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• HttpRequestNing.java

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com.threewks.thundr.http.service.ning.HttpRequestNing Maven / Gradle / Ivy

/*
 * This file is a component of thundr, a software library from 3wks.
 * Read more: http://www.3wks.com.au/thundr
 * Copyright (C) 2013 3wks, 
 *
 * 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.threewks.thundr.http.service.ning;

import static com.threewks.thundr.http.HttpSupport.convertToValidUrl;

import java.io.InputStream;
import java.net.HttpCookie;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import jodd.util.Base64;
import jodd.util.StringUtil;

import com.atomicleopard.expressive.Expressive;
import com.ning.http.client.AsyncHttpClient;
import com.ning.http.client.AsyncHttpClient.BoundRequestBuilder;
import com.threewks.thundr.http.ContentType;
import com.threewks.thundr.http.FileParameter;
import com.threewks.thundr.http.HttpSupport;
import com.threewks.thundr.http.HttpSupport.Header;
import com.threewks.thundr.http.service.HttpRequest;
import com.threewks.thundr.http.service.HttpRequestException;
import com.threewks.thundr.http.service.HttpResponse;
import com.threewks.thundr.util.Encoder;

public class HttpRequestNing implements HttpRequest {
	private String encoding = "UTF-8";
	private String url;
	private Object body;
	private Map headers = new HashMap();
	private Map parameters = new LinkedHashMap();
	private List cookies = new ArrayList();
	private boolean followRedirects = true;
	private long timeout = 60000;
	private String username;
	private String password;
	private String scheme;
	@SuppressWarnings("unused")
	private List fileParameters = Collections.emptyList();
	private HttpServiceNing httpService;
	private AsyncHttpClient client;

	public HttpRequestNing(HttpServiceNing httpService, AsyncHttpClient client, String url) {
		this.httpService = httpService;
		this.url = convertToValidUrl(url);
		this.client = client;
	}

	/**
	 * Indicate if the WS should continue when hitting a 301 or 302
	 * 
	 * @return the WebRequest for chaining.
	 */
	@Override
	public HttpRequest followRedirects(boolean value) {
		this.followRedirects = value;
		return this;
	}

	@Override
	public HttpRequest timeout(long millis) {
		this.timeout = millis;
		return this;
	}

	@Override
	public HttpRequest body(Object body) {
		this.body = body;
		return this;
	}

	/**
	 * Sets the content type of the request. For content types not supported in the {@link ContentType} enum,
	 * you can set the content type header directly. 
	 * 
	 * request.header({@link HttpSupport#HttpHeaderContentType}, "content/type");
	 * 
	 * 
	 */
	@Override
	public HttpRequest contentType(ContentType contentType) {
		return contentType(contentType.value());
	}

	@Override
	public HttpRequest contentType(String contentType) {
		header(Header.ContentType, contentType);
		return this;
	}

	@Override
	public HttpRequest headers(Map headers) {
		this.headers = headers;
		return this;
	}

	@Override
	public HttpRequest header(String name, String value) {
		this.headers.put(name, value);
		return this;
	}

	@Override
	public HttpRequest cookie(HttpCookie cookie) {
		this.cookies.add(cookie);
		return this;
	}

	@Override
	public HttpRequest cookies(Collection cookie) {
		this.cookies.addAll(cookie);
		return this;
	}

	@Override
	public HttpRequest parameter(String name, String value) {
		this.parameters.put(name, value);
		return this;
	}

	@Override
	public HttpRequest parameter(String name, Object value) {
		this.parameters.put(name, value);
		return this;
	}

	/**
	 * Adds the given parameters to request.
	 * GET: parameters are passed as a query string
	 * POST: parameters are passed in the body
	 * PUT: parameters are passed in the body
	 * DELETE: parameters are passed as a query string
	 */
	@Override
	public HttpRequest parameters(Map parameters) {
		this.parameters.putAll(parameters);
		return this;
	}

	@Override
	public HttpResponse get() {
		BoundRequestBuilder builder = client.prepareGet(getBaseUrl());
		setCommonProperties(builder);
		setContentTypeIfNotPresent(ContentType.TextPlain);
		addAuthorization(builder);
		addHeaders(builder);
		addCookies(builder);
		addQueryParameters(builder);
		addBody(builder);

		try {
			return new HttpResponseNing(builder.execute(), httpService);
		} catch (Exception e) {
			throw new HttpRequestException(e, "Failed to create a GET request: %s", e.getMessage());
		}
	}

	@Override
	public HttpResponse post() {
		BoundRequestBuilder builder = client.preparePost(getBaseUrl());
		setCommonProperties(builder);
		setContentTypeIfNotPresent(ContentType.ApplicationFormUrlEncoded);
		addAuthorization(builder);
		addHeaders(builder);
		addCookies(builder);
		addParameters(builder);
		addBody(builder);

		try {
			return new HttpResponseNing(builder.execute(), httpService);
		} catch (Exception e) {
			throw new HttpRequestException(e, "Failed to create a POST request: %s", e.getMessage());
		}
	}

