Example usage for org.apache.commons.httpclient HostConfiguration setProxyHost

List of usage examples for org.apache.commons.httpclient HostConfiguration setProxyHost

Introduction

In this page you can find the example usage for org.apache.commons.httpclient HostConfiguration setProxyHost.

Prototype

public void setProxyHost(ProxyHost paramProxyHost)

Source Link

Usage

From source file:com.twinsoft.convertigo.engine.servlets.ReverseProxyServlet.java

/**
 * Executes the {@link HttpMethod} passed in and sends the proxy response
 * back to the client via the given {@link HttpServletResponse}
 * /*from   w  ww .j  a  v  a  2 s .c  o  m*/
 * @param httpMethodProxyRequest
 *            An object representing the proxy request to be made
 * @param httpServletResponse
 *            An object by which we can send the proxied response back to
 *            the client
 * @throws IOException
 *             Can be thrown by the {@link HttpClient}.executeMethod
 * @throws ServletException
 *             Can be thrown to indicate that another error has occurred
 * @throws EngineException
 */
private void doRequest(HttpMethodType httpMethodType, HttpServletRequest httpServletRequest,
        HttpServletResponse httpServletResponse) throws IOException, ServletException {
    try {
        Engine.logEngine.debug("(ReverseProxyServlet) Starting request handling");

        if (Boolean.parseBoolean(EnginePropertiesManager.getProperty(PropertyName.SSL_DEBUG))) {
            System.setProperty("javax.net.debug", "all");
            Engine.logEngine.trace("(ReverseProxyServlet) Enabling SSL debug mode");
        } else {
            System.setProperty("javax.net.debug", "");
            Engine.logEngine.debug("(ReverseProxyServlet) Disabling SSL debug mode");
        }

        String baseUrl;
        String projectName;
        String connectorName;
        String contextName;
        String extraPath;

        {
            String requestURI = httpServletRequest.getRequestURI();
            Engine.logEngine.trace("(ReverseProxyServlet) Requested URI : " + requestURI);
            Matcher m = reg_fields.matcher(requestURI);
            if (m.matches() && m.groupCount() >= 5) {
                baseUrl = m.group(1);
                projectName = m.group(2);
                connectorName = m.group(3);
                contextName = m.group(4);
                extraPath = m.group(5);
            } else {
                throw new MalformedURLException(
                        "The request doesn't contains needed fields : projectName, connectorName and contextName");
            }
        }

        String sessionID = httpServletRequest.getSession().getId();

        Engine.logEngine.debug("(ReverseProxyServlet) baseUrl : " + baseUrl + " ; projectName : " + projectName
                + " ; connectorName : " + connectorName + " ; contextName : " + contextName + " ; extraPath : "
                + extraPath + " ; sessionID : " + sessionID);

        Context context = Engine.theApp.contextManager.get(null, contextName, sessionID, null, projectName,
                connectorName, null);

        Project project = Engine.theApp.databaseObjectsManager.getProjectByName(projectName);
        context.projectName = projectName;
        context.project = project;

        ProxyHttpConnector proxyHttpConnector = (ProxyHttpConnector) project.getConnectorByName(connectorName);
        context.connector = proxyHttpConnector;
        context.connectorName = proxyHttpConnector.getName();

        HostConfiguration hostConfiguration = proxyHttpConnector.hostConfiguration;

        // Proxy configuration
        String proxyServer = Engine.theApp.proxyManager.getProxyServer();
        String proxyUser = Engine.theApp.proxyManager.getProxyUser();
        String proxyPassword = Engine.theApp.proxyManager.getProxyPassword();
        int proxyPort = Engine.theApp.proxyManager.getProxyPort();

        if (!proxyServer.equals("")) {
            hostConfiguration.setProxy(proxyServer, proxyPort);
            Engine.logEngine.debug("(ReverseProxyServlet) Using proxy: " + proxyServer + ":" + proxyPort);
        } else {
            // Remove old proxy configuration
            hostConfiguration.setProxyHost(null);
        }

        String targetHost = proxyHttpConnector.getServer();
        Engine.logEngine.debug("(ReverseProxyServlet) Target host: " + targetHost);
        int targetPort = proxyHttpConnector.getPort();
        Engine.logEngine.debug("(ReverseProxyServlet) Target port: " + targetPort);

