我正在集成Paytm PGSDK_V2.0到我的 android 应用程序中。我已阅读Github上的所有文档。我已经了解一切。但问题出在其早期的 SDK 中，我们可以简单地使用Paytm Merchant对象生成校验和，例如：
PaytmMerchant merchant=new PaytmMerchant("Checksum generation url","Checksum verification url");
并将其放入服务中
Service.initialize(Order,merchant,null);
但在新的 SDK 中它变为
Service.initialize(Order,null);
所以请帮助我如何在新的 SDK 中生成校验和
Paytm has change process to increase the security. now in PGSDK_V2.0 first you have to generate through calling the api Checksum Generation on your server side
Like this:
@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;
}
now after getting CHECKSUM string in your onPostExecute initialize paytm Service object and do further process Like This:
@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 Class
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;
}
}
and parameter values should be same both time.
生成校验和非常容易。
下面你可以看到一个改造 api 代码示例，用于将 POST 请求发送到generateChecksum.php。
//this is the URL of the paytm folder that we added in the server
//make sure you are using your ip else it will not work
String BASE_URL = "http://192.168.101.1/paytm/";
@FormUrlEncoded
@POST("generateChecksum.php")
Call<Checksum> getChecksum(
@Field("MID") String mId,
@Field("ORDER_ID") String orderId,
@Field("CUST_ID") String custId,
@Field("CHANNEL_ID") String channelId,
@Field("TXN_AMOUNT") String txnAmount,
@Field("WEBSITE") String website,
@Field("CALLBACK_URL") String callbackUrl,
@Field("INDUSTRY_TYPE_ID") String industryTypeId
);
这部分非常重要，您必须发送所有参数。并且 order_id 每次都应该是唯一的。
您只需传递 8 个参数即可从 SDK 2.0 及更高版本生成校验和。在早期版本中，您还需要传递电子邮件和手机号码。现在没有使用这些参数。首先在您的服务器上上传 PHP 文件并更改 lib 文件夹内 config.php 文件中的商家密钥。现在从 android 使用可以使用改造或凌空或 httpconnection 请求从您的服务器获取校验和。这里我使用 Httpconnection（在这段代码中 JSONParse 是一个单独的 java 类来调用 httpconnection）。您可以在此链接上获得参考 - http://www.blueappsoftware.in/android/blog/paytm-integration-sdk-2-1-android/
public class sendUserDetailTOServerdd extends AsyncTask<ArrayList<String>, Void, String> {
private ProgressDialog dialog = new ProgressDialog(checksum.this);
private String orderId , mid, custid, amt;
String url ="http://www.blueappsoftware.com/payment/payment_paytm/generateChecksum.php";
String varifyurl = // "https://securegw.paytm.in/theia/paytmCallback?ORDER_ID=<ORDER_ID>"; //
"https://pguat.paytm.com/paytmchecksum/paytmCallback.jsp";//
String CHECKSUMHASH ="";
@Override
protected void onPreExecute() {
this.dialog.setMessage("Please wait");
this.dialog.show();
// initOrderId();
orderId ="KK100343"; // NOTE : order id must be unique
mid = "blueap01867059473586"; // CREATI42545355156573
custid = "KKCUST0342";
}
protected String doInBackground(ArrayList<String>... alldata) {
// String url ="http://xxx.co.in/generateChecksum.php";
JSONParser jsonParser = new JSONParser(checksum.this);
String param=
"MID="+mid+
"&ORDER_ID=" + orderId+
"&CUST_ID="+custid+
"&CHANNEL_ID=WEB&TXN_AMOUNT=100&WEBSITE=www.blueappsoftware.in"+"&CALLBACK_URL="+ varifyurl+"&INDUSTRY_TYPE_ID=Retail";
Log.e("checksum"," param string "+param );
JSONObject jsonObject = jsonParser.makeHttpRequest(url,"POST",param);
// yaha per checksum ke saht order id or status receive hoga..
Log.e("CheckSum result >>",jsonObject.toString());
if(jsonObject != null){
Log.e("CheckSum result >>",jsonObject.toString());
try {
CHECKSUMHASH=jsonObject.has("CHECKSUMHASH")?jsonObject.getString("CHECKSUMHASH"):"";
Log.e("CheckSum result >>",CHECKSUMHASH);
} catch (JSONException e) {
e.printStackTrace();
}
}
return CHECKSUMHASH;
}
@Override
protected void onPostExecute(String result) {
// jab run kroge to yaha checksum dekhega
///ab service ko call krna hai
Log.e(" setup acc "," signup result " + result);
if (dialog.isShowing()) {
dialog.dismiss();
}}
第 2 步）现在 onPostExceute 方法你有校验和作为结果。是时候调用 paytm 暂存服务并调用开始交易了。下面是调用paytm服务的代码
PaytmPGService Service =PaytmPGService.getStagingService();
// when app is ready to publish use production service
// PaytmPGService Service = PaytmPGService.getProductionService();
// now call paytm service here
//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
// ye sari valeu same hon achaiye
//MID provided by paytm
paramMap.put("MID", mid);
paramMap.put("ORDER_ID", orderId);
paramMap.put("CUST_ID", custid);
paramMap.put("CHANNEL_ID", "WEB");
paramMap.put("TXN_AMOUNT", "100");
paramMap.put("WEBSITE", "www.blueappsoftware.in");
paramMap.put("CALLBACK_URL" ,varifyurl);
//paramMap.put( "EMAIL" , "abc@gmail.com"); // no need
// paramMap.put( "MOBILE_NO" , "9144040888"); // no need
paramMap.put("CHECKSUMHASH" ,CHECKSUMHASH);
//paramMap.put("PAYMENT_TYPE_ID" ,"CC"); // no need
paramMap.put("INDUSTRY_TYPE_ID", "Retail");
PaytmOrder Order = new PaytmOrder(paramMap);
Log.e("checksum ", paramMap.toString());
Service.initialize(Order,null);
// start payment service call here
Service.startPaymentTransaction(checksum.this, true, true, checksum.this );
什么是新的 ConfirmMerchent().execute(); 并在商家验证后的文档中再次检查此 uri 以进行付款确认 https://secure.paytm.in/oltp/HANDLER_INTERNAL/TXNSTATUS