Programing Languages – Lalit Mohan Jaimini

Use of Hindi (unicode) character from request parameter in java

String str = request.getParameter("sentence");
System.out.println("before convert - " + str);
str = new String(request.getParameter("sentence").getBytes("ISO-8859-1"),"UTF-8");
System.out.println("after convert - " + str);

Round a double to any decimal places in java

int n = 2;

round(xxxx.xxxxx, n); // Return xxxx.xx

Install Java in ubuntu 18.04

java -version
sudo apt install apt-get update
sudo apt install default-jdk

Send email In java using smtp

//import jar file from https://mvnrepository.com/artifact/javax.mail/mail/1.4.7 package com.mail.api.controller;


import com.sun.mail.smtp.SMTPTransport;

import java.util.Date;

import java.util.Properties;
import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.Session;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;
public class Mail {

    public static boolean sendMail(Email email){

        EmailTemplate template = email.getEmailTemplate();

        int SMTP_PORT = 465;

        final String EMAIL_TO = "";

        final String EMAIL_TO_CC = "";

        final String EMAIL_TO_BCC = "";

        final String EMAIL_SUBJECT = "";

        final String EMAIL_TEXT = "";

        Properties prop = System.getProperties();

        //prop.put("mail.debug", "true");

        prop.put("mail.smtp.host", SMTP_SERVER); //optional, defined in SMTPTransport

        prop.put("mail.smtp.auth", "true");

        prop.put("mail.smtp.socketFactory.port",SMTP_PORT);

        prop.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");

        prop.put("mail.smtp.socketFactory.fallback", "false");

        prop.put("mail.smtp.starttls.enable", "true");

        prop.put("mail.smtp.ssl","true");

        prop.put("mail.smtp.port", SMTP_PORT); // default port 25
        Session session = Session.getInstance(prop, null);

        Message msg = new MimeMessage(session);
        try {

            msg.setFrom(new InternetAddress(EMAIL_FROM));

            msg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(EMAIL_TO, false));

            msg.setRecipients(Message.RecipientType.CC,InternetAddress.parse(EMAIL_TO_CC, false));

            msg.setRecipients(Message.RecipientType.BCC,InternetAddress.parse(EMAIL_TO_BCC, false));

msg.setSubject(EMAIL_SUBJECT); msg.setContent(EMAIL_TEXT,"text/html"); msg.setSentDate(new Date()); // Get SMTPTransport SMTPTransport t = (SMTPTransport) session.getTransport("smtp"); t.connect(SMTP_SERVER, SMTP_USERNAME, SMTP_PASSWORD); t.sendMessage(msg, msg.getAllRecipients()); System.out.println("Response: " + t.getLastServerResponse()); t.close(); return true; } catch (MessagingException e) { e.printStackTrace(); } return false; } }

Amazon SES setup with django

EMAIL_BECKEND = 'django_smtp_ssl.SSLEmailBackend' (or EMAIL_BECKEND = 'backends.smtp.SSLEmailBackend') EMAIL_HOST = 'email-smtp.us-east-1.amazonaws.com' EMAIL_PORT = 465 EMAIL_HOST_USER = 'SMTP USERNAME' EMAIL_HOST_PASSWORD = 'SMTP PASSWORD' EMAIL_USE_TLS = True

Run Python Project On Port 80 Apache2 Configuration

ServerName domain.com
ServerAlias www.domain.com
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html/(python project folder Name)

<Directory /var/www/html/(python project folder Name)>
AllowOverride All
</Directory>
Alias /static /var/www/html/(python project folder Name)/static
<Directory /var/www/html/(python project folder Name)/static>
Require all granted
</Directory>
Alias /static /var/www/html/(python project folder Name)/media
<Directory /var/www/html/(python project folder Name)/media>
Require all granted
</Directory>
<Directory /var/www/html/(python project folder Name)/(python project folder Name)>
<Files wsgi.py>
Require all granted
</Files>
Require all granted
</Directory>

LoadModule wsgi_module “/var/www/html/myenv/lib/python3.6/site-packages/mod_wsgi/server/mod_wsgi-py36.cpython-36m-x86_64-linux-gnu.so”

WSGIDaemonProcess myenv1 python-path=/var/www/html/(python project folder Name):/var/www/html/myenv/lib/python3.6/site-packages
WSGIProcessGroup myenv1
WSGIScriptAlias / /var/www/(python project folder Name)/(python project folder Name)/wsgi.py

WSGIPassAuthorization On
WSGIApplicationGroup %{GLOBAL}

</VirtualHost>

Setup server for python ubuntu 16.04 LTE

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install apache2
sudo apt-get install python-pip
python –version
sudo pip install –upgrade pip
sudo pip install –upgrade virtualenv
sudo apt-get install mysql-server libmysqlclient-dev
cd document root
virtualenv myvenv
source myvenv/bin/activate
pip freeze (show install modules)
pip install Django
pip install mysqlclient