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Codepad.org, a pastebin that executes code
- bootload 19y ago"... Codepad.org, a pastebin that executes code ..." Very nice. Tried "import this" & "hello world in c". There is a poll over on arclanguage that asks if users want this type of functionality (hosted arc repl). I was surprised that more didn't want this type of feature to hack with Arc ~ "A hosted repl" : http://arclanguage.org/item?id=4070 http://arclanguage.org/item?id=4070
- simianstyle 19y agoWill there be any PHP support?
- christefano 19y agoIf there were it would mean the end of codepad.org. Think of the security implications of allowing anyone to run PHP on their server.
- davidw 19y agoAfaik, the only (reasonably common) languages with good sandboxes are Tcl and Java. Like they said above, they're the ones building the sandbox, not the language.
- immad 19y agoYou can map down a few languages to JVM executable bytecode, can't you?
- LogicHoleFlaw 19y agoLua has excellent support for building sandboxes for untrusted user code.
- davidw 19y agoInteresting - but what do you mean 'building' sandboxes?
- tokipin 19y agoi'm not exactly sure what he's talking about, but there's 2 things Lua has here. one is that the language is functional, so you can replace, alter, or remove the dangerous functions. the other is that you can specify the variable 'environment' of a function with a table (Lua's hash.) so you can construct its environment in an 'opt-in' basis and know for sure everything you're allowing the function to do is safe. and of course these things would be meaningless if built-in functions didn't behave like user functions
- jamongkad 19y agoUpmodded and done for Lua.
- aaroniba 19y agoIn what way does Java provide sandboxing of untrusted code?
- wallflower 19y agoUntrusted Java web start applications and Java applets can't do anything that could harm the real operating system. We had to buy and keep on renewing an expensive code-signing cert so our app could save a local file. Every once in a while, a security researcher claims to have gotten untrusted bytecode to run outside the boundaries of the sandbox.
- rcoder 19y agoThink of the security implications of allowing anyone to run any language on their server. It doesn't matter if it's PHP, Ruby, or C++, since they all allow shell and filesystem access, unbounded recursion, and all the other goodies that make sandboxing interesting. The trick would be to run PHP as a command-line scripting language, just like the others.
- tlrobinson 19y agoI would be more worried about C... which this already runs (apparently securely)
- jamongkad 19y agoOh just quit it. You and I both know that PHP can be made to run safely in this type of environment.
- jamongkad 19y agoHere here! why isn't there any PHP support?
- sah 19y agoPHP is one of the most requested languages. Support is on the way, probably sometime in the next couple weeks.
- mikecotton 19y agoThis is sweet. So useful for getting help with code or showing someone how to do something.
- derefr 19y agoI somewhat implemented this idea before (but just with Ruby, so obviously a much smaller project.) At the time, one of my biggest to-dos was AJAX support, to allow two people (i.e. a teacher and student) to play with a piece of code together as if they were on the same machine, with either person being able to hit "re-run" at any time and both seeing the updated output. Then I started getting into the details of trying to create a shared interactive debugger, and it started to get out of my range of ability ;). One suggestion for this, though, copied from something I did in my little project: provide another field (optional, perhaps hidden by default) for batch STDIN, so it doesn't crash on the sample here (a simple Ruby call to gets): http://codepad.org/xz0E5olm http://codepad.org/xz0E5olm
- paulgb 19y agoCool. This is one of those things I didn't know I needed, but give it a week and I won't be able to live without it ;).
- deleted 19y ago[deleted]
- alus 19y agohttp://codepad.org/pclJNMvg http://codepad.org/pclJNMvg
- kilowatt 19y agoyou're doing it wrong http://codepad.org/0COPIsn9 http://codepad.org/0COPIsn9
- albertcardona 19y agohttp://codepad.org/H2wMdxsA http://codepad.org/H2wMdxsA Didn't know this one about python. Thanks kilowatt. By the way I can't "paste and run": Error 500 Internal Server Error. Looks like the site is popular as it gets (well deserved).
- pageman 19y agowow. that worked.http://codepad.org/sXwnOWm4 http://codepad.org/sXwnOWm4
- pageman 19y agonice. http://codepad.org/28pDYynB http://codepad.org/28pDYynB
- slackerIII 19y agoVery cool stuff. How are you keeping the backend secure? You should put up a page of the most popular code samples :) And of course, let people vote them up and down.
- sah 19y agoThe basic strategy is to run untrusted code (including compilers) under ptrace to disallow a bunch of system calls. It's also chroot jailed, and subject to resource limits and a timeout. There are more details at http://codepad.org/about http://codepad.org/about Popular code samples are a good idea! I'll add that to the to-do list.
