Send a HTTP request to a URI using PHP Streams.
Description
See also
- WP_Http::request(): For default options descriptions.
Parameters
$url
stringrequired- The request URL.
$args
string|arrayoptional- Override the defaults.
Default:
array()
Source
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(),
'decompress' => false,
'stream' => false,
'filename' => null,
);
$parsed_args = wp_parse_args( $args, $defaults );
if ( isset( $parsed_args['headers']['User-Agent'] ) ) {
$parsed_args['user-agent'] = $parsed_args['headers']['User-Agent'];
unset( $parsed_args['headers']['User-Agent'] );
} elseif ( isset( $parsed_args['headers']['user-agent'] ) ) {
$parsed_args['user-agent'] = $parsed_args['headers']['user-agent'];
unset( $parsed_args['headers']['user-agent'] );
}
// Construct Cookie: header if any cookies are set.
WP_Http::buildCookieHeader( $parsed_args );
$parsed_url = parse_url( $url );
$connect_host = $parsed_url['host'];
$secure_transport = ( 'ssl' === $parsed_url['scheme'] || 'https' === $parsed_url['scheme'] );
if ( ! isset( $parsed_url['port'] ) ) {
if ( 'ssl' === $parsed_url['scheme'] || 'https' === $parsed_url['scheme'] ) {
$parsed_url['port'] = 443;
$secure_transport = true;
} else {
$parsed_url['port'] = 80;
}
}
// Always pass a path, defaulting to the root in cases such as http://example.com.
if ( ! isset( $parsed_url['path'] ) ) {
$parsed_url['path'] = '/';
}
if ( isset( $parsed_args['headers']['Host'] ) || isset( $parsed_args['headers']['host'] ) ) {
if ( isset( $parsed_args['headers']['Host'] ) ) {
$parsed_url['host'] = $parsed_args['headers']['Host'];
} else {
$parsed_url['host'] = $parsed_args['headers']['host'];
}
unset( $parsed_args['headers']['Host'], $parsed_args['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( $parsed_args['local'] ) && $parsed_args['local'];
$ssl_verify = isset( $parsed_args['sslverify'] ) && $parsed_args['sslverify'];
if ( $is_local ) {
/**
* Filters whether SSL should be verified for local HTTP API requests.
*
* @since 2.8.0
* @since 5.1.0 The `$url` parameter was added.
*
* @param bool|string $ssl_verify Boolean to control whether to verify the SSL connection
* or path to an SSL certificate.
* @param string $url The request URL.
*/
$ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify, $url );
} elseif ( ! $is_local ) {
/** This filter is documented in wp-includes/class-wp-http.php */
$ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify, $url );
}
$proxy = new WP_HTTP_Proxy();
$context = stream_context_create(
array(
'ssl' => array(
'verify_peer' => $ssl_verify,
// 'CN_match' => $parsed_url['host'], // This is handled by self::verify_ssl_certificate().
'capture_peer_cert' => $ssl_verify,
'SNI_enabled' => true,
'cafile' => $parsed_args['sslcertificates'],
'allow_self_signed' => ! $ssl_verify,
),
)
);
$timeout = (int) floor( $parsed_args['timeout'] );
$utimeout = 0;
if ( $timeout !== (int) $parsed_args['timeout'] ) {
$utimeout = 1000000 * $parsed_args['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 ) ) {
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
$handle = @stream_socket_client(
'tcp://' . $proxy->host() . ':' . $proxy->port(),
$connection_error,
$connection_error_str,
$connect_timeout,
STREAM_CLIENT_CONNECT,
$context
);
} else {
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
$handle = @stream_socket_client(
$connect_host . ':' . $parsed_url['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 . ':' . $parsed_url['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, $parsed_url['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.
