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wordpress-azure/wp-includes/class-wp-http-streams.php at master · cmdel/wordpress-azure · GitHub
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<?php
/**
* HTTP API: WP_Http_Streams class
*
* @package WordPress
* @subpackage HTTP
* @since 4.4.0
*/
/**
* Core class used to integrate PHP Streams as an HTTP transport.
*
* @since 2.7.0
* @since 3.7.0 Combined with the fsockopen transport and switched to `stream_socket_client()`.
*/
class
WP_Http_Streams {
/**
* Send a HTTP request to a URI using PHP Streams.
*
* @see WP_Http::request For default options descriptions.
*
* @since 2.7.0
* @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client().
*
* @access public
* @param string $url The request URL.
* @param string|array $args Optional. Override the defaults.
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
*/
public
function
request
(
$
url
,
$
args
=
array
()) {
$
defaults
=
array
(
'
method
'
=>
'
GET
'
,
'
timeout
'
=>
5
,
'
redirection
'
=>
5
,
'
httpversion
'
=>
'
1.0
'
,
'
blocking
'
=>
true
,
'
headers
'
=>
array
(),
'
body
'
=>
null
,
'
cookies
'
=>
array
()
);
$
r
=
wp_parse_args
(
$
args
,
$
defaults
);
if
(
isset
(
$
r
[
'
headers
'
][
'
User-Agent
'
] ) ) {
$
r
[
'
user-agent
'
] =
$
r
[
'
headers
'
][
'
User-Agent
'
];
unset(
$
r
[
'
headers
'
][
'
User-Agent
'
] );
}
elseif
(
isset
(
$
r
[
'
headers
'
][
'
user-agent
'
] ) ) {
$
r
[
'
user-agent
'
] =
$
r
[
'
headers
'
][
'
user-agent
'
];
unset(
$
r
[
'
headers
'
][
'
user-agent
'
] );
}
// Construct Cookie: header if any cookies are set.
WP_Http::
buildCookieHeader
(
$
r
);
$
arrURL
=
parse_url
(
$
url
);
$
connect_host
=
$
arrURL
[
'
host
'
];
$
secure_transport
= (
$
arrURL
[
'
scheme
'
] ==
'
ssl
'
||
$
arrURL
[
'
scheme
'
] ==
'
https
'
);
if
( !
isset
(
$
arrURL
[
'
port
'
] ) ) {
if
(
$
arrURL
[
'
scheme
'
] ==
'
ssl
'
||
$
arrURL
[
'
scheme
'
] ==
'
https
'
) {
$
arrURL
[
'
port
'
] =
443
;
$
secure_transport
=
true
;
}
else
{
$
arrURL
[
'
port
'
] =
80
;
}
}
// Always pass a Path, defaulting to the root in cases such as http://example.com
if
( !
isset
(
$
arrURL
[
'
path
'
] ) ) {
$
arrURL
[
'
path
'
] =
'
/
'
;
}
if
(
isset
(
$
r
[
'
headers
'
][
'
Host
'
] ) ||
isset
(
$
r
[
'
headers
'
][
'
host
'
] ) ) {
if
(
isset
(
$
r
[
'
headers
'
][
'
Host
'
] ) )
$
arrURL
[
'
host
'
] =
$
r
[
'
headers
'
][
'
Host
'
];
else
$
arrURL
[
'
host
'
] =
$
r
[
'
headers
'
][
'
host
'
];
unset(
$
r
[
'
headers
'
][
'
Host
'
],
$
r
[
'
headers
'
][
'
host
'
] );
}
/*
* Certain versions of PHP have issues with 'localhost' and IPv6, It attempts to connect
* to ::1, which fails when the server is not set up for it. For compatibility, always
* connect to the IPv4 address.
*/
if
(
'
localhost
'
==
strtolower
(
$
connect_host
) )
$
connect_host
=
'
127.0.0.1
'
;
$
connect_host
=
$
secure_transport
?
'
ssl://
'
.
$
connect_host
:
'
tcp://
'
.
$
connect_host
;
$
is_local
=
isset
(
$
r
[
'
local
'
] ) &&
$
r
[
'
local
'
];
$
ssl_verify
=
isset
(
$
r
[
'
sslverify
'
] ) &&
$
r
[
'
sslverify
'
];
if
(
$
is_local
) {
/**
* Filters whether SSL should be verified for local requests.
