Receiving and Processing Messages Sent on LINE

Function

This interface is invoked to receive and process messages sent on LINE.

Usage Description

• Prerequisites

  The LINE channel has been correctly created in the AICC, and the AICC callback URL is correctly entered on the LINE developer platform.

Interface Authentication

Use the SHA256 algorithm to generate an authentication character string based on the request body and the value of appSecret in the channel configuration, and compare the character string with that in the LINE request header x-line-signature.

/**
     * Verify the LINE signature information.
     *
     * @param signature Signature information carried in the message sent on LINE.
     * @param requestBody Request body parameters.
     * @param channelSecret Encrypted key.
     * @return Verification result. The value true indicates that the verification is successful, and the value false indicates that the verification fails.
     */
    private boolean validateSignature(String signature, String requestBody, String channelSecret) {
        try {
            SecretKeySpec key = new SecretKeySpec(channelSecret.getBytes(StandardCharsets.UTF_8), privateKeyAlgorithm);
            Mac mac = Mac.getInstance(privateKeyAlgorithm);
            mac.init(key);
            byte[] source = requestBody.getBytes(StandardCharsets.UTF_8);
            String encodeResult = Base64.encodeBase64String(mac.doFinal(source));
            return signature.equals(encodeResult);
        } catch (Exception e) {
            log.error("line signature validate exception.", e);
            return false;
        }
    }

Interface Prototype

Request Parameters

Response Parameters

None

Example

• Request

  POST 
  /********************
  Accept: */*
  Host: 10.154.198.164
  Content-Type: application/json;charset=UTF-8
  Content-Length: 185
  {
  	"events": [
  		{
  			"type": "",
  			"mode": "active",
  			"source": 
  				{"type": "user",
  				"userId": "8615897042502"	
  				},
  			"message": {
  				"id":"asdwe145FFUfj",
  				"type": "TEXT",
  				"text": "hello"
  			}
  		}
  		]
  }