Java

java

[Mule] Error 400 Bad Request, Request Header Or Cookie Too Large

By / 29 January 2016 / ESB, Programming / , , , ,

I had an error yersterday, when connecting Mule ESB to NGinx. Very weird, because somehow it never shown any errors when fired directly without a reverse proxy. Here is the complete stacktrace

<head><title>400 Request Header Or Cookie Too Large</title></head>
<body bgcolor="white">
<center><h1>400 Bad Request</h1></center>
<center>Request Header Or Cookie Too Large</center>
<hr><center>nginx/1.4.4</center>
</body>
</html>
 (javax.xml.ws.soap.SOAPFaultException)
  org.apache.cxf.jaxws.JaxWsClientProxy:156 (http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/xml/ws/soap/SOAPFaultException.html)
3. Response was of unexpected text/html ContentType.  Incoming portion of HTML stream: <html>
<head><title>400 Request Header Or Cookie Too Large</title></head>
<body bgcolor="white">
<center><h1>400 Bad Request</h1></center>
<center>Request Header Or Cookie Too Large</center>
<hr><center>nginx/1.4.4</center>
</body>
</html>

It happens because Mule, by default, send a very large cookies called “X-MULE_SESSION”. After removing it, my ESB runs well again. This is how i remove it,

<http:connector name="NoSessionConnector">
	    <service-overrides sessionHandler="org.mule.session.NullSessionHandler"/>
</http:connector>

Weird Error on Java Mail, “javax.mail.AuthenticationFailedException: No authentication mechansims supported by both server and client”

By / 5 January 2016 / Java, Programming / , , , ,

I run into a weird error that never happened before, somehow it happened since my user upgrade their Microsoft Mail Exchange’s version. Here is the complete stacktrace,

Caused by: javax.mail.AuthenticationFailedException: 
No authentication mechansims supported by both server and client
    at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:760)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:673)
    at javax.mail.Service.connect(Service.java:317)

I guess there are several reasons why it happens. First of all, it happens because im using starttls = “true” despite im connecting to port 25, first i change it into “false”. And the other thing is that im using username and password for connecting to my email exchange server, so the workaround is quite easy, just setting my mail.smtp.auth parameter into “false” instead of “true”. Or try sending email without setting username and password.

But actually, it’s much easier to fix the error on the mail server’s side, because it’s only a simple checklist configuration 😛

Creating Alphabet Numbering on Jasper Report

By / 31 December 2015 / Java, Programming / , ,

Usually jasper report provide a numbering, accessible using REPORT_COUNT variable, but today my friend Edward Barchia asked me something interesting, how can i create a simple numbering using alphabet instead of number. Well basically, it’s actually quite easy.

Below is the image, how i do it.
jasperreportcharat

Here is my complete jasper xml file,

<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="report1" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="97dae3d4-5e81-4825-b4e7-cf3d1f77190f">
	<property name="ireport.zoom" value="1.2100000000000002"/>
	<property name="ireport.x" value="0"/>
	<property name="ireport.y" value="42"/>
	<queryString language="SQL">
		<![CDATA[select * from testing]]>
	</queryString>
	<field name="id" class="java.lang.Integer">
		<fieldDescription><![CDATA[]]></fieldDescription>
	</field>
	<field name="name" class="java.lang.String">
		<fieldDescription><![CDATA[]]></fieldDescription>
	</field>
	<field name="address" class="java.lang.String">
		<fieldDescription><![CDATA[]]></fieldDescription>
	</field>
	<background>
		<band splitType="Stretch"/>
	</background>
	<title>
		<band height="79" splitType="Stretch"/>
	</title>
	<pageHeader>
		<band height="35" splitType="Stretch"/>
	</pageHeader>
	<columnHeader>
		<band height="20" splitType="Stretch">
			<staticText>
				<reportElement x="50" y="0" width="100" height="20" uuid="f68bc18a-5471-4d4f-89ed-34d98bb06b6e"/>
				<text><![CDATA[name]]></text>
			</staticText>
			<staticText>
				<reportElement x="150" y="0" width="100" height="20" uuid="155f7ce1-e70c-4d93-8ebc-bad45d9f0ae1"/>
				<text><![CDATA[address]]></text>
			</staticText>
			<staticText>
				<reportElement x="0" y="0" width="50" height="20" uuid="48b8e6ef-1efd-4233-98f5-b2da6d273333"/>
				<text><![CDATA[No]]></text>
			</staticText>
		</band>
	</columnHeader>
	<detail>
		<band height="20" splitType="Stretch">
			<textField>
				<reportElement x="50" y="0" width="100" height="20" uuid="3ffd3edf-b950-4dd9-8f13-ac8942e5bb8e"/>
				<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="150" y="0" width="100" height="20" uuid="236aec6c-34dc-4a54-ae2d-086c2a23786c"/>
				<textFieldExpression><![CDATA[$F{address}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="0" y="0" width="50" height="20" uuid="704b47d3-7dca-4f33-950a-a3efd0fb764b"/>
				<textFieldExpression><![CDATA["abcdefghijklmnopqrstuvwxyz".charAt( $V{REPORT_COUNT}-1 )]]></textFieldExpression>
			</textField>
		</band>
	</detail>
	<columnFooter>
		<band height="45" splitType="Stretch"/>
	</columnFooter>
	<pageFooter>
		<band height="54" splitType="Stretch"/>
	</pageFooter>
	<summary>
		<band height="42" splitType="Stretch"/>
	</summary>
</jasperReport>

