Example usage for com.google.gwt.http.client RequestBuilder GET

Introduction

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

Prototype

Method GET

To view the source code for com.google.gwt.http.client RequestBuilder GET.

Click Source Link

Document

Specifies that the HTTP GET method should be used.

Usage

From source file:net.autosauler.ballance.client.gui.ChangeLogPanel.java

License:Apache License

/**
 * Instantiates a new change log panel./* w w  w.  ja va  2s. c  om*/
 */
private ChangeLogPanel() {

    MainPanel.setCommInfo(true);
    try {
        new RequestBuilder(RequestBuilder.GET, "CHANGELOG").sendRequest("", new RequestCallback() {
            @Override
            public void onError(Request res, Throwable throwable) {
                MainPanel.setCommInfo(false);
                Log.error(throwable.getMessage());
            }

            @Override
            public void onResponseReceived(Request request, Response response) {
                MainPanel.setCommInfo(false);
                String text = response.getText();
                HTML w = new HTML("<p>" + text + "</p>");
                d.setWidget(w);

            }
        });
    } catch (RequestException e) {
        MainPanel.setCommInfo(false);
        Log.error(e.getMessage());
    }

    d = new DecoratorPanel();
    d.setWidth("100%");

    initWidget(d);
}

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From source file:net.dancioi.jcsphotogallery.client.model.ReadXMLGeneric.java

License:Open Source License

/**
 * Gets the XML file from http server.//w w w .  j ava2s. c om
 */
public void readXmlFile(final String file, final int flag) {
    RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, file);
    try {
        requestBuilder.sendRequest(null, new RequestCallback() {
            public void onError(Request request, Throwable exception) {
                showException("Error sending request");
            }

            public void onResponseReceived(Request request, Response response) {
                if (200 == response.getStatusCode()) {
                    parseXMLString(response.getText(), flag); // careful here, this is an asynchronous callback.
                } else if (404 == response.getStatusCode()) {
                    showException("File " + file + " not found on server. Wrong name or missing.");
                } else {
                    showException("Other exception on GET the " + file + " file");
                }
            }
        });
    } catch (RequestException ex) {
        new ReadException("Error sending request");
    }
}

---

From source file:net.opentsdb.tsd.client.QueryUi.java

License:Open Source License

private void asyncGetJson(final String url, final GotJsonCallback callback) {
    final RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
    try {/* w  ww. j a  va  2s .c  o m*/
        builder.sendRequest(null, new RequestCallback() {
            public void onError(final Request request, final Throwable e) {
                displayError("Failed to get " + url + ": " + e.getMessage());
                // Since we don't call the callback we've been given, reset this
                // bit of state as we're not going to retry anything right now.
                pending_requests = 0;
            }

            public void onResponseReceived(final Request request, final Response response) {
                final int code = response.getStatusCode();
                if (code == Response.SC_OK) {
                    clearError();
                    callback.got(JSONParser.parse(response.getText()));
                    return;
                } else if (code >= Response.SC_BAD_REQUEST) { // 400+ => Oops.
                    // Since we don't call the callback we've been given, reset this
                    // bit of state as we're not going to retry anything right now.
                    pending_requests = 0;
                    String err = response.getText();
                    // If the response looks like a JSON object, it probably contains
                    // an error message.
                    if (!err.isEmpty() && err.charAt(0) == '{') {
                        final JSONValue json = JSONParser.parse(err);
                        final JSONObject result = json == null ? null : json.isObject();
                        final JSONValue jerr = result == null ? null : result.get("err");
                        final JSONString serr = jerr == null ? null : jerr.isString();
                        err = serr.stringValue();
                        // If the error message has multiple lines (which is common if
                        // it contains a stack trace), show only the first line and
                        // hide the rest in a panel users can expand.
                        final int newline = err.indexOf('\n', 1);
                        final String msg = "Request failed: " + response.getStatusText();
                        if (newline < 0) {
                            displayError(msg + ": " + err);
                        } else {
                            displayError(msg);
                            final DisclosurePanel dp = new DisclosurePanel(err.substring(0, newline));
                            RootPanel.get("queryuimain").add(dp); // Attach the widget.
                            final InlineLabel content = new InlineLabel(err.substring(newline, err.length()));
                            content.addStyleName("fwf"); // For readable stack traces.
                            dp.setContent(content);
                            current_error.getElement().appendChild(dp.getElement());
                        }
                    } else {
                        displayError("Request failed while getting " + url + ": " + response.getStatusText());
                        // Since we don't call the callback we've been given, reset this
                        // bit of state as we're not going to retry anything right now.
                        pending_requests = 0;
                    }
                    graphstatus.setText("");
                }
            }
        });
    } catch (RequestException e) {
        displayError("Failed to get " + url + ": " + e.getMessage());
    }
}

