Access Exchange Web Services with PHP and cURL

Question

Hello,

I am currently writing a client to access a Microsoft Exchange server and read contacts, appointments etc. from it.

Through days of searching I\'ve be

Answer 1

Your first check should not use any complex scripting. Instead try opening the WDSL from a simple browser window on the Debian machine like so: https://your.exchange-server.com/EWS/Services.wsdl

If that does not work there are probably access restrictions in place that depend on the client IP or client network (e.g. your development machine being in a trusted network, your Debian not). The fact that you get a 401 ("Unauthorized" - request requires user authentication) suggests that there is no problem with contacting the server but with authentication.

Another check I suggest is that you have a look into your phpinfo() to make sure your PHP installation on Debian is capable of handling HTTP*S* requests. Make sure, OpenSSL is installed!

Answer 2

If you initialize your soap client properly, you should be able to preform any requests requests this way:

$curl = curl_init($location); //'https://'.$server_address.'/EWS/Exchange.asmx'
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); //valid soap headers with keep-alive
curl_setopt($ch, CURLOPT_POST, true );
curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_USERPWD, $user.':'.$password);
$response = curl_exec($curl);

As to your code, try commenting out following line:

curl_setopt( $curl, CURLOPT_HTTPAUTH, CURLAUTH_NTLM );

Also take a look wherever this wrapper works on your setup: http://ewswrapper.lafiel.net/ If it does, take a look at SOAP classes used there - it uses php built-in as base.

Why can't you store wsdl file locally anyways?

---

UPDATE:

Ok, I played around with this in my Debian box and this works for me flawlessly:

$domain = 'xxxxxx';
$user = 'xxxxxx';
$password = 'xxxxxx';
$ch = curl_init('https://'.$domain.'/EWS/Services.wsdl'); 
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_USERPWD, $user.':'.$password);
$response = curl_exec($ch);
$info = curl_getinfo( $ch );
$error =  curl_error ($ch);
print_r(array($response,$info,$error));

returns

Array
(
    [0] => <?xml version="1.0" encoding="utf-8"?>
<wsdl:definitions 
(...)
</wsdl:definitions>
    [1] => Array
        (
            [url] => xxxxx/EWS/Services.wsdl
            [content_type] => text/xml
            [http_code] => 200
            [header_size] => 250
            [request_size] => 147
            [filetime] => -1
            [ssl_verify_result] => 0
            [redirect_count] => 0
            [total_time] => 0.60574
            [namelookup_time] => 0.165249
            [connect_time] => 0.268173
            [pretransfer_time] => 0.474009
            [size_upload] => 0
            [size_download] => 55607
            [speed_download] => 91800
            [speed_upload] => 0
            [download_content_length] => 55607
            [upload_content_length] => 0
            [starttransfer_time] => 0.580931
            [redirect_time] => 0
            [certinfo] => Array
                (
                )

            [redirect_url] => 
        )

    [2] => 
)

Answer 3

This article helped point me in the right direction. One thing to keep in mind is that your PHP installation may not be sharing your system's cURL / libcurl setup.

http://blog.ianty.com/ubuntu/exchange-web-services-ews-ntlmv2-and-linux/