        // Configuration SSL
        Engine.logEngine.debug("(ReverseProxyServlet) Https: " + proxyHttpConnector.isHttps());
        CertificateManager certificateManager = proxyHttpConnector.certificateManager;
        boolean trustAllServerCertificates = proxyHttpConnector.isTrustAllServerCertificates();

        if (proxyHttpConnector.isHttps()) {
            Engine.logEngine.debug("(ReverseProxyServlet) Setting up SSL properties");
            certificateManager.collectStoreInformation(context);

            Engine.logEngine.debug(
                    "(ReverseProxyServlet) CertificateManager has changed: " + certificateManager.hasChanged);
            if (certificateManager.hasChanged || (!targetHost.equalsIgnoreCase(hostConfiguration.getHost()))
                    || (hostConfiguration.getPort() != targetPort)) {
                Engine.logEngine
                        .debug("(ReverseProxyServlet) Using MySSLSocketFactory for creating the SSL socket");
                Protocol myhttps = new Protocol("https",
                        MySSLSocketFactory.getSSLSocketFactory(certificateManager.keyStore,
                                certificateManager.keyStorePassword, certificateManager.trustStore,
                                certificateManager.trustStorePassword, trustAllServerCertificates),
                        targetPort);

                hostConfiguration.setHost(targetHost, targetPort, myhttps);
            }

            Engine.logEngine.debug("(ReverseProxyServlet) Updated host configuration for SSL purposes");
        } else {
            hostConfiguration.setHost(targetHost, targetPort);
        }

        HttpMethod httpMethodProxyRequest;

        String targetPath = proxyHttpConnector.getBaseDir() + extraPath;

        // Handle the query string
        if (httpServletRequest.getQueryString() != null) {
            targetPath += "?" + httpServletRequest.getQueryString();
        }
        Engine.logEngine.debug("(ReverseProxyServlet) Target path: " + targetPath);

        Engine.logEngine.debug("(ReverseProxyServlet) Requested method: " + httpMethodType);

        if (httpMethodType == HttpMethodType.GET) {
            // Create a GET request
            httpMethodProxyRequest = new GetMethod();
        } else if (httpMethodType == HttpMethodType.POST) {
            // Create a standard POST request
            httpMethodProxyRequest = new PostMethod();
            ((PostMethod) httpMethodProxyRequest)
                    .setRequestEntity(new InputStreamRequestEntity(httpServletRequest.getInputStream()));
        } else {
            throw new IllegalArgumentException("Unknown HTTP method: " + httpMethodType);
        }

        String charset = httpMethodProxyRequest.getParams().getUriCharset();
        URI targetURI;
        try {
            targetURI = new URI(targetPath, true, charset);
        } catch (URIException e) {
            // Bugfix #1484
            String newTargetPath = "";
            for (String part : targetPath.split("&")) {
                if (!newTargetPath.equals("")) {
                    newTargetPath += "&";
                }
                String[] pair = part.split("=");
                try {
                    newTargetPath += URLDecoder.decode(pair[0], "UTF-8") + "="
                            + (pair.length > 1 ? URLEncoder.encode(URLDecoder.decode(pair[1], "UTF-8"), "UTF-8")
                                    : "");
                } catch (UnsupportedEncodingException ee) {
                    newTargetPath = targetPath;
                }
            }

            targetURI = new URI(newTargetPath, true, charset);
        }
        httpMethodProxyRequest.setURI(targetURI);

        // Tells the method to automatically handle authentication.
        httpMethodProxyRequest.setDoAuthentication(true);

        HttpState httpState = getHttpState(proxyHttpConnector, context);

        String basicUser = proxyHttpConnector.getAuthUser();
        String basicPassword = proxyHttpConnector.getAuthPassword();
        String givenBasicUser = proxyHttpConnector.getGivenAuthUser();
        String givenBasicPassword = proxyHttpConnector.getGivenAuthPassword();

