Example usage for org.apache.commons.httpclient HttpMethod getResponseHeaders

Introduction

In this page you can find the example usage for org.apache.commons.httpclient HttpMethod getResponseHeaders.

Prototype

public abstract Header[] getResponseHeaders();

Source Link

Usage

From source file:org.infoscoop.request.filter.ProxyFilterContainer.java

public final int invoke(HttpClient client, HttpMethod method, ProxyRequest request) throws Exception {
    int preStatus = prepareInvoke(client, method, request);
    switch (preStatus) {
    case 0:/*from ww  w .  jav  a2 s .  c o  m*/
        break;
    case EXECUTE_POST_STATUS:
        doFilterChain(request, request.getResponseBody());
    default:
        return preStatus;
    }
    // copy headers sent target server
    List ignoreHeaderNames = request.getIgnoreHeaders();
    List allowedHeaderNames = request.getAllowedHeaders();
    boolean allowAllHeader = false;

    Proxy proxy = request.getProxy();
    if (proxy != null) {
        allowAllHeader = proxy.isAllowAllHeader();
        if (!allowAllHeader)
            allowedHeaderNames.addAll(proxy.getAllowedHeaders());
    }

    AuthenticatorUtil.doAuthentication(client, method, request);

    StringBuffer headersSb = new StringBuffer();
    for (String name : request.getRequestHeaders().keySet()) {

        String value = request.getRequestHeader(name);
        String lowname = name.toLowerCase();

        if (!allowAllHeader && !allowedHeaderNames.contains(lowname))
            continue;

        if (ignoreHeaderNames.contains(lowname))
            continue;

        if ("cookie".equalsIgnoreCase(name)) {
            if (proxy.getSendingCookies() != null) {
                value = RequestUtil.removeCookieParam(value, proxy.getSendingCookies());
            }
        }

        if ("if-modified-since".equalsIgnoreCase(name) && "Thu, 01 Jun 1970 00:00:00 GMT".equals(value))
            continue;

        method.addRequestHeader(new Header(name, value));
        headersSb.append(name + "=" + value + ",  ");
    }

    int cacheStatus = getCache(client, method, request);
    if (cacheStatus != 0)
        return cacheStatus;

    if (log.isInfoEnabled())
        log.info("RequestHeader: " + headersSb);

    // execute http method and process redirect
    method.setFollowRedirects(false);

    client.executeMethod(method);

    int statusCode = method.getStatusCode();

    for (int i = 0; statusCode == HttpStatus.SC_MOVED_TEMPORARILY
            || statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_SEE_OTHER
            || statusCode == HttpStatus.SC_TEMPORARY_REDIRECT; i++) {

        // connection release
        method.releaseConnection();

        if (i == 5) {
            log.error("The circular redirect is limited by five times.");
            return 500;
        }

        Header location = method.getResponseHeader("Location");
        String redirectUrl = location.getValue();

        // According to 2,068 1.1 rfc http spec, we cannot appoint the relative URL,
        // but microsoft.com gives back the relative URL.
        if (redirectUrl.startsWith("/")) {
            URI baseURI = method.getURI();
            baseURI.setPath(redirectUrl);

            redirectUrl = baseURI.toString();
        }

        //method.setURI(new URI(redirectUrl, false));
        Header[] headers = method.getRequestHeaders();
        method = new GetMethod(redirectUrl);
        for (int j = 0; j < headers.length; j++) {
            String headerName = headers[j].getName();
            if (!headerName.equalsIgnoreCase("content-length") && !headerName.equalsIgnoreCase("authorization"))
                method.setRequestHeader(headers[j]);
        }
        AuthenticatorUtil.doAuthentication(client, method, request);
        method.setRequestHeader("authorization", request.getRequestHeader("Authorization"));
        method.setFollowRedirects(false);
        client.executeMethod(method);
        statusCode = method.getStatusCode();
        request.setRedirectURL(redirectUrl);

        if (log.isInfoEnabled())
            log.info("Redirect " + request.getTargetURL() + " to " + location + ".");
    }

    // copy response headers to proxyReqeust
    Header[] headers = method.getResponseHeaders();
    for (int i = 0; i < headers.length; i++) {
        request.putResponseHeader(headers[i].getName(), headers[i].getValue());
    }

    if (log.isInfoEnabled())
        log.info("Original Status:" + statusCode);

    // check response code
    if (statusCode == HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED) {
        log.error("Proxy Authentication Required. Confirm ajax proxy setting.");
        throw new Exception(
                "Http Status 407, Proxy Authentication Required. Please contuct System Administrator.");
    }
    if (statusCode == HttpStatus.SC_NOT_MODIFIED || statusCode == HttpStatus.SC_RESET_CONTENT) {
        return statusCode;
    } else if (statusCode < 200 || statusCode >= 300) {
        request.setResponseBody(method.getResponseBodyAsStream());
        return statusCode;
    }

    // process response body
    InputStream responseStream = null;
    if (statusCode != HttpStatus.SC_NO_CONTENT) {
        if (request.allowUserPublicCache()) {
            byte[] responseBody = method.getResponseBody();

