.json

The bottom line is that JSON isn't some sort of magic bullet; it is, however, a great option for some very specific situations.

But to be truly multi-lingual we're going to want to be able to understand (parse) JSON, not just speak it.

With a data format as rich and capable of Atom, serializing to a format as simple and basic as JSON can be problematic at best.

On the other side of the JSON controller, the application can be hooked up to MySQL, PostgreSQL, an XML file repository, or nothing at all.

A better choice is to put the configuration values into a single JSON object and store the serialized string of this JSON object.

Now that I've got a servlet to pump out a list of Retweets in JSON format, I'm ready to connect that data to my dashboard web page.

To create the datastore you only have to create a model for it: a JSON file that defines the fields and options for those fields.

In a couple of articles, I'll spend a good amount of time on JSON, and then you'll be ready to choose between the two on your next app.

But JSON allows for a few extra constructs (particularly comments) that mean this will miss input from some less-than-careful JSON creators.

Since the grammar of JSON is fairly simple, you can implement such a parser easily without any noticeable performance difference.

If you scroll to the bottom of the page, you'll see that the information can be exported as CSV or JSON.

Simply send in an array of data (or even a simple string) to json_encode, and a JSON object will emerge (as shown in Listing 1).

The server side has to be able to understand a JSON-formatted string and produce a server-side object in order to proceed and save the data.

To do that, you will write a simple Groovy method that copies the field values in a JSON object into a chart URL.

I'll use the handle departureAirportText to write out the result of the JSON call in just a moment.

A JSON object like the one shown in Listing 1 can be inspected during development time using tools like FireBug or simple JavaScript alerts.

Within the JSON serialization, the language context can be captured by converting the xml: lang attribute into a field.

Instead of it returning JSON, as in the case of our data resource, we will have the resource return a reference to a view.

JSON4J can be used to convert an XML reply from a Web service into a JSON structure for easy use in an Ajax application.

In these HTTP responses, only the body of the returned response is shown, in JSON format.

You're also specifying JSON as the return type, which will make it easy to parse the data from JavaScript.

You used REST and JSON on the front end, meaning you can use a different UI kit, or you can easily hook up a mobile client.

Finally, whatever the results are, use the JSON converter from Grails to turn the list into a JSON object.

The updateCart function is called upon the return, and the JSON values are supplied in an associative array variable called results.

The return data could also be in the form of JSON objects (JSON is basically a protocol for defining objects in JavaScript code).

A JSON structure containing the name of the new fix and location of a PAK file is passed to the create method.

Providing such static screens was the primary objective of Ajax technology and you can accomplish this with JSON as well.

JSON Content Request: Remove active content from all String values in an inbound JSON object sent to any URIs.

You could have used XML for the data transfer, but JSON is slightly more efficient and easier to work with on the client.

The policy document is JSON-formatted, but the JSON is simple enough that we don't have to resort to any fancy libraries.

children is a JSON array that contains the names of the child directories that are part of the current parent.

These data files are again JSON files, like the Resource Model definition files, and they contain objects to be loaded into the model.

The invocation is by means of a JSON-RPC (JavaScript Object Notation-Remote Procedure Call).

While I'm at it, the JSON response will contain the URL to the user's image, name, and short biography.

Note: If you want more detail on the org. json or other JSON toolkits, e-mail me and let me know.

The JSON object includes both the "id" field and the "name" field for the record encoded as a JavaScript hash table.

Having a JSON formatted output improves the ease with which JavaScript components can use the feed output.

The final sanity check is to see if the JSON document was persisted to MongoDB, which you'll recall is running over at MongoHQ.

If XML had been designed for software development, it would have supported lists and maps and data types as JSON eventually did.

The uncompressed version is to send every part as an individual key in a JSON, this works but is inefficient and very hard on our system.

Upon submitting the form, an update function in the JSON servlet is called and synchronizes the database accordingly.

JSON is the chosen format to represent the data because we'll be using a rich Internet application (RIA) as a front end to the system.

Figure 3 shows what winds up in the Log after parsing the JSON array following a typical run of the application.

There are numerous third-party libraries available for converting Python objects to JSON and vice-versa, but we did not need them.

Server-side code must be factored out to application-specific services and a format (such as JSON) must be selected for data exchange.

So before you finish up, you need to take a look at a second way of dealing with these requests: JSON.

