จะเขียน code หรือแก้ code ครับ ช่วยดูให้หน่อยครับ จาก
Simple Example of PHP software changes to comply with Authenticated / Signed Request / Query to Amazon's AWS / Product Advertising API for affiliate websites - which may affect some homeschool websites.
Amazon documents hint at how to do this, but there's no sample code for PHP programming -
Here's how I got it to work...
// example starts with a typical AWS operation - no keys or timestamp yet
$request = 'Operation=ItemLookup&ResponseGroup=Tags&TagsPerPage=20&Marketplace=us&Version=2008-04-07&ItemId=1604591935';
if ($THE_OLD_UNSIGNED_WAY) {
// Here's the simple unsigned method that works until August 15 2009
$request = '
http://webservices.amazon.com/...eyId=YOUR_ACCESS_ID&'. 
$request;
$response = file_get_contents($request);
if ($response) $simple_response = simplexml_load_string($response);
} else {
// START CHANGES FOR SIGNED REQUEST
// see
http://docs.amazonwebservices....index.html?rest-signature.html for more details
//Substitute your real Access Id here...
$request = 'Service=AWSECommerceService&'.
'AWSAccessKeyId=YOUR_ACCESS_ID&'.
'Timestamp='.gmdate("Y-m-d\TH:i:s\Z").'&'.
$request;
// encode url - replace commas w/ %2C, replace colon w/ %3A
// Could use urlencode($request) here, but $request may already be partially encoded
$request = str_replace(',','%2C', $request);
$request = str_replace(':','%3A', $request);
//break request string into key/value pairs,
$reqarr = explode('&',$request);
//sort on byte value
sort($reqarr);
// tie back together w/ &'s
$string_to_sign = implode("&", $reqarr);
$string_to_sign = "GET\nwebservices.amazon.com\n/onca/xml\n".$string_to_sign;
//Substitute your real Secret Key here...
$signature = urlencode(base64_encode(hash_hmac("sha256", $string_to_sign, 'YOUR_SECRET_KEY', True)));
$request .= '&Signature='.$signature;
$request = '
http://webservices.amazon.com/onca/xml?'. $request;
echo 'NEW REQ '.$request;
// For this example, the above echo should yield:
// NEW REQ
http://webservices.amazon.com/...pfwCtvUuX6ma%2FbUzGFJ4pBO78%3D // - obviously this is a bogus request as we used placeholders for AccessId and SecretKey
$response = file_get_contents($request);
if ($response) $simple_response = simplexml_load_string($response);
// if your signed request is invalid - AWS will give error response such as:
// The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.
// more help at:
1. <?php
2.
3. function aws_signed_request($region, $params, $public_key, $private_key)
4. {
5. /*
6. Copyright (c) 2009 Ulrich Mierendorff
7.
8. Permission is hereby granted, free of charge, to any person obtaining a
9. copy of this software and associated documentation files (the "Software"),
10. to deal in the Software without restriction, including without limitation
11. the rights to use, copy, modify, merge, publish, distribute, sublicense,
12. and/or sell copies of the Software, and to permit persons to whom the
13. Software is furnished to do so, subject to the following conditions:
14.
15. The above copyright notice and this permission notice shall be included in
16. all copies or substantial portions of the Software.
17.
18. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19. IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20. FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21. THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22. LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23. FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24. DEALINGS IN THE SOFTWARE.
25. */
26.
27. /*
28. Parameters:
29. $region - the Amazon(r) region (ca,com,co.uk,de,fr,jp)
30. $params - an array of parameters, eg. array("Operation"=>"ItemLookup",
31. "ItemId"=>"B000X9FLKM", "ResponseGroup"=>"Small")
32. $public_key - your "Access Key ID"
33. $private_key - your "Secret Access Key"
34. */
35.
36. // some paramters
37. $method = "GET";
38. $host = "ecs.amazonaws.".$region;
39. $uri = "/onca/xml";
40.
41. // additional parameters
42. $params["Service"] = "AWSECommerceService";
43. $params["AWSAccessKeyId"] = $public_key;
44. // GMT timestamp
45. $params["Timestamp"] = gmdate("Y-m-d\TH:i:s\Z");
46. // API version
47. $params["Version"] = "2009-03-31";
48.
49. // sort the parameters
50. ksort($params);
51.
52. // create the canonicalized query
53. $canonicalized_query = array();
54. foreach ($params as $param=>$value)
55. {
56. $param = str_replace("%7E", "~", rawurlencode($param));
57. $value = str_replace("%7E", "~", rawurlencode($value));
58. $canonicalized_query[] = $param."=".$value;
59. }
60. $canonicalized_query = implode("&", $canonicalized_query);
61.
62. // create the string to sign
63. $string_to_sign = $method."\n".$host."\n".$uri."\n".$canonicalized_query;
64.
65. // calculate HMAC with SHA256 and base64-encoding
66. $signature = base64_encode(hash_hmac("sha256", $string_to_sign, $private_key, True));
67.
68. // encode the signature for the request
69. $signature = str_replace("%7E", "~", rawurlencode($signature));
70.
71. // create request
72. $request = "http://".$host.$uri."?".$canonicalized_query."&Signature=".$signature;
73.
74. // do request
75. $response = @file_get_contents($request);
76.
77. if ($response === False)
78. {
79. return False;
80. }
81. else
82. {
83. // parse XML
84. $pxml = simplexml_load_string($response);
85. if ($pxml === False)
86. {
87. return False; // no xml
88. }
89. else
90. {
91. return $pxml;
92. }
93. }
94. }
95. ?>
After downloading and extracting aws_signed_request.zip you can include aws_signed_request.php in your PHP scripts. The function contained in this file takes four parameters. $region is the Amazon region (for example "com" or "fr"). $params is an array of parameters with the parameter names as keys. $public_key and $private_key are your keys you have got from Amazon.
Here is an example (you have to replace $public_key and $private_key with your own identifiers)
1. include("aws_signed_request.php");
2.
3. $public_key = "xxxxxx";
4. $private_key = "xxxxxx";
5. $pxml = aws_signed_request("com", array("Operation"=>"ItemLookup","ItemId"=>"B000X9FLKM","ResponseGroup"=>"Small"), $public_key, $private_key);
6. if ($pxml === False)
7. {
8. echo "Did not work.\n";
9. }
10. else
11. {
12. if (isset($pxml->Items->Item->ItemAttributes->Title))
13. {
14. echo $pxml->Items->Item->ItemAttributes->Title, "\n";
15. }
16. else
17. {
18. echo "Could not find item.\n";
19. }
20. }
คือ ไม่รู้เข้ากับกฎของ amazon ณ ปัจจุบันหรือไม่ และต้องปรับแก้อย่างไรครับ และเมื่อเปรียบเทียบกับอีก code คือ
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