Example usage for com.google.gwt.http.client Request fireOnResponseReceived

Introduction

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

Prototype

void fireOnResponseReceived(RequestCallback callback) 

Source Link

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 {//w w w . j a v a 2s .  c o  m
        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()));
    }
}

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