/
errors.go
52 lines (45 loc) · 1.54 KB
/
errors.go
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// Copyright 2018 The LUCI Authors.
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ui
import (
"unicode"
"unicode/utf8"
"google.golang.org/grpc/status"
"go.chromium.org/luci/grpc/grpcutil"
"go.chromium.org/luci/server/router"
"go.chromium.org/luci/server/templates"
)
// renderErr is a handler wrapper converts gRPC errors into HTML pages.
func renderErr(h func(*router.Context) error) router.Handler {
return func(ctx *router.Context) {
err := h(ctx)
if err == nil {
return
}
s, _ := status.FromError(err)
message := s.Message()
if message != "" {
// Convert the first rune to upper case.
r, n := utf8.DecodeRuneInString(message)
message = string(unicode.ToUpper(r)) + message[n:]
} else {
message = "Unspecified error" // this should not really happen
}
ctx.Writer.Header().Set("Content-Type", "text/html; charset=utf-8")
ctx.Writer.WriteHeader(grpcutil.CodeStatus(s.Code()))
templates.MustRender(ctx.Context, ctx.Writer, "pages/error.html", map[string]interface{}{
"Message": message,
})
}
}