com.nesscomputing.httpclient.response.StringContentConverter.java Source code

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Here is the source code for com.nesscomputing.httpclient.response.StringContentConverter.java

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/**
 * Copyright (C) 2012 Ness Computing, Inc.
 *
 * 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 com.nesscomputing.httpclient.response;

import com.nesscomputing.httpclient.HttpClientResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;

import javax.annotation.concurrent.Immutable;

import com.google.common.base.Objects;
import com.google.common.io.CharStreams;
import com.google.common.io.Closeables;

/**
 * A basic implementation of ContentConverter when you only want a string back.
 */
@Immutable
public class StringContentConverter extends AbstractErrorHandlingContentConverter<String> {
    public static final ContentConverter<String> DEFAULT_CONVERTER = new StringContentConverter();
    public static final ContentConverter<String> DEFAULT_404OK_CONVERTER = new StringContentConverter(true);

    public static final ContentResponseHandler<String> DEFAULT_RESPONSE_HANDLER = ContentResponseHandler
            .forConverter(DEFAULT_CONVERTER);
    public static final ContentResponseHandler<String> DEFAULT_404OK_RESPONSE_HANDLER = ContentResponseHandler
            .forConverter(DEFAULT_404OK_CONVERTER);

    private final boolean ignore404;

    protected StringContentConverter() {
        this(false);
    }

    protected StringContentConverter(final boolean ignore404) {
        this.ignore404 = ignore404;
    }

    @Override
    public String convert(HttpClientResponse httpClientResponse, InputStream inputStream) throws IOException {
        final int responseCode = httpClientResponse.getStatusCode();
        switch (responseCode) {
        case 200:
        case 201:
            final Charset charset = Charset.forName(Objects.firstNonNull(httpClientResponse.getCharset(), "UTF-8"));
            final InputStreamReader reader = new InputStreamReader(inputStream, charset);

            try {
                return CharStreams.toString(reader);
            } finally {
                Closeables.closeQuietly(reader);
            }

        case 204:
            return "";

        case 404:
            if (ignore404) {
                return "";
            }
            throw throwHttpResponseException(httpClientResponse);

        default:
            throw throwHttpResponseException(httpClientResponse);
        }
    }
}