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I have a website which frequently makes SOAP calls to a particular API. The site was working fine for a few months of time, however the SOAP functionality suddenly stopped working without any known reason, the error was "Cannot connect to host".
The WSDL service has not moved or shut down.
After this I updated plesk from version 12 to version 17. SOAP client is still not working but now its a different error:
SOAP-ERROR: Parsing WSDL: Couldn't load from (URL) : failed to load external entity (URL)
This is my SOAP call:
$opts = array('http'=>array('user_agent' => 'PHPSoapClient'));
$context = stream_context_create($opts);
libxml_disable_entity_loader(false);
$client = new SoapClient($url,array('stream_context' => $context,'cache_wsdl' => WSDL_CACHE_NONE));
Any possible solutions?
EDIT:
New information came in, so the API server had DNS problems, how can I restore my connection to the API?
Your php server is clearly not reaching out the soap server. This might help:
Try checking directly from php server if the service are reachable:
wget {url} > page.txt
nano (or equivalent) page.txt
Try using other program to consume the server, I suggest Soap Ui
On the php server try ping the service url and see if the IP is resolved.
Check if any other soap service is reachable, you can use this service
If this not help you coming up with a solution, post here the results to help others solving it.
This works fine on my WAMP server, but doesn't work on the linux master server!?
try{
$client = new SoapClient('http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl', ['trace' => true]);
$result = $client->checkVat([
'countryCode' => 'DK',
'vatNumber' => '47458714'
]);
print_r($result);
}
catch(Exception $e){
echo $e->getMessage();
}
What am I missing here?! :(
SOAP is enabled
Error
SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl' : failed to load external entity "http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl"/taxation_customs/vies/checkVatService.wsdl"
Call the URL from PHP
Calling the URL from PHP returns error
$wsdl = file_get_contents('http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl');
echo $wsdl;
Error
Warning: file_get_contents(http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl): failed to open stream: HTTP request failed! HTTP/1.0 503 Service Unavailable
Call the URL from command line
Calling the URL from the linux command line HTTP 200 is returned with a XML response
curl http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl
For some versions of php, the SoapClient does not send http user agent information. What php versions do you have on the server vs your local WAMP?
Try to set the user agent explicitly, using a context stream as follows:
try {
$opts = array(
'http' => array(
'user_agent' => 'PHPSoapClient'
)
);
$context = stream_context_create($opts);
$wsdlUrl = 'http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl';
$soapClientOptions = array(
'stream_context' => $context,
'cache_wsdl' => WSDL_CACHE_NONE
);
$client = new SoapClient($wsdlUrl, $soapClientOptions);
$checkVatParameters = array(
'countryCode' => 'DK',
'vatNumber' => '47458714'
);
$result = $client->checkVat($checkVatParameters);
print_r($result);
}
catch(Exception $e) {
echo $e->getMessage();
}
Edit
It actually seems to be some issues with the web service you are using. The combination of HTTP over IPv6, and missing HTTP User Agent string, seems to give the web service problems.
To verify this, try the following on your linux host:
curl -A '' -6 http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl
this IPv6 request fails.
curl -A 'cURL User Agent' -6 http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl
this IPv6 request succeeds.
curl -A '' -4 http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl
curl -A 'cURL User Agent' -4 http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl
both these IPv4 request succeeds.
Interesting case :) I guess your linux host resolves ec.europa.eu to its IPv6 address, and that your version of SoapClient did not add a user agent string by default.
Security issue: This answer disables security features and should not be used in production!
Try this. I hope it helps
$options = [
'cache_wsdl' => WSDL_CACHE_NONE,
'trace' => 1,
'stream_context' => stream_context_create(
[
'ssl' => [
'verify_peer' => false,
'verify_peer_name' => false,
'allow_self_signed' => true
]
]
)
];
$client = new SoapClient($url, $options);
This issue can be caused by the libxml entity loader having been disabled.
Try running libxml_disable_entity_loader(false); before instantiating SoapClient.
It may be helpful for someone, although there is no precise answer to this question.
My soap url has a non-standard port(9087 for example), and firewall blocked that request and I took each time this error:
ERROR - 2017-12-19 20:44:11 --> Fatal Error - SOAP-ERROR: Parsing
WSDL: Couldn't load from 'http://soalurl.test:9087/orawsv?wsdl' :
failed to load external entity "http://soalurl.test:9087/orawsv?wsdl"
I allowed port in firewall and solved the error!
