Example usage for java.net HttpURLConnection setFollowRedirects

List of usage examples for java.net HttpURLConnection setFollowRedirects

  1. HOME
  2. Java
  3. java
  4. java.net.*
  5. HttpURLConnection
  6. setFollowRedirects

Introduction

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

Prototype

public static void setFollowRedirects(boolean set)

Source Link

Document

Sets whether HTTP redirects (requests with response code 3xx) should be automatically followed by this class.

Usage

From source file:carnero.cgeo.cgBase.java

public cgResponse request(boolean secure, String host, String path, String method, String params, int requestId,
        Boolean xContentType) {//from   www  .  j ava2  s . co m
    URL u = null;
    int httpCode = -1;
    String httpMessage = null;
    String httpLocation = null;

    if (requestId == 0) {
        requestId = (int) (Math.random() * 1000);
    }

    if (method == null
            || (method.equalsIgnoreCase("GET") == false && method.equalsIgnoreCase("POST") == false)) {
        method = "POST";
    } else {
        method = method.toUpperCase();
    }

    // https
    String scheme = "http://";
    if (secure) {
        scheme = "https://";
    }

    // prepare cookies
    String cookiesDone = null;
    if (cookies == null || cookies.isEmpty() == true) {
        if (cookies == null) {
            cookies = new HashMap<String, String>();
        }

        final Map<String, ?> prefsAll = prefs.getAll();
        final Set<String> prefsKeys = prefsAll.keySet();

        for (String key : prefsKeys) {
            if (key.matches("cookie_.+") == true) {
                final String cookieKey = key.substring(7);
                final String cookieValue = (String) prefsAll.get(key);

                cookies.put(cookieKey, cookieValue);
            }
        }
    }

    if (cookies != null && !cookies.isEmpty() && cookies.keySet().size() > 0) {
        final Object[] keys = cookies.keySet().toArray();
        final ArrayList<String> cookiesEncoded = new ArrayList<String>();

        for (int i = 0; i < keys.length; i++) {
            String value = cookies.get(keys[i].toString());
            cookiesEncoded.add(keys[i] + "=" + value);
        }

        if (cookiesEncoded.size() > 0) {
            cookiesDone = implode("; ", cookiesEncoded.toArray());
        }
    }

    if (cookiesDone == null) {
        Map<String, ?> prefsValues = prefs.getAll();

        if (prefsValues != null && prefsValues.size() > 0 && prefsValues.keySet().size() > 0) {
            final Object[] keys = prefsValues.keySet().toArray();
            final ArrayList<String> cookiesEncoded = new ArrayList<String>();
            final int length = keys.length;

            for (int i = 0; i < length; i++) {
                if (keys[i].toString().length() > 7
                        && keys[i].toString().substring(0, 7).equals("cookie_") == true) {
                    cookiesEncoded
                            .add(keys[i].toString().substring(7) + "=" + prefsValues.get(keys[i].toString()));
                }
            }

            if (cookiesEncoded.size() > 0) {
                cookiesDone = implode("; ", cookiesEncoded.toArray());
            }
        }
    }

    if (cookiesDone == null) {
        cookiesDone = "";
    }

    URLConnection uc = null;
    HttpURLConnection connection = null;
    Integer timeout = 30000;
    StringBuffer buffer = null;

    for (int i = 0; i < 5; i++) {
        if (i > 0) {
            Log.w(cgSettings.tag, "Failed to download data, retrying. Attempt #" + (i + 1));
        }

        buffer = new StringBuffer();
        timeout = 30000 + (i * 10000);

        try {
            if (method.equals("GET")) {
                // GET
                u = new URL(scheme + host + path + "?" + params);
                uc = u.openConnection();

                uc.setRequestProperty("Host", host);
                uc.setRequestProperty("Cookie", cookiesDone);
                if (xContentType == true) {
                    uc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                }

                if (settings.asBrowser == 1) {
                    uc.setRequestProperty("Accept",
                            "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");
                    // uc.setRequestProperty("Accept-Encoding", "gzip"); // not supported via cellular network
                    uc.setRequestProperty("Accept-Charset", "utf-8, iso-8859-1, utf-16, *;q=0.7");
                    uc.setRequestProperty("Accept-Language", "en-US");
                    uc.setRequestProperty("User-Agent", idBrowser);
                    uc.setRequestProperty("Connection", "keep-alive");
                    uc.setRequestProperty("Keep-Alive", "300");
                }