---

From source file:net.opentsdb.tsd.client.RemoteOracle.java

License:Open Source License

@Override
public void requestSuggestions(final Request request, final Callback callback) {
    if (current != null) {
        pending_req = request;//  w w w . ja v a2 s.c o m
        pending_cb = callback;
        return;
    }
    current = callback;
    {
        final String this_query = request.getQuery();
        // Check if we can serve this from our local cache, without even talking
        // to the server.  This is possible if either of those is true:
        //   1. We've already seen this query recently.
        //   2. This new query precedes another one and the user basically just
        //      typed another letter, so if the new query is "less than" the last
        //      result we got from the server, we know we already cached the full
        //      range of results covering the new request.
        if ((last_query != null && last_query.compareTo(this_query) <= 0
                && this_query.compareTo(last_suggestion) < 0) || queries_seen.check(this_query)) {
            current = null;
            cache.requestSuggestions(request, callback);
            return;
        }
        last_query = this_query;
    }

    final RequestBuilder builder = new RequestBuilder(RequestBuilder.GET,
            SUGGEST_URL + type + "&q=" + last_query);
    try {
        builder.sendRequest(null, new RequestCallback() {
            public void onError(final com.google.gwt.http.client.Request r, final Throwable e) {
                current = null; // Something bad happened, drop the current request.
                if (pending_req != null) { // But if we have another waiting...
                    requestSuggestions(pending_req, pending_cb); // ... try it now.
                }
            }

            // Need to use fully-qualified names as this class inherits already
            // from a pair of inner classes called Request / Response :-/
            public void onResponseReceived(final com.google.gwt.http.client.Request r,
                    final com.google.gwt.http.client.Response response) {
                if (response.getStatusCode() == com.google.gwt.http.client.Response.SC_OK
                        // Is this response still relevant to what the requester wants?
                        && requester.getText().startsWith(last_query)) {
                    final JSONValue json = JSONParser.parse(response.getText());
                    // In case this request returned nothing, we pretend the last
                    // suggestion ended with the largest character possible, so we
                    // won't send more requests to the server if the user keeps
                    // adding extra characters.
                    last_suggestion = last_query + "\377";
                    if (json != null && json.isArray() != null) {
                        final JSONArray results = json.isArray();
                        final int n = Math.min(request.getLimit(), results.size());
                        for (int i = 0; i < n; i++) {
                            final JSONValue suggestion = results.get(i);
                            if (suggestion == null || suggestion.isString() == null) {
                                continue;
                            }
                            final String suggestionstr = suggestion.isString().stringValue();
                            last_suggestion = suggestionstr;
                            cache.add(suggestionstr);
                        }
                        cache.requestSuggestions(request, callback);
                        pending_req = null;
                        pending_cb = null;
                    }
                }
                current = null; // Regardless of what happened above, this is done.
                if (pending_req != null) {
                    final Request req = pending_req;
                    final Callback cb = pending_cb;
                    pending_req = null;
                    pending_cb = null;
                    requestSuggestions(req, cb);
                }
            }
        });
    } catch (RequestException ignore) {
    }
}

---

From source file:net.s17fabu.vip.gwt.showcase.client.ContentWidget.java

License:Apache License

/**
 * Load the contents of a remote file into the specified widget.
 * /* ww w.ja va 2 s.c  om*/
 * @param url a partial path relative to the module base URL
 * @param target the target Widget to place the contents
 * @param callback the callback when the call completes
 */
protected void requestSourceContents(String url, final HTML target, final RequestCallback callback) {
    // Show the loading image
    if (loadingImage == null) {
        loadingImage = "<img src=\"" + GWT.getModuleBaseURL() + "images/loading.gif\">";
    }
    target.setDirection(HasDirection.Direction.LTR);
    DOM.setStyleAttribute(target.getElement(), "textAlign", "left");
    target.setHTML("&nbsp;&nbsp;" + loadingImage);

    // Request the contents of the file
    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, GWT.getModuleBaseURL() + url);
    RequestCallback realCallback = new RequestCallback() {
        public void onError(Request request, Throwable exception) {
            target.setHTML("Cannot find resource");
            if (callback != null) {
                callback.onError(request, exception);
            }
        }

        public void onResponseReceived(Request request, Response response) {
            target.setHTML(response.getText());
            if (callback != null) {
                callback.onResponseReceived(request, response);
            }
        }
    };
    builder.setCallback(realCallback);