            Map<String, List<String>> responseHeaders = request.getResponseHeaders();
            if (request.getRedirectURL() != null)
                responseHeaders.put("X-IS-REDIRECTED-FROM",
                        Arrays.asList(new String[] { request.getRedirectURL() }));
            if (method instanceof GetMethod) {
                putCache(request.getOriginalURL(), new ByteArrayInputStream(responseBody), responseHeaders);
            }

            responseStream = new ByteArrayInputStream(responseBody);
        } else {
            responseStream = method.getResponseBodyAsStream();
        }
    }
    doFilterChain(request, responseStream);

    return statusCode != HttpStatus.SC_NO_CONTENT ? method.getStatusCode() : 200;
}

---

From source file:org.j2free.http.HttpCallResult.java

/**
 * /* w w w.  java  2 s.c o m*/
 * @param method
 * @throws IOException
 */
public HttpCallResult(HttpMethod method) throws IOException {

    this.method = method;
    this.response = method.getResponseBodyAsString();
    this.bytes = method.getResponseBody();

    requestHeaders = new HashMap();
    responseHeaders = new HashMap();

    Header[] headers = method.getRequestHeaders();
    for (Header header : headers) {
        requestHeaders.put(header.getName(), header);
    }

    headers = method.getResponseHeaders();
    for (Header header : headers) {
        responseHeaders.put(header.getName(), header);
    }

    status = method.getStatusLine();
}

---

From source file:org.jboss.orion.openshift.server.proxy.JsonProxyServlet.java

/**
 * Executes the {@link HttpMethod} passed in and sends the proxy response
 * back to the client via the given {@link javax.servlet.http.HttpServletResponse}
 *
 * @param proxyDetails/*ww w .j  a  v a  2s .c om*/
 * @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 java.io.IOException            Can be thrown by the {@link HttpClient}.executeMethod
 * @throws javax.servlet.ServletException Can be thrown to indicate that another error has occurred
 */
private void executeProxyRequest(ProxyDetails proxyDetails, HttpMethod httpMethodProxyRequest,
        HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
        throws IOException, ServletException {
    httpMethodProxyRequest.setDoAuthentication(false);
    httpMethodProxyRequest.setFollowRedirects(false);

    // Create a default HttpClient
    HttpClient httpClient = proxyDetails.createHttpClient(httpMethodProxyRequest);

    // Execute the request
    int intProxyResponseCode = 500;
    try {
        intProxyResponseCode = httpClient.executeMethod(httpMethodProxyRequest);
    } catch (Exception e) {
        e.printStackTrace();
    }

    // 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 stringMyHostName = httpServletRequest.getServerName();
        if (httpServletRequest.getServerPort() != 80) {
            stringMyHostName += ":" + httpServletRequest.getServerPort();
        }
        stringMyHostName += httpServletRequest.getContextPath();
        httpServletResponse.sendRedirect(stringLocation
                .replace(proxyDetails.getProxyHostAndPort() + proxyDetails.getProxyPath(), stringMyHostName));
        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);
        return;
    }

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

    // Pass response headers back to the client
    Header[] headerArrayResponse = httpMethodProxyRequest.getResponseHeaders();
    for (Header header : headerArrayResponse) {
        if (!ProxySupport.isHopByHopHeader(header.getName())) {
            if (ProxySupport.isSetCookieHeader(header)) {
                HttpProxyRule proxyRule = proxyDetails.getProxyRule();
                String setCookie = ProxySupport.replaceCookieAttributes(header.getValue(),
                        proxyRule.getCookiePath(), proxyRule.getCookieDomain());
                httpServletResponse.setHeader(header.getName(), setCookie);
            } else {
                httpServletResponse.setHeader(header.getName(), header.getValue());
            }
        }
    }

    // check if we got data, that is either the Content-Length > 0
    // or the response code != 204
    int code = httpMethodProxyRequest.getStatusCode();
    boolean noData = code == HttpStatus.SC_NO_CONTENT;
    if (!noData) {
        String length = httpServletRequest.getHeader(STRING_CONTENT_LENGTH_HEADER_NAME);
        if (length != null && "0".equals(length.trim())) {
            noData = true;
        }
    }

    if (!noData) {
        // Send the content to the client
        InputStream inputStreamProxyResponse = httpMethodProxyRequest.getResponseBodyAsStream();
        BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStreamProxyResponse);
        OutputStream outputStreamClientResponse = httpServletResponse.getOutputStream();
        int intNextByte;
        while ((intNextByte = bufferedInputStream.read()) != -1) {
            outputStreamClientResponse.write(intNextByte);
        }
    }
}

---

From source file:org.jboss.web.loadbalancer.Loadbalancer.java

protected void parseServerResponse(HttpServletRequest request, HttpServletResponse response, HttpClient client,
        HttpMethod method) throws ServletException, IOException {
    response.setStatus(method.getStatusCode());

    //Cookies//w  w w  .  j ava2 s .c  o  m
    org.apache.commons.httpclient.Cookie[] respCookies = client.getState().getCookies();

    for (int i = 0; i < respCookies.length; ++i) {
        Cookie cookie = new Cookie(respCookies[i].getName(), respCookies[i].getValue());

        if (respCookies[i].getPath() != null) {
            cookie.setPath(respCookies[i].getPath());
        }
        response.addCookie(cookie);
    }

