Add swift 6 upgrade post

Author: mythz

MyApp/_posts/2024-12-04_swift6-upgrade.md

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+---
+title: ServiceStack.Swift client library rewritten for Swift 6
+summary: ServiceStack.Swift has been rewritten to take advantage of Swift 6 features, now dependency-free.
+tags: [api,service-reference,swift]
+author: Demis Bellot
+image: https://images.unsplash.com/photo-1534972195531-d756b9bfa9f2?crop=entropy&fit=crop&h=1000&w=2000
+draft: true
+---
+
+![](https://docs.servicestack.net/img/pages/servicestack-reference/swift-logo-banner.jpg)
+
+As part of the release of [AI Server](/posts/ai-server) we've upgraded all generic service client libraries 
+to support multiple file uploads with API requests to take advantage of AI Server APIs
+that accept file uploads like [Image to Image](https://docs.servicestack.net/ai-server/image-to-image), 
+[Speech to Text](https://docs.servicestack.net/ai-server/speech-to-text) or its 
+[FFmpeg Image](https://docs.servicestack.net/ai-server/transform/image) and 
+[Video Transforms](https://docs.servicestack.net/ai-server/transform/video).
+
+## ServiceStack.Swift rewritten for Swift 6
+
+[ServiceStack.Swift](https://github.com/ServiceStack/ServiceStack.Swift) received the biggest upgrade, 
+which was also rewritten to take advantage of Swift 6 features, including Swift promises which replaced the previous 
+[PromiseKit](https://github.com/mxcl/PromiseKit) dependency - making it dependency-free. 
+
+For example you can request a [Speech to Text](https://docs.servicestack.net/ai-server/speech-to-text) 
+transcription by sending an audio file to the `SpeechToText` API using the new `postFilesWithRequest` method:
+
+### Calling AI Server to transcribe an Audio Recording
+
+```swift
+let client = JsonServiceClient(baseUrl: "https://openai.servicestack.net")
+client.bearerToken = apiKey
+
+let request = SpeechToText()
+request.refId = "uniqueUserIdForRequest"
+
+let files = [UploadFile(fileName:"audio.mp3", data:mp3Data, fieldName:"audio")]
+
+let response: GenerationResponse = try client.postFilesWithRequest(
+    request:request, files:files)
+
+Inspect.printDump(response)
+``` 
+
+### Async Upload Files with API Example
+
+Alternatively use the new `postFilesWithRequestAsync` method to call the API asynchronously
+using [Swift 6 Concurrency](https://docs.swift.org/swift-book/documentation/the-swift-programming-language/concurrency/) 
+new **async/await** feature:
+
+```swift
+let response: GenerationResponse = try await client.postFilesWithRequestAsync(
+    request:request, files:files)
+    
+Inspect.printDump(response)
+```
+
+### Sending typed Open AI Chat Ollama Requests with Swift
+
+Even if you're not running AI Server you can still use its typed DTOs to call any compatible
+Open AI Chat Compatible API like a self-hosted [Ollama](https://ollama.com) API. To call this
+from Swift:
+
+Include `ServiceStack` package in your projects `Package.swift`
+
+```swift
+dependencies: [
+    .package(url: "https://github.com/ServiceStack/ServiceStack.Swift.git",
+        Version(6,0,0)..<Version(7,0,0)),
+],
+```
+
+Download AI Server's Swift DTOs:
+
+:::copy
+npx get-dtos swift https://openai.servicestack.net
+:::
+
+You'll then be able to call Ollama by sending the OpenAI Chat compatible `OpenAiChatCompletion` 
+Request DTO with the `JsonServiceClient`:
+
+```swift
+import Foundation
+import ServiceStack
+
+let ollamaBaseUrl = "http://localhost:11434"
+let client = JsonServiceClient(baseUrl:ollamaBaseUrl)
+
+let request = OpenAiChatCompletion()
+request.model = "mixtral:8x22b"
+let msg =  OpenAiMessage()
+msg.role = "user"
+msg.content = "What's the capital of France?"
+request.messages = [msg]
+request.max_tokens = 50
+
+let result:OpenAiChatResponse = try await client.postAsync(
+    "/v1/chat/completions", request:request)
+```
+

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