Neuron®
The Neuron® is the basis for the creation of open and secure federated networks for smart societies.
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PublicTokenView.cs
1using System;
2using System.Collections.Generic;
3using System.Text;
4using System.Threading.Tasks;
5using Waher.Content.Html;
6using Waher.Content.Markdown;
7using Waher.Content.Xml;
8using Waher.Events;
9using Waher.IoTGateway;
10using Waher.IoTGateway.ScriptExtensions.Constants;
11using Waher.Networking.HTTP;
12
13namespace Waher.Service.IoTBroker.NeuroFeatures.WebServices
14{
18 public class PublicTokenView : HttpSynchronousResource, IHttpGetMethod
19 {
20 private readonly Dictionary<string, TaskCompletionSource<string>> renderings = new Dictionary<string, TaskCompletionSource<string>>();
21
25 public PublicTokenView()
26 : base("/NF")
27 {
28 }
29
30 public override bool HandlesSubPaths => true;
31 public override bool UserSessions => true;
32 public bool AllowsGET => true;
33
34 public override HttpAuthenticationScheme[] GetAuthenticationSchemes(HttpRequest Request) => null;
35
36 public async Task GET(HttpRequest Request, HttpResponse Response)
37 {
38 if (string.IsNullOrEmpty(Request.SubPath))
39 {
40 await Response.SendResponse(new BadRequestException("Missing Token ID."));
41 return;
42 }
43
44 string TokenId = Request.SubPath[1..];
45 int i = TokenId.IndexOf('@');
46 if (i < 0 || !Guid.TryParse(TokenId[..i], out _))
47 {
48 await Response.SendResponse(new BadRequestException("Invalid Token ID."));
49 return;
50 }
51
52 Token Token = await NeuroFeaturesProcessor.GetToken(TokenId, true);
53 if (Token is null)
54 {
55 await Response.SendResponse(new NotFoundException("Token '" + TokenId + "' not found on this neuron."));
56 return;
57 }
58
59 if (!Token.IsPublic)
60 {
61 await Response.SendResponse(new ForbiddenException("Token not publicly accissible via the web."));
62 return;
63 }
64
65 if (!Token.HasStateMachine)
66 {
67 await Response.SendResponse(new BadRequestException("Token does not have an associated state-machine."));
68 return;
69 }
70
71 TaskCompletionSource<string> Pending;
72 bool WaitPending;
73 string Result;
74
75 lock (this.renderings)
76 {
77 if (this.renderings.TryGetValue(TokenId, out Pending))
78 WaitPending = true;
79 else
80 {
81 WaitPending = false;
82 Pending = new TaskCompletionSource<string>();
83 this.renderings[TokenId] = Pending;
84 }
85 }
86
87 try
88 {
89 if (WaitPending)
90 Result = await Pending.Task;
91 else
92 {
93 StringBuilder Html = new StringBuilder();
94 string s;
95
96 MarkdownDocument Doc = await MarkdownDocument.CreateAsync(Token.Description);
97 string Description = await Doc.GeneratePlainText();
98
99 Html.AppendLine("<!DOCTYPE html>");
100 Html.AppendLine("<html itemscope itemtype=\"http://schema.org/WebPage\">");
101 Html.AppendLine("<head>");
102 Html.Append("<title>");
103 Html.Append(XML.HtmlValueEncode(Token.FriendlyName));
104 Html.AppendLine("</title>");
105 Html.Append("<meta name=\"twitter:title\" content=\"");
106 Html.Append(s = XML.HtmlAttributeEncode(Token.FriendlyName));
107 Html.AppendLine("\"/>");
108 Html.Append("<meta name=\"og:title\" content=\"");
109 Html.Append(s);
110 Html.AppendLine("\"/>");
111 Html.Append("<meta itemprop=\"description\" content=\"");
112 Html.Append(s = XML.HtmlAttributeEncode(Description));
113 Html.AppendLine("\"/>");
114 Html.Append("<meta name=\"twitter:description\" content=\"");
115 Html.Append(s);
116 Html.AppendLine("\"/>");
117 Html.Append("<meta name=\"og:description\" content=\"");
118 Html.Append(s);
119 Html.AppendLine("\"/>");
120 Html.Append("<meta name=\"description\" content=\"");
121 Html.Append(s);
122 Html.Append(" Author: ");
123 Html.Append(s = MarkdownDocument.Encode(Token.Creator.Value));
124 Html.Append(", Date: ");
125 Html.Append(XML.Encode(Token.Created, true));
126 Html.AppendLine("\"/>");
127 Html.AppendLine("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"/>");
128 Html.Append("<meta name=\"author\" content=\"");
129 Html.Append(s);
130 Html.AppendLine("\"/>");
131 Html.AppendLine("<link rel=\"shortcut icon\" href=\"/favicon.ico\"/>");
