谷歌的语音识别API

问题描述：

我想（仅用于测试）使用谷歌API：谷歌的语音识别API

https://www.google.com/speech-api/v1/recognize?xjerr=1&client=chromium&lang=en-US

我的问题是：我应该如何发送POST请求，这个网址是什么？我使用的是：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *recDir = [paths objectAtIndex:0]; 
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/recordTest.flac", recDir]]; 


NSData *myData = [NSData dataWithContentsOfFile:[NSString stringWithFormat:@"%@/recordTest.flac", recDir]]; 
//NSString *audio = [NSString stringWithContentsOfFile:[NSString stringWithFormat:@"%@/recordTest.flac", recDir]]; 



NSMutableURLRequest *request = [[NSMutableURLRequest alloc] 
           initWithURL:[NSURL 
              URLWithString:@"https://www.google.com/speech-api/v1/recognize?xjerr=1&client=chromium&lang=en-US"]]; 






[request setHTTPMethod:@"POST"]; 

//set headers 

[request addValue:@"Content-Type" forHTTPHeaderField:@"audio/x-flac; rate=16000"]; 

[request addValue:@"audio/x-flac; rate=16000" forHTTPHeaderField:@"Content-Type"]; 

NSString *requestBody = [[NSString alloc] initWithFormat:@"Content=%@", myData]; 

[request setHTTPBody:[requestBody dataUsingEncoding:NSASCIIStringEncoding]]; 

[request setValue:[NSString stringWithFormat:@"%d",[myData length]] forHTTPHeaderField:@"Content-length"]; 



NSHTTPURLResponse* urlResponse = nil; 
NSError *error = [[NSError alloc] init]; 
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error]; 
NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; 

NSLog(@"The answer is: %@",result);

但我只得到

{ 
"status":5, 
"id":"fe6ba68a593f9919f5fd33e819d493a0-1", 
"hypotheses":[ 
HERE SHOULD BE THE TEXT 
] 
}

哪些错误/我应该怎么办？

+1，有趣的一个。 – 2012-06-22 02:39:33

顺便说一下，你滥用'addValue：forHTTPHeaderField：'和'setHTTPBody：'方法 - 在文档中查找它们的用法。 – 2012-06-22 02:42:26

答

而是用相当混乱的可可实施的烦心事，看看我非常容易使用的（一个函数）C库谷歌语音：http://github.com/H2CO3/libsprec

是否有任何示例代码 –

@VipinVijay只是访问GitHub回购链接。有两个示例程序。 – 2012-11-03 14:40:23

可以请你提供一个关于我的链接 –

答

FYI 状态：0 - 正确的，状态：4 - 缺少音频文件，状态：5 - 音频文件不正确。

In place of ; 

    NSString *requestBody = [[NSString alloc] initWithFormat:@"Content=%@", myData]; 
    [request setHTTPBody:[requestBody dataUsingEncoding:NSASCIIStringEncoding]];

Just Use;

[request setHTTPBody:myData];

这里是工作的代码以供参考：

- （无效）googleSTT {

NSString *homeDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; 
    NSString *filePath = [NSString stringWithFormat:@"%@/%@", homeDirectory, @"test.flac"]; 

    NSData *myData = [NSData dataWithContentsOfFile:filePath]; 


    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] 
           initWithURL:[NSURL 
              URLWithString:@"https://www.google.com/speech-api/v1/recognize?xjerr=1&client=chromium&lang=en-US"]]; 

    [request setHTTPMethod:@"POST"]; 

    //set headers 

    [request addValue:@"Content-Type" forHTTPHeaderField:@"audio/x-flac; rate=16000"]; 

    [request addValue:@"audio/x-flac; rate=16000" forHTTPHeaderField:@"Content-Type"]; 

    [request setHTTPBody:myData]; 

    [request setValue:[NSString stringWithFormat:@"%d",[myData length]] forHTTPHeaderField:@"Content-length"]; 

    NSHTTPURLResponse* urlResponse = nil; 
    NSError *error = [[NSError alloc] init]; 
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error]; 
    NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; 

    NSLog(@"The answer is: %@",result);

}

我试过你的代码，但得到空结果字符串，我所做的是记录一个wav音频文件，然后将其转换为flac文件，现在使用你的代码但没有成功，请指导我更多。 – Mak13

嘿我解决了它:)谢谢 – Mak13

答

我用同样的问题挣扎，但后来我通过解决它参考此链接https://github.com/gillesdemey/google-speech-v2.and只需用此替换您的NSMutableURLRequest *请求 NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:[NSURL URLWithString:@"https://github.com/gillesdemey/google-speech-v2"]];

谷歌的语音识别API

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