Example usage for com.google.gwt.xhr.client XMLHttpRequest getReadyState

List of usage examples for com.google.gwt.xhr.client XMLHttpRequest getReadyState

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Introduction

In this page you can find the example usage for com.google.gwt.xhr.client XMLHttpRequest getReadyState.

Prototype

public abstract int getReadyState();

Source Link

Document

Get's the current ready-state

Usage

From source file:io.reinert.requestor.RequestDispatcherImpl.java

License:Apache License

@Override
protected <D> void send(RequestOrder request, final Deferred<D> deferred, Class<D> resolveType,
        @Nullable Class<?> parametrizedType) {
    final HttpMethod httpMethod = request.getMethod();
    final String url = request.getUrl();
    final Headers headers = request.getHeaders();
    final Payload payload = request.getPayload();
    final ResponseType responseType = request.getResponseType();

    // Create XMLHttpRequest
    final XMLHttpRequest xmlHttpRequest = (XMLHttpRequest) XMLHttpRequest.create();

    // Open XMLHttpRequest
    try {//from  w  w w.j  a  va2s  . c  om
        xmlHttpRequest.open(httpMethod.getValue(), url);
    } catch (JavaScriptException e) {
        RequestPermissionException requestPermissionException = new RequestPermissionException(url);
        requestPermissionException.initCause(new RequestException(e.getMessage()));
        deferred.reject(requestPermissionException);
        return;
    }

    // Set withCredentials
    xmlHttpRequest.setWithCredentials(request.isWithCredentials());

    // Fulfill headers
    try {
        setHeaders(headers, xmlHttpRequest);
    } catch (JavaScriptException e) {
        deferred.reject(new RequestException("Could not manipulate the XHR headers: " + e.getMessage()));
        return;
    }

    // Set responseType
    xmlHttpRequest.setResponseType(responseType.getValue());

    // Create RequestCallback
    final RequestCallback callback = getRequestCallback(request, xmlHttpRequest, deferred, resolveType,
            parametrizedType);

    // Create the underlying request from gwt.http module
    final com.google.gwt.http.client.Request gwtRequest = new com.google.gwt.http.client.Request(xmlHttpRequest,
            request.getTimeout(), callback);

    // Properly configure XMLHttpRequest's onreadystatechange
    xmlHttpRequest.setOnReadyStateChange(new ReadyStateChangeHandler() {
        public void onReadyStateChange(com.google.gwt.xhr.client.XMLHttpRequest xhr) {
            if (xhr.getReadyState() == XMLHttpRequest.DONE) {
                xhr.clearOnReadyStateChange();
                ((XMLHttpRequest) xhr).clearOnProgress();
                gwtRequest.fireOnResponseReceived(callback);
            }
        }
    });

    // Set XMLHttpRequest's onprogress if available binding to promise's progress
    xmlHttpRequest.setOnProgress(new ProgressHandler() {
        @Override
        public void onProgress(ProgressEvent progress) {
            deferred.notifyDownload(new RequestProgressImpl(progress));
        }
    });

    // Set XMLHttpRequest's upload onprogress if available binding to promise's progress
    xmlHttpRequest.setUploadOnProgress(new ProgressHandler() {
        @Override
        public void onProgress(ProgressEvent progress) {
            deferred.notifyUpload(new RequestProgressImpl(progress));
        }
    });

    // Pass the connection to the deferred to enable it to cancel the request if necessary (RECOMMENDED)
    deferred.setHttpConnection(getConnection(gwtRequest));

    // Send the request
    try {
        if (payload != null) {
            if (payload.isString() != null) {
                xmlHttpRequest.send(payload.isString());
            } else {
                xmlHttpRequest.send(payload.isJavaScriptObject());
            }
        } else {
            xmlHttpRequest.send();
        }
    } catch (JavaScriptException e) {
        deferred.reject(new RequestDispatchException("Could not send the XHR: " + e.getMessage()));
    }
}

From source file:jake2.gwt.client.GwtResourceLoaderImpl.java

License:Open Source License

public void loadResourceAsync(final String path, final ResourceLoader.Callback callback) {
    XMLHttpRequest req = XMLHttpRequest.create();

    final String eol = path.endsWith(".bsp") ? "\n" : "\r";

    final Exception e = new Exception();
    final int mySequenceNumber = freeSequenceNumber++;

    req.setOnReadyStateChange(new ReadyStateChangeHandler() {
        boolean receivingMsg;

