Example usage for org.apache.http.client.utils URIUtils rewriteURI

Introduction

In this page you can find the example usage for org.apache.http.client.utils URIUtils rewriteURI.

Prototype

public static URI rewriteURI(final URI uri, final HttpHost target, final boolean dropFragment)
        throws URISyntaxException 

Source Link

Document

A convenience method for creating a new URI whose scheme, host and port are taken from the target host, but whose path, query and fragment are taken from the existing URI.

Usage

From source file:com.mongolduu.android.ng.misc.RedirectHandler.java

public URI getLocationURI(final HttpResponse response, final HttpContext context) throws ProtocolException {
    if (response == null) {
        throw new IllegalArgumentException("HTTP response may not be null");
    }//ww  w. java2s. c  o m
    // get the location header to find out where to redirect to
    Header locationHeader = response.getFirstHeader("location");
    if (locationHeader == null) {
        // got a redirect response, but no location header
        throw new ProtocolException(
                "Received redirect response " + response.getStatusLine() + " but no location header");
    }
    // HERE IS THE MODIFIED LINE OF CODE
    String location = locationHeader.getValue().replaceAll(" ", "%20");

    URI uri;
    try {
        uri = new URI(location);
    } catch (URISyntaxException ex) {
        throw new ProtocolException("Invalid redirect URI: " + location, ex);
    }

    HttpParams params = response.getParams();
    // rfc2616 demands the location value be a complete URI
    // Location = "Location" ":" absoluteURI
    if (!uri.isAbsolute()) {
        if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
            throw new ProtocolException("Relative redirect location '" + uri + "' not allowed");
        }
        // Adjust location URI
        HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
        if (target == null) {
            throw new IllegalStateException("Target host not available " + "in the HTTP context");
        }

        HttpRequest request = (HttpRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST);

        try {
            URI requestURI = new URI(request.getRequestLine().getUri());
            URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
            uri = URIUtils.resolve(absoluteRequestURI, uri);
        } catch (URISyntaxException ex) {
            throw new ProtocolException(ex.getMessage(), ex);
        }
    }

    if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {

        RedirectLocations redirectLocations = (RedirectLocations) context.getAttribute(REDIRECT_LOCATIONS);

        if (redirectLocations == null) {
            redirectLocations = new RedirectLocations();
            context.setAttribute(REDIRECT_LOCATIONS, redirectLocations);
        }

        URI redirectURI;
        if (uri.getFragment() != null) {
            try {
                HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
                redirectURI = URIUtils.rewriteURI(uri, target, true);
            } catch (URISyntaxException ex) {
                throw new ProtocolException(ex.getMessage(), ex);
            }
        } else {
            redirectURI = uri;
        }

        if (redirectLocations.contains(redirectURI)) {
            throw new CircularRedirectException("Circular redirect to '" + redirectURI + "'");
        } else {
            redirectLocations.add(redirectURI);
        }
    }

    return uri;
}

---

From source file:cn.com.loopj.android.http.MyRedirectHandler.java

@Override
public URI getLocationURI(final HttpResponse response, final HttpContext context) throws ProtocolException {
    if (response == null) {
        throw new IllegalArgumentException("HTTP response may not be null");
    }/*from ww w .  ja  v a 2 s . c o  m*/
    //get the location header to find out where to redirect to
    Header locationHeader = response.getFirstHeader("location");
    if (locationHeader == null) {
        // got a redirect response, but no location header
        throw new ProtocolException(
                "Received redirect response " + response.getStatusLine() + " but no location header");
    }
    //HERE IS THE MODIFIED LINE OF CODE
    String location = locationHeader.getValue().replaceAll(" ", "%20");

    URI uri;
    try {
        uri = new URI(location);
    } catch (URISyntaxException ex) {
        throw new ProtocolException("Invalid redirect URI: " + location, ex);
    }

    HttpParams params = response.getParams();
    // rfc2616 demands the location value be a complete URI
    // Location       = "Location" ":" absoluteURI
    if (!uri.isAbsolute()) {
        if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
            throw new ProtocolException("Relative redirect location '" + uri + "' not allowed");
        }
        // Adjust location URI
        HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
        if (target == null) {
            throw new IllegalStateException("Target host not available " + "in the HTTP context");
        }

