Single Image Synchronous Moderation

Parameter Specification

• Request URL:

https://isafe.ilivedata.com/api/v1/image/check

• Image requirements:

  • Supported types: URL, BASE64
  • Supported formats: jpg, png, bmp, gif, webp, tiff, heic;
  • Supported image size: <10M;
  • Description of gif/long image: Automatically cut gif/long image into frame and check, up to 5 images. Gif/long images are billed according to the actual number of screenshots; Definition of long image: images whose ratio of length and width is greater than 5.

• HTTP request Header:

• Request method：POST

• Request body JSON object:

• Example of request body:

        {
        "type":2,
        "image":"T2dnUwACAAAAAAAAAAAd8pVTAAAAAGsIvpMBE...",
        "userId": "testUser",
        "did": "868034031518269",
        "dtype": "1"
        }     
  

• Request signature:

When the user requests the Image Check API, the request can be signed with the appId and secretKey (obtained from the Console - Service Configuration). When the API receives the request with the signature information, it will verify the signature using the same algorithm, and if the signature is found to be inconsistent, the API will return 401 error to the user.

If the API validation signature is consistent and the user corresponding to the appId has permission to operate the requested resource, the request succeeds, otherwise the API returns 401 error.

• Request Header to send a signature via HTTP

Method: Add a header named Authorization in the request, whose value is the signature value. For example:

 Authorization: ****

• Signature calculation method

1. Canonicalized Query String:

Convert the request body JSON string to a hexadecimal string (not Base64) by doing sha256 encoding with UTF-8 character encoding.

CanonicalizedQueryString = hex(sha256(jsonBody))

2. Constructs the signed string StringToSign ("\n" stands for ASCII newline character):

   StringToSign = HTTPMethod + “\n” + HostHeaderInLowercase + “\n” + HTTPRequestURI + “\n” + CanonicalizedQueryString < Get from previous step> + “\n” + “X-AppId:” + SAME_APPID_IN_HEADER + “\n” + “X-TimeStamp:” + SAME_TIMESTAMP_IN_HEADER

The HTTPRequestURI is the absolute path to the request URI, without the request string. If the HTTPRequestURI is empty, also keep a forward slash (/).

The hash-based message authentication code (HMAC) is created using the HMAC-SHA256 protocol and the signature is calculated.

For more information about HMAC, see: https://tools.ietf.org/html/rfc2104。

3. StringToSign as the signature string, secretKey as the secret key and SHA256 as the hash algorithm.

4. Converting the results of the previous step to a BASE64 string.

5. Put the BASE64 string into the Authorization of HTTP request Header.

• Example of signature

Below is an example of appId & secretKey & image.

appId=***
secrectKey=****
image_base64="T2dnUwACAAAAAAAAAAAd8pVTAAAAAGsIvpMBE..."

Below is an example of request type.

{
 "type": 2,
 "userId": "12345678",
 "image": "T2dnUwACAAAAAAAAAAAd8pVTAAAAAGsIvpMBE..."
}

Generate CanonicalizedQueryString

b3ad8e9d16439ccd5e91924d2516bf9592975003f69beff44e56cddf47bd3118

Generate StringToSign

POST
isafe.ilivedata.com
/api/v1/image/check
b3ad8e9d16439ccd5e91924d2516bf9592975003f69beff44e56cddf47bd3118
X-AppId:***
X-TimeStamp:2020-07-31T07:59:03Z

Signatures from HMAC calculations

****

HTTP Response

Content-Type: application/json;charset=UTF-8

The result is in JSON format, please refer to the following example.

Description of returning json field:

imageSpams:

extraInfo：

tags:

subTags:

• Example of response:

    {
        "errorCode": 0, "code": 0, "result": 2, "imageSpams": [{"code": 0, "result": 2, "tags": [{"tag": 200, "level": 2, "confidence": 76}]}], "gender": [], "taskId": "Telnet-test_d56b5c2d38614be3bf1a1e98663d3c29_1653017203620", "extraInfo": {"cartoonScore": 7, "genderResult": [], "numHuman": 0, "numFace": 0}
    }
  

Error code