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平臺功能比較多，以下用平臺中的“通用文字識別功能” 來展示完整的獲取API密鑰案例

2.注冊/登錄：點擊頁面右上角“登錄或注冊”

3.登錄成功以后進入右上角“控制臺”

4.在服務概覽中開通相對應的服務

5.選擇需要的服務，購買資源包

6.獲取密鑰：前往官網控制臺獲取密鑰，在左側導航欄 “API密鑰管理” 中新建密鑰。

2. 騰訊AI開放平臺 API密鑰可用性測試

在獲取API密鑰后，進行可用性測試是確保其正常工作的重要步驟。以下是使用Python進行測試的一個案例

輸入：

# -*- coding: utf-8 -*-
import hashlib
import hmac
import json
import sys
import time
from datetime import datetime
if sys.version_info[0] <= 2:
  from httplib import HTTPSConnection
else:
  from http.client import HTTPSConnection
?
?
def sign(key, msg):
  return hmac.new(key, msg.encode("utf-8"), hashlib.sha256).digest()
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# 實例化一個認證對象，入參需要傳入騰訊云賬戶 SecretId 和 SecretKey，此處還需注意密鑰對的保密
# 代碼泄露可能會導致 SecretId 和 SecretKey 泄露，并威脅賬號下所有資源的安全性。以下代碼示例僅供參考，建議采用更安全的方式來使用密鑰，請參見：https://cloud.tencent.com/document/product/1278/85305
# 密鑰可前往官網控制臺 https://console.cloud.tencent.com/cam/capi 進行獲取
secret_id = "SecretId"
secret_key = "SecretKey"
token = ""
?
service = "ocr"
host = "ocr.tencentcloudapi.com"
region = "ap-beijing"
version = "2018-11-19"
action = "RecognizeStoreName"
payload = "{\"ImageBase64\":\"https://ocr-demo-1254418846.cos.ap-guangzhou.myqcloud.com/***/fakeurl.jpg\"}"
params = json.loads(payload)
endpoint = "https://ocr.tencentcloudapi.com"
algorithm = "TC3-HMAC-SHA256"
timestamp = int(time.time())
date = datetime.utcfromtimestamp(timestamp).strftime("%Y-%m-%d")
?
# ************* 步驟 1：拼接規范請求串 *************
http_request_method = "POST"
canonical_uri = "/"
canonical_querystring = ""
ct = "application/json; charset=utf-8"
canonical_headers = "content-type:%s\nhost:%s\nx-tc-action:%s\n" % (ct, host, action.lower())
signed_headers = "content-type;host;x-tc-action"
hashed_request_payload = hashlib.sha256(payload.encode("utf-8")).hexdigest()
canonical_request = (http_request_method + "\n" +
                    canonical_uri + "\n" +
                    canonical_querystring + "\n" +
                    canonical_headers + "\n" +
                    signed_headers + "\n" +
                    hashed_request_payload)
?
# ************* 步驟 2：拼接待簽名字符串 *************
credential_scope = date + "/" + service + "/" + "tc3_request"
hashed_canonical_request = hashlib.sha256(canonical_request.encode("utf-8")).hexdigest()
string_to_sign = (algorithm + "\n" +
                str(timestamp) + "\n" +
                credential_scope + "\n" +
                hashed_canonical_request)
?
# ************* 步驟 3：計算簽名 *************
secret_date = sign(("TC3" + secret_key).encode("utf-8"), date)
secret_service = sign(secret_date, service)
secret_signing = sign(secret_service, "tc3_request")
signature = hmac.new(secret_signing, string_to_sign.encode("utf-8"), hashlib.sha256).hexdigest()
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# ************* 步驟 4：拼接 Authorization *************
authorization = (algorithm + " " +
                "Credential=" + secret_id + "/" + credential_scope + ", " +
                "SignedHeaders=" + signed_headers + ", " +
                "Signature=" + signature)
?
# ************* 步驟 5：構造并發起請求 *************
headers = {
  "Authorization": authorization,
  "Content-Type": "application/json; charset=utf-8",
  "Host": host,
  "X-TC-Action": action,
  "X-TC-Timestamp": timestamp,
  "X-TC-Version": version
}
if region:
  headers["X-TC-Region"] = region
if token:
  headers["X-TC-Token"] = token
?
try:
  req = HTTPSConnection(host)
  req.request("POST", "/", headers=headers, body=payload.encode("utf-8"))
  resp = req.getresponse()
  print(resp.read())
except Exception as err:
  print(err)
?

輸出：

你將得到一個JSON格式的響應，其中包含了轉換結果的詳細信息，如圖片的旋轉角度、商店信息的列表、商店的分類標簽等。

示例輸出：

{
  "Response": {
      "Angle": 0.988696813583374,
      "RequestId": "e450a988-e6b1-4dde-810c-59ab214d39a6",
      "StoreInfo": [
          {
              "Name": "商店名稱",
              "Rect": {
                  "Height": 263,
                  "Width": 1132,
                  "X": 232,
                  "Y": 366
              },
              "Value": "城市生活超市"
          },
          {
              "Name": "商店名稱",
              "Rect": {
                  "Height": 69,
                  "Width": 275,
                  "X": 240,
                  "Y": 557
              },
              "Value": "CITY LIFE"
          }
      ],
      "StoreLabel": [
          "門頭照"
      ]
  }
}