[web2py] Re: Is there a way to cache images from "download" function?
Hi I tried this from the book, but got an error: @cache.action(time_expire=874, cache_model=cache.ram, session=True, vars=True, public=True) So i tried the ideas in this post and they had miscellaneous errors. I thought things have probably changed since 2014. Then i started removing parameters from the book's suggestion and found that if I didn't include 'cache_model=cache.ram' it worked and set the expire time as i expected. So i am happy. But I'm not sure if i should be happy because i know so little about caching that maybe leaving that parameter out is bad. Anyhow, thought this might be helpful to someone else who knows as little about this as I do :) On Wednesday, 29 January 2014 at 18:20:21 UTC+10 Niphlod wrote: > server-side it doesn't make any sense, so there's no native way to do it. > It's not going to be faster than serving a static-file. > > > On Wednesday, January 29, 2014 12:53:00 AM UTC+1, James Burke wrote: >> >> I'm exploring options. >> >> I want to be able to cache my images. Client side, server side it doesn't >> matter. >> >> What is the best method to go about this? >> >> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/web2py/2092b4d5-b7be-48ce-b44a-522895b299f9n%40googlegroups.com.
[web2py] Re: Is there a way to cache images from download function?
server-side it doesn't make any sense, so there's no native way to do it. It's not going to be faster than serving a static-file. On Wednesday, January 29, 2014 12:53:00 AM UTC+1, James Burke wrote: I'm exploring options. I want to be able to cache my images. Client side, server side it doesn't matter. What is the best method to go about this? -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
lots and lots of time passed under the bridge. Now there's cache.action ... -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
Ok I tried: @cache.action(time_expire=1200, cache_model=cache.memcache, quick='SVL') def fast_download(): import time, os import contenttype as c # very basic security: if not request.args(0).startswith(file.file): return download() file_id = request.args(-1) myfile = db.file(db.file.file==file_id) filename, file = db.file.file.retrieve(myfile.file) response.headers[Content-Type] = c.contenttype(file_id) response.headers[Content-Disposition] = attachment; filename=%s %filename #response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y %H:%M:%S +, time.localtime(myfile.last_modified)) stream = response.stream(file, chunk_size=64*1024, request=request) raise HTTP(200, stream, **response.headers) Now I'm getting an error: PicklingError: Can't pickle type 'generator': attribute lookup __builtin__.generator failed Is there a way to response.render the download? On Wednesday, January 29, 2014 2:30:37 AM UTC+13, Niphlod wrote: lots and lots of time passed under the bridge. Now there's cache.action ... -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
wasn't the original point just to add the proper headers ? Of course you can't cache a generator (that is what response.stream returns) It makes no sense at all to store the actual contents of the file on memcache On Tuesday, January 28, 2014 7:46:18 PM UTC+1, James Burke wrote: Ok I tried: @cache.action(time_expire=1200, cache_model=cache.memcache, quick='SVL') def fast_download(): import time, os import contenttype as c # very basic security: if not request.args(0).startswith(file.file): return download() file_id = request.args(-1) myfile = db.file(db.file.file==file_id) filename, file = db.file.file.retrieve(myfile.file) response.headers[Content-Type] = c.contenttype(file_id) response.headers[Content-Disposition] = attachment; filename=%s %filename #response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y %H:%M:%S +, time.localtime(myfile.last_modified)) stream = response.stream(file, chunk_size=64*1024, request=request) raise HTTP(200, stream, **response.headers) Now I'm getting an error: PicklingError: Can't pickle type 'generator': attribute lookup __builtin__.generator failed Is there a way to response.render the download? On Wednesday, January 29, 2014 2:30:37 AM UTC+13, Niphlod wrote: lots and lots of time passed under the bridge. Now there's cache.action ... -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
I'm exploring options. I want to be able to cache my images. Client side, server side it doesn't matter. What is the best method to go about this? -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
