Example usage for com.google.gwt.http.client RequestCallback RequestCallback

List of usage examples for com.google.gwt.http.client RequestCallback RequestCallback

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Introduction

In this page you can find the example usage for com.google.gwt.http.client RequestCallback RequestCallback.

Prototype

RequestCallback

Source Link

Usage

From source file:com.google.gwt.examples.http.client.PostExample.java

public static void doPost(String url, String postData) {
    RequestBuilder builder = new RequestBuilder(RequestBuilder.POST, url);

    try {// w  w w  .jav  a 2s .  c om
        builder.setHeader("Content-Type", "application/x-www-form-urlencoded");
        Request response = builder.sendRequest(postData, new RequestCallback() {

            public void onError(Request request, Throwable exception) {
                // code omitted for clarity
            }

            public void onResponseReceived(Request request, Response response) {
                // code omitted for clarity
            }
        });
    } catch (RequestException e) {
        Window.alert("Failed to send the request: " + e.getMessage());
    }
}

From source file:com.google.gwt.examples.http.client.TimeoutExample.java

public static void doGetWithTimeout(String url) {
    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);

    try {//from  www .j a  va 2 s.c  om
        /*
         * wait 2000 milliseconds for the request to complete
         */
        builder.setTimeoutMillis(2000);

        Request response = builder.sendRequest(null, new RequestCallback() {
            public void onError(Request request, Throwable exception) {
                if (exception instanceof RequestTimeoutException) {
                    // handle a request timeout
                } else {
                    // handle other request errors
                }
            }

            public void onResponseReceived(Request request, Response response) {
                // code omitted for clarity
            }
        });
    } catch (RequestException e) {
        Window.alert("Failed to send the request: " + e.getMessage());
    }
}

From source file:com.google.gwt.sample.authrequest.client.SampleAuthRequestTransport.java

License:Apache License

@Override
protected RequestCallback createRequestCallback(final TransportReceiver receiver) {
    final RequestCallback superCallback = super.createRequestCallback(receiver);

    return new RequestCallback() {
        @Override//from w w  w  .ja v  a  2  s  .  c  om
        public void onError(Request request, Throwable exception) {
            superCallback.onError(request, exception);
        }

        @Override
        public void onResponseReceived(Request request, Response response) {
            /*
             * The GaeAuthFailure filter responds with Response.SC_UNAUTHORIZED and
             * adds a "login" url header if the user is not logged in. When we
             * receive that combo, post an event so that the app can handle things
             * as it sees fit.
             */
            if (Response.SC_UNAUTHORIZED == response.getStatusCode()) {
                String loginUrl = response.getHeader("login");
                if (loginUrl != null) {
                    /*
                     * Hand the receiver a non-fatal callback, so that
                     * com.google.web.bindery.requestfactory.shared.Receiver will not
                     * post a runtime exception.
                     */
                    receiver.onTransportFailure(new ServerFailure("Unauthenticated user", null, null, false));
                    eventBus.fireEvent(new SampleAuthenticationFailureEvent(loginUrl));
                    return;
                }
            }
            superCallback.onResponseReceived(request, response);
        }
    };
}

From source file:com.google.gwt.sample.client.mystockwatcherEntryPoint.java

/**
 * Generate random stock prices.//from   w  w w.  j a  va 2s  .  c o  m
 */
private void refreshWatchList() {
    if (stocks.size() == 0) {
        return;
    }

    String url = JSON_URL;

    // Append watch list stock symbols to query URL.
    Iterator iter = stocks.iterator();
    while (iter.hasNext()) {
        url += iter.next();
        if (iter.hasNext()) {
            url += "+";
        }
    }

    url = URL.encode(url);

    // Send request to server and catch any errors.
    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);

    try {
        Request request = builder.sendRequest(null, new RequestCallback() {

            @Override
            public void onError(Request request, Throwable exception) {
                displayError("Couldn't retrieve JSON");
            }

            public void onResponseReceived(Request request, Response response) {
                if (200 == response.getStatusCode()) {
                    updateTable(asArrayOfStockData(response.getText()));
                } else {
                    displayError("Couldn't retrieve JSON (" + response.getStatusText() + ")");
                }
            }
        });
    } catch (RequestException e) {
        displayError("Couldn't retrieve JSON");
    }
}

From source file:com.google.gwt.sample.gaerequest.client.GaeAuthRequestTransport.java

License:Apache License

@Override
protected RequestCallback createRequestCallback(final TransportReceiver receiver) {
    final RequestCallback superCallback = super.createRequestCallback(receiver);

    return new RequestCallback() {
        @Override/*w ww.j a v  a 2  s  .  c om*/
        public void onError(Request request, Throwable exception) {
            superCallback.onError(request, exception);
        }

        @Override
        public void onResponseReceived(Request request, Response response) {
            /*
             * The GaeAuthFailure filter responds with Response.SC_UNAUTHORIZED and
             * adds a "login" url header if the user is not logged in. When we
             * receive that combo, post an event so that the app can handle things
             * as it sees fit.
             */
            if (Response.SC_UNAUTHORIZED == response.getStatusCode()) {
                String loginUrl = response.getHeader("login");
                if (loginUrl != null) {
                    /*
                     * Hand the receiver a non-fatal callback, so that
                     * com.google.web.bindery.requestfactory.shared.Receiver will not
                     * post a runtime exception.
                     */
                    receiver.onTransportFailure(new ServerFailure("Unauthenticated user", null, null, false));
                    eventBus.fireEvent(new GaeAuthenticationFailureEvent(loginUrl));
                    return;
                }
            }
            superCallback.onResponseReceived(request, response);
        }
    };
}