*
* @since 2.8.0
*
* @param bool $ssl_verify Whether to verify the SSL connection. Default true.
*/
$
ssl_verify
=
apply_filters
(
'
https_local_ssl_verify
'
,
$
ssl_verify
);
}
elseif
( !
$
is_local
) {
/**
* Filters whether SSL should be verified for non-local requests.
*
* @since 2.8.0
*
* @param bool $ssl_verify Whether to verify the SSL connection. Default true.
*/
$
ssl_verify
=
apply_filters
(
'
https_ssl_verify
'
,
$
ssl_verify
);
}
$
proxy
=
new
WP_HTTP_Proxy
();
$
context
=
stream_context_create
(
array
(
'
ssl
'
=>
array
(
'
verify_peer
'
=>
$
ssl_verify
,
//'CN_match' => $arrURL['host'], // This is handled by self::verify_ssl_certificate()
'
capture_peer_cert
'
=>
$
ssl_verify
,
'
SNI_enabled
'
=>
true
,
'
cafile
'
=>
$
r
[
'
sslcertificates
'
],
'
allow_self_signed
'
=> !
$
ssl_verify
,
)
) );
$
timeout
= (
int
)
floor
(
$
r
[
'
timeout
'
] );
$
utimeout
=
$
timeout
==
$
r
[
'
timeout
'
] ?
0
:
1000000
*
$
r
[
'
timeout
'
] %
1000000
;
$
connect_timeout
=
max
(
$
timeout
,
1
);
// Store error number.
$
connection_error
=
null
;
// Store error string.
$
connection_error_str
=
null
;
if
( !
WP_DEBUG
) {
// In the event that the SSL connection fails, silence the many PHP Warnings.
if
(
$
secure_transport
)
$
error_reporting
=
error_reporting
(
0
);
if
(
$
proxy
->
is_enabled
() &&
$
proxy
->
send_through_proxy
(
$
url
) )
$
handle
= @
stream_socket_client
(
'
tcp://
'
.
$
proxy
->
host
() .
'
:
'
.
$
proxy
->
port
(),
$
connection_error
,
$
connection_error_str
,
$
connect_timeout
,
STREAM_CLIENT_CONNECT
,
$
context
);
else
$
handle
= @
stream_socket_client
(
$
connect_host
.
'
:
'
.
$
arrURL
[
'
port
'
],
$
connection_error
,
$
connection_error_str
,
$
connect_timeout
,
STREAM_CLIENT_CONNECT
,
$
context
);
if
(
$
secure_transport
)
error_reporting
(
$
error_reporting
);
}
else
{
if
(
$
proxy
->
is_enabled
() &&
$
proxy
->
send_through_proxy
(
$
url
) )
$
handle
=
stream_socket_client
(
'
tcp://
'
.
$
proxy
->
host
() .
'
:
'
.
$
proxy
->
port
(),
$
connection_error
,
$
connection_error_str
,
$
connect_timeout
,
STREAM_CLIENT_CONNECT
,
$
context
);
else
$
handle
=
stream_socket_client
(
$
connect_host
.
'
:
'
.
$
arrURL
[
'
port
'
],
$
connection_error
,
$
connection_error_str
,
$
connect_timeout
,
STREAM_CLIENT_CONNECT
,
$
context
);
}
if
(
false
===
$
handle
) {
// SSL connection failed due to expired/invalid cert, or, OpenSSL configuration is broken.
if
(
$
secure_transport
&&
0
===
$
connection_error
&&
''
===
$
connection_error_str
)
return
new
WP_Error
(
'
http_request_failed
'
,
__
(
'
The SSL certificate for the host could not be verified.
'
) );
return
new
WP_Error
(
'
http_request_failed
'
,
$
connection_error
.
'
:
'
.
$
connection_error_str
);
}
// Verify that the SSL certificate is valid for this request.
if
(
$
secure_transport
&&
$
ssl_verify
&& !
$
proxy
->
is_enabled
() ) {
if
( !
self
::
verify_ssl_certificate
(
$
handle
,
$
arrURL
[
'
host
'
] ) )
return
new
WP_Error
(
'
http_request_failed
'
,
__
(
'
The SSL certificate for the host could not be verified.
