com.rabidgremlin.legalbeagle.util.HttpHelper.java Source code

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Here is the source code for com.rabidgremlin.legalbeagle.util.HttpHelper.java

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/* 
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You 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.rabidgremlin.legalbeagle.util;

import java.io.IOException;
import java.io.StringReader;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;

import org.apache.http.HttpHost;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.fluent.Request;
import org.apache.http.client.fluent.Response;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.rabidgremlin.legalbeagle.maven.MavenArtifact;
import com.rabidgremlin.legalbeagle.xmlbindings.Model;

public class HttpHelper {
    private Unmarshaller u;
    private HttpHost proxy;
    private ObjectMapper mapper = new ObjectMapper();

    public HttpHelper() throws Exception {
        JAXBContext jc = JAXBContext.newInstance("com.rabidgremlin.legalbeagle.xmlbindings");
        u = jc.createUnmarshaller();

        // -Dhttp.proxyHost=prox -Dhttp.proxyPort=1234
        // TODO: better error handling here
        if (System.getProperty("http.proxyHost") != null) {
            proxy = new HttpHost(System.getProperty("http.proxyHost"), Integer.getInteger("http.proxyPort"));
        }

    }

    private JAXBElement<Model> unMarshallPom(String pom) {
        try {
            return (JAXBElement<Model>) u.unmarshal(new StringReader(pom));
        } catch (javax.xml.bind.UnmarshalException e) {
            // System.out.println(e);
            // return null;

            if (e.getMessage().startsWith("unexpected element (uri:\"\", local:\"project\")")) {
                try {
                    pom = pom.replaceFirst("<project>", "<project xmlns=\"http://maven.apache.org/POM/4.0.0\">");

                    // System.out.println("***POM is " + pom);

                    return (JAXBElement<Model>) u.unmarshal(new StringReader(pom));
                } catch (Exception ex) {
                    e.printStackTrace();
                    return null;
                }
            } else {
                e.printStackTrace();
                return null;
            }

        } catch (JAXBException e) {
            return null;
        }

    }

    public Model getPom(MavenArtifact mavenArtifact) throws Exception {
        String requestUrl = "http://search.maven.org/remotecontent?filepath="
                + mavenArtifact.getGroupId().replaceAll("\\.", "/") + "/" + mavenArtifact.getArtifactId() + "/"
                + mavenArtifact.getVersion() + "/" + mavenArtifact.getArtifactId() + "-"
                + mavenArtifact.getVersion() + ".pom";

        // System.out.println("url:" + requestUrl);

        // URL url = new
        // URL("http://search.maven.org/remotecontent?filepath=com/jolira/guice/3.0.0/guice-3.0.0.pom");

        // URL url = new
        // URL("http://repo1.maven.org/maven2/org/eclipse/jetty/jetty-webapp/7.3.0.v20110203/jetty-webapp-7.3.0.v20110203.pom");

        JAXBElement<Model> projectElem = unMarshallPom(executeGet(requestUrl).returnContent().asString());

        // System.out.println(projectElem.toString());
        // System.out.println(projectElem.getName());

        return projectElem.getValue();
    }

    public Model getPom(String sha1Hash) throws Exception {

        String requestUrl = "http://search.maven.org/solrsearch/select?q=1:%22" + sha1Hash + "%22&rows=20&wt=json";

        JsonNode root = mapper.readTree(executeGet(requestUrl).returnContent().asStream());

        // System.out.println(root.toString());

        JsonNode doc = root.path("response").path("docs").get(0);

        if (doc == null) {
            return null;
        }

        return getPom(new MavenArtifact(doc.path("g").asText(), doc.path("a").asText(), doc.path("v").asText()));
    }

    private Response executeGet(String requestUrl) throws ClientProtocolException, IOException {
        if (proxy != null) {
            return Request.Get(requestUrl).viaProxy(proxy).execute();
        } else {
            return Request.Get(requestUrl).execute();
        }
    }
}