javascript 非常简单的jQuery实现，可从USB磁条信用卡读卡器读取卡数据。

Posted 2021-05-04

/**
*
* Simple jQuery Script to parse credit card data
* that was collected via a USB Magnetic Stripe 
* Credit Card Reader.
* 
* To get this to work, focus your cursor (either 
* programmatically or via a click, it's your choice) on an input field #credit-card-number
* and then with the card reader plugged in, swipe
* the card and it will take over from there
*
*/




$(document).ready(function(){
	
	$('#creditCardNumber').click(function(){
		
		//document.getElementById('SwipeNowAlert').innerHTML = 'You may now swipe.';
	
	}).blur(function(){
		
		document.getElementById('SwipeNowAlert').innerHTML = 'Don\'t Swipe';
	  
	}).focus(function(){
	  
		document.getElementById('SwipeNowAlert').innerHTML = 'SWIPE NOW';
	  
	}).keyup(function(event) {
		
		if (event.keyCode == 13) {
		  
			var ccNum =  $('#credit-card-number').val();
		
			var isCaretPresent = false;
			var isEqualPresent = false;
	
			if (ccNum.indexOf("^") != -1)
				isCaretPresent = true
			else
				isCaretPresent = false;
			
			if (ccNum.indexOf("=") != -1)
				isEqualPresent = true
			else
				isEqualPresent = false;
	
			//handle parsing differently depending on card format
			if (isCaretPresent) {
		    
				var cardData = ccNum.split('^');
				
				$("#first-name").val(formatFirstName(cardData[1]));
				$("#last-name").val(formatLastName(cardData[1]));
			
				var decryptedCardNumber = formatCardNumber(cardData[0]);
				
				$("#card-number").val(decryptedCardNumber);
				$("#card-type").val(getCardType(decryptedCardNumber));
				
				$("#expiration-month").val(cardData[2].substring(2, 4));
				$("#expiration-year").val(cardData[2].substring(0, 2));
		
			
			} else if (isEqualPresent) {
		    
				var cardData = ccNum.split('=');
				
				var decryptedCardNumber = formatCardNumber(cardData[0]);
				
				$("#CardNumber").val(decryptedCardNumber);
				$("#CardType").val(getCardType(decryptedCardNumber));
				
				$("#ExpirationMonth").val(cardData[2].substring(2, 4));
				$("#ExpirationYear").val(cardData[2].substring(0, 2));
			}
		
		} else {
			return true;
		}
	}); 
	
	
	function formatCardNumber(cardNum) {
	  
		var result = "";
	
		result = cardNum.replace(/[^0-9]*/, "");
		
		return result;
	}
	
	function formatFirstName(name) {
	  
		if (name.indexOf("/") != -1) {
		  
			var nameSplit = name.split('/');
	
			return nameSplit[1];
			
		} else {
			return "";
		}
	}
	
	function FormatLastName(name) {
	  
		if (name.indexOf("/") != -1) {
		  
			var nameSplit = name.split('/');
	
			return nameSplit[0];
			
		} else {
			return "";
		}
	}
	
	function getCardType(number) {
	  
		var re = new RegExp("^4");
		if (number.match(re) != null)
			return "Visa";
	
		re = new RegExp("^(34|37)");
		if (number.match(re) != null)
			return "American Express";
	
		re = new RegExp("^5[1-5]");
		if (number.match(re) != null)
			return "MasterCard";
	
		re = new RegExp("^6011");
		if (number.match(re) != null)
			return "Discover";
	
		return "";
	}

});