        public void onReadyStateChange(final XMLHttpRequest xhr) {
            if (xhr.getReadyState() == 3 && !receivingMsg) {
                Com.Printf("Receiving #" + mySequenceNumber + ": " + path + eol);
                receivingMsg = true;/*from   w ww . j  a va  2 s.c o m*/
            } else if (xhr.getReadyState() == 4) {
                if (mySequenceNumber < ignoreSequenceNumbersBelow) {
                    Com.Printf("Ignoring outdated response #" + mySequenceNumber + ": " + path + "\n");
                } else {
                    String response;
                    if (xhr.getStatus() != 200) {
                        Com.Printf("Failed to load file #" + currentSequenceNumber + "\n");
                        Compatibility.printStackTrace(e);
                        ResourceLoader.fail(new IOException("status = " + xhr.getStatus()));
                        response = null;
                    } else {
                        response = xhr.getResponseText();
                        Com.Printf("Received response #" + mySequenceNumber + ": " + path + "\r");
                    }
                    readyList.add(0, new ResponseHandler(mySequenceNumber, callback, response));
                    if (mySequenceNumber == currentSequenceNumber) {
                        processReadyList();
                    }
                }
            }
        }
    });

    Com.Printf("Requesting: " + path + eol);

    overrideMimeType(req, "text/plain; charset=x-user-defined");
    req.open("GET", "/baseq2/" + path);
    req.send();
}

From source file:net.npe.gwt.xhr.client.ArrayBufferRequest.java

License:MIT License

public ArrayBufferRequest(String url, final Handler handler) {
    xhr = XMLHttpRequest.create();/*  ww w  .j  a  v a 2s  .c  o m*/
    xhr.setResponseType(ResponseType.ArrayBuffer);
    xhr.setOnReadyStateChange(new ReadyStateChangeHandler() {
        @Override
        public void onReadyStateChange(XMLHttpRequest xhr) {
            if (xhr.getReadyState() == XMLHttpRequest.DONE) {
                if (xhr.getStatus() >= 400) {
                    if (handler != null)
                        handler.onFailure();
                } else {
                    if (handler != null)
                        handler.onSuccess(xhr.getResponseArrayBuffer());
                }
            }
        }
    });
    xhr.open("GET", url);
}

From source file:net.npe.image.util.gwt.GwtImageReader.java

License:MIT License

public static void read(final String url, final PixelImageRequestHandler handler) {
    XMLHttpRequest xhr = XMLHttpRequest.create();
    xhr.setResponseType(ResponseType.ArrayBuffer);
    xhr.setOnReadyStateChange(new ReadyStateChangeHandler() {
        @Override//  w w  w . j ava 2  s  .c o m
        public void onReadyStateChange(XMLHttpRequest xhr) {
            if (xhr.getReadyState() == XMLHttpRequest.DONE) {
                if (xhr.getStatus() >= 400) {
                    handler.onFailure(xhr.getStatusText());
                } else {
                    ImageType type = ImageReader.getImageType(url);
                    if (type != null) {
                        ArrayBuffer arrayBuffer = xhr.getResponseArrayBuffer();
                        try {
                            PixelImage image = read(arrayBuffer, type);
                            handler.onSuccess(image);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    } else {
                        handler.onFailure("Unsupport image format: " + url);
                    }
                }
            }
        }
    });
    xhr.open("GET", url);
}

From source file:net.npe.image.util.gwt.GwtImageReader.java

License:MIT License

public static void createCanvas(final String url, final CanvasRequestHandler handler) {
    XMLHttpRequest xhr = XMLHttpRequest.create();
    xhr.setResponseType(ResponseType.ArrayBuffer);
    xhr.setOnReadyStateChange(new ReadyStateChangeHandler() {
        @Override/*from  w ww . java 2 s. com*/
        public void onReadyStateChange(XMLHttpRequest xhr) {
            if (xhr.getReadyState() == XMLHttpRequest.DONE) {
                if (xhr.getStatus() >= 400) {
                    handler.onFailure(xhr.getStatusText());
                } else {
                    ImageType type = ImageReader.getImageType(url);
                    if (type != null) {
                        ArrayBuffer arrayBuffer = xhr.getResponseArrayBuffer();
                        try {
                            Canvas canvas = createCanvas(arrayBuffer, type);
                            handler.onSuccess(canvas);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    } else {
                        handler.onFailure("Unsupport image format: " + url);
                    }
                }
            }
        }
    });
    xhr.open("GET", url);
}

From source file:net.zschech.gwt.comet.client.impl.HTTPRequestCometTransport.java

License:Apache License

@Override
public void connect(int connectionCount) {
    super.connect(connectionCount);
    read = 0;//w ww.j a v  a 2 s  .  co m

    xmlHttpRequest = XMLHttpRequest.create();
    try {
        xmlHttpRequest.open("GET", getUrl(connectionCount));
        xmlHttpRequest.setRequestHeader("Accept", "application/comet");
        xmlHttpRequest.setOnReadyStateChange(new ReadyStateChangeHandler() {
            @Override
            public void onReadyStateChange(XMLHttpRequest request) {
                if (!disconnecting) {
                    switch (request.getReadyState()) {
                    case XMLHttpRequest.LOADING:
                        onReceiving(request.getStatus(), request.getResponseText());
                        break;
                    case XMLHttpRequest.DONE:
                        onLoaded(request.getStatus(), request.getResponseText());
                        break;
                    }
                }
            }
        });
        xmlHttpRequest.send();
    } catch (JavaScriptException e) {
        xmlHttpRequest = null;
        listener.onError(new RequestException(e.getMessage()), false);
    }
}

