iphone - 使用 NSURLConnection 发送 POST 请求

Question

我正在发送一个在请求正文中包含一些参数的 post 请求。

这是 iOS 代码:

 NSURL *url = [NSURL URLWithString:purchaseURL];

 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
 NSString *requestString = [NSString stringWithString:@"userid=1&couponid=1&Ccnum=7b6cd9a44365752cf39c1edf97890b72&Cctype=Visa&Cvv=434&Billingfirstname=Ankit&Billinglastname=Ankit&Street=some&getCity=mycity&State=mystate&getZip=54355&Ccexpmonth=5&Ccexpyear=2012&Phone=43423342"];
NSMutableData *postData=[NSMutableData data];
[postData appendData:[requestString dataUsingEncoding:NSUTF8StringEncoding]];

[request setHTTPMethod:@"POST"];
[request setValue:[NSString stringWithFormat:@"%d", [postData length]] forHTTPHeaderField:@"Content-Length"];
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"];

NSLog(@"content length %d",[postData length]);
[request setValue:@"text/html" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];


NSLog(@"purchage url string %@",postData);

connection=[[NSURLConnection alloc] initWithRequest:request delegate:self];


  NSAssert(self.connection != nil, @"Failure to create URL connection.");

这是将处理发布请求的 php 文件。它处理输入，响应采用 JSON 格式。

 public function restpurchaseAction(Request $request)
 {

    $userid = $_POST['userid'];
    $couponid = $POST['couponid'];



    //Check that email was verified
//Get the user object to compare id to the listed deals id
if(!$user->getEmailVerified())
{
    return "Error:  Must verify email before making a purchase.";
}


// Initialize error varible
$error = "";


//get the currently logged in user
$repository = $this->getDoctrine()
        ->getRepository('FrontendUserBundle:User');
        $user = $repository->findOneByUsername($userid);
//get the coupon that is being purchased
$repository = $this->getDoctrine()
    ->getRepository('FrontendUserBundle:Coupon');
    $coupon = $repository->findOneById($couponid);        

//get the number of times the user has purchased and compare to maxper
$repository = $this->getDoctrine()
->getRepository('FrontendUserBundle:Purchase');     
//if they have already purchased max, redirect to error page
$purchases = $repository->findByCouponAndUser($coupon->getId(), $user->getId());
if(count($purchases) >= $coupon->getMaxper() && $coupon->getMaxper() != 0){
    "Error: Coupon purchased maximum number of times.";
}

//get the users profile
$profile = $user->getProfile();

//get the users address
$address = $profile->getAddress();

//initialize the new purchase
$purchase = new Purchase();

//generate the coupon verification code
$currentdate = new \DateTime();
$currentdate->setTimestamp(time());
$interval = new \DateInterval('P'.$coupon->getExpirationdate().'D');
$currentdate->add($interval);
$validationnumber1 = mt_rand(1000000, 9999999);
$validationnumber2 = mt_rand(1000000, 9999999);
$validationnumber = $validationnumber1 . $validationnumber2;

//set up all the values for the purchase object
$purchase->setValidationnumber($validationnumber);
$purchase->setUser($user);
$purchase->setCoupon($coupon);
$purchase->setValid(true);
$purchase->setValidationattempts(1);
$purchase->setExpirationDate($currentdate);
$card = $purchase->getCard();
$card->setCcnum($_POST['Ccnum']);
$card->setCctype($_POST['Cctype']);
$card->setCvv($_POST['Cvv']);
$card->setUserid($user->getId());

//If the form has already been submitted then check if it is a valid CC.  
//If so, then finish the purchase,else return to the start.
if($request->getMethod() == 'POST'){
    //Get post variables for credit card.

        //Live Mode Credentials
        define("AUTHORIZENET_API_LOGIN_ID", "**********");
        define("AUTHORIZENET_TRANSACTION_KEY", "***************");
        //Test Mode Credentials
        //define("AUTHORIZENET_API_LOGIN_ID", "*************");
        //define("AUTHORIZENET_TRANSACTION_KEY", "*****************");
        define("AUTHORIZENET_SANDBOX", false);
        $response="declined";

        //Make sure maxlimit hasn't been reached before processing.
        if($coupon->getMaxLimit() == 0 || $coupon->getNumPurchased()<=$coupon-                                                                                                                                     >getMaxLimit())
        {

        $sale = new AuthorizeNetAIM;

        /*Input coupon information. */
        $item_id = $coupon->getID();
        $item_name = substr($coupon->getCouponname(), 0, 31);
        $item_description = substr($coupon->getDescription(), 0,255);
        $item_quantity = 1;
        $item_unit_price = $coupon->getPrice();
        $item_taxable = FALSE;
        $billingaddress = $purchase->getBillingaddress();
        $card = $purchase->getCard();

        /*Input customer information. */
        $sale->setField('first_name', $_POST['Billingfirstname']);
        $sale->setField('last_name', $_POST['Billinglastname']);
        $sale->setField('email', $user->getEmail);
        $sale->setField('address', $_POST['Street']);
        $sale->setField('city', $_POST['getCity']);
        $sale->setField('state', $_POST['State']);
        $sale->setField('zip', $_POST['getZip']);
        $sale->setField('phone', $_POST['Phone']);


        /*Add information to the sale */
        $sale->addLineItem($item_id, $item_name, $item_description, $item_quantity, $item_unit_price, $item_taxable);
        $sale->amount = $coupon->getPrice();
        $sale->card_num = $_POST['Ccnum'];
        $sale->exp_date = $_POST['Ccexpmonth'] . '/' . $_POST['Ccexpyear'];
        $sale->setField('card_code', $_POST['Cvv']);

        $response = $sale->authorizeAndCapture();
        if ($response->approved) {
            //Prepersist, make sure to remove CVV, and extra CC digits, only store last 4
            $card->setCvv("");
            $lastfour = substr($card->getCcnum(), -4);
            $card->setCcnum($lastfour);
            $transaction_id = $response->transaction_id;
            $purchase->setId = $transaction_id;
            $coupon->incrementNumPurchased();
            $em = $this->get('doctrine')->getEntityManager();
            $em->persist($purchase);
            $em->persist($coupon);
            $em->flush();
            return "Coupon Purchase Successful!";

    }else{

        $error = $response->error_message;
     }
    }
    else{

        $error = "Maximum number of coupons already purchased!";

    }

 }

return $error;


}

我无法在代码中找到错误或任何问题。我也试过 ASIHttpRequest/ASIFormDataRequest 但无法让它工作。我调用 Web 服务的方式有问题吗？

Answer 1

最简单的调试方法是实际检查启动连接时收到的错误或响应类型。为此，我建议您让您的类实现以下委托(delegate)方法:

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    NSLog(@"Did fail with error %@" , [error localizedDescription]);
}

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    NSHTTPURLResponse *httpResponse;
    httpResponse = (NSHTTPURLResponse *)response;
    int statusCode = [httpResponse statusCode];
    NSLog(@"Status code was %d", statusCode);
}

希望这能让您更好地了解会发生什么。希望对您有所帮助:)