        // Basic authentication configuration
        String realm = null;
        if (!basicUser.equals("") || (basicUser.equals("") && (givenBasicUser != null))) {
            String userName = ((givenBasicUser == null) ? basicUser : givenBasicUser);
            String userPassword = ((givenBasicPassword == null) ? basicPassword : givenBasicPassword);
            httpState.setCredentials(new AuthScope(targetHost, targetPort, realm),
                    new UsernamePasswordCredentials(userName, userPassword));
            Engine.logEngine.debug("(ReverseProxyServlet) Credentials: " + userName + ":******");
        }

        // Setting basic authentication for proxy
        if (!proxyServer.equals("") && !proxyUser.equals("")) {
            httpState.setProxyCredentials(new AuthScope(proxyServer, proxyPort),
                    new UsernamePasswordCredentials(proxyUser, proxyPassword));
            Engine.logEngine.debug("(ReverseProxyServlet) Proxy credentials: " + proxyUser + ":******");
        }

        // Forward the request headers
        setProxyRequestHeaders(httpServletRequest, httpMethodProxyRequest, proxyHttpConnector);

        // Use the CEMS HttpClient
        HttpClient httpClient = Engine.theApp.httpClient;
        httpMethodProxyRequest.setFollowRedirects(false);

        // Execute the request
        int intProxyResponseCode = httpClient.executeMethod(hostConfiguration, httpMethodProxyRequest,
                httpState);

        // Check if the proxy response is a redirect
        // The following code is adapted from
        // org.tigris.noodle.filters.CheckForRedirect
        // Hooray for open source software
        if (intProxyResponseCode >= HttpServletResponse.SC_MULTIPLE_CHOICES /* 300 */
                && intProxyResponseCode < HttpServletResponse.SC_NOT_MODIFIED /* 304 */) {
            String stringStatusCode = Integer.toString(intProxyResponseCode);
            String stringLocation = httpMethodProxyRequest.getResponseHeader(STRING_LOCATION_HEADER).getValue();
            if (stringLocation == null) {
                throw new ServletException("Received status code: " + stringStatusCode + " but no "
                        + STRING_LOCATION_HEADER + " header was found in the response");
            }
            // Modify the redirect to go to this proxy servlet rather that
            // the
            // proxied host
            String redirect = handleRedirect(stringLocation, baseUrl, proxyHttpConnector);
            httpServletResponse.sendRedirect(redirect);
            Engine.logEngine.debug("(ReverseProxyServlet) Send redirect (" + redirect + ")");
            return;
        } else if (intProxyResponseCode == HttpServletResponse.SC_NOT_MODIFIED) {
            // 304 needs special handling. See:
            // http://www.ics.uci.edu/pub/ietf/http/rfc1945.html#Code304
            // We get a 304 whenever passed an 'If-Modified-Since'
            // header and the data on disk has not changed; server
            // responds w/ a 304 saying I'm not going to send the
            // body because the file has not changed.
            httpServletResponse.setIntHeader(STRING_CONTENT_LENGTH_HEADER_NAME, 0);
            httpServletResponse.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
            Engine.logEngine.debug("(ReverseProxyServlet) NOT MODIFIED (304)");
            return;
        }

        // Pass the response code back to the client
        httpServletResponse.setStatus(intProxyResponseCode);

        // Pass response headers back to the client
        Engine.logEngine.debug("(ReverseProxyServlet) Response headers back to the client:");
        Header[] headerArrayResponse = httpMethodProxyRequest.getResponseHeaders();
        for (Header header : headerArrayResponse) {
            String headerName = header.getName();
            String headerValue = header.getValue();
            if (!headerName.equalsIgnoreCase("Transfer-Encoding")
                    && !headerName.equalsIgnoreCase("Set-Cookie")) {
                httpServletResponse.setHeader(headerName, headerValue);
                Engine.logEngine.debug("   " + headerName + "=" + headerValue);
            }
        }

        String contentType = null;
        Header[] contentTypeHeaders = httpMethodProxyRequest.getResponseHeaders("Content-Type");
        for (Header contentTypeHeader : contentTypeHeaders) {
            contentType = contentTypeHeader.getValue();
            break;
        }

        String pageCharset = "UTF-8";
        if (contentType != null) {
            int iCharset = contentType.indexOf("charset=");
            if (iCharset != -1) {
                pageCharset = contentType.substring(iCharset + "charset=".length()).trim();
            }
            Engine.logEngine.debug("(ReverseProxyServlet) Using charset: " + pageCharset);
        }

