Neuron®
The Neuron® is the basis for the creation of open and secure federated networks for smart societies.
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PublicTokenHistoryView.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.IoTGateway.ScriptExtensions.Constants;
9using Waher.Networking.HTTP;
10
11namespace Waher.Service.IoTBroker.NeuroFeatures.WebServices
12{
16 public class PublicTokenHistoryView : HttpSynchronousResource, IHttpGetMethod
17 {
18 private readonly Dictionary<string, TaskCompletionSource<string>> renderings = new Dictionary<string, TaskCompletionSource<string>>();
19
23 public PublicTokenHistoryView()
24 : base("/NFH")
25 {
26 }
27
28 public override bool HandlesSubPaths => true;
29 public override bool UserSessions => true;
30 public bool AllowsGET => true;
31
32 public override HttpAuthenticationScheme[] GetAuthenticationSchemes(HttpRequest Request) => null;
33
34 public async Task GET(HttpRequest Request, HttpResponse Response)
35 {
36 if (string.IsNullOrEmpty(Request.SubPath))
37 {
38 await Response.SendResponse(new BadRequestException("Missing Token ID."));
39 return;
40 }
41
42 string TokenId = Request.SubPath[1..];
43 int i = TokenId.IndexOf('@');
44 if (i < 0 || !Guid.TryParse(TokenId[..i], out _))
45 {
46 await Response.SendResponse(new BadRequestException("Invalid Token ID."));
47 return;
48 }
49
50 Token Token = await NeuroFeaturesProcessor.GetToken(TokenId, true);
51 if (Token is null)
52 {
53 await Response.SendResponse(new NotFoundException("Token '" + TokenId + "' not found on this neuron."));
54 return;
55 }
56
57 if (!Token.IsPublic)
58 {
59 await Response.SendResponse(new ForbiddenException("Token not publicly accissible via the web."));
60 return;
61 }
62
63 if (!Token.HasStateMachine)
64 {
65 await Response.SendResponse(new BadRequestException("Token does not have an associated state-machine."));
66 return;
67 }
68
69 TaskCompletionSource<string> Pending;
70 bool WaitPending;
71 string Result;
72
73 lock (this.renderings)
74 {
75 if (this.renderings.TryGetValue(TokenId, out Pending))
76 WaitPending = true;
77 else
78 {
79 WaitPending = false;
80 Pending = new TaskCompletionSource<string>();
81 this.renderings[TokenId] = Pending;
82 }
83 }
84
85 try
86 {
87 if (WaitPending)
88 Result = await Pending.Task;
89 else
90 {
91 StringBuilder Html = new StringBuilder();
92 string s;
93
94 MarkdownDocument Doc = await MarkdownDocument.CreateAsync(Token.Description);
95 string Description = await Doc.GeneratePlainText();
96
97 Html.AppendLine("<!DOCTYPE html>");
98 Html.AppendLine("<html itemscope itemtype=\"http://schema.org/WebPage\">");
99 Html.AppendLine("<head>");
100 Html.Append("<title>");
101 Html.Append(XML.HtmlValueEncode(Token.FriendlyName));
102 Html.AppendLine("</title>");
103 Html.Append("<meta name=\"twitter:title\" content=\"");
104 Html.Append(s = XML.HtmlAttributeEncode(Token.FriendlyName));
105 Html.AppendLine("\"/>");
106 Html.Append("<meta name=\"og:title\" content=\"");
107 Html.Append(s);
108 Html.AppendLine("\"/>");
109 Html.Append("<meta itemprop=\"description\" content=\"");
110 Html.Append(s = XML.HtmlAttributeEncode(Description));
111 Html.AppendLine("\"/>");
112 Html.Append("<meta name=\"twitter:description\" content=\"");
113 Html.Append(s);
114 Html.AppendLine("\"/>");
115 Html.Append("<meta name=\"og:description\" content=\"");
116 Html.Append(s);
117 Html.AppendLine("\"/>");
118 Html.Append("<meta name=\"description\" content=\"");
119 Html.Append(s);
120 Html.Append(" Author: ");
121 Html.Append(s = MarkdownDocument.Encode(Token.Creator.Value));
122 Html.Append(", Date: ");
123 Html.Append(XML.Encode(Token.Created, true));
124 Html.AppendLine("\"/>");
125 Html.AppendLine("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"/>");
126 Html.Append("<meta name=\"author\" content=\"");
127 Html.Append(s);
128 Html.AppendLine("\"/>");
129 Html.AppendLine("<link rel=\"shortcut icon\" href=\"/favicon.ico\"/>");
130 Html.Append("<link rel=\"stylesheet\" href=\"");
131 Html.Append(XML.HtmlAttributeEncode(Theme.CurrentTheme.CSSX));
132 Html.AppendLine("\"/>");
133 Html.AppendLine("<script type=\"application/javascript\" src=\"/Events.js\"></script>");
134 Html.AppendLine("<script type=\"text/javascript\">");
135 Html.AppendLine("function UpdatePresent(Data) { document.getElementById('Present').innerHTML=Data; }");
136 Html.AppendLine("</script>");
137 Html.AppendLine("</head>");
138 Html.AppendLine("<body>");
139 Html.AppendLine("<main>");
140 Html.AppendLine("<section id='Present'>");
141
142 Html.AppendLine(await Token.GeneratePresentReport(ReportFormat.Html));
143
144 Html.AppendLine("</section>");
145 Html.AppendLine("<section id='History'>");
146
147 Html.AppendLine(await Token.GenerateHistoryReport(ReportFormat.Html));
148
149 Html.AppendLine("</section>");
150 Html.AppendLine("</main>");
151 Html.AppendLine("</body>");
152 Html.AppendLine("</html>");
153
154 Result = Html.ToString();
155 Pending.TrySetResult(Result);
156 }
157 }
158 catch (Exception ex)
159 {
160 if (WaitPending)
161 Pending.TrySetException(ex);
162
163 await Response.SendResponse(ex);
164 return;
165 }
166 finally
167 {
168 if (!WaitPending)
169 {
170 lock (this.renderings)
171 {
172 this.renderings.Remove(TokenId);
173 }
174 }
175 }
176
177 Response.ContentType = HtmlCodec.DefaultContentType;
178 Response.SetHeader("Cache-Control", "max-age=0, no-cache, no-store");
179
180 await Response.Write(Result);
181 await Response.SendResponse();
182 }
183 }
184}
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.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.GenerateHistoryReport
Task< string > GenerateHistoryReport()
Generates a history report for the token, if the token is associated with a state-machine,...
Definition: Token.cs:1486
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.PublicTokenHistoryView.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.PublicTokenHistoryView.GET
async Task GET(HttpRequest Request, HttpResponse Response)
Executes the GET method on the resource.
Definition: PublicTokenHistoryView.cs:34
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