Example usage for java.net HttpURLConnection getHeaderFields

Introduction

In this page you can find the example usage for java.net HttpURLConnection getHeaderFields.

Prototype

public Map<String, List<String>> getHeaderFields() 

Source Link

Document

Returns an unmodifiable Map of the header fields.

Usage

From source file:net.solarnetwork.node.setup.web.SolarInHttpProxy.java

/**
 * Proxy an HTTP request to SolarIn and return the result on a given HTTP
 * response.// ww w  .j  av  a2 s  . c o  m
 * 
 * @param request
 *        the request to proxy
 * @param response
 *        the response to return the proxy response to
 * @throws IOException
 *         if an IO error occurs
 */
@RequestMapping(value = { "/api/v1/sec/location", "/api/v1/sec/location/price",
        "/api/v1/sec/location/weather" }, method = RequestMethod.GET)
public void proxy(HttpServletRequest request, HttpServletResponse response) throws IOException {
    String context = request.getContextPath();
    String path = request.getRequestURI();
    if (path.startsWith(context)) {
        path = path.substring(context.length());
    }
    String query = request.getQueryString();
    String url = getIdentityService().getSolarInBaseUrl() + path;
    if (query != null) {
        url += '?' + query;
    }
    String accept = request.getHeader("Accept");
    if (accept == null) {
        accept = ACCEPT_JSON;
    }
    try {
        URLConnection conn = getURLConnection(url, request.getMethod(), accept);
        if (conn instanceof HttpURLConnection) {
            final HttpURLConnection httpConn = (HttpURLConnection) conn;
            for (Map.Entry<String, List<String>> me : httpConn.getHeaderFields().entrySet()) {
                final String headerName = me.getKey();
                if (headerName == null) {
                    continue;
                }
                for (String val : me.getValue()) {
                    response.addHeader(headerName, val);
                }
            }
            final String msg = httpConn.getResponseMessage();
            if (msg != null && !msg.equalsIgnoreCase("OK")) {
                response.sendError(httpConn.getResponseCode(), msg);
            } else {
                response.setStatus(httpConn.getResponseCode());
            }
        }
        FileCopyUtils.copy(conn.getInputStream(), response.getOutputStream());
        response.flushBuffer();
    } catch (IOException e) {
        log.debug("Error proxying SolarIn URL [{}]", url, e);
        response.sendError(502, "Problem communicating with SolarIn: " + e.getMessage());
    }
}

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From source file:org.codehaus.httpcache4j.urlconnection.URLConnectionResponseResolver.java

private Headers getResponseHeaders(HttpURLConnection connection) {
    Headers headers = new Headers();
    Map<String, List<String>> headerFields = connection.getHeaderFields();
    for (Map.Entry<String, List<String>> entry : headerFields.entrySet()) {
        for (String headerValue : entry.getValue()) {
            if (entry.getKey() != null) {
                headers = headers.add(entry.getKey(), headerValue);
            }//from www.  j a v  a2  s  . co m
        }
    }
    return headers;
}

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From source file:org.eclipse.ecf.internal.provider.etcd.protocol.EtcdRequest.java

protected EtcdResponse getResponseOrError(HttpURLConnection conn) throws IOException, JSONException {
    try {//from  w w  w  . j  ava  2  s .co m
        return new EtcdSuccessResponse(readStream(conn.getInputStream()), conn.getHeaderFields());
    } catch (IOException e) {
        return new EtcdErrorResponse(readStream(conn.getErrorStream()), conn.getHeaderFields());
    }
}

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From source file:org.apache.falcon.regression.ProcessLibPathLoadTest.java

/**
 * Function to download jar at remote public location.
 * @param urlString public location from where jar is to be downloaded
 * filename is the location where the jar is to be saved
 * @throws Exception/*from w w  w. j  a v  a 2s .c om*/
 */
private void saveUrlToFile(String urlString) throws IOException {

    URL url = new URL(urlString);
    String link;
    HttpURLConnection http = (HttpURLConnection) url.openConnection();
    Map<String, List<String>> header = http.getHeaderFields();
    while (isRedirected(header)) {
        link = header.get("Location").get(0);
        url = new URL(link);
        http = (HttpURLConnection) url.openConnection();
        header = http.getHeaderFields();
    }

    InputStream input = http.getInputStream();
    byte[] buffer = new byte[4096];
    int n;
    OutputStream output = new FileOutputStream(new File(filename));
    while ((n = input.read(buffer)) != -1) {
        output.write(buffer, 0, n);
    }
    output.close();
}

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From source file:com.github.reverseproxy.ReverseProxyJettyHandler.java

private void writeResponse(URLConnection urlConn, HttpServletResponse response) throws IOException {
    HttpURLConnection urlConnection = (HttpURLConnection) urlConn;

    Map<String, List<String>> headers = urlConnection.getHeaderFields();
    for (String headerKey : headers.keySet()) {
        if (!StringUtils.isEmpty(headerKey)) {
            response.setHeader(headerKey, StringUtils.join(headers.get(headerKey), ","));
        }//from  www  .java2  s .  c om
    }

    int responseCode = urlConnection.getResponseCode();

