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Nicholas Milkovits
nmilkovits at gmail.com
Thu Mar 29 14:25:01 EST 2007
nitin, print <some html> will print to stdout I think if you want to write html back to the requester you want to do something like: req.content_type = "text/html" req.write(<some string of html>) -nick On 3/29/07, mod_python-request at modpython.org <mod_python-request at modpython.org> wrote: > Send Mod_python mailing list submissions to > mod_python at modpython.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://mailman.modpython.org/mailman/listinfo/mod_python > or, via email, send a message with subject or body 'help' to > mod_python-request at modpython.org > > You can reach the person managing the list at > mod_python-owner at modpython.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Mod_python digest..." > > > Today's Topics: > > 1. Re: Hello (Graham Dumpleton) > 2. Re: connection to host server broken (Graham Dumpleton) > 3. Need Help ...Please!!! (nitin chandra) > 4. RE: how to use Mysql on mod_python+apache? (Martijn Moeling) > 5. Textbooks on psp programming? (Mark) > 6. RE: session variable value (partially) dissapearing > (Martijn Moeling) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 29 Mar 2007 08:05:19 +1000 > From: "Graham Dumpleton" <graham.dumpleton at gmail.com> > Subject: [mod_python] Re: Hello > To: " Idoia Villaci?n Z?rate " <fidita48 at hotmail.com> > Cc: mod_python at modpython.org > Message-ID: > <88e286470703281505q2a9a6a34g2c3d16365c9503a1 at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 29/03/07, Idoia Villacián Zárate <fidita48 at hotmail.com> wrote: > > > > > > > > Hello: > > > > I've looked the web you gave me, but I can't see anywhere how to change the > > configuration of my apache to choose the mod_python script instead of the > > CGI script. I also think that I have the lastest version od the mod_python > > (3.3.1). I'll be gratefull if you could help me or tell me how to resolve > > the problem. > > Please use reply-all when responding, thus keeping the conversation on > the mod_python mailing list. > > As to your problem, if you cannot ascertain from that document which > bits referred to how to configure Apache, then you need to perhaps > learn more about how to configure Apache and the language it uses to > refer to its directives and where to put them. On that I can only > suggest you go to the Apache documentation and start reading. Some > starting points are: > > http://httpd.apache.org/docs/2.2/ > http://httpd.apache.org/docs/2.2/configuring.html > http://httpd.apache.org/docs/2.2/sections.html > http://httpd.apache.org/docs/2.2/howto/cgi.html > > Also refer to the mod_python documentation to learn about its own > specific configuration directives: > > http://www.modpython.org/live/current/doc-html/inst-testing.html > http://www.modpython.org/live/current/doc-html/directives.html > > Beyond that we can't really help since you haven't actually included > in your email what snippet of Apache configuration you think you are > using to enable mod_python use in the first place. Thus, cannot say > how it is wrong, or how it is conflicting with existing CGI > configuration in your setup. > > The only thing we can tell you as we already have, is that error would > generally arise when your script is run as a CGI program and not > through mod_python. This is because the _apache module is a special > module not available from command line Python and is only available > when code is running inside of mod_python. That the module cannot be > found indicates the code isn't running under mod_python. > > Oh, and please do not go sending your complete Apache configuration, > just those bits which would be relevant, such as the mod_python and > CGI sections. > > Graham > > > > ------------------------------ > > Message: 2 > Date: Thu, 29 Mar 2007 12:05:37 +1000 > From: "Graham Dumpleton" <graham.dumpleton at gmail.com> > Subject: Re: [mod_python] connection to host server broken > To: "sikander hayat" <hayat221 at yahoo.com> > Cc: Mod_python at modpython.org, Jim Gallacher <jpg at jgassociates.ca> > Message-ID: > <88e286470703281905t5e864819gc1f1f64f8d832fed at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 28/03/07, sikander hayat <hayat221 at yahoo.com> wrote: > > Hi, > > > > I tried the testhandler and then looked at the first 100 entries of the > > error log and there it was...the segmentation fault. > > Yes, but what did the first 100 entries say? > > What are you actually saying here? Are you saying you triggered 100 > requests of the handler and only then did your handler crash Apache, > or that there was simply 100 unrelated entries that preceded the crash > point, where the crash was the outcome of the very first request? I > would help that you actually posted from the log the entry