Change the error code returned by ResourceNotFoundError from -32002 to
-32602 (jsonrpc.CodeInvalidParams), aligning with
[SEP-2164](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2164).
* Not gated with a protocol version check, because the previous error
code was never formally specified and the behaviour varied across SDKs.
* In case clients which rely on the old error code exist, the previous
behaviour can be restored with `MCPGODEBUG=customresnotfounderrcode=1`.
* `CodeResourceNotFound` deprecated since its only purpose going forward
is backward compatibility. The new code should use
`jsonrpc.CodeInvalidParams` directly.
* `CodeResourceNotFound` changed to `var` so it can stay in sync with
`ResourceNotFoundError` and existing code doing `code ==
mcp.CodeResourceNotFound` keeps working in both the default and compat
modes.
Expose the jsonrpc.Error type to allow access to underlying JSON-RPC
error codes. Also, expose common JSON-RPC error codes in the jsonrpc
package, and MCP error codes in the mcp package.
Also, implement support for the MCP URL elicitation required error
(-32042), enabling servers to request out-of-band user authorization and
clients to automatically handle these requests with retry logic.
Server-side:
- Add CodeURLElicitationRequired constant
- Add URLElicitationRequiredError() constructor.
Client-side:
- Add urlElicitationMiddleware to intercept URLElicitationRequired
errors and retry calls.
- Update callElicitationCompleteHandler to signal waiting operations.
- Fix capability advertisement to support both form and URL modes.
Fixes#452Fixes#623
Replace all occurrences of ServerRequest[*CallToolParams] and other
concrete instantiations with CallToolRequest and the like.
Make the XXXRequest types aliases, to preserve the convenience of
generics for the internal machinery (see shared.go, for example.)
I will expand the aliases in a followup PR.
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.
1. Replaced the `uriTemplateToRegexp` function with the use of
[yosida95/uritemplate](https://github.com/yosida95/uritemplate) to
handle URI template matching as per the request.
2. Updated the relevant test cases to verify the new implementation and
fixed an invalid URI template (`"file:///{}/{a}/{b}"`) that doesn't
conform to RFC 6570 due to an empty `{}` expression.
3. Updated `go.mod` and `go.sum` to reflect the new dependency.
Fixes#11.
BREAKING CHANGE
Change the API for adding tools, prompts, resources and resource
templates to a server.
The ServerXXX types are gone along with the plural Add methods
(AddTools, AddPrompts etc.)
Instead there are single Add methods (AddTool, AddPrompt).
In addition, instead of NewServerTool, there is AddTool[In, Out].
Fixes#73.
Provide support for resource templates on the client and server.
Adding, removing and listing resource templates looks just like those
operations on resources.
Although the spec provides no guidance on the unique ID for resource
templates, we follow most existing SDKs, as well as the parallel with
resources, and index on the URI template rather than the name.
As the spec recommends, the server verifies an incoming URI in a
ReadResource request against its list of resources and resource
templates, to make sure the URI came from one of them. The main
technical challenge here is the need to check that a URI template could
have produced a particular URI.
I wrote a very simplified version of this check. At some point
we should switch to github.com/yosida95/uritemplate/v3.
Change-Id: I1e34dd01c8f2171123c68c045ad62f5e85c05e7c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/680158
Auto-Submit: Jonathan Amsterdam <jba@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Add Wrapf, a function that helps with error wrapping.
Change-Id: I102695f75e4d217e09f828f4723cbfcbbe83f887
Reviewed-on: https://go-review.googlesource.com/c/tools/+/679177
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Provide secure reading of files on the local filesystem.
There are subtleties in path manipulation on Windows that I don't fully
understand, so I defer that work for now.
Change-Id: Ic11f4617dde4ac0b31ccd5b0a772bb2f56db026f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/673196
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
