| /* |
| * 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 org.apache.apisix.plugin.runner; |
| |
| import com.google.flatbuffers.FlatBufferBuilder; |
| import io.github.api7.A6.HTTPReqCall.Resp; |
| import io.github.api7.A6.HTTPReqCall.Rewrite; |
| import io.github.api7.A6.HTTPReqCall.Stop; |
| import io.github.api7.A6.TextEntry; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.util.CollectionUtils; |
| import org.springframework.util.StringUtils; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.charset.StandardCharsets; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| /** |
| * table Resp { |
| * id:uint32; |
| * action:Action; |
| * } |
| */ |
| public class HttpResponse implements A6Response { |
| private final Logger logger = LoggerFactory.getLogger(HttpResponse.class); |
| |
| private final long requestId; |
| |
| private ActionType actionType; |
| |
| private Map<String, String> reqHeaders; |
| |
| private Map<String, String> respHeaders; |
| |
| private Map<String, String> args; |
| |
| private String path; |
| |
| private String body; |
| |
| private Integer statusCode; |
| |
| private A6ErrResponse errResponse; |
| |
| public HttpResponse(long requestId) { |
| this.requestId = requestId; |
| } |
| |
| public long getRequestId() { |
| return requestId; |
| } |
| |
| public void setReqHeader(String headerKey, String headerValue) { |
| actionType = ActionType.Rewrite; |
| if (Objects.isNull(reqHeaders)) { |
| reqHeaders = new HashMap<>(); |
| } |
| reqHeaders.put(headerKey, headerValue); |
| } |
| |
| /** |
| * Sets arg. |
| * |
| * @param argKey the arg key |
| * @param argValue the arg value |
| */ |
| public void setArg(String argKey, String argValue) { |
| actionType = ActionType.Rewrite; |
| if (Objects.isNull(args)) { |
| args = new HashMap<>(); |
| } |
| args.put(argKey, argValue); |
| } |
| |
| /** |
| * Sets path. |
| * |
| * @param path the path |
| */ |
| public void setPath(String path) { |
| actionType = ActionType.Rewrite; |
| this.path = path; |
| } |
| |
| /** |
| * Sets header. |
| * |
| * @param headerKey the header key |
| * @param headerValue the header value |
| */ |
| public void setHeader(String headerKey, String headerValue) { |
| actionType = ActionType.Stop; |
| if (Objects.isNull(respHeaders)) { |
| respHeaders = new HashMap<>(); |
| } |
| respHeaders.put(headerKey, headerValue); |
| } |
| |
| /** |
| * Sets body. |
| * |
| * @param body the body(string) |
| */ |
| public void setBody(String body) { |
| actionType = ActionType.Stop; |
| this.body = body; |
| } |
| |
| /** |
| * Sets status code. |
| * |
| * @param statusCode the status code |
| */ |
| public void setStatusCode(int statusCode) { |
| actionType = ActionType.Stop; |
| this.statusCode = statusCode; |
| } |
| |
| public void setErrResponse(A6ErrResponse errResponse) { |
| this.errResponse = errResponse; |
| } |
| |
| @Override |
| public A6ErrResponse getErrResponse() { |
| return this.errResponse; |
| } |
| |
| @Override |
| public ByteBuffer encode() { |
| if (!Objects.isNull(errResponse)) { |
| return errResponse.encode(); |
| } |
| |
| FlatBufferBuilder builder = new FlatBufferBuilder(); |
| |
| if (Objects.isNull(actionType)) { |
| actionType = A6Response.ActionType.NONE; |
| } |
| |
| int action = 0; |
| |
| if (actionType == A6Response.ActionType.Rewrite) { |
| action = buildRewriteResp(builder); |
| } else if (actionType == A6Response.ActionType.Stop) { |
