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#JSON

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JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write.

All time
Question
· Aug 22, 2016
$fromJSON and MAXSTRING

Hi, all.
I have CSP application and it needs to get and process data from ajax request with json-content. JSON can be very big.
In this case:
TRY
{
Set RequestObj = ##class(%Object).$fromJSON(%request.Content.Read())
} CATCH(Exception) {
Set Status=Exception.AsStatus()
}
I get just part of getting JSON and validate error in $fromJSON.
If I try to read it all in cycle:
TRY
{
While (%request.Content.AtEnd = 0) {

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Hello,

I am trying to use %ZEN.proxyObject to send out in JSON format so I do:

set tProxyRequest = ##class(%ZEN.proxyObject).%New()
set tProxyRequest.notanumber = "28001"
set tProxyRequest.aboolean = "true"

set tBody = ##class(%GlobalCharacterStream).%New()
do ##class(Ens.Util.JSON).ObjectToJSONStream(tProxyRequest,.tBody,"aelotwu")
w tBody.Read()

and I get:

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I am using studio 2015 version which does not have dynamic objects and I need to read xml and convert that to a json I have managed to come close to json string but with little difficulties .I need to be able to identify the root element and specify where to put braces between objects anyone with any idea is welcome he is my code so far

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Question
· Dec 19, 2016
HL7 Section to JSON

Hi all,

I'm trying to convert a HL7 section to a XML or JSON string.

We need to save the content of PID section into a SQL Column, therefore we need to convert it into a XML o JSON string

is there any easy way to convert it?

I've tried to convert it directly into a DTL, but all my attempts have been unsuccessful

Best regards,

Francisco Lopez

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Question
· Jun 11, 2021
Parsing null values in JSON

Hello everyone,

I'm creating a REST API with InterSystems Ensemble.

I already have a POST route that parses JSON content into an object defined in a class.

To parse the JSON content, I'm using the JSONStreamToObject method in the Ens.Util.JSON class

Here is how I use it:

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In this article I'll describe how to set up web services and/or REST services using EWD 3.

Since EWD 3 is designed to be modular, you can construct the environment that exactly meets your needs, but for much of the time you'll probably find that the pre-built EWD 3 ewd-xpress super-module does most of what you need because it hooks together all the core EWD 3 and other building-blocks you'll need:

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Hi All,

I use SQL function JSON_OBJECT to get data as a JSON object.

However, sometimes I get error with function JSON_OBJECT when values contain [, ], { or }.

Error:

[SQLCODE: <-400>:<Fatal error occurred>]

Unexpected error occurred in JSON_OBJECT() function execution of <JSON_OBJECT>.%FromJSON().Parsing error

For example,

Query: SELECT JSON_OBJECT('idSQL':id, 'content':content) FROM DocBook.block

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Okay, we've got a quite useful way to very easily Import and export our objects as JSON, similar to what we already had before for XML.

So, It's a %JSON.Adaptor. But the issue here I faced with, working with Stream properties.

I have an example, when I generate an object, with stream binary stream properties. Export and Import the same, but getting the different resulting objects, depends on the original size of streams.

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At the end of our last lesson, we ended with our page displaying a nice (but garish) Angular Material Toolbar, and our Widget data displaying in a list of Material cards. Our page feels a bit static, and we already know that the large number of Widgets that we will be dealing with will not be especially usable on a static list. What can we do to help?

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Referencing this post:

https://community.intersystems.com/post/producing-json-sql

I'm not sure how to actually interact with the result set I get from doing something like this. I want to return something like:

[{"field1":1, "field2":2}, {"field1":2, "field2":10}]

I'm finding it very difficult to get it in this format, since %Print appends a newline onto the end of the {} object it prints.

Here's the closest I've gotten:

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How can I prevent large number truncation when using the DynamicObject and DynamicArray classes to create JSON in objectscript and then parsing the result in javascript. Are there any global settings that configure the output when using these classes?

I am looking at converting to the new DynamicObject and DynamicArray classes to build JSON. Our current (homegrown) JSON library forces string representation of numbers too long because of errors we were seeing with long numbers being truncated on the client, I am hoping to accomplish the same with the new classes.

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How can you allow computers to trust one another in your absence while maintaining security and privacy?

“A Dry Martini”, he said. “One. In a deep champagne goblet.”
“Oui, monsieur.”
“Just a moment. Three measures of Gordons, one of vodka, half a measure of Kina Lillet. Shake it very well until it’s ice-cold, then add a large thin slice of lemon peel. Got it?”
"Certainly, monsieur." The barman seemed pleased with the idea.
Casino Royale, Ian Fleming, 1953


OAuth helps to separate services with user credentials from “working” databases, both physically and geographically. It thereby strengthens the protection of identification data and, if necessary, helps you comply with the requirements of countries' data protection laws.

With OAuth, you can provide the user with the ability to work safely from multiple devices at once, while "exposing" personal data to various services and applications as little as possible. You can also avoid taking on "excess" data about users of your services (i.e. you can process data in a depersonalized form).

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When using the JSON_OBJECT() function in Caché SQL on a %String property that contains JSON syntax, it converts the %String into a JSON object instead of escaping it as a string literal. How can I prevent this? (without ridiculous hacks like "add a space to the beginning of the value" as we don't always know which properties will contain these values and I certainly don't want to have to check for nulls and add/remove a space every single place this value is used in the application)

I don't want these strings automatically marshalled into JSON objects.

For example:

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Foreword

InterSystems IRIS versions 2022.2 and newer feature the ability to authenticate to a REST API using JSON web tokens (JWTs). This feature enhances security by limiting where and how often passwords transfer over the network in addition to setting an expiration time on access.

The goal of this article is to serve as a tutorial on how to implement a mock REST API using InterSystems IRIS and lock access to it behind JWTs.

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If you're interested in building a browser-based CRUD application for maintaining data on IRIS, check out the detailed, step-by-step tutorial at:

https://github.com/robtweed/qewd-microservices-examples/blob/master/WIND...

To get a preview of the application you'll build in the tutorial, along with background on its technology stack, watch this video:

https://www.youtube.com/watch?v=d-NICYqv_2s

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I am trying to use the automated unittest class for a %CSP.Rest service.

So my Unittest code set's %request and %response from %CSP.Req/resp respectively

I build a tProxy with the fields I need for the post and set it %ToJson... I have tried seting %request.Content = tProxy (and not)

I call the method for the post url directly...

When that method calls %fromJson to set an object with the info. I passed...

- when I don't set %request.content.. I get a error '5035 - premature end of data code 12'

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Question
· Apr 11, 2022
MAXSTRING limit issue

MAXSTRING (longstring) is enabled.

We have a Class containing a property definition

Property SettingsJSON As %Text(MAXLEN = 3600000)

The property is used for storing a string of JSON data however in some cases we get a Cache error: %SaveData error when trying to save a string of JSON a lot less than maximum "allowed" length, any ideas anyone?

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Article
· Jan 12, 2022 12m read
JSON Schema applied to InterSystems IRIS

The JSON is a data document free of types and validation rules. However, in some scenarios it is important that the JSON document has type and business rules validation, especially in interoperability scenarios. This article demonstrates how you can leverage a market-defined JSONSchema technology that is open for everyone to use and do advanced validations.

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