        HttpRequest request = (HttpRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST);

        try {
            URI requestURI = new URI(request.getRequestLine().getUri());
            URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
            uri = URIUtils.resolve(absoluteRequestURI, uri);
        } catch (URISyntaxException ex) {
            throw new ProtocolException(ex.getMessage(), ex);
        }
    }

    if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {

        RedirectLocations redirectLocations = (RedirectLocations) context.getAttribute(REDIRECT_LOCATIONS);

        if (redirectLocations == null) {
            redirectLocations = new RedirectLocations();
            context.setAttribute(REDIRECT_LOCATIONS, redirectLocations);
        }

        URI redirectURI;
        if (uri.getFragment() != null) {
            try {
                HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
                redirectURI = URIUtils.rewriteURI(uri, target, true);
            } catch (URISyntaxException ex) {
                throw new ProtocolException(ex.getMessage(), ex);
            }
        } else {
            redirectURI = uri;
        }

        if (redirectLocations.contains(redirectURI)) {
            throw new CircularRedirectException("Circular redirect to '" + redirectURI + "'");
        } else {
            redirectLocations.add(redirectURI);
        }
    }

    return uri;
}

---

From source file:com.amytech.android.library.utils.asynchttp.MyRedirectHandler.java

@Override
public URI getLocationURI(final HttpResponse response, final HttpContext context) throws ProtocolException {
    if (response == null) {
        throw new IllegalArgumentException("HTTP response may not be null");
    }/*from w w  w .  j  ava 2 s. c om*/
    // get the location header to find out where to redirect to
    Header locationHeader = response.getFirstHeader("location");
    if (locationHeader == null) {
        // got a redirect response, but no location header
        throw new ProtocolException(
                "Received redirect response " + response.getStatusLine() + " but no location header");
    }
    // HERE IS THE MODIFIED LINE OF CODE
    String location = locationHeader.getValue().replaceAll(" ", "%20");

    URI uri;
    try {
        uri = new URI(location);
    } catch (URISyntaxException ex) {
        throw new ProtocolException("Invalid redirect URI: " + location, ex);
    }

    HttpParams params = response.getParams();
    // rfc2616 demands the location value be a complete URI
    // Location = "Location" ":" absoluteURI
    if (!uri.isAbsolute()) {
        if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
            throw new ProtocolException("Relative redirect location '" + uri + "' not allowed");
        }
        // Adjust location URI
        HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
        if (target == null) {
            throw new IllegalStateException("Target host not available " + "in the HTTP context");
        }

        HttpRequest request = (HttpRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST);

        try {
            URI requestURI = new URI(request.getRequestLine().getUri());
            URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
            uri = URIUtils.resolve(absoluteRequestURI, uri);
        } catch (URISyntaxException ex) {
            throw new ProtocolException(ex.getMessage(), ex);
        }
    }

    if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {

        RedirectLocations redirectLocations = (RedirectLocations) context.getAttribute(REDIRECT_LOCATIONS);

        if (redirectLocations == null) {
            redirectLocations = new RedirectLocations();
            context.setAttribute(REDIRECT_LOCATIONS, redirectLocations);
        }

        URI redirectURI;
        if (uri.getFragment() != null) {
            try {
                HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
                redirectURI = URIUtils.rewriteURI(uri, target, true);
            } catch (URISyntaxException ex) {
                throw new ProtocolException(ex.getMessage(), ex);
            }
        } else {
            redirectURI = uri;
        }

        if (redirectLocations.contains(redirectURI)) {
            throw new CircularRedirectException("Circular redirect to '" + redirectURI + "'");
        } else {
            redirectLocations.add(redirectURI);
        }
    }

    return uri;
}

---

From source file:clj_httpc.CustomRedirectStrategy.java

public URI getLocationURI(final HttpRequest request, final HttpResponse response, final HttpContext context)
        throws ProtocolException {
    if (response == null) {
        throw new IllegalArgumentException("HTTP response may not be null");
    }//from  w ww  .j  a  v a  2s.  co  m
    //get the location header to find out where to redirect to
    Header locationHeader = response.getFirstHeader("location");
    if (locationHeader == null) {
        // got a redirect response, but no location header
        throw new ProtocolException(
                "Received redirect response " + response.getStatusLine() + " but no location header");
    }
    String location = locationHeader.getValue();
    if (this.log.isDebugEnabled()) {
        this.log.debug("Redirect requested to location '" + location + "'");
    }

