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RPCServer.class.php4
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<?php
# JSON/XML-RPC Server in PHP4 <http://code.google.com/p/json-xml-rpc/>
# Version: 0.8.1.1 (2008-01-06)
# Copyright: 2007, Weston Ruter <http://weston.ruter.net/>
# License: Dual licensed under MIT <http://creativecommons.org/licenses/MIT/>
# and GPL <http://creativecommons.org/licenses/GPL/2.0/> licenses.
#
# The comments contained in this code are largely quotations from the following specs:
# * XML-RPC: <http://www.xmlrpc.com/spec>
# * JSON-RPC 1.0: <http://json-rpc.org/wiki/specification>
# * JSON-RPC 1.1 (working draft): <http://json-rpc.org/wd/JSON-RPC-1-1-WD-20060807.html>
# Note that development on JSON-RPC continues at <http://groups.google.com/group/json-rpc>
#
# Usage:
# if(!class_exists('DateTime'))
# require_once('DateTime.class.php');
# require_once('RPCServer.class.php4');
# putenv('TZ=UTC');
# $server = RPCServer::getInstance(); //note that the RPCServer class is a singleton
# function getTemp($zipCode){
# //...
# return $row['temperature'];
# }
# $server->addMethod("getTemp");
# $server->processRequest();
class RPCServer {
var $JSON_RPC_VERSION = "1.1";
var $XML_RPC_VERSION = "1.0";
var $XML = 1;
var $JSON = 2;
var $JAVASCRIPT = 3;
//var $HTTP_GET = 4;
var $name;
var $id;
var $version;
var $summary;
var $help;
var $address;
var $requestID;
var $requestType; #XML | JSON | HTTP_GET
var $responseType; #XML | JSON | JAVASCRIPT
var $isJSONOmitResponseWrapper;
var $isMethodNotFound;
var $callbackFunction;
var $publicMethodName;
var $isDebugMode = false;
var $isCallingMethod = false;
var $isFinished = false;
var $requestData;
var $responseData;
var $publicToPrivateMap = array();
var $defaultResponseType;
var $JSONDateFormat = 'ISO8601'; #or "classHinting" "@ticks@" or "ASP.NET"
var $dbResultIndexType = 'ASSOC'; #or "NUM"
var $isUsingIncludedFunctions = false; #if not Reflection API
var $defaultParametersPreserved = true;
var $iso8601StringsConverted = true;
#function getInstance()
#function __construct()
#function __clone()
#function preserveDefaultParameters($defaultParametersPreserved)
#function convertISO8601Strings($iso8601StringsConverted)
#function useIncludedFunctions($isUsingIncludedFunctions) #if not Reflection API
#function setDefaultResponseType($type)
#function setJSONDateFormat($formatName)
#function setDBResultIndexType($indexType)
#function setDebugMode($state)
#function addMethod($privateProcName, $publicMethodName)
#function printResponseStart()
#function printResponseEnd()
#function handleError($errno, $errstr, $errfile, $errline, $errcontext)
#function handleException($e)
#function respondWithFault($errno, $errstr, $errfile = null, $errline = null, $errcontext = null)
#function processRequest()
#function encodeJson($value)
#function decodeJson($json)
#function decodeJson_processTokens(&$tokens, &$i)
#function encodeXmlRpc($value)
#function decodeXmlRpc($valueEl)
#function convertResource($resource)
#function getEscapeSequence_callback($regExMatches)
#function getEscapedChar_callback($regExMatches)
#function isVector(&$array)
#function stringToNumber($str)
#function stringToType($str)
#function ticksToDateTime($ticks)
#function unicodeToUtf8($src)
/*BEGIN PHP5**
private static $instance = null;
function getInstance(){
if(!RPCServer::$instance){
$c = __CLASS__;
RPCServer::$instance =& new $c;
}
return RPCServer::$instance;
}
function __construct(){
$this->init();
}
function __clone(){}
function __destruct(){
$this->processRequest();
}
**END PHP5*/
/*BEGIN PHP4*/
function RPCServer(){
$this->init();
}
function getInstance(){
static $instance = null;
if($instance == null){
#$c = __CLASS__;
#return new $c;
$instance =& new RPCServer();
}
return $instance;
}
#In PHP5, the processRequests method is called automatically by the destructor. PHP4 does
# not support destructors, so I tried using register_shutdown_function instead for PHP4's sake.
# However, when there is a fatal error in the user code, the error is not then caught when
# using... register_shutdown_function(array(&$this, 'processRequest'));
/*END PHP4*/
function init(){
ob_start();
$this->isMethodNotFound = false; #if true, then catch block will return HTTP status 404; otherwise 500 (JSON-RPC only)
$this->defaultResponseType = $this->JSON;
$this->requestType = null;
$this->responseType = null;
#"Don't assume a timezone. It should be specified by the server in its documentation what
# assumptions it makes about timezones."
/*BEGIN PHP5**
//date_default_timezone_set("UTC"); //This implementation was assuming universal time.
**END PHP5*/
/*BEGIN PHP4*/
//putenv('TZ=UTC'); #IS THIS VALID? //This implementation was assuming universal time.
