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mcp: introduce Requests (#267)

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Handlers and client/server methods take a single request argument
combining the session and params. This slightly simplifies the signature
for handlers, since there is no longer an often-ignored session
argument.

But more importantly, it opens the door to adding more information in
requests, such as auth info and HTTP request headers.

For #243.
This commit is contained in:
Jonathan Amsterdam 2025-08-12 17:49:50 -04:00 • committed by GitHub
commit 6e03217c83
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1 changed files with 517 additions and 380 deletions
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4
mcp/sse_example_test.go
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@ -18,10 +18,10 @@ type AddParams struct {
X, Y int
}
func Add(ctx context.Context, cc *mcp.ServerSession, params *mcp.CallToolParamsFor[AddParams]) (*mcp.CallToolResultFor[any], error) {
func Add(ctx context.Context, req *mcp.ServerRequest[*mcp.CallToolParamsFor[AddParams]]) (*mcp.CallToolResultFor[any], error) {
return &mcp.CallToolResultFor[any]{
Content: []mcp.Content{
&mcp.TextContent{Text: fmt.Sprintf("%d", params.Arguments.X+params.Arguments.Y)},
&mcp.TextContent{Text: fmt.Sprintf("%d", req.Params.Arguments.X+req.Params.Arguments.Y)},
},
}, nil
}