    Header[] header = method.getResponseHeaders();

    for (int i = 0; i < header.length; ++i) {
        if (!ignorableHeader.contains(header[i].getName().toLowerCase())) {
            response.setHeader(header[i].getName(), header[i].getValue());
        }
    }

    copyServerResponse(response, method);
}

---

From source file:org.josso.gl2.gateway.reverseproxy.ReverseProxyValve.java

/**
 * Intercepts Http request and redirects it to the configured SSO partner application.
 *
 * @param request The servlet request to be processed
 * @param response The servlet response to be created
 * @exception IOException if an input/output error occurs
 * @exception javax.servlet.ServletException if a servlet error occurs
 *//*from ww  w .  j a  v a2 s  .  c o m*/
public int invoke(Request request, Response response) throws IOException, ServletException {

    if (debug >= 1)
        log("ReverseProxyValve Acting.");

    ProxyContextConfig[] contexts = _rpc.getProxyContexts();

    // Create an instance of HttpClient.
    HttpClient client = new HttpClient();

    HttpServletRequest hsr = (HttpServletRequest) request.getRequest();
    String uri = hsr.getRequestURI();

    String uriContext = null;

    StringTokenizer st = new StringTokenizer(uri.substring(1), "/");
    while (st.hasMoreTokens()) {
        String token = st.nextToken();
        uriContext = "/" + token;
        break;
    }

    if (uriContext == null)
        uriContext = uri;

    // Obtain the target host from the
    String proxyForwardHost = null;
    String proxyForwardUri = null;

    for (int i = 0; i < contexts.length; i++) {
        if (contexts[i].getContext().equals(uriContext)) {
            log("Proxy context mapped to host/uri: " + contexts[i].getForwardHost()
                    + contexts[i].getForwardUri());
            proxyForwardHost = contexts[i].getForwardHost();
            proxyForwardUri = contexts[i].getForwardUri();
            break;
        }
    }

    if (proxyForwardHost == null) {
        log("URI '" + uri + "' can't be mapped to host");
        //valveContext.invokeNext(request, response);
        return Valve.INVOKE_NEXT;
    }

    if (proxyForwardUri == null) {
        // trim the uri context before submitting the http request
        int uriTrailStartPos = uri.substring(1).indexOf("/") + 1;
        proxyForwardUri = uri.substring(uriTrailStartPos);
    } else {
        int uriTrailStartPos = uri.substring(1).indexOf("/") + 1;
        proxyForwardUri = proxyForwardUri + uri.substring(uriTrailStartPos);
    }

    // log ("Proxy request mapped to " + "http://" + proxyForwardHost + proxyForwardUri);

    HttpMethod method;

    // to be moved to a builder which instantiates and build concrete methods.
    if (hsr.getMethod().equals(METHOD_GET)) {
        // Create a method instance.
        HttpMethod getMethod = new GetMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        method = getMethod;
    } else if (hsr.getMethod().equals(METHOD_POST)) {
        // Create a method instance.
        PostMethod postMethod = new PostMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        postMethod.setRequestBody(hsr.getInputStream());
        method = postMethod;
    } else if (hsr.getMethod().equals(METHOD_HEAD)) {
        // Create a method instance.
        HeadMethod headMethod = new HeadMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        method = headMethod;
    } else if (hsr.getMethod().equals(METHOD_PUT)) {
        method = new PutMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
    } else
        throw new java.lang.UnsupportedOperationException("Unknown method : " + hsr.getMethod());

    // copy incoming http headers to reverse proxy request
    Enumeration hne = hsr.getHeaderNames();
    while (hne.hasMoreElements()) {
        String hn = (String) hne.nextElement();

        // Map the received host header to the target host name
        // so that the configured virtual domain can
        // do the proper handling.
        if (hn.equalsIgnoreCase("host")) {
            method.addRequestHeader("Host", proxyForwardHost);
            continue;
        }

        Enumeration hvals = hsr.getHeaders(hn);
        while (hvals.hasMoreElements()) {
            String hv = (String) hvals.nextElement();
            method.addRequestHeader(hn, hv);
        }
    }

    // Add Reverse-Proxy-Host header
    String reverseProxyHost = getReverseProxyHost(request);
    method.addRequestHeader(Constants.JOSSO_REVERSE_PROXY_HEADER, reverseProxyHost);

    if (debug >= 1)
        log("Sending " + Constants.JOSSO_REVERSE_PROXY_HEADER + " " + reverseProxyHost);

    // DO NOT follow redirects !
    method.setFollowRedirects(false);

    // By default the httpclient uses HTTP v1.1. We are downgrading it
    // to v1.0 so that the target server doesn't set a reply using chunked
    // transfer encoding which doesn't seem to be handled properly.
    // Check how to make chunked transfer encoding work.
    client.getParams().setVersion(new HttpVersion(1, 0));

    // Execute the method.
    int statusCode = -1;
    try {
        // execute the method.
        statusCode = client.executeMethod(method);
    } catch (HttpRecoverableException e) {
        log("A recoverable exception occurred " + e.getMessage());
    } catch (IOException e) {
        log("Failed to connect.");
        e.printStackTrace();
    }

    // Check that we didn't run out of retries.
    if (statusCode == -1) {
        log("Failed to recover from exception.");
    }

    // Read the response body.
    byte[] responseBody = method.getResponseBody();

    // Release the connection.
    method.releaseConnection();

    HttpServletResponse sres = (HttpServletResponse) response.getResponse();

    // First thing to do is to copy status code to response, otherwise
    // catalina will do it as soon as we set a header or some other part of the response.
    sres.setStatus(method.getStatusCode());

