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• HttpResponse.java

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com.amazonaws.http.HttpResponse Maven / Gradle / Ivy

/*
 * Copyright 2010-2024 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazonaws.http;

import com.amazonaws.Request;
import com.amazonaws.util.CRC32ChecksumCalculatingInputStream;

import java.util.ArrayList;
import java.util.List;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.protocol.HttpContext;

import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.TreeMap;

/**
 * Represents an HTTP response returned by an AWS service in response to a
 * service request.
 */
public class HttpResponse {

    private final Request request;
    private final HttpRequestBase httpRequest;

    private String statusText;
    private int statusCode;
    private InputStream content;
    private Map headers = new TreeMap(String.CASE_INSENSITIVE_ORDER);
    private Map> allHeaders = new TreeMap>(String.CASE_INSENSITIVE_ORDER);
    private HttpContext context;

    /**
     * Constructs a new HttpResponse associated with the specified request.
     *
     * @param request
     *            The associated request that generated this response.
     * @param httpRequest
     *            The underlying http request that generated this response.
     * @throws IOException
     */
    public HttpResponse(Request request, HttpRequestBase httpRequest) {
        this(request, httpRequest, null);
    }

    public HttpResponse(Request request, HttpRequestBase httpRequest, HttpContext context) {
        this.request = request;
        this.httpRequest = httpRequest;
        this.context = context;
    }

    /**
     * Returns the original request associated with this response.
     *
     * @return The original request associated with this response.
     */
    public Request getRequest() {
        return request;
    }

    /**
     * Returns the original http request associated with this response.
     *
     * @return The original http request associated with this response.
     */
    public HttpRequestBase getHttpRequest() {
        return httpRequest;
    }

    /**
     * Returns the HTTP headers returned with this response.
     *
     * @deprecated See {@link #getAllHeaders()}
     * @return The set of HTTP headers returned with this HTTP response.
     */
    public Map getHeaders() {
        return headers;
    }

    /**
     * Returns all of the HTTP headers returned with this response. Unlike
     * {@link #getHeaders()}, this returns all values returned with the
     * same field-name, rather than the last seen value.
     *
     * @return All the headers for a response.
     */
    public Map> getAllHeaders() {
        return allHeaders;
    }

    /**
     * Returns all the values for a given header name.
     *
     * @param header The header name.
     * @return The values for the given header.
     */
    public List getHeaderValues(String header) {
        return allHeaders.get(header);
    }

    /**
     * Looks up a header by name and returns its value. Does case insensitive comparison.
     *
     * @param headerName Name of header to get value for.
     * @return The header value of the given header. Null if header is not present.
     * @deprecated See {@link #getHeaderValues(String)}
     */
    public String getHeader(String headerName) {
        return headers.get(headerName);
    }

    /**
     * Adds an HTTP header to the set associated with this response.
     *
     * @param name
     *            The name of the HTTP header.
     * @param value
     *            The value of the HTTP header.
     */
    public void addHeader(String name, String value) {
        headers.put(name, value);

        List values = allHeaders.get(name);

        if (values == null) {
            values = new ArrayList();
            allHeaders.put(name, values);
        }

        values.add(value);
    }

    /**
     * Sets the input stream containing the response content.
     *
     * @param content
     *            The input stream containing the response content.
     */
    public void setContent(InputStream content) {
        this.content = content;
    }

    /**
     * Returns the input stream containing the response content.
     *
     * @return The input stream containing the response content.
     */
    public InputStream getContent() {
        return content;
    }

    /**
     * Sets the HTTP status text returned with this response.
     *
     * @param statusText
     *            The HTTP status text (ex: "Not found") returned with this
     *            response.
     */
    public void setStatusText(String statusText) {
        this.statusText = statusText;
    }

    /**
     * Returns the HTTP status text associated with this response.
     *
     * @return The HTTP status text associated with this response.
     */
    public String getStatusText() {
        return statusText;
    }

    /**
     * Sets the HTTP status code that was returned with this response.
     *
     * @param statusCode
     *            The HTTP status code (ex: 200, 404, etc) associated with this
     *            response.
     */
    public void setStatusCode(int statusCode) {
        this.statusCode = statusCode;
    }

    /**
     * Returns the HTTP status code (ex: 200, 404, etc) associated with this
     * response.
     *
     * @return The HTTP status code associated with this response.
     */
    public int getStatusCode() {
        return statusCode;
    }

    /**
     * Returns the CRC32 checksum calculated by the underlying CRC32ChecksumCalculatingInputStream.
     *
     * @return The CRC32 checksum.
     */
    public long getCRC32Checksum() {
        if (context == null) {
            return 0L;
        }
        CRC32ChecksumCalculatingInputStream crc32ChecksumInputStream =
                (CRC32ChecksumCalculatingInputStream)context.getAttribute(CRC32ChecksumCalculatingInputStream.class.getName());
        return crc32ChecksumInputStream == null ? 0L : crc32ChecksumInputStream.getCRC32Checksum();
    }

}