Re: [PHP] RE: AJAX with POST
Ajax is asynchronous. The option of asynchronous or synchronous can be set
in the XMLHTTPRequest object (used by Ajax), but a synchronous call is not
Ajax.
Cheers,
Bruno.
2009/4/5 Phpster phps...@gmail.com
Ajax can be both async and sync. Itsbthe fourth param in the open call and
I believe by default it's a sync call not async
Bastien
Sent from my iPod
On Apr 4, 2009, at 21:33, Skip Evans s...@bigskypenguin.com wrote:
But my function using GET does seem to wait.
Granted I cobbled it together from various samples and didn't author it
from my own deep understanding of the exact process, but here's the snippet
that does the real work.
req.open('GET', url, false);
req.send(null);
if(req.responseText) {
if(req.responseText.substring(0,7) == 'debug!!') {
alert(req.responseText.substring(7));
}
}
return(req.responseText);
It seems to wait until it has data to return, because it works perfectly.
I can send it a URL from another function and get the data back from server
to the function as expected.
The only part of it I'm unsure of is this:
req.send(null);
What does that do? As I said, I cobbled this function from examples, got
it working, and presto, was off and running.
Skip
Brad Broerman wrote:
Well, as the A in Ajax is asynchronous, there's no real way to make it
wait. What you would normally do is use a callback:
function createXHRObject( )
{
if (typeof XMLHttpRequest != undefined)
{
return new XMLHttpRequest();
}
else if (typeof ActiveXObject != undefined)
{
return new ActiveXObject(Microsoft.XMLHTTP);
}
else
{
throw new Error(XMLHttpRequest not supported);
}
}
function sendAjaxRequest( websvcurl , params, callbackFn )
{
var xhrObject = createXHRObject();
xhrObject.open(POST, websvcurl, true);
xhrObject.onreadystatechange = function()
{
if (xhrObject.readyState == 4)
{
if( xhrObject.responseXML != null )
{
callbackFn (xhrObject.responseXML);
}
}
}
xhrObject.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
xhrObject.setRequestHeader(Content-length, params.length);
xhrObject.setRequestHeader(Connection, close);
xhrObject.send(params);
}
-Original Message-
From: Skip Evans [mailto:s...@bigskypenguin.com]
Sent: Saturday, April 04, 2009 5:30 PM
To: php-general@lists.php.net
Subject: AJAX with POST
Hey all,
At the risk of being told this is a PHP and not a JS list, but
also knowing the discussions on this list, to the benefit of
all I believe, very wildly, I'm posting this JS code snippet
for some advice.
As I posted earlier, my AJAX app that uses a GET to post to
the server (and get a response), fails on IE with larger data,
so I thought I'd take a shot at writing a POST function, but
so far I can get it to get the data back, but the problem is
by the time the data has come back the function has already
returned null back to the calling function. What I need this
function to do is wait for the data to come back and then send
it back to caller. Here's the function. Any advice would be
greatly appreciated. (The code to get the appropriate object
per browser has been omitted.)
http.open(POST, url, true);
//Send the proper header information along with the request
http.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
http.setRequestHeader(Content-length, url.length);
http.setRequestHeader(Connection, close);
http.send(url);
http.onreadystatechange = function() {//Call a function when
the state changes.
if(http.readyState == 4 http.status == 200) {
alert('['+http.responseText+']');
return (http.responseText);
}
}
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] RE: AJAX with POST
On Apr 4, 2009, at 21:33, Skip Evans s...@bigskypenguin.com wrote:
But my function using GET does seem to wait.
Granted I cobbled it together from various samples and didn't author
it from my own deep understanding of the exact process, but here's
the snippet that does the real work.
req.open('GET', url, false);
The false param above is the (a)synchronous flag. By setting it to
false, you are asking for a synchronous call, hence the wait. Set it
to true and the call becomes asynchronous and the user would not have
to wait. It would depend on what you are doing with the return call to
see if that flag is set appropriate to the application goals.
req.send(null);
if(req.responseText) {
if(req.responseText.substring(0,7) == 'debug!!') {
alert(req.responseText.substring(7));
}
}
return(req.responseText);
It seems to wait until it has data to return, because it works
perfectly. I can send it a URL from another function and get the
data back from server to the function as expected.
The only part of it I'm unsure of is this:
req.send(null);
The null indicates to the server that all data has been sent.
What does that do? As I said, I cobbled this function from examples,
got it working, and presto, was off and running.