for the > crash and anything just prior to that point that seems relevant. > > It would also help that you post the snippet of your Apache > configuration so we can see how you have set it up to run mod_python > and what handler you might be triggering, whether it be your own or > one from mod_python such as publisher. > > > The code that i tried > > is as follows: > > > > from mod_python import apache > > > > import module2 > > But what is in module2. Did you put log statements in module2 so as to > see what was run in there when import was done and how far it got.? > > > apache.log_error(__file__ + " #3") > > > > def handler(req): > > > > req.content_type = "text/plain" > > req.write("Hello World!") > > > > return apache.OK > > > > Thanks > > Sikander > > > > Jim Gallacher <jpg at jgassociates.ca> wrote: > > sikander hayat wrote: > > > Hi, > > > > > > Thanks for your help. Just wanted to point out that, out of frustation, i > > installed mod_python 3.2.10 and discarded mod_python 3.3.1 and magically it > > all works fine !!! > > > > > > What I would like to conclude from this is, that there might be some > > dependency in 3.3.1 that caused havoc...(atleast for me). As pointed out > > previously, 3.3.1 constantly kept on giving the following errors: > > > > > > child pid 28468 exit signal Segmentation fault (11) > > > [Tue Mar 27 17:26:14 2007] [notice] child pid 28469 exit signal > > Segmentation fault (11) > > > [Tue Mar 27 17:26:40 2007] [error] [client 134.96.24.83] File does not > > exist: /opt/lampp/htdocs/favicon.ico > > > [Tue Mar 27 17:29:21 2007] [error] [client 134.96.24.83] File does not > > exist: /opt/lampp/htdocs/favicon.ico > > > > > > > > > Why this segmentation error with 3.3.1 > > > > Obviously we'd like to sort out why 3.3.1 is segfaulting. Did you try > > Graham's suggestion of doing: > > > > PythonHandler mod_python.testhandler > > > > and still get a segfault? If not, can you either try it, or share the > > contents of you index.py file that caused the problem? > > > > > and also, i had nothing to do with this favicon.ico. I do not have this > > icon and > > > do not intend to make one. Why and which process needs this icon... > > *wondering* > > > > This has nothing to do with mod_python. It's your browser that is > > requesting favicon.ico. You don't have one and apache logs that fact, > > and is standard behaviour for a missing file. If you don't intend to > > create one you better get used to having your error logs clogged with > > this message, as I believe some (all?) modern browsers automatically > > request it. > > > > Jim > > > > > Thanks, > > > Sikander > > > > > > > > > Graham Dumpleton wrote: On 26/03/07, sikander hayat wrote: > > >> Hi, > > >> > > >> I am using suse 10.1, Apache 2.2.4, python 2.5 and mod_python 3.3.1. > > >> > > >> The error log is as follows: > > >> [Mon Mar 26 10:16:48 2007] [warn] RSA server certificate is a CA > > certificate > > >> (BasicConstraints: CA == TRUE !?) > > >> [Mon Mar 26 10:16:48 2007] [warn] RSA server certificate CommonName (CN) > > >> `localhost' does NOT match server name!? > > >> [Mon Mar 26 10:16:48 2007] [notice] mod_python: Creating 8 session > > mutexes > > >> based on 256 max processes and 0 max threads. > > >> [Mon Mar 26 10:16:48 2007] [notice] mod_python: using mutex_directory > > /tmp > > >> [Mon Mar 26 10:16:48 2007] [notice] Apache/2.2.4 (Unix) DAV/2 > > mod_ssl/2.2.4 > > >> OpenSSL/0.9.8d mod_python/3.3.1 Python/2.5 PHP/5.2.1 > > >> mod_apreq2-20051231/2.5.7 m > > >> od_perl/2.0.2 Perl/v5.8.7 configured -- resuming normal operations > > >> [Mon Mar 26 10:17:04 2007] [error] [client 134.96.24.83] File does not > > >> exist: /opt/lampp/htdocs/favicon.ico > > >> [Mon Mar 26 10:17:35 2007] [notice] mod_python (pid=3230, > > >> interpreter='localhost'): Importing module > > >> '/opt/lampp/htdocs/parkweb/index.py' > > >> [Mon Mar 26 10:17:35 2007] [notice] mod_python (pid=3231, > > >> interpreter='localhost'): Importing module > > >> '/opt/lampp/htdocs/parkweb/index.py' > > >> [Mon Mar 26 10:17:36 2007] [notice] child pid 3230 exit signal > > Segmentation > > >> fault (11) > > >> [Mon Mar 26 10:17:36 2007] [notice] child pid 3231 exit signal > > Segmentation > > >> fault (11) > > >> > > >> I have recently upgraded to python 2.5. So, to say, i have 2 versions of > > >> python on my system. Will try to remove the older one and try again. > > > > > > To confirm whether that is necessary, set: > > > > > > PythonHandler mod_python.testhandler > > > > > > In the output from that just verify that the sys.path information is > > > correct for the version of Python you expect to use. From the above > > > log entries there probably isn't a problem with versions as mod_python > > > will actually log some warnings if it finds a different version of > > > Python than what it was compiled with and that