Try changing
$client = new SoapClient('http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl', ['trace' => true]);
to
$client = new SoapClient('http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl', ['trace' => true, 'cache_wsdl' => WSDL_CACHE_MEMORY]);
Also (whether that works or not), check to make sure that /tmp is writeable by your web server and that it isn't full.
Try enabling openssl extension in your php.ini if it is disabled.
This way I could access the web service without need of any extra arguments, i.e.,
$client = new SoapClient(url);
None of the above works for me, so after a lot of research, I ended up pre-downloading the wsdl file, saving it locally, and passing that file as the first parameter to SoapClient.
Worth mentioning is that file_get_contents($serviceUrl) returned empty response for me, while the url opened fine in my browser. That is probably why SoapClient also could not load the wsdl document. So I ended up downloading it with the php curl library. Here is an example
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $serviceUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$wsdl = curl_exec($ch);
curl_close($ch);
$wsdlFile = '/tmp/service.wsdl';
file_put_contents($wsdlFile, $wsdl);
$client = new SoapClient($wsdlFile);
You can of course implement your own caching policy for the wsdl file, so it won't be downloaded on each request.
503 means the functions are working and you're getting a response from the remote server denying you. If you ever tried to cURL google results the same thing happens, because they can detect the user-agent used by file_get_contents and cURL and as a result block those user agents. It's also possible that the server you're accessing from also has it's IP address blackballed for such practices.
Mainly three common reasons why the commands wouldn't work just like the browser in a remote situation.
1) The default USER-AGENT has been blocked.
2) Your server's IP block has been blocked.
3) Remote host has a proxy detection.
After hours of analysis reading tons of logs and internet, finally found problem.
If you use docker and php 7.4 (my case) you probably get error because default security level in OpenSSL it too high for wsdl cert. Even if you disable verify and allow self-signed in SoapClient options.
You need lower seclevel in /etc/ssl/openssl.cnf from DEFAULT#SECLEVEL=2 to
DEFAULT#SECLEVEL=1
Or just add into Dockerfile
RUN sed -i "s|DEFAULT#SECLEVEL=2|DEFAULT#SECLEVEL=1|g" /etc/ssl/openssl.cnf
Source: https://github.com/dotnet/runtime/issues/30667#issuecomment-566482876
You can verify it by run on container
curl -A 'cURL User Agent' -4 https://ewus.nfz.gov.pl/ws-broker-server-ewus/services/Auth?wsdl
Before that change I got error:
SSL routines:tls_process_ske_dhe:dh key too small
It was solved for me this way:
Every company from which you provide "Host" has a firewall.
This error occurs when your source IP is not defined in that firewall.
Contact the server administrator to add the IP.
Or the target IP must be defined in the server firewall whitelist.
I use the AdWords API, and sometimes I have the same problem.
My solution is to add
ini_set('default_socket_timeout', 900);
on the file
vendor\googleads\googleads-php-lib\src\Google\AdsApi\AdsSoapClient.php line 65
and in the
vendor\googleads-php-lib\src\Google\AdsApi\Adwords\Reporting\v201702\ReportDownloader.php line 126
ini_set('default_socket_timeout', 900);
$requestOptions['stream_context']['http']['timeout'] = "900";
Google package overwrite the default php.ini parameter.
Sometimes, the page could connect to 'https://adwords.google.com/ap
i/adwords/mcm/v201702/ManagedCustomerService?wsdl and sometimes no.
If the page connects once, The WSDL cache will contain the same page, and the program will be ok until the code refreshes the cache...
Adding ?wsdl at the end and calling the method:
$client->__setLocation('url?wsdl');
helped to me.
I might have read all questions about this for two days. None of the answers worked for me.
In my case I was lacking cURL module for PHP.
Be aware that, just because you can use cURL on terminal, it does not mean that you have PHP cURL module and it is active.
There was no error showing about it. Not even on /var/log/apache2/error.log
How to install module:
(replace version number for the apropiated one)
sudo apt install php7.2-curl
sudo service apache2 reload
I had the same problem
From local machines everything work (wamp + php5.5.38 or vagrant + php 7.4), but from prod linux server I had error
SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl' : failed to load external entity "http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl"
From redirect path plugin in chrome I discovered permanent redirect to https, but change url to https doesnt help.