From source file:com.google.gwt.sample.healthyeatingapp.client.FacebookGraph.java

private void QueryGraph(String id, Method method, String params,
        final Callback<JSONObject, Throwable> callback) {
    final String requestData = "access_token=" + token + (params != null ? "&" + params : "");
    RequestBuilder builder;//from  www .  j av a  2 s  .  co m
    if (method == RequestBuilder.POST) {
        builder = new RequestBuilder(method, "https://graph.facebook.com/" + id);
        builder.setHeader("Content-Type", "application/x-www-form-urlencoded");
    } else if (method == RequestBuilder.GET) {
        builder = new RequestBuilder(method, "https://graph.facebook.com/" + id + "?" + requestData);
    } else {
        callback.onFailure(new IOException("doGraph only supports GET and POST requests"));
        return;
    }
    try {
        builder.sendRequest(requestData, new RequestCallback() {
            public void onError(Request request, Throwable exception) {
                callback.onFailure(exception);
            }

            public void onResponseReceived(Request request, Response response) {
                if (Response.SC_OK == response.getStatusCode()) {
                    callback.onSuccess(JSONParser.parseStrict(response.getText()).isObject());
                } else if (Response.SC_BAD_REQUEST == response.getStatusCode()) {
                    callback.onFailure(new IOException("Error: " + response.getText()));
                } else {
                    callback.onFailure(
                            new IOException("Couldn't retrieve JSON (" + response.getStatusText() + ")"));
                }
            }

        });
    } catch (RequestException e) {
        callback.onFailure(e);
    }
}

From source file:com.google.gwt.sample.showcase.client.ContentWidget.java

License:Apache License

/**
 * Get the source code for a raw file.//from   ww  w .  j a  v a  2s . c  o m
 * 
 * @param filename the filename to load
 * @param callback the callback to call when loaded
 */
public void getRawSource(final String filename, final Callback<String> callback) {
    if (rawSource.containsKey(filename)) {
        callback.onSuccess(rawSource.get(filename));
    } else {
        RequestCallback rc = new RequestCallback() {
            public void onError(Request request, Throwable exception) {
                callback.onError();
            }

            public void onResponseReceived(Request request, Response response) {
                String text = response.getText();
                rawSource.put(filename, text);
                callback.onSuccess(text);
            }
        };

        String className = this.getClass().getName();
        className = className.substring(className.lastIndexOf(".") + 1);
        sendSourceRequest(rc, ShowcaseConstants.DST_SOURCE_RAW + filename + ".html");
    }
}

From source file:com.google.gwt.sample.showcase.client.ContentWidget.java

License:Apache License

/**
 * Request the styles associated with the widget.
 * //w  w w . j av  a2 s.c o m
 * @param callback the callback used when the styles become available
 */
public void getStyle(final Callback<String> callback) {
    if (styleDefs != null) {
        callback.onSuccess(styleDefs);
    } else {
        RequestCallback rc = new RequestCallback() {
            public void onError(Request request, Throwable exception) {
                callback.onError();
            }

            public void onResponseReceived(Request request, Response response) {
                styleDefs = response.getText();
                callback.onSuccess(styleDefs);
            }
        };

        String srcPath = ShowcaseConstants.DST_SOURCE_STYLE + Showcase.THEME;
        if (LocaleInfo.getCurrentLocale().isRTL()) {
            srcPath += "_rtl";
        }
        String className = this.getClass().getName();
        className = className.substring(className.lastIndexOf(".") + 1);
        sendSourceRequest(rc, srcPath + "/" + className + ".html");
    }
}

From source file:com.google.gwt.sample.showcase.client.ContentWidget.java

License:Apache License

/**
 * Request the source code associated with the widget.
 * /*from ww w . j a v  a 2  s  .c  o m*/
 * @param callback the callback used when the source become available
 */
public void getSource(final Callback<String> callback) {
    if (sourceCode != null) {
        callback.onSuccess(sourceCode);
    } else {
        RequestCallback rc = new RequestCallback() {
            public void onError(Request request, Throwable exception) {
                callback.onError();
            }

            public void onResponseReceived(Request request, Response response) {
                sourceCode = response.getText();
                callback.onSuccess(sourceCode);
            }
        };

        String className = this.getClass().getName();
        className = className.substring(className.lastIndexOf(".") + 1);
        sendSourceRequest(rc, ShowcaseConstants.DST_SOURCE_EXAMPLE + className + ".html");
    }
}

From source file:com.google.gwt.sample.simplexml.client.SimpleXML.java

License:Apache License

public void onModuleLoad() {
    RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, "customerRecord.xml");

    try {/* w  ww.j a  va2  s . c o  m*/
        requestBuilder.sendRequest(null, new RequestCallback() {
            public void onError(Request request, Throwable exception) {
                requestFailed(exception);
            }

            public void onResponseReceived(Request request, Response response) {
                renderXML(response.getText());
            }
        });
    } catch (RequestException ex) {
        requestFailed(ex);
    }
}