I installed php5 on my windows system and tried to execute the following script with a command-line console:
<?php
// load in credentials
$creds = parse_ini_file('/etc/aws.conf');
// Define query string keys/values
$params = array(
'Action' => 'DescribeAvailabilityZones',
'AWSAccessKeyId' => $creds['access_key'],
'Timestamp' => gmdate('Y-m-d\TH:i:s\Z'),
'Version' => '2008-05-05',
'ZoneName.0' => 'us-east-1a',
'ZoneName.1' => 'us-east-1b',
'ZoneName.2' => 'us-east-1c',
'SignatureVersion' => 2,
'SignatureMethod' => 'HmacSHA256'
);
// See docs
// http://tr.im/jbjd
uksort($params, 'strnatcmp');
$qstr = '';
foreach ($params as $key => $val) {
$qstr .= "&{$key}=".rawurlencode($val);
}
$qstr = substr($qstr, 1);
// Signature Version 2
$str = "GET\n"
. "ec2.amazonaws.com\n"
. "/\n"
. $qstr;
// Generate base64-encoded RFC 2104-compliant HMAC-SHA256
// signature with Secret Key using PHP 5's native
// hash_hmac function.
$params['Signature'] = base64_encode(
开发者_如何学编程 hash_hmac('sha256', $str, $creds['secret_key'], true)
);
// simple GET request to EC2 Query API with regular URL
// encoded query string
$req = 'https://ec2.amazonaws.com/?' . http_build_query(
$params
);
$result = file_get_contents($req);
// do something with the XML response
echo $result;
But it says that it's unable to find the wrapper "https" and asks if I forget to enable it when I configured PHP.
What is the problem and how to settle it?
1: Check which wrappers are installed.
<?php var_dump(stream_get_wrappers()); ?>
2: If you dont see "https" on the list, add to/uncomment from php.ini
extension=php_openssl.dll
Restart your server*, and your done.
*if server fails to restart go download php_openssl.dll from someplace and stick it in your extensions directory defined in the php.ini file, restart server, say a few hell mary's and pray.
The file_get_contents
line, at the end of your script, is trying to send an HTTPS request -- see the URL in $req
, which starts by 'https://ec2...'
.
For this to be possible, PHP needs a "wrapper" to send HTTPS requests -- which doesn't seem to be installed on your system ; which means you cannot send HTTPS requests using the fopen
familly of functions.
For more informations about stream wrappers, if you are curious, you can take a look at List of Supported Protocols/Wrappers, and, in your case, HTTP and HTTPS.
You'll either have to install the HTTPs wrapper -- on Windows, I have no idea how to do that, unfortunately...
Or you'll have to use something else that file_get_contents
to send your HTTPS request -- I would use the functions provided by the curl extension (Here, too, not sure it will work "out of the box", though :-( ).
For an example, you can take a look at what's proposed on the manual page of curl_exec
:
// create a new cURL resource
$ch = curl_init();
// set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
curl_setopt($ch, CURLOPT_HEADER, 0);
// grab URL and pass it to the browser
curl_exec($ch);
// close cURL resource, and free up system resources
curl_close($ch);
Note you'll probably have to set a couple more options, using curl_setopt
-- you should go through that page : there are a lot of useful options ;-)
As a sidenote, you are using this line at the beginning of your script :
$creds = parse_ini_file('/etc/aws.conf');
The path /etc/aws.conf
feels strange, as you said you are using a Windows system : this looks like the kind of path one would use on an UNIX/Linux system.
Open php.ini
. Find this line:
;;;;;;;;;;;;;;;;;;;;;;
; Dynamic Extensions ;
;;;;;;;;;;;;;;;;;;;;;;
; ...
;extension=ext/php_oci8.dll
extension=ext/php_openssl.dll ; <---- you want this
;extension=ext/php_pdo_firebird.dll
; ...
you want to uncomment the extension=ext/php_openssl.dll
line. Make sure there is a pho_openssl.dll
file in the ext/
directory, relative to your php.ini
(or maybe more importantly to the extension_dir
variable in the ini).
Simple. I had this error and gave me such headaches. Enable (uncomment the line extension=php_openssl.dll
) in your php.ini file. This will solve the issue.
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