Activates Log Service. You must activate Log Service before you can use it to collect and manage logs.

Request parameters

  • Request headers

    The OpenSlsService operation does not have operation-specific request headers.

  • Parameters
    Request parameter Type Required Example Description
    Action String Yes OpenSlsService The operation that you want to perform. Set the value to OpenSlsService.
    AccessKeyId String Yes test-key The AccessKey ID provided to you by Alibaba Cloud.
    Signature String Yes xxxxxx The signature string of the current request. For more information about how signatures are calculated, see Signature method.
    SignatureMethod String Yes HMAC-SHA1 The encryption method of the signature string.
    SignatureVersion String Yes 1.0 The version of the signature encryption algorithm.
    SignatureNonce String Yes dt712rl9d A unique, random number used to prevent replay attacks. You must use different numbers for different requests.
    Timestamp String Yes 2018-01-01T12:00:00Z The timestamp of the request. Specify the time in the ISO 8601 standard in the yyyy-MM-ddTHH:mm:ssZ format. The time must be in UTC. For example, 2018-01-01T12:00:00Z indicates 20:00:00 on January 1, 2018 (UTC+8).
    Version String Yes 2019-10-23 The version number of the API. The value must be in the YYYY-MM-DD format.
    Format String No JSON The format in which to return the response. Valid values: JSON and XML. Default value: XML.

Signature method

  1. Compose and encode a string-to-sign.
    1. Create a canonicalized query string by arranging the request parameters (including all common and operation-specific parameters except Signature) in alphabetical order.
    2. Encode the parameters in UTF-8. For more information, see RFC 3986.
      • Uppercase letters, lowercase letters, digits, and some special characters such as hyphens (-), underscores (_), periods (.), and tildes (~) do not need to be encoded.
      • Other characters must be percent encoded in %XY format. XY represents the ASCII code of the characters in hexadecimal notation. For example, double quotation marks (") are encoded as %22.
      • Use an equal sign (=) to concatenate each encoded request parameter and its value.
      • Use an ampersand (&) to concatenate each encoded request parameter. The order of the parameter must be consistent with that in Step 1.a.
    3. Create a canonicalized query string.
  2. Create a string-to-sign.
    1. Create StringToSign.
        HTTPMethod + "&" + //HTTPMethod: HTTP method used to send the request, such as GET.
        percentEncode("/") + "&" + //percentEncode("/"): Encode backslash (/) as %2F.
        percentEncode(CanonicalizedQueryString) //Encode the canonicalized query string created in Step 1.
    2. Calculate the HMAC value of the string-to-sign as defined in RFC 2104. Use the SHA1 algorithm to calculate the HMAC value of the StringToSign. The AccessKey secret is used as the key for the HMAC calculation.
      Signature = Base64( HMAC-SHA1( AccessKeySecret + "&", UTF-8-Encoding-Of(StringToSign) ) )
    3. Encode the Signature parameter based on the RFC 3986 specification and add the encoded signature to the canonicalized query string.

The following sample code shows how to use Python to call the OpenSlsService operation:

import base64
import datetime
import hmac
import random
from hashlib import sha1
from urllib import parse

import pytz

url = ''
accessKeyId = 'test-key'
accessKeySecret = 'test-secret'

params = {
    'AccessKeyId': accessKeyId,
    'Action': 'OpenSlsService',
    'Format': 'JSON',
    'Version': '2019-10-23',
    'SignatureMethod': 'HMAC-SHA1',
    'SignatureNonce': str(int(random.random() * 1000000)),
    'SignatureVersion': '1.0',
    'Timestamp': parse.quote('%Y-%m-%dT%H:%M:%SZ')

def create_url():
    kvs = sorted(params.items(), key=lambda x: x[0])
    paramStr = '&'.join([k + '=' + v for k, v in kvs])
    sigStr = 'GET&%2F&' + parse.quote(paramStr, safe='')
    hashed = + '&').encode(), sigStr.encode(), sha1)
    signature = base64.encodebytes(
    return url + paramStr + '&Signature=' + signature


Response elements

  • Response header

    The OpenSlsService operation does not have operation-specific response headers.

  • Response element

    The HTTP status code 200 is returned.

    Response parameter Type Description
    RequestId String The ID of the request.
    Success Boolean Indicates whether the request is successful.
    Code String The error code.
    Message String The error description.


  • Sample request
    ? AccessKeyId=test-key
  • Sample success response
      "RequestId": "1CCC2B8E-4FF3-4755-A96C-8CE2E4BF27DF",
      "Message": "You have activated Log Service. You can go to the Log Service console to manage logs.",
      "Code": "200",
      "Success": true

Error code

HTTP status code Error code Error message Description
400 PermissionDenied No permission to open SLS service. The error message returned because you are not authorized to activate Log Service.
500 GetSpecificationsFailed Failed to get specifications of commodity. The error message returned because the information about Log Service has failed to be queried.
500 CreateOrderFailed Failed to create an order. The error message returned because the order has failed to be created.

For a list of error codes, see Common error codes.