HTTP

This manual will give you a walk-through on how to use the HTTP web services.

• Introduction

• Examples

  • Example #1

  • Example #2

Introduction

HTTP Service is the most lightweight and unrestricted remote service: it supports POST and GET requests to a predefined URL. Result is retrieved as is and rendered as a webpage.

Examples

Example #1

This example will show how to call chemicalize.com via an HTTP web service. In this case we want to calculate the pK_a values of a molecule.

Fig. 1 HTTP service calling the pK_a calculator of chemicalize.org

An example calculation with this webservice can be found below.

Fig. 2 Result of the pK_a calculation via the webservice calling chemicalize.org

Example #2

This example shows how to reach the functionalities of chemicalize.com via HTTP API.

    HTTPServiceDescriptor descriptor = new HTTPServiceDescriptor();
    descriptor.setURL("https://chemicalize.com/tomcat-files/datapage.jsp");

    descriptor.addArgument(ServiceArgument.createArgument("mol", ""));
    descriptor.addArgument(ServiceArgument.createArgument("special", ""));
    descriptor.addArgument(ServiceArgument.createArgument("pka_width", 0));
 
    Object result = null;
    try {
        result = descriptor.getServiceHandler().callService(descriptor, "c1ccnccc1", "pka", 300);
    } catch (ServiceException e) {
       System.err.println("Service call failed.");
    }
    System.out.println("Synchronized call returned: " + String.valueOf(result));
 

    descriptor.getServiceHandler().callService(descriptor, new AsyncCallback<String>() {
 
        @Override
        public void onSuccess(String result) {
            System.out.println("Aynchronous call returned: " + result);
        }
 
        @Override
        public void onFailure(ServiceException caught) {
            System.err.println("Asynchronous call failed.");
        }

    }, "c1ccnccc1", "pka", 300);