feat: support qwen long

README.md

@@ -62,7 +62,7 @@ public class YourService(IDashScopeClient client)
   - Image Synthesis - `CreateWanxImageSynthesisTaskAsync()` and `GetWanxImageSynthesisTaskAsync()`
   - Image Generation - `CreateWanxImageGenerationTaskAsync()` and `GetWanxImageGenerationTaskAsync()`
   - Background Image Generation - `CreateWanxBackgroundGenerationTaskAsync()` and `GetWanxBackgroundGenerationTaskAsync()`
-
+- File API that used by Qwen-Long - `dashScopeClient.UploadFileAsync()` and `dashScopeClient.DeleteFileAsync`
 
 # Examples
 
@@ -163,3 +163,35 @@ Console.WriteLine(completion.Output.Choice[0].Message.Content);
 ```
 
 Append the tool calling result with `tool` role, then model will generate answers based on tool calling result.
+
+
+## QWen-Long with files
+
+Upload file first.
+
+```csharp
+var file = new FileInfo("test.txt");
+var uploadedFile = await dashScopeClient.UploadFileAsync(file.OpenRead(), file.Name);
+```
+
+Using uploaded file id in messages.
+
+```csharp
+var history = new List<ChatMessage>
+{
+    new(uploadedFile.Id),   // use array for multiple files, e.g. [file1.Id, file2.Id]
+    new("user", "Summarize the content of file.")
+}
+var parameters = new TextGenerationParameters()
+{
+    ResultFormat = ResultFormats.Message
+};
+var completion = await client.GetQWenChatCompletionAsync(QWenLlm.QWenLong, history, parameters);
+Console.WriteLine(completion.Output.Choices[0].Message.Content);
+```
+
+Delete file if needed
+
+```csharp
+var deletionResult = await dashScopeClient.DeleteFileAsync(uploadedFile.Id);
+```

README.zh-Hans.md

@@ -62,6 +62,7 @@ public class YourService(IDashScopeClient client)
     - 文生图 - `CreateWanxImageSynthesisTaskAsync()` and `GetWanxImageSynthesisTaskAsync()`
     - 人像风格重绘 - `CreateWanxImageGenerationTaskAsync()` and `GetWanxImageGenerationTaskAsync()`
     - 图像背景生成 - `CreateWanxBackgroundGenerationTaskAsync()` and `GetWanxBackgroundGenerationTaskAsync()`
+- 适用于 QWen-Long 的文件 API `dashScopeClient.UploadFileAsync()` and `dashScopeClient.DeleteFileAsync`
 
 
 # 示例
@@ -159,3 +160,34 @@ Console.WriteLine(completion.Output.Choice[0].Message.Content) // 现在浙江
 ```
 
 当模型认为应当调用工具时，返回消息中 `ToolCalls` 会提供调用的详情，本地在调用完成后可以把结果以 `tool` 角色返回。
+
+## 上传文件（QWen-Long）
+
+需要先提前将文件上传到 DashScope 来获得 Id。
+
+```csharp
+var file = new FileInfo("test.txt");
+var uploadedFile = await dashScopeClient.UploadFileAsync(file.OpenRead(), file.Name);
+```
+
+使用文件 Id 初始化一个消息，内部会转换成 system 角色的一个文件引用。
+
+```csharp
+var history = new List<ChatMessage>
+{
+    new(uploadedFile.Id),   // 多文件情况下可以直接传入文件 Id 数组, 例如：[file1.Id, file2.Id]
+    new("user", "总结一下文件的内容。")
+}
+var parameters = new TextGenerationParameters()
+{
+    ResultFormat = ResultFormats.Message
+};
+var completion = await client.GetQWenChatCompletionAsync(QWenLlm.QWenLong, history, parameters);
+Console.WriteLine(completion.Output.Choices[0].Message.Content);
+```
+
+如果需要，完成对话后可以使用 API 删除之前上传的文件。
+
+```csharp
+var deletionResult = await dashScopeClient.DeleteFileAsync(uploadedFile.Id);
+```

sample/Cnblogs.DashScope.Sample/Cnblogs.DashScope.Sample.csproj

@@ -12,4 +12,10 @@
       <ProjectReference Include="..\..\src\Cnblogs.DashScope.Sdk\Cnblogs.DashScope.Sdk.csproj" />
     </ItemGroup>
 
