swift - OpenAI GPT-3 API 错误 : "You must provide a model parameter"

Question

我正在尝试通过 SWIFT 向 openAI API 发布问题。如果我通过 Postman 使用相同的有效载荷，它工作正常，但在 Xcode-Condole 中，我从 openAI 得到以下响应:

Response data string:
{
     "error": {
         "message": "you must provide a model parameter",
         "type": "invalid_request_error",
         "param": null,
         "code": null
    }
 }

这是我的代码:

 func getActivityAnalysis(){
    
    let url = URL(string: "https://api.openai.com/v1/completions")
    guard let requestUrl = url else { fatalError() }
    
    // Prepare URL Request Object
    var request = URLRequest(url: requestUrl)
    request.setValue("Bearer blaaaablaa", forHTTPHeaderField: "Authorization")
    request.httpMethod = "POST"
    
    
    let prompt = "just a test"
    let requestBody = OpenAIRequest(model: "text-davinci-003", prompt: prompt, max_tokens: 300, temperature: 0.5)
    
    let encoder = JSONEncoder()
    encoder.outputFormatting = .prettyPrinted
    let data = try! encoder.encode(requestBody)
    print(String(data: data, encoding: .utf8)!)
    
     
    // Set HTTP Request Body
    request.httpBody = data
    
    print("\(request.httpMethod!) \(request.url!)")
    print(request.allHTTPHeaderFields!)
    print(String(data: request.httpBody ?? Data(), encoding: .utf8)!)
    
    
    
    // Perform HTTP Request
    let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
            
            // Check for Error
            if let error = error {
                print("Error took place \(error)")
                return
            }
     
            // Convert HTTP Response Data to a String
            if let data = data, let dataString = String(data: data, encoding: .utf8) {
                print("Response data string:\n \(dataString)")
                self.openAIResponse = dataString
            }
    }
    task.resume()
    
}`

如果我打印 http 请求，对我来说似乎也很好:

 POST https://api.openai.com/v1/completions
 ["Authorization": "Bearer blaaaaa"]
 {
    "temperature" : 0.5,
    "model" : "text-davinci-003",
    "prompt" : "just a test",
    "max_tokens" : 300
 }

我试图在我的 Postman 请求中使用相同的负载。它在这里工作得很好。我也尝试使用不同的编码，但它总是抛出相同的错误。

不确定，我做错了什么。也许有人可以提供帮助？

提前谢谢你。

赌注，托比

Answer 1

您的 HTTP 请求揭示了问题。您需要添加 'Content-Type: application/json'。

根据 GeeksforGeeks :

Content-Type is an HTTP header that is used to indicate the media typeof the resource and in the case of responses, it tells the browserabout what actually content type of the returned content is.