我在网络上获得了Watson Speech-to-Text。我现在尝试在本机上做反应,但在文件上传部分出现错误。
我正在使用HTTPS Watson API。我需要设置Content-Type
否则Watson会返回错误响应。但是,在本机反应中,要使文件上传起作用,我们似乎需要将'Content-Type'
设置为'multipart/form-data'
。无论如何,在将Content-Type设置为'audio/aac'
时,还是以react-native方式上传文件?
如果我将'Content-Type': 'multipart/form-data'
设置为:
{
type: "default",
status: 400,
ok: false,
statusText: undefined,
headers: Object,
url: "https://stream.watsonplatform.net/speech-to-text/api/v1/recognize?continuous=true",
_bodyInit: Blob,
_bodyBlob: Blob
}
响应机构是:
{
"code_description": "Bad Request",
"code": 400,
"error": "No JSON object could be decoded"
}
这是我的代码(完整代码在这里 - gist.github.com):
const ext = 'aac';
const file_path = '/storage/emulated/0/Music/enter-the-book.aac';
data.append('file', {
uri: `file://${file_path}`,
name: `recording.${ext}`,
type: `audio/${ext}`
}, `recording.${ext}`);
const response = await fetch('https://stream.watsonplatform.net/speech-to-text/api/v1/recognize?continuous=true', {
method: 'POST',
headers: {
// 'Content-Type': `audio/${ext}`,
'Content-Type': 'multipart/form-data',
'X-Watson-Authorization-Token': token
},
body: data
});
console.log('watson-stt::getResults - response:', response);
if (response.status !== 200) {
const error = await response.text();
throw new Error(`Got bad response "status" (${response.status}) from Watson Speach to Text server, error: "${error}"`);
}
以下是我设置'Content-Type': 'audio/aac'
时出错的屏幕截图:
答案 0 :(得分:2)
根据documentation for multipart requests,请求应为:
curl -X POST -u "{username}":"{password}"
--header "Transfer-Encoding: chunked"
--form metadata="{
\"part_content_type\":\"audio/flac\",
\"timestamps\":true,
\"continuous\":true}"
--form upload="@audio-file1.flac"
"https://stream.watsonplatform.net/speech-to-text/api/v1/recognize"
因此content-type
应为multipart/form-data
,您可以将aac指定为"part_content_type": "audio/aac"
。
您遇到的最大问题是audio/aac
不受支持formats。您可能需要另一个编解码器。
答案 1 :(得分:1)
非常感谢DanielBolanos和NikolayShmyrev这是我使用的解决方案:
此代码适用于iOS,因此我将音频录制为blah.ulaw
但是part_content_type为aduio/mulaw;rate=22050
即使文件ext为mulaw
,使用ulaw
也非常重要。一个有趣的说明:我无法在macOS桌面上播放blah.ulaw
文件。
另请注意,您不能将Content-Type
设置为multipart/form-data
这会破坏boundary
。
Bluemix还需要part_content_type中的mulaw
的速率const body = new FormData();
let metadata = {
part_content_type: 'audio/mulaw;rate=22050' // and notice "mulaw" here, "ulaw" DOES NOT work here
};
body.append('metadata', JSON.stringify(metadata));
body.append('upload', {
uri: `file://${file_path}`,
name: `recording.ulaw`, // notice the use of "ulaw" here
type: `audio/ulaw` // and here it is also "ulaw"
});
const response = await fetch('https://stream.watsonplatform.net/speech-to-text/api/v1/recognize?continuous=true', {
method: 'POST',
headers: {
// 'Content-Type': 'multipart/form-data' // DO NOT SET THIS!! It destroys the boundary and messes up the request
'Authorization': `Basic ${btoa(`${USERNAME}:${PASSWORD}`)}`
},
body
});