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The Java Workshop

You're reading from   The Java Workshop Learn object-oriented programming and kickstart your career in software development

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Product type Paperback
Published in Oct 2019
Publisher Packt
ISBN-13 9781838986698
Length 606 pages
Edition 1st Edition
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Authors (3):
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Eric Foster-Johnson Eric Foster-Johnson
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Eric Foster-Johnson
Andreas Göransson Andreas Göransson
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Andreas Göransson
David Cuartielles David Cuartielles
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David Cuartielles
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Toc

Table of Contents (20) Chapters Close

Preface 1. Getting Started 2. Learning the Basics FREE CHAPTER 3. Object-Oriented Programming 4. Collections, Lists and Java's Built-In APIs 5. Exceptions 6. Libraries, Packages, and Modules 7. Databases and JDBC 8. Sockets, Files, and Streams 9. Working with HTTP 10. Encryption 11. Processes 12. Regular Expressions 13. Functional Programming with Lambda Expressions 14. Recursion 15. Processing Data with Streams 16. Predicates and Other Functional Interfaces 17. Reactive Programming with Java Flow 18. Unit Testing Appendix

Exploring HTTP

With HTTP, a client application sends a specially formatted request to a server and then awaits a response. Technically, HTTP is a stateless protocol. This means that the server is not required to maintain any state information related to the client. Each client request can be treated individually as a new operation. The server does not need to store client-specific information.

Many servers do maintain some sort of state across multiple requests, though, such as when you make a purchase online, and the server needs to store the products you have selected; however, the basic protocol does not require this.

HTTP is a textual protocol (with allowances for compression). An HTTP request includes the following parts:

  • An operation (called a request method), a resource identifier for the operation, and optional parameters on a line.
  • Request headers; one per line.
  • An empty line.
  • A message body, which is optional.
  • Each line ends with two characters...
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