java - Spring MessageConverter HTTP 415响应？

我想使用Spring MVC的MessageConverter实例化一个名为IPNMessage的对象。 SDK link

Paypal IPN消息采用text-plain格式，我想将其反序列化为IPNMessage对象。


  cmd = _notify-validate＆payment_type = instant＆payment_date = Fri Apr 08 2016 = US＆address_zip = 95131＆ADDRESS_STATE = CA＆ADDRESS_CITY =圣何塞＆address_street = 123的任何街道和商业=卖家@ paypalsandbox.com＆RECEIVER_EMAIL =卖家@ paypalsandbox.com＆receiver_id =卖家@ paypalsandbox.com＆residence_country = US＆item_name1 =东西＆item_number1 = AK-1234税额= 2.02＆mc_currency = USD＆mc_fee = 0.44 mc_gross = 12.34＆mc_gross_1 = 12.34＆mc_handling = 2.06＆mc_handling1 = 1.67＆mc_shipping = 3.02＆mc_shipping1 = 1.02＆txn_type = cart＆txn_id = 297973429＆notify_version = 2.1＆custom = xyz123＆invoice = abc1234＆test_ipn = 1＆verify_sign = AFcWxV4B1E7B1E4B1E4B1E7B4E7B0E4B0E4B0E4B0E0E4B0E0E7B0E0E0E0E0B0E0B0C0E0B0茨册_国传


消息转换类：

    public class PaypalIPNHttpMessageConverter extends AbstractHttpMessageConverter<IPNMessage> {

    public PaypalIPNHttpMessageConverter() {
        super(new MediaType("application", "text-plain"), MediaType.ALL);
    }

    @Override
    protected boolean supports(Class<?> clazz) {
        return false;
    }

    @Override
    protected IPNMessage readInternal(Class<? extends IPNMessage> clazz, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {
        //Converts HTTPRequest into map<string,string> that IPNMessage can then parse
        String requestString = IOUtils.toString(inputMessage.getBody(), "UTF-8");
        Map<String, String[]> requestMap = new LinkedHashMap<>();
        for (String keyValue : requestString.split("&")) { //each key value is delimited by &
            String[] pairs = keyValue.split("=", 2); // = pairs a key to a value
            requestMap.put(pairs[0], pairs[1].split(",")); // , splits multiple values for that key
        }
        return new IPNMessage(requestMap);
    }

    @Override
    protected void writeInternal(IPNMessage ipnMessage, HttpOutputMessage outputMessage) throws IOException, HttpMessageNotWritableException {

    }
}

在servlet.xml中配置

<bean class="com.kappa.PaymentController">
    <property name="delegate" ref="paymentService"/>
    <property name="paypalDelegate" ref="paypalIPNService"/>
    <property name="messageConverter" ref="paypalIPNHttpMessageConverter"/>
</bean>

控制器端点

    @Override
@Auditable
@RequestMapping(value = "/processPaypalIPNRequest.do", method = RequestMethod.POST)
@ResponseStatus(value = HttpStatus.OK)
public void processPaypalIPNRequest(@RequestBody IPNMessage ipnMessage) {
    paypalDelegate.processPaypalIPNRequest(ipnMessage);
}

当我触发POST请求时，我收到HTTP 415，说我的请求正文不受支持。

我是否缺少Spring的进一步配置？

注意：我在消息转换器类中放置了断点，但未达到断点，因此此问题在更高级别上出现，但不确定在哪里。

最佳答案

IPNMessage具有一个预期有请求的构造函数。因此，最简单的解决方案是像这样更改您的方法：

public void processPaypalIPNRequest(HttpServletRequest request) {
  paypalDelegate.processPaypalIPNRequest(new IPNMessage(request));
}

如果您想要自己的消息转换器，则理想情况下也可以执行new IPNMessage(request)。