貝寶php github示例代碼始終出錯？

Question

我正在研究Paypal IPN功能，這是本周急需的功能。

我從以下網址獲得了示例php代碼： https ： //github.com/paypal/ipn-code-samples

我實際上可以從沙盒中獲得一條已驗證的消息。 但在示例代碼行79中，從

if (curl_errno($ch) != 0) // cURL error

無論響應是什么，似乎都記錄錯誤。 我發現$ res存儲完整的響應標頭，而不是僅存儲“ VERIFIED”或“ INVALID”。

我不知道這是我自己的問題還是代碼的問題。

為了使我的實施工作順利進行，我可以設法在$ res中得到最后的答案，但確實希望得到一些專家的解釋。 非常感謝！

<?php

// CONFIG: Enable debug mode. This means we'll log requests into 'ipn.log' in the same directory.
// Especially useful if you encounter network errors or other intermittent problems with IPN (validation).
// Set this to 0 once you go live or don't require logging.
define("DEBUG", 1);

// Set to 0 once you're ready to go live
define("USE_SANDBOX", 1);


// Read POST data
// reading posted data directly from $_POST causes serialization
// issues with array data in POST. Reading raw POST data from input stream instead.
$raw_post_data = file_get_contents('php://input');
$raw_post_array = explode('&', $raw_post_data);
$myPost = array();
foreach ($raw_post_array as $keyval) {
    $keyval = explode ('=', $keyval);
    if (count($keyval) == 2)
        $myPost[$keyval[0]] = urldecode($keyval[1]);
}
// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
if(function_exists('get_magic_quotes_gpc')) {
    $get_magic_quotes_exists = true;
}
foreach ($myPost as $key => $value) {
    if($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) {
        $value = urlencode(stripslashes($value));
    } else {
        $value = urlencode($value);
    }
    $req .= "&$key=$value";
}

// Post IPN data back to PayPal to validate the IPN data is genuine
// Without this step anyone can fake IPN data

if(USE_SANDBOX == true) {
    $paypal_url = "https://www.sandbox.paypal.com/cgi-bin/webscr";
} else {
    $paypal_url = "https://www.paypal.com/cgi-bin/webscr";
}

$ch = curl_init($paypal_url);
if ($ch == FALSE) {
    return FALSE;
}

curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);

if(DEBUG == true) {
    curl_setopt($ch, CURLOPT_HEADER, 1);
    curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
}

// CONFIG: Optional proxy configuration
//curl_setopt($ch, CURLOPT_PROXY, $proxy);
//curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);

// Set TCP timeout to 30 seconds
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));

// CONFIG: Please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set the directory path
// of the certificate as shown below. Ensure the file is readable by the webserver.
// This is mandatory for some environments.
// $cert = "./cacert.pem";
//curl_setopt($ch, CURLOPT_CAINFO, $cert);

$res = curl_exec($ch);
if (curl_errno($ch) != 0) // cURL error
    {
    if(DEBUG == true) { 
        error_log(date('[Y-m-d H:i e] '). "Can't connect to PayPal to validate IPN message: " . curl_error($ch) . "\r\n", 3, "./ipn.log");
    }
    curl_close($ch);

} else {
        // Unexpected error occured. We were able to connect to PayPal, but we didn't get INVALID or VERIFIED back. Log the entire HTTP response if debug is switched on.
        if(DEBUG == true) {
            error_log(date('[Y-m-d H:i e] '). "HTTP request of validation request:". curl_getinfo($ch, CURLINFO_HEADER_OUT) ." for IPN payload: $req\r\n", 3, "./ipn.log");
            error_log(date('[Y-m-d H:i e] '). "HTTP response of validation request:". $res ."\r\n", 3, "./ipn.log");
        }
        curl_close($ch);
}

// Inspect IPN validation result and act accordingly

if (strcmp ($res, "VERIFIED") == 0) {
    // check whether the payment_status is Completed
    // check that txn_id has not been previously processed
    // check that receiver_email is your PayPal email
    // check that payment_amount/payment_currency are correct
    // process payment and mark item as paid.