    URI uri = createLocationURI(location);

    HttpParams params = response.getParams();
    // rfc2616 demands the location value be a complete URI
    // Location       = "Location" ":" absoluteURI
    if (!uri.isAbsolute()) {
        if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
            throw new ProtocolException("Relative redirect location '" + uri + "' not allowed");
        }
        // Adjust location URI
        HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
        if (target == null) {
            throw new IllegalStateException("Target host not available " + "in the HTTP context");
        }
        try {
            URI requestURI = new URI(request.getRequestLine().getUri());
            URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
            uri = URIUtils.resolve(absoluteRequestURI, uri);
        } catch (URISyntaxException ex) {
            throw new ProtocolException(ex.getMessage(), ex);
        }
    }

    if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {

        CustomRedirectLocations redirectLocations = (CustomRedirectLocations) context
                .getAttribute(REDIRECT_LOCATIONS);

        if (redirectLocations == null) {
            redirectLocations = new CustomRedirectLocations();
            context.setAttribute(REDIRECT_LOCATIONS, redirectLocations);
        }

        URI redirectURI;
        if (uri.getFragment() != null) {
            try {
                HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
                redirectURI = URIUtils.rewriteURI(uri, target, true);
            } catch (URISyntaxException ex) {
                throw new ProtocolException(ex.getMessage(), ex);
            }
        } else {
            redirectURI = uri;
        }

        if (redirectLocations.contains(redirectURI)) {
            throw new CircularRedirectException("Circular redirect to '" + redirectURI + "'");
        } else {
            int statusCode = response.getStatusLine().getStatusCode();
            redirectLocations.add(redirectURI, statusCode);
        }
    }

    return uri;
}

---

From source file:com.bincode.util.DefaultRedirectHandler.java

public URI getLocationURI(final HttpResponse response, final HttpContext context) throws ProtocolException {
    if (response == null) {
        throw new IllegalArgumentException("HTTP response may not be null");
    }//from  w  ww .  j a v a 2  s .co  m
    //get the location header to find out where to redirect to
    Header locationHeader = response.getFirstHeader("location");
    if (locationHeader == null) {
        // got a redirect response, but no location header
        throw new ProtocolException(
                "Received redirect response " + response.getStatusLine() + " but no location header");
    }
    String location = locationHeader.getValue();
    if (this.log.isDebugEnabled()) {
        this.log.debug("Redirect requested to location '" + location + "'");
    }

    URI uri;
    try {
        uri = new URI(location);
    } catch (URISyntaxException ex) {
        throw new ProtocolException("Invalid redirect URI: " + location, ex);
    }

    HttpParams params = response.getParams();
    // rfc2616 demands the location value be a complete URI
    // Location       = "Location" ":" absoluteURI
    if (!uri.isAbsolute()) {
        if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
            throw new ProtocolException("Relative redirect location '" + uri + "' not allowed");
        }
        // Adjust location URI
        HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
        if (target == null) {
            throw new IllegalStateException("Target host not available " + "in the HTTP context");
        }

        HttpRequest request = (HttpRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST);

        try {
            URI requestURI = new URI(request.getRequestLine().getUri());
            URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
            uri = URIUtils.resolve(absoluteRequestURI, uri);
        } catch (URISyntaxException ex) {
            throw new ProtocolException(ex.getMessage(), ex);
        }
    }

    if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {

        RedirectLocations redirectLocations = (RedirectLocations) context.getAttribute(REDIRECT_LOCATIONS);

        if (redirectLocations == null) {
            redirectLocations = new RedirectLocations();
            context.setAttribute(REDIRECT_LOCATIONS, redirectLocations);
        }

