| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 config |
| |
| import ( |
| "strings" |
| ) |
| |
| import ( |
| log "github.com/dubbogo/gost/log/logger" |
| |
| "github.com/knadh/koanf" |
| "github.com/knadh/koanf/parsers/json" |
| "github.com/knadh/koanf/parsers/toml" |
| "github.com/knadh/koanf/parsers/yaml" |
| "github.com/knadh/koanf/providers/confmap" |
| "github.com/knadh/koanf/providers/rawbytes" |
| |
| "github.com/pkg/errors" |
| ) |
| |
| import ( |
| "dubbo.apache.org/dubbo-go/v3/common/constant/file" |
| "dubbo.apache.org/dubbo-go/v3/config/parsers/properties" |
| ) |
| |
| // GetConfigResolver get config resolver |
| func GetConfigResolver(conf *loaderConf) *koanf.Koanf { |
| var ( |
| k *koanf.Koanf |
| err error |
| ) |
| if len(conf.suffix) <= 0 { |
| conf.suffix = string(file.YAML) |
| } |
| if len(conf.delim) <= 0 { |
| conf.delim = "." |
| } |
| bytes := conf.bytes |
| if len(bytes) <= 0 { |
| panic(errors.New("bytes is nil,please set bytes or file path")) |
| } |
| k = koanf.New(conf.delim) |
| |
| switch conf.suffix { |
| case "yaml", "yml": |
| err = k.Load(rawbytes.Provider(bytes), yaml.Parser()) |
| case "json": |
| err = k.Load(rawbytes.Provider(bytes), json.Parser()) |
| case "toml": |
| err = k.Load(rawbytes.Provider(bytes), toml.Parser()) |
| case "properties": |
| err = k.Load(rawbytes.Provider(bytes), properties.Parser()) |
| default: |
| err = errors.Errorf("no support %s file suffix", conf.suffix) |
| } |
| |
| if err != nil { |
| panic(err) |
| } |
| return resolvePlaceholder(k) |
| } |
| |
| // resolvePlaceholder replace ${xx} with real value |
| func resolvePlaceholder(resolver *koanf.Koanf) *koanf.Koanf { |
| m := make(map[string]interface{}) |
| for k, v := range resolver.All() { |
| s, ok := v.(string) |
| if !ok { |
| continue |
| } |
| newKey, defaultValue := checkPlaceholder(s) |
| if newKey == "" { |
| continue |
| } |
| m[k] = resolver.Get(newKey) |
| if m[k] == nil { |
| m[k] = defaultValue |
| } |
| } |
| err := resolver.Load(confmap.Provider(m, resolver.Delim()), nil) |
| if err != nil { |
| log.Errorf("resolvePlaceholder error %s", err) |
| } |
| return resolver |
| } |
| |
| func checkPlaceholder(s string) (newKey, defaultValue string) { |
| s = strings.TrimSpace(s) |
| if !strings.HasPrefix(s, file.PlaceholderPrefix) || !strings.HasSuffix(s, file.PlaceholderSuffix) { |
| return |
| } |
| s = s[len(file.PlaceholderPrefix) : len(s)-len(file.PlaceholderSuffix)] |
| indexColon := strings.Index(s, ":") |
| if indexColon == -1 { |
| newKey = strings.TrimSpace(s) |
| return |
| } |
| newKey = strings.TrimSpace(s[0:indexColon]) |
| defaultValue = strings.TrimSpace(s[indexColon+1:]) |
| |
| return |
| } |