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feat: use json_path to analyze body param (#27)
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89 changes: 89 additions & 0 deletions
89
...is-adapter-dubbo/src/main/java/com/tencent/polaris/common/parser/JsonPathQueryParser.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /* | ||
| * Tencent is pleased to support the open source community by making Polaris available. | ||
| * | ||
| * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved. | ||
| * | ||
| * Licensed under the BSD 3-Clause License (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://opensource.org/licenses/BSD-3-Clause | ||
| * | ||
| * 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. | ||
| */ | ||
|
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| package com.tencent.polaris.common.parser; | ||
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| import com.jayway.jsonpath.JsonPath; | ||
| import com.jayway.jsonpath.ReadContext; | ||
| import shade.polaris.com.google.gson.Gson; | ||
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| import java.util.Objects; | ||
| import java.util.Optional; | ||
| import java.util.regex.Pattern; | ||
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| class JsonPathQueryParser implements QueryParser { | ||
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| private static final Pattern ARRAY_PATTERN = Pattern.compile("^.+\\[[0-9]+\\]"); | ||
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| private static final String PREFIX_PARAM = "param"; | ||
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| private static final String PREFIX_PARAM_ARRAY = "param["; | ||
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| @Override | ||
| public String name() { | ||
| return "JsonPath"; | ||
| } | ||
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| @Override | ||
| public Optional<String> parse(String query, Object[] parameters) { | ||
| if (Objects.isNull(parameters) || parameters.length == 0) { | ||
| return Optional.empty(); | ||
| } | ||
| Index index = resolveIndex(query); | ||
| if (index.index == -1 || index.index > parameters.length) { | ||
| return Optional.empty(); | ||
| } | ||
| String str = new Gson().toJson(parameters[index.index]); | ||
| ReadContext ctx = JsonPath.parse(str); | ||
| Object value = ctx.read(index.key, Object.class); | ||
| if (Objects.isNull(value)) { | ||
| return Optional.empty(); | ||
| } | ||
| return Optional.of(Objects.toString(value)); | ||
| } | ||
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| private Index resolveIndex(String key) { | ||
| if (key.startsWith(PREFIX_PARAM_ARRAY)) { | ||
| int endIndex = key.indexOf("]"); | ||
| String indexStr = key.substring(PREFIX_PARAM_ARRAY.length(), endIndex); | ||
| int index = Integer.parseInt(indexStr); | ||
| int startIndex = endIndex + 2; | ||
| if (!Objects.equals(key.charAt(endIndex+1), '.')) { | ||
| startIndex = endIndex + 1; | ||
| } | ||
| return new Index(index, key.substring(startIndex)); | ||
| } | ||
| if (key.startsWith(PREFIX_PARAM)) { | ||
| return new Index(0, key.replace(PREFIX_PARAM + ".", "")); | ||
| } | ||
| return EMPTY_INDEX; | ||
| } | ||
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| private static final Index EMPTY_INDEX = new Index(-1, ""); | ||
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| private static final class Index { | ||
| private final int index; | ||
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| private final String key; | ||
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| public Index(int index, String key) { | ||
| this.index = index; | ||
| this.key = key; | ||
| } | ||
| } | ||
| } |
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