com.qwazr.utils.http.HttpResponseEntityException.java Source code

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Here is the source code for com.qwazr.utils.http.HttpResponseEntityException.java

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/**
 * Copyright 2014-2016 Emmanuel Keller / QWAZR
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 com.qwazr.utils.http;

import org.apache.commons.io.IOUtils;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpResponseException;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import java.io.IOException;

public class HttpResponseEntityException extends HttpResponseException {

    private static final long serialVersionUID = 1958648159987063347L;

    private final String contentType;
    private final String contentMessage;

    public HttpResponseEntityException(HttpResponse response, String message) {
        super(getStatusCode(response.getStatusLine()), message);
        HttpEntity entity = response.getEntity();
        String cm = null;
        String ct = null;
        if (entity != null) {
            try {
                cm = IOUtils.toString(entity.getContent());
                Header header = entity.getContentType();
                if (header != null)
                    ct = header.getValue();
            } catch (IllegalStateException | IOException e) {
            }
        }
        contentMessage = cm == null ? message : cm;
        contentType = ct == null ? MediaType.TEXT_PLAIN : ct;
    }

    private static int getStatusCode(StatusLine statusLine) {
        if (statusLine == null)
            return 0;
        return statusLine.getStatusCode();
    }

    public WebApplicationException getWebApplicationException() {
        int code = getStatusCode();
        if (code == 0)
            return new WebApplicationException(this);
        ResponseBuilder response = Response.status(code);
        if (contentMessage == null)
            return new WebApplicationException(this, response.build());
        response.type(contentType).entity(contentMessage);
        return new WebApplicationException(contentMessage, this, response.build());

    }

    public static HttpResponseEntityException findFirstCause(Throwable e) {
        if (e == null)
            return null;
        if (e instanceof HttpResponseEntityException)
            return (HttpResponseEntityException) e;
        return findFirstCause(e.getCause());
    }

}