Question

我在我的应用程序中使用App购买。我正在向服务器发送请求，以使用以下方法验证所购买产品的交易收据：

-(void)sendingRequestForReceipt: (SKPaymentTransaction *)transaction{
    networkQueue = [ASINetworkQueue queue];
    [networkQueue retain];
    NSString *serverUrl = @"https://sandbox.itunes.apple.com/";
    NSString *receiptStr= [Base64Encoding base64EncodingForData:(transaction.transactionReceipt) WithLineLength:0];
NSString *str = [NSString stringWithFormat:@"%@verifyReceipt", serverUrl];
    NSURL *url = [NSURL URLWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    ASIHTTPRequest *request = [[[ASIHTTPRequest alloc] initWithURL:url] autorelease];

    NSDictionary* data = [NSDictionary dictionaryWithObjectsAndKeys:receiptStr,@"receipt-data", nil];
[request appendPostData: [[data JSONRepresentation] dataUsingEncoding:NSUTF8StringEncoding]];
    [request setRequestMethod:@"POST"];
    [request setDelegate:self];
    [request setDidFinishSelector: @selector(gotReceiptResponse:)];


    [networkQueue addOperation: request];
    [networkQueue go];
}

在此之后调用以下gotReceiptResponse方法：

- (void)gotReceiptResponse:(ASIHTTPRequest *)req{

    NSString *response=[req responseString];
NSDictionary *jsonResp = [response JSONValue];
    NSString *receiptValue = [jsonResp valueForKey:@"status"];
    int receiptCheck=[receiptValue intValue];
if( receiptCheck ==0){
        //mark item as purchased
        //show alert that item was purchased and will be downloaded
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle :@"In-App-Purchase:"
                                                         message:@"The instrumental was purchased successfully and will now be downloaded. "
                                                                 "Please do not close the app till download is complete"
                                                       delegate :self cancelButtonTitle:@"OK"otherButtonTitles:nil];
        [alert show];
        [alert release];
}
}

我响应得到的值是例如：\ u008bb \ u0095 \ u008f \ u00b1 \ u008e \ u00c20D {\ u00be“RM \ u0082bc \ u00d2 \ u009f \ u00a8 \ u00e8 \ u00e8 \ u00a3 = \ u00c7 \ u00ca \ u00adD \ u00ec \ u009c \ u00bdFB（\ u00ffN \ u00ae转移\ u00a1B \ U00B7 \ u00dd \ u00ce＆GT; \ u00cd \ u00ec＆10 6，XCQ“\ u00d6＆GT; \ u0092; \ u00ecY \ u00cb \ u009aF）\ u00a5 \ u00eb \ u00c3 \ u0091m \ u00e6 \ u00e8 \ u00e0 \ u00daQ \ u00c1z \ u00f7 \ u00c2 \ u00ff \ u009bFH- \ u00a4 \ u00cc \ u00f4 \ u00f7- \ u00c4 | \ u00aax \ u00de \ u00a6 \ u00e0 \ u00fbd \ u00e8 \ u0085 \ u00ef \ u008fJ \ u00adb

\ u00e6 \ u00a2 \ u00e2 \ u00e2 \ u00e4 \ u002 \ u002 \ u006 \ u006 \ u006 \ u006 \ u00ad \ u00ad \ u00ad \ u00ad \ u00ad \ u00d \ u00ad \ u00d \ u00d \ u00c \ u00c \ u00c \ u00c \ u00c \ u00 \ u00ba＆安培; \ u00acf \ u00c6 \ u008f \ u00d5 \ u00ef \ u00b0 \ u00fd \ u0090 \ u00ae转移\ u0091R \ u008f \ u00fe \ u00ed \ u00e3＆安培;} 8 / T $ \ u00a0 \ u00b4t \ u00e4 \ u00f3M \ u00f9` ？

并且在jsonResp中，该值为null。所以我只想知道如何编码这个unicode字符串。这样我就可以理解我得到的响应是什么，以及jsonResp中空值的原因。

Answer 1

使用[req responseData]通过使用以下方式手动对原始数据进行编码：

NSString *resultString = [[NSString alloc] initWithData:[req responseData] encoding:NSUTF8StringEncoding];
//This is a simple validation. It's only checking if there is a '"status":0' string in the resultString.
if([resultString rangeOfString:@"\"status\":0"].location != NSNotFound)
  resultStatus = 0;

[resultString release];
return (resultStatus == 0);

如果您需要进一步的验证信息，您必须使用JSON解析器并解析resultString。

如何解释应用内购买验证收据请求的服务器响应？

1 个答案: