Scala developers-Working with XML

Handling an XML request

A valid XML payload is used as the request body in an XML request, which is an HTTP request. Its Content-Type header must state whether the MIME type is application/xml or text/xml.

Any content body parser, which enables you to extract the body as XML, is used by default in an Action:

def func1 = Action { request =>
  request.body.asXml
    .map { xml =>
      (xml \\ "name" headOption)
        .map(_.text)
        .map { it =>
          Ok("Hello " + it)
        }
        .getOrElse {
          BadRequest("Missing parameter [it]")
        }
    }
    .getOrElse {
      BadRequest("Expecting Xml data")
    }
}

Asking Play to directly parse the content body as XML is far preferable to specifying our BodyParser:

def func1 = Action(parse.xml) { request =>
  (request.body \\ "name" headOption)
    .map(_.text)
    .map { it =>
      Ok("Hello " + it)
    }
    .getOrElse {
      BadRequest("Missing parameter [it]")
    }
}

curl 
  --header "Content-type: application/xml" 
  --request POST 
  --data '<name>Guillaume</name>' 
  http://localhost:9000/func1

It replies with:

HTTP/1.1 200 OK
Content-Type: text/plain; charset=utf-8
Content-Length: 15

Hello Ninja

Serving an XML response

We handled an XML request in our previous example but replied with a text/plain response. Let'sLet's change that to send back a valid XML HTTP response:

def func1 = Action(parse.xml) { request =>
  (request.body \\ "name" headOption)
    .map(_.text)
    .map { it =>
      Ok(<message status="OK">Hello
      {it}
    </message>)
    }
    .getOrElse {
      BadRequest(<message status="KO">Missing parameter [it]</message>)
    }
}

Now it replies with:

HTTP/1.1 200 OK
Content-Type: application/xml; charset=utf-8
Content-Length: 46


<message status="OK">Hello Ninja</message>

Frequently Asked Questions

What exactly is Scala Framework?

Ruby software includes the Scala domain-specific language and the web application library. Instead of Ruby on Rails, Merb, Nitro, and Camping, it uses a Ruby web application framework called Camping. It depends on the Rack web server interface. As a mark of respect, it carries Frank Scala's name.

How would you defend your business from a denial of service assault?

Consider using DoS prevention services that your service provider might offer or firewalls and other network security solutions. Get in touch with your Internet or cloud service provider as soon as you can. Recover. Search for any more instances of malicious behavior that may have taken place during the DoS attack.

What flaw can result in a denial of service attack?

Rarely a website or software defect is used in a DoS attack to forcibly use its resources or network connections, causing a denial of service. Some malware can also launch DoS attacks.

Describe Ruby rack.

Rack, a modular interface between web servers and web applications, was developed by Ruby programmers. For HTTP requests and responses, Rack encapsulates application programming interfaces (APIs) for middleware and web frameworks in a single method call.

What do you mean by Rails with Scala?

In contrast to Rails, a framework for creating model-driven online applications, Scala is a server-side HTTP library. If you think of HTTP requests and responses, Scala is the finest tool. If you need complete integration with the least amount of boilerplate possible, Rails is the way to go.

Conclusion

This article taught us how to work with XML as a scala developer. I hope you would have gained a better understanding of these topics now!

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• Accessing an SQL Database
• Integration with Akka
• Application Settings
   

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