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The JavaScript JSON Cookbook

By : Ray Rischpater

1 (2)

The JavaScript JSON Cookbook

1 (2)

By: Ray Rischpater

Overview of this book

If you're writing applications that move structured data from one place to another, this book is for you. This is especially true if you've been using XML to do the job because it's entirely possible that you could do much of the same work with less code and less data overhead in JSON. While the book's chapters make some distinction between the client and server sides of an application, it doesn't matter if you're a frontend, backend, or full-stack developer. The principles behind using JSON apply to both the client and the server, and in fact, developers who understand both sides of the equation generally craft the best applications.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Sections

Conventions

Reader feedback

Customer support

Free Chapter

1. Reading and Writing JSON on the Client

1. Reading and Writing JSON on the Client

Introduction

Reading and writing JSON in JavaScript

Reading and writing JSON in C++

Reading and writing JSON in C#

Reading and writing JSON in Java

Reading and writing JSON in Perl

Reading and writing JSON in Python

2. Reading and Writing JSON on the Server

2. Reading and Writing JSON on the Server

Reading and writing JSON in Clojure

Reading and writing JSON in F#

Reading and writing JSON with Node.js

Reading and writing JSON in PHP

Reading and writing JSON in Ruby

3. Using JSON in Simple AJAX Applications

3. Using JSON in Simple AJAX Applications

Introduction

Creating an XMLHttpRequest object

Making an asynchronous request for data

Sending JSON to your web server

Accepting JSON using Node.js

Getting the progress of an asynchronous request

Parsing the returned JSON

Issuing a web service request using Node.js

4. Using JSON in AJAX Applications with jQuery and AngularJS

4. Using JSON in AJAX Applications with jQuery and AngularJS

Introduction

Adding a dependency to jQuery to your web page

Requesting JSON content using jQuery

Sending JSON to your web server using jQuery

Getting the progress of a request using jQuery

Parsing the returned JSON using jQuery

Adding a dependency to AngularJS to your web page

Requesting JSON content using AngularJS

Sending JSON to your web server using AngularJS

Getting the progress of a request using AngularJS

Parsing the returned JSON using AngularJS

5. Using JSON with MongoDB

5. Using JSON with MongoDB

Introduction

Setting up MongoDB

Installing the MongoDB database driver for Node.js

Installing the express module for Node.js

Connecting to a MongoDB database using Node.js

Creating a document in MongoDB using Node.js

Searching for a document in MongoDB with Node.js

Updating a document in MongoDB with Node.js

Deleting a document in MongoDB using Node.js

Using REST to search MongoDB

Using REST to create a document in MongoDB

Using REST to update a document in MongoDB

Using REST to delete a document in MongoDB

6. Using JSON with CouchDB

6. Using JSON with CouchDB

Introduction

Installing and setting up CouchDB and Cradle

Connecting to a CouchDB database using Node.js and Cradle

Creating a CouchDB database using Node.js and Cradle

Creating a document in CouchDB using Node.js and Cradle

Setting up a data view in CouchDB with Node.js and Cradle

Searching for a document in CouchDB with Node.js and Cradle

Updating a document in CouchDB with Node.js and Cradle

Deleting a document in CouchDB using Node.js and Cradle

Using REST to enumerate CouchDB records

Using REST to search CouchDB

Using REST to upsert a document in CouchDB

Using REST to delete a document in CouchDB

7. Using JSON in a Type-safe Manner

7. Using JSON in a Type-safe Manner

Introduction

How to deserialize an object using Json.NET

How to handle date and time objects using Json.NET

How to deserialize an object using gson for Java

How to use TypeScript with Node.js

How to annotate simple types using TypeScript

How to declare interfaces using TypeScript

How to declare classes with interfaces using TypeScript

Using json2ts to generate TypeScript interfaces from your JSON

8. Using JSON for Binary Data Transfer

8. Using JSON for Binary Data Transfer

Introduction

Encoding binary data as a base64 string using Node.js

Decoding binary data from a base64 string using Node.js

Encoding and decoding binary data as a base64 string using JavaScript in the browser

Encoding data as BSON using Json.NET

Decoding data from BSON using Json.NET

Using a DataView to access an ArrayBuffer

Encoding and decoding base64 using an ArrayBuffer

Compressing object-body content from a Node.js server built using the express module

9. Querying JSON with JSONPath and LINQ

9. Querying JSON with JSONPath and LINQ

Introduction

Using the JSONPath dot-notation to query JSON documents

Using JSONPath bracket-notation to query JSON documents

Using JSONPath scripting to construct more complicated queries

Using JSONPath in your web application

Using JSONPath in your Node.js application

Using JSONPath in your PHP application

Using JSONPath in your Python application

Using JSONPath in your Java application

Using JSONPath with SelectToken to query for JSONPath expressions in your C# application

Using LINQ with Json.NET to query JSON in your C# application

10. JSON on Mobile Platforms

10. JSON on Mobile Platforms

Introduction

Parsing JSON on Android

Generating JSON on Android

Parsing JSON on iOS in Objective-C

Generating JSON on iOS in Objective-C

Parsing JSON on iOS using Swift

Generating JSON on iOS using Swift

Parsing JSON using Qt

Generating JSON using Qt

Index

Index

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Generating JSON on iOS in Objective-C

You can also use the NSJSONSerializer class to serialize NSDictionary or NSArray; simply use the dataWithJSONObject method.

How to do it…

Here's a simple example assuming that data is NSDictionary you want to convert to JSON:

NSError *error;
NSData* jsonData = [NSJSONSerialization
dataWithJSONObject: data
options: NSJSONWritingPrettyPrinted
error: &error];

How it works…

The dataWithJSONObject:options:error method can take NSArray or NSDictionary and returns an NSData blob with the encoded JSON of the collection you passed. If you pass kNilOptions, the JSON will be encoded in a compact manner; for pretty-printed JSON, pass the option NSJSONWritingPrettyPrinted instead.

See also

Apple's documentation for the NSJSONSerialization class is at https://developer.apple.com/library/ios/documentation/Foundation/Reference/NSJSONSerialization_Class/index.html.

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