/*END PHP4*/
#Set error handler
set_error_handler(array(&$this, "handleError"));
/*BEGIN PHP5**
set_exception_handler(array(&$this, "handleException"));
**END PHP5*/
#############################################################################################
# Get request data
#############################################################################################
$this->requestData = '';
if($_SERVER['REQUEST_METHOD'] == 'POST')
$this->requestData = trim(file_get_contents("php://input"));
#Sniff the request types. While the XML-RPC spec says that the Content-Type [must be] text/xml,
# and while JSON-RPC says the Content-Type MUST be specified and SHOULD read application/json, this
# implementation prefers to determine the content type of the request.
#This implementation does not address JSON-RPC section 6.1. HTTP Header Requirements
if(preg_match("/^\s*<\?xml\b/", $this->requestData)) #preg_match("/\bxml\b/", $headers['Content-Type']) ||
$this->requestType = $this->XML;
else if(preg_match("/^\s*{/", $this->requestData))
$this->requestType = $this->JSON;
#else if(isset($_SERVER['PATH_INFO']))
# $this->requestType = $this->HTTP_GET;
#Determine the appropriate response type. This implementation may respond with an XML-RPC methodResponse
# document, a JSON-RPC response object, bare JSON date (if query string parameter 'JSON-omit-response-wrapper'
# is passed), or JavaScript code with user-specified callback function
# with the JSON response as its parameter. This last response type allow JSON-RPC calls to be made
# to the server by inserting SCRIPT elements into the client document.
if(isset($_GET['JSON-response-callback'])){
$this->responseType = $this->JAVASCRIPT;
if(!preg_match('/^(?:\w|\$|_)(?:\d|\w|\$|_)*(\.(?:\w|\$|_)(?:\d|\w|\$|_)*)*$/', $_GET['JSON-response-callback']))
trigger_error("The provided JavaScript callback function \"" . $_GET['JSON-response-callback'] . "\" is not a valid JavaScript identifier.");
$this->callbackFunction = $_GET['JSON-response-callback'];
#Remove the 'JSON-response-callback' parameter from the query string; it is done this way instead
# of via unset($_GET['JSON-response-callback']) because it is necessary to manually parse the
# query string parameters manually below.
$_SERVER['QUERY_STRING'] = preg_replace('/(^|&)JSON-response-callback=[^&]+/', '', $_SERVER['QUERY_STRING']);
$_SERVER['QUERY_STRING'] = preg_replace('/^&/', '', $_SERVER['QUERY_STRING']);
}
#Determine if the user wants to receive JSON result only (omitting skipping the JSON-RPC response object)
#$this->isJSONOmitResponseWrapper = false;
if($this->isJSONOmitResponseWrapper = isset($_GET['JSON-omit-response-wrapper'])){ # && (bool)$_GET['JSON-omit-response-wrapper']
#$this->isJSONOmitResponseWrapper = true;
#Remove the 'JSON-omit-response-wrapper' parameter from the query string; it is done this way instead
# of via unset($_GET['JSON-omit-response-wrapper']) because it is necessary to manually parse the
# query string parameters manually below.
$_SERVER['QUERY_STRING'] = preg_replace('/(^|&)JSON-omit-response-wrapper=[^&]+/', '', $_SERVER['QUERY_STRING']);
$_SERVER['QUERY_STRING'] = preg_replace('/^&/', '', $_SERVER['QUERY_STRING']);
}
}
function preserveDefaultParameters($defaultParametersPreserved){
$this->defaultParametersPreserved = (bool) $defaultParametersPreserved;
}
function convertISO8601Strings($iso8601StringsConverted){
$this->iso8601StringsConverted = (bool) $iso8601StringsConverted;
}
#disregarded if Reflection API available
function useIncludedFunctions($isUsingIncludedFunctions){
$this->isUsingIncludedFunctions = (bool) $isUsingIncludedFunctions;
}
function setDefaultResponseType($responseType){
switch($responseType){
case $this->JSON:
case $this->XML:
#case $this->JAVASCRIPT:
$this->defaultResponseType = $responseType;
break;
default:
trigger_error('Invalid response type "' . $responseType . '"; it must be one of the constants defined for the RPCServer class: XML or JSON.');
}
}
function setJSONDateFormat($formatName){
switch($formatName){
case 'ISO8601':
case 'classHinting':
case '@ticks@':
case 'ASP.NET':
$this->JSONDateFormat = $formatName;
break;
case '@timestamp@':
$this->JSONDateFormat = '@ticks@';
break;
default:
trigger_error('Invalid format name "' . $formatName . '" provided for specifying the JSON date format. Format must be either "ISO8601", "classHinting", "@ticks@", or "ASP.NET".');
}
setcookie('JSONDateFormat', $formatName, time()+60*60*24*30, dirname($_SERVER['SCRIPT_NAME']));
$_COOKIE['JSONDateFormat'] = $formatName;
return true;
}
function setDBResultIndexType($indexType){
switch($indexType){
case 'ASSOC':
case 'NUM':
$this->dbResultIndexType = $indexType;
break;
default:
trigger_error('Invalid index type "' . $indexType . '" provided for specifying database result indices; it must be either "ASSOC" or "NUM".');
}