isn't in the log > > > entries. > > > > > >> ****Why is it loading the module twice ...is that normal ??? > > > > > > Note how the 'pid' is different for each. This means that there were > > > two requests and that they so happened to be handled by different > > > Apache child processes. > > > > > >> Kindly let me know if something rings a bell. > > > > > > Since you are using Python 2.5, it should not be the expat version > > > problem as Python 2.5 is supposed to change things to avoid that one. > > > I would though still suspect that it is some versioning problem with > > > shared libraries. For example, if your web application uses some sort > > > of database and you also have PHP loaded and it is using some > > > different version of the database client library. This sort of > > > mismatch can cause a crash as one library will take precedence over > > > the other and if they are not compatible it can crash. > > > > > > What you may need to do is start adding debug into your code and the > > > framework it uses such that you output a log message before and after > > > every module import. For example: > > > > > > from mod_python import apache > > > > > > apache.log_error(__file__ + " #1") > > > import pyexpat > > > apache.log_error(__file__ + " #2") > > > import module2 > > > apache.log_error(__file__ + " #3") > > > > > > See how many of the messages come out in the Apache error log and slow > > > narrow it down to a specific module being importer causing the crash. > > > > > > If the module imports aren't the problem but something in handler > > > itself, do something similar, logging messages to the Apache log until > > > you find exactly what call causes it. > > > > > > Graham > > > > > >> Thanks, > > >> > > >> > > >> Graham Dumpleton wrote: > > >> On 24/03/07, Jim Gallacher wrote: > > >>> sikander hayat wrote: > > >>>> Hi all, > > >>>> > > >>>> My apache webserver on linux recently broke down, so i reinstalled it, > > >> along with mod_python. Having made the necessary changes in the conf file > > of > > >> apache, i tried some of the simple tests, such as mptest, but i keep on > > >> getting the following error. > > >>>> Connection to host server ... lost. > > >>>> > > >>>> Why is that, is it because of python or some apache setting. > > >>> Or network problems? > > >>> > > >>> What do you find in your apache logs? > > >> The Apache error log would be a good start, as it looks to me like > > >> your Apache child processes are crashing. You may find errors about > > >> segmentation violations or similar in the logs. If you do, check that > > >> the version of mod_python you are using is the correct one for the > > >> version of Python and Apache you are using. Having multiple versions > > >> of Python installed can also cause issues. > > >> > > >> BTW, are you using precompiled packages or compiling everything from > > >> source code? What operating system are you using? > > >> > > >> Graham > > >> > > >> > > >> > > >> ________________________________ > > >> Sucker-punch spam with award-winning protection. > > >> Try the free Yahoo! Mail Beta. > > >> > > >> > > > > > > > > > > > > --------------------------------- > > > The fish are biting. > > > Get more visitors on your site using Yahoo! Search Marketing. > > > > > > > > > > > ------------------------------------------------------------------------ > > > > > > _______________________________________________ > > > Mod_python mailing list > > > Mod_python at modpython.org > > > http://mailman.modpython.org/mailman/listinfo/mod_python > > > > > > > > > > ________________________________ > > Expecting? Get great news right away with email Auto-Check. > > Try the Yahoo! Mail Beta. > > > > > > > ------------------------------ > > Message: 3 > Date: Thu, 29 Mar 2007 17:24:38 +0530 > From: "nitin chandra" <nitinchandra1 at gmail.com> > Subject: [mod_python] Need Help ...Please!!! > To: mod_python at modpython.org > Message-ID: > <965122bf0703290454x1fd3ed25y9deda0f1b4f7d9f9 at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Hi Everyone! > > I need some help here. > > I have a WinXP laptop, installed with Python2.4, Apache 2.0.59, > mod_python-3.2.8.win32-py2.4.exe, > psycopg2-2.0.5.1.win32-py2.4-pg8.2.0-release.exe, PostgreSQL 8.2. > > Now i have created a DB as "nitin" and a user "nitin", further i > created 13 more tables within the DB. One of the > tables is named as "area". This, "area", table has 11 fields. Two > fields are left blank as they will > be entered through a web interface. > > So i am trying to read the complete row and display the existing data > in the table. The display of the data is to be done in various forms > fields over the Web-interface / html(or CSS). Lastly, Enter data in > blank form fields and update the table. > > > I am writing a 'area.py' script for the above. > > ====================== > > from