f5703d390b
Apply five style rules: convert iota string enums to typed string constants, replace errors.As with errors.AsType, merge three-group imports into two groups, fix multiline parameter/argument formatting, and replace fmt.Sprintf URL construction with net/url. Signed-off-by: Émile Ré <emile@probo.com>
90 lines
2.8 KiB
Go
90 lines
2.8 KiB
Go
// Copyright (c) 2025-2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package mcputils
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import (
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"context"
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"errors"
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"fmt"
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"runtime/debug"
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"go.gearno.de/kit/log"
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mcpgenmcp "go.probo.inc/mcpgen/mcp"
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"go.probo.inc/probo/pkg/coredata"
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"go.probo.inc/probo/pkg/iam"
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"go.probo.inc/probo/pkg/validator"
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)
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// NewRecoverFunc returns a RecoverFunc for the generated MCP server that
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// classifies panics into safe client-facing errors and logs unknown errors.
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func NewRecoverFunc(logger *log.Logger) mcpgenmcp.RecoverFunc {
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return func(ctx context.Context, r any) error {
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if r == nil {
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logger.ErrorCtx(ctx, "nil panic in MCP tool handler")
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return fmt.Errorf("internal server error")
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}
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if err, ok := r.(error); ok {
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return sanitizeError(ctx, logger, err)
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}
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logger.ErrorCtx(
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ctx,
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"unexpected panic in MCP tool handler",
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log.Any("panic", r),
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log.String("stack", string(debug.Stack())),
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)
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return fmt.Errorf("internal server error")
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}
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}
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// sanitizeError classifies known error types and returns a clear message for
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// those. Unknown errors are logged and replaced with a generic internal error
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// to avoid leaking implementation details to the client.
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func sanitizeError(ctx context.Context, logger *log.Logger, err error) error {
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if _, ok := errors.AsType[*iam.ErrInsufficientPermissions](err); ok {
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return fmt.Errorf("permission denied")
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}
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if _, ok := errors.AsType[*iam.ErrAssumptionRequired](err); ok {
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return fmt.Errorf("assumption required")
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}
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if errors.Is(err, coredata.ErrResourceNotFound) {
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return fmt.Errorf("resource not found")
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}
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if errors.Is(err, coredata.ErrResourceAlreadyExists) {
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return fmt.Errorf("resource already exists")
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}
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if errors.Is(err, coredata.ErrResourceInUse) {
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return fmt.Errorf("resource is in use")
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}
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if validationErrors, ok := errors.AsType[validator.ValidationErrors](err); ok {
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return validationErrors
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}
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if validationError, ok := errors.AsType[*validator.ValidationError](err); ok {
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return validationError
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}
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logger.ErrorCtx(ctx, "internal error in MCP tool handler", log.Error(err))
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return fmt.Errorf("internal server error")
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}
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