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Add bearer-token authentication to /mcp endpoint #3
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,44 +1,130 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "net/http" | ||
| "net/http/httptest" | ||
| "testing" | ||
|
|
||
| "github.com/modelcontextprotocol/go-sdk/mcp" | ||
|
|
||
| "degoog-mcp/internal/config" | ||
| "degoog-mcp/internal/logger" | ||
| ) | ||
|
|
||
| func TestBuildMuxRoutes(t *testing.T) { | ||
| srv := mcp.NewServer(&mcp.Implementation{Name: SERVER_NAME, Version: SERVER_VERSION}, nil) | ||
| mux := buildMux(srv, logger.Get()) | ||
| func newServer() *mcp.Server { | ||
| return mcp.NewServer(&mcp.Implementation{Name: SERVER_NAME, Version: SERVER_VERSION}, nil) | ||
| } | ||
|
|
||
| func TestHealthOpen(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{}, logger.Get()) | ||
|
|
||
| health := httptest.NewRecorder() | ||
| mux.ServeHTTP(health, httptest.NewRequest(http.MethodGet, ROUTE_HEALTH, nil)) | ||
| if health.Code != http.StatusOK { | ||
| t.Fatalf("health status: want 200, got %d", health.Code) | ||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, httptest.NewRequestWithContext(context.Background(), http.MethodGet, ROUTE_HEALTH, nil)) | ||
| if rec.Code != http.StatusOK { | ||
| t.Fatalf("health status: want 200, got %d", rec.Code) | ||
| } | ||
| if health.Body.String() != HEALTH_BODY { | ||
| t.Fatalf("health body: want %q, got %q", HEALTH_BODY, health.Body.String()) | ||
| if rec.Body.String() != HEALTH_BODY { | ||
| t.Fatalf("health body: want %q, got %q", HEALTH_BODY, rec.Body.String()) | ||
| } | ||
| } | ||
|
|
||
| cases := []struct { | ||
| name string | ||
| path string | ||
| want string | ||
| }{ | ||
| {name: "modern", path: ROUTE_MCP, want: ROUTE_MCP}, | ||
| {name: "sse", path: ROUTE_SSE, want: ROUTE_SSE}, | ||
| {name: "legacy", path: ROUTE_LEGACY, want: ROUTE_LEGACY}, | ||
| func TestHealthOpenWithToken(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{AuthToken: "s3cret"}, logger.Get()) | ||
|
|
||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, ROUTE_HEALTH, nil)) | ||
| if rec.Code != http.StatusOK { | ||
| t.Fatalf("health should stay open with token set: got %d", rec.Code) | ||
| } | ||
| } | ||
|
|
||
| func TestMcpReachableNoToken(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{}, logger.Get()) | ||
|
|
||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, ROUTE_MCP, nil)) | ||
| if rec.Code == http.StatusUnauthorized { | ||
| t.Fatalf("no token configured should not auth-block /mcp, got 401") | ||
| } | ||
| } | ||
|
|
||
| func TestMcpMissingAuth(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{AuthToken: "s3cret"}, logger.Get()) | ||
|
|
||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, httptest.NewRequest(http.MethodPost, ROUTE_MCP, nil)) | ||
| if rec.Code != http.StatusUnauthorized { | ||
| t.Fatalf("missing auth: want 401, got %d", rec.Code) | ||
| } | ||
| assertWWWAuthenticate(t, rec) | ||
| } | ||
|
|
||
| func TestMcpMalformedAuth(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{AuthToken: "s3cret"}, logger.Get()) | ||
|
|
||
| req := httptest.NewRequest(http.MethodPost, ROUTE_MCP, nil) | ||
| req.Header.Set(HEADER_AUTHZ, "s3cret") | ||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, req) | ||
| if rec.Code != http.StatusUnauthorized { | ||
| t.Fatalf("malformed auth (no bearer prefix): want 401, got %d", rec.Code) | ||
| } | ||
| assertWWWAuthenticate(t, rec) | ||
| } | ||
|
|
||
| func TestMcpWrongToken(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{AuthToken: "s3cret"}, logger.Get()) | ||
|
|
||
| req := httptest.NewRequest(http.MethodPost, ROUTE_MCP, nil) | ||
| req.Header.Set(HEADER_AUTHZ, BEARER_PREFIX+"nope") | ||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, req) | ||
| if rec.Code != http.StatusUnauthorized { | ||
| t.Fatalf("wrong token: want 401, got %d", rec.Code) | ||
| } | ||
| assertWWWAuthenticate(t, rec) | ||
| } | ||
|
|
||
| func TestMcpCorrectToken(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{AuthToken: "s3cret"}, logger.Get()) | ||
|
|
||
| req := httptest.NewRequest(http.MethodGet, ROUTE_MCP, nil) | ||
| req.Header.Set(HEADER_AUTHZ, BEARER_PREFIX+"s3cret") | ||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, req) | ||
| if rec.Code == http.StatusUnauthorized { | ||
| t.Fatalf("correct token should pass through to /mcp handler, got 401") | ||
| } | ||
| } | ||
|
|
||
| func TestMcpCorrectTokenIsCaseAndWhitespaceTolerant(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{AuthToken: "s3cret"}, logger.Get()) | ||
|
|
||
| req := httptest.NewRequest(http.MethodGet, ROUTE_MCP, nil) | ||
| req.Header.Set(HEADER_AUTHZ, "bearer s3cret") | ||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, req) | ||
| if rec.Code == http.StatusUnauthorized { | ||
| t.Fatalf("case-insensitive bearer scheme with extra spaces should pass through to /mcp handler, got 401") | ||
| } | ||
| } | ||
|
|
||
| func assertWWWAuthenticate(t *testing.T, rec *httptest.ResponseRecorder) { | ||
| t.Helper() | ||
| if got := rec.Header().Get(HEADER_WWW_AUTH); got != WWW_AUTH_VALUE { | ||
| t.Fatalf("WWW-Authenticate: want %q, got %q", WWW_AUTH_VALUE, got) | ||
| } | ||
| } | ||
|
|
||
| func TestLegacyRoutesGone(t *testing.T) { | ||
| mux := buildMux(newServer(), &config.Config{}, logger.Get()) | ||
|
|
||
| for _, tt := range cases { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| _, pattern := mux.Handler(httptest.NewRequest(http.MethodGet, tt.path, nil)) | ||
| if pattern != tt.want { | ||
| t.Fatalf("route pattern: want %q, got %q", tt.want, pattern) | ||
| } | ||
| }) | ||
| for _, path := range []string{"/sse", "/"} { | ||
| rec := httptest.NewRecorder() | ||
| mux.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, path, nil)) | ||
| if rec.Code != http.StatusNotFound { | ||
| t.Fatalf("legacy path %q: want 404, got %d", path, rec.Code) | ||
| } | ||
| } | ||
| } | ||
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