Skip
Brad Broerman wrote:
Well, as the A in Ajax is asynchronous, there's no real way to
make it
wait. What you would normally do is use a callback:
function createXHRObject( )
{
if (typeof XMLHttpRequest != undefined)
{
return new XMLHttpRequest();
}
else if (typeof ActiveXObject != undefined)
{
return new ActiveXObject(Microsoft.XMLHTTP);
}
else
{
throw new Error(XMLHttpRequest not supported);
}
}
function sendAjaxRequest( websvcurl , params, callbackFn )
{
var xhrObject = createXHRObject();
xhrObject.open(POST, websvcurl, true);
xhrObject.onreadystatechange = function()
{
if (xhrObject.readyState == 4)
{
if( xhrObject.responseXML != null )
{
callbackFn (xhrObject.responseXML);
}
}
}
xhrObject.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
xhrObject.setRequestHeader(Content-length, params.length);
xhrObject.setRequestHeader(Connection, close);
xhrObject.send(params);
}
-Original Message-
From: Skip Evans [mailto:s...@bigskypenguin.com]
Sent: Saturday, April 04, 2009 5:30 PM
To: php-general@lists.php.net
Subject: AJAX with POST
Hey all,
At the risk of being told this is a PHP and not a JS list, but
also knowing the discussions on this list, to the benefit of
all I believe, very wildly, I'm posting this JS code snippet
for some advice.
As I posted earlier, my AJAX app that uses a GET to post to
the server (and get a response), fails on IE with larger data,
so I thought I'd take a shot at writing a POST function, but
so far I can get it to get the data back, but the problem is
by the time the data has come back the function has already
returned null back to the calling function. What I need this
function to do is wait for the data to come back and then send
it back to caller. Here's the function. Any advice would be
greatly appreciated. (The code to get the appropriate object
per browser has been omitted.)
http.open(POST, url, true);
//Send the proper header information along with the request
http.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
http.setRequestHeader(Content-length, url.length);
http.setRequestHeader(Connection, close);
http.send(url);
http.onreadystatechange = function() {//Call a function when
the state changes.
if(http.readyState == 4 http.status == 200) {
alert('['+http.responseText+']');
return (http.responseText);
}
}
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Hth
Bastien
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] RE: AJAX with POST
Well, as the A in Ajax is asynchronous, there's no real way to make it
wait. What you would normally do is use a callback:
function createXHRObject( )
{
if (typeof XMLHttpRequest != undefined)
{
return new XMLHttpRequest();
}
else if (typeof ActiveXObject != undefined)
{
return new ActiveXObject(Microsoft.XMLHTTP);
}
else
{
throw new Error(XMLHttpRequest not supported);
}
}
function sendAjaxRequest( websvcurl , params, callbackFn )
{
var xhrObject = createXHRObject();
xhrObject.open(POST, websvcurl, true);
xhrObject.onreadystatechange = function()
{
if (xhrObject.readyState == 4)
{
if( xhrObject.responseXML != null )
{
callbackFn (xhrObject.responseXML);
}
}
}
xhrObject.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
xhrObject.setRequestHeader(Content-length, params.length);
xhrObject.setRequestHeader(Connection, close);
xhrObject.send(params);
}
-Original Message-
From: Skip Evans [mailto:s...@bigskypenguin.com]
Sent: Saturday, April 04, 2009 5:30 PM
To: php-general@lists.php.net
Subject: AJAX with POST
Hey all,
At the risk of being told this is a PHP and not a JS list, but
also knowing the discussions on this list, to the benefit of
all I believe, very wildly, I'm posting this JS code snippet
for some advice.
As I posted earlier, my AJAX app that uses a GET to post to
the server (and get a response), fails on IE with larger data,
so I thought I'd take a shot at writing a POST function, but
so far I can get it to get the data back, but the problem is
by the time the data has come back the function has already
returned null back to the calling function. What I need this
function to do is wait for the data to come back and then send
it back to caller. Here's the function. Any advice would be
greatly appreciated. (The code to get the appropriate object
per browser has been omitted.)
http.open(POST, url, true);
//Send the proper header information along with the request
http.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
http.setRequestHeader(Content-length, url.length);
http.setRequestHeader(Connection, close);
http.send(url);
http.onreadystatechange = function() {//Call a function when
the state changes.
if(http.readyState == 4 http.status == 200) {
alert('['+http.responseText+']');
return (http.responseText);
}
}
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] RE: AJAX with POST
But my function using GET does seem to wait.
Granted I cobbled it together from various samples and didn't
author it from my own deep understanding of the exact process,
but here's the snippet that does the real work.
req.open('GET', url, false);
req.send(null);
if(req.responseText) {
if(req.responseText.substring(0,7) == 'debug!!') {
alert(req.responseText.substring(7));
}
}
return(req.responseText);
It seems to wait until it has data to return, because it works
perfectly. I can send it a URL from another function and get
the data back from server to the function as expected.
The only part of it I'm unsure of is this:
req.send(null);
What does that do? As I said, I cobbled this function from
examples, got it working, and presto, was off and running.