        URI redirectURI;
        if (uri.getFragment() != null) {
            try {
                HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
                redirectURI = URIUtils.rewriteURI(uri, target, true);
            } catch (URISyntaxException ex) {
                throw new ProtocolException(ex.getMessage(), ex);
            }
        } else {
            redirectURI = uri;
        }

        if (redirectLocations.contains(redirectURI)) {
            throw new CircularRedirectException("Circular redirect to '" + redirectURI + "'");
        } else {
            redirectLocations.add(redirectURI);
        }
    }

    return uri;
}

---

From source file:spaceRedirectStrategy.java

public URI getLocationURI(final HttpRequest request, final HttpResponse response, final HttpContext context)
        throws ProtocolException {
    if (response == null) {
        throw new IllegalArgumentException("HTTP response may not be null");
    }/*from   w w w .  ja v  a2  s.c  o  m*/
    //get the location header to find out where to redirect to
    Header locationHeader = response.getFirstHeader("location");
    if (locationHeader == null) {
        // got a redirect response, but no location header
        throw new ProtocolException(
                "Received redirect response " + response.getStatusLine() + " but no location header");
    }
    String location = locationHeader.getValue().replaceAll(" ", "%20");
    ;
    if (this.log.isDebugEnabled()) {
        this.log.debug("Redirect requested to location '" + location + "'");
    }

    URI uri = createLocationURI(location);

    HttpParams params = response.getParams();
    // rfc2616 demands the location value be a complete URI
    // Location       = "Location" ":" absoluteURI
    if (!uri.isAbsolute()) {
        if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
            throw new ProtocolException("Relative redirect location '" + uri + "' not allowed");
        }
        // Adjust location URI
        HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
        if (target == null) {
            throw new IllegalStateException("Target host not available " + "in the HTTP context");
        }
        try {
            URI requestURI = new URI(request.getRequestLine().getUri());
            URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
            uri = URIUtils.resolve(absoluteRequestURI, uri);
        } catch (URISyntaxException ex) {
            throw new ProtocolException(ex.getMessage(), ex);
        }
    }

    if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {

        RedirectLocations redirectLocations = (RedirectLocations) context.getAttribute(REDIRECT_LOCATIONS);

        if (redirectLocations == null) {
            redirectLocations = new RedirectLocations();
            context.setAttribute(REDIRECT_LOCATIONS, redirectLocations);
        }

        URI redirectURI;
        if (uri.getFragment() != null) {
            try {
                HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
                redirectURI = URIUtils.rewriteURI(uri, target, true);
            } catch (URISyntaxException ex) {
                throw new ProtocolException(ex.getMessage(), ex);
            }
        } else {
            redirectURI = uri;
        }

        if (redirectLocations.contains(redirectURI)) {
            throw new CircularRedirectException("Circular redirect to '" + redirectURI + "'");
        } else {
            //redirectLocations.add(redirectURI);
        }
    }

    return uri;
}

---

From source file:com.amos.tool.SelfRedirectStrategy.java

public URI getLocationURI(final HttpRequest request, final HttpResponse response, final HttpContext context)
        throws ProtocolException {
    Args.notNull(request, "HTTP request");
    Args.notNull(response, "HTTP response");
    Args.notNull(context, "HTTP context");

    final HttpClientContext clientContext = HttpClientContext.adapt(context);

    //get the location header to find out where to redirect to
    final Header locationHeader = response.getFirstHeader("location");
    if (locationHeader == null) {
        // got a redirect response, but no location header
        throw new ProtocolException(
                "Received redirect response " + response.getStatusLine() + " but no location header");
    }/*from w  ww .  j a v  a 2s .  c  o m*/
    final String location = locationHeader.getValue();
    if (this.log.isDebugEnabled()) {
        this.log.debug("Redirect requested to location '" + location + "'");
    }

    final RequestConfig config = clientContext.getRequestConfig();

    URI uri = createLocationURI(location.replaceAll(" ", "%20"));