probably you're not running a recent web2py release. On Saturday, January 25, 2014 9:37:12 PM UTC+1, James Burke wrote: def fast_download(): import time, os import contenttype as c cache.client(time_expire=604800, quick='SVL')(lambda: 0)() file_id = request.args(-1) myfile = db.file(db.file.file==file_id) filename, file = db.file.file.retrieve(myfile.file) response.headers[Content-Type] = c.contenttype(file_id) response.headers[Content-Disposition] = attachment; filename=%s %filename stream = response.stream(file, chunk_size=64*1024, request=request) raise HTTP(200, stream, **response.headers) I tried using the above code, but results in the follow error message: cache.client(time_expire=604800, quick='SVL')(lambda: 0)() AttributeError: 'Cache' object has no attribute 'client' Am I missing something? Cheers -James On Monday, April 15, 2013 1:21:18 AM UTC+12, Niphlod wrote: ok. So, basically the problem is that response.stream is a special kind of function. It raises HTTP(200, content_of_the_file) instead of returning it, and raising an HTTP(200) is a smart way to do it. Unfortunately, this means that def download(): return response.stream() basically doesn't return from download, it raises an exception inside response.stream and the execution is cutted of right in the response.stream function. A decorator outside download() doesn't work, because it doesn't have the chance to execute that function completely. Now, on the bright side, the download() function should be the only one behaving in this way, so the cache.client implementation shouldn't change. I'll see if we can use a public function just to adjust headers beforehand without requiring for the actual function. For the time being, this works ok. def download(): cache.client(time_expire=604800, quick='SVL')(lambda: 0)() allows downloading of uploaded files http:///[app]/default/download/[filename] return response.download(request, db) basically because cache.client is coded to be a decorator, you have to pass it a function. In this case, a dummy lambda:0 is passed. To fire the actual calculations of the cache decorator, you have to call it (and that's why there's an empty () at the end). The headers are then manipulated in the current response, so response.download pick it up where headers are already set, and when it returns the image, the headers are shipped with the response. If you have any doubts, please ask. -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
Version 2.7.4-stable+timestamp.2013.10.14.15.16.29 recent enough? It's after your original post. On Tuesday, January 28, 2014 2:49:52 AM UTC+13, Niphlod wrote: probably you're not running a recent web2py release. On Saturday, January 25, 2014 9:37:12 PM UTC+1, James Burke wrote: def fast_download(): import time, os import contenttype as c cache.client(time_expire=604800, quick='SVL')(lambda: 0)() file_id = request.args(-1) myfile = db.file(db.file.file==file_id) filename, file = db.file.file.retrieve(myfile.file) response.headers[Content-Type] = c.contenttype(file_id) response.headers[Content-Disposition] = attachment; filename=%s %filename stream = response.stream(file, chunk_size=64*1024, request=request) raise HTTP(200, stream, **response.headers) I tried using the above code, but results in the follow error message: cache.client(time_expire=604800, quick='SVL')(lambda: 0)() AttributeError: 'Cache' object has no attribute 'client' Am I missing something? Cheers -James On Monday, April 15, 2013 1:21:18 AM UTC+12, Niphlod wrote: ok. So, basically the problem is that response.stream is a special kind of function. It raises HTTP(200, content_of_the_file) instead of returning it, and raising an HTTP(200) is a smart way to do it. Unfortunately, this means that def download(): return response.stream() basically doesn't return from download, it raises an exception inside response.stream and the execution is cutted of right in the response.stream function. A decorator outside download() doesn't work, because it doesn't have the chance to execute that function completely. Now, on the bright side, the download() function should be the only one behaving in this way, so the cache.client implementation shouldn't change. I'll see if we can use a public function just to adjust headers beforehand without requiring for the actual function. For the time being, this works ok. def download(): cache.client(time_expire=604800, quick='SVL')(lambda: 0)() allows downloading of uploaded files http:///[app]/default/download/[filename] return response.download(request, db) basically because cache.client is coded to be a decorator, you have to pass it a function. In this case, a dummy lambda:0 is passed. To fire the actual calculations of the cache decorator, you have to call it (and that's why there's an empty () at the end). The headers are then manipulated in the current response, so response.download pick it up where headers are already set, and when it returns the image, the headers are shipped with the response. If you have any doubts, please ask. -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