    // copy proxy response headers to client response
    Header[] responseHeaders = method.getResponseHeaders();
    for (int i = 0; i < responseHeaders.length; i++) {
        Header responseHeader = responseHeaders[i];
        String name = responseHeader.getName();
        String value = responseHeader.getValue();

        // Adjust the URL in the Location, Content-Location and URI headers on HTTP redirect responses
        // This is essential to avoid by-passing the reverse proxy because of HTTP redirects on the
        // backend servers which stay behind the reverse proxy
        switch (method.getStatusCode()) {
        case HttpStatus.SC_MOVED_TEMPORARILY:
        case HttpStatus.SC_MOVED_PERMANENTLY:
        case HttpStatus.SC_SEE_OTHER:
        case HttpStatus.SC_TEMPORARY_REDIRECT:

            if ("Location".equalsIgnoreCase(name) || "Content-Location".equalsIgnoreCase(name)
                    || "URI".equalsIgnoreCase(name)) {

                // Check that this redirect must be adjusted.
                if (value.indexOf(proxyForwardHost) >= 0) {
                    String trail = value.substring(proxyForwardHost.length());
                    value = getReverseProxyHost(request) + trail;
                    if (debug >= 1)
                        log("Adjusting redirect header to " + value);
                }
            }
            break;

        } //end of switch
        sres.addHeader(name, value);

    }

    // Sometimes this is null, when no body is returned ...
    if (responseBody != null && responseBody.length > 0)
        sres.getOutputStream().write(responseBody);

    sres.getOutputStream().flush();

    if (debug >= 1)
        log("ReverseProxyValve finished.");

    return Valve.END_PIPELINE;
}

---

From source file:org.josso.tc50.gateway.reverseproxy.ReverseProxyValve.java

/**
 * Intercepts Http request and redirects it to the configured SSO partner application.
 *
 * @param request The servlet request to be processed
 * @param response The servlet response to be created
 * @param valveContext The valve _context used to invoke the next valve
 *  in the current processing pipeline/*from ww w .j  a  va2s  .c  o m*/
 * @exception IOException if an input/output error occurs
 * @exception javax.servlet.ServletException if a servlet error occurs
 */
public void invoke(Request request, Response response, ValveContext valveContext)
        throws IOException, javax.servlet.ServletException {

    if (debug >= 1)
        log("ReverseProxyValve Acting.");

    ProxyContextConfig[] contexts = _rpc.getProxyContexts();

    // Create an instance of HttpClient.
    HttpClient client = new HttpClient();

    HttpServletRequest hsr = (HttpServletRequest) request.getRequest();
    String uri = hsr.getRequestURI();

    String uriContext = null;

    StringTokenizer st = new StringTokenizer(uri.substring(1), "/");
    while (st.hasMoreTokens()) {
        String token = st.nextToken();
        uriContext = "/" + token;
        break;
    }

    if (uriContext == null)
        uriContext = uri;

    // Obtain the target host from the
    String proxyForwardHost = null;
    String proxyForwardUri = null;

    for (int i = 0; i < contexts.length; i++) {
        if (contexts[i].getContext().equals(uriContext)) {
            log("Proxy context mapped to host/uri: " + contexts[i].getForwardHost()
                    + contexts[i].getForwardUri());
            proxyForwardHost = contexts[i].getForwardHost();
            proxyForwardUri = contexts[i].getForwardUri();
            break;
        }
    }

    if (proxyForwardHost == null) {
        log("URI '" + uri + "' can't be mapped to host");
        valveContext.invokeNext(request, response);
        return;
    }

    if (proxyForwardUri == null) {
        // trim the uri context before submitting the http request
        int uriTrailStartPos = uri.substring(1).indexOf("/") + 1;
        proxyForwardUri = uri.substring(uriTrailStartPos);
    } else {
        int uriTrailStartPos = uri.substring(1).indexOf("/") + 1;
        proxyForwardUri = proxyForwardUri + uri.substring(uriTrailStartPos);
    }

    // log ("Proxy request mapped to " + "http://" + proxyForwardHost + proxyForwardUri);

    HttpMethod method;

    // to be moved to a builder which instantiates and build concrete methods.
    if (hsr.getMethod().equals(METHOD_GET)) {
        // Create a method instance.
        HttpMethod getMethod = new GetMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        method = getMethod;
    } else if (hsr.getMethod().equals(METHOD_POST)) {
        // Create a method instance.
        PostMethod postMethod = new PostMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        postMethod.setRequestBody(hsr.getInputStream());
        method = postMethod;
    } else if (hsr.getMethod().equals(METHOD_HEAD)) {
        // Create a method instance.
        HeadMethod headMethod = new HeadMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        method = headMethod;
    } else if (hsr.getMethod().equals(METHOD_PUT)) {
        method = new PutMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
    } else
        throw new java.lang.UnsupportedOperationException("Unknown method : " + hsr.getMethod());

    // copy incoming http headers to reverse proxy request
    Enumeration hne = hsr.getHeaderNames();
    while (hne.hasMoreElements()) {
        String hn = (String) hne.nextElement();

        // Map the received host header to the target host name
        // so that the configured virtual domain can
        // do the proper handling.
        if (hn.equalsIgnoreCase("host")) {
            method.addRequestHeader("Host", proxyForwardHost);
            continue;
        }

