<?php
// SOAP server class

// for example usage, see the test_server.php file.

/*  changelog:
2001-07-05
- detection of character encoding in Content-Type header. server
will now call the soap_parser object with the specified encoding
- server will now return the Content-Type header with the sender's encoding type specified
must still learn more bout encoding, and figure out what i have to do to be able to
make sure that my response is *actually* encoded correctly
2001-07-21
- force proper error reporting for windows compatibility
2001-07-27
- get_all_headers() check for windows compatibility

*/

// make errors handle properly in windows
error_reporting(2039);

class soap_server
{
	function soap_server()
	{
		// create empty dispatch map
		$this->dispatch_map = array();
		$this->debug_flag = True;
		$this->debug_str = '';
		$this->headers = '';
		$this->request = '';
		$this->xml_encoding = 'UTF-8';
		$this->fault = false;
		$this->fault_code = '';
		$this->fault_str = '';
		$this->fault_actor = '';
		// for logging interop results to db
		$this->result = 'successful';
	}

	// parses request and posts response
	function service($data)
	{
		// $response is a soap_msg object
		$response = $this->parse_request($data);
		$this->debug("parsed request and got an object of this class '".get_class($response)."'");
		$this->debug("server sending...");
		// pass along the debug string
		if($this->debug_flag)
		{
			$response->debug($this->debug_str);
		}
		$payload = $response->serialize();
		// print headers
		if($this->fault)
		{
			$header[] = "HTTP/1.0 500 Internal Server Error\r\n";
		}
		else
		{
			$header[] = "HTTP/1.0 200 OK\r\n";
			$header[] = "Status: 200\r\n";
		}
		$header[] = "Server: SOAPx4 Server v0.344359s\r\n";
		$header[] = "Connection: Close\r\n";
		$header[] = "Content-Type: text/xml; charset=$this->xml_encoding\r\n";
		$header[] = "Content-Length: ".strlen($payload)."\r\n\r\n";
		reset($header);
		foreach($header as $hdr)
		{
			header($hdr);
		}
		print $payload;
	}

	function parse_request($data='')
	{
		global $HTTP_SERVER_VARS;

		$this->debug("entering parse_request() on ".date("H:i Y-m-d"));
		$request_uri = $HTTP_SERVER_VARS["REQUEST_URI"];
		$this->debug("request uri: $request_uri");
		// get headers
		if(function_exists("getallheaders"))
		{
			$this->headers = getallheaders();
			foreach($this->headers as $k=>$v)
			{
				$dump .= "$k: $v\r\n";
			}
			// get SOAPAction header
			if($this->headers["SOAPAction"])
			{
				$this->SOAPAction = str_replace('"','',$this->headers["SOAPAction"]);
				$this->service = $this->SOAPAction;
			}
			// get character encoding
			if(ereg("=",$this->headers["Content-Type"]))
			{
				$this->xml_encoding = str_replace("\"","",substr(strstr($this->headers["Content-Type"],"="),1));
			}
			elseif(ereg("^text/xml",$this->headers["Content-Type"]))
			{
				$this->xml_encoding = "us-ascii";
			}
			$this->debug("got encoding: $this->xml_encoding");
		}
		$this->request = $dump."\r\n\r\n".$data;
		// parse response, get soap parser obj
		$parser = CreateObject('phpgwapi.soap_parser',$data);
		// get/set methodname
		$this->methodname = $parser->root_struct_name;
		$this->debug("method name: $this->methodname");

		// does method exist?
		if(function_exists($this->methodname))
		{
			$this->debug("method '$this->methodname' exists");
		}
		else
		{
			/* phpgroupware customization - createobject based on methodname */
			list($app,$class,$method) = explode('.',$this->methodname);
			$obj = CreateObject(sprintf('%s.%s',$app,$class));
			/*
			// "method not found" fault here
			$this->debug("method '$obj->method' not found!");
			$this->result = "fault: method not found";
			$this->make_fault("Server","method '$obj->method' not defined in service '$this->service'");
			return $this->fault();
			*/
		}