'
) );
}
stream_set_timeout
(
$
handle
,
$
timeout
,
$
utimeout
);
if
(
$
proxy
->
is_enabled
() &&
$
proxy
->
send_through_proxy
(
$
url
) )
//Some proxies require full URL in this field.
$
requestPath
=
$
url
;
else
$
requestPath
=
$
arrURL
[
'
path
'
] . (
isset
(
$
arrURL
[
'
query
'
]) ?
'
?
'
.
$
arrURL
[
'
query
'
] :
''
);
$
strHeaders
=
strtoupper
(
$
r
[
'
method
'
]) .
'
'
.
$
requestPath
.
'
HTTP/
'
.
$
r
[
'
httpversion
'
] .
"\r\n"
;
$
include_port_in_host_header
= (
(
$
proxy
->
is_enabled
() &&
$
proxy
->
send_through_proxy
(
$
url
) ) ||
(
'
http
'
==
$
arrURL
[
'
scheme
'
] &&
80
!=
$
arrURL
[
'
port
'
] ) ||
(
'
https
'
==
$
arrURL
[
'
scheme
'
] &&
443
!=
$
arrURL
[
'
port
'
] )
);
if
(
$
include_port_in_host_header
) {
$
strHeaders
.=
'
Host:
'
.
$
arrURL
[
'
host
'
] .
'
:
'
.
$
arrURL
[
'
port
'
] .
"\r\n"
;
}
else
{
$
strHeaders
.=
'
Host:
'
.
$
arrURL
[
'
host
'
] .
"\r\n"
;
}
if
(
isset
(
$
r
[
'
user-agent
'
]) )
$
strHeaders
.=
'
User-agent:
'
.
$
r
[
'
user-agent
'
] .
"\r\n"
;
if
(
is_array
(
$
r
[
'
headers
'
]) ) {
foreach
( (
array
)
$
r
[
'
headers
'
]
as
$
header
=>
$
headerValue
)
$
strHeaders
.=
$
header
.
'
:
'
.
$
headerValue
.
"\r\n"
;
}
else
{
$
strHeaders
.=
$
r
[
'
headers
'
];
}
if
(
$
proxy
->
use_authentication
() )
$
strHeaders
.=
$
proxy
->
authentication_header
() .
"\r\n"
;
$
strHeaders
.=
"\r\n"
;
if
( !
is_null
(
$
r
[
'
body
'
]) )
$
strHeaders
.=
$
r
[
'
body
'
];
fwrite
(
$
handle
,
$
strHeaders
);
if
( !
$
r
[
'
blocking
'
] ) {
stream_set_blocking
(
$
handle
,
0
);
fclose
(
$
handle
);
return
array
(
'
headers
'
=>
array
(),
'
body
'
=>
''
,
'
response
'
=>
array
(
'
code
'
=>
false
,
'
message
'
=>
false
),
'
cookies
'
=>
array
() );
}
$
strResponse
=
''
;
$
bodyStarted
=
false
;
$
keep_reading
=
true
;
$
block_size
=
4096
;
if
(
isset
(
$
r
[
'
limit_response_size
'
] ) )
$
block_size
=
min
(
$
block_size
,
$
r
[
'
limit_response_size
'
] );
// If streaming to a file setup the file handle.
if
(
$
r
[
'
stream
'
] ) {
if
( !
WP_DEBUG
)
$
stream_handle
= @
fopen
(
$
r
[
'
filename
'
],
'
w+
'
);
else
$
stream_handle
=
fopen
(
$
r
[
'
filename
'
],
'
w+
'
);
if
( !
$
stream_handle
)
return
new
WP_Error
(
'
http_request_failed
'
,
sprintf
(
__
(
'
Could not open handle for fopen() to %s
'
),
$
r
[
'
filename
'
] ) );
$
bytes_written
=
0
;
while
( !
feof
(
$
handle
) &&
$
keep_reading
) {
$
block
=
fread
(
$
handle
,
$
block_size
);
if
( !