setcookie('dbResultIndexType', $indexType, time()+60*60*24*30, dirname($_SERVER['SCRIPT_NAME']));
$_COOKIE['dbResultIndexType'] = $indexType;
return true;
}
function setDebugMode($state){
$this->isDebugMode = (bool) $state;
}
#If a public method name is not provided, then the PHP function name will be used as the public name
function addMethod($privateProcName, $publicMethodName = null){
if($this->isFinished)
die("The server's request has already been processed. You may only invoke 'addMethod' before the 'processRequest' is executed.");
if(!$publicMethodName)
$publicMethodName = $privateProcName;
if(!function_exists($privateProcName))
trigger_error("\$RPCServerInstance->addMethod() failed because the function \"$privateProcName\" does not exist.");
if(isset($this->publicToPrivateMap[$publicMethodName]))
trigger_error("\$RPCServerInstance->addMethod() failed because the method name \"$publicMethodName\" has already been assigned to the function \"" . $this->publicToPrivateMap[$publicMethodName] . "\".");
$this->publicToPrivateMap[$publicMethodName] = $privateProcName;
}
function printResponseStart(){
if(!$this->responseType){
if($this->isJSONOmitResponseWrapper || preg_match("/\bapplication\/json\b/i", $_SERVER['HTTP_ACCEPT']))
$this->responseType = $this->JSON;
else if(!$this->isJSONOmitResponseWrapper && preg_match("/\bxml\b/i", $_SERVER['HTTP_ACCEPT']))
$this->responseType = $this->XML;
else if($this->defaultResponseType)
$this->responseType = $this->defaultResponseType;
else #$this->requestType == $this->XML || $this->requestType == $this->JSON
$this->responseType = $this->requestType;
}
##Start the output to the client in the appropriate format
if($this->responseType == $this->XML){
#The Content-Type is text/xml. Content-Length must be present and correct.
# The body of the response is a single XML structure, a <methodResponse>, which
# can contain a single <params> which contains a single <param> which contains a single <value>.
header('content-type: text/xml; charset=utf-8');
print '<?xml version="1.0"?><methodResponse>';
}
else { #JSON or JavaScript
if($this->responseType == $this->JAVASCRIPT) {
header('content-type: text/javascript; charset=utf-8');
print $this->callbackFunction . "(";
}
else { #$this->responseType == $this->JSON
header('content-type: application/json; charset=utf-8');
}
#Begin response object
if(!$this->isJSONOmitResponseWrapper){
print "{";
#version REQUIRED. A String specifying the version of the JSON-RPC protocol to which the
# client conforms. An implementation conforming to this specification MUST use the exact
# String value of "1.1" for this member. The absence of this member can effectively be
# taken to mean that the remote server implement version 1.0 of the JSON-RPC protocol.
print '"version":"' . $this->JSON_RPC_VERSION . '",';
if($this->requestID)
print '"id":' . $this->encodeJson($this->requestID) . ',';
}
}
}
function printResponseEnd(){
if($this->responseType == $this->XML)
print "</methodResponse>";
else if(!$this->isJSONOmitResponseWrapper)
print "}";
if($this->responseType == $this->JAVASCRIPT)
print ");";
}
function handleError($errno, $errstr, $errfile, $errline, $errcontext){
$this->respondWithFault($errno, $errstr, $errfile, $errline, $errcontext);
return true;
}
/*BEGIN PHP5**
function handleException($e){
$this->respondWithFault($e->getCode(), $e->getMessage(), $e->getFile(), $e->getLine(), $e->getTrace());
return true;
}
**END PHP5*/
function respondWithFault($errno, $errstr, $errfile = null, $errline = null, $errdetails = null){
ob_clean();
$this->printResponseStart();
if($this->isCallingMethod)
$errstr = "Error raised when calling method \"" . $this->publicMethodName . "\": " . $errstr;
$faultDetails = array();
if($this->isDebugMode){
$faultDetails['file'] = $errfile;
$faultDetails['line'] = $errline;
if(is_array($errdetails) && isset($errdetails[0]))
$faultDetails['trace'] = $errdetails;
else
$faultDetails['context'] = $errdetails;
}
if($this->responseType == $this->XML){
#XML-RPC: Unless there's a lower-level error, always return 200 OK.
#The <methodResponse> could also contain a <fault> which contains a <value> which
# is a <struct> containing two elements, one named <faultCode>, an <int> and one
# named <faultString>, a <string>.
print '<fault><value><struct>';
print '<member>';
print '<name>faultCode</name>';
print '<value><int>' . htmlspecialchars($errno, ENT_NOQUOTES) . '</int></value>';
print '</member>';
print '<member>';
print '<name>faultString</name>';
print '<value>' . htmlspecialchars($errstr, ENT_NOQUOTES) . '</value>';
print '</member>';
if($this->isDebugMode){
print '<member>';
print '<name>faultDetails</name>';
print $this->encodeXmlRpc($faultDetails);
#print '<value>' . htmlspecialchars($errorMessageForXML, ENT_NOQUOTES) . '</value>';
print '</member>';
}
print '</struct></value></fault>';
