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//-----------------------------------------------------------------------
// <copyright file="OpenIdButton.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OpenId.RelyingParty {
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Drawing.Design;
using System.Globalization;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Web;
using System.Web.UI;
using DotNetOpenAuth.Messaging;
/// <summary>
/// An ASP.NET control that renders a button that initiates an
/// authentication when clicked.
/// </summary>
public class OpenIdButton : OpenIdRelyingPartyControlBase {
#region Property defaults
/// <summary>
/// The default value for the <see cref="Text"/> property.
/// </summary>
private const string TextDefault = "Log in with [Provider]!";
/// <summary>
/// The default value for the <see cref="PrecreateRequest"/> property.
/// </summary>
private const bool PrecreateRequestDefault = false;
#endregion
#region View state keys
/// <summary>
/// The key under which the value for the <see cref="Text"/> property will be stored.
/// </summary>
private const string TextViewStateKey = "Text";
/// <summary>
/// The key under which the value for the <see cref="ImageUrl"/> property will be stored.
/// </summary>
private const string ImageUrlViewStateKey = "ImageUrl";
/// <summary>
/// The key under which the value for the <see cref="PrecreateRequest"/> property will be stored.
/// </summary>
private const string PrecreateRequestViewStateKey = "PrecreateRequest";
#endregion
/// <summary>
/// Stores the asynchronously created message that can be used to initiate a redirection-based authentication request.
/// </summary>
private HttpResponseMessage authenticationRequestRedirect;
/// <summary>
/// Initializes a new instance of the <see cref="OpenIdButton"/> class.
/// </summary>
public OpenIdButton() {
}
/// <summary>
/// Gets or sets the text to display for the link.
/// </summary>
[Bindable(true), DefaultValue(TextDefault), Category(AppearanceCategory)]
[Description("The text to display for the link.")]
public string Text {
get { return (string)ViewState[TextViewStateKey] ?? TextDefault; }
set { ViewState[TextViewStateKey] = value; }
}
/// <summary>
/// Gets or sets the image to display.
/// </summary>
[SuppressMessage("Microsoft.Design", "CA1056:UriPropertiesShouldNotBeStrings", Justification = "Bindable property must be simple type")]
[Bindable(true), Category(AppearanceCategory)]
[Description("The image to display.")]
[UrlProperty, Editor("System.Web.UI.Design.UrlEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
public string ImageUrl {
get {
return (string)ViewState[ImageUrlViewStateKey];
}
set {
UriUtil.ValidateResolvableUrl(Page, DesignMode, value);
ViewState[ImageUrlViewStateKey] = value;
}
}
/// <summary>
/// Gets or sets a value indicating whether to pre-discover the identifier so
/// the user agent has an immediate redirect.
/// </summary>
[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Precreate", Justification = "Breaking change to public API")]
[Bindable(true), Category(OpenIdCategory), DefaultValue(PrecreateRequestDefault)]
[Description("Whether to pre-discover the identifier so the user agent has an immediate redirect.")]
public bool PrecreateRequest {
get { return (bool)(ViewState[PrecreateRequestViewStateKey] ?? PrecreateRequestDefault); }
set { ViewState[PrecreateRequestViewStateKey] = value; }
}
/// <summary>
/// Gets or sets a value indicating when to use a popup window to complete the login experience.
/// </summary>
/// <value>The default value is <see cref="PopupBehavior.Never"/>.</value>
[Bindable(false), Browsable(false)]
public override PopupBehavior Popup {
get { return base.Popup; }
set { ErrorUtilities.VerifySupported(value == base.Popup, OpenIdStrings.PropertyValueNotSupported); }
}
/// <summary>
/// When implemented by a class, enables a server control to process an event raised when a form is posted to the server.
/// </summary>
/// <param name="eventArgument">A <see cref="T:System.String"/> that represents an optional event argument to be passed to the event handler.</param>
protected override void RaisePostBackEvent(string eventArgument) {
if (!this.PrecreateRequest) {
this.Page.RegisterAsyncTask(new PageAsyncTask(async ct => {
try {
var requests = await this.CreateRequestsAsync(ct);
var request = requests.First();
await request.RedirectToProviderAsync(new HttpContextWrapper(this.Context), ct);
} catch (InvalidOperationException ex) {
throw ErrorUtilities.Wrap(ex, OpenIdStrings.OpenIdEndpointNotFound);
}
}));
}
}
/// <summary>
/// Raises the <see cref="E:System.Web.UI.Control.PreRender"/> event.
/// </summary>
/// <param name="e">An <see cref="T:System.EventArgs"/> object that contains the event data.</param>
protected override void OnPreRender(EventArgs e) {
base.OnPreRender(e);
if (!this.DesignMode) {
ErrorUtilities.VerifyOperation(this.Identifier != null, OpenIdStrings.NoIdentifierSet);
if (this.PrecreateRequest) {
this.Page.RegisterAsyncTask(
new PageAsyncTask(
async ct => {
var requests = await this.CreateRequestsAsync(ct);
this.authenticationRequestRedirect = await requests.FirstOrDefault().GetRedirectingResponseAsync(ct);
}));
}
}
}
/// <summary>
/// Sends server control content to a provided <see cref="T:System.Web.UI.HtmlTextWriter"/> object, which writes the content to be rendered on the client.
/// </summary>
/// <param name="writer">The <see cref="T:System.Web.UI.HtmlTextWriter"/> object that receives the server control content.</param>
[SuppressMessage("Microsoft.Globalization", "CA1303:Do not pass literals as localized parameters", MessageId = "System.Web.UI.HtmlTextWriter.WriteEncodedText(System.String)", Justification = "Not localizable")]
protected override void Render(HtmlTextWriter writer) {
if (string.IsNullOrEmpty(this.Identifier)) {
writer.WriteEncodedText(string.Format(CultureInfo.CurrentCulture, "[{0}]", OpenIdStrings.NoIdentifierSet));
} else {
string tooltip = this.Text;
if (this.PrecreateRequest && !this.DesignMode) {
if (this.authenticationRequestRedirect != null) {
this.RenderOpenIdMessageTransmissionAsAnchorAttributes(writer, this.authenticationRequestRedirect, tooltip);
} else {
tooltip = OpenIdStrings.OpenIdEndpointNotFound;
}
} else {
writer.AddAttribute(HtmlTextWriterAttribute.Href, this.Page.ClientScript.GetPostBackClientHyperlink(this, null));
}
writer.AddAttribute(HtmlTextWriterAttribute.Title, tooltip);
writer.RenderBeginTag(HtmlTextWriterTag.A);
if (!string.IsNullOrEmpty(this.ImageUrl)) {
writer.AddAttribute(HtmlTextWriterAttribute.Src, this.ResolveClientUrl(this.ImageUrl));
writer.AddAttribute(HtmlTextWriterAttribute.Border, "0");
writer.AddAttribute(HtmlTextWriterAttribute.Alt, this.Text);
writer.AddAttribute(HtmlTextWriterAttribute.Title, this.Text);
writer.RenderBeginTag(HtmlTextWriterTag.Img);
writer.RenderEndTag();
} else if (!string.IsNullOrEmpty(this.Text)) {
writer.WriteEncodedText(this.Text);
}
writer.RenderEndTag();
}
}
}
}
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