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基于python3 讯飞webapi语音识别 接口调用的实现。
一、环境
1、注册讯飞平台账号：讯飞平台网址
2、进入控制台并创建应用
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3、进入应用后点击右侧语音识别-语音听写，系统会生成服务端口认证信息appid、apisecret、apikey，后面调用接口的时候会用到，往下滑动可看到接口地址
二、引入库
需要提前安装所需的库
使用pip安装
python -m pip install websocket-client
import websocket import datetime import hashlib import base64 import hmac import json from urllib.parse import urlencode import time import ssl from wsgiref.handlers import format_date_time from datetime import datetime from time import mktime import _thread as thread
三、代码实例
1、进入讯飞资料文档中心：语音听写（流式版）webapi 文档 | 讯飞开放平台文档中心
下载python3 demo
demo中的on_message方法需要小小的改动，在输出完整的数据之前先进行判断是否已经是最后一帧了。已在下面的代码中体现
下列代码中的appid、apisecret、apikey、url根据标题一中3步骤的内容更改
import websocket
import datetime
import hashlib
import base64
import hmac
import json
from urllib.parse import urlencode
import time
import ssl
from wsgiref.handlers import format_date_time
from datetime import datetime
from time import mktime
import _thread as thread
status_first_frame = 0 # 第一帧的标识
status_continue_frame = 1 # 中间帧标识
status_last_frame = 2 # 最后一帧的标识
class ws_param(object):
# 初始化
def __init__(self, appid, apikey, apisecret, audiofile):
self.appid = appid
self.apikey = apikey
self.apisecret = apisecret
self.audiofile = audiofile
# 公共参数(common)
self.commonargs = {"app_id": self.appid}
# 业务参数(business)，更多个性化参数可在官网查看
self.businessargs = {"domain": "iat", "language": "zh_cn", "accent": "mandarin", "vinfo":1,"vad_eos":10000}
# 生成url
def create_url(self):
url = 'wss://ws-api.xfyun.cn/v2/iat'
# 生成rfc1123格式的时间戳
now = datetime.now()
date = format_date_time(mktime(now.timetuple()))
# 拼接字符串
signature_origin = "host: " + "ws-api.xfyun.cn" + "\n"
signature_origin += "date: " + date + "\n"
signature_origin += "get " + "/v2/iat " + "http/1.1"
# 进行hmac-sha256进行加密
signature_sha = hmac.new(self.apisecret.encode('utf-8'), signature_origin.encode('utf-8'),
digestmod=hashlib.sha256).digest()
signature_sha = base64.b64encode(signature_sha).decode(encoding='utf-8')
authorization_origin = "api_key=\"%s\", algorithm=\"%s\", headers=\"%s\", signature=\"%s\"" % (
self.apikey, "hmac-sha256", "host date request-line", signature_sha)
authorization = base64.b64encode(authorization_origin.encode('utf-8')).decode(encoding='utf-8')
# 将请求的鉴权参数组合为字典
v = {
"authorization": authorization,
"date": date,
"host": "ws-api.xfyun.cn"
}
# 拼接鉴权参数，生成url
url = url + '?' + urlencode(v)
# print("date: ",date)
# print("v: ",v)
# 此处打印出建立连接时候的url,参考本demo的时候可取消上方打印的注释，比对相同参数时生成的url与自己代码生成的url是否一致
# print('websocket url :', url)
return url
# 收到websocket消息的处理
all_results = ""
def on_message(ws, message):
global all_results
try:
code = json.loads(message)["code"]
sid = json.loads(message)["sid"]
if code != 0:
errmsg = json.loads(message)["message"]
print("sid:%s call error:%s code is:%s" % (sid, errmsg, code))
else:
data = json.loads(message)["data"]["result"]["ws"]
# print(json.loads(message))
result = ""
for i in data:
tm = str(i["bg"])
for w in i["cw"]:
result += w["w"]
# 添加到全局结果
all_results += result
# 检查是否为最后一帧
if "status" in json.loads(message)["data"]:
if json.loads(message)["data"]["status"] == 2: # 判断是否为最后一帧
print("sid:%s call success!, combined data is: %s" % (sid, all_results)) # 添加句号到最后
all_results = "" # 清空全局结果
#print("sid:%s call success!,data is:%s" % (sid, json.dumps(data, ensure_ascii=false)))
#print("sid:%s call success!,data is:%s" % (sid, result))
except exception as e:
print("receive msg,but parse exception:", e)
# 收到websocket错误的处理
def on_error(ws, error):
print("### error:", error)
# 收到websocket关闭的处理
def on_close(ws,a,b):
print("### closed ###")
# 收到websocket连接建立的处理
def on_open(ws):
def run(*args):
framesize = 8000 # 每一帧的音频大小
intervel = 0.04 # 发送音频间隔(单位:s)
status = status_first_frame # 音频的状态信息，标识音频是第一帧，还是中间帧、最后一帧
with open(wsparam.audiofile, "rb") as fp:
while true:
buf = fp.read(framesize)
# 文件结束
if not buf:
status = status_last_frame
# 第一帧处理
# 发送第一帧音频，带business 参数
# appid 必须带上，只需第一帧发送
if status == status_first_frame:
d = {"common": wsparam.commonargs,
"business": wsparam.businessargs,
"data": {"status": 0, "format": "audio/l16;rate=16000",
"audio": str(base64.b64encode(buf), 'utf-8'),
"encoding": "raw"}}
d = json.dumps(d)
ws.send(d)
status = status_continue_frame
# 中间帧处理
elif status == status_continue_frame:
d = {"data": {"status": 1, "format": "audio/l16;rate=16000",
"audio": str(base64.b64encode(buf), 'utf-8'),
"encoding": "raw"}}
ws.send(json.dumps(d))
# 最后一帧处理
elif status == status_last_frame:
d = {"data": {"status": 2, "format": "audio/l16;rate=16000",
"audio": str(base64.b64encode(buf), 'utf-8'),
"encoding": "raw"}}
ws.send(json.dumps(d))
time.sleep(1)
break
# 模拟音频采样间隔
time.sleep(intervel)
ws.close()
thread.start_new_thread(run, ())
if __name__ == "__main__":
# 测试时候在此处正确填写相关信息即可运行
time1 = datetime.now()
wsparam = ws_param(appid='xxx', apisecret='xxx',
apikey='xxx',
audiofile=r'c:\users\1\downloads\iat_pcm_8k.pcm')
websocket.enabletrace(false)
wsurl = wsparam.create_url()
ws = websocket.websocketapp(wsurl, on_message=on_message, on_error=on_error, on_close=on_close)
ws.on_open = on_open
ws.run_forever(sslopt={"cert_reqs": ssl.cert_none})
time2 = datetime.now()
print(time2-time1) 四、运行结果
五、总结
modulenotfounderror: no module named 'websocket'
attributeerror: module 'websocket' has no attribute 'enabletrace'
以上错误需要安装websocket-client库即可解决
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