Fix the issue #80

Former-commit-id: 002b06d87fde4f71a6fa9576ff8922393c18ae63

install.py

@@ -11,7 +11,6 @@ packages = {
     "boto3": "boto3",
     "aliyunsdkcore": "aliyun-python-sdk-core",
     "aliyunsdkalimt": "aliyun-python-sdk-alimt",
-    "tencentcloud": "tencentcloud-sdk-python",
 }
 
 for package_name in packages:

scripts/sign_tencent.py

@@ -0,0 +1,65 @@
+import hashlib, hmac, json, time
+from datetime import datetime
+
+def sign_tencent(secret_id, secret_key, regin, params, action="TextTranslate", version = "2018-03-21"):
+    host = 'tmt.tencentcloudapi.com'
+    endpoint = "https://" + host
+    action = "TextTranslate"
+
+    service = "tmt"
+    algorithm = "TC3-HMAC-SHA256"
+    timestamp = int(time.time())
+    date = datetime.utcfromtimestamp(timestamp).strftime("%Y-%m-%d")
+
+    # ************* 步骤 1：拼接规范请求串 *************
+    http_request_method = "POST"
+    canonical_uri = "/"
+    canonical_querystring = ""
+    ct = "application/json; charset=utf-8"
+    payload = json.dumps(params)
+    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)
+
+    # ************* 步骤 2：拼接待签名字符串 *************
+    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)
+
+
+    # ************* 步骤 3：计算签名 *************
+    # 计算签名摘要函数
+    def sign(key, msg):
+        return hmac.new(key, msg.encode("utf-8"), hashlib.sha256).digest()
+    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()
+
+    # ************* 步骤 4：拼接 Authorization *************
+    authorization = (algorithm + " " +
+                    "Credential=" + secret_id + "/" + credential_scope + ", " +
+                    "SignedHeaders=" + signed_headers + ", " +
+                    "Signature=" + signature)
+
+    return {
+        "url": endpoint,
+        "headers": {
+            "Authorization": authorization,
+            "Content-Type": ct,
+            "Host": host,
+            "X-TC-Action": action,
+            "X-TC-Timestamp": str(timestamp),
+            "X-TC-Version": version,
+            "X-TC-Region": regin,
+        },
+    }

scripts/translate.py

@@ -1,4 +1,5 @@
 from scripts.get_translate_apis import get_translate_apis
+from scripts.sign_tencent import sign_tencent
 import hashlib
 import os
 import requests
@@ -224,24 +225,20 @@ def translate_tencent(text, from_lang, to_lang, api_config):
     if not region:
         raise Exception("region is required")
 
-    from tencentcloud.tmt.v20180321 import models
-    from tencentcloud.common import credential
-    from tencentcloud.tmt.v20180321 import tmt_client
-
-    request = models.TextTranslateRequest()
-    request.SourceText = text
-    request.Source = from_lang
-    request.Target = to_lang
-    request.ProjectId = 0
-    cred = credential.Credential(secret_id, secret_key)
-    client = tmt_client.TmtClient(cred, region)
-    response = client.TextTranslate(request)
-    result = json.loads(response.to_json_string())
-    if 'Error' in result:
-        raise Exception(result['Error']['Message'])
-    if 'TargetText' not in result:
+    params = {
+        'SourceText': text,
+        'Source': from_lang,
+        'Target': to_lang,
+        'ProjectId': 0
+    }
+    res = sign_tencent(secret_id, secret_key, region, params)
+    response = requests.post(res['url'], json=params, timeout=10, headers=res['headers'])
+    result = response.json()
+    if 'Response' not in result:
         raise Exception("No response from Tencent")
-    return result['TargetText']
+    if 'TargetText' not in result['Response']:
+        raise Exception("No response from Tencent")
+    return result['Response']['TargetText']
 
 
 def translate(text, from_lang, to_lang, api, api_config = {}):