}
else { #JSON
# Unless noted otherwise, a status code of 500 (Internal Server Error) MUST be
# used under the following conditions:
# * There was an error parsing the JSON text comprising the Procedure Call.
# * The target procedure does not exist on the server. For HTTP GET, a server
# SHOULD use 404 (Not Found) instead of 500.
# * The procedure could not be invoked due to an error resulting from call approximation.
# * The invocation took place but resulted in an error from inside the procedure.
if($this->responseType == $this->JAVASCRIPT) #Status code cannot be examined anyway
header("HTTP/1.1 200 OK");
else if($this->isMethodNotFound)
header("HTTP/1.1 404 Not Found");
else
header("HTTP/1.1 500 Internal Server Error");
#REQUIRED on error. An Object containing error information about the fault that
# occured before, during or after the call. This member MUST be entirely omitted
# if there was no error.
#When a remote procedure call fails, the Procedure Return object MUST contain the
# error member whose value is a JSON Object with the following properties members:
# * name REQUIRED. A String value that MUST read "JSONRPCError".
# * code REQUIRED. A Number value that indicates the actual error
# that occurred. This MUST be an integer between 100 and 999.
# * message REQUIRED. A String value that provides a short description
# of the error. The message SHOULD be limited to a single sentence.
# * error OPTIONAL. A JSON Null, Number, String or Object value that
# carries custom and application-specific error information. Error
# objects MAY be nested using this property.
if($this->isJSONOmitResponseWrapper)
print '{';
print '"error":{';
print '"name":"JSONRPCError",';
print '"code":' . $this->encodeJson($errno) . ',';
print '"message":' . $this->encodeJson($errstr);
if($this->isDebugMode){
print ',"error":';
print $this->encodeJson($faultDetails);
}
#print ',"error":' . ();
print '}';
if($this->isJSONOmitResponseWrapper)
print '}';
}
$this->printResponseEnd();
$this->isFinished = true;
exit;
}
function processRequest(){
if($this->isFinished)
return; //trigger_error("You may only call the 'processRequest' method once.");
if(isset($_COOKIE['JSONDateFormat']))
$this->JSONDateFormat = $_COOKIE['JSONDateFormat'];
if(isset($_COOKIE['dbResultIndexType']))
$this->dbResultIndexType = $_COOKIE['dbResultIndexType'];
$this->publicMethodName = '';
$requestParams = array();
$this->requestID = null;
#############################################################################################
# Parse request
#############################################################################################
#A remote procedure call is made by sending a request to a remote service using either HTTP
# POST or HTTP GET. How and where the call is encoded within the HTTP message depends on
# the HTTP method that is employed. In the case of HTTP POST, the procedure call is carried
# in the body of the HTTP message whereas in the case of HTTP GET, it is expressed along
# the path and query components of the HTTP Request-URI.
if($this->requestType == $this->XML){
/*BEGIN PHP5**
$doc = new DOMDocument();
$doc->loadXML($this->requestData);
**END PHP5*/
/*BEGIN PHP4*/
if(!($doc = domxml_open_mem($this->requestData, DOMXML_LOAD_PARSING, &$error)))
trigger_error("Parse error: " . join(" ... ", $error));
/*END PHP4*/
#The payload is in XML, a single <methodCall> structure.
if(($root = $doc->document_element()) && $root->node_name != 'methodCall')
trigger_error("The root of the document must be a 'methodCall' element.");
unset($root);
#The <methodCall> must contain a <methodName> sub-item, a string, containing the name of
# the method to be called. The string may only contain identifier characters, upper and
# lower-case A-Z, the numeric characters, 0-9, underscore, dot, colon and slash. It's
# entirely up to the server to decide how to interpret the characters in a methodName.
$methodNameElements = $doc->get_elements_by_tagname('methodName');
if(count($methodNameElements) &&
$methodNameElements[0]->first_child &&
$methodNameElements[0]->first_child->node_value)
{
$this->publicMethodName = $methodNameElements[0]->first_child->node_value;
if(preg_match("/[^A-Z0-9_\.:\/]/i", $this->publicMethodName))
trigger_error("The supplied method name \"" . $this->publicMethodName . "\" contains illegal characters. It may may only contain identifier characters, upper and lower-case A-Z, the numeric characters, 0-9, underscore, dot, colon and slash.");
}
#If the procedure call has parameters, the <methodCall> must contain a <params> sub-item.
# The <params> sub-item can contain any number of <param>s, each of which has a <value>.
#Iterate over all params
$paramElements = $doc->get_elements_by_tagname('param');
for($i = 0; $i < count($paramElements); $i++){
$paramEl = $paramElements[$i];
$valueEl = $paramEl->first_child;
while($valueEl && ($valueEl->node_type != 1 || $valueEl->node_name != 'value'))
$valueEl = $valueEl->next_sibling;
if(!$valueEl)
trigger_error("XML-RPC Parse Error: Expected a 'value' element child of the 'param' element.");
array_push($requestParams, $this->decodeXmlRpc($valueEl));
}
}
else if($this->requestType == $this->JSON){
#When using HTTP POST, the call is expressed in the HTTP request body as a JSON Object
# that carries the following members:
$request = $this->decodeJson($this->requestData);
if(!$request)
trigger_error("Parse error in JSON input.");
if(!is_array($request))
trigger_error("Invalid format for JSON-RPC request.");
#id OPTIONAL. This MUST be the same value as that of the id member of Procedure Call