| action = buildStopResp(builder); |
| } |
| |
| Resp.startResp(builder); |
| Resp.addAction(builder, action); |
| Resp.addActionType(builder, actionType.getType()); |
| Resp.addId(builder, getRequestId()); |
| builder.finish(Resp.endResp(builder)); |
| return builder.dataBuffer(); |
| } |
| |
| private int buildStopResp(FlatBufferBuilder builder) { |
| int headerIndex = -1; |
| if (!CollectionUtils.isEmpty(respHeaders)) { |
| int[] headerTexts = new int[respHeaders.size()]; |
| int i = -1; |
| for (Map.Entry<String, String> header : respHeaders.entrySet()) { |
| int key = builder.createString(header.getKey()); |
| int value = 0; |
| if (!Objects.isNull(header.getValue())) { |
| value = builder.createString(header.getValue()); |
| } |
| int text = TextEntry.createTextEntry(builder, key, value); |
| headerTexts[++i] = text; |
| } |
| headerIndex = Stop.createHeadersVector(builder, headerTexts); |
| } |
| |
| int bodyIndex = -1; |
| if (StringUtils.hasText(body)) { |
| byte[] bodyBytes = body.getBytes(StandardCharsets.UTF_8); |
| bodyIndex = Stop.createBodyVector(builder, bodyBytes); |
| } |
| |
| Stop.startStop(builder); |
| if (!Objects.isNull(statusCode)) { |
| Stop.addStatus(builder, statusCode); |
| } else { |
| /** |
| * Avoid APISIX using 0 as the default HTTP Status Code |
| * {@link org.apache.apisix.plugin.runner.HttpResponse#setStatusCode(int statusCode)} |
| * @see https://github.com/apache/apisix-java-plugin-runner/issues/55 |
| */ |
| Stop.addStatus(builder, 200); |
| logger.info("Use 200 as the default HTTP Status Code when setStatusCode is not called"); |
| } |
| if (-1 != headerIndex) { |
| Stop.addHeaders(builder, headerIndex); |
| } |
| if (-1 != bodyIndex) { |
| Stop.addBody(builder, bodyIndex); |
| } |
| return Stop.endStop(builder); |
| } |
| |
| private int buildRewriteResp(FlatBufferBuilder builder) { |
| int pathIndex = -1; |
| if (!Objects.isNull(path)) { |
| pathIndex = builder.createString(path); |
| } |
| |
| int headerIndex = -1; |
| if (!CollectionUtils.isEmpty(reqHeaders)) { |
| int[] headerTexts = new int[reqHeaders.size()]; |
| int i = -1; |
| for (Map.Entry<String, String> header : reqHeaders.entrySet()) { |
| int key = builder.createString(header.getKey()); |
| int value = 0; |
| if (!Objects.isNull(header.getValue())) { |
| value = builder.createString(header.getValue()); |
| } |
| int text = TextEntry.createTextEntry(builder, key, value); |
| headerTexts[++i] = text; |
| } |
| headerIndex = Rewrite.createHeadersVector(builder, headerTexts); |
| } |
| |
| int argsIndex = -1; |
| if (!CollectionUtils.isEmpty(args)) { |
| int[] argTexts = new int[args.size()]; |
| int i = -1; |
| for (Map.Entry<String, String> arg : args.entrySet()) { |
| int key = builder.createString(arg.getKey()); |
| int value = 0; |
| if (!Objects.isNull(arg.getValue())) { |
| value = builder.createString(arg.getValue()); |
| } |
| int text = TextEntry.createTextEntry(builder, key, value); |
| argTexts[++i] = text; |
| } |
| argsIndex = Rewrite.createArgsVector(builder, argTexts); |
| } |
| Rewrite.startRewrite(builder); |
| if (-1 != pathIndex) { |
| Rewrite.addPath(builder, pathIndex); |
| } |
| if (-1 != headerIndex) { |
| Rewrite.addHeaders(builder, headerIndex); |
| } |
| if (-1 != argsIndex) { |
| Rewrite.addArgs(builder, argsIndex); |
| } |
| return Rewrite.endRewrite(builder); |
| } |
| |
| @Override |
| public byte getType() { |
| return 2; |
| } |
| } |