go-sdk/mcp/util.go
Robert Findley 964574b818
mcp: allow any value for schemas (#517)
As discussed at length in
https://github.com/modelcontextprotocol/go-sdk/issues/518, coupling our
schema fields to
jsonschema.Schema limits our user's ability to use a different schema
package, and makes it impossible for our client to talk to some
backends.

This CL relaxes the type of `*jsonschema.Schema` fields to be of type
`any`, which is a breaking change but is unlikely to affect most server
code. (It *is* a nontrivial change for clients).

Fixes https://github.com/modelcontextprotocol/go-sdk/issues/518
2025-09-26 11:55:54 -04:00

43 lines
906 B
Go

// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package mcp
import (
"crypto/rand"
"encoding/json"
)
func assert(cond bool, msg string) {
if !cond {
panic(msg)
}
}
// Copied from crypto/rand.
// TODO: once 1.24 is assured, just use crypto/rand.
const base32alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"
func randText() string {
// ⌈log₃₂ 2¹²⁸⌉ = 26 chars
src := make([]byte, 26)
rand.Read(src)
for i := range src {
src[i] = base32alphabet[src[i]%32]
}
return string(src)
}
// remarshal marshals from to JSON, and then unmarshals into to, which must be
// a pointer type.
func remarshal(from, to any) error {
data, err := json.Marshal(from)
if err != nil {
return err
}
if err := json.Unmarshal(data, to); err != nil {
return err
}
return nil
}