Binary Support for API Integrations with Amazon API Gateway - multipart/form-data, application/octet-stream

Binary Support for API Integrations with Amazon API Gateway

Create an API and POST method to support binary, eg: multipart/form-data, application/octet-stream

For API name , enter ‘Thumbnail’, add a description, and choose Create API.

In the created API, choose Resources , Actions , and Create Method.

To create the method, choose POST and select the checkmark.

To set up the POST method, for Integration type , select HTTP , enter ‘https://${stageVariables.environmentUrl}’ for Endpoint URL. Choose Save.

Set up the integration

Now, you are ready to set up the integration. In the main page, open Integration Request.

On the Integration Request page, check Use HTTP Proxy integration.For Content Handling , choose Passthrough.

Specify which media types need to be handled as binary. Choose [API name], Binary Support.

Choose Edit , specify the media type (such as “multipart/form-data”) to be handled as binary, and then choose Save.

Choose Edit , specify the media type (such as “application/octet-stream”) to be handled as binary, and then choose Save.

Deployment

Now that the API is configured, you need to deploy it. On the thumbnail Resources page, choose Action , Deploy API.

Testing

Now, you are ready to test the newly created API. 

Reference:
https://aws.amazon.com/blogs/compute/binary-support-for-api-integrations-with-amazon-api-gateway/

Install Eclipse-Che on Ubuntu server

Install jdk1.8+ & set JAVA_HOME

Install Docker

$ which curl
$ sudo apt-get update
$ sudo apt-get install curl
$ curl -sSL https://get.docker.com/ | sh

If you would like to use Docker as a non-root user, you should now consider
adding your user to the "docker" group with something like:

$ sudo usermod -aG docker serveradmin

Remember that you will have to log out and back in for this to take effect!

Verify docker is installed correctly

$ docker run hello-world
or
$ sudo docker run hello-world

This command downloads a test image and runs it in a container.

Download eclipse-che installation jar

The reason why I download the installation jar (JAR Universal Extractor) instead of directly use docker image with following command is that way isn't work for me. It's always showing some error.

$ docker run -it -p 1104:8080 codenvy/che

Install eclipse-che

$ sudo mkdir /usr/local/eclipse-che-4.0.0-RC3
$ sudo chown -R serveradmin:serveradmin /usr/local/eclipse-che-4.0.0-RC3
$ java -jar eclipse-che-latest.jar 

You should select "/usr/local/eclipse-che-4.0.0-RC3" as target installation dir.

Add execute permisson to TOMCAT script

$ cd /usr/local/eclipse-che-4.0.0-RC3/tomcat/bin
$ chmod +x *.sh

Set CHE_HOME

$ vi ~/.bashrc

Add the line to it

export CHE_HOME=/usr/local/eclipse-che-4.0.0-RC3

Reload

$ source ~/.bashrc

Create link to /usr/bin

$ sudo ln -s /usr/local/eclipse-che-4.0.0-RC3/bin/che.sh /usr/bin/che

Now,you can start Eclipse-Che by

$ che start

• Get current running class dir path

String jarOrBuildClassDir = getClass().getProtectionDomain().getCodeSource().getLocation().getPath();

It will return 'build/classes/main' if you run it on IDE

/Users/demo/workspace/MyDemo/build/classes/main/

It will return the location of 'jar' file which the class archived if you run it in a jar file

/Users/demo/workspace/MyDemo/install/MyDemo/lib/MyDemo.jar

• Get special resources file path that copy from 'src/main/java/resources/com/demo/test.xsl'

URL xslFileURL = getClass().getResource("/com/demo/test.xsl")

It will return 'build/resources/main' if you run it on IDE

/Users/demo/workspace/MyDemo/build/resources/main/com/demo/test.xsl

It will return the location of 'jar' file which the class archived if you run it in a jar file

file:/Users/demo/workspace/MyDemo/install/MyDemo/lib/MyDemo.jar!/com/demo/test.xsl

BTrace trace ClassLoader Leaking

If you want to trace the common ClassLoader leaking, you just probe where to invoke "ClassLoader#defineClass". The BTrace script as follow:

import com.sun.btrace.AnyType;
import com.sun.btrace.annotations.*;
import static com.sun.btrace.BTraceUtils.*;

@BTrace
public class Trace {

   @OnMethod(clazz = "+java.lang.ClassLoader", 
             method = "defineClass")
    public static void traceClassLoaderLeak(@ProbeClassName String clazz, @ProbeMethodName String method, @TargetInstance Object instance) {
        println("\n==== java.lang.ClassLoader#defineClass ====");
        jstack();
    }
}

Java client read content from URL with SSL

• Java client

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class PDFTester {
    private static final int FILE_BUFFER_SIZE = 2048;
    public static final String CONTENT_TYPE_PDF = "application/pdf";
    public static byte[] readPDFFromURL(URL url) throws IOException {
        System.setProperty("javax.net.ssl.trustStore", "C:/temp/myCA.jks");
        System.setProperty("javax.net.ssl.keyStorePassword", "changeit");

        HttpsURLConnection httpsURLConnection = (HttpsURLConnection) url.openConnection();
        httpsURLConnection.setHostnameVerifier(new HostnameVerifier() {
            public boolean verify(String hostname, SSLSession session) {
                return true;
            }
        });
        httpsURLConnection.connect();

        byte[] buffer = new byte[FILE_BUFFER_SIZE];
        int lengthOfByteToBeWrite;
        try (ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
             InputStream inputStream = httpsURLConnection.getInputStream()) {
            while ((lengthOfByteToBeWrite = inputStream.read(buffer)) != -1) {
                byteArrayOutputStream.write(buffer, 0, lengthOfByteToBeWrite);
            }
            byteArrayOutputStream.flush();
            return byteArrayOutputStream.toByteArray();
        } catch (IOException e) {
            throw e;
        }
    }

    public static void main(String[] args) throws IOException, URISyntaxException {
        URL url = new URL("https://www.sample.com/pdf");
        byte[] bytes = readPDFFromURL(url);
        Path path = Paths.get("c:/temp/test.pdf");
        Files.write(path, bytes);
    }
}

• SSL base knowledge:
  Implementing SSL / TLS using Java

Hide unnecessary Horizontal Scrollbar on jqgrid

use this css to remove it.

Share value between main report, multi sub reports

How to shared value between multi crystal report sub report?

1.       Create two sub reports

2.       Define Formula Field (defineGlobalPersonName)  in subReport1

3.       Tricky: This formula field (defineGlobalPersonName) must use in somewhere in sub report (subReport1) where inject value into the shared variable. Otherwise, other sub report where reference the shared value (personName)  can’t get the value when printing records.

4.       Used shared variable in other sub report (subReport2)

(a)    Declare another “formula field (retreiveBackPersonName)” to retrieve value from above shared variable (personName)

(b)   Use this formula field (retreiveBackPersonName)  in your sub report (subReport2)

5.       Preview final report

6.       If you want shared value to main report as well.  You just only declare one “formula field (sharedValue)”  in main report. Then you can use it