Fix SignalR functions extensions sample (#310)

1. The recommended way to serve static content in function apps is to use "site/wwwroot" directory. However, it doesn't work locally. Update code to make reading static html file work both on Azure and locally.
2. Fix negotiation function error

Author: Y-Sindo

samples/DotnetIsolated-BidirectionChat/DotnetIsolated-BidirectionChat.csproj

@@ -1,15 +1,15 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <AzureFunctionsVersion>v4</AzureFunctionsVersion>
     <OutputType>Exe</OutputType>
     <RootNamespace>IsolatedModel_BidirectionChat</RootNamespace>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.0.12" />
-    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.SignalRService" Version="1.7.0" />
-    <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="1.3.0" OutputItemType="Analyzer" />
-    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="1.5.2" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.3.0" />
+     <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.SignalRService" Version="1.15.0" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.0.1" OutputItemType="Analyzer" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.0.0" />
   </ItemGroup>
   <ItemGroup>
     <None Update="host.json">

samples/DotnetIsolated-BidirectionChat/Functions.cs

@@ -1,3 +1,4 @@
+using System;
 using System.IO;
 using System.Net;
 using Microsoft.Azure.Functions.Worker;
@@ -19,7 +20,28 @@ public Functions(ILoggerFactory loggerFactory)
         public HttpResponseData GetWebPage([HttpTrigger(AuthorizationLevel.Anonymous)] HttpRequestData req)
         {
             var response = req.CreateResponse(HttpStatusCode.OK);
-            response.WriteString(File.ReadAllText("content/index.html"));
+            string content;
+            string home = Environment.GetEnvironmentVariable("HOME");
+            if (!string.IsNullOrEmpty(home))
+            {
+                string htmlFilePath = Path.Combine(home, "site", "wwwroot", "content", "index.html");
+                if (File.Exists(htmlFilePath))
+                {
+                    // When running on Azure
+                    content = File.ReadAllText(htmlFilePath);
+                }
+                else
+                {
+                    // Assume the function is running locally with function core tools
+                    content = File.ReadAllText("content/index.html");
+                }
+            }
+            else
+            {
+                // Assume the function is running locally with function core tools
+                content = File.ReadAllText("content/index.html");
+            }
+            response.WriteString(content);
             response.Headers.Add("Content-Type", "text/html");
             return response;
         }

samples/DotnetIsolated-BidirectionChat/content/index.html

@@ -165,9 +165,6 @@ <h3>Serverless chat</h3>
                 throw "No username entered";
             }
             getConnectionInfo().then(info => {
-                // make compatible with old and new SignalRConnectionInfo
-                info.accessToken = info.AccessToken || info.accessKey; // pay attention to the case
-                info.url = info.Url || info.endpoint; // pay attention to the case
                 data.ready = true;
                 const options = {
                     accessTokenFactory: () => info.accessToken

samples/DotnetIsolated-ClassBased/Functions.cs

@@ -22,13 +22,31 @@ public Functions(IServiceProvider serviceProvider, ILogger<Functions> logger) :
         public HttpResponseData GetWebPage([HttpTrigger(AuthorizationLevel.Anonymous)] HttpRequestData req)
         {
             var response = req.CreateResponse(HttpStatusCode.OK);
+            string content;
             string home = Environment.GetEnvironmentVariable("HOME");
-            string htmlFilePath = Path.Combine(home, "site", "wwwroot", "content", "index.html");
-            response.WriteString(File.ReadAllText(htmlFilePath));
+            if (!string.IsNullOrEmpty(home))
+            {
+                string htmlFilePath = Path.Combine(home, "site", "wwwroot", "content", "index.html");
+                if (File.Exists(htmlFilePath))
+                {
+                    // When running on Azure
+                    content = File.ReadAllText(htmlFilePath);
+                }
+                else
+                {
+                    // Assume the function is running locally with function core tools
+                    content = File.ReadAllText("content/index.html");
+                }
+            }
+            else
+            {
+                // Assume the function is running locally with function core tools
+                content = File.ReadAllText("content/index.html");
+            }
+            response.WriteString(content);
             response.Headers.Add("Content-Type", "text/html");
             return response;
         }
-
         [Function("negotiate")]
         public async Task<HttpResponseData> Negotiate([HttpTrigger(AuthorizationLevel.Anonymous, "post")] HttpRequestData req)
         {