注意事项科大讯飞语音转写 API 文档链接: https://www./doc/asr/lfasr/API.html. 操作系统：Windows APP_ID, SECRET_KEY的获取讯飞的好像不需要API_KEY，开放授权的方式和其他大厂的类似： 话不多说，直接上代码了# -*- coding: utf-8 -*-# # author: yanmeng2# # 非实时转写调用demoimport base64import hashlibimport hmacimport jsonimport osimport timeimport requestslfasr_host = 'http://raasr./api'# 请求的接口名api_prepare = '/prepare'api_upload = '/upload'api_merge = '/merge'api_get_progress = '/getProgress'api_get_result = '/getResult'# 文件分片大小10Mfile_piece_sice = 10485760# ——————————————————转写可配置参数————————————————# 参数可在官网界面（https://doc./rest_api/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.html）查看，根据需求可自行在gene_params方法里添加修改# 转写类型lfasr_type = 0# 是否开启分词has_participle = 'false'has_seperate = 'true'# 多候选词个数max_alternatives = 0# 子用户标识suid = ''class SliceIdGenerator: '''slice id生成器''' def __init__(self): self.__ch = 'aaaaaaaaa`' def getNextSliceId(self): ch = self.__ch j = len(ch) - 1 while j >= 0: cj = ch[j] if cj != 'z': ch = ch[:j] + chr(ord(cj) + 1) + ch[j + 1:] break else: ch = ch[:j] + 'a' + ch[j + 1:] j = j - 1 self.__ch = ch return self.__chclass RequestApi(object): def __init__(self, appid, secret_key, upload_file_path): self.appid = appid self.secret_key = secret_key self.upload_file_path = upload_file_path # 根据不同的apiname生成不同的参数,本示例中未使用全部参数您可在官网(https://doc./rest_api/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.html)查看后选择适合业务场景的进行更换 def gene_params(self, apiname, taskid=None, slice_id=None): appid = self.appid secret_key = self.secret_key upload_file_path = self.upload_file_path ts = str(int(time.time())) m2 = hashlib.md5() m2.update((appid + ts).encode('utf-8')) md5 = m2.hexdigest() md5 = bytes(md5, encoding='utf-8') # 以secret_key为key, 上面的md5为msg， 使用hashlib.sha1加密结果为signa signa = hmac.new(secret_key.encode('utf-8'), md5, hashlib.sha1).digest() signa = base64.b64encode(signa) signa = str(signa, 'utf-8') file_len = os.path.getsize(upload_file_path) file_name = os.path.basename(upload_file_path) param_dict = {} if apiname == api_prepare: # slice_num是指分片数量，如果您使用的音频都是较短音频也可以不分片，直接将slice_num指定为1即可 slice_num = int(file_len / file_piece_sice) + (0 if (file_len % file_piece_sice == 0) else 1) param_dict['app_id'] = appid param_dict['signa'] = signa param_dict['ts'] = ts param_dict['file_len'] = str(file_len) param_dict['file_name'] = file_name param_dict['slice_num'] = str(slice_num) elif apiname == api_upload: param_dict['app_id'] = appid param_dict['signa'] = signa param_dict['ts'] = ts param_dict['task_id'] = taskid param_dict['slice_id'] = slice_id elif apiname == api_merge: param_dict['app_id'] = appid param_dict['signa'] = signa param_dict['ts'] = ts param_dict['task_id'] = taskid param_dict['file_name'] = file_name elif apiname == api_get_progress or apiname == api_get_result: param_dict['app_id'] = appid param_dict['signa'] = signa param_dict['ts'] = ts param_dict['task_id'] = taskid return param_dict # 请求和结果解析，结果中各个字段的含义可参考：https://doc./rest_api/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.html def gene_request(self, apiname, data, files=None, headers=None): response = requests.post(lfasr_host + apiname, data=data, files=files, headers=headers) result = json.loads(response.text) if result['ok'] == 0: print('{} success:'.format(apiname) + str(result)) return result else: print('{} error:'.format(apiname) + str(result)) exit(0) return result # 预处理 def prepare_request(self): return self.gene_request(apiname=api_prepare, data=self.gene_params(api_prepare)) # 上传 def upload_request(self, taskid, upload_file_path): file_object = open(upload_file_path, 'rb') try: index = 1 sig = SliceIdGenerator() while True: content = file_object.read(file_piece_sice) if not content or len(content) == 0: break files = { 'filename': self.gene_params(api_upload).get('slice_id'), 'content': content } response = self.gene_request(api_upload, data=self.gene_params(api_upload, taskid=taskid, slice_id=sig.getNextSliceId()), files=files) if response.get('ok') != 0: # 上传分片失败 print('upload slice fail, response: ' + str(response)) return False print('upload slice ' + str(index) + ' success') index += 1 finally: 'file index:' + str(file_object.tell()) file_object.close() return True # 合并 def merge_request(self, taskid): return self.gene_request(api_merge, data=self.gene_params(api_merge, taskid=taskid)) # 获取进度 def get_progress_request(self, taskid): return self.gene_request(api_get_progress, data=self.gene_params(api_get_progress, taskid=taskid)) # 获取结果 def get_result_request(self, taskid): return self.gene_request(api_get_result, data=self.gene_params(api_get_result, taskid=taskid)) def all_api_request(self): # 1. 预处理 pre_result = self.prepare_request() taskid = pre_result['data'] # 2 . 分片上传 self.upload_request(taskid=taskid, upload_file_path=self.upload_file_path) # 3 . 文件合并 self.merge_request(taskid=taskid) # 4 . 获取任务进度 while True: # 每隔20秒获取一次任务进度 progress = self.get_progress_request(taskid) progress_dic = progress if progress_dic['err_no'] != 0 and progress_dic['err_no'] != 26605: print('task error: ' + progress_dic['failed']) return else: data = progress_dic['data'] task_status = json.loads(data) if task_status['status'] == 9: print('task ' + taskid + ' finished') break print('The task ' + taskid + ' is in processing, task status: ' + str(data)) # 每次获取进度间隔20S time.sleep(20) # 5 . 获取结果 self.get_result_request(taskid=taskid)# 注意：如果出现requests模块报错：'NoneType' object has no attribute 'read', 请尝试将requests模块更新到2.20.0或以上版本(本demo测试版本为2.20.0)# 输入讯飞开放平台的appid，secret_key和待转写的文件路径if __name__ == '__main__': APP_ID = '***' SECRET_KEY = '****' file_path = r'***.wav' api = RequestApi(appid=APP_ID, secret_key=SECRET_KEY, upload_file_path=file_path) api.all_api_request()
当然，你可以根据自己的需求对demo进行改进，比如你想并发识别录音，你可以添加多线程执行的函数，为了获取taskid方便，我在class的初始化里边添加了self.taskid = “None”，并在预处理结果返回之后重新对taskid赋值。
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