mod_python import apache > import sys, psycopg > > conn = psycopg.connect("dbname=nitin user=nitin passwd=" "") > > curs = conn.cursor() > > > > <head><title>Owners' Details Entered</title></head> > <body bgcolor="#87CEFA"> > <table align=center border=2 cellpadding=6> > > > curs.execute("SELECT * FROM area") > rows = curs.fetchall() > > print <tr><td>rows</td></tr> > > > </table> > </body> > </head> > > =================== > > And it does not work. When I load the page in IE, HTML works but the > rest of the code is displayed as it is,i.e. as text. > > Are there any samples available on the net where i can look at. > > Please guide. > > Thanks > Reg > Nitin > > > ------------------------------ > > Message: 4 > Date: Thu, 29 Mar 2007 13:58:55 +0200 > From: "Martijn Moeling" <martijn at xs4us.nu> > Subject: RE: [mod_python] how to use Mysql on mod_python+apache? > To: <mod_python at modpython.org> > Message-ID: > <B6C73A5E30565245BB6D32B5F5DF7A52120333 at sense.emmastraat.pijnacker> > Content-Type: text/plain; charset="US-ASCII" > > I don't see the fuzz about mysql either. It is rock solid and I use(d) > it a lot in production environment, together with mysqldb and mod > python. > > When using it with mod python there are a few things to be aware of. > > First make sure the connection and cursor objects are not created > globally I use: > > > Def handler(req): > .. > .. > req.db = MySQLdb.connect( host=Chost, user=Cuser, > passwd=Cpasswd, db=Cdb, use_unicode=True, charset='utf8') > req.cursor = req.db.cursor() > > #next I close the database in a fixup handler > > req.register_cleanup(closedb,req) > > ... > > And the closedb function > > def closedb(req): > try: > req.cursor.close() > req.cursor=None > req.db.close() > req.db = None > except: > pass > > with this method of using mysqldb, the database connection is closed > properly, even if the handler code runs into an error, if not and an > error occurs and the connection is kept by MySQL and at the end it will > run out of resources (and/or memory whatever comes first). > > And to the off topic part: > People seem to blame software when it behaves as designed and they don't > read manuals and/or know background theory, please keep non mod_python > issues out of this list and respect choices made by other people, even > if you think it is a bad one. The question was "How can I use Mysql with > MP". > > To explain this further, I see people asking questions about MP running > on windows, personally I have the opinion that Microsoft sells crap but > that is since I know about unixes, OpenVMS, MVS etc. etc. and windows. > But I'll never suggest : trow out windows and install xxxxx since the > other person might be more familiar with windows, that is the tool of > choice for him. > > Getting started with MP has a steep learning curve, not because MP is > difficult to use, but since a lot of different technologies and > standards apply (file protection, apache, mime types, character sets, > HTML, javascript, xml, htttp (headers!), browser incompatibility, > python, etc, etc. > I have over 30 years of professional experience and I had a lot to learn > when I started with MP. > > I am thinking of publishing parts of my system on a dedicated MP > examples website, since I solved a lot of technology difficulties > (uploading pictures, resizing pictures, pictures stored in Mysql, > characterset conversion, a simple spiderbot, a simple templating system > etc. > > MP beats a lot of other similar tools but in my eyes there is a lack of > proper simple to understand examples for so called newbie's that are > well documented > > Martijn Moeling > > -----Oorspronkelijk bericht----- > Van: mod_python-bounces at modpython.org > [mailto:mod_python-bounces at modpython.org] Namens Mike Looijmans > Verzonden: Wednesday, March 28, 2007 12:02 PM > Aan: mod_python at modpython.org > Onderwerp: Re: [mod_python] how to use Mysql on mod_python+apache? > > This thread is going way of topic, but I'd really hate to see people > being turned away from MySQL as > a DB engine just because of the inaccuracies posted here. > > I have several years of experience with many DBMSs, including Informix, > Oracle, MS SQLServer, > Postgress, MySQL and several others. MySQL is my favorite for (non-.NET) > web applications, because > of its scalability, performance, reliability, low maintenance and ease > of use. > > There are many DBMSs, each with their own pecularities, and none of them > I would consider "bad" (or > even "evil"). Which DBMS to chose for a particular task seems to become > a matter of personal taste > more everyday, because the more general offerings, like the ones I > mentioned, all provide the same > rich feature set (e.g. transactions, subqueries, stored procedures, > outer joins). While I would not > hesitate to recommend in favor