Design of Flash chat based on HTTP (real-time communication)

The first two years have been a socket based flash chat code, but not all cases will choose (or have the conditions) to use the socket of the server. Real-time communication based on HTTP can be used in programs that are not too high on the demand for immediacy.

The principle is to obtain information through the client request, if there is no need for content, the background program will wait for a period of time (reaction speed), and then see if there is a need for results. Returns timeout information if no results are run more than once. Let the client connect again.

$times
				=
				0;
function Read ($id)
{
	$link
				= getmysq ();
	$rs
				=
				mysql_query ("Select Id,msg,t from C where id>". $id);
	Returns the result $result the JSON format
				=
				"[";
	$ns
				=
				true;
	while ($row
				=
				mysql_fetch_object ($rs))
	{
		$result
				=
				$result. " {"M": "". $row->msg. "", "." " I ":" "$row->id." "},";
		$ns
				=
				false;
	}
	$result
				=
				$result. " {}]";
	if ($ns)
	{
		mysql_close ($link);
		$times + +;
		5 requests also did not respond, do timeout judgment, let the client request
		if ($times
				>=
				5)
		{	
			echo
				"[]";
			return;
		}
		If there is currently no readable data, wait 1 seconds to read again, if it takes a shorter time (this is quicker), use Usleep, the unit is millisecond sleep
		(1);
		Read ($id);
	}
	else
	{
		echo
				$result;
		Mysql_close ($link);
	}

As code:

//http://localhost/ajax/chat.php?type=r&id=1 var lv:loadvars = new
Loadvars ();
Lv.load ("http://localhost/ajax/chat.php?type=r&id=2");
          Lv.ondata = function (d) {trace (d) var maxid = 0;
	JSON please go to json.org to download var data = (new JSON ()). Parse (d);
	str = "";
		for (var i=0;i<data.length-1;i++) {str + = data[i].m+ ' \ n ';
	Maxid = data[i].i;
	} M.text + = str;
	M.scroll = M.maxscroll;
Lv.load ("http://localhost/ajax/chat.php?type=r&id=" +MAXID);
}///Key.addlistener (this);
	OnKeyDown = function () {if (Key.getascii () = () {if (selection.getfocus () = = "_level0.smsg") sendmsg ();
				}     send.onpress = function () {sendmsg ();}   function sendmsg () {if (Smsg.text.length >
		1) {var slv:loadvars = new Loadvars ();
		Slv.load ("http://localhost/ajax/chat.php?msg=" +smsg.text);
	Smsg.text = ""; }
}

Flash source file Download:http://roading.net/res/blog/pic/httpchat.fla

Complete PHP Code:

<?php/* Establish a chat database to create a table:----Table structure ' C '--CREATE table ' C ' (' ID ' int (8) Not NULL auto_increment, ' msg ' var
char (character set UTF8 default null, ' t ' smallint (2) Not NULL default ' 0 ', PRIMARY KEY (' id ')); * * $type =
The first two years have been a socket based flash chat code, but not all cases will choose (or have the conditions) to use the socket of the server. Real-time communication based on HTTP can be used in programs that are not too high on the demand for immediacy.

The principle is to obtain information through the client request, if there is no need for content, the background program will wait for a period of time (reaction speed), and then see if there is a need for results. Returns timeout information if no results are run more than once. Let the client connect again.



$times
								=
								0;
function Read ($id)
{
	$link
								= getmysq ();
	$rs
								=
								mysql_query ("Select Id,msg,t from C where id>". $id);
	Returns the result $result the JSON format
								=
								"[";
	$ns
								=
								true;
	while ($row
								=
								mysql_fetch_object ($rs))
	{
		$result
								=
								$result. " {"M": "". $row->msg. "", "." " I ":" "$row->id." "},";
		$ns
								=
								false;
	}
	$result
								=
								$result. " {}]";
	if ($ns)
	{
		mysql_close ($link);
		$times + +;
		5 requests also did not respond, do timeout judgment, let the client request
		if ($times
								>=
								5)
		{	
			echo
								"[]";
			return;
		}
		If there is currently no readable data, wait 1 seconds to read again, if it takes a shorter time (this is quicker), use Usleep, the unit is millisecond sleep
		(1);
		Read ($id);
	}
	else
	{
		echo
								$result;
		Mysql_close ($link);
	}




As code:



//http://localhost/ajax/chat.php?type=r&id=1 var lv:loadvars = new Load
Vars ();
Lv.load ("http://localhost/ajax/chat.php?type=r&id=2");
          Lv.ondata = function (d) {trace (d) var maxid = 0;
	JSON please go to json.org to download var data = (new JSON ()). Parse (d);
	str = "";
		for (var i=0;i<data.length-1;i++) {str + = data[i].m+ ' \ n ';
	Maxid = data[i].i;
	} M.text + = str;
	M.scroll = M.maxscroll;
Lv.load ("http://localhost/ajax/chat.php?type=r&id=" +MAXID);
}///Key.addlistener (this);
	OnKeyDown = function () {if (Key.getascii () = () {if (selection.getfocus () = = "_level0.smsg") sendmsg ();
								}     send.onpress = function () {sendmsg ();}   function sendmsg () {if (Smsg.text.length >
		1) {var slv:loadvars = new Loadvars ();
		Slv.load ("http://localhost/ajax/chat.php?msg=" +smsg.text);
	Smsg.text = ""; }
}