        Enumeration hvals = hsr.getHeaders(hn);
        while (hvals.hasMoreElements()) {
            String hv = (String) hvals.nextElement();
            method.addRequestHeader(hn, hv);
        }
    }

    // Add Reverse-Proxy-Host header
    String reverseProxyHost = getReverseProxyHost(request);
    method.addRequestHeader(Constants.JOSSO_REVERSE_PROXY_HEADER, reverseProxyHost);

    if (debug >= 1)
        log("Sending " + Constants.JOSSO_REVERSE_PROXY_HEADER + " " + reverseProxyHost);

    // DO NOT follow redirects !
    method.setFollowRedirects(false);

    // By default the httpclient uses HTTP v1.1. We are downgrading it
    // to v1.0 so that the target server doesn't set a reply using chunked
    // transfer encoding which doesn't seem to be handled properly.
    // Check how to make chunked transfer encoding work.
    client.getParams().setVersion(new HttpVersion(1, 0));

    // Execute the method.
    int statusCode = -1;
    try {
        // execute the method.
        statusCode = client.executeMethod(method);
    } catch (HttpRecoverableException e) {
        log("A recoverable exception occurred " + e.getMessage());
    } catch (IOException e) {
        log("Failed to connect.");
        e.printStackTrace();
    }

    // Check that we didn't run out of retries.
    if (statusCode == -1) {
        log("Failed to recover from exception.");
    }

    // Read the response body.
    byte[] responseBody = method.getResponseBody();

    // Release the connection.
    method.releaseConnection();

    HttpServletResponse sres = (HttpServletResponse) response.getResponse();

    // First thing to do is to copy status code to response, otherwise
    // catalina will do it as soon as we set a header or some other part of the response.
    sres.setStatus(method.getStatusCode());

    // copy proxy response headers to client response
    Header[] responseHeaders = method.getResponseHeaders();
    for (int i = 0; i < responseHeaders.length; i++) {
        Header responseHeader = responseHeaders[i];
        String name = responseHeader.getName();
        String value = responseHeader.getValue();

        // Adjust the URL in the Location, Content-Location and URI headers on HTTP redirect responses
        // This is essential to avoid by-passing the reverse proxy because of HTTP redirects on the
        // backend servers which stay behind the reverse proxy
        switch (method.getStatusCode()) {
        case HttpStatus.SC_MOVED_TEMPORARILY:
        case HttpStatus.SC_MOVED_PERMANENTLY:
        case HttpStatus.SC_SEE_OTHER:
        case HttpStatus.SC_TEMPORARY_REDIRECT:

            if ("Location".equalsIgnoreCase(name) || "Content-Location".equalsIgnoreCase(name)
                    || "URI".equalsIgnoreCase(name)) {

                // Check that this redirect must be adjusted.
                if (value.indexOf(proxyForwardHost) >= 0) {
                    String trail = value.substring(proxyForwardHost.length());
                    value = getReverseProxyHost(request) + trail;
                    if (debug >= 1)
                        log("Adjusting redirect header to " + value);
                }
            }
            break;

        } //end of switch
        sres.addHeader(name, value);

    }

    // Sometimes this is null, when no body is returned ...
    if (responseBody != null && responseBody.length > 0)
        sres.getOutputStream().write(responseBody);

    sres.getOutputStream().flush();

    if (debug >= 1)
        log("ReverseProxyValve finished.");

    return;
}

---

From source file:org.josso.tc55.gateway.reverseproxy.ReverseProxyValve.java

/**
 * Intercepts Http request and redirects it to the configured SSO partner application.
 *
 * @param request The servlet request to be processed
 * @param response The servlet response to be created
 *  in the current processing pipeline//from w  ww. j  a  va 2s.  com
 * @exception IOException if an input/output error occurs
 * @exception javax.servlet.ServletException if a servlet error occurs
 */
public void invoke(Request request, Response response) throws IOException, javax.servlet.ServletException {

    if (container.getLogger().isDebugEnabled())
        container.getLogger().debug("ReverseProxyValve Acting.");

    ProxyContextConfig[] contexts = _rpc.getProxyContexts();

    // Create an instance of HttpClient.
    HttpClient client = new HttpClient();

    HttpServletRequest hsr = (HttpServletRequest) request.getRequest();
    String uri = hsr.getRequestURI();

    String uriContext = null;

    StringTokenizer st = new StringTokenizer(uri.substring(1), "/");
    while (st.hasMoreTokens()) {
        String token = st.nextToken();
        uriContext = "/" + token;
        break;
    }

    if (uriContext == null)
        uriContext = uri;

    // Obtain the target host from the
    String proxyForwardHost = null;
    String proxyForwardUri = null;

    for (int i = 0; i < contexts.length; i++) {
        if (contexts[i].getContext().equals(uriContext)) {
            log("Proxy context mapped to host/uri: " + contexts[i].getForwardHost()
                    + contexts[i].getForwardUri());
            proxyForwardHost = contexts[i].getForwardHost();
            proxyForwardUri = contexts[i].getForwardUri();
            break;
        }
    }

    if (proxyForwardHost == null) {
        log("URI '" + uri + "' can't be mapped to host");
        getNext().invoke(request, response);
        return;
    }

    if (proxyForwardUri == null) {
        // trim the uri context before submitting the http request
        int uriTrailStartPos = uri.substring(1).indexOf("/") + 1;
        proxyForwardUri = uri.substring(uriTrailStartPos);
    } else {
        int uriTrailStartPos = uri.substring(1).indexOf("/") + 1;
        proxyForwardUri = proxyForwardUri + uri.substring(uriTrailStartPos);
    }