From source file:org.atmosphere.gwt.client.impl.HTTPRequestCometTransport.java

License:Apache License

@Override
public void connect(int connectionCount) {
    init();//w  w w .jav a  2  s .co  m
    xmlHttpRequest = XMLHttpRequest.create();
    try {
        xmlHttpRequest.open("GET", getUrl(connectionCount));
        xmlHttpRequest.setRequestHeader("Accept", "application/comet");
        xmlHttpRequest.setOnReadyStateChange(new ReadyStateChangeHandler() {
            @Override
            public void onReadyStateChange(XMLHttpRequest request) {
                if (!aborted) {
                    switch (request.getReadyState()) {
                    case XMLHttpRequest.LOADING:
                        onReceiving(request.getStatus(), request.getResponseText());
                        if (needPolling()) {
                            pollingTimer.scheduleRepeating(POLLING_INTERVAL);
                        }
                        break;
                    case XMLHttpRequest.DONE:
                        onLoaded(request.getStatus(), request.getResponseText());
                        pollingTimer.cancel();
                        break;
                    }
                } else {
                    request.clearOnReadyStateChange();
                    if (request.getReadyState() != XMLHttpRequest.DONE) {
                        request.abort();
                    }
                }
            }
        });
        xmlHttpRequest.send();
    } catch (JavaScriptException e) {
        if (xmlHttpRequest != null) {
            xmlHttpRequest.abort();
            xmlHttpRequest = null;
        }
        listener.onError(new RequestException(e.getMessage()), false);
    }
}

From source file:org.oscim.tiling.source.LwHttp.java

License:Open Source License

public void sendRequest(MapTile tile, final UrlTileDataSource dataSource) {

    String url = mTileSource.getTileUrl(tile);

    mHttpRequest = XMLHttpRequest.create();
    mHttpRequest.open("GET", url);
    mHttpRequest.setResponseType(ResponseType.ArrayBuffer);

    mResponseHandler = new ReadyStateChangeHandler() {

        @Override//  w  w w .  ja v  a2s  . c  o m
        public void onReadyStateChange(XMLHttpRequest xhr) {
            int state = xhr.getReadyState();
            //log.debug(mCurrentUrl + "response " + status + "/" + state);

            if (state == XMLHttpRequest.DONE) {
                if (xhr.getStatus() == 200) {
                    Uint8Array buf = Uint8ArrayNative.create(xhr.getResponseArrayBuffer());
                    dataSource.process(new Buffer(buf));
                } else {
                    dataSource.process(null);
                }
                mHttpRequest = null;
            }
        }
    };

    mHttpRequest.setOnReadyStateChange(mResponseHandler);
    mHttpRequest.send();
}

From source file:org.parallax3d.parallax.platforms.gwt.preloader.AssetDownloader.java

License:Apache License

public void loadText(String url, final FileListener<String> listener) {
    XMLHttpRequest request = XMLHttpRequest.create();
    request.setOnReadyStateChange(new ReadyStateChangeHandler() {
        @Override//from   w w  w.j  a  v a  2 s  .co  m
        public void onReadyStateChange(XMLHttpRequest xhr) {
            if (xhr.getReadyState() == XMLHttpRequest.DONE) {
                if (xhr.getStatus() != 200) {
                    listener.onFailure();
                } else {
                    listener.onSuccess(xhr.getResponseText());
                }
            }
        }
    });
    setOnProgress(request, listener);
    request.open("GET", url);
    request.setRequestHeader("Content-Type", "text/plain; charset=utf-8");
    request.send();
}

From source file:org.parallax3d.parallax.platforms.gwt.preloader.AssetDownloader.java

License:Apache License

public void loadBinary(final String url, final FileListener<Blob> listener) {
    XMLHttpRequest request = XMLHttpRequest.create();
    request.setOnReadyStateChange(new ReadyStateChangeHandler() {
        @Override/*from w w  w .j  a v  a 2 s . c o  m*/
        public void onReadyStateChange(XMLHttpRequest xhr) {
            if (xhr.getReadyState() == XMLHttpRequest.DONE) {
                if (xhr.getStatus() != 200) {
                    listener.onFailure();
                } else {
                    Int8Array data = TypedArrays.createInt8Array(xhr.getResponseArrayBuffer());
                    listener.onSuccess(new Blob(data));
                }
            }
        }
    });
    setOnProgress(request, listener);
    request.open("GET", url);
    request.setResponseType(ResponseType.ArrayBuffer);
    request.send();
}