# object to which the response corresponds. This member is maintained for backward
# compatibility with version 1.0 of the specification where it was used to correlate
# a response with its request. If the id member was present on the request, then the
# server MUST repeat it verbatim on the response.
if(!$this->isJSONOmitResponseWrapper && isset($request['id'])) # && ($this->responseType == $this->JSON || $this->responseType == $this->JAVASCRIPT)
$this->requestID = $request['id'];
#version REQUIRED. A String specifying the version of the JSON-RPC protocol to which
# the client conforms. An implementation conforming to this specification MUST use
# the exact String value of "1.1" for this member.
if(!isset($request['version']))
trigger_error("The JSON request object must provide the JSON-RPC version.");
if((float) $request['version'] > 1.1)
trigger_error("This JSON-RPC library supports version 1.1, but you are attempting to use version " . $request['version'] . ".");
#method REQUIRED. A String containing the name of the procedure to be invoked. Procedure
# names that begin with the word system followed by a period character (U+002E or ASCII 46)
# are reserved. In other words, a procedure named system.foobar is considered to have
# reserved semantics.
if(isset($request['method']) && $request['method'])
$this->publicMethodName = $request['method'];
#params OPTIONAL. An Array or Object that holds the actual parameter values for the
# invocation of the procedure.
if(isset($request['params']))
$requestParams = $request['params'];
}
#JSON Spec: 6.3. Call Encoding Using HTTP GET.
else if(isset($_SERVER['PATH_INFO'])) {
#First, an HTTP GET targeting a procedure on a JSON-RPC service is largely indistinguishable
# from a regular HTTP GET transaction. For this reason, there is no mention of of the
# JSON-RPC protocol version being used. Second, the entire call is encoded in the HTTP
# Request-URI. The procedure to invoke is appended to the location of the service, such
# that it appears as the last component of the URI path component. The call parameters
# appear as the query component and are named after the formal arguments of the target procedure.
#When using HTTP GET, the target procedure and parameters for the call are entirely expressed
# within the Request-URI of the HTTP message. The target procedure MUST appear as the last
# component of the Request-URI path component. The procedure's name MUST therefore be preceded
# by a forward-slash (U+002F or ASCII 47) but MUST NOT end in one.
$this->publicMethodName = substr($_SERVER['PATH_INFO'], 1);
if(strrpos($this->publicMethodName, '/') == strlen($this->publicMethodName)-1)
trigger_error("The procedure's name must not end in a forward-slash.");
#The parameters are placed in the query component (as defined in RFC 3986) of the Request-URI,
# which is then formatted using the same scheme as defined for HTML Forms with the get method.
# Each parameters consists of a name/position and value pair that is separated by the equal
# sign (U+003D or ASCII 61) and parameters themselves are separated by an ampersand (U+0026
# or ASCII 38):
$queryPostRequest = $_SERVER["QUERY_STRING"] . '&' . $this->requestData;
#if(preg_match("/=/", $queryPostRequest)){
$queryStringParams = split("&", $queryPostRequest);
foreach($queryStringParams as $param){ #foreach(array_keys($_GET) as $name){
if($param == '')
continue;
#After decoding, the server MUST treat all values as if they were sent as JSON String values.
# The server MAY then perform conversions at its discretion (on a best-attempt basis) if
# the formal arguments of the target procedure expects other non-String values. This
# specification does not define any conversion rules or methods.
#[NOTE: For this to work, $parametersForPrivateProcs must be populated earlier than this point.
# then we could get $parametersForPrivateProcs[$this->publicToPrivateMap[$this->publicMethodName]]]
# and determine the type cast for each parameter.
#Parameters named identically on the query string MUST be collapsed into an Array of String
# values using the same order in which they appear in the query string and identified by
# the repeating parameter name. For instance, the following query string specifies two
# parameters only, namely scale and city:
#It is specifically not possible to send parameters of type Object using HTTP GET.
$pair = split("=", $param, 2);
$key = urldecode($pair[0]);
#$value = isset($pair[1]) ? RPCServer::stringToType(urldecode($pair[1])) : null;
$value = isset($pair[1]) ? urldecode($pair[1]) : null;
if(isset($requestParams[$key])){
if(is_array($requestParams[$key]))
array_push($requestParams[$key], $value);
else $requestParams[$key] = array($requestParams[$key], $value);
}
else $requestParams[$key] = $value;
#if(isset($requestParams[$name])){
# if(is_array($requestParams[$name]))
# array_push($requestParams[$name], $_GET[$name]);
# else $requestParams[$name] = array($requestParams[$name], $_GET[$name]);
#}
#else $requestParams[$name] = $_GET[$name];
}
#}
}
else trigger_error("Unable to discern the requested method name. You must pass the request as " .
"XML-RPC document or JSON-RPC object in the POST data, or by passing the method " .