        InputStream siteIn = httpMethodProxyRequest.getResponseBodyAsStream();

        // Handle gzipped content
        Header[] contentEncodingHeaders = httpMethodProxyRequest.getResponseHeaders("Content-Encoding");
        boolean bGZip = false, bDeflate = false;
        for (Header contentEncodingHeader : contentEncodingHeaders) {
            HeaderElement[] els = contentEncodingHeader.getElements();
            for (int j = 0; j < els.length; j++) {
                if ("gzip".equals(els[j].getName())) {
                    Engine.logBeans.debug("(ReverseProxyServlet) Decode GZip stream");
                    siteIn = new GZIPInputStream(siteIn);
                    bGZip = true;
                } else if ("deflate".equals(els[j].getName())) {
                    Engine.logBeans.debug("(ReverseProxyServlet) Decode Deflate stream");
                    siteIn = new InflaterInputStream(siteIn, new Inflater(true));
                    bDeflate = true;
                }
            }
        }

        byte[] bytesDataResult;

        ByteArrayOutputStream baos = new ByteArrayOutputStream(2048);

        // String resourceUrl = projectName + targetPath;

        String t = context.statistics.start(EngineStatistics.APPLY_USER_REQUEST);

        try {
            // Read either from the cache, either from the remote server
            // InputStream is = proxyCacheManager.getResource(resourceUrl);
            // if (is != null) {
            // Engine.logEngine.debug("(ReverseProxyServlet) Getting data from cache");
            // siteIn = is;
            // }
            int c = siteIn.read();
            while (c > -1) {
                baos.write(c);
                c = siteIn.read();
            }
            // if (is != null) is.close();
        } finally {
            context.statistics.stop(t, true);
        }

        bytesDataResult = baos.toByteArray();
        baos.close();
        Engine.logEngine.debug("(ReverseProxyServlet) Data retrieved!");

        // if (isDynamicContent(httpServletRequest.getPathInfo(),
        // proxyHttpConnector.getDynamicContentFiles())) {
        Engine.logEngine.debug("(ReverseProxyServlet) Dynamic content");

        bytesDataResult = handleStringReplacements(baseUrl, contentType, pageCharset, proxyHttpConnector,
                bytesDataResult);

        String billingClassName = context.getConnector().getBillingClassName();
        if (billingClassName != null) {
            try {
                Engine.logContext.debug("Billing class name required: " + billingClassName);
                AbstractBiller biller = (AbstractBiller) Class.forName(billingClassName).newInstance();
                Engine.logContext.debug("Executing the biller");
                biller.insertBilling(context);
            } catch (Throwable e) {
                Engine.logContext.warn("Unable to execute the biller (the billing is thus ignored): ["
                        + e.getClass().getName() + "] " + e.getMessage());
            }
        }
        // }
        // else {
        // Engine.logEngine.debug("(ReverseProxyServlet) Static content: " +
        // contentType);
        //            
        // // Determine if the resource has already been cached or not
        // CacheEntry cacheEntry =
        // proxyCacheManager.getCacheEntry(resourceUrl);
        // if (cacheEntry instanceof FileCacheEntry) {
        // FileCacheEntry fileCacheEntry = (FileCacheEntry) cacheEntry;
        // File file = new File(fileCacheEntry.fileName);
        // if (!file.exists())
        // proxyCacheManager.removeCacheEntry(cacheEntry);
        // cacheEntry = null;
        // }
        // if (cacheEntry == null) {
        // bytesDataResult = handleStringReplacements(contentType,
        // proxyHttpConnector, bytesDataResult);
        //
        // if (intProxyResponseCode == 200) {
        // Engine.logEngine.debug("(ReverseProxyServlet) Resource stored: "
        // + resourceUrl);
        // cacheEntry = proxyCacheManager.storeResponse(resourceUrl,
        // bytesDataResult);
        // cacheEntry.contentLength = bytesDataResult.length;
        // cacheEntry.contentType = contentType;
        // Engine.logEngine.debug("(ReverseProxyServlet) Cache entry: " +
        // cacheEntry);
        // }
        // }
        // }

