/// <summary>
/// Called when a request has been completed. Updates the item for the request.
/// </summary>
/// <param name="request"></param>
private void UpdateRequestListBoxItem(NHttpRequest request, NHttpResponse response)
{
// first clear the boder of all items
for (int i = 0; i < m_RequestsListBox.Items.Count; i++)
{
m_RequestsListBox.Items[i].Border = null;
}
// highlight the completed item in red
NListBoxItem item = m_Request2ListBoxItem[request];
item.Border = NBorder.CreateFilledBorder(NColor.LightCoral);
// update the group box header
NGroupBox groupBox = (NGroupBox)item.Content;
NLabel headerLabel = (NLabel)groupBox.Header.Content;
headerLabel.Text += " Response Status: " + response.Status.ToString() + ", Received In: " + (response.ReceivedAt - request.SentAt).TotalSeconds.ToString() + " seconds";
// Disable the Abort button (the first button of the item (first descentant of type button))
NButton abortButton = (NButton)item.GetFirstDescendant(NIsFilter <NNode, NButton> .Instance);
abortButton.Enabled = false;
// Enable the Headers Button (the last button of the item)
NButton headersButton = (NButton)item.GetLastDescendant(NIsFilter <NNode, NButton> .Instance);
headersButton.Tag = new object[] { request, response };
headersButton.Enabled = true;
}
private void OnViewResponseHeadersButtonClick(NEventArgs args)
{
// get the response form the button tag (see UpdateRequestListBoxItem) and display its headers
object[] array = (object[])args.TargetNode.Tag;
NHttpRequest request = (NHttpRequest)array[0];
NHttpResponse response = (NHttpResponse)array[1];
// create a top level window, setup as a dialog
NTopLevelWindow window = NApplication.CreateTopLevelWindow();
window.SetupDialogWindow(request.Uri.ToString(), true);
// create a list box for the headers
NListBox listBox = new NListBox();
window.Content = listBox;
// fill with header fields
INIterator <NHttpHeaderField> it = response.HeaderFields.GetIterator();
while (it.MoveNext())
{
listBox.Items.Add(new NListBoxItem(it.Current.ToString()));
}
// open the window
window.Open();
}
private void OnAbortRequestButtonClick(NEventArgs args)
{
// get the request form the button tag (see CreateRequestListBoxItem) and abort it
NHttpRequest request = (NHttpRequest)args.TargetNode.Tag;
request.Abort();
}
private void OnGetWikipediaHtmlClick(NEventArgs args)
{
// create a HTTP request for the Wikipedia home page and subscribe for Completed event
string wikipediaHtmlURI = "http://www.wikimedia.org";
NHttpRequest request = new NHttpRequest(wikipediaHtmlURI);
request.Completed += OnRequestCompleted;
// create a list box item for the request, prior to submittion and submit the request
CreateRequestListBoxItem(request);
request.Submit();
}
private void OnGetWikipediaLogoClick(NEventArgs args)
{
// create a HTTP request for the Wikipedia logo and subscribe for Completed event
string wikipediaLogoURI = "http://upload.wikimedia.org/wikipedia/commons/6/63/Wikipedia-logo.png";
NHttpRequest request = new NHttpRequest(wikipediaLogoURI);
request.Completed += OnRequestCompleted;
// create a list box item for the request, prior to submittion and submit the request
CreateRequestListBoxItem(request);
request.Submit();
}
private void GetGoogleHtmlClick(NEventArgs args)
{
// create a HTTP request for the Google home page
string googleHtmlURI = "http://www.google.com";
NHttpRequest request = new NHttpRequest(googleHtmlURI);
request.Completed += OnRequestCompleted;
// create a list box item for the request, prior to submition and submit the request
CreateRequestListBoxItem(request);
request.Submit();
}
private void GetGoogleLogoClick(NEventArgs args)
{
// create a HTTP request for the Google logo and subscribe for Completed event
string googleLogoURI = "http://www.google.com/images/srpr/logo3w.png";
NHttpRequest request = new NHttpRequest(googleLogoURI);
request.Headers[NHttpHeaderFieldName.Accept] = "image/png";
request.Completed += new Function <NUriRequest, NUriResponse>(OnRequestCompleted);
// create a list box item for the request, prior to submittion and submit the request
CreateRequestListBoxItem(request);
request.Submit();
}
/// <summary>
/// Called when a request is about to be submitted. Adds a new entry in the requests list box.
