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:com.baasbox.android.HttpUrlConnectionClient.java

@Override
public HttpResponse execute(HttpRequest request) throws BaasException {
    try {/* ww w .  j  a v a 2  s .  c om*/
        HttpURLConnection connection = openConnection(request.url);

        for (String name : request.headers.keySet()) {
            connection.addRequestProperty(name, request.headers.get(name));
        }
        setupConnectionForRequest(connection, request);
        connection.connect();

        int responseCode = -1;
        try {
            responseCode = connection.getResponseCode();
        } catch (IOException e) {
            responseCode = connection.getResponseCode();
        }
        Logger.info("Connection response received");
        if (responseCode == -1) {
            throw new IOException("Connection failed");
        }
        StatusLine line = new BasicStatusLine(new ProtocolVersion("HTTP", 1, 1), responseCode,
                connection.getResponseMessage());
        BasicHttpResponse response = new BasicHttpResponse(line);
        response.setEntity(asEntity(connection));
        for (Map.Entry<String, List<String>> header : connection.getHeaderFields().entrySet()) {
            if (header.getKey() != null) {
                Header h = new BasicHeader(header.getKey(), header.getValue().get(0));
                response.addHeader(h);
            }
        }
        return response;
    } catch (IOException e) {
        throw new BaasIOException(e);
    }
}

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From source file:org.broad.igv.util.HttpUtils.java

private void logHeaders(HttpURLConnection conn) {
    Map<String, List<String>> headerFields = conn.getHeaderFields();
    log.debug("Headers for " + conn.getURL());
    for (Map.Entry<String, List<String>> header : headerFields.entrySet()) {
        log.debug(header.getKey() + ": " + org.apache.commons.lang.StringUtils.join(header.getValue(), ','));
    }//www. j a v a  2 s .c  o m
}

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From source file:com.vincestyling.netroid.stack.HurlStack.java

@Override
public HttpResponse performRequest(Request<?> request) throws IOException, AuthFailureError {
    HashMap<String, String> map = new HashMap<String, String>();
    if (!TextUtils.isEmpty(mUserAgent)) {
        map.put(HTTP.USER_AGENT, mUserAgent);
    }//from  w  ww .  j  a v a  2  s. c o m
    map.putAll(request.getHeaders());

    URL parsedUrl = new URL(request.getUrl());
    HttpURLConnection connection = openConnection(parsedUrl, request);
    for (String headerName : map.keySet()) {
        connection.addRequestProperty(headerName, map.get(headerName));
    }

    setConnectionParametersForRequest(connection, request);

    int responseCode = connection.getResponseCode();
    if (responseCode == -1) {
        // -1 is returned by getResponseCode() if the response code could not be retrieved.
        // Signal to the caller that something was wrong with the connection.
        throw new IOException("Could not retrieve response code from HttpUrlConnection.");
    }

    StatusLine responseStatus = new BasicStatusLine(new ProtocolVersion("HTTP", 1, 1),
            connection.getResponseCode(), connection.getResponseMessage());
    BasicHttpResponse response = new BasicHttpResponse(responseStatus);
    if (hasResponseBody(request.getMethod(), responseStatus.getStatusCode())) {
        response.setEntity(entityFromConnection(connection));
    }

    for (Entry<String, List<String>> header : connection.getHeaderFields().entrySet()) {
        if (header.getKey() != null) {
            Header h = new BasicHeader(header.getKey(), header.getValue().get(0));
            response.addHeader(h);
        }
    }

    return response;
}

---

From source file:org.apache.slider.core.restclient.UrlConnectionOperations.java

public HttpOperationResponse execHttpOperation(HttpVerb verb, URL url, byte[] payload, String contentType)
        throws IOException, AuthenticationException {
    HttpURLConnection conn = null;
    HttpOperationResponse outcome = new HttpOperationResponse();
    int resultCode;
    byte[] body = null;
    log.debug("{} {} spnego={}", verb, url, useSpnego);

    boolean doOutput = verb.hasUploadBody();
    if (doOutput) {
        Preconditions.checkArgument(payload != null, "Null payload on a verb which expects one");
    }//from  ww w. j  ava2s  . c  o  m
    try {
        conn = openConnection(url);
        conn.setRequestMethod(verb.getVerb());
        conn.setDoOutput(doOutput);
        if (doOutput) {
            conn.setRequestProperty("Content-Type", contentType);
        }

