client

This is a page from my book, “A Survival Guide for New Consultants”

You can’t always save the client

“When you can do nothing, what can you do?”

A Zen koan

As I’ve mentioned, you’re hired to be a consultant because you’re a problem-solver, so it really hurts when you can’t help a client. It’s a tough lesson, but it’s an important one:

Despite your best efforts,
you can’t always save the client.

Processing HTTP response headers with a ScalaJ-HTTP web client

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

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

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

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.