如何在c＃中使用谷歌语音识别api？

我想从c＃获取音频文件并发送到谷歌语音识别API以获得“语音到文本”的答案。

我的代码是这样的：

try { byte[] BA_AudioFile = GetFile(filename); HttpWebRequest _HWR_SpeechToText = null; _HWR_SpeechToText = (HttpWebRequest)HttpWebRequest.Create( "https://www.google.com/speech-api/v2/recognize?output=json&lang=" + DEFAULT_LANGUAGE + "&key=" + key); _HWR_SpeechToText.Credentials = CredentialCache.DefaultCredentials; _HWR_SpeechToText.Method = "POST"; _HWR_SpeechToText.ContentType = "audio/x-flac; rate=44100"; _HWR_SpeechToText.ContentLength = BA_AudioFile.Length; Stream stream = _HWR_SpeechToText.GetRequestStream(); stream.Write(BA_AudioFile, 0, BA_AudioFile.Length); stream.Close(); HttpWebResponse HWR_Response = (HttpWebResponse)_HWR_SpeechToText.GetResponse(); if (HWR_Response.StatusCode == HttpStatusCode.OK) { StreamReader SR_Response = new StreamReader(HWR_Response.GetResponseStream()); Console.WriteLine(SR_Response.ToString()); } } catch (Exception ex) { Console.WriteLine(ex.ToString()); } 

这部分用于上传file.wav并获取我从Internet上找到的google API的响应。

但我的代码总是捕获exception：

在调用_HWR_SpeechToText.GetResponse（）之前，必须将内容长度字节写入请求流。 但我已经写过ContextLength了。

所以我的问题是为什么我的程序失败了？ 这是因为谷歌链接或HTTPWebRequest我使用不当？

这是我获得API密钥的正确位置吗？

Answer 1

我自己测试了这个，如果你有一个有效的API密钥，下面是一个有效的解决方案。

  using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Net; using System.IO; namespace GoogleRequest { class Program { static void Main(string[] args) { try { FileStream fileStream = File.OpenRead("good-morning-google.flac"); MemoryStream memoryStream = new MemoryStream(); memoryStream.SetLength(fileStream.Length); fileStream.Read(memoryStream.GetBuffer(), 0, (int)fileStream.Length); byte[] BA_AudioFile = memoryStream.GetBuffer(); HttpWebRequest _HWR_SpeechToText = null; _HWR_SpeechToText = (HttpWebRequest)HttpWebRequest.Create( "https://www.google.com/speech-api/v2/recognize?output=json&lang=en-us&key=YOUR_API_KEY_HERE"); _HWR_SpeechToText.Credentials = CredentialCache.DefaultCredentials; _HWR_SpeechToText.Method = "POST"; _HWR_SpeechToText.ContentType = "audio/x-flac; rate=44100"; _HWR_SpeechToText.ContentLength = BA_AudioFile.Length; Stream stream = _HWR_SpeechToText.GetRequestStream(); stream.Write(BA_AudioFile, 0, BA_AudioFile.Length); stream.Close(); HttpWebResponse HWR_Response = (HttpWebResponse)_HWR_SpeechToText.GetResponse(); if (HWR_Response.StatusCode == HttpStatusCode.OK) { StreamReader SR_Response = new StreamReader(HWR_Response.GetResponseStream()); Console.WriteLine(SR_Response.ReadToEnd()); } } catch (Exception ex) { Console.WriteLine(ex.ToString()); } Console.ReadLine(); } } }