Flash source file Download:http://roading.net/res/blog/pic/httpchat.fla

Complete PHP Code:



___fckpd___2
get["type"]; If
The first two years have been a socket based flash chat code, but not all cases will choose (or have the conditions) to use the socket of the server. Real-time communication based on HTTP can be used in programs that are not too high on the demand for immediacy.

The principle is to obtain information through the client request, if there is no need for content, the background program will wait for a period of time (reaction speed), and then see if there is a need for results. Returns timeout information if no results are run more than once. Let the client connect again.



$times
								=
								0;
function Read ($id)
{
	$link
								= getmysq ();
	$rs
								=
								mysql_query ("Select Id,msg,t from C where id>". $id);
	Returns the result $result the JSON format
								=
								"[";
	$ns
								=
								true;
	while ($row
								=
								mysql_fetch_object ($rs))
	{
		$result
								=
								$result. " {"M": "". $row->msg. "", "." " I ":" "$row->id." "},";
		$ns
								=
								false;
	}
	$result
								=
								$result. " {}]";
	if ($ns)
	{
		mysql_close ($link);
		$times + +;
		5 requests also did not respond, do timeout judgment, let the client request
		if ($times
								>=
								5)
		{	
			echo
								"[]";
			return;
		}
		If there is currently no readable data, wait 1 seconds to read again, if it takes a shorter time (this is quicker), use Usleep, the unit is millisecond sleep
		(1);
		Read ($id);
	}
	else
	{
		echo
								$result;
		Mysql_close ($link);
	}




As code:



//http://localhost/ajax/chat.php?type=r&id=1 var lv:loadvars = new Load
Vars ();
Lv.load ("http://localhost/ajax/chat.php?type=r&id=2");
          Lv.ondata = function (d) {trace (d) var maxid = 0;
	JSON please go to json.org to download var data = (new JSON ()). Parse (d);
	str = "";
		for (var i=0;i<data.length-1;i++) {str + = data[i].m+ ' \ n ';
	Maxid = data[i].i;
	} M.text + = str;
	M.scroll = M.maxscroll;
Lv.load ("http://localhost/ajax/chat.php?type=r&id=" +MAXID);
}///Key.addlistener (this);
	OnKeyDown = function () {if (Key.getascii () = () {if (selection.getfocus () = = "_level0.smsg") sendmsg ();
								}     send.onpress = function () {sendmsg ();}   function sendmsg () {if (Smsg.text.length >
		1) {var slv:loadvars = new Loadvars ();
		Slv.load ("http://localhost/ajax/chat.php?msg=" +smsg.text);
	Smsg.text = ""; }
}


Flash source file Download:http://roading.net/res/blog/pic/httpchat.fla

Complete PHP Code:



___fckpd___2
get["type" = = = "R") {$id =
The first two years have been a socket based flash chat code, but not all cases will choose (or have the conditions) to use the socket of the server. Real-time communication based on HTTP can be used in programs that are not too high on the demand for immediacy.

The principle is to obtain information through the client request, if there is no need for content, the background program will wait for a period of time (reaction speed), and then see if there is a need for results. Returns timeout information if no results are run more than once. Let the client connect again.



$times
								=
								0;
function Read ($id)
{
	$link
								= getmysq ();
	$rs
								=
								mysql_query ("Select Id,msg,t from C where id>". $id);
	Returns the result $result the JSON format
								=
								"[";
	$ns
								=
								true;
	while ($row
								=
								mysql_fetch_object ($rs))
	{
		$result
								=
								$result. " {"M": "". $row->msg. "", "." " I ":" "$row->id." "},";
		$ns
								=
								false;
	}
	$result
								=
								$result. " {}]";
	if ($ns)
	{
		mysql_close ($link);
		$times + +;
		5 requests also did not respond, do timeout judgment, let the client request
		if ($times
								>=
								5)
		{	
			echo
								"[]";
			return;
		}
		If there is currently no readable data, wait 1 seconds to read again, if it takes a shorter time (this is quicker), use Usleep, the unit is millisecond sleep
		(1);
		Read ($id);
	}
	else
	{
		echo
								$result;
		Mysql_close ($link);
	}




As code:



