public async Task TranscribeAudio()

in src/AIHub/Controllers/AudioTranscriptionController.cs [34:121]
75 lines of code
4 McCabe index (conditional complexity)

    public async Task<IActionResult> TranscribeAudio(string audio_url)
    {
        string audio = audio_url + sasUri.Query;

        // CALL 1: STT 3.1
        var request = new HttpRequestMessage(HttpMethod.Post, "https://" + speechRegion + ".api.cognitive.microsoft.com/speechtotext/v3.1/transcriptions");
        request.Headers.Add("Ocp-Apim-Subscription-Key", speechSubscriptionKey);
        var requestBody = new
        {
            contentUrls = new[] { audio },
            locale = "es-es",
            displayName = "My Transcription",
            model = (string?)null,
            properties = new
            {
                wordLevelTimestampsEnabled = true,
                languageIdentification = new
                {
                    candidateLocales = new[] { "en-US", "de-DE", "es-ES" }
                }
            }
        };
        Console.WriteLine(JsonSerializer.Serialize(requestBody));
        request.Content = new StringContent(JsonSerializer.Serialize(requestBody), Encoding.UTF8, "application/json");
        var response = await httpClient.SendAsync(request);
        response.EnsureSuccessStatusCode();
        var responsejson = JsonSerializer.Deserialize<JsonObject>(await response.Content.ReadAsStringAsync())!;
        Console.WriteLine(responsejson["self"]!.ToString());
        if (responsejson["self"] == null || responsejson["self"]!.ToString() == string.Empty)
        {
            ViewBag.Message = "Error in the transcription process";
            return View("AudioTranscription", model);
        }
        var output_result = responsejson["self"]!.ToString();
        Console.WriteLine("SELF: " + output_result);
        // CALL 2: CHECK FOR FINISH
        var request2 = new HttpRequestMessage(HttpMethod.Get, output_result);
        httpClient.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", speechSubscriptionKey);
        var content2 = new StringContent(string.Empty);
        content2.Headers.ContentType = new MediaTypeHeaderValue("application/json");
        request2.Content = content2;
        var response2 = await httpClient.SendAsync(request2);
        response2.EnsureSuccessStatusCode();
        //Console.WriteLine(await response2.Content.ReadAsStringAsync());
        var responsejson2 = JsonSerializer.Deserialize<JsonObject>(await response.Content.ReadAsStringAsync())!;
        Console.WriteLine(responsejson2);
        while (responsejson2["status"]!.ToString() != "Succeeded")
        {
            Thread.Sleep(10000);
            response2 = await httpClient.GetAsync(output_result);
            responsejson2 = JsonSerializer.Deserialize<JsonObject>(await response2.Content.ReadAsStringAsync())!;
            Console.WriteLine(responsejson2["status"]!.ToString());
        }

        // CALL 3: GET RESULTS URL
        var request3 = new HttpRequestMessage(HttpMethod.Get, output_result + "/files/");
        request3.Headers.Add("Ocp-Apim-Subscription-Key", speechSubscriptionKey);
        var content3 = new StringContent(string.Empty);
        content3.Headers.ContentType = new MediaTypeHeaderValue("application/json");
        request3.Content = content3;
        var response3 = await httpClient.SendAsync(request3);
        response3.EnsureSuccessStatusCode();
        var responsejson3 = JsonSerializer.Deserialize<JsonObject>(await response3.Content.ReadAsStringAsync())!;
        Console.WriteLine(responsejson3);
        // Extract contentUrl field
        string output_result3 = (string)responsejson3["values"]![0]!["links"]!["contentUrl"]!;
        Console.WriteLine(output_result3);

        // CALL 4: GET RESULTS (TRANSCRIPTION)
        var request4 = new HttpRequestMessage(HttpMethod.Get, output_result3);
        request4.Headers.Add("Ocp-Apim-Subscription-Key", speechSubscriptionKey);
        var content4 = new StringContent(string.Empty);
        content4.Headers.ContentType = new MediaTypeHeaderValue("application/json");
        request4.Content = content4;
        var response4 = await httpClient.SendAsync(request4);
        response4.EnsureSuccessStatusCode();
        Console.WriteLine(await response4.Content.ReadAsStringAsync());
        var jsonObject4 = JsonSerializer.Deserialize<JsonObject>(await response4.Content.ReadAsStringAsync())!;
        string output_result4 = (string)jsonObject4["combinedRecognizedPhrases"]![0]!["lexical"]!;
        Console.WriteLine(output_result4);

        // Show transcript results
        model.Message = output_result4;
        ViewBag.Message = "TRANSCRIPTION RESULTS: \n\n" + output_result4;

        // return View("AudioTranscription", model);
        return Ok(model);
    }