Status Code URL IP Page Type Redirect Type Redirect URL
301 http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl 147.67.210.30 server_redirect permanent https://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl
200 https://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl 147.67.210.30 normal none none
After few attempts of different code solutions helped my our server provider. He discovered problem in IP forwarding with ipv6.
http://ec.europa.eu/
Pinging ec.europa.eu [147.67.34.30] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Recommendation was user stream_context_create with socket and bind to 0:0. this forces ipv4
// https://www.php.net/manual/en/context.socket.php
$streamContextOptions = [
'socket' => [
'bindto' => '0:0'
],
];
$streamContext = stream_context_create($streamContextOptions);
$soapOptions = [
'stream_context' => $streamContext
];
$service = new SoapClient('https://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl', $soapOptions);
I had similar error because I accidently removed attribute
[ServiceContract] from my contract, yet the service host was still opening successfully. Blunders happen
May try to see if the endpoint supports https as well
Below solution worked for me.
1- Go to php.ini in ubuntu with apache is /etc/php/7.4/apache2
( note: you should use your php version replace by 7.4 )
2- Remove ; from this line ;extension=openssl to make in uncommented.
3- Restart your web server sudo service apache2 restart
I've been trying to figure out what's wrong and what is the problem with this following PHP code, which is trying to make a SOAP call. I can't get it to work when I host the PHP on free web hosting sites
include_once("nusoap/lib/nusoap.php");
// create the client and define the URL endpoint
$client = new nusoap_client('http://xxxyyy.zzz:1881/');
// set the character encoding, utf-8 is the standard.
$client->soap_defencoding = 'UTF-8';
$client->call('sendSMS', array( 'uName' => 'kd81fg',
'uPin' => '18416',
'MSISDN' => '09156300965',
'messageString' => 'THIS IS A SAMPLE MESSAGE',
'Display' => '1',
'udh' => '',
'mwi' => '',
'coding' => '0' ),
"http://ESCPlatform/xsd");
When I tried using this hosted on my localhost, it work, but when I try to upload it (I tried so many free web hosting sites) to a web hosting site, and try to run it, it will not work.
I don't know what's wrong but I'm pretty sure that the code is perfect. I'm guessing that the free web hosting sites that I tried do not allow SOAP / XML , or maybe cURL is disabled, or url_fopen is Off on their php.ini (config) or something . I don't really know what's wrong right now and I need to finish what I'm doing right away.
UPDATE: I tried to echo what's the error and here what it says
HTTP Error: Couldn't open socket
connection to server http://xxxyyy.zzz:1881/, Error (111) Connection refused.
I checked the phpinfo for curl and stuff.
I was thinking of that too that maybe the problem is on the free hosts that they dont allow connection on port 1881, but I tried to scan and check if 1881 is open on my localhost, and it says my 1881 is closed, and now I'm confused.
Probadly port 1881 is closed on the free hosts. Try to close it on your pc/router. If the same error appears than this should be the problem.
EDIT: Did you check the phpinfo() for curl and stuff?
EDIT 2: Don't you have to add the client's host to your profile at the service provider's site like when you want to use the Google maps API?
Very often free web hosts will block outgoing ports. If you can set up a reverse proxy with apache or nginx (I'm assuming you're hosting the SOAP server).
Sometimes fail to call the web service.
This problem happens all the time.
What could be the problem?
Error:
SoapFault exception: [HTTP] Could not connect to host in
0 [internal function]: SoapClient->__doRequest('<?xml version="...', http://.', '', 1, 0)
The problem was solved.The problem is the cache
ini_set('soap.wsdl_cache_enabled',0);
ini_set('soap.wsdl_cache_ttl',0);
I am adding my comment for completeness, as the solutions listed here did not help me. On PHP 5.6, SoapClient makes the first call to the specified WSDL URL in SoapClient::SoapClient and after connecting to it and receiving the result, it tries to connect to the WSDL specified in the result in:
<soap:address location="http://"/>
And the call fails with error Could not connect to host if the WSDL is different than the one you specified in SoapClient::SoapClient and is unreachable (my case was SoapUI using http://host.local/).
