100 lines
3.2 KiB
Python
100 lines
3.2 KiB
Python
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# -*- coding: utf-8 -*-
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import hashlib
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import hmac
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import json
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import sys
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import time
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import base64
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from datetime import datetime
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if sys.version_info[0] <= 2:
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from httplib import HTTPSConnection
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else:
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from http.client import HTTPSConnection
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def sign(key, msg):
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return hmac.new(key, msg.encode("utf-8"), hashlib.sha256).digest()
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with open("C:/Users/ec-users/Downloads/test.m4a", "rb") as f:
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content = f.read()
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encoded_audio = base64.b64encode(content)
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# 在平台上查找对应key
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secret_id = ""
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secret_key = ""
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token = ""
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service = "asr"
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host = "asr.tencentcloudapi.com"
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region = ""
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version = "2019-06-14"
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action = "CreateRecTask"
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payload = '{\"EngineModelType\":\"16k_zh\",\"ChannelNum\":1,\"ResTextFormat\":0,\"SourceType\":1,\"Data\":\"' + \
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encoded_audio.decode("utf8") + '\"}'
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params = json.loads(payload)
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endpoint = "https://asr.tencentcloudapi.com"
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algorithm = "TC3-HMAC-SHA256"
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timestamp = int(time.time())
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date = datetime.utcfromtimestamp(timestamp).strftime("%Y-%m-%d")
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# ************* 步骤 1：拼接规范请求串 *************
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http_request_method = "POST"
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canonical_uri = "/"
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canonical_querystring = ""
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ct = "application/json; charset=utf-8"
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canonical_headers = "content-type:%s\nhost:%s\nx-tc-action:%s\n" % (
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ct, host, action.lower())
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signed_headers = "content-type;host;x-tc-action"
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hashed_request_payload = hashlib.sha256(payload.encode("utf-8")).hexdigest()
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canonical_request = (http_request_method + "\n" +
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canonical_uri + "\n" +
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canonical_querystring + "\n" +
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canonical_headers + "\n" +
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signed_headers + "\n" +
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hashed_request_payload)
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# ************* 步骤 2：拼接待签名字符串 *************
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credential_scope = date + "/" + service + "/" + "tc3_request"
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hashed_canonical_request = hashlib.sha256(
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canonical_request.encode("utf-8")).hexdigest()
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string_to_sign = (algorithm + "\n" +
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str(timestamp) + "\n" +
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credential_scope + "\n" +
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hashed_canonical_request)
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# ************* 步骤 3：计算签名 *************
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secret_date = sign(("TC3" + secret_key).encode("utf-8"), date)
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secret_service = sign(secret_date, service)
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secret_signing = sign(secret_service, "tc3_request")
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signature = hmac.new(secret_signing, string_to_sign.encode(
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"utf-8"), hashlib.sha256).hexdigest()
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# ************* 步骤 4：拼接 Authorization *************
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authorization = (algorithm + " " +
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"Credential=" + secret_id + "/" + credential_scope + ", " +
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"SignedHeaders=" + signed_headers + ", " +
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"Signature=" + signature)
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# ************* 步骤 5：构造并发起请求 *************
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headers = {
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"Authorization": authorization,
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"Content-Type": "application/json; charset=utf-8",
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"Host": host,
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"X-TC-Action": action,
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"X-TC-Timestamp": timestamp,
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"X-TC-Version": version
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}
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if region:
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headers["X-TC-Region"] = region
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if token:
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headers["X-TC-Token"] = token
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try:
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req = HTTPSConnection(host)
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req.request("POST", "/", headers=headers, body=payload.encode("utf-8"))
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resp = req.getresponse()
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print(resp.read())
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except Exception as err:
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print(err)
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