132 Html.Append("<link rel=\"stylesheet\" href=\"");
133 Html.Append(XML.HtmlAttributeEncode(Theme.CurrentTheme.CSSX));
134 Html.AppendLine("\"/>");
135 Html.AppendLine("<script type=\"application/javascript\" src=\"/Events.js\"></script>");
136 Html.AppendLine("<script type=\"text/javascript\">");
137 Html.AppendLine("function UpdatePresent(Data) { document.getElementById('Present').innerHTML=Data; }");
138 Html.AppendLine("</script>");
139 Html.AppendLine("</head>");
140 Html.AppendLine("<body>");
141 Html.AppendLine("<main>");
142 Html.AppendLine("<section id='Present'>");
143
144 Html.AppendLine(await Token.GeneratePresentReport(ReportFormat.Html));
145
146 Html.AppendLine("</section>");
147 Html.AppendLine("</main>");
148 Html.AppendLine("</body>");
149 Html.AppendLine("</html>");
150
151 Result = Html.ToString();
152 Pending.TrySetResult(Result);
153 }
154 }
155 catch (Exception ex)
156 {
157 if (WaitPending)
158 Pending.TrySetException(ex);
159
160 await Response.SendResponse(ex);
161 return;
162 }
163 finally
164 {
165 if (!WaitPending)
166 {
167 lock (this.renderings)
168 {
169 this.renderings.Remove(TokenId);
170 }
171 }
172 }
173
174 Response.ContentType = HtmlCodec.DefaultContentType;
175 Response.SetHeader("Cache-Control", "max-age=0, no-cache, no-store");
176
177 await Response.Write(Result);
178 await Response.SendResponse();
179 }
180
181 internal static async Task UpdatePresent(string[] TabIDs, Token Token)
182 {
183 try
184 {
185 string Html = await Token.GeneratePresentReport(ReportFormat.Html);
186 await ClientEvents.PushEvent(TabIDs, "UpdatePresent", Html, false);
187 }
188 catch (Exception ex)
189 {
190 Log.Exception(ex);
191 }
192 }
193 }
194}
Waher.Content.Html.HtmlCodec
HTML encoder/decoder.
Definition: HtmlCodec.cs:15
Waher.Content.Html.HtmlCodec.DefaultContentType
const string DefaultContentType
Default Content-Type for HTML: text/html
Definition: HtmlCodec.cs:26
Waher.Content.Markdown.MarkdownDocument
Contains a markdown document. This markdown document class supports original markdown,...
Definition: MarkdownDocument.cs:52
Waher.Content.Markdown.MarkdownDocument.Encode
static string Encode(string s)
Encodes all special characters in a string so that it can be included in a markdown document without ...
Definition: MarkdownDocument.cs:5926
Waher.Content.Markdown.MarkdownDocument.GeneratePlainText
async Task< string > GeneratePlainText()
Generates Plain Text from the markdown text.
Definition: MarkdownDocument.cs:5633
Waher.Content.Markdown.MarkdownDocument.CreateAsync
static Task< MarkdownDocument > CreateAsync(string MarkdownText, params Type[] TransparentExceptionTypes)
Contains a markdown document. This markdown document class supports original markdown,...
Definition: MarkdownDocument.cs:92
Waher.Content.Xml.XML
Helps with common XML-related tasks.
Definition: XML.cs:21
Waher.Content.Xml.XML.HtmlValueEncode
static string HtmlValueEncode(string s)
Differs from Encode(String), in that it does not encode the aposotrophe or the quote.
Definition: XML.cs:211
Waher.Content.Xml.XML.Encode
static string Encode(string s)
Encodes a string for use in XML.
Definition: XML.cs:29
Waher.Content.Xml.XML.HtmlAttributeEncode
static string HtmlAttributeEncode(string s)
Differs from Encode(String), in that it does not encode the aposotrophe.
Definition: XML.cs:121
Waher.Events.Log
Static class managing the application event log. Applications and services log events on this static ...
Definition: Log.cs:14
Waher.Events.Log.Exception
static void Exception(Exception Exception, string Object, string Actor, string EventId, EventLevel Level, string Facility, string Module, params KeyValuePair< string, object >[] Tags)
Logs an exception. Event type will be determined by the severity of the exception.
Definition: Log.cs:1657
Waher.IoTGateway.ClientEvents
The ClientEvents class allows applications to push information asynchronously to web clients connecte...
Definition: ClientEvents.cs:51
Waher.IoTGateway.ClientEvents.PushEvent
static Task< int > PushEvent(string[] TabIDs, string Type, object Data)
Puses an event to a set of Tabs, given their Tab IDs.