The behaviour in PHP 5.4 is different and it always uses the WSDL in SoapClient::SoapClient.
The host is either down or very slow to respond. If it's slow to respond, you can try increasing the timeout via the connection_timeout option or via the default_socket_timeout setting and see if that reduces the failures.
http://www.php.net/manual/en/soapclient.soapclient.php
http://www.php.net/manual/en/filesystem.configuration.php#ini.default-socket-timeout
You can also include error handling as zanlok pointed out to retry a few times. If you have users actually waiting on these SOAP calls then you'll want to queue them up and process them in the background and notify the user when they're finished.
A misconfigured service leaves the default namespace with tempuri.org
This means the connection to the wsdl will work, but the function call will fail.
Stacktrace:
SoapClient->__doRequest('http://example.com...', 'http://tempuri.org....', 2, 0)
To remediate this, you must explicitly set the location using __setLocation()
$this->soapClient = new \SoapClient(WS_URL);
$this->soapClient->__setLocation(WS_URL);
This work for me
$opts = array(
'ssl' => array('verify_peer' => false, 'verify_peer_name' => false)
);
if (!isset($this->soap_client)) {
$this->soap_client = new SoapClient($this->WSDL, array(
'soap_version' => $this->soap_version,
'location' => $this->URL,
'trace' => 1,
'exceptions' => 0,
'stream_context' => stream_context_create($opts)
));
there is a soap config section in your php.ini file, which control the wsdl access cache, may be shown as:
[soap]
; Enables or disables WSDL caching feature.
soap.wsdl_cache_enabled=1 ;
Sets the directory name where SOAP extension will put cache files.
soap.wsdl_cache_dir="/tmp"
; (time to live) Sets the number of second while cached file will be used ; instead of original one.
soap.wsdl_cache_ttl=86400
if wsdl file cache is enabled, it may cause this problem when changing wsdl URI in php code.
in this example, you can just delete file start with wsdl- under /tmp directory.
or you just set soap.wsdl_cache_enabled=0; and soap.wsdl_cache_ttl=0;
PHP will fetch the wsdl file every-time you visit the page.
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.
In my case it worked after the connection to the wsdl, use the function __setLocation() to define the location again because the call fails with the error:
Could not connect to the host
This happens if the WSDL is different to the one specified in SoapClient::SoapClient.
I hit this issue myself and after much digging I eventually found this bug for ubuntu:
https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/965371
specifically
https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/965371/comments/62
openssl s_client -connect site.tld:443 failed however openssl s_client -tls1 -connect site.tld:443 gave success. In my particular case part of the output included
New, TLSv1/SSLv3, Cipher is RC4-MD5 so I set the php context ssl/cipher value appropriately.
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.
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' => $context
]);
In my case service address in wsdl is wrong.
My wsdl url is.
https://myweb.com:4460/xxx_webservices/services/ABC.ABC?wsdl
But service address in that xml result is.
<soap:address location="http://myweb.com:8080/xxx_webservices/services/ABC.ABC/"/>
I just save that xml to local file and change service address to.
<soap:address location="https://myweb.com:4460/xxx_webservices/services/ABC.ABC/"/>
Good luck.
I finally found the reason，its becuse of the library can't find a CA bundle on your system.
PHP >= v5.6 automatically sets verify_peer to true by default. However, not all systems have a known CA bundle on disk .
You can try one of these procedures:
1.If you have a CA file on your system, set openssl.cafile or curl.cainfo in your php.ini to the path of your CA file.
2.Manually specify your SSL CA file location
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($cHandler, CURLOPT_CAINFO, $path-of-your-ca-file);
3.disabled verify_peer
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
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.
For me it was a DNS issue. My VPS's nameservers crapped out, so I switched to Google's by editing my /etc/resolv.conf to be:
nameserver 8.8.8.8
nameserver 8.8.4.4
If you have a firewall on your server, make sure to open the port used by SOAP.
In my case, I had to open the port 1664.
iptables -t filter -A INPUT -p tcp --dport 1664 -j ACCEPT
iptables -t filter -A OUTPUT -p tcp --dport 1664 -j ACCEPT
if ujava's solution can't help you,you can try to use try/catch to catch this fatal,this works fine on me.
try{
$res = $client->__call('LineStopQueryJson',array('Parameters' => $params));
}catch(SoapFault $e){
print_r($client);
}
With me, this problem in base Address in app.config of WCF service:
When I've used:
<baseAddresses><add baseAddress="http://127.0.0.1:9022/Service/GatewayService"/> </baseAddresses>
it's ok if use .net to connect with public ip or domain.