+    <ItemGroup>
+      <None Update="test.txt">
+        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+      </None>
+    </ItemGroup>
+
 </Project>

sample/Cnblogs.DashScope.Sample/Program.cs

@@ -39,6 +39,9 @@
     case SampleType.ChatCompletionWithTool:
         await ChatWithToolsAsync();
         break;
+    case SampleType.ChatCompletionWithFiles:
+        await ChatWithFilesAsync();
+        break;
 }
 
 return;
@@ -97,6 +100,49 @@ async Task ChatStreamAsync()
     // ReSharper disable once FunctionNeverReturns
 }
 
+async Task ChatWithFilesAsync()
+{
+    var history = new List<ChatMessage>();
+    Console.WriteLine("uploading file \"test.txt\" ");
+    var file = new FileInfo("test.txt");
+    var uploadedFile = await dashScopeClient.UploadFileAsync(file.OpenRead(), file.Name);
+    Console.WriteLine("file uploaded, id: " + uploadedFile.Id);
+    Console.WriteLine();
+
+    var fileMessage = new ChatMessage(uploadedFile.Id);
+    history.Add(fileMessage);
+    Console.WriteLine("system > " + fileMessage.Content);
+    var userPrompt = new ChatMessage("user", "该文件的内容是什么");
+    history.Add(userPrompt);
+    Console.WriteLine("user > " + userPrompt.Content);
+    var stream = dashScopeClient.GetQWenChatStreamAsync(
+        QWenLlm.QWenLong,
+        history,
+        new TextGenerationParameters { IncrementalOutput = true, ResultFormat = ResultFormats.Message });
+    var role = string.Empty;
+    var message = new StringBuilder();
+    await foreach (var modelResponse in stream)
+    {
+        var chunk = modelResponse.Output.Choices![0];
+        if (string.IsNullOrEmpty(role) && string.IsNullOrEmpty(chunk.Message.Role) == false)
+        {
+            role = chunk.Message.Role;
+            Console.Write(chunk.Message.Role + " > ");
+        }
+
+        message.Append(chunk.Message.Content);
+        Console.Write(chunk.Message.Content);
+    }
+
+    Console.WriteLine();
+    history.Add(new ChatMessage(role, message.ToString()));
+
+    Console.WriteLine();
+    Console.WriteLine("Deleting file by id: " + uploadedFile.Id);
+    var result = await dashScopeClient.DeleteFileAsync(uploadedFile.Id);
+    Console.WriteLine("Deletion result: " + result.Deleted);
+}
+
 async Task ChatWithToolsAsync()
 {
     var history = new List<ChatMessage>();

sample/Cnblogs.DashScope.Sample/SampleType.cs

@@ -14,5 +14,8 @@ public enum SampleType
     ChatCompletion,
 
     [Description("Conversation with tools")]
-    ChatCompletionWithTool
+    ChatCompletionWithTool,
+
+    [Description("Conversation with files")]
+    ChatCompletionWithFiles
 }

sample/Cnblogs.DashScope.Sample/SampleTypeDescriptor.cs

@@ -10,6 +10,7 @@ public static string GetDescription(this SampleType sampleType)
             SampleType.TextCompletionSse => "Simple prompt completion with incremental output",
             SampleType.ChatCompletion => "Conversation between user and assistant",
             SampleType.ChatCompletionWithTool => "Function call sample",
+            SampleType.ChatCompletionWithFiles => "File upload sample using qwen-long",
             _ => throw new ArgumentOutOfRangeException(nameof(sampleType), sampleType, "Unsupported sample option")
         };
     }

sample/Cnblogs.DashScope.Sample/test.txt

@@ -0,0 +1 @@
+测试内容。

src/Cnblogs.DashScope.Core/ChatMessage.cs

@@ -1,4 +1,5 @@
-using Cnblogs.DashScope.Core.Internals;
+using System.Text.Json.Serialization;
+using Cnblogs.DashScope.Core.Internals;
 
 namespace Cnblogs.DashScope.Core;
 