        // now do the connection
        conn.connect();

        if (doOutput) {
            OutputStream output = conn.getOutputStream();
            IOUtils.write(payload, output);
            output.close();
        }

        resultCode = conn.getResponseCode();
        outcome.lastModified = conn.getLastModified();
        outcome.contentType = conn.getContentType();
        outcome.headers = conn.getHeaderFields();
        InputStream stream = conn.getErrorStream();
        if (stream == null) {
            stream = conn.getInputStream();
        }
        if (stream != null) {
            // read into a buffer.
            body = IOUtils.toByteArray(stream);
        } else {
            // no body: 
            log.debug("No body in response");

        }
    } catch (SSLException e) {
        throw e;
    } catch (IOException e) {
        throw NetUtils.wrapException(url.toString(), url.getPort(), "localhost", 0, e);

    } catch (AuthenticationException e) {
        throw new AuthenticationException("From " + url + ": " + e, e);

    } finally {
        if (conn != null) {
            conn.disconnect();
        }
    }
    uprateFaults(HttpVerb.GET, url.toString(), resultCode, "", body);
    outcome.responseCode = resultCode;
    outcome.data = body;
    return outcome;
}

---

From source file:org.overlord.gadgets.web.server.servlets.RestProxyServlet.java

/**
 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
 *///from w  w  w.j  av a  2 s  .  c o  m
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    System.out.println("Proxy inbound endpoint: " + req.getRequestURI());
    // Connect to proxy URL.
    String urlStr = getProxyUrl(req);
    String queryString = req.getQueryString();
    if (queryString != null) {
        urlStr = urlStr + "?" + queryString;
    }
    System.out.println("Proxying to: " + urlStr);
    URL url = new URL(urlStr);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("GET");

    // Proxy all of the request headers.
    Enumeration<?> headerNames = req.getHeaderNames();
    while (headerNames.hasMoreElements()) {
        String headerName = String.valueOf(headerNames.nextElement());
        Enumeration<?> headerValues = req.getHeaders(headerName);
        while (headerValues.hasMoreElements()) {
            String headerValue = String.valueOf(headerValues.nextElement());
            conn.addRequestProperty(headerName, headerValue);
        }
    }

    // Handle authentication
    RestProxyAuthProvider authProvider = getAuthProvider();
    if (authProvider != null) {
        authProvider.provideAuthentication(conn);
    }

    // Now connect and proxy the response.
    InputStream proxyUrlResponseStream = null;
    try {
        proxyUrlResponseStream = conn.getInputStream();
        resp.setStatus(conn.getResponseCode());
        // Proxy the response headers
        for (Entry<String, List<String>> entry : conn.getHeaderFields().entrySet()) {
            String respHeaderName = entry.getKey();
            if (respHeaderName != null && !respHeaderName.equalsIgnoreCase("transfer-encoding")) {
                for (String respHeaderValue : entry.getValue()) {
                    resp.addHeader(respHeaderName, respHeaderValue);
                }
            }
        }

        // Proxy the response body.
        IOUtils.copy(proxyUrlResponseStream, resp.getOutputStream());
    } finally {
        IOUtils.closeQuietly(proxyUrlResponseStream);
        conn.disconnect();
    }
}

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From source file:uk.ac.gate.cloud.client.RestClient.java

/**
 * Read an error response from the given connection and throw a
 * suitable {@link RestClientException}. This method always throws an
 * exception, it will never return normally.
 */// ww  w . j  a  va 2 s  .c om
private void readError(HttpURLConnection connection) throws RestClientException {
    InputStream stream;
    try {
        String encoding = connection.getContentEncoding();
        if ("gzip".equalsIgnoreCase(encoding)) {
            stream = new GZIPInputStream(connection.getErrorStream());
        } else {
            stream = connection.getErrorStream();
        }