But when use PHP's SoapClient to connect to "http://[online ip]:9022/Service/GatewayService", it's throw exception "Coulod not connect to host"
I've changed baseAddress to [online ip]:9022 and everything's ok.
Another possible reason for this error is when you are creating and keeping too many connections open.
SoapClient sends the HTTP Header Connection: Keep-Alive by default (through the constructor option keep_alive). But if you create a new SoapClient instance for every call in your queue, this will create and keep-open a new connection everytime. If the calls are executed fast enough, you will eventually run into a limit of 1000 open connections or so and this results in SoapFault: Could not connect to host.
So make sure you create the SoapClient once and reuse it for subsequent calls.
I had a bad php.ini configuration. Verify the path and the certificate validity...
[openssl]
openssl.cafile = "C:/good/phpath/ca-bundle.crt"
Because my new \SoapClient($wsdl) was https !
Just to help other people who encounter this error, the url in <soap:address location="https://some.url"/> had an invalid certificate and caused the error.
For me, this was a problem in the httpd service (Fedora 24). A simple restart did the trick:
sudo service httpd restart
If the connection is through SSL, could be a problem of server instead of client (it is my case).
In PHP versions greater than 5.6 and 7, is important to check the CipherSuite used in server certificate.
There is a full list of ciphers allowed by this versions and a full list of ciphers that do not in this web link: https://wiki.mozilla.org/Security/Server_Side_TLS#Recommended_Ciphersuite
If the cipher used is not allowed (it is a deprecated algorithm), SoapClient receives "Could not connect to host" and there is no more trace about it.
The cipher used can be checked by clients like SoapUI in the section of "SSL Info", for example.
There is no thread forum treating about this in internet.
Check this out, too: http://php.net/manual/en/migration56.openssl.php
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' => $location,
'keep_alive' => false,
"stream_context" => stream_context_create([
'ssl' => [
'crypto_method' => STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT,
]
]),
'trace' => 1, // used for debug
)
);
In my case, disabled SELINUX allow PHP to call my WebService.
I run PHP in FPM with Apache2
SELinux status :
# sestatus
Disable SELinux :
setenforce 0
Enable SELinux :
# setenforce 1
Permanent disable :
edit this file /etc/selinux/config
Version check helped me OpenSSL. OpenSSL_1_0_1f not supported TSLv.1_2 !
Check version and compatibility with TSLv.1_2 on github openssl/openssl
. And regenerate your certificate with new openssl
openssl pkcs12 -in path.p12 -out newfile.pem
P.S I don’t know what they were minus, but this solution will really help.
That most likely refers to a connection issue. It could be either that your internet connection was down, or the web service you are trying to use was down. I suggest using this service to see if the web service is online or not: http://downforeveryoneorjustme.com/
I am trying to load content from a remote URL in my php code. There are two restrictions:
I need to use the dedicated server IP I have so the REMOTE_ADDR of the other server has to be my dedicated IP. This eliminates Curl because Curl uses a proxy to load the remote URL and the proxy changes the IP address which does not work.
I need to load the data on my back-end using PHP. I do not wish to use Javascript for security reasons.
Are there any other solutions other then Curl?
Thank you
What about file_get_contents($url)? Just note that some websites require a user-agent, so you'll have to set one with ini_set() before making the call.
When using the stream api and a wrapper that utilizes the socket-wrapper you can set the bindto context parameter to accomplish (1) :
Used to specify the IP address (either IPv4 or IPv6) and/or the port number that PHP will use to access the network. The syntax is ip:port. Setting the IP or the port to 0 will let the system choose the IP and/or port.
$ctx = stream_context_create( array(
'socket' => array(
'bindto' => '192.168.0.107:0',
)
));
$c= file_get_contents('http://php.net', 0, $ctx);
You could probably use fopen for this.
Have you tried file_get_contents
<?php
$homepage = file_get_contents('http://www.stackoverflow.com/');
echo $homepage;
?>