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Overhaul of Resources (#125)

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* Supporting resource templates with read resource callback

Fixes #123

* Aligning the resource data structures with the 2024-11-05 schema

- Introducing separate classes for Text and Blob ResourceContents
- Custom JSON converter to allow those types to be returned, making it easier to follow the type system against the spec
- Updated tests

* Apply suggestions from code review

Co-authored-by: Stephen Toub <stoub@microsoft.com>
Co-authored-by: Peder Holdgaard Pedersen <127606677+PederHP@users.noreply.github.com>

* Putting files back where they belong

* Adding an internal constructor to prevent overloads

* Addressing feedback

* Apply suggestions from code review

Co-authored-by: Stephen Toub <stoub@microsoft.com>

* Update src/ModelContextProtocol/Protocol/Types/ResourceContents.cs

* Addressing feedback

---------

Co-authored-by: Stephen Toub <stoub@microsoft.com>
Co-authored-by: Peder Holdgaard Pedersen <127606677+PederHP@users.noreply.github.com>
This commit is contained in:
Aaron Powell 2025-03-31 13:45:03 +11:00 • committed by GitHub
commit 3c0679e92b
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1 changed files with 290 additions and 49 deletions
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19
src/ModelContextProtocol/AIContentExtensions.cs
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@ -39,11 +39,7 @@ public static class AIContentExtensions
}
else if (content is { Type: "resource" } && content.Resource is { } resourceContents)
{
ac = resourceContents.Blob is not null && resourceContents.MimeType is not null ?
new DataContent(Convert.FromBase64String(resourceContents.Blob), resourceContents.MimeType) :
new TextContent(resourceContents.Text);
(ac.AdditionalProperties ??= [])["uri"] = resourceContents.Uri;
ac = resourceContents.ToAIContent();
}
else
{
@ -62,9 +58,12 @@ public static class AIContentExtensions
{
Throw.IfNull(content);
AIContent ac = content.Blob is not null && content.MimeType is not null ?
new DataContent(Convert.FromBase64String(content.Blob), content.MimeType) :
new TextContent(content.Text);
AIContent ac = content switch
{
BlobResourceContents blobResource => new DataContent(Convert.FromBase64String(blobResource.Blob), blobResource.MimeType ?? "application/octet-stream"),
TextResourceContents textResource => new TextContent(textResource.Text),
_ => throw new NotSupportedException($"Resource type '{content.GetType().Name}' is not supported.")
};
(ac.AdditionalProperties ??= [])["uri"] = content.Uri;
ac.RawRepresentation = content;
@ -79,7 +78,7 @@ public static class AIContentExtensions
{
Throw.IfNull(contents);
return contents.Select(ToAIContent).ToList();
return [.. contents.Select(ToAIContent)];
}
/// <summary>Creates a list of <see cref="AIContent"/> from a sequence of <see cref="ResourceContents"/>.</summary>
@ -89,7 +88,7 @@ public static class AIContentExtensions
{
Throw.IfNull(contents);
return contents.Select(ToAIContent).ToList();
return [.. contents.Select(ToAIContent)];
}
/// <summary>Extracts the data from a <see cref="DataContent"/> as a Base64 string.</summary>