io.joshworks.restclient.http.HttpResponse Maven / Gradle / Ivy

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/*
The MIT License

Copyright (c) 2013 Mashape (http://mashape.com)

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package io.joshworks.restclient.http;

import io.joshworks.restclient.Constants;
import io.joshworks.restclient.http.mapper.ObjectMapper;
import io.joshworks.restclient.http.utils.ResponseUtils;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.StatusLine;
import org.apache.http.util.EntityUtils;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.GZIPInputStream;

public class HttpResponse {

    private int statusCode;
    private String statusText;
    private Headers headers = new Headers();
    private InputStream rawBody;
    private T body;
    private Class responseClass;
    private ObjectMapper objectMapper;


    public static  HttpResponse fallback(T body) {
        return new HttpResponse<>(body);
    }

    private HttpResponse(T object) {
        this.body = object;
    }

    public HttpResponse(org.apache.http.HttpResponse response, Class responseClass, ObjectMapper objectMapper) {
        this.responseClass = responseClass;
        this.objectMapper = objectMapper;
        HttpEntity responseEntity = response.getEntity();

        Header[] allHeaders = response.getAllHeaders();
        for (Header header : allHeaders) {
            String headerName = header.getName();
            List list = headers.get(headerName);
            if (list == null)
                list = new ArrayList<>();
            list.add(header.getValue());
            headers.put(headerName, list);
        }
        StatusLine statusLine = response.getStatusLine();
        this.statusCode = statusLine.getStatusCode();
        this.statusText = statusLine.getReasonPhrase();

        if (responseEntity != null) {
            try {
                byte[] rawBody;
                try {
                    InputStream responseInputStream = responseEntity.getContent();
                    if (ResponseUtils.isGzipped(responseEntity.getContentEncoding())) {
                        responseInputStream = new GZIPInputStream(responseEntity.getContent());
                    }
                    rawBody = ResponseUtils.getBytes(responseInputStream);
                } catch (IOException e2) {
                    throw new RuntimeException(e2);
                }
                this.rawBody = new ByteArrayInputStream(rawBody);
            } catch (Exception e) {
                EntityUtils.consumeQuietly(responseEntity);
                throw new RuntimeException(e);
            }
        }

        EntityUtils.consumeQuietly(responseEntity);
    }

    public int getStatus() {
        return statusCode;
    }

    public boolean isSuccessful() {
        return statusCode >= 200 && statusCode < 300 || statusCode == 304;
    }

    public String getStatusText() {
        return statusText;
    }

    /**
     * @return Response Headers (map) with same case as server response.
     * For instance use getHeaders().getFirst("Location") and not getHeaders().getFirst("location") to get first header "Location"
     */
    public Headers getHeaders() {
        return headers;
    }

    public InputStream getRawBody() {
        return rawBody;
    }

    public T getBody() {
        if(this.body == null) {
            this.body = parseBody();
        }
        return body;
    }

    private T parseBody() {

        if (InputStream.class.equals(responseClass)) {
            return (T) this.rawBody;
        }

        String bodyString = readBodyAsString();

        if (JsonNode.class.equals(responseClass)) {
            return (T) new JsonNode(bodyString);
        } else if (String.class.equals(responseClass)) {
            return (T) bodyString;
        }  else if (objectMapper != null) {
            return objectMapper.readValue(bodyString, responseClass);
        } else {
            throw new RuntimeException("Only String, JsonNode and InputStream are supported, or an ObjectMapper implementation is required.");
        }
    }

    private String readBodyAsString()  {
        try {
            if(this.rawBody == null) {
                return null;
            }
            String charset = getCharset();
            StringBuilder sb = new StringBuilder();
            BufferedReader br = new BufferedReader(new InputStreamReader(this.rawBody, charset));
            String line;
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            return sb.toString();
        }catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private String getCharset() {
        String charset = Constants.UTF_8;

        String contentType = headers.getFirst("Content-Type");
        if (contentType != null) {
            String responseCharset = ResponseUtils.getCharsetFromContentType(contentType);
            if (responseCharset != null && !responseCharset.trim().equals("")) {
                charset = responseCharset;
            }
        }
        return charset;
    }
}