http_*: add log for http api and refine the err handle logic (#2997)

cdc/capture/http_errors.go

@@ -0,0 +1,51 @@
+// Copyright 2021 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package capture
+
+import (
+	"strings"
+
+	"github.com/pingcap/errors"
+	cerror "github.com/pingcap/tiflow/pkg/errors"
+)
+
+// httpBadRequestError is some errors that will cause a BadRequestError in http handler
+var httpBadRequestError = []*errors.Error{
+	cerror.ErrAPIInvalidParam, cerror.ErrSinkURIInvalid, cerror.ErrStartTsBeforeGC,
+	cerror.ErrChangeFeedNotExists, cerror.ErrTargetTsBeforeStartTs, cerror.ErrTableIneligible,
+	cerror.ErrFilterRuleInvalid, cerror.ErrChangefeedUpdateRefused, cerror.ErrMySQLConnectionError,
+	cerror.ErrMySQLInvalidConfig,
+}
+
+// IsHTTPBadRequestError check if a error is a http bad request error
+func IsHTTPBadRequestError(err error) bool {
+	if err == nil {
+		return false
+	}
+	for _, e := range httpBadRequestError {
+		if e.Equal(err) {
+			return true
+		}
+
+		rfcCode, ok := cerror.RFCCode(err)
+		if ok && e.RFCCode() == rfcCode {
+			return true
+		}
+
+		if strings.Contains(err.Error(), string(e.RFCCode())) {
+			return true
+		}
+	}
+	return false
+}

cdc/capture/http_errors_test.go

@@ -0,0 +1,33 @@
+// Copyright 2021 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package capture
+
+import (
+	"testing"
+
+	"github.com/pingcap/errors"
+	cerror "github.com/pingcap/tiflow/pkg/errors"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIsHTTPBadRequestError(t *testing.T) {
+	err := cerror.ErrAPIInvalidParam.GenWithStack("aa")
+	require.Equal(t, true, IsHTTPBadRequestError(err))
+	err = cerror.ErrAPIInvalidParam.Wrap(errors.New("aa"))
+	require.Equal(t, true, IsHTTPBadRequestError(err))
+	err = cerror.ErrPDEtcdAPIError.GenWithStack("aa")
+	require.Equal(t, false, IsHTTPBadRequestError(err))
+	err = nil
+	require.Equal(t, false, IsHTTPBadRequestError(err))
+}