I tried using the above code, but results in the follow error message: cache.client(time_expire=604800, quick='SVL')(lambda: 0)() AttributeError: 'Cache' object has no attribute 'client' Am I missing something? Cheers -James On Monday, April 15, 2013 1:21:18 AM UTC+12, Niphlod wrote: ok. So, basically the problem is that response.stream is a special kind of function. It raises HTTP(200, content_of_the_file) instead of returning it, and raising an HTTP(200) is a smart way to do it. Unfortunately, this means that def download(): return response.stream() basically doesn't return from download, it raises an exception inside response.stream and the execution is cutted of right in the response.stream function. A decorator outside download() doesn't work, because it doesn't have the chance to execute that function completely. Now, on the bright side, the download() function should be the only one behaving in this way, so the cache.client implementation shouldn't change. I'll see if we can use a public function just to adjust headers beforehand without requiring for the actual function. For the time being, this works ok. def download(): cache.client(time_expire=604800, quick='SVL')(lambda: 0)() allows downloading of uploaded files http:///[app]/default/download/[filename] return response.download(request, db) basically because cache.client is coded to be a decorator, you have to pass it a function. In this case, a dummy lambda:0 is passed. To fire the actual calculations of the cache decorator, you have to call it (and that's why there's an empty () at the end). The headers are then manipulated in the current response, so response.download pick it up where headers are already set, and when it returns the image, the headers are shipped with the response. If you have any doubts, please ask. -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
So I changed my function to this: #7days @cache.client(time_expire=604800, quick='SVL') def fast_download(): session.forget(response) # very basic security (only allow fast_download on your_table.upload_field): if not request.args(0).startswith(db.Images): return download() # remove/add headers that prevent/favors client-side caching #del response.headers['Cache-Control'] #del response.headers['Pragma'] #del response.headers['Expires'] filename = os.path.join(request.folder,'uploads',request.args(0)) #response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y %H:%M:%S +, time.localtime(os.path.getmtime(filename))) return response.stream(open(filename,'rb')) developers.google.com/speed/pagespeed/ still says I should enable caching for those pictures. any idea why its not working? -- --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
sorry for the misguidance unfortunately response.stream doesn't return , it raises HTTP() so basically the cache decorator hasn't the possibility of completing. I'm looking into it right now. -- --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
ok. So, basically the problem is that response.stream is a special kind of function. It raises HTTP(200, content_of_the_file) instead of returning it, and raising an HTTP(200) is a smart way to do it. Unfortunately, this means that def download(): return response.stream() basically doesn't return from download, it raises an exception inside response.stream and the execution is cutted of right in the response.stream function. A decorator outside download() doesn't work, because it doesn't have the chance to execute that function completely. Now, on the bright side, the download() function should be the only one behaving in this way, so the cache.client implementation shouldn't change. I'll see if we can use a public function just to adjust headers beforehand without requiring for the actual function. For the time being, this works ok. def download(): cache.client(time_expire=604800, quick='SVL')(lambda: 0)() allows downloading of uploaded files http:///[app]/default/download/[filename] return response.download(request, db) basically because cache.client is coded to be a decorator, you have to pass it a function. In this case, a dummy lambda:0 is passed. To fire the actual calculations of the cache decorator, you have to call it (and that's why there's an empty () at the end). The headers are then manipulated in the current response, so response.download pick it up where headers are already set, and when it returns the image, the headers are shipped with the response. If you have any doubts, please ask. -- --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
It works like a charm. I used the stream function and that works too. #7days def fast_download(): session.forget(response) cache.client(time_expire=604800)(lambda: 0)() # very basic security (only allow fast_download on your_table.upload_field): if not request.args(0).startswith(db.Images): return download() filename = os.path.join(request.folder,'uploads',request.args(0)) return response.stream(open(filename,'rb')) thanks Niphlod you are awesome. On Sunday, April 14, 2013 3:21:18 PM UTC+2, Niphlod wrote: ok. So, basically the problem is that response.stream is a special kind of function. It raises HTTP(200, content_of_the_file) instead of returning it, and raising an HTTP(200) is a smart way to do it. Unfortunately, this means that def download(): return response.stream() basically doesn't return from download, it raises an exception inside response.stream and the execution is cutted of right in the response.stream function. A decorator outside download() doesn't work, because it doesn't have the chance to execute that function completely. Now, on the bright side, the download() function should be the only one behaving in this way, so the cache.client implementation shouldn't change. I'll see if we can use a public function just to adjust headers beforehand without requiring for the actual function. For the time being, this works ok. def download(): cache.client(time_expire=604800, quick='SVL')(lambda: 0)() allows downloading of uploaded files http:///[app]/default/download/[filename] return response.download(request, db) basically because cache.client is coded to be a decorator, you have to pass it a function. In this case, a dummy lambda:0 is passed. To fire the actual calculations of the cache decorator, you have to call it (and that's why there's an empty () at the end). The headers are then manipulated in the current response, so response.download pick it up where headers are already set, and when it returns the image, the headers are shipped with the response. If you have any doubts, please ask. -- --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