$request_path = $url;
} else {
$request_path = $parsed_url['path'] . ( isset( $parsed_url['query'] ) ? '?' . $parsed_url['query'] : '' );
}
$headers = strtoupper( $parsed_args['method'] ) . ' ' . $request_path . ' HTTP/' . $parsed_args['httpversion'] . "\r\n";
$include_port_in_host_header = (
( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
|| ( 'http' === $parsed_url['scheme'] && 80 !== $parsed_url['port'] )
|| ( 'https' === $parsed_url['scheme'] && 443 !== $parsed_url['port'] )
);
if ( $include_port_in_host_header ) {
$headers .= 'Host: ' . $parsed_url['host'] . ':' . $parsed_url['port'] . "\r\n";
} else {
$headers .= 'Host: ' . $parsed_url['host'] . "\r\n";
}
if ( isset( $parsed_args['user-agent'] ) ) {
$headers .= 'User-agent: ' . $parsed_args['user-agent'] . "\r\n";
}
if ( is_array( $parsed_args['headers'] ) ) {
foreach ( (array) $parsed_args['headers'] as $header => $header_value ) {
$headers .= $header . ': ' . $header_value . "\r\n";
}
} else {
$headers .= $parsed_args['headers'];
}
if ( $proxy->use_authentication() ) {
$headers .= $proxy->authentication_header() . "\r\n";
}
$headers .= "\r\n";
if ( ! is_null( $parsed_args['body'] ) ) {
$headers .= $parsed_args['body'];
}
fwrite( $handle, $headers );
if ( ! $parsed_args['blocking'] ) {
stream_set_blocking( $handle, 0 );
fclose( $handle );
return array(
'headers' => array(),
'body' => '',
'response' => array(
'code' => false,
'message' => false,
),
'cookies' => array(),
);
}
$response = '';
$body_started = false;
$keep_reading = true;
$block_size = 4096;
if ( isset( $parsed_args['limit_response_size'] ) ) {
$block_size = min( $block_size, $parsed_args['limit_response_size'] );
}
// If streaming to a file setup the file handle.
if ( $parsed_args['stream'] ) {
if ( ! WP_DEBUG ) {
$stream_handle = @fopen( $parsed_args['filename'], 'w+' );
} else {
$stream_handle = fopen( $parsed_args['filename'], 'w+' );
}
if ( ! $stream_handle ) {
return new WP_Error(
'http_request_failed',
sprintf(
/* translators: 1: fopen(), 2: File name. */
__( 'Could not open handle for %1$s to %2$s.' ),
'fopen()',
$parsed_args['filename']
)
);
}
$bytes_written = 0;
while ( ! feof( $handle ) && $keep_reading ) {
$block = fread( $handle, $block_size );
if ( ! $body_started ) {
$response .= $block;
if ( strpos( $response, "\r\n\r\n" ) ) {
$processed_response = WP_Http::processResponse( $response );
$body_started = true;
$block = $processed_response['body'];
unset( $response );
$processed_response['body'] = '';
}
}
$this_block_size = strlen( $block );
if ( isset( $parsed_args['limit_response_size'] )
&& ( $bytes_written + $this_block_size ) > $parsed_args['limit_response_size']
) {
$this_block_size = ( $parsed_args['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( $parsed_args['limit_response_size'] )
|| $bytes_written < $parsed_args['limit_response_size']
);
}
fclose( $stream_handle );
} else {
$header_length = 0;
while ( ! feof( $handle ) && $keep_reading ) {
$block = fread( $handle, $block_size );
$response .= $block;
if ( ! $body_started && strpos( $response, "\r\n\r\n" ) ) {
$header_length = strpos( $response, "\r\n\r\n" ) + 4;
$body_started = true;
}
$keep_reading = (
! $body_started
|| ! isset( $parsed_args['limit_response_size'] )
|| strlen( $response ) < ( $header_length + $parsed_args['limit_response_size'] )
);
}
$processed_response = WP_Http::processResponse( $response );
unset( $response );
}
fclose( $handle );
$processed_headers = WP_Http::processHeaders( $processed_response['headers'], $url );
$response = array(
'headers' => $processed_headers['headers'],
// Not yet processed.
'body' => null,
'response' => $processed_headers['response'],
'cookies' => $processed_headers['cookies'],
'filename' => $parsed_args['filename'],
);
// Handle redirects.
$redirect_response = WP_Http::handle_redirects( $url, $parsed_args, $response );
if ( false !== $redirect_response ) {
return $redirect_response;
}
// If the body was chunk encoded, then decode it.
if ( ! empty( $processed_response['body'] )
&& isset( $processed_headers['headers']['transfer-encoding'] )
&& 'chunked' === $processed_headers['headers']['transfer-encoding']
) {
$processed_response['body'] = WP_Http::chunkTransferDecode( $processed_response['body'] );
}
if ( true === $parsed_args['decompress']
&& true === WP_Http_Encoding::should_decode( $processed_headers['headers'] )
) {
$processed_response['body'] = WP_Http_Encoding::decompress( $processed_response['body'] );
}
if ( isset( $parsed_args['limit_response_size'] )
&& strlen( $processed_response['body'] ) > $parsed_args['limit_response_size']
) {
$processed_response['body'] = substr( $processed_response['body'], 0, $parsed_args['limit_response_size'] );
}
$response['body'] = $processed_response['body'];
return $response;
}
Hooks
- apply_filters( ‘https_local_ssl_verify’,
bool|string $ssl_verify ,string $url ) Filters whether SSL should be verified for local HTTP API requests.
- apply_filters( ‘https_ssl_verify’,
bool|string $ssl_verify ,string $url ) Filters whether SSL should be verified for non-local requests.
User Contributed Notes
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