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Processing HTTP response headers with a ScalaJ-HTTP web client

By Alvin Alexander. Last updated: September 11 2016

If for some reason you ever want to print out some HTTP response headers from a HEAD request when using ScalaJ-HTTP as an HTTP client, this example may help point you in the right direction:

import scalaj.http._

object TestHead extends App
{
    val response: HttpResponse[String] = Http("http://www.google.com")
        .method("HEAD")
        .timeout(connTimeoutMs = 2000, readTimeoutMs = 5000)
        .asString
    for ((k,v) <- response.headers) println(s"key:   $k\nvalue: $v\n")
}

I may write more about ScalaJ-HTTP in the future, but for today that’s a quick example of processing the response headers/parameters when making a HEAD request.

How to set HTTP headers when sending a web service request

By Alvin Alexander. Last updated: June 3 2016

Summary: This post is an excerpt from the Scala Cookbook, partially modified for the internet. This is a short recipe, Recipe 15.13, “How to set HTTP headers when sending a web service request.”

Problem

You need to set URL headers when making an HTTP request in Scala.

How to access HTTP response headers after making an HTTP request with Apache HttpClient

By Alvin Alexander. Last updated: June 3 2016

This is an excerpt from the Scala Cookbook (partially modified for the internet). This is a very short recipe, Recipe 15.12, “How to access HTTP response headers after making an HTTP request with Apache HttpClient.”

Problem

You need to access the HTTP response headers after making an HTTP request in your Scala code.

Solution

Use the Apache HttpClient library, and get the headers from the HttpResponse object after making a request:

How to create a Twitter client in Scala

By Alvin Alexander. Last updated: September 13 2016

This is an excerpt from the Scala Cookbook (partially modified for the internet). This is Recipe 15.10, “How to create a Twitter client in Scala.”

Problem

You want to create a client to connect to Twitter to access the information you want, such as showing timelines and trends.

How to write a simple HTTP GET request client in Scala (with a timeout)

By Alvin Alexander. Last updated: September 11 2016

This is an excerpt from the Scala Cookbook (partially modified for the internet). This is Recipe 15.9, “How to write a simple HTTP GET request client in Scala.”

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Problem

You want an HTTP client you can use to make GET request calls.

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Solution

There are many potential solutions to this problem. This recipe demonstrates three approaches:

Table of Contents

  1. Problem
  2. Solution
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A Sencha Touch mobile client and Play Framework server app

By Alvin Alexander. Last updated: June 3 2016

I’ve started to write a mobile app using Sencha Touch for the client, and the Play Framework and Scala on the server side (to create a RESTful API). At some point I may make all of this code open source, but for today I’m just going to share some pictures of the Sencha Touch client.

Notes list

First, here’s the Notes screen. A note can be anything with a title, and optional body:

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