i am trying to rewrite my code to support multithreading ,it is a simple code but i can't figure out how to do it,basically what it do is
request the first webpage with curl --> to get a unique id
use the unique id to request another page --> to get a session
use the session to request another page --->sleep() then do it again
now this is what a single thread do,but i want to create a lot of threads in the same time
what i did is ,create 3 sperate files
the first one create 10 sessions and save them in a txt file with other parameters (session1|unique_id1|paramter1|anotherparameter1)
the second file contain this code
$sessions = file('sessions.txt');
$WshShell = new COM("WScript.Shell");
foreach($sessions as $kk => $session) {
if (!empty($session)) {
$oExec = $WshShell - > Run("php requests.php $kk", 0, false);
}
}
it open the txt file,and foreach line it open the requests file with the line number in argv
and in the third file,it take the line number ,and open the sessions file ,retreive the paramater of the session and send requests with that session
so this is how i did my multithreading,but i feel like i wrote a php code with rocks
now i want to rewrite it without having to open 10 sperate php process
There really isn't a native way to do threading in PHP. The approach you took works, but I would approach it differently. It's possible to fork processes in PHP. This I've done and works well.
One approach is to use some messaging system like RabbitMQ and distribute the work that way. Basically an Actor or Pub-sub model.
Another approach that might work well for you would be "pthreads". http://php.net/manual/en/book.pthreads.php
I've not tried this method myself so I cannot give you details as to how well it does or doesn't work.
Hope this helps!
Related
I am using Birt 4.5 and PHP/MYSQL.
I am able to run birt reports with php. I have enabled tomcat and copied 'birt-runtime-4_5_0/WebViewerExample' to tomcat/webapps and renamed it to birt.
So I can run birt viewer with php;
<?php
$fname = "report/test.rptdesign&__showtitle=false";
$dest = "http://localhost:8081/birt/frameset?__report=";
$dest .= $fname;
header("Location: $dest" );
?>
Above code is working fine. But report connectstring already saved in test.rptdesign file.
I want to remove DB login credentials from test.rptdesign file and assign it while report open with PHP.
I have tried with report parameters. But all the parameters will display on browser address-bar.
Is there any secure way to do this? This is very important when we need to change the database location. It is very hard to change the data source of each and every .rptdesign file.
Thank You,
Supun
I don't believe using report parameters to handle a database connection is the right way. In addition to the address-bar problem you mentionned, it will cause unexpected issues: for example you won't be able to use this database to feed the dataset of another report parameter.
With Tomcat the best approach is to externalize the database connection in a connection pool: easy, robust, and reports might run significantly faster.
Alternatively the datasource can be externalized in a BIRT library (.rptlibrary) and shared across all report-designs: thus only the library needs to be updated when the database location is changing.
I agree with Dominique that sending the database parameters via the query is most likely an inappropriate solution - and you've not given any explanation of whether this is a requirement of the system.
But it is quite trivial to proxy the request via PHP and decorate the URL with the required parameters, something like...
<?php
$_GET['__showtitle']=$_GET['__showtitle'] ? $_GET['__showtitle'] : 'false';
$_GET['__report']=$fname; // NB this should be NULL in your code!
$_GET['dbuser']='a_db_user';
$_GET['passwd']='s3cr3t';
$qry=http_build_query($_GET);
$url="http://localhost:8081/birt/frameset?" . $qry;
// if its simply returning HTML, then just....
$fin=fopen($url, 'r');
while ($l=fgets($fin)) {
print $l;
}
exit;
If the returned content contains relative links the you'll need to rewrite the output stream. If the content type is unusual or you want to project other headers (e.g. for caching) to the browser, then you'll need to use Curl, capture the headers and relay them.
My problem is I need to fetch FOOBAR2000's title because that including information of playing file, so I create a execute file via Win32 API(GetWindowText(), EnumWindows()) and it's working good.