//http://localhost/ajax/chat.php?type=r&id=1 var lv:loadvars = new Load
Vars ();
Lv.load ("http://localhost/ajax/chat.php?type=r&id=2");
          Lv.ondata = function (d) {trace (d) var maxid = 0;
	JSON please go to json.org to download var data = (new JSON ()). Parse (d);
	str = "";
		for (var i=0;i<data.length-1;i++) {str + = data[i].m+ ' \ n ';
	Maxid = data[i].i;
	} M.text + = str;
	M.scroll = M.maxscroll;
Lv.load ("http://localhost/ajax/chat.php?type=r&id=" +MAXID);
}///Key.addlistener (this);
	OnKeyDown = function () {if (Key.getascii () = () {if (selection.getfocus () = = "_level0.smsg") sendmsg ();
								}     send.onpress = function () {sendmsg ();}   function sendmsg () {if (Smsg.text.length >
		1) {var slv:loadvars = new Loadvars ();
		Slv.load ("http://localhost/ajax/chat.php?msg=" +smsg.text);
	Smsg.text = ""; }
}


Flash source file Download:http://roading.net/res/blog/pic/httpchat.fla

Complete PHP Code:



___fckpd___2
get["id"];
Read ($id); } else {$msg =
The first two years have been a socket based flash chat code, but not all cases will choose (or have the conditions) to use the socket of the server. Real-time communication based on HTTP can be used in programs that are not too high on the demand for immediacy.

The principle is to obtain information through the client request, if there is no need for content, the background program will wait for a period of time (reaction speed), and then see if there is a need for results. Returns timeout information if no results are run more than once. Let the client connect again.



$times
								=
								0;
function Read ($id)
{
	$link
								= getmysq ();
	$rs
								=
								mysql_query ("Select Id,msg,t from C where id>". $id);
	Returns the result $result the JSON format
								=
								"[";
	$ns
								=
								true;
	while ($row
								=
								mysql_fetch_object ($rs))
	{
		$result
								=
								$result. " {"M": "". $row->msg. "", "." " I ":" "$row->id." "},";
		$ns
								=
								false;
	}
	$result
								=
								$result. " {}]";
	if ($ns)
	{
		mysql_close ($link);
		$times + +;
		5 requests also did not respond, do timeout judgment, let the client request
		if ($times
								>=
								5)
		{	
			echo
								"[]";
			return;
		}
		If there is currently no readable data, wait 1 seconds to read again, if it takes a shorter time (this is quicker), use Usleep, the unit is millisecond sleep
		(1);
		Read ($id);
	}
	else
	{
		echo
								$result;
		Mysql_close ($link);
	}




As code:



//http://localhost/ajax/chat.php?type=r&id=1 var lv:loadvars = new Load
Vars ();
Lv.load ("http://localhost/ajax/chat.php?type=r&id=2");
          Lv.ondata = function (d) {trace (d) var maxid = 0;
	JSON please go to json.org to download var data = (new JSON ()). Parse (d);
	str = "";
		for (var i=0;i<data.length-1;i++) {str + = data[i].m+ ' \ n ';
	Maxid = data[i].i;
	} M.text + = str;
	M.scroll = M.maxscroll;
Lv.load ("http://localhost/ajax/chat.php?type=r&id=" +MAXID);
}///Key.addlistener (this);
	OnKeyDown = function () {if (Key.getascii () = () {if (selection.getfocus () = = "_level0.smsg") sendmsg ();
								}     send.onpress = function () {sendmsg ();}   function sendmsg () {if (Smsg.text.length >
		1) {var slv:loadvars = new Loadvars ();
		Slv.load ("http://localhost/ajax/chat.php?msg=" +smsg.text);
	Smsg.text = ""; }
}


Flash source file Download:http://roading.net/res/blog/pic/httpchat.fla

Complete PHP Code:



___fckpd___2


get["MSG"];
Write ($msg); function Write ($msg) {$link = GETMYSQ ();//If more than 20 data, clear $rs = mysql_query ("SELECT count (ID) as Num from C"
");
$row = Mysql_fetch_object ($RS);  if ($row->num >) {$rs = mysql_query (' delete from C ');}//$rs = mysql_query ("INSERT INTO
C (msg,t) VALUES ("$msg", 1) ");
$id = mysql_insert_id ();
Mysql_close ($link);
}//$times = 0; function Read ($id) {$link = GETMYSQ (); $rs = mysql_query ("Select Id,msg,t from C where id>". $id);//$resu
lt = "[";
$ns = true; while ($row = Mysql_fetch_object ($rs)) {$result = $result. " {"M": "". $row->msg. "", "." "
I ":" "$row->id." "},";
$ns = false; } $result = $result. "
{}]"; if ($ns) {mysql_close ($link); $times + +;//5 request also does not respond, make timeout judgment, let the client request if ($times >= 5) {echo "[]"; return;}//
If there is currently no readable data, wait 1 seconds to reread the sleep (1);
Read ($id);
else {echo $result; Mysql_close ($link);}} function getmysq () {
$DBPW = "123456";
$dbname = "Chat";
				$link = mysql_connect ("localhost", "root", $DBPW) or die ("Could not connect:".
Mysql_error ());
mysql_select_db ($dbname);
return $link; }?>