of some of the databases I am familiar > with, there is not one that i > would ever tell people to "avoid at all cost". Even FoxPro has its uses. > > > Sorry, but accepting invalid input without error, truncating overly > long > > input and clipping overflowed numbers are not "quirks". > > I agree so far. > > > They are serious data integrity issues. > > I disagree here, because the issues you mentioned are configuration > settings in MySQL. You can > change the behaviour of the server in the config file. It is unfortunate > that the default settings > are not the ANSI ones. But you can make the MySQL DB comply to the more > general standard of issuing > an error on overflow and other forms of invalid input. > > I suggest reading some documentation before proceeding on the subject. > > > That's fine. At least you aren't really using MySQL in production :-) > > I have. On my previous assignment, the customer would loose about $10k > per hour in lost machine time > only (not even taking the engineers cost into account) if the MySQL > database went offline. It did go > offline once in that three year period i worked there - the power went > down, the UPS failed and the > operating system (Solaris) died a horrible dead along with the hard > drive. When the power came up, I > had its replacement up and running in about ten minutes, and no data was > lost. > > > -- > Mike Looijmans > > _______________________________________________ > Mod_python mailing list > Mod_python at modpython.org > http://mailman.modpython.org/mailman/listinfo/mod_python > > > > ------------------------------ > > Message: 5 > Date: Thu, 29 Mar 2007 14:04:48 +0200 > From: Mark <mctse at vodamail.co.za> > Subject: [mod_python] Textbooks on psp programming? > To: Graham Dumpleton <graham.dumpleton at gmail.com>, > Mod_python at modpython.org > Message-ID: <460BAB60.7090107 at vodamail.co.za> > Content-Type: text/plain; charset=ISO-8859-1 > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Dear mod_python guru. > > I taught myself how to program with php and would love to learn how to > use mod_python. I learned php from an excellent book called php4 for > beginners (after all that's exactly what I was - and am as regards > python -) and would greatly appreciate it if you could refer me to an > equivalent book on psp programming. > > > Kindest regards > > > > Mark Coetsee > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.7 (MingW32) > > iD8DBQFGC6tgLzNh63IR8ssRArusAJ9T9THiyvbu8ZiJtCKuejD+SiiQLQCgm3uG > RlvXnPYgO94PtrCmvus07VI= > =V/8D > -----END PGP SIGNATURE----- > > > > ------------------------------ > > Message: 6 > Date: Thu, 29 Mar 2007 14:12:11 +0200 > From: "Martijn Moeling" <martijn at xs4us.nu> > Subject: RE: [mod_python] session variable value (partially) > dissapearing > To: "Jim Gallacher" <jpg at jgassociates.ca>, "Detmar Meurers" > <dm at ling.ohio-state.edu> > Cc: mod_python at modpython.org, Graham Dumpleton > <graham.dumpleton at gmail.com> > Message-ID: > <B6C73A5E30565245BB6D32B5F5DF7A52120334 at sense.emmastraat.pijnacker> > Content-Type: text/plain; charset="US-ASCII" > > Are you properly saving the session at every request? > Like: > > # Created session like this: > # req.session = Session.Session(req) > > Req.session.save() > > Martijn > > -----Oorspronkelijk bericht----- > Van: mod_python-bounces at modpython.org > [mailto:mod_python-bounces at modpython.org] Namens Jim Gallacher > Verzonden: Wednesday, March 28, 2007 3:00 AM > Aan: Detmar Meurers > CC: mod_python at modpython.org; Graham Dumpleton > Onderwerp: Re: [mod_python] session variable value (partially) > dissapearing > > Detmar Meurers wrote: > > Hi Graham, > > > > Thanks for the very quick reply. > > > > The page showing the problem actually is using the publisher handler > > (so no special exception handling etc.) > > > > I tried the FileSession and the problem occurs there too - and I'm > > not doing any calling of unlock(). > > > > I am calling req.session.save() - one question about that though: > > Can it possibly cause problems when calling the save() several times > > when handling one request? > > It shouldn't matter. The session store is locked so only one request can > > read or write at a time. This is the case even if you have session > locking turned off, or unlock the session manually. > > Jim > _______________________________________________ > Mod_python mailing list > Mod_python at modpython.org > http://mailman.modpython.org/mailman/listinfo/mod_python > > > > ------------------------------ > > _______________________________________________ > Mod_python mailing list > Mod_python at modpython.org > http://mailman.modpython.org/mailman/listinfo/mod_python > > > End of Mod_python Digest, Vol 48, Issue 37 > ****************************************** >
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