org.mule.transport.http.transformers.HttpRequestBodyToParamMap.java Source code

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Here is the source code for org.mule.transport.http.transformers.HttpRequestBodyToParamMap.java

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/*
 * $Id$
 * --------------------------------------------------------------------------------------
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 *
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */

package org.mule.transport.http.transformers;

import org.mule.api.MuleMessage;
import org.mule.api.transformer.TransformerException;
import org.mule.transformer.AbstractMessageTransformer;
import org.mule.transformer.types.DataTypeFactory;
import org.mule.transport.http.HttpConstants;
import org.mule.util.StringUtils;

import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.codec.net.URLCodec;

public class HttpRequestBodyToParamMap extends AbstractMessageTransformer {
    public HttpRequestBodyToParamMap() {
        registerSourceType(DataTypeFactory.OBJECT);
        setReturnDataType(DataTypeFactory.OBJECT);
    }

    @Override
    public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException {
        Map<String, Object> paramMap = new HashMap<String, Object>();

        try {
            String httpMethod = message.getInboundProperty("http.method");
            String contentType = message.getInboundProperty("Content-Type");

            boolean isGet = HttpConstants.METHOD_GET.equalsIgnoreCase(httpMethod);
            boolean isPost = HttpConstants.METHOD_POST.equalsIgnoreCase(httpMethod);
            boolean isUrlEncoded = false;
            if (contentType != null) {
                isUrlEncoded = contentType.startsWith("application/x-www-form-urlencoded");
            }

            if (!(isGet || (isPost && isUrlEncoded))) {
                throw new Exception("The HTTP method or content type is unsupported!");
            }

            String queryString = null;
            if (isGet) {
                URI uri = new URI(message.getPayloadAsString(outputEncoding));
                queryString = uri.getRawQuery();
            } else if (isPost) {
                queryString = new String(message.getPayloadAsBytes());
            }

            if (StringUtils.isNotBlank(queryString)) {
                addQueryStringToParameterMap(queryString, paramMap, outputEncoding);
            }
        } catch (Exception e) {
            throw new TransformerException(this, e);
        }

        return paramMap;
    }

    protected void addQueryStringToParameterMap(String queryString, Map<String, Object> paramMap,
            String outputEncoding) throws Exception {
        String[] pairs = queryString.split("&");
        for (String pair : pairs) {
            String[] nameValue = pair.split("=");
            if (nameValue.length == 2) {
                URLCodec codec = new URLCodec(outputEncoding);
                String key = codec.decode(nameValue[0]);
                String value = codec.decode(nameValue[1]);
                addToParameterMap(paramMap, key, value);
            }
        }
    }

    @SuppressWarnings("unchecked")
    protected void addToParameterMap(Map<String, Object> paramMap, String key, String value) {
        Object existingValue = paramMap.get(key);
        if (existingValue != null) {
            List<Object> values;
            if (existingValue instanceof List<?>) {
                values = (List<Object>) existingValue;
            } else {
                values = new ArrayList<Object>();
                values.add(existingValue);
            }

            values.add(value);
            paramMap.put(key, values);
        } else {
            paramMap.put(key, value);
        }
    }

    @Override
    public boolean isAcceptNull() {
        return false;
    }
}