Node.js What is Node.js? - Gateway/400gateway400.org/documents/Gateway400/Handouts/nodejs2015.pdf · Bobby's node.js chroot hack proofing ... $ mkdir myapp $ cd myapp $ ls my1st.js

Node.js

What is Node.js?

LPP OPS – watch this space… Node.js… Python… more coming… ( http://www.ibm.com/developerworks/ibmi/techupdates/opensource )

First, how do IBM i keep up?

http://www.ibm.com/developerworks/ibmi/techupdates/opensource

http://www.ibm.com/developerworks/ibmi/techupdates/opensource

Node.js, installation, PTFs, etc.?

What is Node.js?

Node.js® is a platform built on Chrome's JavaScript runtime

● easily building fast, scalable network applications

● event-driven, non-blocking I/O model

● lightweight and efficient

● perfect for data-intensive real-time applications

Node.js moves to IBM i

Node.js, like all successful Open Source, has many contributors● IBM i Node.js contribution

● DB2 access (new)● Toolkit XMLService (new)

XMLService

Yes, Node.js on IBM i!

Node.js® like asynchronous RPG sub-procedures

● Different threads sub-procedure tasks (same time)

● Callback when task completed

AsynchronousSynchronous

function cb(str) {}var conn1 = new xt.iConn(db, user, pwd, option);conn1.add(xt.iSh("sleep 10; date"));var conn2 = new xt.iConn(db, user, pwd, option);conn2.add(xt.iSh("sleep 10; date"));

var task1 = conn1.run(cb); // task 1 (async)var task2 = conn2.run(cb); // task 2 (async) XMLSERVICE REST interface

● task 1 and 2 are asynchronous● (typical node.js)

QSQSRVR DB2 BCI .0 PGM-sleep THDWQSQSRVR DB2 BCI .0 PGM-sleep THDW

Asynchronous(perfect)

XMLService

function cb(str) {}var conn = new xt.iConn(db, user, pwd, option);conn.add(xt.iCmd("CHGLIBL LIBL(MYLIB) CURLIB(MYLIB)"));var pgm = new xt.iPgm("ZZFAKE");pgm.addParam("a", "1A");pgm.addParam("b", "1A");pgm.addParam([ ["x","1A"], ["y", "1A"]);conn.add(pgm.toXML()); var task1 = conn.run(cb); // task 1

Synchronous(XML forced)

XMLService multi-part script conn.add()● task 1 is asynchronous, but ...● CHGLIBL occurs 1st, then PGM call

QSQSRVR DB2 BCI … CHGLIBL, then PGM call

XMLService

var task1 = task1(); // task 1 (not async)var task2 = task2(); // task 2 (not async)function cb(}function task1() { db.init(); db.conn(conf.Database); db.exec("SELECT LSTNAM, STATE FROM QCUSTCDT", cb); db.close(); return 0;};function task2() { db.init(); db.conn(conf.Database); db.exec("SELECT * from ANIMALS",cb); db.close(); return 0;};

Current db2i interface ... ● task 1 and task 2 are synchronous● (not typical node.js DB behavior)

QSQSRVR DB2 BCI … task 1, then task 2

Synchronous (DB2 not perfect)

DB2

function cb(str) {}var conn1 = new xt.iConn(db, user, pwd, option);var sql = new xt.iSql();sql.addQuery("call XMLSERVICE.iHANG()");conn1.add(sql.toXML());var conn2 = new xt.iConn(db, user, pwd, option);var sql1 = new xt.iSql();sql1.addQuery("call XMLSERVICE.iHANG()");conn2.add(sql1.toXML());

var task1 = conn1.run(cb); // task 1var task2 = conn2.run(cb); // task 2

XMLSERVICE REST interface ... ● task 1 and 2 are asynchronous● (typical node.js, xmlservice DB2 )

Asynchronous(perfect)

QSQSRVR DB2 BCI THDWQSQSRVR DB2 BCI THDW

XMLService

Debugbash-4.2$ node debug xmlservice.js < debugger listening on port 5858connecting... okbreak in xmlservice.js:9debug> nbreak in xmlservice.js:50 50 var arr = uri.host.split(":"); 51 var options = { 52 host: arr[0],debug> replPress Ctrl + C to leave debug repl> ixml'<?xml version=\'1.0\'?>\n<xmlservice><... (length: 562)'debug>

Safe Node.js on IBM i?

bash-4.3$ ls /QOpenSys/QIBM/ProdData/C++Compiler JavaVM Node OS400 SOIDeveloperTools NativeTools OPS SC1

bash-4.3$ ls /QOpenSys/QIBM/ProdData/Node/bin include lib notices.txt os400

bash-4.3$ export PATH=/QOpenSys/QIBM/ProdData/Node/bin:/usr/binbash-4.3$ export LIBPATH=/QOpenSys/QIBM/ProdData/Node/bin:/usr/libbash-4.3$ node --versionv0.10.29

Where is Nodejs now (mmm public)?

