تولید تصاویر از متن با C# و Open AI DALL-E

dotnet add Microsoft.Extensions.Http

👇 these are for loading configuration from JSON files
dotnet add Microsoft.Extensions.Configuration
dotnet add Microsoft.Extensions.Configuration.Json

👇 this is optional
dotnet add Microsoft.Extensions.Configuration.UserSecrets

namespace ConsoleAppOpenAI.DALL_E.HttpServices;

public interface IOpenAIProxy
{
    //👇 Send the Prompt Text with and return a list of image URLs
    Task<GenerateImageResponse> GenerateImages(
        GenerateImageRequest prompt, 
        CancellationToken cancellation = default);

    //👇 Download the Image as byte array
    Task<byte[]> DownloadImage(string url);
}

namespace ConsoleAppOpenAI.DALL_E.HttpServices
{
    public record class GenerateImageRequest(
        string Prompt, 
        int N, 
        string Size);

    public record class GenerateImageResponse(
        long Created, 
        GeneratedImageData[] Data);

    public record class GeneratedImageData(string Url);
}

{
  "OpenAi": {

    "OrganizationId": "{Subscription Id goes here}",
    "ApiKey": "{API Key goes here}",

    "Url": "https://api.openai.com",
    "DALL-E": {
      "Size": "1024x1024",
      "N": 1
    }
  }
}

using ConsoleAppOpenAI.DALL_E.HttpServices;
using Microsoft.Extensions.Configuration;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using System.Text.Json;

namespace ConsoleAppOpenAI.DALL_E.Services;

public class OpenAIHttpService : IOpenAIProxy
{
    readonly HttpClient _httpClient;

    readonly string _subscriptionId;

    readonly string _apiKey;

    public OpenAIHttpService(IConfiguration configuration)
    {
        //👇 reading settings from the configuration file
        var openApiUrl = configuration["OpenAi:Url"] ?? throw new ArgumentException(nameof(configuration));
        _httpClient = new HttpClient { BaseAddress = new Uri(openApiUrl) };

        _subscriptionId = configuration["OpenAi:SubscriptionId"];
        _apiKey = configuration["OpenAi:ApiKey"];
    }

    public async Task<GenerateImageResponse> GenerateImages(GenerateImageRequest prompt, CancellationToken cancellation = default)
    {
        throw new NotImplementedException();
    }

    public async Task<byte[]> DownloadImage(string url)
    {
        throw new NotImplementedException();
    }
}

public async Task<GenerateImageResponse> GenerateImages(GenerateImageRequest prompt, CancellationToken cancellation = default)
{
    using var rq = new HttpRequestMessage(HttpMethod.Post, "/v1/images/generations");

    var jsonRequest = JsonSerializer.Serialize(prompt, new JsonSerializerOptions
    {
        PropertyNamingPolicy = JsonNamingPolicy.CamelCase
    });

    //serialize the content to JSON and set the correct content type
    rq.Content = new StringContent(jsonRequest);
    rq.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

    //👇 Including the Authorization Header with API Key
    var apiKey = _apiKey;
    rq.Headers.Authorization = new AuthenticationHeaderValue("Bearer", apiKey);

    //👇 Including the Subscription Id Header
    var subscriptionId = _subscriptionId;
    rq.Headers.TryAddWithoutValidation("OpenAI-Organization", subscriptionId);

    var response = await _httpClient.SendAsync(rq, HttpCompletionOption.ResponseHeadersRead, cancellation);

    response.EnsureSuccessStatusCode();

    var content = response.Content;

    var jsonResponse = await content.ReadFromJsonAsync<GenerateImageResponse>(cancellationToken: cancellation);

    return jsonResponse;
}

public async Task<byte[]> DownloadImage(string url)
{
    var buffer = await _httpClient.GetByteArrayAsync(url);

    return buffer;
}

using ConsoleAppOpenAI.DALL_E.HttpServices;
using ConsoleAppOpenAI.DALL_E.Services;
using Microsoft.Extensions.Configuration;
using System.Reflection;

Console.WriteLine("Starting commandline for DALL-E [Open AI]");

var config = BuildConfig();

IOpenAIProxy aiClient = new OpenAIHttpService(config);

Console.WriteLine("Type your first Prompt");
var msg = Console.ReadLine();

var nImages = int.Parse(config["OpenAi:DALL-E:N"]);
var imageSize = config["OpenAi:DALL-E:Size"];
var prompt = new GenerateImageRequest(msg, nImages, imageSize);

var result = await aiClient.GenerateImages(prompt);

foreach (var item in result.Data)
{
    Console.WriteLine(item.Url);

    var fullPath = Path.Combine(Directory.GetCurrentDirectory(), $"{Guid.NewGuid()}.png");
    var img = await aiClient.DownloadImage(item.Url);

    await File.WriteAllBytesAsync(fullPath, img);

    Console.WriteLine("New image saved at {0}", fullPath);
}

Console.WriteLine("Press any key to exit");
Console.ReadKey();

static IConfiguration BuildConfig()
{
    var dir = Directory.GetCurrentDirectory();
    var configBuilder = new ConfigurationBuilder()
        .AddJsonFile(Path.Combine(dir, "appsettings.json"), optional: false)
        .AddUserSecrets(Assembly.GetExecutingAssembly());

    return configBuilder.Build();
}

Prompt: Wide and green garden with a lot of flowers, with sunflowers, and a small dog running around