    // log ("Proxy request mapped to " + "http://" + proxyForwardHost + proxyForwardUri);

    HttpMethod method;

    // to be moved to a builder which instantiates and build concrete methods.
    if (hsr.getMethod().equals(METHOD_GET)) {
        // Create a method instance.
        HttpMethod getMethod = new GetMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        method = getMethod;
    } else if (hsr.getMethod().equals(METHOD_POST)) {
        // Create a method instance.
        PostMethod postMethod = new PostMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        postMethod.setRequestBody(hsr.getInputStream());
        method = postMethod;
    } else if (hsr.getMethod().equals(METHOD_HEAD)) {
        // Create a method instance.
        HeadMethod headMethod = new HeadMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        method = headMethod;
    } else if (hsr.getMethod().equals(METHOD_PUT)) {
        method = new PutMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
    } else
        throw new java.lang.UnsupportedOperationException("Unknown method : " + hsr.getMethod());

    // copy incoming http headers to reverse proxy request
    Enumeration hne = hsr.getHeaderNames();
    while (hne.hasMoreElements()) {
        String hn = (String) hne.nextElement();

        // Map the received host header to the target host name
        // so that the configured virtual domain can
        // do the proper handling.
        if (hn.equalsIgnoreCase("host")) {
            method.addRequestHeader("Host", proxyForwardHost);
            continue;
        }

        Enumeration hvals = hsr.getHeaders(hn);
        while (hvals.hasMoreElements()) {
            String hv = (String) hvals.nextElement();
            method.addRequestHeader(hn, hv);
        }
    }

    // Add Reverse-Proxy-Host header
    String reverseProxyHost = getReverseProxyHost(request);
    method.addRequestHeader(Constants.JOSSO_REVERSE_PROXY_HEADER, reverseProxyHost);

    if (container.getLogger().isDebugEnabled())
        container.getLogger().debug("Sending " + Constants.JOSSO_REVERSE_PROXY_HEADER + " " + reverseProxyHost);

    // DO NOT follow redirects !
    method.setFollowRedirects(false);

    // By default the httpclient uses HTTP v1.1. We are downgrading it
    // to v1.0 so that the target server doesn't set a reply using chunked
    // transfer encoding which doesn't seem to be handled properly.
    // Check how to make chunked transfer encoding work.
    client.getParams().setVersion(new HttpVersion(1, 0));

    // Execute the method.
    int statusCode = -1;
    try {
        // execute the method.
        statusCode = client.executeMethod(method);
    } catch (HttpRecoverableException e) {
        log("A recoverable exception occurred " + e.getMessage());
    } catch (IOException e) {
        log("Failed to connect.");
        e.printStackTrace();
    }

    // Check that we didn't run out of retries.
    if (statusCode == -1) {
        log("Failed to recover from exception.");
    }

    // Read the response body.
    byte[] responseBody = method.getResponseBody();

    // Release the connection.
    method.releaseConnection();

    HttpServletResponse sres = (HttpServletResponse) response.getResponse();

    // First thing to do is to copy status code to response, otherwise
    // catalina will do it as soon as we set a header or some other part of the response.
    sres.setStatus(method.getStatusCode());

    // copy proxy response headers to client response
    Header[] responseHeaders = method.getResponseHeaders();
    for (int i = 0; i < responseHeaders.length; i++) {
        Header responseHeader = responseHeaders[i];
        String name = responseHeader.getName();
        String value = responseHeader.getValue();

        // Adjust the URL in the Location, Content-Location and URI headers on HTTP redirect responses
        // This is essential to avoid by-passing the reverse proxy because of HTTP redirects on the
        // backend servers which stay behind the reverse proxy
        switch (method.getStatusCode()) {
        case HttpStatus.SC_MOVED_TEMPORARILY:
        case HttpStatus.SC_MOVED_PERMANENTLY:
        case HttpStatus.SC_SEE_OTHER:
        case HttpStatus.SC_TEMPORARY_REDIRECT:

            if ("Location".equalsIgnoreCase(name) || "Content-Location".equalsIgnoreCase(name)
                    || "URI".equalsIgnoreCase(name)) {

                // Check that this redirect must be adjusted.
                if (value.indexOf(proxyForwardHost) >= 0) {
                    String trail = value.substring(proxyForwardHost.length());
                    value = getReverseProxyHost(request) + trail;
                    if (container.getLogger().isDebugEnabled())
                        container.getLogger().debug("Adjusting redirect header to " + value);
                }
            }
            break;

        } //end of switch
        sres.addHeader(name, value);

    }

    // Sometimes this is null, when no body is returned ...
    if (responseBody != null && responseBody.length > 0)
        sres.getOutputStream().write(responseBody);

    sres.getOutputStream().flush();

    if (container.getLogger().isDebugEnabled())
        container.getLogger().debug("ReverseProxyValve finished.");

    return;
}

---

From source file:org.josso.tc60.gateway.reverseproxy.ReverseProxyValve.java

/**
 * Intercepts Http request and redirects it to the configured SSO partner application.
 *
 * @param request The servlet request to be processed
 * @param response The servlet response to be created
 *  in the current processing pipeline/*from  ww  w . j  av a 2  s . co  m*/
 * @exception IOException if an input/output error occurs
 * @exception javax.servlet.ServletException if a servlet error occurs
 */
public void invoke(Request request, Response response) throws IOException, javax.servlet.ServletException {

    if (container.getLogger().isDebugEnabled())
        container.getLogger().debug("ReverseProxyValve Acting.");