Mmm, playing with node,js in root file system of my system does NOT please me. I want your activities contained Ms. Bobby!

IBM i OPS GCC environment (chroot setup) ...

Node.js experiments are not going to mess up my system. And no more new LPARs. This is a job for PASE chroot.

== LPP OPS beta scripts ==... chroot_setup.sh - chroot environment, so you do not mess up your machine… pkg_setup.sh – install RPMs from any site… ( http://yips.idevcloud.com/wiki/index.php/PASE/OpenSourceBeta )== LPP OPS beta scripts ==

http://yips.idevcloud.com/wiki/index.php/PASE/OpenSourceBeta


Ranger

Bobby

Lefty

Wild Bill

IBM i chroot (change '/' location)

chroot /QOpenSys/bobby /usr/bin/bsh

chroot /QOpenSys/ranger /usr/bin/bsh

chroot /QOpenSys/lefty /usr/bin/bsh

chroot /QOpenSys/wildbill /usr/bin/bsh'/' is .../QOpenSys/wildbill/(*)

'/' is …/QOpenSys/lefty/(*)

'/' is …/QOpenSys/bobby/(*)

'/' is …/QOpenSys/ranger/(*)

No problem, but you are not going to mess up my system, so chroot you.

No chroot, '/' is … /(*)admin

Initial chroot void (nothing here)

./chroot_setup.sh (fill the box)

( http://yips.idevcloud.com/wiki/index.php/PASE/OpenSourceBeta )

$ mkdir -p /QOpenSys/bobby$ chroot /QOpenSys/bobby /bin/bsh/bin/bsh: No such file or directory

$ cd /QOpenSys/QIBM/ProdData/OPS/GCC $ ./chroot_setup.sh chroot_minimal.lst /QOpenSys/bobby **********************Live IBM i session (changes made).**********************

$ ./chroot_setup.sh chroot_OPS_NODE.lst /QOpenSys/bobby**********************$ mkdir -p /QOpenSys/bobby/home/bobby$ chroot_chown.sh bobby

./chroot_setup.sh (add Node.js)



When a user profile with a "." (dot) in their home directory path connects using ssh, sftp, or scp path the "/" (root) directory for that connected session is set to be the portion of the directory path prior to the "."

ssh, sftp, scp, with chroot directory...

On 400======> strTCPSVR SERVER(*SSHD)> mkdir -p /QOpenSys/bobby/home/bobby> CHGUSRPRF USRPRF(RANGER) LOCALE(*NONE) HOMEDIR(/QOpenSys/bobby/./home/bobby)

On laptop=========$ ssh bobby@myibmi




$ ssh bobby@ut30p30bobby@ut30p30's password: $ ls /QOpenSys bin dev home lib sbin tmp usr$ export PATH=/QOpenSys/QIBM/ProdData/Node/bin:/usr/binPATH=/QOpenSys/QIBM/ProdData/Node/bin:/usr/bin: is not an identifier$ ksh$ export PATH=/QOpenSys/QIBM/ProdData/Node/bin:/usr/bin$ export LIBPATH=/QOpenSys/QIBM/ProdData/Node/bin:/usr/lib$ node --versionv0.10.29$


Bobby safely running node.js in chroot ...

Ms. Bobby! Free free to conduct your node.js experiments in your private chroot jail. No access /QSYS.LIB, well, except for DB2 connect. Best of all, you are not messing up OPS node.js or PASE.

No access /QSYS.LIB



Bobby's node.js chroot hack proofing ...

$ mkdir myapp $ cd myapp$ lsmy1st.js$ node my1st.jsServer running at http://ut30p30:8080/

$ ssh bobby@ut30p30bobby@ut30p30's password: $ ls /QOpenSys bin dev home ...

No access /QSYS.LIB

$ cat my1st.jsvar http = require('http');http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World\n');}).listen(8080, 'ut30p30');console.log('Server running at http://ut30p30:8080/');

Bobby's node.js chroot Hello World ...

Bluemix Node.js remote IBM i?

http://myibminodejs.mybluemix.net/

(application not always running)

Web Application: http://myibminodejs.mybluemix.net/ Git repository: https://hub.jazz.net/project/rangercairns/MyIBMiNodeJs/overview

(application not always running, but source available)

Bluemix app move to IBM i?

Git repository: https://hub.jazz.net/project/rangercairns/MyIBMiNodeJs/overview

Bobby download Git ...