$
bodyStarted
) {
$
strResponse
.=
$
block
;
if
(
strpos
(
$
strResponse
,
"\r\n\r\n"
) ) {
$
process
= WP_Http::
processResponse
(
$
strResponse
);
$
bodyStarted
=
true
;
$
block
=
$
process
[
'
body
'
];
unset(
$
strResponse
);
$
process
[
'
body
'
] =
''
;
}
}
$
this_block_size
=
strlen
(
$
block
);
if
(
isset
(
$
r
[
'
limit_response_size
'
] ) && (
$
bytes_written
+
$
this_block_size
) >
$
r
[
'
limit_response_size
'
] ) {
$
this_block_size
= (
$
r
[
'
limit_response_size
'
] -
$
bytes_written
);
$
block
=
substr
(
$
block
,
0
,
$
this_block_size
);
}
$
bytes_written_to_file
=
fwrite
(
$
stream_handle
,
$
block
);
if
(
$
bytes_written_to_file
!=
$
this_block_size
) {
fclose
(
$
handle
);
fclose
(
$
stream_handle
);
return
new
WP_Error
(
'
http_request_failed
'
,
__
(
'
Failed to write request to temporary file.
'
) );
}
$
bytes_written
+=
$
bytes_written_to_file
;
$
keep_reading
= !
isset
(
$
r
[
'
limit_response_size
'
] ) ||
$
bytes_written
<
$
r
[
'
limit_response_size
'
];
}
fclose
(
$
stream_handle
);
}
else
{
$
header_length
=
0
;
while
( !
feof
(
$
handle
) &&
$
keep_reading
) {
$
block
=
fread
(
$
handle
,
$
block_size
);
$
strResponse
.=
$
block
;
if
( !
$
bodyStarted
&&
strpos
(
$
strResponse
,
"\r\n\r\n"
) ) {
$
header_length
=
strpos
(
$
strResponse
,
"\r\n\r\n"
) +
4
;
$
bodyStarted
=
true
;
}
$
keep_reading
= ( !
$
bodyStarted
|| !
isset
(
$
r
[
'
limit_response_size
'
] ) ||
strlen
(
$
strResponse
) < (
$
header_length
+
$
r
[
'
limit_response_size
'
] ) );
}
$
process
= WP_Http::
processResponse
(
$
strResponse
);
unset(
$
strResponse
);
}
fclose
(
$
handle
);
$
arrHeaders
= WP_Http::
processHeaders
(
$
process
[
'
headers
'
],
$
url
);
$
response
=
array
(
'
headers
'
=>
$
arrHeaders
[
'
headers
'
],
// Not yet processed.
'
body
'
=>
null
,
'
response
'
=>
$
arrHeaders
[
'
response
'
],
'
cookies
'
=>
$
arrHeaders
[
'
cookies
'
],
'
filename
'
=>
$
r
[
'
filename
'
]
);
// Handle redirects.
if
(
false
!== (
$
redirect_response
= WP_Http::
handle_redirects
(
$
url
,
$
r
,
$
response
) ) )
return
$
redirect_response
;
// If the body was chunk encoded, then decode it.
if
( !
empty
(
$
process
[
'
body
'
] ) &&
isset
(
$
arrHeaders
[
'
headers
'
][
'
transfer-encoding
'
] ) &&
'
chunked
'
==
$
arrHeaders
[
'
headers
'
][
'
transfer-encoding
'
] )
$
process
[
'
body
'
] = WP_Http::
chunkTransferDecode
(
$
process
[
'
body
'
]);
if
(
true
===
$
r
[
'
decompress
'
] &&
true
=== WP_Http_Encoding::
should_decode
(
$
arrHeaders
[
'
headers
'
]) )
$
process
[
'
body
'
] = WP_Http_Encoding::
decompress
(
$
process
[
'
body
'
] );
if
(
isset
(
$
r
[
'
limit_response_size
'
] ) &&
strlen
(
$
process
[
'
body
'
] ) >
$
r
[
'
limit_response_size
'
] )
$
process
[
'
body
'
] =
substr
(
$
process
[
'
body
'
],
0
,
$
r
[
'
limit_response_size
'
] );
$
response
[
'
body
'
] =
$
process
[
'
body
'
];
return
$
response
;
}
/**
* Verifies the received SSL certificate against its Common Names and subjectAltName fields.
*
* PHP's SSL verifications only verify that it's a valid Certificate, it doesn't verify if
* the certificate is valid for the hostname which was requested.
