AllAccepted answers
David Hockenbroch · Sep 24, 2021

MAXSTRING usually indicates that you're exceeding the maximum possible length of a string somewhere. Are you sure it's a problem with the %Stream.GlobalCharacter, and not a different string variable in your program? Global character streams shouldn't have that problem.

You can see what the maximum length of a string is on your system by opening a terminal and running:

write $SYSTEM.SYS.MaxLocalLength()

David Hockenbroch · Aug 19, 2021

That's telling you the URL you're requesting is too long, not the request body. If it was the request body that was too big, that'd be a 413, not a 414. If you're getting that when your form contains a very long entry, you're probably somehow converting the request to a get, not a post, request. Can we see the code for your form as well as how it's being submitted?

David Hockenbroch · Jul 27, 2021

I've had some time to try this now. Here are steps that worked for me:

set myrequest = ##class(%Net.HttpRequest).%New()
set myrequest.Server = "<server ip or domain here>"
set myrequest.Port = "<server port here if it isn't 80>"
set myrequest.Location = "</path/to/rest>"
do myrequest.EntityBody.Write("<your json here>")
do myrequest.Post()
set mydata = myrequest.HttpResponse.Data.Read()

At that point, the data returned in the response should be in mydata.

Depending on your specific API, you made need to take additional steps for authentication, and you may need to use myrequest.Get() or myrequest.Put() instead of myrequest.Post().

If you need to set parameters, you use the SetParam method of the HttpRequest. For example, if you're using the very most basic way to authenticate to a Cache instance, you do that by specifying a CacheUserName and a CachePassword as parameters as follows any time before your post/put/get:

do myrequest.SetParam("CacheUserName","<your username here>")
do myrequest.SetParam("CachePassword","<your password here>")
David Hockenbroch · Jul 27, 2021

I'm about to go down the same path here. I have a rough idea of what I need to do. I'm going to try to use the %Net.HttpRequest object and do at least the following steps:

1. Create a new %Net.HttpRequest object

set myrequest = ##class(%Net.HttpRequest).%New()

2. Set the server

set myrequest.server = "www.whatever.com"

3. Set the locatoin

set myrequest.location = "/path/to/rest"

4. Create a global binary stream.

5. Write json data to the stream.

6. Use the stream as the EntityBody for the HttpRequest.

7. Call the get, put, or post method of the HttpRequest object to consume.

8. Use the HttpRequest's HttpResponse object to check the response

David Hockenbroch · Jul 19, 2021

Somewhere in your button tag, you have onselect= something. Buttons don't have an onselect, but even if they did, I'm guessing that's not the event you actually want. onselect happens when a user highlights text within a control, like in a text input.

If you're trying to set what happens when the user clicks the button, that's onclick.

If you're trying to set what happens when the user selects the button but doesn't click it (say by pressing tab until the button is highlighted) that's onfocus.

David Hockenbroch · Jul 13, 2021

ObjectScript variables are untyped, so preserving the type isn't necessary.

You'll build the list by adding your MyPackage.MyClass objects to it, then you'll return the %ListOfObjects, then you'll use that list's methods to manipulate those objects. For instance, set mything = mylist.GetAt(1) will give you an object that is identical to the MyPackage.MyClass object you put in the list with all of its properties an methods.