我正在将Paytm PGSDK_V2.0集成到我的android应用中。我已经阅读了有关Github的所有文档。我知道一切。但是问题出在早期的SDK中，我们可以使用Paytm Merchant对象像下面这样简单地生成校验和:
PaytmMerchant merchant=new PaytmMerchant("Checksum generation url","Checksum verification url");
并像这样把它投入服务
Service.initialize(Order,merchant,null);
但是在新的SDK中，它更改为
Service.initialize(Order,null);
所以请帮我如何在新的SDK中生成校验和
最佳答案
Paytm具有更改过程以提高安全性。现在在PGSDK_V2.0中，首先您必须通过在服务器端调用api Checksum Generation来生成
像这样:
@Override
protected String doInBackground(String... params) {
url ="http://xxx.co.in/generateChecksum.php";
JSONParser jsonParser = new JSONParser(MainActivity.this);
param="ORDER_ID=" + orderId+
"&MID="+YourMID+
"&CUST_ID="+custId+
"&CHANNEL_ID=WAP&INDUSTRY_TYPE_ID=Retail110&WEBSITE=xxxwap&TXN_AMOUNT="+billAmt+"&CALLBACK_URL=http://xxx.co.in/verifyChecksum.php";
JSONObject jsonObject = jsonParser.makeHttpRequest(url,"POST",param);
Log.e("CheckSum result >>",jsonObject.toString());
if(jsonObject != null){
Log.d("CheckSum result >>",jsonObject.toString());
try {
CHECKSUMHASH=jsonObject.has("CHECKSUMHASH")?jsonObject.getString("CHECKSUMHASH"):"";
Log.e("CheckSum result >>",CHECKSUMHASH);
} catch (JSONException e) {
e.printStackTrace();
}
}
return null;
}
现在在您的
CHECKSUM中获得onPostExecute字符串后，初始化paytm Service对象并进行进一步处理，如下所示: @Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
progressDialog.hide();
Service = PaytmPGService.getProductionService();
/*PaytmMerchant constructor takes two parameters
1) Checksum generation url
2) Checksum verification url
Merchant should replace the below values with his values*/
//below parameter map is required to construct PaytmOrder object, Merchant should replace below map values with his own values
Map<String, String> paramMap = new HashMap<String, String>();
//these are mandatory parameters
paramMap.put("ORDER_ID", orderId);
//MID provided by paytm
paramMap.put("MID", yourMID);
paramMap.put("CUST_ID", custId);
paramMap.put("CHANNEL_ID", "WAP");
paramMap.put("INDUSTRY_TYPE_ID", "Retail");
paramMap.put("WEBSITE", "xxxwap");
paramMap.put("TXN_AMOUNT",billAmt);
//
paramMap.put("CALLBACK_URL" ,"http://xxx.co.in/verifyChecksum.php");
paramMap.put("CHECKSUMHASH" ,CHECKSUMHASH);
PaytmOrder Order = new PaytmOrder(paramMap);
Service.initialize(Order,null);
Service.startPaymentTransaction(ReviewBooking.this, true, true, new PaytmPaymentTransactionCallback() {
@Override
public void someUIErrorOccurred(String inErrorMessage) {
// Some UI Error Occurred in Payment Gateway Activity.
// // This may be due to initialization of views in
// Payment Gateway Activity or may be due to //
// initialization of webview. // Error Message details
// the error occurred.
}
@Override
public void onTransactionResponse(Bundle inResponse) {
Log.d("LOG", "Payment Transaction : " + inResponse);
String response=inResponse.getString("RESPMSG");
if (response.equals("Txn Successful."))
{
new ConfirmMerchent().execute();
}else
{
Toast.makeText(getApplicationContext(),response,Toast.LENGTH_SHORT).show();
}
Toast.makeText(getApplicationContext(), "Payment Transaction response "+inResponse.toString(), Toast.LENGTH_LONG).show();
}
@Override
public void networkNotAvailable() {
// If network is not
// available, then this
// method gets called.
}
@Override
public void clientAuthenticationFailed(String inErrorMessage) {
// This method gets called if client authentication
// failed. // Failure may be due to following reasons //
// 1. Server error or downtime. // 2. Server unable to
// generate checksum or checksum response is not in
// proper format. // 3. Server failed to authenticate
// that client. That is value of payt_STATUS is 2. //
// Error Message describes the reason for failure.
}
@Override
public void onErrorLoadingWebPage(int iniErrorCode,
String inErrorMessage, String inFailingUrl) {
}
// had to be added: NOTE
@Override
public void onBackPressedCancelTransaction() {
// TODO Auto-generated method stub
}
@Override
public void onTransactionCancel(String inErrorMessage, Bundle inResponse) {
Log.d("LOG", "Payment Transaction Failed " + inErrorMessage);
Toast.makeText(getBaseContext(), "Payment Transaction Failed ", Toast.LENGTH_LONG).show();
}
});
}
JsonParser类
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
HttpURLConnection urlConnection = null;
// variable to hold context
private Context context;
// constructor
public JSONParser(Context context){
this.context=context;
}
public JSONObject makeHttpRequest(String url,String method,String params) {
// boolean isReachable =Config.isURLReachable(context);
// Making HTTP request
try {
String retSrc="";
char current = '0';
URL url1 = new URL(url);
// check for request method
HttpURLConnection urlConnection = (HttpURLConnection) url1.openConnection();
if (method == "POST") {
// request method is POST
urlConnection.setDoOutput(true);
urlConnection.setRequestMethod("POST");
urlConnection.setFixedLengthStreamingMode(params.getBytes().length);
urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
PrintWriter out = new PrintWriter(urlConnection.getOutputStream());
out.print(params);
out.close();
}
InputStream in = urlConnection.getInputStream();
InputStreamReader isw = new InputStreamReader(in);
byte[] bytes = new byte[10000];
StringBuilder x = new StringBuilder();
int numRead = 0;
while ((numRead = in.read(bytes)) >= 0) {
x.append(new String(bytes, 0, numRead));
}
retSrc=x.toString();
jObj = new JSONObject(retSrc);
} catch (Exception e) {
e.printStackTrace();
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
Toast.makeText(context, "Connectivity issue. Please try again later.", Toast.LENGTH_LONG).show();
}
});
return null;
}finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
}
return jObj;
}
}
和参数值应该两次都相同。