    ProxyContextConfig[] contexts = _rpc.getProxyContexts();

    // Create an instance of HttpClient.
    HttpClient client = new HttpClient();

    HttpServletRequest hsr = (HttpServletRequest) request.getRequest();
    String uri = hsr.getRequestURI();

    String uriContext = null;

    StringTokenizer st = new StringTokenizer(uri.substring(1), "/");
    while (st.hasMoreTokens()) {
        String token = st.nextToken();
        uriContext = "/" + token;
        break;
    }

    if (uriContext == null)
        uriContext = uri;

    // Obtain the target host from the
    String proxyForwardHost = null;
    String proxyForwardUri = null;

    for (int i = 0; i < contexts.length; i++) {
        if (contexts[i].getContext().equals(uriContext)) {
            log("Proxy context mapped to host/uri: " + contexts[i].getForwardHost()
                    + contexts[i].getForwardUri());
            proxyForwardHost = contexts[i].getForwardHost();
            proxyForwardUri = contexts[i].getForwardUri();
            break;
        }
    }

    if (proxyForwardHost == null) {
        log("URI '" + uri + "' can't be mapped to host");
        getNext().invoke(request, response);
        return;
    }

    if (proxyForwardUri == null) {
        // trim the uri context before submitting the http request
        int uriTrailStartPos = uri.substring(1).indexOf("/") + 1;
        proxyForwardUri = uri.substring(uriTrailStartPos);
    } else {
        int uriTrailStartPos = uri.substring(1).indexOf("/") + 1;
        proxyForwardUri = proxyForwardUri + uri.substring(uriTrailStartPos);
    }

    // log ("Proxy request mapped to " + "http://" + proxyForwardHost + proxyForwardUri);

    HttpMethod method;

    // to be moved to a builder which instantiates and build concrete methods.
    if (hsr.getMethod().equals(METHOD_GET)) {
        // Create a method instance.
        HttpMethod getMethod = new GetMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        method = getMethod;
    } else if (hsr.getMethod().equals(METHOD_POST)) {
        // Create a method instance.
        PostMethod postMethod = new PostMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        postMethod.setRequestBody(hsr.getInputStream());
        method = postMethod;
    } else if (hsr.getMethod().equals(METHOD_HEAD)) {
        // Create a method instance.
        HeadMethod headMethod = new HeadMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
        method = headMethod;
    } else if (hsr.getMethod().equals(METHOD_PUT)) {
        method = new PutMethod(proxyForwardHost + proxyForwardUri
                + (hsr.getQueryString() != null ? ("?" + hsr.getQueryString()) : ""));
    } else
        throw new java.lang.UnsupportedOperationException("Unknown method : " + hsr.getMethod());

    // copy incoming http headers to reverse proxy request
    Enumeration hne = hsr.getHeaderNames();
    while (hne.hasMoreElements()) {
        String hn = (String) hne.nextElement();

        // Map the received host header to the target host name
        // so that the configured virtual domain can
        // do the proper handling.
        if (hn.equalsIgnoreCase("host")) {
            method.addRequestHeader("Host", proxyForwardHost);
            continue;
        }

        Enumeration hvals = hsr.getHeaders(hn);
        while (hvals.hasMoreElements()) {
            String hv = (String) hvals.nextElement();
            method.addRequestHeader(hn, hv);
        }
    }

    // Add Reverse-Proxy-Host header
    String reverseProxyHost = getReverseProxyHost(request);
    method.addRequestHeader(Constants.JOSSO_REVERSE_PROXY_HEADER, reverseProxyHost);

    if (container.getLogger().isDebugEnabled())
        container.getLogger().debug("Sending " + Constants.JOSSO_REVERSE_PROXY_HEADER + " " + reverseProxyHost);

    // DO NOT follow redirects !
    method.setFollowRedirects(false);

    // By default the httpclient uses HTTP v1.1. We are downgrading it
    // to v1.0 so that the target server doesn't set a reply using chunked
    // transfer encoding which doesn't seem to be handled properly.
    client.getParams().setVersion(new HttpVersion(1, 0));

    // Execute the method.
    int statusCode = -1;
    try {
        // execute the method.
        statusCode = client.executeMethod(method);
    } catch (HttpRecoverableException e) {
        log("A recoverable exception occurred " + e.getMessage());
    } catch (IOException e) {
        log("Failed to connect.");
        e.printStackTrace();
    }

    // Check that we didn't run out of retries.
    if (statusCode == -1) {
        log("Failed to recover from exception.");
    }

    // Read the response body.
    byte[] responseBody = method.getResponseBody();

    // Release the connection.
    method.releaseConnection();

    HttpServletResponse sres = (HttpServletResponse) response.getResponse();

    // First thing to do is to copy status code to response, otherwise
    // catalina will do it as soon as we set a header or some other part of the response.
    sres.setStatus(method.getStatusCode());

    // copy proxy response headers to client response
    Header[] responseHeaders = method.getResponseHeaders();
    for (int i = 0; i < responseHeaders.length; i++) {
        Header responseHeader = responseHeaders[i];
        String name = responseHeader.getName();
        String value = responseHeader.getValue();