There supposedly is a way the fast download function(web2pyslices) def fast_download(): # very basic security (only allow fast_download on your_table.upload_field): if not request.args(0).startswith(db.your_table.your_field): return download() # remove/add headers that prevent/favors client-side caching #7days response.headers['Cache-Control'] = max-age=604800 del response.headers['Pragma'] del response.headers['Expires'] filename = os.path.join(request.folder,'uploads',request.args(0)) # send last modified date/time so client browser can enable client-side caching response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y %H:%M:%S +, time.localtime(os.path.getmtime(filename))) return response.stream(open(filename,'rb')) this is the version I'm experimenting with. the original had a del Cache Control instead of the max age. but google pagespeed still tells me that no expiration date is set. On Saturday, April 6, 2013 4:42:45 AM UTC+2, Tito Garrido wrote: Hi! I was running page speed on my website and all image files from the database (upload folder) are not cached... Is there a way to enable cache for them? Thanks! Tito -- Linux User #387870 . _/_õ|__| ..º[ .-.___.-._| . . . . .__( o)__( o).:___ -- --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
there's a new @cache.client decorator to set expire headers in an easy way as soon as the book gets updated the docs will be here http://web2py.com/books/default/chapter/29/04#cache On Saturday, April 6, 2013 11:58:17 AM UTC+2, BlueShadow wrote: There supposedly is a way the fast download function(web2pyslices) def fast_download(): # very basic security (only allow fast_download on your_table.upload_field): if not request.args(0).startswith(db.your_table.your_field): return download() # remove/add headers that prevent/favors client-side caching #7days response.headers['Cache-Control'] = max-age=604800 del response.headers['Pragma'] del response.headers['Expires'] filename = os.path.join(request.folder,'uploads',request.args(0)) # send last modified date/time so client browser can enable client-side caching response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y %H:%M:%S +, time.localtime(os.path.getmtime(filename))) return response.stream(open(filename,'rb')) this is the version I'm experimenting with. the original had a del Cache Control instead of the max age. but google pagespeed still tells me that no expiration date is set. On Saturday, April 6, 2013 4:42:45 AM UTC+2, Tito Garrido wrote: Hi! I was running page speed on my website and all image files from the database (upload folder) are not cached... Is there a way to enable cache for them? Thanks! Tito -- Linux User #387870 . _/_õ|__| ..º[ .-.___.-._| . . . . .__( o)__( o).:___ -- --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
Does that work for download? Download returns a stream not a string. On Saturday, 6 April 2013 06:48:55 UTC-5, Niphlod wrote: there's a new @cache.client decorator to set expire headers in an easy way as soon as the book gets updated the docs will be here http://web2py.com/books/default/chapter/29/04#cache On Saturday, April 6, 2013 11:58:17 AM UTC+2, BlueShadow wrote: There supposedly is a way the fast download function(web2pyslices) def fast_download(): # very basic security (only allow fast_download on your_table.upload_field): if not request.args(0).startswith(db.your_table.your_field): return download() # remove/add headers that prevent/favors client-side caching #7days response.headers['Cache-Control'] = max-age=604800 del response.headers['Pragma'] del response.headers['Expires'] filename = os.path.join(request.folder,'uploads',request.args(0)) # send last modified date/time so client browser can enable client-side caching response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y %H:%M:%S +, time.localtime(os.path.getmtime(filename))) return response.stream(open(filename,'rb')) this is the version I'm experimenting with. the original had a del Cache Control instead of the max age. but google pagespeed still tells me that no expiration date is set. On Saturday, April 6, 2013 4:42:45 AM UTC+2, Tito Garrido wrote: Hi! I was running page speed on my website and all image files from the database (upload folder) are not cached... Is there a way to enable cache for them? Thanks! Tito -- Linux User #387870 . _/_õ|__| ..º[ .-.___.-._| . . . . .__( o)__( o).:___ -- --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: Is there a way to cache images from download function?