        // Send the content to the client
        if (Engine.logEngine.isDebugEnabled() && MimeType.Html.is(contentType)) {
            Engine.logEngine.debug("Data proxied:\n" + new String(bytesDataResult, pageCharset));
        }

        if (bGZip || bDeflate) {
            baos = new ByteArrayOutputStream();
            OutputStream compressedOutputStream = bGZip ? new GZIPOutputStream(baos)
                    : new DeflaterOutputStream(baos,
                            new Deflater(Deflater.DEFAULT_COMPRESSION | Deflater.DEFAULT_STRATEGY, true));
            compressedOutputStream.write(bytesDataResult);
            compressedOutputStream.close();
            bytesDataResult = baos.toByteArray();
            baos.close();
        }

        httpServletResponse.setContentLength(bytesDataResult.length);
        OutputStream outputStreamClientResponse = httpServletResponse.getOutputStream();
        outputStreamClientResponse.write(bytesDataResult);

        Engine.logEngine.debug("(ReverseProxyServlet) End of document retransmission");
    } catch (Exception e) {
        Engine.logEngine.error("Error while trying to proxy page", e);
        throw new ServletException("Error while trying to proxy page", e);
    }
}

From source file:org.crosswire.common.util.WebResource.java

public WebResource(URI theURI, String theProxyHost, Integer theProxyPort) {
    uri = theURI;/*  ww  w . j  ava 2  s.  c  om*/
    client = new HttpClient();
    HostConfiguration config = client.getHostConfiguration();
    config.setHost(new HttpHost(theURI.getHost(), theURI.getPort()));
    if (theProxyHost != null && theProxyHost.length() > 0) {
        config.setProxyHost(new ProxyHost(theProxyHost, theProxyPort == null ? -1 : theProxyPort.intValue()));
    }
}

From source file:org.eclipse.mylyn.commons.net.WebUtil.java

private static void configureHttpClientProxy(HttpClient client, HostConfiguration hostConfiguration,
        AbstractWebLocation location) {/* w w w . ja v a2  s  .c om*/
    String host = WebUtil.getHost(location.getUrl());

    Proxy proxy;
    if (WebUtil.isRepositoryHttps(location.getUrl())) {
        proxy = location.getProxyForHost(host, IProxyData.HTTPS_PROXY_TYPE);
    } else {
        proxy = location.getProxyForHost(host, IProxyData.HTTP_PROXY_TYPE);
    }

    if (proxy != null && !Proxy.NO_PROXY.equals(proxy)) {
        InetSocketAddress address = (InetSocketAddress) proxy.address();
        hostConfiguration.setProxy(address.getHostName(), address.getPort());
        if (proxy instanceof AuthenticatedProxy) {
            AuthenticatedProxy authProxy = (AuthenticatedProxy) proxy;
            Credentials credentials = getCredentials(authProxy.getUserName(), authProxy.getPassword(),
                    address.getAddress());
            AuthScope proxyAuthScope = new AuthScope(address.getHostName(), address.getPort(),
                    AuthScope.ANY_REALM);
            client.getState().setProxyCredentials(proxyAuthScope, credentials);
        }
    } else {
        hostConfiguration.setProxyHost(null);
    }
}

From source file:org.lockss.plugin.silverchair.PostHttpClientUrlConnection.java

/** Execute the request. */
public void execute() throws IOException {
    assertNotExecuted();//from w ww .  j  a  v a 2 s  . co  m
    if (methodCode != LockssUrlConnection.METHOD_PROXY) {
        mimicSunRequestHeaders();
    }
    HostConfiguration hostConfig = client.getHostConfiguration();
    if (proxyHost != null) {
        hostConfig.setProxy(proxyHost, proxyPort);
    } else {
        hostConfig.setProxyHost(null);
    }
    if (localAddress != null) {
        hostConfig.setLocalAddress(localAddress.getInetAddr());
    } else {
        hostConfig.setLocalAddress(null);
    }
    if (sockFact != null) {
        SecureProtocolSocketFactory hcSockFact = sockFact.getHttpClientSecureProtocolSocketFactory();
        String host = url.getHost();
        int port = url.getPort();
        if (port <= 0) {
            port = UrlUtil.getDefaultPort(url.getProtocol().toLowerCase());
        }
        DISP_FACT.setFactory(host, port, hcSockFact);
        // XXX Would like to check after connection is made that cert check
        // was actually done, but there's no good way to get to the socket or
        // SSLContect, etc.
        isAuthenticatedServer = sockFact.requiresServerAuth();
    }
    isExecuted = true;
    responseCode = executeOnce(method);
}

