bf608eeeae
Add support for all content types, and formalize the conversion of content to and from the wire format (as a discriminated union). Change-Id: I93678ce98c02176a524d2c82425fb1267ad68bf0 Reviewed-on: https://go-review.googlesource.com/c/tools/+/669135 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Jonathan Amsterdam <jba@google.com> Auto-Submit: Robert Findley <rfindley@google.com>
42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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package protocol
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import (
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"encoding/json"
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"fmt"
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)
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// Content is the wire format for content, including all fields.
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type Content struct {
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Type string `json:"type"`
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Text string `json:"text,omitempty"`
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MIMEType string `json:"mimeType,omitempty"`
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Data string `json:"data,omitempty"`
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Resource *Resource `json:"resource,omitempty"`
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}
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// Resource is the wire format for embedded resources, including all fields.
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type Resource struct {
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URI string `json:"uri,"`
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MIMEType string `json:"mimeType,omitempty"`
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Text string `json:"text"`
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Blob *string `json:"blob"` // blob is a pointer to distinguish empty from missing data
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}
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func (c *Content) UnmarshalJSON(data []byte) error {
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type wireContent Content // for naive unmarshaling
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var c2 wireContent
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if err := json.Unmarshal(data, &c2); err != nil {
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return err
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}
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switch c2.Type {
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case "text", "image", "audio", "resource":
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default:
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return fmt.Errorf("unrecognized content type %s", c.Type)
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}
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*c = Content(c2)
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return nil
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}
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