Skip
Brad Broerman wrote:
Well, as the A in Ajax is asynchronous, there's no real way to make it
wait. What you would normally do is use a callback:
function createXHRObject( )
{
if (typeof XMLHttpRequest != undefined)
{
return new XMLHttpRequest();
}
else if (typeof ActiveXObject != undefined)
{
return new ActiveXObject(Microsoft.XMLHTTP);
}
else
{
throw new Error(XMLHttpRequest not supported);
}
}
function sendAjaxRequest( websvcurl , params, callbackFn )
{
var xhrObject = createXHRObject();
xhrObject.open(POST, websvcurl, true);
xhrObject.onreadystatechange = function()
{
if (xhrObject.readyState == 4)
{
if( xhrObject.responseXML != null )
{
callbackFn (xhrObject.responseXML);
}
}
}
xhrObject.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
xhrObject.setRequestHeader(Content-length, params.length);
xhrObject.setRequestHeader(Connection, close);
xhrObject.send(params);
}
-Original Message-
From: Skip Evans [mailto:s...@bigskypenguin.com]
Sent: Saturday, April 04, 2009 5:30 PM
To: php-general@lists.php.net
Subject: AJAX with POST
Hey all,
At the risk of being told this is a PHP and not a JS list, but
also knowing the discussions on this list, to the benefit of
all I believe, very wildly, I'm posting this JS code snippet
for some advice.
As I posted earlier, my AJAX app that uses a GET to post to
the server (and get a response), fails on IE with larger data,
so I thought I'd take a shot at writing a POST function, but
so far I can get it to get the data back, but the problem is
by the time the data has come back the function has already
returned null back to the calling function. What I need this
function to do is wait for the data to come back and then send
it back to caller. Here's the function. Any advice would be
greatly appreciated. (The code to get the appropriate object
per browser has been omitted.)
http.open(POST, url, true);
//Send the proper header information along with the request
http.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
http.setRequestHeader(Content-length, url.length);
http.setRequestHeader(Connection, close);
http.send(url);
http.onreadystatechange = function() {//Call a function when
the state changes.
if(http.readyState == 4 http.status == 200) {
alert('['+http.responseText+']');
return (http.responseText);
}
}
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] RE: AJAX with POST
Ajax can be both async and sync. Itsbthe fourth param in the open call
and I believe by default it's a sync call not async
Bastien
Sent from my iPod
On Apr 4, 2009, at 21:33, Skip Evans s...@bigskypenguin.com wrote:
But my function using GET does seem to wait.
Granted I cobbled it together from various samples and didn't author
it from my own deep understanding of the exact process, but here's
the snippet that does the real work.
req.open('GET', url, false);
req.send(null);
if(req.responseText) {
if(req.responseText.substring(0,7) == 'debug!!') {
alert(req.responseText.substring(7));
}
}
return(req.responseText);
It seems to wait until it has data to return, because it works
perfectly. I can send it a URL from another function and get the
data back from server to the function as expected.
The only part of it I'm unsure of is this:
req.send(null);
What does that do? As I said, I cobbled this function from examples,
got it working, and presto, was off and running.
Skip
Brad Broerman wrote:
Well, as the A in Ajax is asynchronous, there's no real way to
make it
wait. What you would normally do is use a callback:
function createXHRObject( )
{
if (typeof XMLHttpRequest != undefined)
{
return new XMLHttpRequest();
}
else if (typeof ActiveXObject != undefined)
{
return new ActiveXObject(Microsoft.XMLHTTP);
}
else
{
throw new Error(XMLHttpRequest not supported);
}
}
function sendAjaxRequest( websvcurl , params, callbackFn )
{
var xhrObject = createXHRObject();
xhrObject.open(POST, websvcurl, true);
xhrObject.onreadystatechange = function()
{
if (xhrObject.readyState == 4)
{
if( xhrObject.responseXML != null )
{
callbackFn (xhrObject.responseXML);
}
}
}
xhrObject.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
xhrObject.setRequestHeader(Content-length, params.length);
xhrObject.setRequestHeader(Connection, close);
xhrObject.send(params);
}
-Original Message-
From: Skip Evans [mailto:s...@bigskypenguin.com]
Sent: Saturday, April 04, 2009 5:30 PM
To: php-general@lists.php.net
Subject: AJAX with POST
Hey all,
At the risk of being told this is a PHP and not a JS list, but
also knowing the discussions on this list, to the benefit of
all I believe, very wildly, I'm posting this JS code snippet
for some advice.
As I posted earlier, my AJAX app that uses a GET to post to
the server (and get a response), fails on IE with larger data,
so I thought I'd take a shot at writing a POST function, but
so far I can get it to get the data back, but the problem is
by the time the data has come back the function has already
returned null back to the calling function. What I need this
function to do is wait for the data to come back and then send
it back to caller. Here's the function. Any advice would be
greatly appreciated. (The code to get the appropriate object
per browser has been omitted.)
http.open(POST, url, true);
//Send the proper header information along with the request
http.setRequestHeader(Content-type,
application/x-www-form-urlencoded);
http.setRequestHeader(Content-length, url.length);
http.setRequestHeader(Connection, close);
http.send(url);
http.onreadystatechange = function() {//Call a function when
the state changes.
if(http.readyState == 4 http.status == 200) {
alert('['+http.responseText+']');
return (http.responseText);
}
}
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
Skip Evans
Big Sky Penguin, LLC
503 S Baldwin St, #1
Madison WI 53703
608.250.2720
http://bigskypenguin.com
Those of you who believe in
telekinesis, raise my hand.
-- Kurt Vonnegut
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
