From 5f895eb42e38f07fee110d0bcce0d5a576a0a9ce Mon Sep 17 00:00:00 2001 From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?= Date: Wed, 2 Jan 2013 15:54:41 +0100 Subject: [PATCH] Add HTTP query and state. --- pom.xml | 5 + .../pterodactylus/reactor/queries/HttpQuery.java | 92 ++++++++++++ .../pterodactylus/reactor/states/HttpState.java | 154 +++++++++++++++++++++ 3 files changed, 251 insertions(+) create mode 100644 src/main/java/net/pterodactylus/reactor/queries/HttpQuery.java create mode 100644 src/main/java/net/pterodactylus/reactor/states/HttpState.java diff --git a/pom.xml b/pom.xml index 58e6a00..3d6265c 100644 --- a/pom.xml +++ b/pom.xml @@ -30,5 +30,10 @@ log4j 1.2.17 + + org.apache.httpcomponents + httpclient + 4.2.2 + diff --git a/src/main/java/net/pterodactylus/reactor/queries/HttpQuery.java b/src/main/java/net/pterodactylus/reactor/queries/HttpQuery.java new file mode 100644 index 0000000..c514084 --- /dev/null +++ b/src/main/java/net/pterodactylus/reactor/queries/HttpQuery.java @@ -0,0 +1,92 @@ +/* + * Reactor - HttpQuery.java - Copyright © 2013 David Roden + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +package net.pterodactylus.reactor.queries; + +import java.io.IOException; +import java.io.InputStreamReader; + +import net.pterodactylus.reactor.Query; +import net.pterodactylus.reactor.State; +import net.pterodactylus.reactor.states.FailedState; +import net.pterodactylus.reactor.states.HttpState; + +import org.apache.http.HttpEntity; +import org.apache.http.HttpResponse; +import org.apache.http.HttpStatus; +import org.apache.http.client.methods.HttpGet; +import org.apache.http.client.protocol.ResponseContentEncoding; +import org.apache.http.impl.client.DefaultHttpClient; +import org.apache.http.util.EntityUtils; + +import com.google.common.io.Closeables; + +/** + * {@link Query} that performs an HTTP GET request to a fixed uri. + * + * @author David ‘Bombe’ Roden + */ +public class HttpQuery implements Query { + + /** The uri to request. */ + private final String uri; + + /** + * Creates a new HTTP query. + * + * @param uri + * The uri to request + */ + public HttpQuery(String uri) { + this.uri = uri; + } + + // + // QUERY METHODS + // + + /** + * {@inheritDoc} + */ + @Override + @SuppressWarnings("deprecation") + public State state() { + DefaultHttpClient httpClient = new DefaultHttpClient(); + httpClient.addResponseInterceptor(new ResponseContentEncoding()); + HttpGet get = new HttpGet(uri); + + InputStreamReader inputStreamReader = null; + try { + /* make request. */ + get.addHeader("Accept-Encoding", "identity"); + HttpResponse response = httpClient.execute(get); + if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) { + return new FailedState(); + } + HttpEntity entity = response.getEntity(); + + /* yay, done! */ + return new HttpState(uri, response.getStatusLine().getStatusCode(), entity.getContentType().getValue(), EntityUtils.toByteArray(entity)); + + } catch (IOException ioe1) { + return new FailedState(ioe1); + } finally { + Closeables.closeQuietly(inputStreamReader); + } + } + +} diff --git a/src/main/java/net/pterodactylus/reactor/states/HttpState.java b/src/main/java/net/pterodactylus/reactor/states/HttpState.java new file mode 100644 index 0000000..38ca80c --- /dev/null +++ b/src/main/java/net/pterodactylus/reactor/states/HttpState.java @@ -0,0 +1,154 @@ +/* + * Reactor - HttpState.java - Copyright © 2013 David Roden + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +package net.pterodactylus.reactor.states; + +import java.io.UnsupportedEncodingException; + +import net.pterodactylus.reactor.State; +import net.pterodactylus.reactor.queries.HttpQuery; + +import org.apache.http.HeaderElement; +import org.apache.http.NameValuePair; +import org.apache.http.message.BasicHeaderValueParser; + +/** + * {@link State} that contains the results of an {@link HttpQuery}. + * + * @author David ‘Bombe’ Roden + */ +public class HttpState extends AbstractState { + + /** The URI that was requested. */ + private final String uri; + + /** The protocol code. */ + private final int protocolCode; + + /** The content type. */ + private final String contentType; + + /** The result. */ + private final byte[] rawResult; + + /** + * Creates a new HTTP state. + * + * @param uri + * The URI that was requested + * @param protocolCode + * The code of the reply + * @param contentType + * The content type of the reply + * @param rawResult + * The raw result + */ + public HttpState(String uri, int protocolCode, String contentType, byte[] rawResult) { + this.uri = uri; + this.protocolCode = protocolCode; + this.contentType = contentType; + this.rawResult = rawResult; + } + + // + // ACCESSORS + // + + /** + * Returns the URI that was requested. + * + * @return The URI that was request + */ + public String uri() { + return uri; + } + + /** + * Returns the protocol code of the reply. + * + * @return The protocol code of the reply + */ + public int protocolCode() { + return protocolCode; + } + + /** + * Returns the content type of the reply. + * + * @return The content type of the reply + */ + public String contentType() { + return contentType; + } + + /** + * Returns the raw result of the reply. + * + * @return The raw result of the reply + */ + public byte[] rawResult() { + return rawResult; + } + + /** + * Returns the decoded content of the reply. This method uses the charset + * information from the {@link #contentType()}, if present, or UTF-8 if no + * content type is present. + * + * @return The decoded content + */ + public String content() { + try { + return new String(rawResult(), extractCharset(contentType())); + } catch (UnsupportedEncodingException uee1) { + throw new RuntimeException(String.format("Could not decode content as %s.", extractCharset(contentType())), uee1); + } + } + + // + // STATIC METHODS + // + + /** + * Extracts charset information from the given content type. + * + * @param contentType + * The content type response header + * @return The extracted charset, or UTF-8 if no charset could be extracted + */ + private static String extractCharset(String contentType) { + if (contentType == null) { + return "UTF-8"; + } + HeaderElement headerElement = BasicHeaderValueParser.parseHeaderElement(contentType, new BasicHeaderValueParser()); + NameValuePair charset = headerElement.getParameterByName("charset"); + return (charset != null) ? charset.getValue() : "UTF-8"; + } + + // + // OBJECT METHODS + // + + /** + * {@inheritDoc} + */ + @Override + public String toString() { + return String.format("%s[uri=%s,protocolCode=%d,contentType=%s,rawResult=(%s bytes)]", getClass().getSimpleName(), uri(), protocolCode(), contentType(), rawResult().length); + } + +} -- 2.7.4