Download and unzip on your pc. Transfer all files up to IBM i, into your chroot location, same directories as in zip (/home/bobby/MyIBMiNodeJs).

Download

$ cd /home/bobby/MyIBMiNodeJs$ ls License.txt instructions.md publicREADME.md lib viewsREADME.txt manifest.yml xmlserviceprovider.jsapp.js package.json

Bobby chroot application ...$ ssh bobby@ut30p30bobby@ut30p30's password: $

$ ksh$ export PATH=/QOpenSys/QIBM/ProdData/Node/bin:/usr/bin$ export LIBPATH=/QOpenSys/QIBM/ProdData/Node/bin:/usr/lib$ node --versionv0.10.29

Bobby chroot application ...

$ node app.jsmodule.js:340 throw err;Error: Cannot find module 'express'

$ npm install expressmodule.js:340 throw err;Error: Cannot find module 'npmlog'

Never goes perfectly, most presentations lie about 'ops', this one shows it all.

Bobby chroot application ...$ cd /QOpenSys/QIBM/ProdData/Node/bin$ ls ../lib/node_modules/npm/bin/npm-cli.js../lib/node_modules/npm/bin/npm-cli.js$ ln -sf ../lib/node_modules/npm/bin/npm-cli.js npm$ ls -l npmlrwxrwxrwx 1 bobby 0 76 Nov 9 07:48 npm -> ../lib/node_modules/npm/bin/npm-cli.js$ cd$ npm --version1.4.14

$ npm install expressnpm ERR! fetch failed https://registry.npmjs.org/buffer-crc32/-/buffer-crc32-0.2.1.tgznpm ERR! fetch failed https://registry.npmjs.org/mkdirp/-/mkdirp-0.3.5.tgznpm ERR! fetch failed https://registry.npmjs.org/fresh/-/fresh-0.2.0.tgznpm ERR! fetch failed https://registry.npmjs.org/batch/-/[email protected] node_modules/express


Bobby chroot application ...

$ node app.jsApp started on port 3000events.js:72 throw er; // Unhandled 'error' eventError: listen EADDRINUSE

$ export VCAP_APP_PORT=8081$ export VCAP_APP_HOST=ut30p30$ node app.jsApp started on port 8081module.js:340 throw err; ^Error: Cannot find module 'jade'


Bobby chroot application ...$ npm install jadenpm ERR! fetch failed https://registry.npmjs.org/character-parser/-/[email protected] node_modules/jade$ node app.jsApp started on port 8081

This IBM i application moved from Bluemix is remotely chatting with Yips IBM i machine. It works my_IBMi<2>yips_IBMi, but, demo assuming your IBM i can talk REST web services outside firewall to HTTP (of course).

Bobby chroot (MyIBMiNodeJs/lib) ....

Same IBM i toolkit found in /QopenSys/QIBM/ProdData/Node/os400/xstoolkit/lib.Copied to Bluemix for application http://myibminodejs.mybluemix.net/

$ pwd/QOpenSys/QIBM/ProdData/Node/os400/xstoolkit/lib$ ls -1idataq.jsinetwork.jsiobj.jsiprod.jsirest.jsistoredp.jsitoolkit.jsiuserSpace.jsiwork.jsixml.js

Bobby application xmlserviceprovider.js...




Bobby application app.js (control)...

Bobby app.js (control)...

get (read)

post (write)

IBM i toolkit

Bobby app.js index.jade (/) ....

Bobby app.js cat.jade (/cat)....

Bobby app.js big.jade (/big) ....

Also, Ruby Rails use Node.js?

PowerRuby Rails Asset Pipeline requires JavaScript (Node.js)● framework concatenate JavaScript and CSS assets ● hybrid lang assets CoffeeScript, Sass and ERB.● CoffeScript compiles into JavaScript (via Node.js)

> rails new appname

Rails Asset Pipeline

# Assignment:number = 42opposite = true# Conditions:number = -42 if opposite# Functions:square = (x) -> x * x# Arrays:list = [1, 2, 3, 4, 5]# Objects:math = root: Math.sqrt square: square cube: (x) -> x * square x

var cubes, list, math, number, opposite, square;number = 42;opposite = true;if (opposite) { number = -42;}square = function(x) { return x * x;};list = [1, 2, 3, 4, 5];math = { root: Math.sqrt, square: square, cube: function(x) { return x * square(x); }};

PowerRuby Rails Asset Pipeline

Questions?

Documents

Node.js What is Node.js? - Gateway/400gateway400.org/documents/Gateway400/Handouts/nodejs2015.pdf · Bobby's node.js chroot hack proofing ... $ mkdir myapp $ cd myapp $ ls my1st.js