TCHAR SearchText[MAX_LOADSTRING] = _T("foobar2000");
BOOL CALLBACK WorkerProc(HWND hwnd, LPARAM lParam)
{
TCHAR buffer[MAX_TITLESTRING];
GetWindowText(hwnd, buffer, MAX_TITLESTRING);
if(_tcsstr(buffer, SearchText))
{
// find it output something
}
return TRUE;
}
EnumWindows(WorkerProc, NULL);
Output would look like "album artis title .... [foobar2000 v1.1.5]"
I created a php file like test.php, and use exec() to execute it.
exec("foobar.exe");
then in console(cmd) I use command to execute it
php test.php
It's working good too, same output like before.
Now I use browser(firefox) to call this php file(test.php), strange things happened.
The output only foobar2000 v1.1.5, others information gone ...
I think maybe is exec() problem? priority or some limitation, so I use C# to create a COM Object and register it, and rewrite php code
$mydll = new COM("FOOBAR_COMObject.FOOBAR_Class");
echo $mydll->GetFooBarTitle();
still same result, command line OK, but browser Fail.
My question is
Why have 2 different output between command line and browser. I can't figure it out.
How can I get correct output via browser.
or there is a easy way to fetch FOOBAR2000's title?
Does anyone have experience on this problem?
== 2012/11/28 edited ==
follow Enno's opinion, I modify http_control plug-in to add filename info, original json info is "track title".
modify as following
state.cpp line 380 add 1 line
+pb_helper1 = pfc::string_filename(pb_item_ptr->get_path());
pb_helper1x = xml_friendly_string(pb_helper1);
# 1: when firefox opens the php and it gets executed, it the context depends on the user which runs the php-container (apache), this is quite different from the commandline call which gets executed in your context
# 2 and 3: there seems to be more than one way for getting the title: use the foobar-sdk and create a module which simply reads the current title per api, then write your result in an static-html-document inside your http-root-folder OR use the http-client inside the sdk, with it, you do not need a wabserver, even better use a already implemented module: for instance foo_upnp or foo-httpcontrol
Good luck!
If your webserver runs as a service, in windows you need to enable "allow desktop interaction" for the service. Your php script runs as a child of the webserver process when requested via browser.
I'm having a multiplayer server that's using PHPSockets, and thus is written entirely in PHP.
Currently, whenever I'm making any changes to the PHP server-script I have to kill the script and then start it over again. This means that any users online is disconnected (normally not a problem because there aren't so many at the moment).
Now I am rewriting the server-script to use custom PHP classes and sorten things up a little bit (you don't want to know how nasty it looks today). Today I was thinking: "Shouldn't it be possible to make changes to the php source without having to restart the whole script?".
For example, I'm planning on having a main.php file that is including user.php which contains the class MyUser and game.php which contains the class MyGame. Now let's say that I would like to make a change to user.php and "reload" the server so that the changes to user.php goes into effect, without disconnecting any online users?
I tried to find other questions that answered this, the closest I got is this question: Modifying a running script and having it reload without killing it (php) , which however doesn't seem to solve the disconnection of online users.
UPDATE
My own solutions to this were:
At special occations, include the file external.php, which can access a few variables and use them however it'd like. When doing this, I had to make sure that there were no errors in the code as the whole server would crash if I tried accessing a method that did not exist.
Rewrite the whole thing to Java, which gave me the possibility of adding a plugin system using dynamic class reloading. Works like a charm. Bye bye PHP.
Shouldn't it be possible to make changes to the php source without having to restart the whole script?
[...]
I'm planning on having a main.php file that is including user.php
which contains the class MyUser
In your case, you can't. Classes can only be defined once within a running script. You would need to restart the script to have those classes redefined.
I am not too familiar with PHP but I would assume that a process is created to run the script, in doing so it copies the instructions needed to run the program and begins execution on the CPU, during this, if you were to "update" the instructions, you'd need to kill the process ultimate and restart it. Includes are a fancy way of linking your classes and files together but ultimately the processor will have that information separate from where the file of them are stored and it is ultimately different until you restart the process.
I do not know of any system in which you can create code and actively edit it and see the changes while that code is being run. Most active programs require restart to reload new source code.
Runkit will allow you to add, remove, and redefine methods (among other things) at runtime. While you cannot change the defined properties of a class or its existing instances, it would allow you to change the behavior of those objects.