- slackerIII 19y agoAh, thanks -- the about link is not so obvious with a really wide screen browser. Since I think every single person is going to try to do something naughty to your system, a list of the most creative attempts to hack it would be cool too.
- michaelneale 19y agoNot a bad research idea.
- henning 19y agoDarn, my code snippet to call system("rm -rf /") was met with some nonsense about forking disallowed.
- johnrob 19y agoTimeout is working: http://codepad.org/nQQKVWfa http://codepad.org/nQQKVWfa
- cnu 19y agoYeah. http://codepad.org/GH5l8Dgl http://codepad.org/GH5l8Dgl :)
- andr 19y agoI tried to write an infinite loop in C, but couldn't remember what I had to include. FAIL.
- sah 19y agoNothing: http://codepad.org/t74Brroa http://codepad.org/t74Brroa
- rms 19y agoUpvoted!
- ghiotion 19y agoNo lisp? No arc? ;) Seriously, that's really cool. I want to break it now.
- sah 19y agoIt has scheme! (PLT, too, so I guess arc would be easy to add.)
- bouncingsoul 19y agoSuggestion: Since it's intended for code you should explicitly declare a monospaced font for the textarea. Safari uses a sans serif by default.
- sah 19y agoWill do. Thanks for pointing this out.
- raju 19y agoVery, very nice. Love it. I agree with paulgb, this is something I never thought I would ever find useful, but I can already see myself sharing code snippets with others. I might be getting greedy, but how about syntax highlighting? Although CodePad is really cool. Bravo! Keep up the great work...
- jey 19y agoThere are several pastebins with syntax highlighting: http://rafb.net/paste http://rafb.net/paste http://pastie.caboo.se http://pastie.caboo.se http://pastebin.com/ http://pastebin.com/
- thomasfl 19y agoCodepad have syntax highligthing. At least for ruby http://codepad.org/i30lM3MM http://codepad.org/i30lM3MM
- vlad 19y agoReally cool. I thought of something related yesterday, which would be a place where people could submit code to get comments and feedback from the community about how they would have coded something differently. It would be useful for both newbies, business people, experienced programmers, web programmers, and people who've known COBOL for 20 years and want to learn about new languages. And, for each program, someone could submit code that does the same thing in a different language, especially web languages. This is really awesome and would facilitate this very easily! A good way to learn the proper way to do something, especially with web languages that may change every major version, is by asking questions of experts in an IRC chat, and then watch them argue amongst each other about the best way to implement something. This would solve that problem by letting people browse, search, or reference a particular post or example or add on to it. I'm thinking of a wiki/social news/forum/code execution app.
- staticshock 19y agothe individual components of what you're talking about basically exist: http://refactormycode.com/ http://refactormycode.com/ - comments on people's code, discussions about refactoring http://rosettacode.org/ http://rosettacode.org/ - common pieces of code implemented in different languages
- thorax 19y agoThis reminds me a bit of that site Utility Mill, but, of course, that one is for long-term versioned Python code. Nice work.
- mixmax 19y agoWelcome to hacker news. Hope you stick around :-)
- newt0311 19y agoAwesome. Future suggestion (for python), add in some external modules like scipy. Then it would be possible to send examples of some of the more obscure modules. Really nice app.
- jsmcgd 19y agoReally cool. Well done!
- tokipin 19y agoLua would be a nice and easy addition. in particular WoW uses it for its UI mods
- wastedbrains 19y agoI could see this being incredibly useful, there has been tons of code pasting, but it will make things a lot cleaner and simpler being able to check out fully functioning code while discussing the problem with someone. Now all it needs is an embeddable widget and this would take over coding blogs and forums.
- tokipin 19y agoa timer might be nice for comparing algorithms and languages
- pageman 19y agoI agree. Especially if you're solving and comparing projecteuler.net problems/solutions :)
- andreyf 19y agoWhy not include a prettier editor? http://www.cdolivet.net/editarea/ http://www.cdolivet.net/editarea/ Or maybe open an API so that other people can extend it?
- tlrobinson 19y agoHow about some JavaScript support. Here's I'll help: document.write(eval(inputString)); Of course that lacks any sort of security measures...
- miratom 19y agoc/c++ is broken. Doesn't support this: int x = 4; x++; printf("x: %d\n",x); How can you say you support c/c++ when you don't support ++?
- sah 19y agoYou're doing it wrong: C: http://codepad.org/6vIUD7fk http://codepad.org/6vIUD7fk C++: http://codepad.org/QEuJE8LX http://codepad.org/QEuJE8LX