        // Adjust the URL in the Location, Content-Location and URI headers on HTTP redirect responses
        // This is essential to avoid by-passing the reverse proxy because of HTTP redirects on the
        // backend servers which stay behind the reverse proxy
        switch (method.getStatusCode()) {
        case HttpStatus.SC_MOVED_TEMPORARILY:
        case HttpStatus.SC_MOVED_PERMANENTLY:
        case HttpStatus.SC_SEE_OTHER:
        case HttpStatus.SC_TEMPORARY_REDIRECT:

            if ("Location".equalsIgnoreCase(name) || "Content-Location".equalsIgnoreCase(name)
                    || "URI".equalsIgnoreCase(name)) {

                // Check that this redirect must be adjusted.
                if (value.indexOf(proxyForwardHost) >= 0) {
                    String trail = value.substring(proxyForwardHost.length());
                    value = getReverseProxyHost(request) + trail;
                    if (container.getLogger().isDebugEnabled())
                        container.getLogger().debug("Adjusting redirect header to " + value);
                }
            }
            break;

        } //end of switch
        sres.addHeader(name, value);

    }

    // Sometimes this is null, when no body is returned ...
    if (responseBody != null && responseBody.length > 0)
        sres.getOutputStream().write(responseBody);

    sres.getOutputStream().flush();

    if (container.getLogger().isDebugEnabled())
        container.getLogger().debug("ReverseProxyValve finished.");

    return;
}

---

From source file:org.ktunaxa.referral.server.mvc.ProxyController.java

@SuppressWarnings("unchecked")
@RequestMapping(value = "/proxy")
public final void proxyAjaxCall(@RequestParam(required = true, value = "url") String url,
        HttpServletRequest request, HttpServletResponse response) throws IOException {

    // URL needs to be url decoded
    url = URLDecoder.decode(url, "utf-8");

    HttpClient client = new HttpClient();
    try {//from w ww .  ja  va  2 s .co  m

        HttpMethod method = null;

        // Split this according to the type of request
        if ("GET".equals(request.getMethod())) {

            method = new GetMethod(url);
            NameValuePair[] pairs = new NameValuePair[request.getParameterMap().size()];
            int i = 0;
            for (Object name : request.getParameterMap().keySet()) {
                pairs[i++] = new NameValuePair((String) name, request.getParameter((String) name));
            }
            method.setQueryString(pairs);

        } else if ("POST".equals(request.getMethod())) {

            method = new PostMethod(url);

            // Set any eventual parameters that came with our original
            // request (POST params, for instance)
            Enumeration paramNames = request.getParameterNames();
            while (paramNames.hasMoreElements()) {

                String paramName = (String) paramNames.nextElement();
                ((PostMethod) method).setParameter(paramName, request.getParameter(paramName));
            }

        } else {

            throw new NotImplementedException("This proxy only supports GET and POST methods.");
        }

        // Execute the method
        client.executeMethod(method);

        // Set the content type, as it comes from the server
        Header[] headers = method.getResponseHeaders();
        for (Header header : headers) {

            if (header.getName().equalsIgnoreCase("Content-Type")) {

                response.setContentType(header.getValue());
            }
        }

        // Write the body, flush and close
        response.getOutputStream().write(method.getResponseBody());

    } catch (HttpException e) {

        // log.error("Oops, something went wrong in the HTTP proxy", null, e);
        response.getOutputStream().write(e.toString().getBytes("UTF-8"));
        throw e;

    } catch (IOException e) {

        e.printStackTrace();
        response.getOutputStream().write(e.toString().getBytes("UTF-8"));
        throw e;
    }
}

---

From source file:org.melati.admin.Admin.java

private String proxy(Melati melati, ServletTemplateContext context) {
    if (melati.getSession().getAttribute("generatedByMelatiClass") == null)
        throw new AnticipatedException("Only available from within an Admin generated page");
    String method = melati.getRequest().getMethod();
    String url = melati.getRequest().getQueryString();
    HttpServletResponse response = melati.getResponse();
    HttpMethod httpMethod = null;
    try {//from   w  ww  .j  a v  a  2s .  c o  m

        HttpClient client = new HttpClient();
        if (method.equals("GET"))
            httpMethod = new GetMethod(url);
        else if (method.equals("POST"))
            httpMethod = new PostMethod(url);
        else if (method.equals("PUT"))
            httpMethod = new PutMethod(url);
        else if (method.equals("HEAD"))
            httpMethod = new HeadMethod(url);
        else
            throw new RuntimeException("Unexpected method '" + method + "'");
        try {
            httpMethod.setFollowRedirects(true);
            client.executeMethod(httpMethod);
            for (Header h : httpMethod.getResponseHeaders()) {
                response.setHeader(h.getName(), h.getValue());
            }
            response.setStatus(httpMethod.getStatusCode());
            response.setHeader("Cache-Control", "no-cache");
            byte[] outputBytes = httpMethod.getResponseBody();
            if (outputBytes != null) {
                response.setBufferSize(outputBytes.length);
                response.getWriter().write(new String(outputBytes));
                response.getWriter().flush();
            }
        } catch (Exception e) {
            throw new MelatiIOException(e);
        }
    } finally {
        if (httpMethod != null)
            httpMethod.releaseConnection();
    }
    return null;
}

---

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