file_get_contents problem? (Amazon API + PHP)

JMF · October 18th, 2008, 11:46 PM

Hi,

I'm dipping my feet into some custom stuff with the Amazon store API, and have hit a snag. I'm messing with the following code to generate a list of ASINs related to a given product. That's all it does. Here's the code (it may be a bit inelegant...I'm just learning!)

PHP Code:


			
<?php
//Script to generate similar ASINs to current music review
//Reference: http://docs.amazonwebservices.com/AWSECommerceService/latest/GSG/
          define("Access_Key_ID", "[OMITTED FOR POST]");
          define("Associate_tag", "[OMITTED FOR POST]");


            function get_info($Keywords,$SearchIndex){
                $Operation = "ItemSearch";
                $Version = "2008-08-19";
                $ResponseGroup = "Similarities";

                $request=
                    "http://ecs.amazonaws.com/onca/xml"
                        . "?Service=AWSECommerceService"
                        . "&AssociateTag=" . Associate_tag
                        . "&AWSAccessKeyId=" . Access_Key_ID
                        . "&Operation=" . $Operation
                        . "&Version=" . $Version
                        . "&SearchIndex=" . $SearchIndex
                        . "&Keywords=" . $Keywords
                        . "&ResponseGroup=" . $ResponseGroup;

                //Catch the response in the $response object
                $response = file_get_contents($request);
                $parsed_xml = simplexml_load_string($response);
                $widget_list = make_list($parsed_xml);
                return $widget_list;
            }

function make_list($parsed_xml){
       $i=0;
       foreach($parsed_xml->Items->Item->SimilarProducts->SimilarProduct as $current){
                    $asin_results[$i] = $current->ASIN;
                    $i++ ;
                }

       $list_o_stuff = implode(",",$asin_results);
       return $list_o_stuff;
            }

$widget_asins = get_info("B000I2K9M4","Music");
echo $widget_asins;
            ?>

If I run this locally on my machine, I get the expected output: B0001KL526,B000H7JDZO,B000FS9LKW,B000H0MMKY,B000GU K0HM

(Sorry I can't reproduce it fully here without adding in my Amazon ID and key.)

When I put it in a web page on the server, though, it doesn't work. I can echo the $request string, but when I try to echo the $response, it comes up empty.

Could this have something to do with file_get_contents on my server? Or is it probably something else?

Thanks for any suggestions!
Jeff.

**fury** · October 19th, 2008, 12:54 AM

You could try using cURL instead.

PHP Code:


			
function curl_get_file_contents($request)

    {

        $c = curl_init();

        curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);

        curl_setopt($c, CURLOPT_URL, $request);

        $response = curl_exec($c);

        curl_close($c);

    }

Comment out (//) the current $response line and replace it with that code.

JMF · October 19th, 2008, 9:01 AM

That did the trick, thanks! (Do we know why?)

**twirp** · October 19th, 2008, 4:57 PM

Quote:

Originally Posted by JMF

That did the trick, thanks! (Do we know why?)

allow_url_open is turned off by default for security reasons. You can enable it using a custom php.ini, but it's much safer to use cURL instead.

**fury** · October 20th, 2008, 12:08 AM

Glad I could help!

October 18th, 2008, 11:46 PM	#1 (permalink)
JMF Registered User Seasoned Poster Joined in Jun 2004 Lives in Tennessee, USA Hosted on Pass56 43 posts Gave thanks: 1 Thanked 2 times	file_get_contents problem? (Amazon API + PHP) Hi, I'm dipping my feet into some custom stuff with the Amazon store API, and have hit a snag. I'm messing with the following code to generate a list of ASINs related to a given product. That's all it does. Here's the code (it may be a bit inelegant...I'm just learning!) PHP Code: <?php //Script to generate similar ASINs to current music review //Reference: http://docs.amazonwebservices.com/AWSECommerceService/latest/GSG/ define("Access_Key_ID", "[OMITTED FOR POST]"); define("Associate_tag", "[OMITTED FOR POST]"); function get_info($Keywords,$SearchIndex){ $Operation = "ItemSearch"; $Version = "2008-08-19"; $ResponseGroup = "Similarities"; $request= "http://ecs.amazonaws.com/onca/xml" . "?Service=AWSECommerceService" . "&AssociateTag=" . Associate_tag . "&AWSAccessKeyId=" . Access_Key_ID . "&Operation=" . $Operation . "&Version=" . $Version . "&SearchIndex=" . $SearchIndex . "&Keywords=" . $Keywords . "&ResponseGroup=" . $ResponseGroup; //Catch the response in the $response object $response = file_get_contents($request); $parsed_xml = simplexml_load_string($response); $widget_list = make_list($parsed_xml); return $widget_list; } function make_list($parsed_xml){ $i=0; foreach($parsed_xml->Items->Item->SimilarProducts->SimilarProduct as $current){ $asin_results[$i] = $current->ASIN; $i++ ; } $list_o_stuff = implode(",",$asin_results); return $list_o_stuff; } $widget_asins = get_info("B000I2K9M4","Music"); echo $widget_asins; ?> If I run this locally on my machine, I get the expected output: B0001KL526,B000H7JDZO,B000FS9LKW,B000H0MMKY,B000GU K0HM (Sorry I can't reproduce it fully here without adding in my Amazon ID and key.) When I put it in a web page on the server, though, it doesn't work. I can echo the $request string, but when I try to echo the $response, it comes up empty. Could this have something to do with file_get_contents on my server? Or is it probably something else? Thanks for any suggestions! Jeff.

October 19th, 2008, 12:54 AM	#2 (permalink)
fury Surpass Fan Super #1 Joined in Dec 2005 Lives in MN > USA Hosted on pass84 2,140 posts Gave thanks: 89 Thanked 112 times	You could try using cURL instead. PHP Code: `function curl_get_file_contents($request) { $c = curl_init(); curl_setopt($c, CURLOPT_RETURNTRANSFER, 1); curl_setopt($c, CURLOPT_URL, $request); $response = curl_exec($c); curl_close($c); }` Comment out (//) the current $response line and replace it with that code. __________________ fury™ - not helping the situation since 1987 robmonroe.net \| Twitter \| Foursquare

October 20th, 2008, 12:08 AM	#5 (permalink)
fury Surpass Fan Super #1 Joined in Dec 2005 Lives in MN > USA Hosted on pass84 2,140 posts Gave thanks: 89 Thanked 112 times	Glad I could help! __________________ fury™ - not helping the situation since 1987 robmonroe.net \| Twitter \| Foursquare

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October 19th, 2008, 9:01 AM	#3 (permalink)
JMF Registered User Seasoned Poster Joined in Jun 2004 Lives in Tennessee, USA Hosted on Pass56 43 posts Gave thanks: 1 Thanked 2 times	That did the trick, thanks! (Do we know why?)

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