"name and parameters as path and query components of the HTTP Request-URI respectively.");
if(!$this->publicMethodName)
trigger_error("Method name not provided.");
###################################################################################
# Introspect the methods to determine their parameter lists
###################################################################################
$parametersForPrivateProcs = array();
/*BEGIN PHP5**
**END PHP5*/
/*BEGIN PHP4*/
/*END PHP4*/
#Using the Reflection API in PHP 5.1.0
if(class_exists('ReflectionFunction') && method_exists('ReflectionParameter', 'isArray')){
foreach(array_keys($this->publicToPrivateMap) as $publicProc){
$functionName = $this->publicToPrivateMap[$publicProc];
$rf = new ReflectionFunction($functionName);
$parametersForPrivateProcs[$functionName] = array();
foreach($rf->getParameters() as $param){ #$i =>
if($param->isPassedByReference())
trigger_error("User functions cannot be defined with parameters passed by reference. The function \"$functionName\" wants the parameter \"" . $param->getName() . "\" to be passed by reference.");
$paramDetails = array('name' => $param->getName(),
'type' => 'any');
if($param->isDefaultValueAvailable())
$paramDetails['default'] = $param->getDefaultValue();
if($param->isArray())
$paramDetails['type'] = 'arr';
else if($rc = $param->getClass()){
switch(strtolower($rc->getName())){
case 'datetime':
$paramDetails['type'] = 'obj';
break;
default:
trigger_error("The only class type that may be hinted is DateTime; you provided \"" . $rc->getName() . "\" in the function \"$functionName\".");
}
}
//$param->isOptional() and $param->allowsNull() are not needed since PHP will raise errors
// when call_user_func is invoked.
array_push($parametersForPrivateProcs[$functionName], $paramDetails);
}
}
unset($functionName);
unset($rf);
unset($rc);
unset($param);
unset($paramDetails);
}
#Using the PHP tokenizer before PHP 5.1.0
else {
$privateToPublicMap = array_flip($this->publicToPrivateMap);
if($this->isUsingIncludedFunctions)
$sourceFiles = get_included_files();
else
$sourceFiles = array();
array_push($sourceFiles, $_SERVER['SCRIPT_FILENAME']);
foreach($sourceFiles as $sourceFile){
if($sourceFile == __FILE__)
continue;
$tokens = token_get_all(file_get_contents($sourceFile));
#Remove all comments and whitespace tokens
for($i = 0; $i < count($tokens); ){
if(is_array($tokens[$i]) && ($tokens[$i][0] == T_WHITESPACE || $tokens[$i][0] == T_COMMENT))
array_splice($tokens, $i, 1);
else $i++;
}
$inClassDef = false;
$braceDepth = 0;
for($i = 0; $i < count($tokens); $i++){
#Skip all class definitions #################################
if(is_array($tokens[$i])){
if($tokens[$i][0] == T_CLASS){
$inClassDef = true;
continue;
}
}
else if($tokens[$i] == '{'){
$braceDepth++;
}
#If token is closing brace and the brace depth is now zero, then class definition complete
else if($tokens[$i] == '}' && (--$braceDepth == 0)){
$inClassDef = false;
++$i; #move to next token after class
}
if($inClassDef)
continue;
# Parse function declarations ################################################
if(is_array($tokens[$i]) && $tokens[$i][0] == T_FUNCTION){
#Get function name
++$i; #now $tokens[$i] == the function name
$functionName = $tokens[$i][1];
if(!isset($privateToPublicMap[$functionName]))
continue;
$parametersForPrivateProcs[$functionName] = array();
#Get parameter list
++$i; #now $tokens[$i] == '('
$parenDepth = 1;
#Iterate over every parameter for the function
for($i++; $i < count($tokens) && $parenDepth > 0; $i++){
if(is_array($tokens[$i])){
#Parameter name found: obtain all type information available
if($parenDepth == 1 && $tokens[$i][0] == T_VARIABLE){
$paramDetails = array('name' => substr($tokens[$i][1], 1),
'type' => 'any');
#Get the argument type
if(is_array($tokens[$i-1])){
#Object parameter (specifically DateTime)
if($tokens[$i-1][0] == T_STRING){
switch(strtolower($tokens[$i-1][1])){
case 'datetime':
#$paramType = "datetime";
#$paramType = "obj";
$paramDetails['type'] = 'obj';
break;
default:
trigger_error("The only class type that may be hinted is DateTime; you provided \"" . $tokens[$i-1][1] . "\" in the function \"$functionName\".");
}
}
#Array parameter
else if($tokens[$i-1][0] == T_ARRAY){
#$paramType = 'arr';
$paramDetails['type'] = 'arr';
}
}
#Of course data may not be passed from the client by reference
else if($tokens[$i-1] == '&')
trigger_error("User functions cannot be defined with parameters passed by reference. The function \"$functionName\" wants the parameter \"" . $paramDetails['name'] . "\" to be passed by reference.");
#Get the default value if it was was provided
if($this->defaultParametersPreserved && $tokens[$i+1] == '='){
#$paramDetails['default']
if(is_array($tokens[$i+2])){
switch($tokens[$i+2][0]){
case T_ARRAY:
#Iterate over the next tokens to compose a string of the entire
# literal array value used for the default; then eval this string
$evalVal = 'array(';
$arrayParenDepth = 1;
for($i += 3; $arrayParenDepth > 0; $i++){
if(is_array($tokens[$i+1])){
$evalVal .= $tokens[$i+1][1];
}
else {
$evalVal .= $tokens[$i+1];
if($tokens[$i+1] == ')')
$arrayParenDepth--;
else if($tokens[$i+1] == '(')
$arrayParenDepth++;
}
}