/// </summary>
/// <param name="request"></param>
private void CreateRequestListBoxItem(NHttpRequest request)
{
NGroupBox groupBox = new NGroupBox(new NLabel("URI: " + request.Uri.ToString()));
groupBox.HorizontalPlacement = ENHorizontalPlacement.Fit;
NStackPanel stack = new NStackPanel();
stack.HorizontalPlacement = ENHorizontalPlacement.Fit;
groupBox.Content = stack;
NStackPanel hstack = new NStackPanel();
hstack.Direction = ENHVDirection.LeftToRight;
hstack.HorizontalPlacement = ENHorizontalPlacement.Fit;
hstack.FillMode = ENStackFillMode.None;
hstack.FitMode = ENStackFitMode.Equal;
stack.Add(hstack);
// create the abort button.
// NOTE: the request is recorded in the button Tag
NButton abortButton = new NButton("Abort");
abortButton.Click += new Function <NEventArgs>(OnAbortRequestButtonClick);
abortButton.Tag = request;
hstack.Add(abortButton);
NButton headersButton = new NButton("View Response Headers");
headersButton.Click += new Function <NEventArgs>(OnViewResponseHeadersButtonClick);
headersButton.Tag = request;
headersButton.Enabled = false;
hstack.Add(headersButton);
// add item
NListBoxItem item = new NListBoxItem(groupBox);
item.BorderThickness = new NMargins(2);
item.Border = null;
m_RequestsListBox.Items.Add(item);
m_Request2ListBoxItem.Add(request, item);
}
private void OnSumbitCustomRequestClick(NEventArgs args)
{
try
{
// create a HTTP request for the custom URI and subscribe for Completed event
string uri = m_CustomURITextBox.Text;
NHttpRequest request = new NHttpRequest(uri);
request.AllowCache = false;
request.AllowServeFromCache = false;
request.Completed += new Function <NUriRequest, NUriResponse>(OnRequestCompleted);
// create a list box item for the request, prior to submittion and submit the request
CreateRequestListBoxItem(request);
request.Submit();
}
catch (Exception ex)
{
NMessageBox.Show("Failed to submit custom request.\n\nException was: " + ex.Message, "Failed to submit custom request",
ENMessageBoxButtons.OK, ENMessageBoxIcon.Error);
}
}
/// <summary>
/// Called by a NHttpRequest when it has been completed.
/// </summary>
/// <param name="response"></param>
private void OnRequestCompleted(NUriRequest request, NUriResponse response)
{
NHttpRequest httpRequest = (NHttpRequest)request;
NHttpResponse httpResponse = (NHttpResponse)response;
// update the list box item
UpdateRequestListBoxItem(httpRequest, httpResponse);
// update the response content holder
switch (response.Status)
{
case ENAsyncResponseStatus.Aborted:
// request has been aborted by the user -> do nothing.
break;
case ENAsyncResponseStatus.Failed:
// request has failed -> fill content with an error message
m_ResponseContentHolder.Content = new NLabel("Request for URI: " + request.Uri.ToString() + " failed. Error was: " + response.ErrorException.ToString());
break;
case ENAsyncResponseStatus.Succeeded:
// request succeded -> fill content with the response content
try
{
// get the Content-Type Http Header field, and split it to portions
// NOTE: the Content-Type is a multi value field. Values are seperated with the ';' char
string contentType = httpResponse.HeaderFields[NHttpHeaderFieldName.ContentType];
string[] contentTypes = contentType.Split(new char[] { ';' });
// normalize content type values (trim and make lower case)
for (int i = 0; i < contentTypes.Length; i++)
{
contentTypes[i] = contentTypes[i].Trim();
contentTypes[i] = contentTypes[i].ToLower();
}
// the first part of the content type is the mime type of the content
switch (contentTypes[0])
{
case "image/png":
case "image/jpeg":
case "image/bmp":
NImage image = new NImage(new NBytesImageSource(response.Data));
NImageBox imageBox = new NImageBox(image);
m_ResponseContentHolder.Content = new NScrollContent(imageBox);
break;
case "text/html":
case "application/json":
string charSet = (contentTypes.Length >= 1? contentTypes[1]: "charset=utf-8");
string html = "";
switch (charSet)
{
case "charset=utf-8":
html = Nevron.Nov.Text.NEncoding.UTF8.GetString(response.Data);
break;
default:
html = Nevron.Nov.Text.NEncoding.UTF8.GetString(response.Data);
break;
}
NTextBox textBox = new NTextBox();
textBox.Text = html;
m_ResponseContentHolder.Content = textBox;
break;
default:
break;
}
}
catch (Exception ex)
{
m_ResponseContentHolder.Content = new NLabel("Request for URI: " + request.Uri.ToString() + " decoding failed. Error was: " + ex.Message.ToString());
}
break;
}
}