                connection = (HttpURLConnection) uc;
                connection.setReadTimeout(timeout);
                connection.setRequestMethod(method);
                HttpURLConnection.setFollowRedirects(false);
                connection.setDoInput(true);
                connection.setDoOutput(false);
            } else {
                // POST
                u = new URL(scheme + host + path);
                uc = u.openConnection();

                uc.setRequestProperty("Host", host);
                uc.setRequestProperty("Cookie", cookiesDone);
                if (xContentType == true) {
                    uc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                }

                if (settings.asBrowser == 1) {
                    uc.setRequestProperty("Accept",
                            "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");
                    // uc.setRequestProperty("Accept-Encoding", "gzip"); // not supported via cellular network
                    uc.setRequestProperty("Accept-Charset", "utf-8, iso-8859-1, utf-16, *;q=0.7");
                    uc.setRequestProperty("Accept-Language", "en-US");
                    uc.setRequestProperty("User-Agent", idBrowser);
                    uc.setRequestProperty("Connection", "keep-alive");
                    uc.setRequestProperty("Keep-Alive", "300");
                }

                connection = (HttpURLConnection) uc;
                connection.setReadTimeout(timeout);
                connection.setRequestMethod(method);
                HttpURLConnection.setFollowRedirects(false);
                connection.setDoInput(true);
                connection.setDoOutput(true);

                final OutputStream out = connection.getOutputStream();
                final OutputStreamWriter wr = new OutputStreamWriter(out);
                wr.write(params);
                wr.flush();
                wr.close();
            }

            String headerName = null;
            final SharedPreferences.Editor prefsEditor = prefs.edit();
            for (int j = 1; (headerName = uc.getHeaderFieldKey(j)) != null; j++) {
                if (headerName != null && headerName.equalsIgnoreCase("Set-Cookie")) {
                    int index;
                    String cookie = uc.getHeaderField(j);

                    index = cookie.indexOf(";");
                    if (index > -1) {
                        cookie = cookie.substring(0, cookie.indexOf(";"));
                    }

                    index = cookie.indexOf("=");
                    if (index > -1 && cookie.length() > (index + 1)) {
                        String name = cookie.substring(0, cookie.indexOf("="));
                        String value = cookie.substring(cookie.indexOf("=") + 1, cookie.length());

                        cookies.put(name, value);
                        prefsEditor.putString("cookie_" + name, value);
                    }
                }
            }
            prefsEditor.commit();

            final String encoding = connection.getContentEncoding();
            InputStream ins;

            if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
                ins = new GZIPInputStream(connection.getInputStream());
            } else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
                ins = new InflaterInputStream(connection.getInputStream(), new Inflater(true));
            } else {
                ins = connection.getInputStream();
            }
            final InputStreamReader inr = new InputStreamReader(ins);
            final BufferedReader br = new BufferedReader(inr);

            readIntoBuffer(br, buffer);

            httpCode = connection.getResponseCode();
            httpMessage = connection.getResponseMessage();
            httpLocation = uc.getHeaderField("Location");

            final String paramsLog = params.replaceAll(passMatch, "password=***");
            if (buffer != null && connection != null) {
                Log.i(cgSettings.tag + "|" + requestId,
                        "[" + method + " " + (int) (params.length() / 1024) + "k | " + httpCode + " | "
                                + (int) (buffer.length() / 1024) + "k] Downloaded " + scheme + host + path + "?"
                                + paramsLog);
            } else {
                Log.i(cgSettings.tag + "|" + requestId, "[" + method + " | " + httpCode
                        + "] Failed to download " + scheme + host + path + "?" + paramsLog);
            }

            connection.disconnect();
            br.close();
            ins.close();
            inr.close();
        } catch (IOException e) {
            Log.e(cgSettings.tag, "cgeoBase.request.IOException: " + e.toString());
        } catch (Exception e) {
            Log.e(cgSettings.tag, "cgeoBase.request: " + e.toString());
        }

        if (buffer != null && buffer.length() > 0) {
            break;
        }
    }

    cgResponse response = new cgResponse();
    String data = null;

    try {
        if (httpCode == 302 && httpLocation != null) {
            final Uri newLocation = Uri.parse(httpLocation);
            if (newLocation.isRelative() == true) {
                response = request(secure, host, path, "GET", new HashMap<String, String>(), requestId, false,
                        false, false);
            } else {
                boolean secureRedir = false;
                if (newLocation.getScheme().equals("https")) {
                    secureRedir = true;
                }
                response = request(secureRedir, newLocation.getHost(), newLocation.getPath(), "GET",
                        new HashMap<String, String>(), requestId, false, false, false);
            }
        } else {
            if (buffer != null && buffer.length() > 0) {
                data = replaceWhitespace(buffer);
                buffer = null;