Definition: ClientEvents.cs:1397
Waher.IoTGateway.ScriptExtensions.Constants.Theme.CurrentTheme
static ThemeDefinition CurrentTheme
Current theme.
Definition: Theme.cs:90
Waher.Networking.HTTP.BadRequestException
The request could not be understood by the server due to malformed syntax. The client SHOULD NOT repe...
Definition: BadRequestException.cs:9
Waher.Networking.HTTP.ForbiddenException
The server understood the request, but is refusing to fulfill it. Authorization will not help and the...
Definition: ForbiddenException.cs:13
Waher.Networking.HTTP.HttpAuthenticationScheme
Base class for all HTTP authentication schemes, as defined in RFC-7235: https://datatracker....
Definition: HttpAuthenticationScheme.cs:12
Waher.Networking.HTTP.HttpRequest
Represents an HTTP request.
Definition: HttpRequest.cs:22
Waher.Networking.HTTP.HttpRequest.SubPath
string SubPath
Sub-path. If a resource is found handling the request, this property contains the trailing sub-path o...
Definition: HttpRequest.cs:194
Waher.Networking.HTTP.HttpResponse
Represets a response of an HTTP client request.
Definition: HttpResponse.cs:23
Waher.Networking.HTTP.HttpResponse.SendResponse
async Task SendResponse()
Sends the response back to the client. If the resource is synchronous, there's no need to call this m...
Definition: HttpResponse.cs:597
Waher.Networking.HTTP.HttpResponse.Write
Task Write(byte[] Data)
Returns binary data in the response.
Definition: HttpResponse.cs:1369
Waher.Networking.HTTP.HttpResponse.SetHeader
void SetHeader(string FieldName, string Value)
Sets a custom header field value.
Definition: HttpResponse.cs:259
Waher.Networking.HTTP.HttpSynchronousResource
Base class for all synchronous HTTP resources. A synchronous resource responds within the method hand...
Definition: HttpSynchronousResource.cs:8
Waher.Networking.HTTP.NotFoundException
The server has not found anything matching the Request-URI. No indication is given of whether the con...
Definition: NotFoundException.cs:9
Waher.Service.IoTBroker.NeuroFeatures.NeuroFeaturesProcessor
Marketplace processor, brokering sales of items via tenders and offers defined in smart contracts.
Definition: NeuroFeaturesProcessor.cs:48
Waher.Service.IoTBroker.NeuroFeatures.Token.GeneratePresentReport
Task< string > GeneratePresentReport()
Generates a present report for the token, if the token is associated with a state-machine,...
Definition: Token.cs:1463
Waher.Service.IoTBroker.NeuroFeatures.Token.HasStateMachine
bool HasStateMachine
If the token has an associated state-machine.
Definition: Token.cs:1345
Waher.Service.IoTBroker.NeuroFeatures.Token.IsPublic
bool IsPublic
If the token is public.
Definition: Token.cs:181
Waher.Service.IoTBroker.NeuroFeatures.Token.FriendlyName
string FriendlyName
A friendly name for the token.
Definition: Token.cs:512
Waher.Service.IoTBroker.NeuroFeatures.Token.Description
string Description
Description Markdown for the token.
Definition: Token.cs:531
Waher.Service.IoTBroker.NeuroFeatures.Token.Created
DateTime Created
When token was created.
Definition: Token.cs:384
Waher.Service.IoTBroker.NeuroFeatures.Token.Creator
CaseInsensitiveString Creator
Creator of token
Definition: Token.cs:189
Waher.Service.IoTBroker.NeuroFeatures.WebServices.PublicTokenView.GetAuthenticationSchemes
override HttpAuthenticationScheme[] GetAuthenticationSchemes(HttpRequest Request)
Any authentication schemes used to authenticate users before access is granted to the corresponding r...
Waher.Service.IoTBroker.NeuroFeatures.WebServices.PublicTokenView.GET
async Task GET(HttpRequest Request, HttpResponse Response)
Executes the GET method on the resource.
Definition: PublicTokenView.cs:36
Waher.Networking.HTTP.IHttpGetMethod
GET Interface for HTTP resources.
Definition: IHttpGetMethod.cs:9
_
Definition: ImplTypes.g.cs:58
Waher.Content.Html
Definition: CDATA.cs:6
Waher.Content.Markdown
Definition: ConsolidatedTable.cs:11
Waher.Content.Xml
Definition: Attribute.cs:7
Waher.Service.IoTBroker.NeuroFeatures.ReportFormat
ReportFormat
Desired report format
Definition: ReportFormat.cs:7