Most of the popular languages have JSON mechanisms that are as easy as this one to convert basic data structure into and out of JSON.

The resource handlers should have the same name as the resource models but a . groovy rather than . json file extension.

You convert the stream from the server into a string that you pass to the JSON parser.

JavaScript Object Notation (JSON) is a data interchange format used to represent data in the business logic running on browsers.

It then validates that it has proper type of JSON, and that the content-type response header is JSON.

You can then convert directly to this object to a JSON string and add it to the request as a parameter.

Notice how the data taken from the form is added directly to the request body as a JSON object; the implementation of zero. services.

Listing 3 shows a fragment of a JSON file used for the transformation.

Like the employee data, the organizational data is returned as a JSON string also.

Each GET invocation returns a JSON-formatted data representation of the status of the transaction being queried, as shown in Listing 5.

The bottom line is that our JSON representation is as complete as we need it to be given that we now have an HTTP-oriented solution.

The geonames. org geocoding service you used in " Grails services and Google Maps" offers JSON output as well as XML (see Resources).

After that, the demo_json. php file creates a few Smarty variables of various types: a string, a number, a boolean, and an array.

Regardless of the transport, the body of the request, such as an XML Document or JSON object, is passed as a parameter named 'param.

Your JSON document doesn't contain any markup, just the URLs and metadata for the images your JavaScript code turns into a slide show.

I saw some discussion recently about using JSON for secured data, and I'm not sure that everyone understands the risks.

The JSON basically looks like this: { "id" : "4d6baeb52a54f1000001" }.

You can also use Sitebricks to deliver XML and Json to GWT applications, just like you would to any other client service.

JSON4J can be used to format the data into a JSON data stream, which is then returned back to the client.

You can, of course, transform JSON into a stylable DOM object, but essentially that just means moving back to XML or (X)HTML.

First, within the callback, jQuery's each function iterates over the friends collection within the received JSON response.

In addition, JSON-formatted data tends to be more compact and efficient to transfer.

Since JSON is just plain text with a simple bracketed structure, many channels can exchange a JSON message.

Favor lightweight formats in general; the best are JSON and a character-delimited custom format.

To help debug errors, I used the JSON-RPC stand-alone client lib, as shown in Listing 20.

The script package format enables you to add a configuration file called cbscript. json to the root directory of the archive.

JsonML builds on the basics of JSON and enables you to model the user interface elements using JavaScript notation.

As stated above, any JavaScript instructions embedded within a JSON data block are executed immediately as the data block is interpreted.

By using just these two core features of PHP, it is possible to convert any arbitrary XML data into JSON.

Next, check if the request made includes raw HTTP post data; if it does, return a JSON-encoded response.

One of the big advantages of Groovy is its ability to easily parse XML and JSON without having to invest a lot of time writing parsing code.

Then you use Dojo's dojo. toJson function to turn this into a JSON string.

Other parts of the code contain information for constructing the JSON data stream that describes the file system.

The Restlet Framework supports major data formats like XML, JSON, and Atom using extensions to its core framework.

Determine the out-of-the-box support for common formats, including Atom, JSON, and MIME multipart data.

Document and Content Management Systems - as a document-oriented (JSON) database, MongoDB's flexible schemas are a good fit for this.

Usually an API is a way to get structured data, in XML or JSON format, out of an otherwise unstructured Web site.

You then assemble the parameters for the Web services call as an array, which you encode as a JSON string.

The server responses can be in any format that the client requires, including partial HTML, XML, plain-text, or JSON object.

Of course, if you're not familiar with the vagaries of XML, it might be better to parse out JSON.

The JSON object for a parent node might look like the following example.

Pyjamas development is a bit nascent, so it's good to have another way to test the JSON-RPC from another source.

If you recall from Figure 1, the JSON data contains an array for the children.

The JSON object (or more accurately, window. JSON) is part of the HTML 5 specification as a native object that is always present.

So while this particular example does not use any text outside of the ASCII range, JSON (and XML) work with international text.

This involves converting the JSON object into a string that can be put in the HTTP POST request body.

Many legacy applications and programming languages have native support for XML but don't have support for JSON as it's a newer technology.

So far, nothing too far out here if you're used to working with JSON.

Refer to Resources for more information about JSON and its potential uses as a data interchange format.