        InputStreamReader reader = new InputStreamReader(stream, "UTF-8");

        try {
            JsonNode errorNode = null;
            errorNode = MAPPER.readTree(stream);

            throw new RestClientException("Server returned response code " + connection.getResponseCode(),
                    errorNode, connection.getResponseCode(), connection.getHeaderFields());

        } finally {
            reader.close();
        }
    } catch (RestClientException e2) {
        throw e2;
    } catch (Exception e2) {
        throw new RestClientException("Error communicating with server", e2);
    }
}

---

From source file:com.zjut.material_wecenter.Client.java

/**
 * doPost ??POST/*from   ww  w . j  a v a 2  s  .c  om*/
 * @param URL URL
 * @param params ?
 * @return ?NULL
 */
private String doPost(String URL, Map<String, String> params) {
    // 
    StringBuilder builder = new StringBuilder();
    for (Map.Entry<String, String> entry : params.entrySet()) {
        builder.append(entry.getKey()).append("=").append(URLEncoder.encode(entry.getValue())).append("&");
    }
    builder.deleteCharAt(builder.length() - 1);
    byte[] data = builder.toString().getBytes();
    // ?
    try {
        URL url = new URL(URL);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setConnectTimeout(Config.TIME_OUT);
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setRequestMethod("POST");
        connection.setUseCaches(false);
        // Cookie
        connection.setRequestProperty("Cookie", cooike);
        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        connection.setRequestProperty("Content-Length", String.valueOf(data.length));
        // ??
        OutputStream output = connection.getOutputStream();
        output.write(data);
        // ?
        int response = connection.getResponseCode();
        if (response == HttpURLConnection.HTTP_OK) {
            // ?Cookie
            Map<String, List<String>> header = connection.getHeaderFields();
            List<String> cookies = header.get("Set-Cookie");
            if (cookies.size() == 3)
                cooike = cookies.get(2);
            // ??
            InputStream input = connection.getInputStream();
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            byte[] buffer = new byte[Config.MAX_LINE_BUFFER];
            int len = 0;
            while ((len = input.read(buffer)) != -1)
                byteArrayOutputStream.write(buffer, 0, len);
            return new String(byteArrayOutputStream.toByteArray());
        }
    } catch (IOException e) {
        return null;
    }
    return null;
}

---

From source file:com.ab.network.toolbox.HurlStack.java

@Override
public HttpResponse performRequest(Request<?> request, Map<String, String> additionalHeaders)
        throws IOException, AuthFailureError {
    String url = request.getUrl();
    HashMap<String, String> map = new HashMap<String, String>();
    map.putAll(request.getHeaders());//from   w ww .ja  va 2 s  . com
    map.putAll(additionalHeaders);
    if (mUrlRewriter != null) {
        String rewritten = mUrlRewriter.rewriteUrl(url);
        if (rewritten == null) {
            throw new IOException("URL blocked by rewriter: " + url);
        }
        url = rewritten;
    }
    URL parsedUrl = new URL(url);
    HttpURLConnection connection = openConnection(parsedUrl, request);
    for (String headerName : map.keySet()) {
        connection.addRequestProperty(headerName, map.get(headerName));
    }
    setConnectionParametersForRequest(connection, request);
    // Initialize HttpResponse with data from the HttpURLConnection.
    ProtocolVersion protocolVersion = new ProtocolVersion("HTTP", 1, 1);
    int responseCode = connection.getResponseCode();
    if (responseCode == -1) {
        // -1 is returned by getResponseCode() if the response code could not be retrieved.
        // Signal to the caller that something was wrong with the connection.
        throw new IOException("Could not retrieve response code from HttpUrlConnection.");
    }
    StatusLine responseStatus = new BasicStatusLine(protocolVersion, connection.getResponseCode(),
            connection.getResponseMessage());
    BasicHttpResponse response = new BasicHttpResponse(responseStatus);
    response.setEntity(entityFromConnection(connection));
    for (Entry<String, List<String>> header : connection.getHeaderFields().entrySet()) {
        if (header.getKey() != null) {
            Header h = new BasicHeader(header.getKey(), header.getValue().get(0));
            response.addHeader(h);
        }
    }
    return response;
}

