
// octalbonescript:require('octalbonescript'),
// jfive:require("johnny-five"),
// j5board:require("johnny-five").Board({repl:false})
// fileExists:require("file-exists") //DOESN'T WORK!!
ccount:require('ccount') //WORKS FINE!!
},
- 在 Node-RED 函数节点中,我输入:
var ccount = context.global.get('ccount');
msg.a = ccount('((())))))', '(') //=> 2
msg.b = ccount('pepe', ')') //=> 1
return msg;
- 帐户工作正常。现在,我根据 README.md 文件中的示例代码对 file-exists 执行相同的操作:
functionGlobalContext: {
// os:require('os'),
// octalbonescript:require('octalbonescript'),
// jfive:require("johnny-five"),
// j5board:require("johnny-five").Board({repl:false})
fileExists:require("file-exists") //DOESN'T WORK!!
// ccount:require('ccount') //WORKS FINE!!
},
- 在 Node-RED 中,我在函数块中输入:
fileExists('/media/pi/SMOOTHIE/firmware.cur', (err, exists) => console.log(exists)) // OUTPUTS: true or false
console.log(fileExists.sync('/media/pi/SMOOTHIE/firmware.cur')) // OUTPUTS: true or false
return msg;
当我执行node-red-start时,控制台的输出是:
pi@raspberrypi:~ $ node-red-start
Start Node-RED
Once Node-RED has started, point a browser at http://192.168.1.104:1880
On Pi Node-RED works better with the Firefox or Chrome browser
Use node-red-stop to stop Node-RED
Use node-red-start to start Node-RED again
Use node-red-log to view the recent log output
Use sudo systemctl enable nodered.service to autostart Node-RED at every boot
Use sudo systemctl disable nodered.service to disable autostart on boot
Starting as a systemd service.
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
node-red-log 输出这个:
13 Sep 19:29:20 - [info] Starting flows
13 Sep 19:29:20 - [info] Started flows
13 Sep 19:29:20 - [info] serial port /dev/ttyACM0 opened at 57600 baud 8N1
13 Sep 19:30:25 - [info] Stopping flows
13 Sep 19:30:25 - [info] serial port /dev/ttyACM0 closed
13 Sep 19:30:25 - [info] Stopped flows
13 Sep 19:30:25 - [info] Starting flows
13 Sep 19:30:25 - [info] Started flows
13 Sep 19:30:25 - [info] serial port /dev/ttyACM0 opened at 57600 baud 8N1
Stopping Node-RED graphical event wiring tool....
13 Sep 19:31:54 - [info] Stopping flows
Stopped Node-RED graphical event wiring tool..
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
Started Node-RED graphical event wiring tool..
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
Started Node-RED graphical event wiring tool..
Error loading settings file: /home/pi/.node-red/settings.js
[SyntaxError: Unexpected token =]
我没有其他要检查的东西。该过程很好,因为它适用于其他 npm 节点。 file-exists 模块 (https://www.npmjs.com/package/file-exists) 是由麻省理工学院的一些人制作和维护的,每天大约有 8 万次下载,所以我相信它应该可以工作。 GitHub 回购目前没有提到其他问题的错误。我可能做错了什么?
谢谢。
编辑:节点-e的输出"require('./settings.js');"
pi@raspberrypi:~/.node-red $ node -e "require('./settings.js');"
/home/pi/.node-red/node_modules/file-exists/index.js:4
function fileExists (filepath, options, done = function () {}) {
^
SyntaxError: Unexpected token =
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:373:25)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object.<anonymous> (/home/pi/.node-red/settings.js:179:13)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
pi@raspberrypi:~/.node-red $
文件存在节点需要节点 v6.x 或更新版本,错误是因为它使用了节点 v4.8.x 不理解的新语法。
您可以使用 here 中的 Node-RED 升级脚本,它将 Node-RED 升级到最新版本并将 NodeJS 升级到最新的 v6 版本