So you can simply use its parse method to safely parse the JSON data into a JavaScript object.

CouchDB databases store uniquely named documents and provide a RESTful JSON API that allow applications to read and modify these documents.

A JavaScript client application receives the JSON as an object, whereby values are referenced using a dot notation syntax.

Since you have removed all the Spring dependencies in previous steps, the only library JAR that needs to be available is JSON.

Like the employee data, a JSON string that contains the detailed organizational data is returned (Listing 3).

Name it rsvp. json and set its model to be invitation. json, as shown in Figure 6.

The REST handler currently supports JSON , but can be easily enhanced to support XML and other content types depending on requirements.

With the exception of one input value, everything on the form can be converted into the required JSON format rather easily.

You first returned JSON from a Grails controller in " Many-to-many relationships with a dollop of Ajax. "

The first method is to use a tool like Poster, a Firefox add-on that enables you to issue RESTful calls and see the returned JSON objects.

A simple Java model for constructing and manipulating data to be rendered as JSON.

Since we want to be good RESTafarian citizens, let's put together a simple framework that moves JSON data using all four verbs.

Think of this as JSON data, even though you can invoke code as well.

Then, your application can decode that JSON data and loop through it in any way necessary to display the content.

Listing 3 is an example of the status of a transaction representation formatted as a JSON string.

This is the outline of a JSON object with a single property named items, whose value is an array of objects.

The toolkit allows you to process JSON, XML, and text responses from Ajax services.

I mentioned earlier that you can use dojox. data to interact with your own JSON-based services.

In PHP, a pair of native JSON functions help you do a lot of heavy lifting (json_encode and json_decode).

When the method invocation completes, the service must reply with a response. The response is a single object serialized using JSON.

It functions by receiving HTTP PUT requests, each one containing a JSON document that indicates an account's location at a given time.

JSON is a data serialization format that you can eval by a JavaScript interpreter to create an object.

When you cache data on the client side using JSON, you update the data caching object every time the user clicks on the Add Vehicle button.

Finally, the JavaScript is output, defining Ext. app. REMOTING_API with the value set to the JSON representation of the $cfg variable.

If all is well, the string representation of the JSON object is converted to a JavaScript object using the eval JavaScript function.

The Virtual Application Builder takes the pattern that you created using information defined in the metadata.

We chose to discuss JSON here, since it has some security implications that we'll examine later in this article.

This makes representing something like a domain object quite simple, but don't let JSON's simpleness fool you.

In other words, we are replacing the resource properties document with a JSON object and using HTTP methods in lieu of WS-RP methods.

JSON Content Response: Remove active content from all String values in an outbound JSON object sent by any URIs.

These days, another format called JSON is very popular in overcoming some of these issues.

Apache CouchDB is an open source document-oriented database management system that stores data as JSON objects.

It converts keys in the map entries of JSON objects to Clojure keywords, which are more idiomatic to work with in Clojure.

Basically, the user's changes are collected in edit mode and a JSON object is used to represent these changes.

As referenced in A typical JSON scenario, many Web services provide multiple formats to display the information.

Notice that you get the IP address, system name, and system's owner name from the JSON object passed to your service.

I'd then perhaps embed additional account information into the corresponding JSON document describing the account's location.

One of the loaded scripts, json2. js, is a popular library that provides useful code for JSON processing.

In this article, you saw how JSON can be a viable alternative to XML when making Ajax requests.

This transmitted data is plain text and, therefore, can be in a number of different formats, such as XML, HTML, JSON, or just plain text.

To compare JSON and XML, first look at an abbreviated version of the NWS XML data for Richmond, Virginia, shown in Listing 1.

The data is fetched using RESTful web services and the mode of data interchange between the client and the service provider is JSON.

A provider services these requests by returning XML- or JSON-encoded representations of the requested content items.

The client application is not aware that incoming and outbound JSON is being transformed into XML on the server side in the database.

This article sums up the need for XML-to-JSON conversion at the middleware server layer.

Therefore, JSON data can be processed by almost any standard JavaScript function or statement.

This snippet of JavaScript code assigns an abbreviated version of the JSON data to the JavaScript variable weather.

New message formats are supported: delimited, comma separated values (CSV), fixed width and JavaScript Object Notation (JSON).

Exhibit works on JSON input following a simple set of conventions.