From source file:org.parosproxy.paros.network.HttpSender.java

public int executeMethod(HttpMethod method, HttpState state) throws IOException {
    int responseCode = -1;

    String hostName;//from   w ww . jav a 2s  .  com
    hostName = method.getURI().getHost();
    method.setDoAuthentication(true);
    HostConfiguration hc = null;

    HttpClient requestClient;
    if (param.isUseProxy(hostName)) {
        requestClient = clientViaProxy;

    } else {
        // ZAP: use custom client on upgrade connection and on event-source data type
        Header connectionHeader = method.getRequestHeader("connection");
        boolean isUpgrade = connectionHeader != null
                && connectionHeader.getValue().toLowerCase().contains("upgrade");

        // ZAP: try to apply original handling of ParosProxy
        requestClient = client;
        if (isUpgrade) {
            // Unless upgrade, when using another client that allows us to expose the socket
            // connection.
            requestClient = new HttpClient(new ZapHttpConnectionManager());
        }
    }

    if (this.initiator == CHECK_FOR_UPDATES_INITIATOR) {
        // Use the 'strict' SSLConnector, ie one that performs all the usual cert checks
        // The 'standard' one 'trusts' everything
        // This is to ensure that all 'check-for update' calls are made to the expected https urls
        // without this is would be possible to intercept and change the response which could result
        // in the user downloading and installing a malicious add-on
        hc = new HostConfiguration() {
            @Override
            public synchronized void setHost(URI uri) {
                try {
                    setHost(new HttpHost(uri.getHost(), uri.getPort(), getProtocol()));
                } catch (URIException e) {
                    throw new IllegalArgumentException(e.toString());
                }
            };
        };

        hc.setHost(hostName, method.getURI().getPort(),
                new Protocol("https", (ProtocolSocketFactory) new SSLConnector(false), 443));
        if (param.isUseProxy(hostName)) {
            hc.setProxyHost(new ProxyHost(param.getProxyChainName(), param.getProxyChainPort()));
            if (param.isUseProxyChainAuth()) {
                requestClient.getState().setProxyCredentials(getAuthScope(param), getNTCredentials(param));
            }
        }
    }

    // ZAP: Check if a custom state is being used
    if (state != null) {
        // Make sure cookies are enabled
        method.getParams().setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
    }
    responseCode = requestClient.executeMethod(hc, method, state);

    return responseCode;
}

From source file:org.springframework.security.saml.websso.ArtifactResolutionProfileImplTest.java

/**
 * Verifies that hostConfiguration is correctly cloned when HttpClient contains defaults.
 *//*from  w  w  w  .ja va  2s. c  o  m*/
@Test
public void testHostConfigurationWithDefaults() throws Exception {

    // Client object with default settings
    HttpClient client = new HttpClient();
    HostConfiguration defaultConfiguration = new HostConfiguration();
    defaultConfiguration.setProxy("testProxy", 8000);
    defaultConfiguration.getParams().setParameter("testParam", "testValue");
    client.setHostConfiguration(defaultConfiguration);

    ArtifactResolutionProfileImpl artifactResolutionProfile = new ArtifactResolutionProfileImpl(client);
    URI uri = new URI("http", "test", "/artifact", null);
    HostConfiguration hostConfiguration = artifactResolutionProfile.getHostConfiguration(uri, null);

    // Verify that settings were cloned
    assertNotNull(hostConfiguration);
    assertEquals("test", hostConfiguration.getHost());
    assertEquals("testProxy", hostConfiguration.getProxyHost());
    assertEquals(8000, hostConfiguration.getProxyPort());
    assertEquals("testValue", hostConfiguration.getParams().getParameter("testParam"));

    // Make sure default object and newly created configuration are independent
    defaultConfiguration.setProxyHost(null);
    assertEquals("testProxy", hostConfiguration.getProxyHost());
    assertEquals(8000, hostConfiguration.getProxyPort());

