Getting error "InvalidAddress" while submitting Amazon MWS CreateInboundShipmentPlan [closed] - php

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I am using Amazon MWS CreateInboundShipmentPlan to create shipment plan and it is working quite good if I limit my product under 23-24 but If I try to submit more than 24 it gives me InvalidAddress error.
I am using PHP API to submit a request to Amazon MWS. In initial troubleshoot I think its all about the URL length because if I increase the URL length by adding more SKU's it starts giving problem.
If I try with limited number of SKU's I get successful result.
But if I try with more SKU's it gives me
[Error] => Array
(
[Type] => Sender
[Code] => InvalidAddress
[Message] => Resource /errors/mws.amazonservices.com/500.html is not found on this server.
)
Here is my PHP code.
function amazon_CreateInboundShipmentPlan($amazonAWSAccessKeyId,$amazonSellerId,$amazonMWSAuthToken,$amazonMarketPlaceId,$amazonSecretKey,$domain,$extras){
$param = array();
$param['AWSAccessKeyId'] = $amazonAWSAccessKeyId;
$param['Action'] = 'CreateInboundShipmentPlan';
$param['SellerId'] = $amazonSellerId;
$param['MWSAuthToken'] = $amazonMWSAuthToken;
$param['SignatureMethod'] = 'HmacSHA256';
$param['SignatureVersion'] = '2';
$param['Timestamp'] = gmdate("Y-m-d\TH:i:s.\\0\\0\\0\\Z", time());
$param['Version'] = '2010-10-01';
$param = array_merge($param,$extras);
$secret = $amazonSecretKey;
$url = array();
foreach ($param as $key => $val) {
$key = str_replace("%7E", "~", rawurlencode($key));
$val = str_replace("%7E", "~", rawurlencode($val));
$url[] = "{$key}={$val}";
}
$amazon_feed = '';
sort($url);
$arr = implode('&', $url);
$sign = 'POST' . "\n";
$sign .= 'mws.amazonservices.'.$domain.'' . "\n";
$sign .= '/FulfillmentInboundShipment/'.$param['Version'].'' . "\n";
$sign .= $arr;
$signature = hash_hmac("sha256", $sign, $secret, true);
$httpHeader = array();
$httpHeader[] = 'Transfer-Encoding: chunked';
$httpHeader[] = 'Content-Type: application/xml';
$httpHeader[] = 'Content-MD5: ' . base64_encode(md5($amazon_feed, true));
$httpHeader[] = 'Expect:';
$httpHeader[] = 'Accept:';
$signature = urlencode(base64_encode($signature));
$link = "https://mws.amazonservices.".$domain."/FulfillmentInboundShipment/".$param['Version']."?";
$link .= $arr . "&Signature=" . $signature;
echo strlen($link)."\n";
$ch = curl_init($link);
curl_setopt($ch, CURLOPT_HTTPHEADER, $httpHeader);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $amazon_feed);
$response = curl_exec($ch);
$info = curl_getinfo($ch);
$errors=curl_error($ch);
curl_close($ch);
$xml = simplexml_load_string($response);
$json = json_encode($xml);
$array = json_decode($json,TRUE);
return $array;
}
I think there is some problem with the URL length. Please help me to figure out what's exactly wrong with this code.

Answer 1

I finally figure out the problem. Its a url limit problem I changed my method of posting data from GET to POST and it resolved the issue.