---

From source file:com.zlk.bigdemo.android.volley.toolbox.HurlStack.java

private HttpResponse performNormalREquest(Request<?> request, Map<String, String> additionalHeaders)
        throws IOException, AuthFailureError {
    String url = request.getUrl();
    HashMap<String, String> map = new HashMap<String, String>();
    map.putAll(request.getHeaders());//from  w  ww.  j av  a2s  .c om
    map.putAll(additionalHeaders);
    if (mUrlRewriter != null) {
        String rewritten = mUrlRewriter.rewriteUrl(url);
        if (rewritten == null) {
            throw new IOException("URL blocked by rewriter: " + url);
        }
        url = rewritten;
    }
    URL parsedUrl = new URL(url);
    HttpURLConnection connection = openConnection(parsedUrl, request);
    for (String headerName : map.keySet()) {
        connection.addRequestProperty(headerName, map.get(headerName));
    }
    setConnectionParametersForRequest(connection, request);
    // Initialize HttpResponse with data from the HttpURLConnection.
    ProtocolVersion protocolVersion = new ProtocolVersion("HTTP", 1, 1);
    int responseCode = connection.getResponseCode();
    if (responseCode == -1) {
        // -1 is returned by getResponseCode() if the response code could not be retrieved.
        // Signal to the caller that something was wrong with the connection.
        throw new IOException("Could not retrieve response code from HttpUrlConnection.");
    }
    StatusLine responseStatus = new BasicStatusLine(protocolVersion, connection.getResponseCode(),
            connection.getResponseMessage());
    BasicHttpResponse response = new BasicHttpResponse(responseStatus);
    response.setEntity(entityFromConnection(connection));
    for (Entry<String, List<String>> header : connection.getHeaderFields().entrySet()) {
        if (header.getKey() != null) {
            Header h = new BasicHeader(header.getKey(), header.getValue().get(0));
            response.addHeader(h);
        }
    }
    return response;
}

---

From source file:neal.http.impl.httpstack.HurlStack.java

@Override
public HttpResponse performRequest(Request<?> request, Map<String, String> additionalHeaders)
        throws IOException, HttpErrorCollection.AuthFailureError {
    String url = request.getUrl();
    HashMap<String, String> map = new HashMap<String, String>();
    map.putAll(request.getHeaders());/*  w  w  w  . j  a  v a  2s  . co m*/
    map.putAll(additionalHeaders);
    if (mUrlRewriter != null) {
        String rewritten = mUrlRewriter.rewriteUrl(url);
        if (rewritten == null) {
            throw new IOException("URL blocked by rewriter: " + url);
        }
        url = rewritten;
    }
    URL parsedUrl = new URL(url);
    HttpURLConnection connection = openConnection(parsedUrl, request);
    for (String headerName : map.keySet()) {
        connection.addRequestProperty(headerName, map.get(headerName));
    }
    setConnectionParametersForRequest(connection, request);
    // Initialize HttpResponse with data from the HttpURLConnection.
    ProtocolVersion protocolVersion = new ProtocolVersion("HTTP", 1, 1);
    int responseCode = connection.getResponseCode();
    if (responseCode == -1) {
        // -1 is returned by getResponseCode() if the response code could not be retrieved.
        // Signal to the caller that something was wrong with the connection.
        throw new IOException("Could not retrieve response code from HttpUrlConnection.");
    }
    StatusLine responseStatus = new BasicStatusLine(protocolVersion, connection.getResponseCode(),
            connection.getResponseMessage());
    BasicHttpResponse response = new BasicHttpResponse(responseStatus);
    response.setEntity(entityFromConnection(connection));
    for (Entry<String, List<String>> header : connection.getHeaderFields().entrySet()) {
        if (header.getKey() != null) {
            Header h = new BasicHeader(header.getKey(), header.getValue().get(0));
            response.addHeader(h);
        }
    }
    return response;
}

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