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Using Node.js SDK

Updated at: Mar 31, 2020 GMT+08:00

Users can use SDK in token- or AK/SK-based authentication mode. For details about how to obtain authentication messages, see Authentication. This section describes how to use SDK in token- and AK/SK-based modes.

A user needs to apply for enabling the service before using it for the first time. For details about how to enable the service, click Subscribe. You only need to subscribe to OCR once.

AK/SK-based Authentication

This section uses Password OCR as an example to describe how to use SDK in AK/SK-based authentication mode.

  1. Obtain AK/SK. For details, see Authentication > AK/SK-based Authentication.
  2. Configure AK/SK of the Node.js SDK.

    Change the values of appKey and appSecret in the demo.js file of the demo project to the obtained AK/SK.

    Figure 1 Modifying parameters in the demo.js file
  3. If you use a local image file for recognition, change the image path in demo.js to the path of the file. If you use the default image of the SDK, you do not need to modify the image path.
  4. Execute the demo.js file. If 200 is displayed on the console, the program is successfully executed. You can view the recognition result on the console.
        "result": {
            "country_code": "IND", 
            "surname": "KUMAR", 
            "given_name": "ASHISH", 
            "passport_number": "G0080008", 
            "date_of_birth": "1988-08-18", 
            "sex": "M", 
            "date_of_expiry": "2017-11-25", 
            "machine_code": "P<INDKUMAR<<ASHISH<<<<<<<<<<<<<<<<<<<<<<<<<", 
            "machine_code2": "G0080008<2IND8808188M1711257<<<<<<<<<<<<<<<8", 
            "extra_info": {},
            "confidence": {
                "country_code": 0.9684, 
                "surname": 0.9684, 
                "given_name": 0.9684, 
                "passport_number": 0.9276, 
                "date_of_birth": 0.9276, 
                "sex": 0.9276, 
                "date_of_expiry": 0.9276, 
                "machine_code": 0.9684, 
                "machine_code2": 0.9276

    To call other OCR services, change the first parameter of the requestOcrServiceBase64 function to the specific URI. For the URI list, see Mappings Between Services and APIs.

Token-based Authentication

This section uses Password OCR as an example to describe how to use SDK in token-based authentication mode.

  1. Open the demo.js file. Change the values of username, password, and domainName in the main function to the actual username, password, and domain name registered with the system. If the user is not an IAM user, the domain name and username are the same.
    Figure 2 Changing the username, password, and domain name in the demo.js file
  2. Execute the code. The recognition result is displayed.

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