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

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Here is the source code for com.qwazr.utils.http.HttpResponseHandler.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.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.entity.ContentType;

import java.io.IOException;

public abstract class HttpResponseHandler<T> implements ResponseHandler<T> {

    private final ContentType expectedContentType;
    private final int[] expectedCodes;
    protected HttpEntity httpEntity;
    protected StatusLine statusLine;

    public HttpResponseHandler(ContentType expectedContentType, int... expectedCodes) {
        this.expectedContentType = expectedContentType;
        this.expectedCodes = expectedCodes;
    }

    @Override
    public T handleResponse(HttpResponse response) throws IOException {
        httpEntity = response.getEntity();
        statusLine = response.getStatusLine();
        if (expectedCodes != null && expectedCodes.length > 0)
            HttpUtils.checkStatusCodes(response, expectedCodes);
        if (expectedContentType != null)
            HttpUtils.checkIsEntity(response, expectedContentType);
        return null;
    }

    public Integer getStatusCode() {
        if (statusLine == null)
            return null;
        return statusLine.getStatusCode();
    }

    public ContentType getContentType() {
        if (httpEntity == null)
            return null;
        return ContentType.get(httpEntity);
    }

}