		// if fault occurred during message parsing
		if($parser->fault())
		{
			// parser debug
			$this->debug($parser->debug_str);
			$this->result = "fault: error in msg parsing or eval";
			$this->make_fault("Server","error in msg parsing or eval:\n".$parser->get_response());
			// return soapresp
			return $this->fault();
		// else successfully parsed request into soapval object
		}
		else
		{
			// get eval_str
			$this->debug("calling parser->get_response()");
			// evaluate it, getting back a soapval object
			if(!$request_val = $parser->get_response())
			{
				return $this->fault();
			}
			// parser debug
			$this->debug($parser->debug_str);
			if(get_class($request_val) == "soapval")
			{
				if (is_object($obj))
				{
					/* Add the function to the server map */
					$in  = "array('" . implode("','",$obj->soap_functions[$method]['in']) . "')";
					$out = "array('" . implode("','",$obj->soap_functions[$method]['out']) . "')";
					$evalmap  = "\$this->add_to_map(\$this->methodname,$in,$out);";
					eval($evalmap);
				}
				/* verify that soapval objects in request match the methods signature */
				if($this->verify_method($request_val))
				{
					$this->debug("request data - name: $request_val->name, type: $request_val->type, value: $request_val->value");
					if($this->input_value)
					{
						/* decode the soapval object, and pass resulting values to the requested method */
						if(!$request_data = $request_val->decode())
						{
							$this->make_fault("Server","Unable to decode response from soapval object into native php type.");
							return $this->fault();
						}
						$this->debug("request data: $request_data");
					}

					/* if there are return values */
					if($this->return_type = $this->get_return_type())
					{
						$this->debug("got return type: '$this->return_type'");
						/* if there are parameters to pass */
						if($request_data)
						{
							if (is_object($obj))
							{
								$code = "\$method_response = call_user_method(\$method,\$obj,";
								$this->debug("about to call method '$class -> $method'");
							}
							else
							{
								$code = "\$method_response = call_user_func(\$this->methodname,";
								$this->debug("about to call method '$this->methodname'");
							}
							/* call method with parameters */
							$this->debug("about to call method '$class -> $method'");
							while(list($x,$y) = each($request_data))
							{
								$code .= "\$request_data[$x]" . ',';
							}
							$code = substr($code,0,-1) .");";
							if(eval($code))
							{
								if (is_object($obj))
								{
									$this->make_fault("Server","Method call failed for '$obj->method' with params: ".join(",",$request_data));
								}
								else
								{
									$this->make_fault("Server","Method call failed for '$this->methodname' with params: ".join(",",$request_data));
								}
								return $this->fault();
							}
						}
						else
						{
							/* call method w/ no parameters */
							if (is_object($obj))
							{
								$this->debug("about to call method '$obj->method'");
								if(!$method_response = call_user_method($method,$obj))
								{
									$this->make_fault("Server","Method call failed for '$obj->method' with no params");
									return $this->fault();
								}
							}
							else
							{
								$this->debug("about to call method '$this->methodname'");
								if(!$method_response = call_user_func($this->methodname))
								{
									$this->make_fault("Server","Method call failed for '$this->methodname' with no params");
									return $this->fault();
								}
							}
						}
					/* no return values */
					}
					else
					{
						if($request_data)
						{
							/* call method with parameters */
							$code = "\$method_response = call_user_method(\$method,\$obj,";
							while(list($x,$y) = each($request_data))
							{
								$code .= "\$request_data[$x]" . ',';
							}
							$code = substr($code,0,-1) .");";
							$this->debug("about to call method '$obj->method'");
							eval($code);
						}
						else
						{
							/* call method w/ no parameters */
							$this->debug("about to call method '$obj->method'");
							call_user_method($method,$obj);
						}
					}
					/* return fault */
					if(get_class($method_response) == "soapmsg")
					{
						if(eregi("fault",$method_response->value->name))
						{
							$this->fault = True;
						}
						$return_msg = $method_response;
					}
					else
					{
						/* return soapval object */
						
