PAYUIntegrationCustomBrowser

PAYU Custom Browser Integration in iOS

Prerequisites:

1	Add libz.tbd libraries into your project (Project->Build Phases->Link Binary With Libraries)

2	Add -ObjC and $(OTHER_LDFLAGS)in Other Linker Flags in Project Build Settings(Project->Build Settings->Other Linker Flags)

3	To run the app on iOS9, please add the below code in info.plist
NSAppTransportSecurity NSAllowsArbitraryLoads

Steps :

1. Setup Webview in a view controller

2. Setup the initial Parameters required to create a POST request

Sample :

In Test Mode : KEY : “gtKFFx” SALT : “eCwWELxi”

In Production Mode : KEY : Generate your key from PayU Money portal SALT : Generate your key from PayU Money portal

txnid1 = [NSString stringWithFormat:@"%ld", arc4random() % 9999999999];
totalPriceAmount = @"10";
merchantKey = KEY;
salt = SALT;
PayUBaseUrl = PAYU_BASE_URL;

productInfo = @"MyApp";
firstName = @"John";
email = @"pulkit29@gmail.com";
phone = @"9884588487";
successUrl = @"http://www.google.com/"; // Your Success URL
failureUrl = @"http://www.bing.com/";   // Your Failure URL
service_provider = @"payu_paisa";

3. Create Hash using the below Formula // Create it on server side for Security Purpose

Sample :

NSString * hashValue = [NSString stringWithFormat:@"%@|%@|%@|%@|%@|%@|||||||||||%@",merchantKey,txnid1,totalPriceAmount,productInfo,firstName,email,salt];

NSString * hash = [self createSHA512:hashValue]

// User this function to create SHA512 in Objective C

-(NSString *)createSHA512:(NSString *)string { const char *cstr = [string cStringUsingEncoding:NSUTF8StringEncoding]; NSData data = [NSData dataWithBytes:cstr length:string.length]; uint8_t digest[CC_SHA512_DIGEST_LENGTH]; CC_SHA512(data.bytes, (CC_LONG)data.length, digest); NSMutableString output = [NSMutableString stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2]; for(int i = 0; i < CC_SHA512_DIGEST_LENGTH; i++) { [output appendFormat:@"%02x", digest[i]]; } return output; }

4. Create a POST request using above parameters

Sample :

NSDictionary *parameters = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:txnid1,merchantKey,totalPriceAmount,productInfo,firstName,email,phone,successUrl,failureUrl,hash,service_provider , nil] forKeys:[NSArray arrayWithObjects:@"txnid",@"key",@"amount",@"productinfo",@"firstname",@"email",@"phone",@"surl",@"furl",@"hash",@"service_provider", nil]]; __block NSString *post = @""; [parameters enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) { if ([post isEqualToString:@""]) { post = [NSString stringWithFormat:@"%@=%@",key,obj]; } else { post = [NSString stringWithFormat:@"%@&%@=%@",post,key,obj]; } }];

// Creating a POST Request
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)[postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@/_payment",PayUBaseUrl]]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Current-Type"];
[request setHTTPBody:postData];

5. Load request in the browser

Sample :

[_webView loadRequest:request];

6. Handle Webview delegates

Sample :

• (void)webViewDidStartLoad:(UIWebView *)webView{ NSLog(@"webViewDidStartLoad"); }

-(void)webViewDidFinishLoad:(UIWebView *)webView{

[activityIndicatorView stopAnimating];

if (webView.isLoading) {
    return;
}

NSURL * requestURL = self.webView.request.URL;
NSString * requestString = [requestURL absoluteString];
if ([requestString containsString:successUrl]){
    NSLog(@"success payment done");

// Handle Success screen here
    
}
else if ([requestString containsString:failureUrl]
         ){
    NSLog(@"payment failure");

// Handle Failure screen here
}

}

-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{ NSURL * requestURL = self.webView.request.URL; [NSString stringWithFormat:@"WebView failed loading with requestURL: %@ with error: %@ error code: %@", requestURL, error.localizedDescription, error];

if (error.code == -1009 || error.code == -1003) {
    NSLog(@"Please check your internet connection!");
}else if (error.code == -1001) {
    NSLog(@"The request timed out.");
}

}