World: r3wp
[!Cheyenne] Discussions about the Cheyenne Web Server
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Robert 24-May-2009 [4910x3] | No, I load the answer HTML page and insert some HTML on the fly before returning the page via a PRINT. |
That's why I'm really wondering what's happening... | |
Any other idea? Until this is solved I will use POST but GET would really fit better. | |
Dockimbel 24-May-2009 [4913x2] | I've never encountered such issue. Can you reproduce it using the %show.rsp script? (you can find show.rsp in the source archive in %www/) |
It looks like you've added a reformed query-string to a URL already having a query-string. Are you using request/query-string? | |
Maxim 24-May-2009 [4915] | how do I use rconsole to tell cheyenne to reload a mod that has changed on disk... or does cheyenne detect mod-file changes and reload them automatically? |
Dockimbel 24-May-2009 [4916x2] | You can't. Mods are part of Cheyenne's kernel and the priority of each mod's callback is determined relatively to the other mods during Cheyenne boot (kind of competition for higher priority for each phase). Reloading a mod would required reloading all the mods, breaking most of the active connections (CGI, RSP, FastCGI,...). So the answer is : kill and reload Cheyenne. |
<required> = require | |
Maxim 24-May-2009 [4918x2] | with your permission I would like to rebrand ssh-admin to Cheyenne-admin. its like a stand-alone cpanel for cheyenne-based systems. All the current file and system commands options to manage the host server too will be complimented with any tools needed to configure and control cheyenne and any mods which are installed. |
ok, so you build static blocks of callbacks, when loading the mods... I guess. | |
Dockimbel 24-May-2009 [4920] | Exactly. |
Maxim 24-May-2009 [4921] | ok, so first cheyenne command in cheyenne-admin: "restart" :-) |
Dockimbel 24-May-2009 [4922] | I make a hash! list of all the phases' callbacks, so the impact on performances remains very low. |
Maxim 24-May-2009 [4923x2] | :-) |
so is the branding of cheyenne-admin ok with you? | |
Dockimbel 24-May-2009 [4925] | Go on for the name, my own Cheyenne admin panel is still at a very early stage. |
Maxim 24-May-2009 [4926] | mine is already capable of all the file browsing/upload/download to the server :-) |
BrianH 24-May-2009 [4927] | Link? :) |
Maxim 24-May-2009 [4928x5] | hehehe, will be providing the link to my site once its on-line, and then will start working on revault, for which I also purchased domains. |
I am using this site as a showcase for all of my work. including web, visual arts, music, design, programming, etc. | |
I have soooo much stuff on my disk which is just screaming to be released! | |
cheyenne-admin also has a *VERY* nice GUI, using GLayout. | |
already using cheyenne-admin to setup my bash user config files (~/.xxxx files) copying files locally, editing in ultra-edit, and uploading them back all via one click for xfer :-) I'm lazy hehehehe | |
Graham 24-May-2009 [4933] | what do you use the admin for ? |
Maxim 24-May-2009 [4934] | Note this is a linux server-side only tool (currently). currently: -remote browing of files in a gui. -uploading/downloading any files to/from the webserver -running command-lines remotely soon: -chmoding remote files -handling webserver start/stop/restart remotely. -more as time goes by. |
Graham 24-May-2009 [4935x2] | so you run the tool on the server PC? |
ie. you can't run it from a client PC? | |
Maxim 24-May-2009 [4937x4] | nope locally. |
I meant the server has to be a linux box. | |
anyone know if there is a detailed doc on sessions within cheyenne? | |
what we need with !cheyenne are minial examples of services and mods which implement all callbacks and give just a small comment on why and when it is called... this would help soo much in understanding how to implement cheyenne extensions. I am currently looking at the rsp code and its so huge and complex that its a big daunting to grasp the whole by looking at its parts. | |
Dockimbel 25-May-2009 [4941] | Mod-RSP is the most complex one and it does a lot of things. Sessions in Cheyenne are RSP-specific. There's a synchronization system in RSP sessions for protection of session data from corruption in concurrent executions. That may be easy to understand by just reading the code. Anyway, feel free to ask for explanations of specific code parts. |
Maxim 25-May-2009 [4942x5] | yep it is complex hehe |
you mean that if two requests are sent to different task-handlers they will resync when the later is done? | |
or is it rather some kind of semaphore? | |
there are too few comments (read as almost none ;-) in your code, and that doesn't slow down server in any way ;-D | |
I mean... more comments wouldn't slow down the server hehehe | |
Dockimbel 25-May-2009 [4947x3] | Sorry: that may be easy = that may not be easy |
It works using a semaphore (session/busy?: yes|no). It used to be very fined-grained with distinction of RSP scripts just reading session data from scripts modifying session data, but it was even more complex to maintain and the RSP source static analysis I was doing could never be 100% accurate (it''s easy to bypass any form of static analysis in R2). So now, it just blocks concurrency inside a user session (only 1 RSP script per user session allowed). | |
Session data is passed to task-handlers along with each request and saved back in main process on task-handlers response. | |
Maxim 25-May-2009 [4950x2] | so an rsp script cannot call another rsp script within its links for images, for example? |
well, actually it can... its just not going to download concurrently. | |
Dockimbel 25-May-2009 [4952x3] | Yes it can, from the server perspective, it's just a sequence of RSP requests. |
If you can think of a solid method for allowing concurrency in the same user session, while preserving session data from corruption, I'll be very interested. | |
I should add : without loosing performances. | |
Maxim 25-May-2009 [4955] | a part from having handler tcp interaction, I can't think of any a part from identifying a way to detect which session data is being used by both scripts. |
Dockimbel 25-May-2009 [4956] | It's always possible to write session data to disk or to a DB and rely on the DB locking system to ensure that data is safe, but there's a performance overhead in that case that I'm afraid, may not result in any speed gain for the user. It also requires to have a DB engine installed on all servers running Cheyenne using RSP sessions, which might be overkill in some situations. |
Maxim 25-May-2009 [4957x3] | this being said... mod-remark will be using persistent liquid nodes for session and post/get parameter side of things, and its possible that I might store session data outside of the server itself, using a liquid-tcp node. so that access to actuall session data could be brokered outside the server's jurisdiction, extremely efficiently, locked one value at a time. and any access/change could be perpetuated to other handlers when they attempt to lock to one session value. |
the idea being that interacting via xml request or full page refresh, with only part of a page parameters, creates the same output :-) | |
sorry, stores the same session information. allowing the same output depending on the required refresh. | |
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