    // rfc2616 demands the location value be a complete URI
    // Location       = "Location" ":" absoluteURI
    try {
        if (!uri.isAbsolute()) {
            if (!config.isRelativeRedirectsAllowed()) {
                throw new ProtocolException("Relative redirect location '" + uri + "' not allowed");
            }
            // Adjust location URI
            final HttpHost target = clientContext.getTargetHost();
            Asserts.notNull(target, "Target host");
            final URI requestURI = new URI(request.getRequestLine().getUri());
            final URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, false);
            uri = URIUtils.resolve(absoluteRequestURI, uri);
        }
    } catch (final URISyntaxException ex) {
        throw new ProtocolException(ex.getMessage(), ex);
    }

    RedirectLocations redirectLocations = (RedirectLocations) clientContext
            .getAttribute(HttpClientContext.REDIRECT_LOCATIONS);
    if (redirectLocations == null) {
        redirectLocations = new RedirectLocations();
        context.setAttribute(HttpClientContext.REDIRECT_LOCATIONS, redirectLocations);
    }
    if (!config.isCircularRedirectsAllowed()) {
        if (redirectLocations.contains(uri)) {
            throw new CircularRedirectException("Circular redirect to '" + uri + "'");
        }
    }
    redirectLocations.add(uri);
    return uri;
}

---

From source file:org.apache.synapse.transport.nhttp.Axis2HttpRequest.java

private URI rewriteRequestURI(final URI uri) throws URISyntaxException {
    if (msgContext.isPropertyTrue(NhttpConstants.POST_TO_URI)
            || (route.getProxyHost() != null && !route.isTunnelled())) {
        // Must be absolute
        return uri;
    } else {//from   w  w w .  j  av a2 s.  com
        // Make relative
        return URIUtils.rewriteURI(uri, null, true);
    }
}

---

From source file:czd.lib.network.AsyncHttpClient.java

/**
 * Simple interface method, to enable or disable redirects. If you set manually RedirectHandler
 * on underlying HttpClient, effects of this method will be canceled.
 *
 * @param enableRedirects boolean//from   w ww. ja v a  2  s .  c  om
 */
public void setEnableRedirects(final boolean enableRedirects) {
    if (enableRedirects) {
        httpClient.setRedirectHandler(new DefaultRedirectHandler() {
            @Override
            public boolean isRedirectRequested(HttpResponse response, HttpContext context) {
                if (response == null) {
                    throw new IllegalArgumentException("HTTP response may not be null");
                }
                int statusCode = response.getStatusLine().getStatusCode();
                switch (statusCode) {
                case HttpStatus.SC_MOVED_TEMPORARILY:
                case HttpStatus.SC_MOVED_PERMANENTLY:
                case HttpStatus.SC_SEE_OTHER:
                case HttpStatus.SC_TEMPORARY_REDIRECT:
                    return true;
                default:
                    return false;
                }
            }

            @Override
            public URI getLocationURI(HttpResponse response, HttpContext context) throws ProtocolException {
                if (response == null) {
                    throw new IllegalArgumentException("HTTP response may not be null");
                }
                //get the location header to find out where to redirect to
                Header locationHeader = response.getFirstHeader("location");
                if (locationHeader == null) {
                    // got a redirect response, but no location header
                    throw new ProtocolException("Received redirect response " + response.getStatusLine()
                            + " but no location header");
                }
                //HERE IS THE MODIFIED LINE OF CODE
                String location = locationHeader.getValue().replaceAll(" ", "%20");

                URI uri;
                try {
                    uri = new URI(location);
                } catch (URISyntaxException ex) {
                    throw new ProtocolException("Invalid redirect URI: " + location, ex);
                }

                HttpParams params = response.getParams();
                // rfc2616 demands the location value be a complete URI
                // Location       = "Location" ":" absoluteURI
                if (!uri.isAbsolute()) {
                    if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
                        throw new ProtocolException("Relative redirect location '" + uri + "' not allowed");
                    }
                    // Adjust location URI
                    HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
                    if (target == null) {
                        throw new IllegalStateException("Target host not available " + "in the HTTP context");
                    }

