Webware for Python

On 09/12/2002 11:39:13 PM Tavis Rudd wrote:

>Unfortunately not.  I've run into this before.  Making it possible would
>require huge changes.

Hmmm... I'm glad you replied Tavis, because the function was actually
written to make the "file" parameter used in Cheetah Template creation
accept relative paths.

What I'm doing in a servlet is:

class MyServlet(Page):
    def awake(self, trans):
        Page.awake(self, trans)
        t = Template(file=self.decodePath('MyFile'))
    ...

So, with this, an absolute path is computed for Template. However, the
obvious implication of this is that the template is being created during
each awake phase, which should not be necessary. I really want to
instantiate the template once only when the servlet is first instantiated.
i.e.:

class MyServlet(Page):
    def __init__(self, trans):
        Page.__init__(self)
        self.t = Template(file=self.decodePath('MyFile'))

    def awake(self, trans):
        ...


What else can I do to have Cheetah work with relative paths?


...Edmund.

Re: [Webware-discuss] Getting at serverSidePath earlier than awake phase From: Tavis Rudd <tavis@re...> - 2002-09-13 03:56 On September 12, 2002 08:46 pm, Edmund wrote: > On 09/12/2002 11:39:13 PM Tavis Rudd wrote: > >Unfortunately not. I've run into this before. Making it possible wou= ld > >require huge changes. > > Hmmm... I'm glad you replied Tavis, because the function was actually > written to make the "file" parameter used in Cheetah Template creation > accept relative paths. =2E.. > So, with this, an absolute path is computed for Template. However, the > obvious implication of this is that the template is being created durin= g > each awake phase, which should not be necessary. I really want to > instantiate the template once only when the servlet is first instantiat= ed. Just cache the template instance after the first awake() call. Add a boo= lean to check if it has already been done: _templateCreated =3D 0 def awake(self, trans): if not self._templateCreated: # create the template self._templateCreated =3D 1 # keep going with the rest of your code > What else can I do to have Cheetah work with relative paths? Nothing. This is a webware issue, not a Cheetah one. Cheetah works fine with relative paths, provided that they make sense from the current work= ing directory. ServerSidePaths are different from relative paths. Cheers, Tavis -------------------------------------------------------

Re: [Webware-discuss] Getting at serverSidePath earlier than awake phase From: Edmund Lian <elian@in...> - 2002-09-13 06:35 On 09/12/2002 11:39:13 PM Tavis Rudd wrote: >Unfortunately not. I've run into this before. Making it possible would >require huge changes. In this case, I couldn't take no for an answer, and couldn't sleep until I had a solution. Here it is: import sys absoluteFilename = sys._getframe().f_code.co_filename I don't know if using deep magic like this is a Good Thing(tm)*, but it works all the time. ...Edmund. * must be trademarked by Martha Stewart by now

Re: [Webware-discuss] Getting at serverSidePath earlier than awake phase From: Edmund Lian <elian@in...> - 2002-09-13 06:44 To get the equivalent of serverSidePath() in during servlet instantation, I wrote: >In this case, I couldn't take no for an answer, and couldn't sleep until I had a solution. Here it is: > >import sys >absoluteFilename = sys._getframe().f_code.co_filename > >I don't know if using deep magic like this is a Good Thing(tm)*, but it works all the time. With one caveat--the call to sys._getframe() has to be from within the servlet. Importing the code as a function won't work. There's got to be a way to get around this too... ...Edmund.

Re: [Webware-discuss] Getting at serverSidePath earlier than awake phase From: Edmund Lian <elian@in...> - 2002-09-13 06:55 Tavis (with apologies to all for the noise, but this is probably of general interest), I wrote: >With one caveat--the call to sys._getframe() has to be from within the servlet. >Importing the code as a function won't work. There's got to be a way to get >around this too... I've figured it out. Here's the final code to get the equivalent of serverSidePath() during servlet construction: In Page.py add something like: class Page: ... def myServerSidePath(self): return sys._getframe(1).f_code.co_filename In your servlet do: class MyServlet(Page): def __init__(self): myPath = self.myServerSidePath() The difference is the argument to sys._getframe. An argument of "1" will always return the filename of the *caller* of the method. I don't know how serverSidePath() is used elsewhere in Webware, otherwise I'd suggest just replacing the existing code in WebKit.Page with this. ...Edmund.

Re: [Webware-discuss] Getting at serverSidePath earlier than awake phase From: Tavis Rudd <tavis@re...> - 2002-09-13 17:38 Very nice!! I take back my answer. On September 12, 2002 11:55 pm, Edmund Lian wrote: > I've figured it out. Here's the final code to get the equivalent of > serverSidePath() during servlet construction: > > In Page.py add something like: > > class Page: > ... > def myServerSidePath(self): > return sys._getframe(1).f_code.co_filename > > > In your servlet do: > > class MyServlet(Page): > def __init__(self): > myPath =3D self.myServerSidePath() > > The difference is the argument to sys._getframe. An argument of "1" wil= l > always return the filename of the *caller* of the method. I don't know = how > serverSidePath() is used elsewhere in Webware, otherwise I'd suggest ju= st > replacing the existing code in WebKit.Page with this. > > ...Edmund.

Re: [Webware-discuss] Getting at serverSidePath earlier than awake phase From: Tavis Rudd <tavis@re...> - 2002-09-13 18:30 On September 12, 2002 11:55 pm, Edmund Lian wrote: > The difference is the argument to sys._getframe. An argument of "1" wil= l > always return the filename of the *caller* of the method. I don't know = how > serverSidePath() is used elsewhere in Webware, otherwise I'd suggest ju= st > replacing the existing code in WebKit.Page with this. I don't think that's a good idea while there is a requirement for the met= hod=20 to be called from a specific frame. However, this should definitely be a= dded=20 to the wiki site.

Re: [Webware-discuss] Getting at serverSidePath earlier than awake phase From: Daniel Newby <dnewby@no...> - 2002-09-13 21:03 Edmund Lian wrote: > To get the equivalent of serverSidePath() in during servlet instantation, I > wrote: > > > In this case, I couldn't take no for an answer, and couldn't sleep until I > > had a solution. Here it is: > > > > import sys > > absoluteFilename = sys._getframe().f_code.co_filename > > > > I don't know if using deep magic like this is a Good Thing(tm)*, but it > > works all the time. > > With one caveat--the call to sys._getframe() has to be from within the > servlet. Importing the code as a function won't work. There's got to be a > way to get around this too... But won't that give the pathname for the machine-generated code for PSP servelets, instead of the pathname of your original source file? (I'm away from my Webware stuff so I can't check.) BTW, I'm using the check-flag-and-cache approach for my navigation sidebar, and it works fine for both Python and PSP servelets. -- Daniel Newby, speaking for myself

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