I don't recommend this as a permanent solution, but it might be useful during development. Eventually you'll want to store the game state to files, a database, Memcache, etc.
How about storing your User object into APC cache while your main script loads from the cache and checks every so often for new opcode.
To include a function in the cache, you must include the SuperClosure Class. An example would be:
if (!apc_exists('area')) {
// simple closure
// calculates area given length and width
$area = new SuperClosure(
function($length, $width) {
return $length * $width;
}
);
apc_store('area', $area);
echo 'Added closure to cache.';
} else {
$func = apc_fetch('area');
echo 'Retrieved closure from cache. ';
echo 'The area of a 6x5 polygon is: ' . $func(6,5);
}
See here for a tutorial on APC.
Simple solution use $MyUser instead of MyUser
require MyUserV1.php;
$MyUser = 'MyUserV1';
$oldUser = new $MyUser('your name');
//Some time after
require MyUserV2.php;
$MyUser = 'MyUserV2';
$newUser = new $MyUser('your name');
Every declared class stay in memory but become unused when the last MyUserV1 logout
you can make them inherit from an abstract class MyUser for using is_a
You cannot include again a file with the same class, but you can do so with an array. You can also convert from array to class, if you really need to do so. This only applies to data, though, not to behavior (methods).
I don't know much about these things with the games on PC but you can try to get all the variables from your database for the user and then update the text fields or buttons using those variables
In web is using AJAX (change data without refreshing the page).Isn't one for programming?
I have a process defined in a batch file that runs 3 php scripts, one after another in sequence, and I want to create a web front-end for the process. The process is triggered when someone uploads a file using a webform.
I want the ability to notify the user after each script in the batch file is run with some useful messages, but I am not quite sure what the right way to go about is.
I am thinking in terms of javascript that sends request to the 3 php files in sequence, with the php scripts echoing the status messages as they are executed. But I would rather have the three files executed in a single trigger from the client instead of having javascript calling the the three scripts separately.
Any ideas whats the best way to go about it?
You could create a single php file that runs the 3 php script and echoes their ouputs. By executing a server side request trough AJAX (I suggest jQuery framework) the outputs may be collected and the client side scripts can process and show the results to the user.
Store messages in the database or other centralized storage system. Use an ajax call to pull the newest messages.
Send an ajax call to a php file on your server. You don't specify how your php scripts are running, but what I would do is include other the other php files (which would have functions to process whatever they're supposed to do) and then call the functions from the main file. These functions should return some sort of success/error messages that you can collect in an array. So something like this:
$response[] = firstFileProcessing(); //your function names should be better
$response[] = secondFileProcessing();
$response[] = thirdFileProcessing();
When all the scripts are done processing, do:
echo json_encode(array("responses" => $response));
Then back in your success function for the ajax call, you'd do:
var res = jQuery.parseJSON(response_from_server);
//or if you told ajax to expect a json response,
//response_from_server would automatically be an object based on the json sent
and step through each one to see what php said.
alert(res.responses[0]); //the first file said this
Or you could make your $response from php much more detailed - an array of its own, with $response['success'] = TRUE, $response['msg'] = "Worked!", etc - any amount of data.
Can I programmatically upload a file to the server (without client's interference) ? I know this is not possible in normal (.html) files. Is there anyway I can do it from .hta file? or any server side or plug-gin solution?
from an HTA, you can use the shell object to run commands just as if you were running from the command line - including FTP - but of course you'll need FTP credentials. since you said you'll be able to hardcode the files to be uploaded, i assume you have full access...
var shell = new ActiveXObject('wscript.shell');
var params = // this should be a string of ftp commands, like OPEN ftp.example.com USER PASS CWD somedir PUT c:\whatever.txt BYE
shell.run("%comspec% /c ftp.exe -i -s:" + params, 1, true);
Short answer is no.
It may be possible on some machines using a signed java applet - but from the wording of the question, that's going to be a very long juorney for you.
Based on your last comment, you might atleast need the user to load a web page. So based on an onload function, you can use an ajax hidden form to submit whatever files that you'd want to.
But getting information from your user without their knowledge might put you in a legal situation.
Good luck!!