azureazure-search-.net-sdkazure-migrate

Is there an alternative for DelegatingHandler in Azure.Search.Documents.SearchClient?


I've decided to migrate from Microsoft.Azure.Search 3.0.5 to Azure.Search.Documents, I've done everything according to a migration guide, but I couldn't find an alternative for DelegatingHandler in SeachClient ctor.

Previously I initialized SearchIndexClient with DelegatingHandler as a parameter to handle any errors, but the new Azure.Search.Documents.SearchClient doesn't accept DelegatingHandler[] as a parameter, what is an alternative way to do that?

Platform: .Net framework

What I Tried: I tried to use different versions of Azure.Documents.Search and asked Azure team - https://github.com/MicrosoftDocs/azure-docs/issues/117377


Solution

  • Creating a custom HttpClient with a custom HttpClientHandler and using it for HTTP operations outside the SearchClient.

    using System;
    using System.Net.Http;
    using Azure;
    using Azure.Search.Documents;
    using Azure.Search.Documents.Indexes.Models;
    
    class Program
    {
        static void Main()
        {
            // Your search service endpoint and API key
            string searchServiceEndpoint = "https://your-search-service-name.search.windows.net";
            string apiKey = "your-search-service-api-key";
    
            // Create a custom HttpClient with a custom handler
            HttpClient customHttpClient = CreateCustomHttpClient();
    
            // Create a SearchClient using the custom HttpClient
            SearchClient searchClient = new SearchClient(new Uri(searchServiceEndpoint), "your-index-name", new SearchApiKeyCredential(apiKey), new SearchClientOptions
            {
                Transport = new HttpClientTransport(customHttpClient)
            });
    
            // Now you can use the searchClient for various search operations
    
            // Example: Query documents
            SearchResults<MyDocumentModel> results = searchClient.Search<MyDocumentModel>("your search query");
    
            // Process search results
            foreach (SearchResult<MyDocumentModel> result in results.GetResults())
            {
                Console.WriteLine($"Document ID: {result.Document.Id}");
                // Process other document fields as needed
            }
    
            Console.WriteLine("Search completed successfully.");
        }
    
        // Create a custom HttpClient with a custom handler
        static HttpClient CreateCustomHttpClient()
        {
            var handler = new YourCustomHttpClientHandler(); // Replace with your custom handler
            return new HttpClient(handler);
        }
    }
    
    // Implement your custom HttpClientHandler
    class YourCustomHttpClientHandler : HttpClientHandler
    {
        protected override HttpResponseMessage Send(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
        {
            // Implement your custom logic here
            // You can inspect the request, handle errors, etc.
    
            // Call the base Send method to continue with the request
            return base.Send(request, cancellationToken);
        }
    }
    
    // Define your document model
    public class MyDocumentModel
    {
        public string Id { get; set; }
        // Add other properties based on your document structure
    }
    

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