    InputStream inputStream;
    if (responseCode >= 400) {
        inputStream = urlConnection.getErrorStream();
    } else {
        inputStream = urlConnection.getInputStream();
    }
    response.setStatus(responseCode);

    IOUtils.copy(inputStream, response.getOutputStream());
    IOUtils.closeQuietly(inputStream);
}

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From source file:at.florian_lentsch.expirysync.net.JsonCaller.java

private void storeCookies(HttpURLConnection connection) {
    Map<String, List<String>> headerFields = connection.getHeaderFields();
    if (headerFields == null) //for example happends when the server returns <forbidden>
        return;//from   ww w. j  a v  a2s . c o m

    List<String> cookiesHeader = headerFields.get("Set-Cookie");

    if (cookiesHeader != null) {
        for (String cookie : cookiesHeader) {
            this.cookieManager.getCookieStore().add(this.host, HttpCookie.parse(cookie).get(0));
        }
    }
}

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From source file:at.florian_lentsch.expirysync.net.JsonCaller.java

private void determineTimeSkew(HttpURLConnection connection) {
    Map<String, List<String>> headerFields = connection.getHeaderFields();
    if (headerFields == null) //for example happends when the server returns <forbidden>
        return;//from ww  w  . j  a  va2  s  .  c o m

    List<String> dateHeader = headerFields.get("Date");

    if (dateHeader != null && dateHeader.size() > 0) {
        SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z", Locale.US);
        Date date;
        try {
            date = format.parse(dateHeader.get(0));
        } catch (ParseException e) {
            return; // ignore invalid http return header
        }
        JsonCaller.timeSkew = date.getTime() - System.currentTimeMillis();
    }
}

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From source file:com.aperlambda.apercommon.connection.http.HttpRequestSender.java

private HttpResponse send(HttpURLConnection connection) throws IOException {
    connection.connect();/*  w  ww  .ja  v a 2  s . c o  m*/

    if (connection.getResponseCode() != 200)
        return new HttpResponse(connection.getResponseCode());

    Map<String, String> headers = new HashMap<>();
    connection.getHeaderFields().forEach((key, value) -> headers.put(key, value.get(0)));

    String body;
    InputStream iStream = null;
    try {
        iStream = connection.getInputStream();

        String encoding = connection.getContentEncoding();
        encoding = encoding == null ? "UTF-8" : encoding;

        body = IOUtils.toString(iStream, encoding);
    } finally {
        if (iStream != null) {
            iStream.close();
        }
    }

    if (body == null) {
        throw new IOException("Unparseable response body! \n {" + body + "}");
    }

    return new HttpResponse(connection.getResponseCode(), headers, body);
}

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From source file:io.apiman.manager.ui.server.servlets.UrlFetchProxyServlet.java

/**
 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
 *//*from www . j a  v  a2s . c o m*/
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    String url = req.getHeader("X-Apiman-Url"); //$NON-NLS-1$
    if (url == null) {
        resp.sendError(500, "No URL specified in X-Apiman-Url"); //$NON-NLS-1$
        return;
    }

    URL remoteUrl = new URL(url);
    HttpURLConnection remoteConn = (HttpURLConnection) remoteUrl.openConnection();
    InputStream remoteIS = null;
    OutputStream responseOS = null;
    try {
        remoteConn.connect();
        Map<String, List<String>> headerFields = remoteConn.getHeaderFields();
        for (String headerName : headerFields.keySet()) {
            if (headerName == null) {
                continue;
            }
            if (EXCLUDE_HEADERS.contains(headerName)) {
                continue;
            }
            String headerValue = remoteConn.getHeaderField(headerName);
            resp.setHeader(headerName, headerValue);
        }
        resp.setHeader("Cache-control", "no-cache, no-store, must-revalidate"); //$NON-NLS-1$ //$NON-NLS-2$
        remoteIS = remoteConn.getInputStream();
        responseOS = resp.getOutputStream();
        IOUtils.copy(remoteIS, responseOS);
        resp.flushBuffer();
    } catch (Exception e) {
        resp.sendError(500, e.getMessage());
    } finally {
        IOUtils.closeQuietly(responseOS);
        IOUtils.closeQuietly(remoteIS);
    }
}

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From source file:com.truebanana.http.HTTPResponse.java

protected static HTTPResponse from(HTTPRequest request, HttpURLConnection connection, InputStream content) {
    HTTPResponse response = new HTTPResponse();

    response.originalRequest = request;//from  ww w  .ja  va 2 s .c  o  m
    if (content != null) {
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            byte[] data = new byte[16384];
            int nRead;

            while ((nRead = content.read(data, 0, data.length)) != -1) {
                buffer.write(data, 0, nRead);
            }
            buffer.flush();
            response.content = buffer.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    try {
        response.statusCode = connection.getResponseCode();
    } catch (IOException e) {
    }

    String message = null;
    try {
        message = connection.getResponseMessage();
    } catch (IOException e) {
        message = e.getLocalizedMessage();
    }
    response.responseMessage = response.statusCode + (message != null ? " " + message : "");

    response.headers = connection.getHeaderFields();

    response.requestURL = connection.getURL().toString();

    return response;
}

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