    // assign posted variables to local variables
    //$item_name = $_POST['item_name'];
    //$item_number = $_POST['item_number'];
    //$payment_status = $_POST['payment_status'];
    //$payment_amount = $_POST['mc_gross'];
    //$payment_currency = $_POST['mc_currency'];
    //$txn_id = $_POST['txn_id'];
    //$receiver_email = $_POST['receiver_email'];
    //$payer_email = $_POST['payer_email'];

    if(DEBUG == true) {
        error_log(date('[Y-m-d H:i e] '). "Verified IPN: $req \r\n", 3, "./ipn.log");
    }
} else if (strcmp ($res, "INVALID") == 0) {
    // log for manual investigation
    // Add business logic here which deals with invalid IPN messages
    if(DEBUG == true) {
        error_log(date('[Y-m-d H:i e] '). "Invalid IPN: $req \r\n", 3, "./ipn.log");
    }
}

?>

Answer 1

Paypal示例有點笨拙。 如您所說，do會以錯誤的方式處理錯誤，但是從請求構建“ echo”的方式效率不高。

這是我的版本。 有一些Codeigniter細節，但是您仍然可以將其用作示例：

public function ipn_callback( )
{
    $IPN_url = config_item( 'paypal_ipn_url' );

    // --------------------------------------------------------------------------------
    // Read POST data directly from $_POST causes serialization
    // issues with array data in POST. Reading raw POST data from input stream instead.
    // --------------------------------------------------------------------------------

    $req = 'cmd=_notify-validate&' . file_get_contents( "php://input" );

    $ch = curl_init( $IPN_url );
    if ( $ch == FALSE )
    {
        log_message( 'error', "Problems opening IPN url: " . $IPN_url );
        return FALSE;
    }
    curl_setopt( $ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 );
    curl_setopt( $ch, CURLOPT_PORT, config_item( 'paypal_ipn_port' ) );
    curl_setopt( $ch, CURLOPT_POST, 1 );
    curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
    curl_setopt( $ch, CURLOPT_POSTFIELDS, $req );
    curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 1 );
    curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, 2 );
    curl_setopt( $ch, CURLOPT_FORBID_REUSE, 1 );
    curl_setopt( $ch, CURLOPT_HEADER, 1 );
    curl_setopt( $ch, CURLINFO_HEADER_OUT, 1 );
    curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, 30 );
    curl_setopt( $ch, CURLOPT_HTTPHEADER, array( 'Connection: Close' ) );

    // CONFIG: Optional proxy configuration
    //curl_setopt($ch, CURLOPT_PROXY, $proxy);
    //curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);

    // CONFIG: Please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set the directory path
    // of the certificate as shown below. Ensure the file is readable by the webserver.
    // This is mandatory for some environments.
    // $cert = "./cacert.pem";
    //curl_setopt($ch, CURLOPT_CAINFO, $cert);

    $res = curl_exec( $ch );
    if ( $res === FALSE )
    {
        log_message( 'error', "Can't connect to PayPal to validate IPN message: " . curl_error( $ch )  );
        curl_close( $ch );
        return;
    }

    // -------------------------------------------------------
    // Inspect IPN validation result and act accordingly
    // -------------------------------------------------------

    if ( strrpos( $res, "VERIFIED" ) !== FALSE )
    {
        try
        {
            // call the tnx_type handler, format: $this->ipn_<txn_type>( $args )
            if ( call_user_func_array( array( $this, 'ipn_' . $_POST[ 'txn_type' ] ), array( $_POST ) ) === FALSE )
            {
                throw new Exception( "unsupported txn_type" );
            }
        }
        catch( Exception $e )
        {
            log_message( 'error', "Unhandled IPN: " . $e->getMessage() );
            log_message( 'error', $req );
        }
    }
    else if ( strrpos( $res, "INVALID" ) !== FALSE )
    {
        log_message( 'error', "Invalid IPN: $req" );
    }
    else
    {
        // -------------------------------------------------------------------------------
        // Unexpected error occured. We were able to connect to PayPal, but we didn't get
        // INVALID or VERIFIED back. Log the entire HTTP
        // -------------------------------------------------------------------------------

        log_message( 'error', "HTTP request of validation request:" . curl_getinfo( $ch, CURLINFO_HEADER_OUT ) . " for IPN payload: $req" );
        log_message( 'error', "HTTP response of validation request: $res" );
    }
    curl_close( $ch );
}