                if (data != null) {
                    response.setData(data);
                } else {
                    response.setData("");
                }
                response.setStatusCode(httpCode);
                response.setStatusMessage(httpMessage);
                response.setUrl(u.toString());
            }
        }
    } catch (Exception e) {
        Log.e(cgSettings.tag, "cgeoBase.page: " + e.toString());
    }

    return response;
}

From source file:carnero.cgeo.original.libs.Base.java

public String requestJSON(String scheme, String host, String path, String method, String params) {
    int httpCode = -1;
    String httpLocation = null;//from w ww. j av a  2s. c o  m

    if (method == null) {
        method = "GET";
    } else {
        method = method.toUpperCase();
    }

    boolean methodPost = false;
    if (method.equalsIgnoreCase("POST")) {
        methodPost = true;
    }

    URLConnection uc = null;
    HttpURLConnection connection = null;
    Integer timeout = 30000;
    final StringBuffer buffer = new StringBuffer();

    for (int i = 0; i < 3; i++) {
        if (i > 0) {
            Log.w(Settings.tag, "Failed to download data, retrying. Attempt #" + (i + 1));
        }

        buffer.delete(0, buffer.length());
        timeout = 30000 + (i * 15000);

        try {
            try {
                URL u = null;
                if (methodPost) {
                    u = new URL(scheme + host + path);
                } else {
                    u = new URL(scheme + host + path + "?" + params);
                }

                if (u.getProtocol().toLowerCase().equals("https")) {
                    trustAllHosts();
                    HttpsURLConnection https = (HttpsURLConnection) u.openConnection();
                    https.setHostnameVerifier(doNotVerify);
                    uc = https;
                } else {
                    uc = (HttpURLConnection) u.openConnection();
                }

                uc.setRequestProperty("Host", host);
                uc.setRequestProperty("Accept", "application/json, text/javascript, */*; q=0.01");
                if (methodPost) {
                    uc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                    uc.setRequestProperty("Content-Length", Integer.toString(params.length()));
                    uc.setRequestProperty("X-HTTP-Method-Override", "GET");
                } else {
                    uc.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
                }
                uc.setRequestProperty("X-Requested-With", "XMLHttpRequest");

                connection = (HttpURLConnection) uc;
                connection.setReadTimeout(timeout);
                connection.setRequestMethod(method);
                HttpURLConnection.setFollowRedirects(false); // TODO: Fix these (FilCab)
                connection.setDoInput(true);
                if (methodPost) {
                    connection.setDoOutput(true);

                    final OutputStream out = connection.getOutputStream();
                    final OutputStreamWriter wr = new OutputStreamWriter(out);
                    wr.write(params);
                    wr.flush();
                    wr.close();
                } else {
                    connection.setDoOutput(false);
                }

                final String encoding = connection.getContentEncoding();
                InputStream ins;

                if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
                    ins = new GZIPInputStream(connection.getInputStream());
                } else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
                    ins = new InflaterInputStream(connection.getInputStream(), new Inflater(true));
                } else {
                    ins = connection.getInputStream();
                }
                final InputStreamReader inr = new InputStreamReader(ins);
                final BufferedReader br = new BufferedReader(inr);

                readIntoBuffer(br, buffer);

                httpCode = connection.getResponseCode();

                final String paramsLog = params.replaceAll(passMatch, "password=***");
                Log.i(Settings.tag + " | JSON",
                        "[POST " + (int) (params.length() / 1024) + "k | " + httpCode + " | "
                                + (int) (buffer.length() / 1024) + "k] Downloaded " + "http://" + host + path
                                + "?" + paramsLog);

                connection.disconnect();
                br.close();
                ins.close();
                inr.close();
            } catch (IOException e) {
                httpCode = connection.getResponseCode();

                Log.e(Settings.tag, "cgeoBase.requestJSON.IOException: " + httpCode + ": "
                        + connection.getResponseMessage() + " ~ " + e.toString());
            }
        } catch (Exception e) {
            Log.e(Settings.tag, "cgeoBase.requestJSON: " + e.toString());
        }

        if (buffer != null && buffer.length() > 0) {
            break;
        }

        if (httpCode == 403) {
            // we're not allowed to download content, so let's move
            break;
        }
    }

