Your issue seems related to the handling of numeric route parameters in the URL in a %CSP.REST dispatcher setup.

According to the documentation:

1. When you define route parameters in a URL by prefixing them with a colon (:), these parameters are passed to the corresponding ObjectScript method. The issue might be with the parameter data type in your method definition. Numeric route parameters can sometimes cause unexpected behavior if the parameter types do not align as expected in the method signature. Ensure the route method declaration matches the expected type or uses %String for flexibility [1][1].

2. It's also recommended that names of REST route arguments in the URL be consistent in order and match the method arguments for proper mapping [3].

For example, your sub-dispatcher has the route <Route Url="/:id" Method="GET" Call="NewsGetItem"/>. Ensure the NewsGetItem method signature correctly handles the id parameter, such as:

ClassMethod NewsGetItem(version As %Integer, id As %String) As %Status
{
    Write id
    Quit $$$OK
}

This declares id as a %String, ensuring compatibility with URL parameters irrespective of their values [1][1][3].

If issues persist, consider debugging as per REST documentation and testing multiple parameter scenarios [1][1][3].

Sources:

The issue you are experiencing with VS Code when trying to import and compile CSP files using the ObjectScript plugin may stem from several possible reasons:

1. Server-Side Editing Configuration:

   • The VS Code InterSystems ObjectScript integrated environment is designed to work effectively with server-side editing when configured correctly. If you are attempting to handle CSP files, ensure that the isfs mode is configured properly in your workspace settings. This allows the CSP files to be edited directly on the server without needing to download them locally. [1][2]

2. CSP File Compatibility:

   • Editing and compiling .csp files is supported when the files are part of a web application with a path starting with /csp and are properly associated with the namespace on the server. If the web application does not meet these conditions, it could explain why changes are not applied. [1]

3. Import Process:

   • make sure that your import process works correctly for .csp files. If importing these files results in no visible effects, as was noted in some Atelier workflows, it might be that the file associations or namespace mappings between source and server are misconfigured. Align your setup as per the documented relationship between .csp files and the respective generated .cls class configurations, adjusting paths and parameters in the code accordingly. [3][4]

4. Role and Access Restrictions:

   • Verify that the user account in use has the %Developer role since server-side interactions, including importing .csp files, may require these permissions. Although %All should suffice generally, access specifics might still cause blocks. [1]

5. Ability of VS Code Extension:

   • The Import and Compile functionality in VS Code's ObjectScript extension is specific for UDL-format exports, and it does not natively support direct .csp file handling for source-level operations unless enhanced by other internal setups explained by best-practices [5].

Recommendations:
- Configure isfs for server-first file handling for .csp.
- Check or redefine role dependencies granting dev write areas setups esc deadline ordered

Sources:

The issue arises from attempting to deserialize large data in a FHIR Binary resource that exceeds the maximum local string length (3641144 characters). InterSystems IRIS signals a <MAXSTRING> error when object string data exceeds this limit but commonly offers solutions as follows:

1. ObjectStream Usage:
   You can use the %Stream class (e.g., %Stream.DynamicBinary for binary data or %Stream.DynamicCharacter for characters) to handle very large strings. Change the Binary class property that currently holds data using %String format to %Stream. This avoids exceeding the maximum length in memory and limits signal triggers caused by JSONAdapter calling deprecated %FromStream at dynamic fields.[1]

   Re-creation example:

   • Conversion workaround steps:
     Appropriate substitution methods e.g.:

   -For managing the actual parsed content:

     zConvertStream+ INSTEAD workaround binary first parsing+:

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To address the issue with <MAXSTRING> in the FHIR Binary resource involving Base64 encoded content, the following solutions are recommended:

1. Use Streams Instead of Strings:
   Update your code to use stream classes (%Stream.DynamicBinary or %Stream.DynamicCharacter) for handling large data fields instead of %Binary (which maps to %String). Using streams allows handling strings that exceed the maximum length allocated for ObjectScript strings [2][3].

   This can be implemented by defining a method to set the Binary resource using streams, as shown:

   ClassMethod SetBinaryR4(json As %DynamicObject) {
      Set obj = ##class(HS.FHIR.DTL.vR4.Model.Resource.Binary).%New()
      Set obj.contentType = json.contentType
      // Convert large data field to stream
      Set dataAsStrm = json.%Get("data",,"stream")
      Set obj.data = dataAsStrm
      Set obj.id = json.id
   }
   

   This approach bypasses <MAXSTRING> errors by storing the large content (Base64 encoded) in memory-efficient streams [3].

2. Refactor %GetNext Usage:
   Modify all usages of the %GetNext method in your adapter classes. The %GetNext(.key, .value) method triggers a <MAXSTRING> error if the value exceeds the string length limit. Instead, use the three-argument form %GetNext(.key, .value, .type). This ensures that the returned value is a %Stream object when the content type is "string" [2][3].

   Example Update:

   While iter.%GetNext(.Name, .Value, .Type) {
      If .Type="string" {
          // Handle value as stream
      }
   }
   

3. Workflow for Transformations:
   Create a workaround where:

   • You replace large Base64 strings in the JSON with placeholders.
   • Perform DTL transformations excluding large strings.
   • Reintroduce Base64 strings using %Stream just before submission to the FHIR server [3].

Implementing the above adjustments would eliminate the likelihood of encountering the <MAXSTRING> error while handling large FHIR Binary resources containing Base64 data.

Sources: