SoapFault exception: Could not connect to host

Question

Sometimes fail to call the web service.

This problem happens all the time.

What could be the problem?

Error:
    SoapFault exception: [HTTP]          


        

Answer 1

For those who struggled the same as me with laravel artisan console command that makes a lot of requests to same wsdl of external soap server and then after some time fails with Could not connect to host error.

The problem was because I was creating new SoapClient instance each time before request was made. Do not do that. Create it once and make each request from the same client.

Hope it helps.

Answer 2

For me it was a certificate problem. Following worked for me

$context = stream_context_create([
    'ssl' => [
        // set some SSL/TLS specific options
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    ]
]);

$client  = new SoapClient(null, [
    'location' => 'https://...',
    'uri' => '...', 
    'stream_context' => $context
]);

Answer 3

Version check helped me OpenSSL. OpenSSL_1_0_1f not supported TSLv.1_2 ! Check version and compatibility with TSLv.1_2 on github openssl/openssl . And regenerate your certificate with new openssl

openssl pkcs12 -in path.p12 -out newfile.pem

P.S I don’t know what they were minus, but this solution will really help.

Answer 4

In my case the host requires TLS 1.2 so needed to enforce using the crypto_method ssl param.

$client = new SoapClient($wsdl,
    array(
           'location' => $location,
           'keep_alive' => false,
           "stream_context" => stream_context_create([
                'ssl' => [
                    'crypto_method' =>  STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT,
                ]
            ]),
           'trace' => 1, // used for debug
        )
    );

Answer 5

It seems the error SoapFault exception: Could not connect to host can be caused be several different things. In my cased it wasn't caused by proxy, firewall or DNS (I actually had a SOAP connection from the same machine working using nusoap without any special setup).

Finally I found that it was caused by an invalid pem file which I referenced in the local_cert option in my SoapClient contructor.

Solution: When I removed the certificate chain from the pem file, so it only contained certificate and private key, the SOAP calls started going through.

Answer 6

In our case, it was a Ciphers negotiation problem. We were getting this error randomly. We solved our problem by forcing a Cipher like this:

$soapClient = new SoapClient ('http://example.com/soap.asmx?wsdl',
    array (
        "stream_context" => stream_context_create (
            array (
                'ssl' => array (
                    'ciphers'=>'AES256-SHA'
                )
            )
        )
    )
);

Looks like PHP wasn't negotiating the same Ciphers at each service call.