@@ -9,4 +10,28 @@ namespace Cnblogs.DashScope.Core;
 /// <param name="Content">The content of this message.</param>
 /// <param name="Name">Used when role is tool, represents the function name of this message generated by.</param>
 /// <param name="ToolCalls">Calls to the function.</param>
-public record ChatMessage(string Role, string Content, string? Name = null, List<ToolCall>? ToolCalls = null) : IMessage<string>;
+[method: JsonConstructor]
+public record ChatMessage(
+    string Role,
+    string Content,
+    string? Name = null,
+    List<ToolCall>? ToolCalls = null) : IMessage<string>
+{
+    /// <summary>
+    /// Create chat message from an uploaded DashScope file.
+    /// </summary>
+    /// <param name="fileId">The id of the file.</param>
+    public ChatMessage(DashScopeFileId fileId)
+        : this("system", fileId.ToUrl())
+    {
+    }
+
+    /// <summary>
+    /// Create chat message from multiple DashScope file.
+    /// </summary>
+    /// <param name="fileIds">Ids of the files.</param>
+    public ChatMessage(IEnumerable<DashScopeFileId> fileIds)
+        : this("system", string.Join(',', fileIds.Select(f => f.ToUrl())))
+    {
+    }
+}

src/Cnblogs.DashScope.Core/DashScopeClientCore.cs

@@ -1,4 +1,5 @@
-using System.Net.Http.Headers;
+using System.Diagnostics.CodeAnalysis;
+using System.Net.Http.Headers;
 using System.Net.Http.Json;
 using System.Runtime.CompilerServices;
 using System.Text;
@@ -130,32 +131,32 @@ public async Task<DashScopeTaskList> ListTasksAsync(
 
         if (startTime.HasValue)
         {
-            queryString.Append($"start_time={startTime:YYYYMMDDhhmmss}");
+            queryString.Append($"&start_time={startTime:YYYYMMDDhhmmss}");
         }
 
         if (endTime.HasValue)
         {
-            queryString.Append($"end_time={endTime:YYYYMMDDhhmmss}");
+            queryString.Append($"&end_time={endTime:YYYYMMDDhhmmss}");
         }
 
         if (string.IsNullOrEmpty(modelName) == false)
         {
-            queryString.Append($"model_name={modelName}");
+            queryString.Append($"&model_name={modelName}");
         }
 
         if (status.HasValue)
         {
-            queryString.Append($"status={status}");
+            queryString.Append($"&status={status}");
         }
 
         if (pageNo.HasValue)
         {
-            queryString.Append($"page_no={pageNo}");
+            queryString.Append($"&page_no={pageNo}");
         }
 
         if (pageSize.HasValue)
         {
-            queryString.Append($"page_size={pageSize}");
+            queryString.Append($"&page_size={pageSize}");
         }
 
         var request = BuildRequest(HttpMethod.Get, $"{ApiLinks.Tasks}?{queryString}");
@@ -202,6 +203,41 @@ public async Task<ModelResponse<BackgroundGenerationOutput, BackgroundGeneration
             cancellationToken))!;
     }
 
+    /// <inheritdoc />
+    public async Task<DashScopeFile> UploadFileAsync(
+        Stream file,
+        string filename,
+        string purpose = "file-extract",
+        CancellationToken cancellationToken = default)
+    {
+        var form = new MultipartFormDataContent();
+        form.Add(new StreamContent(file), "file", filename);
+        form.Add(new StringContent(purpose), nameof(purpose));
+        var request = new HttpRequestMessage(HttpMethod.Post, ApiLinks.Files) { Content = form };
+        return (await SendCompatibleAsync<DashScopeFile>(request, cancellationToken))!;
+    }
+
+    /// <inheritdoc />
+    public async Task<DashScopeFile> GetFileAsync(DashScopeFileId id, CancellationToken cancellationToken = default)
+    {
+        var request = BuildRequest(HttpMethod.Get, ApiLinks.Files + $"/{id}");
+        return (await SendCompatibleAsync<DashScopeFile>(request, cancellationToken))!;
+    }
+
+    /// <inheritdoc />
+    public async Task<DashScopeFileList> ListFilesAsync(CancellationToken cancellationToken = default)
+    {
+        var request = BuildRequest(HttpMethod.Get, ApiLinks.Files);
+        return (await SendCompatibleAsync<DashScopeFileList>(request, cancellationToken))!;
+    }
+
+    /// <inheritdoc />
+    public async Task<DashScopeDeleteFileResult> DeleteFileAsync(DashScopeFileId id, CancellationToken cancellationToken = default)
+    {
+        var request = BuildRequest(HttpMethod.Delete, ApiLinks.Files + $"/{id}");
+        return (await SendCompatibleAsync<DashScopeDeleteFileResult>(request, cancellationToken))!;
+    }
+
     private static HttpRequestMessage BuildSseRequest<TPayload>(HttpMethod method, string url, TPayload payload)
         where TPayload : class
     {
@@ -239,6 +275,24 @@ private static HttpRequestMessage BuildRequest<TPayload>(
         return message;
     }
 