                    HttpRequest request = (HttpRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST);

                    try {
                        URI requestURI = new URI(request.getRequestLine().getUri());
                        URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
                        uri = URIUtils.resolve(absoluteRequestURI, uri);
                    } catch (URISyntaxException ex) {
                        throw new ProtocolException(ex.getMessage(), ex);
                    }
                }

                if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {

                    RedirectLocations redirectLocations = (RedirectLocations) context
                            .getAttribute("http.protocol.redirect-locations");

                    if (redirectLocations == null) {
                        redirectLocations = new RedirectLocations();
                        context.setAttribute("http.protocol.redirect-locations", redirectLocations);
                    }

                    URI redirectURI;
                    if (uri.getFragment() != null) {
                        try {
                            HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
                            redirectURI = URIUtils.rewriteURI(uri, target, true);
                        } catch (URISyntaxException ex) {
                            throw new ProtocolException(ex.getMessage(), ex);
                        }
                    } else {
                        redirectURI = uri;
                    }

                    if (redirectLocations.contains(redirectURI)) {
                        throw new CircularRedirectException("Circular redirect to '" + redirectURI + "'");
                    } else {
                        redirectLocations.add(redirectURI);
                    }
                }

                return uri;
            }
        });
    }

}

---

From source file:com.googlecode.jdeltasync.DeltaSyncClient.java

/**
 * Slightly modified version of {@link DefaultRedirectStrategy#getLocationURI(HttpRequest, HttpResponse, HttpContext)}
 * which also adds the query string from the original request URI to the new URI.
 */// ww w.  j a  v a2s  . c  om
private URI getRedirectLocationURI(IDeltaSyncSession session, HttpUriRequest request, HttpResponse response,
        HttpContext context) throws DeltaSyncException {

    //get the location header to find out where to redirect to
    Header locationHeader = response.getFirstHeader("location");
    if (locationHeader == null) {
        // got a redirect response, but no location header
        throw new DeltaSyncException(
                "Received redirect response " + response.getStatusLine() + " but no location header");
    }
    String location = locationHeader.getValue();
    if (session.getLogger().isDebugEnabled()) {
        session.getLogger().debug("Redirect requested to location '" + location + "'");
    }

    URI uri = null;
    try {
        uri = new URI(location);
        if (request.getURI().getRawQuery() != null) {
            String query = request.getURI().getRawQuery();
            uri = new URI(uri.getScheme(), uri.getUserInfo(), uri.getHost(), uri.getPort(), uri.getPath(),
                    query, uri.getFragment());
        }
    } catch (URISyntaxException ex) {
        throw new DeltaSyncException("Invalid redirect URI: " + location, ex);
    }

    final HttpClientContext clientContext = HttpClientContext.adapt(context);
    final RequestConfig config = clientContext.getRequestConfig();

    // rfc2616 demands the location value be a complete URI
    // Location       = "Location" ":" absoluteURI
    try {
        if (!uri.isAbsolute()) {
            if (config.isRelativeRedirectsAllowed()) {
                throw new DeltaSyncException("Relative redirect location '" + uri + "' not allowed");
            }
            // Adjust location URI
            HttpHost target = clientContext.getTargetHost();
            if (target == null) {
                throw new IllegalStateException("Target host not available " + "in the HTTP context");
            }

            URI requestURI = new URI(request.getRequestLine().getUri());
            URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, false);
            uri = URIUtils.resolve(absoluteRequestURI, uri);
        }
    } catch (URISyntaxException ex) {
        throw new DeltaSyncException(ex.getMessage(), ex);
    }

    RedirectLocations redirectLocations = (RedirectLocations) clientContext
            .getAttribute("http.protocol.redirect-locations");
    if (redirectLocations == null) {
        redirectLocations = new RedirectLocations();
        context.setAttribute("http.protocol.redirect-locations", redirectLocations);
    }

    if (config.isCircularRedirectsAllowed()) {
        URI redirectURI;
        if (uri.getFragment() != null) {
            try {
                HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
                redirectURI = URIUtils.rewriteURI(uri, target, true);
            } catch (URISyntaxException ex) {
                throw new DeltaSyncException(ex.getMessage(), ex);
            }
        } else {
            redirectURI = uri;
        }

        if (redirectLocations.contains(redirectURI)) {
            throw new DeltaSyncException("Circular redirect to '" + redirectURI + "'");
        } else {
            redirectLocations.add(redirectURI);
        }
    }

    return uri;
}

---

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