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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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8
mcp/example_progress_test.go
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@ -21,11 +21,11 @@ func Example_progressMiddleware() {
_ = c
}
func addProgressToken[S mcp.Session](h mcp.MethodHandler[S]) mcp.MethodHandler[S] {
return func(ctx context.Context, s S, method string, params mcp.Params) (result mcp.Result, err error) {
if rp, ok := params.(mcp.RequestParams); ok {
func addProgressToken[S mcp.Session](h mcp.MethodHandler) mcp.MethodHandler {
return func(ctx context.Context, method string, req mcp.Request) (result mcp.Result, err error) {
if rp, ok := req.GetParams().(mcp.RequestParams); ok {
rp.SetProgressToken(nextProgressToken.Add(1))
}
return h(ctx, s, method, params)
return h(ctx, method, req)
}
}