JSON is a protocol designed to allow middleware to create objects formatted in a JavaScript native format.

The punchline is that you can use JSON to send a JavaScript object graph over the network in an Ajax server's response.

It simply makes a request back to the server for a list of photos rendered as JSON.

For simplicity, the server communications are not included; instead, the JSON data is provided as a string variable named serverresponse.

If your Ajax project involves navigating lots of complex server responses on the client, JSON may well appeal to you.

JSON with Padding (JSONP) is a way to bypass the same-origin policy by using JSON in combination with the tag, as shown in Listing 1.

As you can see in Listing 2, in HTTPBuilder it's simple to parse JSON and ensure that the ok element's value is indeed true.

As you work on generating your JSON, you may find that you have a problem parsing the code from within your browser-based application.

The localized values are created as objects in JSON format that are part of individual localized JavaScript files.

I then defined a property (asJSON) pointing to an inner function whose job it is to hand-jam a string representation of my JSON message.

A remote method is invoked by sending a request to a remote service. The request is a single object serialized using JSON.

The request will be received by the back end, which in turn will send back a JSON response file containing the requested data to the device.

The JSON and XML data can contain the information to be displayed by the widget.

If you compare both the values, you will find that JSON returns only a string value without the overhead of XML node processing.

Similar to the value provider you created for the auto-complete control, you create a Servlet to return a JSON array containing the values.

The wrapper object Dishy allows you to do this easily.

This article covers the basics of REST and JSON, and shows you one method of setting up the controller.

This step takes the items array declared in the JSON and uses it to dynamically build an HTML table showing the statistics details.

The response to this request is an Atom or JSON feed containing a list of matching users, together with their name and Google ID.

As you can see, the JSON data is retrieved from a static file called example. sql.

By default the data is output in RSS format, but other data formats, including JSON, can be specified in the URL.

JSON is completely dynamic and lets you change the way you represent data in the middle of your JSON structure.

Once that PHP array is fully constructed, then the Services_JSON encoder can easily convert it to JSON-formatted data.

You'll use a policy to control uploads; the policy is a set of rules expressed in the JSON data format.

A Java object model for constructing and manipulating data to be rendered as JSON.

The pattern of having individual objects represent themselves as JSON is helpful when building aggregate JSON documents.

In this case, you'd download json. zip from the JSON Web site and add the included source files to your project's build directory.

I've just created a JSON representation of a parking ticket and called it "ticket. "

This article, until now, has showed how you can call a JavaScript function with static JSON data as a parameter.

However, you still have to employ the DOM to actually populate the output with the information that was loaded from the JSON file.

This code generates the following JSON data shown in Listing 8, assuming an error condition is present.

The scrollable columns of the horizontal dimension are defined by the JSON array cells.

The to-do list data is embedded into the page, but it's transported around in JSON form, maintained in the taskStorage variable.

You can put these limits into a JSON metadata object.

This simple test page allows you to insert, update, delete, and query JSON data, stored as JSONx in your database.

For this type of interaction, you can use one of the many structured data standards, such as JavaScript Object Notation (JSON) or XML.

Several other attributes named sync, json, and cpr let you specify various features of the generated code.

The Flex application calls on a JSON object registered at the back-end servlet in the portal application.

My application currently has one reachable endpoint that only accepts a JSON request, which will require some tools to fashion.

This is done by taking the contents of the HTTP POST and converting them into a JSON object.

Your system architects can choose whatever interchange format they want, but these days, it's typically XML, JSON, or simple text.

JavaScript Object Notation, usually called JSON, is a lightweight data-interchange format.

For very large datasets, it's hands down the fastest format, beating out even natively executed JSON in parse speed and overall load time.

When using this technique, the while(1); statement must be stripped at the client before using the JSON data to avoid an endless loop.

This section explores a rather intuitive but non-isomorphic mapping between XML and JSON so you can understand such differences.

This function reads the JSON-structured content from the JavaScript object rowData, as shown in Listing 3.

You don't need to manually convert the Java object into a JSON object.

Note that the JSON response contains a key element, which describes why a particular document was emitted.

JSON. org: Visit this home page that also serves as tutorial and specification for this very simple data format.

Only JEST can reinterpret the enhanced JSON representation to recreate an object graph with cyclic references.

After all, if you can store data in JSON format, it makes the life of a JavaScript developer that much easier.

