com.github.ljtfreitas.restify.http.client.request.apache.httpclient.ApacheHttpClientRequestFactory.java Source code

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/*******************************************************************************
 *
 * MIT License
 *
 * Copyright (c) 2016 Tiago de Freitas Lima
 *
 * 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 com.github.ljtfreitas.restify.http.client.request.apache.httpclient;

import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Optional;

import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.methods.HttpOptions;
import org.apache.http.client.methods.HttpPatch;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpTrace;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.protocol.HttpContext;

import com.github.ljtfreitas.restify.http.client.charset.Encoding;
import com.github.ljtfreitas.restify.http.client.request.EndpointRequest;
import com.github.ljtfreitas.restify.http.client.request.HttpClientRequestFactory;

public class ApacheHttpClientRequestFactory implements HttpClientRequestFactory {

    private final HttpClient httpClient;
    private final RequestConfig requestConfig;
    private final HttpContext httpContext;
    private final Charset charset;

    public ApacheHttpClientRequestFactory() {
        this(HttpClients.createSystem(), null);
    }

    public ApacheHttpClientRequestFactory(HttpClient httpClient) {
        this(httpClient, null);
    }

    public ApacheHttpClientRequestFactory(RequestConfig requestConfig) {
        this(HttpClients.createSystem(), requestConfig);
    }

    public ApacheHttpClientRequestFactory(HttpContext httpContext) {
        this(HttpClients.createSystem(), null, httpContext);
    }

    public ApacheHttpClientRequestFactory(Charset charset) {
        this(HttpClients.createSystem(), null, HttpClientContext.create(), charset);
    }

    public ApacheHttpClientRequestFactory(HttpClient httpClient, RequestConfig requestConfig) {
        this(httpClient, requestConfig, HttpClientContext.create());
    }

    public ApacheHttpClientRequestFactory(HttpClient httpClient, RequestConfig requestConfig,
            HttpContext httpContext) {
        this(httpClient, requestConfig, httpContext, Encoding.UTF_8.charset());
    }

    public ApacheHttpClientRequestFactory(HttpClient httpClient, RequestConfig requestConfig,
            HttpContext httpContext, Charset charset) {
        this.httpClient = httpClient;
        this.requestConfig = requestConfig;
        this.httpContext = httpContext;
        this.charset = charset;
    }

    @Override
    public ApacheHttpClientRequest createOf(EndpointRequest endpointRequest) {
        HttpUriRequest httpRequest = HttpUriRequestStrategy.of(endpointRequest.method())
                .create(endpointRequest.endpoint().toString());

        HttpContext context = configure(httpRequest);

        return new ApacheHttpClientRequest(httpClient, httpRequest, context, charset, endpointRequest.headers(),
                endpointRequest);
    }

    private HttpContext configure(HttpUriRequest httpRequest) {
        if (httpContext.getAttribute(HttpClientContext.REQUEST_CONFIG) == null) {
            RequestConfig configuration = Optional.ofNullable(requestConfig)
                    .orElseGet(() -> buildNewConfiguration());

            httpContext.setAttribute(HttpClientContext.REQUEST_CONFIG, configuration);
        }

        return httpContext;
    }

    private RequestConfig buildNewConfiguration() {
        return RequestConfig.custom().setAuthenticationEnabled(true).build();
    }

    private enum HttpUriRequestStrategy {

        GET {
            HttpUriRequest create(String endpoint) {
                return new HttpGet(endpoint);
            }
        },
        HEAD {
            HttpUriRequest create(String endpoint) {
                return new HttpHead(endpoint);
            }
        },
        POST {
            HttpUriRequest create(String endpoint) {
                return new HttpPost(endpoint);
            }
        },
        PUT {
            HttpUriRequest create(String endpoint) {
                return new HttpPut(endpoint);
            }
        },
        PATCH {
            HttpUriRequest create(String endpoint) {
                return new HttpPatch(endpoint);
            }
        },
        DELETE {
            HttpUriRequest create(String endpoint) {
                return new HttpDelete(endpoint);
            }
        },
        OPTIONS {
            HttpUriRequest create(String endpoint) {
                return new HttpOptions(endpoint);
            }
        },
        TRACE {
            HttpUriRequest create(String endpoint) {
                return new HttpTrace(endpoint);
            }
        };

        abstract HttpUriRequest create(String endpoint);

        static HttpUriRequestStrategy of(String method) {
            return Arrays.stream(HttpUriRequestStrategy.values()).filter(m -> m.name().equals(method)).findFirst()
                    .orElseThrow(() -> new IllegalArgumentException("Unsupported http method: " + method));
        }
    }
}