* This function verifies the requested hostname against certificate's subjectAltName field,
* if that is empty, or contains no DNS entries, a fallback to the Common Name field is used.
*
* IP Address support is included if the request is being made to an IP address.
*
* @since 3.7.0
* @static
*
* @param stream $stream The PHP Stream which the SSL request is being made over
* @param string $host The hostname being requested
* @return bool If the cerficiate presented in $stream is valid for $host
*/
public
static
function
verify_ssl_certificate
(
$
stream
,
$
host
) {
$
context_options
=
stream_context_get_options
(
$
stream
);
if
(
empty
(
$
context_options
[
'
ssl
'
][
'
peer_certificate
'
] ) )
return
false
;
$
cert
=
openssl_x509_parse
(
$
context_options
[
'
ssl
'
][
'
peer_certificate
'
] );
if
( !
$
cert
)
return
false
;
/*
* If the request is being made to an IP address, we'll validate against IP fields
* in the cert (if they exist)
*/
$
host_type
= ( WP_Http::
is_ip_address
(
$
host
) ?
'
ip
'
:
'
dns
'
);
$
certificate_hostnames
=
array
();
if
( !
empty
(
$
cert
[
'
extensions
'
][
'
subjectAltName
'
] ) ) {
$
match_against
=
preg_split
(
'
/,\s*/
'
,
$
cert
[
'
extensions
'
][
'
subjectAltName
'
] );
foreach
(
$
match_against
as
$
match
) {
list
(
$
match_type
,
$
match_host
) =
explode
(
'
:
'
,
$
match
);
if
(
$
host_type
==
strtolower
(
trim
(
$
match_type
) ) )
// IP: or DNS:
$
certificate_hostnames
[] =
strtolower
(
trim
(
$
match_host
) );
}
}
elseif
( !
empty
(
$
cert
[
'
subject
'
][
'
CN
'
] ) ) {
// Only use the CN when the certificate includes no subjectAltName extension.
$
certificate_hostnames
[] =
strtolower
(
$
cert
[
'
subject
'
][
'
CN
'
] );
}
// Exact hostname/IP matches.
if
(
in_array
(
strtolower
(
$
host
),
$
certificate_hostnames
) )
return
true
;
// IP's can't be wildcards, Stop processing.
if
(
'
ip
'
==
$
host_type
)
return
false
;
// Test to see if the domain is at least 2 deep for wildcard support.
if
(
substr_count
(
$
host
,
'
.
'
) <
2
)
return
false
;
// Wildcard subdomains certs (*.example.com) are valid for a.example.com but not a.b.example.com.
$
wildcard_host
=
preg_replace
(
'
/^[^.]+\./
'
,
'
*.
'
,
$
host
);
return
in_array
(
strtolower
(
$
wildcard_host
),
$
certificate_hostnames
);
}
/**
* Determines whether this class can be used for retrieving a URL.
*
* @static
* @access public
* @since 2.7.0
* @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client().
*
* @param array $args Optional. Array of request arguments. Default empty array.
* @return bool False means this class can not be used, true means it can.
*/
public
static
function
test
(
$
args
=
array
() ) {
if
( !
function_exists
(
'
stream_socket_client
'
) )
return
false
;
$
is_ssl
=
isset
(
$
args
[
'
ssl
'
] ) &&
$
args
[
'
ssl
'
];
if
(
$
is_ssl
) {
if
( !
extension_loaded
(
'
openssl
'
) )
return
false
;
if
( !
function_exists
(
'
openssl_x509_parse
'
) )
return
false
;
}
/**
* Filters whether streams can be used as a transport for retrieving a URL.
*
* @since 2.7.0
*
* @param bool $use_class Whether the class can be used. Default true.
* @param array $args Request arguments.
*/
return
apply_filters
(
'
use_streams_transport
'
,
true
,
$
args
);
}
}
/**
* Deprecated HTTP Transport method which used fsockopen.
*
* This class is not used, and is included for backward compatibility only.
* All code should make use of WP_Http directly through its API.
*
* @see WP_HTTP::request
*
* @since 2.7.0
* @deprecated 3.7.0 Please use WP_HTTP::request() directly
*/
class
WP_HTTP_Fsockopen
extends
WP_HTTP_Streams {
// For backward compatibility for users who are using the class directly.
}
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