    String page = null;
    if (httpCode == 302 && httpLocation != null) {
        final Uri newLocation = Uri.parse(httpLocation);
        if (newLocation.isRelative() == true) {
            page = requestJSONgc(host, path, params);
        } else {
            page = requestJSONgc(newLocation.getHost(), newLocation.getPath(), params);
        }
    } else {
        page = replaceWhitespace(buffer);
    }

    if (page != null) {
        return page;
    } else {
        return "";
    }
}

From source file:carnero.cgeo.cgBase.java

public String requestJSONgc(String host, String path, String params) {
    int httpCode = -1;
    String httpLocation = null;//from  ww  w.j  a  v  a  2 s  .  com

    // prepare cookies
    String cookiesDone = null;
    if (cookies == null || cookies.isEmpty() == true) {
        if (cookies == null) {
            cookies = new HashMap<String, String>();
        }

        final Map<String, ?> prefsAll = prefs.getAll();
        final Set<String> prefsKeys = prefsAll.keySet();

        for (String key : prefsKeys) {
            if (key.matches("cookie_.+") == true) {
                final String cookieKey = key.substring(7);
                final String cookieValue = (String) prefsAll.get(key);

                cookies.put(cookieKey, cookieValue);
            }
        }
    }

    if (cookies != null) {
        final Object[] keys = cookies.keySet().toArray();
        final ArrayList<String> cookiesEncoded = new ArrayList<String>();

        for (int i = 0; i < keys.length; i++) {
            String value = cookies.get(keys[i].toString());
            cookiesEncoded.add(keys[i] + "=" + value);
        }

        if (cookiesEncoded.size() > 0) {
            cookiesDone = implode("; ", cookiesEncoded.toArray());
        }
    }

    if (cookiesDone == null) {
        Map<String, ?> prefsValues = prefs.getAll();

        if (prefsValues != null && prefsValues.size() > 0) {
            final Object[] keys = prefsValues.keySet().toArray();
            final ArrayList<String> cookiesEncoded = new ArrayList<String>();
            final int length = keys.length;

            for (int i = 0; i < length; i++) {
                if (keys[i].toString().length() > 7
                        && keys[i].toString().substring(0, 7).equals("cookie_") == true) {
                    cookiesEncoded
                            .add(keys[i].toString().substring(7) + "=" + prefsValues.get(keys[i].toString()));
                }
            }

            if (cookiesEncoded.size() > 0) {
                cookiesDone = implode("; ", cookiesEncoded.toArray());
            }
        }
    }

    if (cookiesDone == null) {
        cookiesDone = "";
    }

    URLConnection uc = null;
    HttpURLConnection connection = null;
    Integer timeout = 30000;
    final StringBuffer buffer = new StringBuffer();

    for (int i = 0; i < 3; i++) {
        if (i > 0) {
            Log.w(cgSettings.tag, "Failed to download data, retrying. Attempt #" + (i + 1));
        }

        buffer.delete(0, buffer.length());
        timeout = 30000 + (i * 15000);

        try {
            // POST
            final URL u = new URL("http://" + host + path);
            uc = u.openConnection();

            uc.setRequestProperty("Host", host);
            uc.setRequestProperty("Cookie", cookiesDone);
            uc.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
            uc.setRequestProperty("X-Requested-With", "XMLHttpRequest");
            uc.setRequestProperty("Accept", "application/json, text/javascript, */*; q=0.01");
            uc.setRequestProperty("Referer", host + "/" + path);

            if (settings.asBrowser == 1) {
                uc.setRequestProperty("Accept-Charset", "utf-8, iso-8859-1, utf-16, *;q=0.7");
                uc.setRequestProperty("Accept-Language", "en-US");
                uc.setRequestProperty("User-Agent", idBrowser);
                uc.setRequestProperty("Connection", "keep-alive");
                uc.setRequestProperty("Keep-Alive", "300");
            }

            connection = (HttpURLConnection) uc;
            connection.setReadTimeout(timeout);
            connection.setRequestMethod("POST");
            HttpURLConnection.setFollowRedirects(false); // TODO: Fix these (FilCab)
            connection.setDoInput(true);
            connection.setDoOutput(true);

            final OutputStream out = connection.getOutputStream();
            final OutputStreamWriter wr = new OutputStreamWriter(out);
            wr.write(params);
            wr.flush();
            wr.close();