$paramDetails['default'] = eval("return $evalVal;"); #array(); #NOTE: MORE NEEDED HERE: recursive parsing of values
break;
case T_CONSTANT_ENCAPSED_STRING:
$i += 2;
$paramDetails['default'] = eval('return ' . $tokens[$i][1] . ';');
break;
case T_DNUMBER:
$i += 2;
$paramDetails['default'] = (double) $tokens[$i][1];
break;
case T_LNUMBER:
$i += 2;
$paramDetails['default'] = (int) $tokens[$i][1];
break;
case T_STRING:
$i += 2;
if(defined($tokens[$i][1])) #Bare string is a constant
$paramDetails['default'] = eval('return ' . $tokens[$i][1] . ';');
else
$paramDetails['default'] = $tokens[$i][1];
break;
}
}
}
array_push($parametersForPrivateProcs[$functionName], $paramDetails);
}
}
#Determine when the parameter list is entered and exited
else {
if($tokens[$i] == '(')
$parenDepth++;
else if($tokens[$i] == ')'){
$parenDepth--;
#This right paren marks the end of the parameter list
if($parenDepth == 0)
break;
}
}
}
}
}
}
unset($tokens);
unset($sourceFiles);
unset($sourceFile);
unset($paramDetails);
unset($parenDepth);
unset($functionName);
unset($braceDepth);
unset($inClassDef);
unset($privateToPublicMap);
#Iterate over all public methods and see if their parameter lists have been found
# by parsing the tokens of the PHP functions.
foreach($this->publicToPrivateMap as $publicProc => $privateProc){
if(!isset($parametersForPrivateProcs[$privateProc]))
trigger_error("Because this version of PHP does not support the Reflection API, unable to use the public method \"$publicProc\" because its associated private ".
"procedure is located in an included file; to get around this, you must explicitly ".
"allow externally defined functions by calling \$RPCServerInstance->useIncludedFunctions(true); this will decrease performance. ".
"Note you may not use non-user-defined functions as public methods (native PHP functions may not be used) when the Reflection API is not available.");
}
unset($publicProc);
unset($privateProc);
}
#############################################################################################
# Execute request
#############################################################################################
#A JSON-RPC service MUST, at a mimum, support a procedure called system.describe. The result
# of calling this procedure without any parameters MUST be a Service Description object
# as described in the next section.
if($this->publicMethodName == 'system.describe'){
#A service description is a JSON Object with the following members or properties:
$this->responseData = array();
#sdversion REQUIRED. A String value that represents the version number of this object
# and MUST read "1.0" for conforming implementations.
$this->responseData['sdversion'] = '1.0';
#name REQUIRED. A String value that provides a simple name for the method.
if(isset($this->name))
$this->responseData['name'] = $this->name;
#id REQUIRED. A String value that uniquely and globally identifies the service. The
# string MUST use the URI Generic Syntax (RFC 3986).
if(isset($this->id))
$this->responseData['id'] = $this->id;
#version OPTIONAL. A String value that indicates version number of the service and MAY
# be used by the applications for checking compatibility. The version number, when
# present, MUST include a major and minor component separated by a period (U+002E or
# ASCII 46). The major and minor components MUST use decimal digits (0 to 9) only. For
# example, use "2.5" to mean a major version of 2 and a minor version of 5. The use and
# interpretation of the version number is left at the discretion of the applications
# treating the Service Description.
if(isset($this->version))
$this->responseData['version'] = $this->version;
#summary OPTIONAL. A String value that summarizes the purpose of the service. This SHOULD
# be kept to a maximum of 5 sentences and often limited a single phrase like, "The News
# Search service allows you to search the Internet for news stories."
if(isset($this->summary))
$this->responseData['summary'] = $this->summary;
#help OPTIONAL. A String value that is a URL from where human-readable documentation about
# the service may be obtained.
if(isset($this->help))
$this->responseData['help'] = $this->help;
#address OPTIONAL. A String value that is the URL of the service end-point to which the remote
# procedure calls can be targeted. The protocol scheme of this URL SHOULD be http or https.
# Although this value is optional, it is highly RECOMMENDED that a service always publish its
# address so that a service description obtained indirectly can be used nonetheless to locate
# the service.
if(isset($this->address))
$this->responseData['address'] = $this->address;
#procs OPTIONAL. An Array value whose element contain Service Procedure Description objects,
# each of uniquely describes a single procedure. If the only description of each procedure
# that a service has is its name, then it MAY instead supply an Array of String elements for
# this member and where each element uniquely names a procedure.
$this->responseData['procs'] = array();
foreach($this->publicToPrivateMap as $publicName => $privateName){
#A procedure description is a JSON Object with the following members and properties:
$proc = array();
#name REQUIRED. A String value that provides a simple name for the method.