}

From source file:org.tuckey.web.filters.urlrewrite.RequestProxy.java

/**
 * This method performs the proxying of the request to the target address.
 *
 * @param target     The target address. Has to be a fully qualified address. The request is send as-is to this address.
 * @param hsRequest  The request data which should be send to the
 * @param hsResponse The response data which will contain the data returned by the proxied request to target.
 * @throws java.io.IOException Passed on from the connection logic.
 *//*from www. j av  a  2s. co  m*/
public static void execute(final String target, final HttpServletRequest hsRequest,
        final HttpServletResponse hsResponse) throws IOException {
    if (log.isInfoEnabled()) {
        log.info("execute, target is " + target);
        log.info("response commit state: " + hsResponse.isCommitted());
    }

    if (StringUtils.isBlank(target)) {
        log.error("The target address is not given. Please provide a target address.");
        return;
    }

    log.info("checking url");
    final URL url;
    try {
        url = new URL(target);
    } catch (MalformedURLException e) {
        log.error("The provided target url is not valid.", e);
        return;
    }

    log.info("seting up the host configuration");

    final HostConfiguration config = new HostConfiguration();

    ProxyHost proxyHost = getUseProxyServer((String) hsRequest.getAttribute("use-proxy"));
    if (proxyHost != null)
        config.setProxyHost(proxyHost);

    final int port = url.getPort() != -1 ? url.getPort() : url.getDefaultPort();
    config.setHost(url.getHost(), port, url.getProtocol());

    if (log.isInfoEnabled())
        log.info("config is " + config.toString());

    final HttpMethod targetRequest = setupProxyRequest(hsRequest, url);
    if (targetRequest == null) {
        log.error("Unsupported request method found: " + hsRequest.getMethod());
        return;
    }

    //perform the reqeust to the target server
    final HttpClient client = new HttpClient(new SimpleHttpConnectionManager());
    if (log.isInfoEnabled()) {
        log.info("client state" + client.getState());
        log.info("client params" + client.getParams().toString());
        log.info("executeMethod / fetching data ...");
    }

    final int result;
    if (targetRequest instanceof EntityEnclosingMethod) {
        final RequestProxyCustomRequestEntity requestEntity = new RequestProxyCustomRequestEntity(
                hsRequest.getInputStream(), hsRequest.getContentLength(), hsRequest.getContentType());
        final EntityEnclosingMethod entityEnclosingMethod = (EntityEnclosingMethod) targetRequest;
        entityEnclosingMethod.setRequestEntity(requestEntity);
        result = client.executeMethod(config, entityEnclosingMethod);

    } else {
        result = client.executeMethod(config, targetRequest);
    }

    //copy the target response headers to our response
    setupResponseHeaders(targetRequest, hsResponse);

    InputStream originalResponseStream = targetRequest.getResponseBodyAsStream();
    //the body might be null, i.e. for responses with cache-headers which leave out the body
    if (originalResponseStream != null) {
        OutputStream responseStream = hsResponse.getOutputStream();
        copyStream(originalResponseStream, responseStream);
    }

    log.info("set up response, result code was " + result);
}

From source file:org.yccheok.jstock.engine.Utils.java

/**
 * Initialize HttpClient with information from system properties.
 *
 * @param httpClient HttpClient to be initialized
 *///ww  w. jav a 2  s .c  o  m
public static void setHttpClientProxyFromSystemProperties(HttpClient httpClient) {
    final String httpproxyHost = System.getProperties().getProperty("http.proxyHost");
    final String httpproxyPort = System.getProperties().getProperty("http.proxyPort");

    if (null == httpproxyHost || null == httpproxyPort) {
        HostConfiguration hostConfiguration = httpClient.getHostConfiguration();
        hostConfiguration.setProxyHost(null);
    } else {
        int port = -1;
        try {
            port = Integer.parseInt(httpproxyPort);
        } catch (NumberFormatException exp) {
        }

        if (isValidPortNumber(port)) {
            HostConfiguration hostConfiguration = httpClient.getHostConfiguration();
            hostConfiguration.setProxy(httpproxyHost, port);
        } else {
            HostConfiguration hostConfiguration = httpClient.getHostConfiguration();
            hostConfiguration.setProxyHost(null);
        }
    }
}