            String headerName = null;
            final SharedPreferences.Editor prefsEditor = prefs.edit();
            for (int j = 1; (headerName = uc.getHeaderFieldKey(j)) != null; j++) {
                if (headerName != null && headerName.equalsIgnoreCase("Set-Cookie")) {
                    int index;
                    String cookie = uc.getHeaderField(j);

                    index = cookie.indexOf(";");
                    if (index > -1) {
                        cookie = cookie.substring(0, cookie.indexOf(";"));
                    }

                    index = cookie.indexOf("=");
                    if (index > -1 && cookie.length() > (index + 1)) {
                        String name = cookie.substring(0, cookie.indexOf("="));
                        String value = cookie.substring(cookie.indexOf("=") + 1, cookie.length());

                        cookies.put(name, value);
                        prefsEditor.putString("cookie_" + name, value);
                    }
                }
            }
            prefsEditor.commit();

            final String encoding = connection.getContentEncoding();
            InputStream ins;

            if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
                ins = new GZIPInputStream(connection.getInputStream());
            } else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
                ins = new InflaterInputStream(connection.getInputStream(), new Inflater(true));
            } else {
                ins = connection.getInputStream();
            }
            final InputStreamReader inr = new InputStreamReader(ins);
            final BufferedReader br = new BufferedReader(inr);

            readIntoBuffer(br, buffer);

            httpCode = connection.getResponseCode();
            httpLocation = uc.getHeaderField("Location");

            final String paramsLog = params.replaceAll(passMatch, "password=***");
            Log.i(cgSettings.tag + " | JSON",
                    "[POST " + (int) (params.length() / 1024) + "k | " + httpCode + " | "
                            + (int) (buffer.length() / 1024) + "k] Downloaded " + "http://" + host + path + "?"
                            + paramsLog);

            connection.disconnect();
            br.close();
            ins.close();
            inr.close();
        } catch (IOException e) {
            Log.e(cgSettings.tag, "cgeoBase.requestJSONgc.IOException: " + e.toString());
        } catch (Exception e) {
            Log.e(cgSettings.tag, "cgeoBase.requestJSONgc: " + e.toString());
        }

        if (buffer != null && buffer.length() > 0) {
            break;
        }
    }

    String page = null;
    if (httpCode == 302 && httpLocation != null) {
        final Uri newLocation = Uri.parse(httpLocation);
        if (newLocation.isRelative() == true) {
            page = requestJSONgc(host, path, params);
        } else {
            page = requestJSONgc(newLocation.getHost(), newLocation.getPath(), params);
        }
    } else {
        page = replaceWhitespace(buffer);
    }

    if (page != null) {
        return page;
    } else {
        return "";
    }
}

From source file:carnero.cgeo.cgBase.java

public String requestJSON(String scheme, String host, String path, String method, String params) {
    int httpCode = -1;
    String httpLocation = null;//from w ww  . j a  v a  2s.  co  m

    if (method == null) {
        method = "GET";
    } else {
        method = method.toUpperCase();
    }

    boolean methodPost = false;
    if (method.equalsIgnoreCase("POST")) {
        methodPost = true;
    }

    URLConnection uc = null;
    HttpURLConnection connection = null;
    Integer timeout = 30000;
    final StringBuffer buffer = new StringBuffer();

    for (int i = 0; i < 3; i++) {
        if (i > 0) {
            Log.w(cgSettings.tag, "Failed to download data, retrying. Attempt #" + (i + 1));
        }

        buffer.delete(0, buffer.length());
        timeout = 30000 + (i * 15000);

        try {
            try {
                URL u = null;
                if (methodPost) {
                    u = new URL(scheme + host + path);
                } else {
                    u = new URL(scheme + host + path + "?" + params);
                }

                if (u.getProtocol().toLowerCase().equals("https")) {
                    trustAllHosts();
                    HttpsURLConnection https = (HttpsURLConnection) u.openConnection();
                    https.setHostnameVerifier(doNotVerify);
                    uc = https;
                } else {
                    uc = (HttpURLConnection) u.openConnection();
                }

                uc.setRequestProperty("Host", host);
                uc.setRequestProperty("Accept", "application/json, text/javascript, */*; q=0.01");
                if (methodPost) {
                    uc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                    uc.setRequestProperty("Content-Length", Integer.toString(params.length()));
                    uc.setRequestProperty("X-HTTP-Method-Override", "GET");
                } else {
                    uc.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
                }
                uc.setRequestProperty("X-Requested-With", "XMLHttpRequest");