    // Send the request
    Request request = null;
    try {
        request = builder.send();
    } catch (RequestException e) {
        realCallback.onError(request, e);
    }
}

---

From source file:net.skyesoft.nhs.dka.client.Audit.java

License:Apache License

public void loadPreviousData(String studyNo) {
    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET,
            Defines.FORM_HANDLER + "?mode=loaddata&StudyNo=" + studyNo + "&TableName=" + PAGE_ID + "&"
                    + Utils.DATE_PARAM + "=" + Utils.getDate());
    builder.setUser(Defines.USERNAME);/*from ww w.ja v  a2 s .  co m*/
    builder.setPassword(Defines.PASSWORD);
    builder.setTimeoutMillis(Defines.TIMEOUT);

    try {
        builder.sendRequest(null, new PreviousDataLoader());
    } catch (RequestException re) {
        Window.alert("Failed to load the data for Audit : " + re.getMessage());
    }
}

---

From source file:next.celebs.api.API.java

License:Apache License

public void getYahooImages(final Response<ArrayList<YahooPhoto>> response) {
    // JsonArrayReader<YahooPhoto, JsArray<? extends JavaScriptObject>> reader = new JsonArrayReader<YahooPhoto,
    // JsArray<? extends JavaScriptObject>>() {
    // @Override/*from  w  ww.j a  va  2  s .  c o  m*/
    // public void read(ArrayList<YahooPhoto> data, String jsonData) {
    // response.read(data);
    // response.afterRead(jsonData);
    // }
    // };
    String url = "http://search.yahooapis.com/ImageSearchService/V1/imageSearch?query=victoria%2Bsecret&appid=rV3eqIDV34GjBZBX2fRuLJ5qkmKe2qyRXcN_ZtBJv0Eo6Uh7b9OUPx.MbRXI8C6u0xo-&results=5&output=json&";
    // String url =
    // "/yapi/ImageSearchService/V1/imageSearch?query=victoria%2Bsecret&appid=rV3eqIDV34GjBZBX2fRuLJ5qkmKe2qyRXcN_ZtBJv0Eo6Uh7b9OUPx.MbRXI8C6u0xo-&results=5&output=json&";
    // HTTP.doGet(url, null, reader);

    // String url = "http://127.0.0.1:8888/";
    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);

    JsonArrayReader<YahooPhoto, JsArray<? extends JavaScriptObject>> reader = new JsonArrayReader<YahooPhoto, JsArray<? extends JavaScriptObject>>() {
        @Override
        public void read(ArrayList<YahooPhoto> data, String jsonData) {
            response.read(data);
            response.afterRead(jsonData);
        }
    };

    try {

        class ResponseReader2 extends ResponseReader {

            @Override
            public String getName() {
                return "ResponseReader2";
            }

            @Override
            public void onSuccess(com.google.gwt.http.client.Response resp) {
                Window.alert("succss: " + resp.getText());
            }
        }

        Window.alert("before GET '" + url + "'");
        builder.sendRequest(null, new Callback_(reader));
    } catch (RequestException e) {
        Window.alert("doGet:exc " + e.getMessage());
        Log.error("RequestException: " + e.getMessage());
        // responseReader.onError(null, e);
    }
}

---

From source file:next.celebs.api.HTTP.java

License:Apache License

public static void doGet(String url, ResponseReader responseReader) {

    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, URL.encode(url));

    try {//from  w ww .j a va 2  s .c  o m
        builder.sendRequest(null, new Callback_(responseReader));
    } catch (RequestException e) {
        Window.alert("doGet:exc " + e.getMessage());
        Log.error("RequestException: " + e.getMessage());
        responseReader.onError(null, e);
    }
}

---

From source file:next.celebs.api.HTTP.java

License:Apache License

public static void doGetRelaxed(String url, ResponseReader responseReader) {

    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, URL.encode(url));
    try {/*from   w  w w. j  av a 2 s.  c  o  m*/
        builder.sendRequest(null, new RelaxedCallback_(responseReader));
    } catch (RequestException e) {
        responseReader.onError(null, e);
    }
}

---

From source file:next.celebs.dao.WikipediaDao.java

License:Apache License

public static void getWiki(String url, ResponseReader responseReader) {

    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, URL.encode(url));
    try {//ww w . j ava  2 s  . c o m
        builder.sendRequest(null, new Callback_(responseReader));
    } catch (RequestException e) {
        Log.error("RequestException: " + e.getMessage());
        responseReader.onError(null, e);
    }
}

---

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