io.servicecomb.common.rest.codec.param.BodyProcessorCreator.java Source code

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Here is the source code for io.servicecomb.common.rest.codec.param.BodyProcessorCreator.java

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/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * 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 io.servicecomb.common.rest.codec.param;

import java.io.InputStream;
import java.lang.reflect.Type;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;

import org.apache.commons.io.IOUtils;

import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;

import io.servicecomb.common.rest.RestConst;
import io.servicecomb.common.rest.codec.RestClientRequest;
import io.servicecomb.common.rest.codec.RestObjectMapper;
import io.servicecomb.foundation.vertx.stream.BufferOutputStream;
import io.servicecomb.swagger.generator.core.utils.ClassUtils;
import io.swagger.models.parameters.Parameter;
import io.vertx.core.buffer.Buffer;

public class BodyProcessorCreator implements ParamValueProcessorCreator {

    public static final String PARAMTYPE = "body";

    public static class BodyProcessor implements ParamValueProcessor {
        protected JavaType targetType;

        public BodyProcessor(JavaType targetType) {
            this.targetType = targetType;
        }

        @Override
        public Object getValue(HttpServletRequest request) throws Exception {
            Object body = request.getAttribute(RestConst.BODY_PARAMETER);
            if (body != null) {
                return convertValue(body, targetType);
            }

            // for standard HttpServletRequest, getInputStream will never return null
            // but for mocked HttpServletRequest, maybe get a null
            //  like io.servicecomb.provider.springmvc.reference.ClientToHttpServletRequest
            InputStream inputStream = request.getInputStream();
            if (inputStream == null) {
                return null;
            }

            String contentType = request.getContentType();
            if (contentType != null && !contentType.startsWith(MediaType.APPLICATION_JSON)) {
                // TODO: we should consider body encoding
                return IOUtils.toString(inputStream, "UTF-8");
            }
            return RestObjectMapper.INSTANCE.readValue(inputStream, targetType);
        }

        @Override
        public void setValue(RestClientRequest clientRequest, Object arg) throws Exception {
            try (BufferOutputStream output = new BufferOutputStream()) {
                clientRequest.putHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON);
                RestObjectMapper.INSTANCE.writeValue(output, arg);
                clientRequest.write(output.getBuffer());
            }
        }

        @Override
        public String getParameterPath() {
            return "";
        }

        @Override
        public String getProcessorType() {
            return PARAMTYPE;
        }
    }

    public static class RawJsonBodyProcessor extends BodyProcessor {

        public RawJsonBodyProcessor(JavaType targetType) {
            super(targetType);
        }

        @Override
        public Object getValue(HttpServletRequest request) throws Exception {
            Object body = request.getAttribute(RestConst.BODY_PARAMETER);
            if (body != null) {
                return convertValue(body, targetType);
            }

            InputStream inputStream = request.getInputStream();
            if (inputStream == null) {
                return null;
            }

            // TODO: we should consider body encoding
            return IOUtils.toString(inputStream, "UTF-8");
        }

        @Override
        public void setValue(RestClientRequest clientRequest, Object arg) throws Exception {
            clientRequest.putHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON);
            clientRequest.write(Buffer.buffer((String) arg));
        }
    }

    public BodyProcessorCreator() {
        ParamValueProcessorCreatorManager.INSTANCE.register(PARAMTYPE, this);
    }

    @Override
    public ParamValueProcessor create(Parameter parameter, Type genericParamType) {
        JavaType targetType = TypeFactory.defaultInstance().constructType(genericParamType);
        boolean rawJson = ClassUtils.isRawJsonType(parameter);
        if (genericParamType.getTypeName().equals(String.class.getTypeName()) && rawJson) {
            return new RawJsonBodyProcessor(targetType);
        }

        return new BodyProcessor(targetType);
    }
}