$proc['name'] = $publicName;
#params OPTIONAL. An Array value whose elements are either Procedure Parameter Description
# objects or String values. If an element each of uniquely describes a single parameter of
# the procedure. If the only description that is available of each parameter is its name,
# then a service MAY instead supply an Array of String elements for this member and where
# each element uniquely names a parameter and the parameter is assumed to be typed as "any".
# In either case, the elements of the array MUST be ordered after the formal argument list of
# the procedure being described. If this member is missing or the Null value then the procedure
# does not expect any parameters.
$proc['params'] = array();
foreach($parametersForPrivateProcs[$privateName] as $param){
array_push($proc['params'], array("name" => $param['name'], "type" => $param['type']));
}
#summary OPTIONAL. A String value that summarizes the purpose of the service. This SHOULD be
# kept to a maximum of 3 sentences and often limited to a single phrase like, "Lets you
# search for hyperlinks that have been tagged by particular tags."
#help OPTIONAL. A String value that is a URL from where human-readable documentation about the
# procedure may be obtained.
#idempotent OPTIONAL. A Boolean value that indicates whether the procedure is idempotent and
# therefore essentially safe to invoke over an HTTP GET transaction. This member MUST be
# present and true for the procedure to be considered idempotent.
#return OPTIONAL. An Object value that is structured after the Procedure Parameter Description
# and which describes the output from the procedure. Otherwise, if it is a String value, then
# it defines the type of the return value. If this member is missing or is the Null value
# then the return type of the procedure is defined to be "any".
array_push($this->responseData['procs'], $proc);
}
array_push($this->responseData['procs'],
array('name' => "system.setJSONDateFormat", 'params' =>
array(array('name' => 'formatName', 'type' => 'str')) #, 'default' => false
)
);
array_push($this->responseData['procs'],
array('name' => "system.setDBResultIndexType", 'params' =>
array(array('name' => 'indexType', 'type' => 'str')) #, 'default' => false
)
);
}
#system.listMethods -- This method may be used to enumerate the methods implemented by the
# XML-RPC server. The system.listMethods method requires no parameters. It returns an
# array of strings, each of which is the name of a method implemented by the server.
# From <http://xmlrpc.usefulinc.com/doc/reserved.html>
else if($this->publicMethodName == 'system.listMethods'){
$this->responseData = array_keys($this->publicToPrivateMap);
array_push($this->responseData, "system.setJSONDateFormat");
array_push($this->responseData, "system.setDBResultIndexType");
}
#system.methodSignature -- It returns an array of possible signatures for this method.
# A signature is an array of types. The first of these types is the return type of
# the method, the rest are parameters.
# From <http://xmlrpc.usefulinc.com/doc/reserved.html>
//else if($this->publicMethodName == 'system.methodSignature'){
// trigger_error('This implementation does not support "system.methodSignature" since PHP does not have type declarations.');
//
// #This method takes one parameter, the name of a method implemented by the XML-RPC server.
// if(count($requestParams) != 1) #!function_exists($requestParams[0])
// trigger_error('The "system.methodSignature" method must be supplied a method name.');
// if(!isset($this->publicToPrivateMap[$requestParams[0]]))
// trigger_error('The supplied method name "' . $requestParams[0] . '" does not exist.');
//}
#system.methodHelp -- This method takes one parameter, the name of a method
# implemented by the XML-RPC server. It returns a documentation string describing
# the use of that method. If no such string is available, an empty string is returned.
# From <http://xmlrpc.usefulinc.com/doc/reserved.html>
//else if($this->publicMethodName == 'system.methodHelp'){
// trigger_error('This implementation does not support "system.methodHelp" since PHP does not have type declarations.');
//}
#system.describeMethods -- This method accepts an optional array argument which is a list of
# strings representing method names. It returns a struct containing method and type
# descriptions. Each method description is a complex nested struct. If no argument is given,
# it will return descriptions for all methods which have a description registered. (Note that
# this may not be a comprehensive list of all available methods. system.listMethods should be
# used for that.) Each type description is a complex nested struct. All types referenced by
# the returned methods should be in the type list. Additional types may also be present.
# See <[email protected]>
//else if($this->publicMethodName == 'system.describeMethods'){
// trigger_error('This implementation does not support "system.describeMethods" since PHP does not have type declarations.');
//}
else if($this->publicMethodName == 'system.setJSONDateFormat'){
if(!count($requestParams))
trigger_error('Parameter must be either "ISO8601", "classHinting", "@ticks@", or "ASP.NET".');
$keys = array_keys($requestParams);
$this->responseData = $this->setJSONDateFormat($requestParams[$keys[0]]);
}
else if($this->publicMethodName == 'system.setDBResultIndexType'){
if(!count($requestParams))
trigger_error('Parameter must be either "NUM" or "ASSOC"..');
$keys = array_keys($requestParams);
$this->responseData = $this->setDBResultIndexType($requestParams[$keys[0]]);
}
#Execute the user-defined requested method ###########################################
else {
#Verify that the supplied method is valid
if(!isset($this->publicToPrivateMap[$this->publicMethodName]) || !function_exists($this->publicToPrivateMap[$this->publicMethodName])){
$this->isMethodNotFound = true;
trigger_error("The function referred to by the public method \"" . $this->publicMethodName . "\" does not exist.", E_USER_ERROR);
}
#If the value of the params member is any other type except JSON Object or Array,
# then the server MUST reject the call with an error.