						if(get_class($method_response) == "soapval")
						{
							$return_val = $method_response;
						/* create soap_val object w/ return values from method, use method signature to determine type */
						}
						else
						{
							$return_val = CreateObject('phpgwapi.soapval',$method,$this->return_type,$method_response);
						}
						$this->debug($return_val->debug_str);
						/* response object is a soap_msg object */
						$return_msg =  CreateObject('phpgwapi.soapmsg',$method."Response",array($return_val),$this->service);
					}
					if($this->debug_flag)
					{
						$return_msg->debug_flag = true;
					}
					$this->result = "successful";
					return $return_msg;
				}
				else
				{
					// debug
					$this->debug("ERROR: request not verified against method signature");
					$this->result = "fault: request failed validation against method signature";
					// return soapresp
					return $this->fault();
				}
			}
			else
			{
				// debug
				$this->debug("ERROR: parser did not return soapval object: $request_val ".get_class($request_val));
				$this->result = "fault: parser did not return soapval object: $request_val";
				// return fault
				$this->make_fault("Server","parser did not return soapval object: $request_val");
				return $this->fault();
			}
		}
	}

	function verify_method($request)
	{
		//return true;
		$this->debug("entered verify_method() w/ request name: ".$request->name);
		$params = $request->value;
		// if there are input parameters required...
		if($sig = $this->dispatch_map[$this->methodname]["in"])
		{
			$this->input_value = count($sig);
			if(is_array($params))
			{
				$this->debug("entered verify_method() with ".count($params)." parameters");
				foreach($params as $v)
				{
					$this->debug("param '$v->name' of type '$v->type'");
				}
				// validate the number of parameters
				if(count($params) == count($sig))
				{
					$this->debug("got correct number of parameters: ".count($sig));
					// make array of param types
					foreach($params as $param)
					{
						$p[] = strtolower($param->type);
					}
					// validate each param's type
					for($i=0; $i < count($p); $i++)
					{
						// type not match
						if(strtolower($sig[$i]) != strtolower($p[$i]))
						{
							$this->debug("mismatched parameter types: $sig[$i] != $p[$i]");
							$this->make_fault("Client","soap request contained mismatching parameters of name $v->name had type $p[$i], which did not match signature's type: $sig[$i]");
							return false;
						}
						$this->debug("parameter type match: $sig[$i] = $p[$i]");
					}
					return true;
				// oops, wrong number of paramss
				}
				else
				{
					$this->debug("oops, wrong number of parameter!");
					$this->make_fault("Client","soap request contained incorrect number of parameters. method '$this->methodname' required ".count($sig)." and request provided ".count($params));
					return false;
				}
			// oops, no params...
			}
			else
			{
				$this->debug("oops, no parameters sent! Method '$this->methodname' requires ".count($sig)." input parameters!");
				$this->make_fault("Client","soap request contained incorrect number of parameters. method '$this->methodname' requires ".count($sig)." parameters, and request provided none");
				return false;
			}
			// no params
		}
		elseif( (count($params)==0) && (count($sig) <= 1) )
		{
			$this->input_values = 0;
			return true;
		}
		else
		{
			//$this->debug("well, request passed parameters to a method that requires none?");
			//$this->make_fault("Client","method '$this->methodname' requires no parameters. The request passed in ".count($params).": ".@implode(" param: ",$params) );
			return true;
		}
	}

	// get string return type from dispatch map
	function get_return_type()
	{
		if(count($this->dispatch_map[$this->methodname]["out"]) >= 1)
		{
			$type = array_shift($this->dispatch_map[$this->methodname]["out"]);
			$this->debug("got return type from dispatch map: '$type'");
			return $type;
		}
		return false;
	}

	// dbg
	function debug($string)
	{
		if($this->debug_flag)
		{
			$this->debug_str .= "$string\n";
		}
	}

	// add a method to the dispatch map
	function add_to_map($methodname,$in,$out)
	{
		$this->dispatch_map[$methodname]["in"] = $in;
		$this->dispatch_map[$methodname]["out"] = $out;
	}

	// set up a fault
	function fault()
	{
		return CreateObject('phpgwapi.soapmsg',
			"Fault",
			array(
				"faultcode" => $this->fault_code,
				"faultstring" => $this->fault_str,
				"faultactor" => $this->fault_actor,
				"faultdetail" => $this->fault_detail.$this->debug_str
			),
			"http://schemas.xmlsoap.org/soap/envelope/"
		);
	}

	function make_fault($fault_code,$fault_string)
	{
		$this->fault_code = $fault_code;
		$this->fault_str = $fault_string;
		$this->fault = true;
	}
}
?>