Adding option to use private PAT token on GitHub Q&A sample

dotnet/src/Skills/Skills.Web/WebFileDownloadSkill.cs

@@ -4,6 +4,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Net.Http;
+using System.Net.Http.Headers;
 using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;
@@ -27,6 +28,11 @@ public static class Parameters
         /// Where to save file.
         /// </summary>
         public const string FilePath = "filePath";
+
+        /// <summary>
+        /// Default headers for the download requests
+        /// </summary>
+        public const string DefaultHttpHeaders = "defaultHttpHeaders";
     }
 
     private readonly ILogger _logger;
@@ -44,6 +50,19 @@ public WebFileDownloadSkill(ILogger<WebFileDownloadSkill>? logger = null)
         this._httpClient = new HttpClient(this._httpClientHandler);
     }
 
+    public async Task DownloadToFileAsync(string source, IDictionary<string, string> headers, SKContext context)
+    {
+        this._httpClient.DefaultRequestHeaders.Clear();
+
+        foreach (var header in headers)
+        {
+            this._httpClient.DefaultRequestHeaders.Add(header.Key, header.Value);
+        }
+
+        await this.DownloadToFileAsync(source, context).ConfigureAwait(false);
+        this._httpClient.DefaultRequestHeaders.Clear();
+    }
+
     /// <summary>
     /// Downloads a file to a local file path.
     /// </summary>

samples/apps/github-qna-webapp-react/src/App.tsx

@@ -40,6 +40,7 @@ const App: FC = () => {
     const [selectedTabValue, setSelectedTabValue] = useState<string>('completion');
     const [project, setProject] = useState<string>('');
     const [branch, setBranch] = useState<string>('');
+    const [repoToken, setRepoToken] = useState<string>('');
 
     useEffect(() => {
         changeAppState(appState);

samples/apps/github-qna-webapp-react/src/components/GitHubRepoSelection.tsx

@@ -26,6 +26,7 @@ const enum DownloadState {
 const GitHubProjectSelection: FC<IData> = ({ uri, keyConfig, prevProject, prevBranch, onLoadProject, onBack }) => {
     const [project, setProject] = useState<string>(prevProject);
     const [branch, setBranch] = useState<string>(prevBranch);
+    const [patToken, setToken] = useState<string>('');
     const [downloadState, setDownloadState] = useState<DownloadState>(DownloadState.Setup);
     const sk = useSemanticKernel(uri);
 
@@ -42,6 +43,7 @@ const GitHubProjectSelection: FC<IData> = ({ uri, keyConfig, prevProject, prevBr
                     value: project || '',
                     inputs: [
                         { key: 'repositoryBranch', value: branch || '' },
+                        { key: 'patToken', value: patToken || '' },
                         { key: 'searchPattern', value: '*.md' },
                     ],
                 },
@@ -98,6 +100,20 @@ const GitHubProjectSelection: FC<IData> = ({ uri, keyConfig, prevProject, prevBr
                     placeholder="https://github.com/microsoft/semantic-kernel"
                 />
             </div>
+            <Label>
+                <strong>GitHub PAT Token (optional)</strong>
+            </Label>
+            <div style={{ display: 'flex', flexDirection: 'row', gap: 10 }}>
+                <Input
+                    style={{ width: '100%' }}
+                    type="password"
+                    value={patToken}
+                    onChange={(e) => {
+                        setToken(e.target.value);
+                    }}
+                    placeholder=""
+                />
+            </div>
             <Label>
                 <strong>Branch Name</strong>
             </Label>

samples/dotnet/github-skills/GitHubSkill.cs

@@ -12,7 +12,6 @@
 using Microsoft.SemanticKernel.Orchestration;
 using Microsoft.SemanticKernel.SkillDefinition;
 using Microsoft.SemanticKernel.Skills.Web;
-using Microsoft.SemanticKernel.Text;
 
 namespace GitHubSkills;
 
@@ -37,6 +36,11 @@ public static class Parameters
         /// </summary>
         public const string SearchPattern = "searchPattern";
 
+        /// <summary>
+        /// Personal access token for private repositories.
+        /// </summary>
+        public const string PatToken = "patToken";
+
         /// <summary>
         /// Document file path.
         /// </summary>
@@ -132,9 +136,30 @@ public async Task SummarizeRepositoryAsync(string source, SKContext context)
         try
         {
             var repositoryUri = source.Trim(new char[] { ' ', '/' });
-            var context1 = new SKContext(new ContextVariables(), NullMemory.Instance, null, context.Log);
-            context1.Variables.Set(Parameters.FilePath, filePath);
-            await this._downloadSkill.DownloadToFileAsync($"{repositoryUri}/archive/refs/heads/{repositoryBranch}.zip", context1);
+            var downloadSkillContext = new SKContext(new ContextVariables(), NullMemory.Instance, null, context.Log);
+            downloadSkillContext.Variables.Set(Parameters.FilePath, filePath);
+
+            var repoBundle = $"{repositoryUri}/archive/refs/heads/{repositoryBranch}.zip";
+
+            this._logger.LogDebug("Downloading {repoBundle}", repoBundle);
+
+            if (context.Variables.Get(Parameters.PatToken, out string patToken))
+            {
+                this._logger.LogDebug($"PAT detected, adding authorization headers");
+
+                // If variables would be a dictionary of object we could probably pass headers,
+                // we can also serialize it to string...
+                var headers = new Dictionary<string, string>()
+                {
+                    { "Authorization", $"token {patToken}" }
+                };
+
+                await this._downloadSkill.DownloadToFileAsync(repoBundle, headers, downloadSkillContext);
+            }
+            else
+            {
+                await this._downloadSkill.DownloadToFileAsync(repoBundle, downloadSkillContext);
+            }
 
             ZipFile.ExtractToDirectory(filePath, directoryPath);