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Martijn Moeling
martijn at xs4us.nu
Fri Feb 22 07:42:39 EST 2008
Graham, Sorry for the delay I have been extremely busy on some other stuff. > modules=filesInUserDirectory(req.session.user) > for module in modules: > module.append( apache.import_module(module) > return module.index(req,*args,**kwargs) # return apache.OK? > ......... (some code) > return apache.OK > As you can see the line "modules=filesInUserDirectory(req.session.user)" loads a tuple with modules in the userdirectory to import over the stable versions. Then I have to iterate to see which ones I nee to import, please note that this is explanational code not actual code, I'm designing not implementing. what does the line: "return module.index(req,*args,**kwargs) # return apache.OK?" do, and what if I return Apache.OK, I do not understand (or find explanation of the "return module.index(req,*args,**kwargs)" part. It seems to me that in this way I cannot load more than one module and I should (re)load all modules in the userdir..... Martijn ________________________________ Van: Graham Dumpleton [mailto:graham.dumpleton at gmail.com] Verzonden: wo 13.02.2008 0:40 Aan: Martijn Moeling CC: mod_python at modpython.org Onderwerp: Re: [mod_python] mod_python.Importer.path; set dynamically On 12/02/2008, Martijn Moeling <martijn at xs4us.nu> wrote: > Graham, > > Thank you, I did not mess around with it yet, I am planning a > versioning system to be added to my webbased development platform. > I am still having some trouble with my webdav module, I have to taccle > that one first. > > Your help is usefull one question though: > > say the inporterpath is set to: > > ".../python_modules/me:.../python_modules" > > in the apacheconfig the importerpath is set to .../python_modules > > in both directories stays: > > modulex.py ( in the me directory is the lates version) > > > in my handler module: > > import modulex > > de handler(req): > ....... (some code) > if req.debug and req.session.loggedIn: > req.options['mod_python.path'] = ".../me:../" > importedModules=[] > modules=filesInUserDirectory(req.session.user) > for module in modules: > module.append( apache.import_module(module) > return module.index(req,*args,**kwargs) # return apache.OK? > ......... (some code) > return apache.OK > > what happens to the interpreter for the next requests? which "modulex" > is used ? The are supposed to get the "stable" one from .../ > python_modules/ Yes. Should always get the one from path specified in Apache configuration. The dynamic change is only going to apply to those imports done from handler or as a side effect of running the handler. > I don't understand what the return line does, what happens if I return > apache.OK in this case? Huh. At least I am a bit confused by your question as the code: for module in modules: module.append( apache.import_module(module) return module.index(req,*args,**kwargs) # return apache.OK? ......... (some code) doesn't make much sense to me. Don't understand why you are trying to iterate over a list of modules to import. Graham > Martijn > > On Feb 5, 2008, at 11:12 AM, Graham Dumpleton wrote: > > > Sorry for the delay. > > > > To make things work transparently across a lot of modules, for both > > import_module() and 'import' where possible, what you can do is modify > > the value of option 'mod_python.importer.path' dynamically from code. > > This can be done from memory using: > > > > req.options['mod_python.importer.path'] = "...." > > > > You obviously can query this first if you need to somehow manipulate > > it to add stuff. > > > > All you then need is a level of indirection. Has to be from inside of > > handler, can't be at global scope. So, > > /var/www/python_modules/index.py might do: > > > > def index(req, *args, **kwargs): > > req.options['mod_python.importer.path'] = \ > > '/var/www/python_modules/%s:/var/www/python_modules' % req.user > > module = apache.import_module('index-core') > > return module.index(req, *args, **kwargs) > > > > If there is only one level of module imports, you could also do just: > > > > def index(req, *args, **kwargs): > > module = apache.import_module('index-core', \ > > path=['/var/www/python_modules/%s:/var/www/python_modules' % > > req.user])) > > return module.index(req, *args, **kwargs) > > > > but think that if subdirectory uses 'import', then it might not look > > in all the directories. Can't remember how it works now. > > > > Anyway the suggestion is look at changing req.options if you haven't > > already. > > > > Graham > > > > On 01/02/2008, Martijn Moeling <martijn at xs4us.nu> wrote: > >> > >> > >> > >> Graham, > >> > >> As you might remember I added a MySQLdb section to session. > >> (to be able to save sessions across computers) > >> > >> In my system a lot of additional data is added to the req object, > >> which is > >> passed > >> around. in my case it is req.Session.user. > >> > >> (I do not use http based auth, since this is in conflict with my > >> web based > >> desktop) > >> > >> nevertheless, i can change your "example code" to my needs, consider > >> req.user as the distinguisher for ease of thinking. > >> > >> Martijn > >> > >> > >> > >> > >> -----Original Message----- > >> From: Graham Dumpleton [mailto:graham.dumpleton at gmail.com] > >> Sent: Thu 31.01.2008 23:03 > >> To: Martijn Moeling > >> Cc: mod_python at modpython.org > >> Subject: Re: [mod_python] mod_python.Importer.path; set dynamically > >> > >> On 01/02/2008, Martijn Moeling <martijn at xs4us.nu> wrote: > >>> Hi! > >>> > >>> I am an extensive mod_python user and my system needs something > >>> special. > >>> > >>> Consider the following: > >>> > >>> in httpd.conf I have : > >>> > >>> PythonOption mod_python.importer.path ["/var/www/python_modules"] > >>> > >>> /var/www/html/index.py is linked to ../python_modules/index.py > >>> > >>> the python_modules directory has subdirectories, like; developer1, > >>> developer2 > >>> > >>> the python_modules contains stable modules and developerX holds > >> development > >>> versions. > >>> > >>> I have load balancing with multiple frond-ends (apache/MP) and one > >> backend > >>> (MySQL). > >>> > >>> I would like to dynamically change the mod_python.importer.path so > >>> that > >>> developer1 runs code in the corresponding subdir if the module > >>> exists, > >>> else fall back to the python_modules directory. > >>> > >>> Any tips, suggestions, remarks? > >> > >> What is the distinguisher used to know which developer it is? Are you > >> using something like Basic authentication and so could distinguish > >> based on req.user? > >> > >> If you tell me what the distinguisher is, probably have an idea. > >> > >> Graham > >> > >> > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mm_cfg_has_not_been_edited_to_set_host_domains/pipermail/mod_python/attachments/20080222/e02452ae/attachment.html
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