You only need to use the json_encode function to turn the returned array into JSON code.

When you need to represent a set of values, JSON starts to be not only more readable, but less verbose.

Not surprisingly, you can also use this utility class to output the SELECT result bindings as JSON, as shown in Listing 11.

JSON reduces the HTTP traffic by introducing a new format for interchanging data between server and client applications.

It simply creates a JSON object from the string data, which is the result of the GET call.

The idea of JSON is to make the response a specific data structure that can be easily parsed by the JavaScript code.

Notice this jQuery code is calling a JSON method at the location of our controller.

A variety of MIME types are defined that can be used to deliver a resource in XML, JSON, or HTML format.

JSONx is a suitable format for systems that deal with XML data but need to be extended with support for JSON.

The corresponding Instant UI web page code to read the JSON formatted output is in Listing 9.

The ability to use JSON as a message format further simplifies the interaction.

There are many ways to turn Atom 1. 0 into JSON, and several people have already written XSLT scripts, of varying quality, for the purpose.

Listing 25 shows the JSON serializations for each of these content forms.

It melds the simplicity of the JSON markup with the DOM as the target format.

The latter approach is actually my preference because then it treats the XML-based and JSON (text-based) formats equally.

Finally, cURL updates the work item with all of the data in a JSON form.

The key step in the preceding code is providing the actual object as the JSON output to the client.

For the purpose of this article, the JSON conversion is assumed to occur outside the steps described here.

However, JSON document-oriented database management systems have started to appear.

I'll use that for now to demonstrate creating and finding documents, which involves writing some JavaScript and JSON.

To view the results in a JSON data format, append the URL with &format=json and press the Enter key.

The incoming object in the request. json. output assignment is provided as an argument in the toJson function.

Find all neighbors of a country (returning an XML file or JSON feed).

If all is well, the string representation of the JSON array is converted to an array using the eval JavaScript function.

After this element has been found, the elements within this entry are iterated through with JSON pairs being formed for each statistic.

To query information from a collection, you can use various comfort-inducing query methods via a RESTful JSON API.

In this case, I've simply updated the saveLocation with some code to place a simple JSON document onto a queue named "locations_queue" .

Ajax drives you into thinking how you provide data to a page. JSON formatting.

It contains full copies of the XML and JSON data feeds and gives the user the option of parsing either one.

Now that we have serialized our object, we can use it in any number of JSON functions in an Ajax application.

Consequently, Ajax Web services frequently return results in plain text, HTML snippets, or JSON.

The knowledge base management module constructs a information tree by JSON object of JavaScript.

JSON is native for the JavaScript language, but needs additional coding on the Java server side.

JSON-RPC is a remote procedure call protocol that uses JSON to encode and marshal arguments and return types.

For this exercise, the Dojo Web page will request a JSON data format when calling this operation.

If you strip that down to the bare essence of the data, you can encode the same event using JSON.

Our design reads the REST URI from a JSON file depending on the corresponding REST key.

The JSON4J library provides a set of classes for easily constructing JSON data formats.

For instance, most back-end processes require an XML document while a front-end process may require a JSON object.

One simple way to convert this data is to create general parser code that converts JSON data into an Objective-C application data object.

The last approach uses JSON to avoid the need for proxies.

A transformer transforms the JSON output into even more natural objects for easy consumption.

Parsing JSON formatted resources requires the inclusion of JSON libraries.

Many Ajax developers prefer handling data directly using JSON in the browser-side JavaScript code.

In this appendix, we show the results of issuing two requests to Twitter using curl, one in JSON and one in friendly XML.

This uses RoR's built-in support for JSON to respond to a URL that ends with . json.

With JSON, you call a simple function and get your data, formatted and ready for use.

You can refer to the org. json package documentation (links in the Resources section) for more details.

Let's have a look at what would happen if we converted the above XML document into a JSON object (see Listing 2).

The response will return a simple JSON doc rather than a simple text string.

Then, the PHP example executes the demo_json. tpl template to produce the JSON response.

Specifically, you create a JSON data stream on the client that contains the methods to invoke and the parameters.

In addition, the data received in JSON format will be readily treated as a JavaScript native data structure in the browser-side code.

The handleData function is implemented to handle JSON data, but you can customize it to handle other data types if you choose.

The long and short is that JSON is not safe in any system that uses cookies for authentication.