Building Web Applications With Erlang · Working With REST and Web Sockets on Yaws by Kessin, Zachary -- Read -- Imperial Library of Trantor

Index

Building Web Applications with Erlang Preface

Who This Book Is For Learning Erlang Before You Start What You Will Learn The Limits of This Book Help! It Doesn’t Compile or Run!

Diagnosing the Error What Version of Erlang and Yaws Are You Running? Is Everything Loaded Correctly? Are You Calling Everything Correctly? Is Mnesia Running with Correct Tables? Is the Example Just Plain Wrong?

Conventions Used in This Book Using Code Examples Safari® Books Online How to Contact Us Acknowledgments

1. Building Scalable Systems with Erlang and REST

Why Erlang?

Erlang’s Advantages Lack of Types OTP—For More Than Just Telecom!

Why Web Services? Why REST? New Opportunities for Scaling and Resilience

Cloud Computing System Architecture and Erlang Scaling

Scaling up versus scaling out Amdahl’s law

Data Storage Options

Mnesia CouchDB MongoDB Redis Riak

2. Getting Started with Yaws

Working with Yaws

Starting Yaws Serving Static Files Compiling, Loading, and Running Code Clustering Yaws

Dynamic Content in Yaws

EHTML Headers and Redirects

Templates

ErlyDTL

Logging

Erlang OTP error_logger

3. Appmods: Dynamic Content in Yaws

Appmod Configuration When the URI Does Not Correspond to a File Cookies Session Handling Access Control Interacting with Erlang Services and Business Logic Layers

4. Implementing REST

Decoding a Request

Extracting the User’s Request

Response and Headers Building the Response

JSON XML

Responding to the REST Request A Full Example

5. File Upload

The File Upload Request Saving to Disk Putting It All Together Storage in a Distributed System Saving to Amazon S3

6. WebSockets

The WebSocket Request Basic WebSocket Handler Advanced WebSocket Handler

7. Streaming

Simple Streaming

8. Using the HTTP Client

Making a Request Using OAuth

Facebook Canvas

9. Building an Application with OTP

Directory Structure Building an Application Server The Generic Server The Multicast Server Interfacing the Server with the Web Some Client-Side Code Let’s Have Some Adult Supervision Around Here! A Little Optimization Bundling as an Application The App File Wrapping Up OTP

A. Installing Erlang and Yaws B. Beyond Yaws

Web Servers

Cowboy MochiWeb Misultin

Web Frameworks

Chicago Boss Nitrogen Zotonic

C. Interfacing with Ruby and Python

Ruby Python

D. Using Erlang with Emacs

Distel Flymake Mode Gen Server Template

About the Author Copyright

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