Programming

Regular Expression to Check Indonesian MobilePhone Provider

By / 28 August 2014 / Java, Programming / , ,

These are simple regex to check Indonesia’s Mobile phone provider based on its number,

telkomsel.regex = ^(\\+62|\\+0|0|62)8(1[123]|52|53|21|22|23)[0-9]{5,9}$

simpati.regex = ^(\\+62|\\+0|0|62)8(1[123]|2[12])[0-9]{5,9}$

as.regex = ^(\\+62|\\+0|0|62)8(52|53|23)[0-9]{5,9}$

indosat.regex= ^(\\+62815|0815|62815|\\+0815|\\+62816|0816|62816|\\+0816|\\+62858|0858|62858|\\+0814|\\+62814|0814|62814|\\+0814)[0-9]{5,9}$

im3.regex = ^(\\+62855|0855|62855|\\+0855|\\+62856|0856|62856|\\+0856|\\+62857|0857|62857|\\+0857)[0-9]{5,9}$

xl.regex = ^(\\+62817|0817|62817|\\+0817|\\+62818|0818|62818|\\+0818|\\+62819|0819|62819|\\+0819|\\+62859|0859|62859|\\+0859|\\+0878|\\+62878|0878|62878|\\+0877|\\+62877|0877|62877)[0-9]{5,9}$

Hope it can help others, 😉

How To Simulate An Image Attachment HTTP Multipart POST

By / 13 June 2014 / Java, Programming / , , ,

Below is the code i use for simulating an image attachment using apache http client.

package com.edw.postsimulator;

import java.io.File;
import java.nio.charset.Charset;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

public class PostTest {

    private static String url = "http://localhost:8083/RealsAppApi/images/add";

    public static void main(String[] args) throws Exception {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);
        HttpContext localContext = new BasicHttpContext();
        
        Charset chars = Charset.forName("UTF-8");
        
        // http content
        MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
        entity.addPart("username", new StringBody("edwin", chars));
        entity.addPart("password", new StringBody("edwinpassword", chars));        
        
        // attach image
        File fileToUpload = new File("F:\\no.jpg");
        FileBody fileBody = new FileBody(fileToUpload, "application/octet-stream");
        entity.addPart("image", fileBody);
        httpPost.setEntity(entity);

        // fire and log the responses
        HttpResponse response = httpclient.execute(httpPost, localContext); 
        HttpEntity resEntity = response.getEntity();
        System.out.println(EntityUtils.toString(resEntity));
    }
}

These are the libraries i used for this project,
post simulator

Hope it would help others, have fun (Y)

Fixing WordPress’ Syntaxhighligther and Bootstrap Incompatibility

By / 5 March 2014 / CSS, Programming / , ,

Today’s i just updated my wordpress’ theme, from the old one to a much better one. I like the newer one because it has more flexibility, and also for its responsive design.

But i had an issue, somehow my syntaxhighlighter gives an extra row space and it happen only in Firefox. Here is the screenshot,

syntax highlighter issue

Somehow my latest wordpress theme shows incompatibility with Sytaxhighlighter css file. After sometime googling, i found out that i need to override a css property so my Syntaxhighlighter would works.

div.syntaxhighlighter .container:before,div.syntaxhighlighter .container:after {
    content:none;
}

Well i hope it helped others, have fun 🙂

Binding Date Property to SpringMVC’s @ModelAttribute

By / 1 March 2014 / Java, Programming / , , ,

Let say i have this java bean,

public class MyBean implements Serializable {
    private Integer id;
    private String userid;       
    private Date contacttime;
	
	// other setter and getter

And i have a SpringMVC Controller like this, using @ModelAttribute as the method’s parameter,

@RequestMapping(value = "/doSomething", method = RequestMethod.POST)
public @ResponseBody Object doSomething(@ModelAttribute MyBean myBean) {
	// do something
}

Im sending HTTP Post which format is like this

id=2&
userid=3abc&
contacttime=130314101010

But it shows error on my server side, which looks like this,

Failed to convert from type java.lang.String to type java.util.Date for value '130314101010'; 
nested exception is java.lang.IllegalArgumentException

Usually, i have to manually use SimpleDateFormat to parse my “ddMMyyHHmmss” String into Date, but SpringMVC provide a very elegant way of handling with this kind of conversion. Just by using @DateTimeFormat

import org.springframework.format.annotation.DateTimeFormat;

public class MyBean implements Serializable {
    private Integer id;
    private String userid;       
	
	@DateTimeFormat(pattern = "ddMMyyHHmmss")
    private Date contacttime;
	
	// other setter and getter

Dont forget to include JodaTime on your pom.xml

<dependency>
	<groupId>joda-time</groupId>
	<artifactId>joda-time</artifactId>
	<version>2.3</version>
</dependency>

If not, you will find this kind of error,

org.springframework.core.convert.ConversionFailedException: Failed to convert from type java.lang.String to type @org.springframework.format.annotation.DateTimeFormat java.util.Date for value '130314101010'; nested exception is java.lang.IllegalStateException: JodaTime library not available - @DateTimeFormat not supported

Have fun with SpringMVC 😀

How to Setup HTTPS Connection for NginX

By / 4 January 2014 / nix, Programming / , , ,

I just bought a new SSL Certificate from an SSL providers, and now im trying to install it on my nginx webserver. Now im trying to share the steps needed to install my ssl certificate, in case someone need it.

But first, i need to generate a .key and .csr file using openssl’s command, i will need those files to become a “secret key” or my private key. 

sudo openssl req -new -newkey rsa:2048 -nodes -keyout domain.key -out domain.csr

Next is i send my .csr file to SSL providers to generate .crt files. In my case, the SSL Provider, gives me 2 .crt files. First is the “Intermediate Certificate” (my_intermediate_ca.crt) and another one is “SSL Certificate” files (domain.crt).

First, i need to join those 2 crt files, 

cat domain.crt my_intermediate_ca.crt >> bundle.crt

It will look like this,

-----BEGIN CERTIFICATE-----
..... my domain.crt .......
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
..... my intermediate.crt .......
-----END CERTIFICATE-----

Next is registering my SSL on nginx, i just edit the ssl.conf here

sudo vi /etc/nginx/conf.d/ssl.conf

and add this lines

server {
    listen       443 default ssl;
    server_name  mydomain;

    server_tokens off;

    ssl_certificate      /crtlocation/bundle.crt;
    ssl_certificate_key  /crtlocation/domain.key;

    ssl_session_cache shared:SSL:1m;
    ssl_session_timeout  5m;

    ssl_ciphers  HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers   on;

    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
	}
}

Restart nginx and check your ssl using openssl command,

openssl s_client -debug -connect localhost:443

A good SSL configuration will give this result,

Verify return code: 0 (ok)

While bad ones will create result like this,

Hope it would help others, have fun 😀

ps.
i had one weird condition on my previous ssl installation, somehow my website shows valid ssl on desktop browsers, but shows broken ssl when accessed from mobile devices and android browsers. I found out it’s due to i provide the wrong .crt file on nginx’s ssl.conf, i provide domain.crt instead of bundle.crt. 🙁