[Java] SMS Gateway dengan Modem Zoglab Q2687RD

By / 12 January 2016 / Java, Programming / , ,

Baru-baru ini gw dapet kerjaan untuk membuat suatu sistem notifikasi yang terhubung dengan modem SMS, kebetulan modem yang dipakai adalah modem dengan merk Zoglab seri Q2687RD. Awalnya gw pikir menggunakan metode konvensional, menggunaan 7bit sms gateway ala-ala skripsi jaman gw masih kuliah, dan ternyata rada berbeda format AT Command-nya.

Oh ya, sebelumnya ini adalah wujud modemnya. Sekilas agak aneh, karena ada colokan power dibelakangnya tapi waktu membeli engga dapet kabel powernya. Ternyata powernya bisa lewat kabel USB.

modem zoglab

Oke, berikut adalah class java yang gw gunakan untuk testing sending SMS, kebetulan gw menggunakan library RXTXcomm.jar.

package com.edw.commportchecker;

import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;
import java.io.OutputStream;
import java.util.Enumeration;

public class Main {

    private OutputStream outputStream;
    private SerialPort serialPort;

    private void doSomething()
            throws Exception {
        Enumeration portList = CommPortIdentifier.getPortIdentifiers();
        System.out.println(portList.hasMoreElements());
        while (portList.hasMoreElements()) {
            CommPortIdentifier portId = (CommPortIdentifier) portList.nextElement();
            if (portId.getPortType() == 1) {
                System.out.println("connecting to " + portId.getName());
            }
            // kebetulan modem kedetect sebagai COM3
            if (portId.getName().equalsIgnoreCase("COM3")) {
                this.serialPort = ((SerialPort) portId.open("SMSGateway", 2000));
            }
        }


        this.serialPort.setSerialPortParams(9600, 8, 1, 0);
        this.serialPort.setFlowControlMode(0);

        this.outputStream = this.serialPort.getOutputStream();

        System.out.println("sending");

        // gunakan prefix +62, contoh : +62856727xxxx 
        // agak aneh nih, sebelumnya tanpa prefix "+" jalan, tapi ditengah jalan tiba2 jadi ga jalan T_T
        String nomerHp = ""; 
        
        // content sms yang akan dikirim
        String contentSMS = "ini isi sms-nya";
        
        sendToStream("AT\r");
        sendToStream("AT+CMGF=1\r");
        sendToStream("AT+CMGS=\""+nomerHp+"\"\r\n");
        sendToStream(contentSMS);
        sendToStream("\032");

        System.out.println("finish");

        System.exit(1);
    }

    private void sendToStream(String content) throws Exception {
        System.out.println(">" + content);

        this.outputStream.write(content.getBytes());
        this.outputStream.flush();

        Object o = new Object();
        synchronized ( o ) {
            o.wait(1500L);
        }
    }

    public static void main(String[] args) {
        Main main = new Main();
        try {
            main.doSomething();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

[Java] Create a Simple Http Get Request with GZip Compression Handling using Apache Httpclient

By / 30 July 2019 / Java, Programming / , ,

Previous Apache HttpClient use various class to handling compressed http response, such as DecompressingHttpClient and ContentEncodingHttpClient. But on the latest version, compression is handled automatically by using HttpClientBuilder class.

Here is my pom file

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.edw</groupId>
    <artifactId>Edw</artifactId>
    <version>1</version>
    <packaging>jar</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
    </properties>
    
    <dependencies>                
        <dependency>
            <groupId>commons-httpclient</groupId>
            <artifactId>commons-httpclient</artifactId>
            <version>3.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.1</version>
        </dependency>        
    </dependencies>
    
</project>

And this is my java class,

package com.edw.main;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

public class Main {

    public static void main(String[] args) throws Exception {
        Main main = new Main();
        System.out.println(main.getContent("http://localhost:8085/"));
    }

    private String getContent(String urlToRead) throws Exception {
        HttpEntity resEntity = null;
        try {
            HttpClient httpclient = HttpClientBuilder.create().build();
            HttpGet httpGet = new HttpGet(urlToRead);

            HttpResponse response = httpclient.execute(httpGet);
            resEntity = response.getEntity();

            return EntityUtils.toString(resEntity);
        } finally {
            if (resEntity != null) {
                EntityUtils.consume(resEntity);
            }
        }
    }
}