+    private async Task<TResponse?> SendCompatibleAsync<TResponse>(
+        HttpRequestMessage message,
+        CancellationToken cancellationToken)
+        where TResponse : class
+    {
+        var response = await GetSuccessResponseAsync<OpenAiErrorResponse>(
+            message,
+            r => new DashScopeError()
+            {
+                Code = r.Error.Type,
+                Message = r.Error.Message,
+                RequestId = string.Empty
+            },
+            HttpCompletionOption.ResponseContentRead,
+            cancellationToken);
+        return await response.Content.ReadFromJsonAsync<TResponse>(SerializationOptions, cancellationToken);
+    }
+
     private async Task<TResponse?> SendAsync<TResponse>(HttpRequestMessage message, CancellationToken cancellationToken)
         where TResponse : class
     {
@@ -286,6 +340,15 @@ private async Task<HttpResponseMessage> GetSuccessResponseAsync(
         HttpRequestMessage message,
         HttpCompletionOption completeOption = HttpCompletionOption.ResponseContentRead,
         CancellationToken cancellationToken = default)
+    {
+        return await GetSuccessResponseAsync<DashScopeError>(message, f => f, completeOption, cancellationToken);
+    }
+
+    private async Task<HttpResponseMessage> GetSuccessResponseAsync<TError>(
+        HttpRequestMessage message,
+        Func<TError, DashScopeError> errorMapper,
+        HttpCompletionOption completeOption = HttpCompletionOption.ResponseContentRead,
+        CancellationToken cancellationToken = default)
     {
         HttpResponseMessage response;
         try
@@ -305,14 +368,31 @@ private async Task<HttpResponseMessage> GetSuccessResponseAsync(
         DashScopeError? error = null;
         try
         {
-            error = await response.Content.ReadFromJsonAsync<DashScopeError>(SerializationOptions, cancellationToken);
+            var r = await response.Content.ReadFromJsonAsync<TError>(SerializationOptions, cancellationToken);
+            error = r == null ? null : errorMapper.Invoke(r);
         }
         catch (Exception)
         {
             // ignore
         }
 
+        await ThrowDashScopeExceptionAsync(error, message, response, cancellationToken);
+        // will never reach here
+        return response;
+    }
+
+    [DoesNotReturn]
+    private static async Task ThrowDashScopeExceptionAsync(
+        DashScopeError? error,
+        HttpRequestMessage message,
+        HttpResponseMessage response,
+        CancellationToken cancellationToken)
+    {
         var errorMessage = error?.Message ?? await response.Content.ReadAsStringAsync(cancellationToken);
-        throw new DashScopeException(message.RequestUri?.ToString(), (int)response.StatusCode, error, errorMessage);
+        throw new DashScopeException(
+            message.RequestUri?.ToString(),
+            (int)response.StatusCode,
+            error,
+            errorMessage);
     }
 }

src/Cnblogs.DashScope.Core/DashScopeDeleteFileResult.cs

@@ -0,0 +1,9 @@
+namespace Cnblogs.DashScope.Core;
+
+/// <summary>
+/// Result of a delete file action.
+/// </summary>
+/// <param name="Object">Always be "file".</param>
+/// <param name="Deleted">Deletion result.</param>
+/// <param name="Id">Deleting file's id.</param>
+public record DashScopeDeleteFileResult(string Object, bool Deleted, DashScopeFileId Id);