                connection = (HttpURLConnection) uc;
                connection.setReadTimeout(timeout);
                connection.setRequestMethod(method);
                HttpURLConnection.setFollowRedirects(false); // TODO: Fix these (FilCab)
                connection.setDoInput(true);
                if (methodPost) {
                    connection.setDoOutput(true);

                    final OutputStream out = connection.getOutputStream();
                    final OutputStreamWriter wr = new OutputStreamWriter(out);
                    wr.write(params);
                    wr.flush();
                    wr.close();
                } else {
                    connection.setDoOutput(false);
                }

                final String encoding = connection.getContentEncoding();
                InputStream ins;

                if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
                    ins = new GZIPInputStream(connection.getInputStream());
                } else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
                    ins = new InflaterInputStream(connection.getInputStream(), new Inflater(true));
                } else {
                    ins = connection.getInputStream();
                }
                final InputStreamReader inr = new InputStreamReader(ins);
                final BufferedReader br = new BufferedReader(inr);

                readIntoBuffer(br, buffer);

                httpCode = connection.getResponseCode();

                final String paramsLog = params.replaceAll(passMatch, "password=***");
                Log.i(cgSettings.tag + " | JSON",
                        "[POST " + (int) (params.length() / 1024) + "k | " + httpCode + " | "
                                + (int) (buffer.length() / 1024) + "k] Downloaded " + "http://" + host + path
                                + "?" + paramsLog);

                connection.disconnect();
                br.close();
                ins.close();
                inr.close();
            } catch (IOException e) {
                httpCode = connection.getResponseCode();

                Log.e(cgSettings.tag, "cgeoBase.requestJSON.IOException: " + httpCode + ": "
                        + connection.getResponseMessage() + " ~ " + e.toString());
            }
        } catch (Exception e) {
            Log.e(cgSettings.tag, "cgeoBase.requestJSON: " + e.toString());
        }

        if (buffer != null && buffer.length() > 0) {
            break;
        }

        if (httpCode == 403) {
            // we're not allowed to download content, so let's move
            break;
        }
    }

    String page = null;
    if (httpCode == 302 && httpLocation != null) {
        final Uri newLocation = Uri.parse(httpLocation);
        if (newLocation.isRelative() == true) {
            page = requestJSONgc(host, path, params);
        } else {
            page = requestJSONgc(newLocation.getHost(), newLocation.getPath(), params);
        }
    } else {
        page = replaceWhitespace(buffer);
    }

    if (page != null) {
        return page;
    } else {
        return "";
    }
}

From source file:org.sakaiproject.lessonbuildertool.tool.producers.ShowPageProducer.java

private boolean UrlOk(String url) {
    String origurl = url;/*from   www.ja v  a  2s  . c om*/
    Boolean cached = (Boolean) urlCache.get(url);
    if (cached != null)
        return (boolean) cached;

    if (url.startsWith("http:") || url.startsWith("https:")) {
        // actual URL, check it out

        try {
            HttpURLConnection.setFollowRedirects(false);
            HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection();
            con.setRequestMethod("HEAD");
            con.setConnectTimeout(30 * 1000);
            boolean ret = (con.getResponseCode() == HttpURLConnection.HTTP_OK);
            urlCache.put(origurl, (Boolean) ret);
            return ret;
        } catch (java.net.SocketTimeoutException e) {
            log.error("Internationalization url lookup timed out for " + url
                    + ": Please check lessonbuilder.helpfolder. It appears that the host specified is not responding.");
            urlCache.put(origurl, (Boolean) false);
            return false;
        } catch (ProtocolException e) {
            urlCache.put(origurl, (Boolean) false);
            return false;
        } catch (IOException e) {
            urlCache.put(origurl, (Boolean) false);
            return false;
        }
    } else {
        // remove the leading /lessonbuilder-tool, since getresource is
        // relative to the top of the servlet
        int i = url.indexOf("/", 1);
        url = url.substring(i);
        try {
            // inside the war file, check the file system. That avoid issues
            // with odd deployments behind load balancers, where the user's URL may not
            // work from one of the front ends
            if (httpServletRequest.getSession().getServletContext().getResource(url) == null) {
                urlCache.put(origurl, (Boolean) false);
                return false;
            } else {
                urlCache.put(origurl, (Boolean) true);
                return true;
            }
        } catch (Exception e) { // probably malfformed url
            log.error("Internationalization url lookup failed for " + url + ": " + e);
            urlCache.put(origurl, (Boolean) true);
            return true;
        }

    }
}