	@Override
	public HttpResponse put() {
		BoundRequestBuilder builder = client.preparePut(getBaseUrl());
		setCommonProperties(builder);
		setContentTypeIfNotPresent(ContentType.ApplicationFormUrlEncoded);
		addAuthorization(builder);
		addHeaders(builder);
		addCookies(builder);
		addParameters(builder);
		addBody(builder);

		try {
			return new HttpResponseNing(builder.execute(), httpService);
		} catch (Exception e) {
			throw new HttpRequestException(e, "Failed to create a PUT request: %s", e.getMessage());
		}
	}

	@Override
	public HttpResponse delete() {
		BoundRequestBuilder builder = client.prepareDelete(getBaseUrl());
		setCommonProperties(builder);
		setContentTypeIfNotPresent(ContentType.TextPlain);
		addAuthorization(builder);
		addHeaders(builder);
		addCookies(builder);
		addQueryParameters(builder);
		addBody(builder);

		try {
			return new HttpResponseNing(builder.execute(), httpService);
		} catch (Exception e) {
			throw new HttpRequestException(e, "Failed to create a DELETE request: %s", e.getMessage());
		}
	}

	@Override
	public HttpResponse head() {
		BoundRequestBuilder builder = client.prepareHead(getBaseUrl());
		setCommonProperties(builder);
		setContentTypeIfNotPresent(ContentType.TextPlain);
		addAuthorization(builder);
		addHeaders(builder);
		addCookies(builder);
		addQueryParameters(builder);

		try {
			return new HttpResponseNing(builder.execute(), httpService);
		} catch (Exception e) {
			throw new HttpRequestException(e, "Failed to create a HEAD request: %s", e.getMessage());
		}
	}

	@Override
	public HttpRequest authorize(String username, String password, String scheme) {
		this.username = username;
		this.password = password;
		this.scheme = scheme;
		return this;
	}

	public HttpRequest authorize(String username, String password) {
		return authorize(username, password, HttpSupport.Authorizations.Basic);
	}

	public HttpRequest files(FileParameter... fileParameters) {
		this.fileParameters = Arrays.asList(fileParameters);
		return this;
	}

	public HttpRequest files(List fileParameters) {
		this.fileParameters = fileParameters;
		return this;
	}

	protected String basicAuthHeader() {
		return "Basic " + Base64.encodeToString(this.username + ":" + this.password);
	}

	protected String encode(String part) {
		try {
			return URLEncoder.encode(part, encoding);
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	protected String createQueryString() {
		StringBuilder sb = new StringBuilder();
		for (String key : this.parameters.keySet()) {
			if (sb.length() > 0) {
				sb.append("&");
			}
			Object value = this.parameters.get(key);

			if (value != null) {
				if (value instanceof Collection || value.getClass().isArray()) {
					Collection values = value.getClass().isArray() ? Arrays.asList((Object[]) value) : (Collection) value;
					boolean first = true;
					for (Object v : values) {
						if (!first) {
							sb.append("&");
						}
						first = false;
						sb.append(encode(key)).append("=").append(encode(v.toString()));
					}
				} else {
					sb.append(encode(key)).append("=").append(encode(this.parameters.get(key).toString()));
				}
			}
		}
		return sb.toString();
	}

	private void setCommonProperties(BoundRequestBuilder builder) {
		builder.setFollowRedirects(followRedirects);
		builder.setBodyEncoding(encoding);
	}

	private void addCookies(BoundRequestBuilder builder) {
		List cookies = Expressive.Transformers.transformAllUsing(NingTransformers.toNingCookie).from(this.cookies);
		for (com.ning.http.client.Cookie cookie : cookies) {
			builder.addCookie(cookie);
		}
	}

	private void addHeaders(BoundRequestBuilder builder) {
		for (Map.Entry header : headers.entrySet()) {
			builder.addHeader(header.getKey(), StringUtil.toString(header.getValue()));
		}
	}

	private void addQueryParameters(BoundRequestBuilder builder) {
		for (Map.Entry parameter : parameters.entrySet()) {
			builder.addQueryParameter(parameter.getKey(), StringUtil.toString(parameter.getValue()));
		}
	}

	private void addParameters(BoundRequestBuilder builder) {
		for (Map.Entry parameter : parameters.entrySet()) {
			builder.addParameter(parameter.getKey(), StringUtil.toString(parameter.getValue()));
		}
	}

	private void addAuthorization(BoundRequestBuilder builder) {
		if (username != null && password != null) {
			if (HttpSupport.Authorizations.Basic.equalsIgnoreCase(scheme)) {
				String authorisation = HttpSupport.Authorizations.Basic + " " + new Encoder(this.username + ":" + this.password).base64().string();
				builder.addHeader(HttpSupport.Header.Authorization, authorisation);
			} else {
				throw new HttpRequestException("%s only currently supports %s authorization", HttpServiceNing.class.getSimpleName(), HttpSupport.Authorizations.Basic);
			}
		}
	}

	private void addBody(BoundRequestBuilder builder) {
		if (body != null) {
			InputStream is = httpService.convertOutgoing(body);
			builder.setBody(is);
		}
	}

	/**
	 * Return the request url without any request parameters
	 * 
	 * @return
	 */
	private String getBaseUrl() {
		return StringUtil.cutToIndexOf(url, '?');
	}

	private void setContentTypeIfNotPresent(ContentType contentType) {
		if (!headers.containsKey(Header.ContentType)) {
			header(Header.ContentType, contentType.value());
		}
	}
}