cache.client (when no cache_model is passed) just sets headers (that's the idea at the bottom). When you pass a cache_model, it sets headers AND cache the results (and that's the idea at the top). cache.client was created in the first place to avoid having to set headers repeatedly. There's no improvement to look for caching the results of a download() ^_^ On Saturday, April 6, 2013 3:23:22 PM UTC+2, Massimo Di Pierro wrote: Does that work for download? Download returns a stream not a string. On Saturday, 6 April 2013 06:48:55 UTC-5, Niphlod wrote: there's a new @cache.client decorator to set expire headers in an easy way as soon as the book gets updated the docs will be here http://web2py.com/books/default/chapter/29/04#cache On Saturday, April 6, 2013 11:58:17 AM UTC+2, BlueShadow wrote: There supposedly is a way the fast download function(web2pyslices) def fast_download(): # very basic security (only allow fast_download on your_table.upload_field): if not request.args(0).startswith(db.your_table.your_field): return download() # remove/add headers that prevent/favors client-side caching #7days response.headers['Cache-Control'] = max-age=604800 del response.headers['Pragma'] del response.headers['Expires'] filename = os.path.join(request.folder,'uploads',request.args(0)) # send last modified date/time so client browser can enable client-side caching response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y %H:%M:%S +, time.localtime(os.path.getmtime(filename))) return response.stream(open(filename,'rb')) this is the version I'm experimenting with. the original had a del Cache Control instead of the max age. but google pagespeed still tells me that no expiration date is set. On Saturday, April 6, 2013 4:42:45 AM UTC+2, Tito Garrido wrote: Hi! I was running page speed on my website and all image files from the database (upload folder) are not cached... Is there a way to enable cache for them? Thanks! Tito -- Linux User #387870 . _/_õ|__| ..º[ .-.___.-._| . . . . .__( o)__( o).:___ -- --- You received this message because you are subscribed to the Google Groups web2py-users group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [web2py] Re: Is there a way to cache images from download function?
Hi Folks!
Thanks for your answers but my implementation is a little bit different so
none of the solutions above worked, I have tried to adapt the slice
solution but it didn't work also, here is my download function, I am
using the name of the files instead of the hash name (I am also using
upload separated = True:
def images():
''' get the image using its name
param1 = table
param2 = type (image,thumb,minithumb,logo,banner)
param3 = name '''
import os,time
tabela = request.args(0)
tipo = request.args(1)
nome_imagem = request.args(2)
if tabela == 'artista':
row = db.artista(image_filename=nome_imagem)
image=row[tipo]
elif tabela == 'personagem':
row = db.personagem(image_filename=nome_imagem)
image=row[tipo]
elif tabela == 'novela':
if tipo == 'logo':
row = db.novela(logo_filename=nome_imagem)
elif tipo == 'banner':
row = db.novela(banner_filename=nome_imagem)
image=row[tipo]
if not image:
raise HTTP(404)
else:
request.args.append(image)
response.headers['Cache-Control'] = max-age=604800 *# it is still
showing Cache-Control=0*
#del response.headers['Pragma'] *# error, Pragma key not available*
#del response.headers['Expires'] *# error, Expires key not available*
splits = image.split('.')
path = splits[0] + '.' + splits[1] + '/' + splits[2][:2] + '/'
global_path = path + image
filename = os.path.join(request.folder,'uploads',global_path)
# send last modified date/time so client browser can enable client-side
caching
response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y
%H:%M:%S +, time.localtime(os.path.getmtime(filename)))
return response.download(request,db)
I am pretty syre that I am missing something here... using @cache-client
raised an argument missing error, 0 given 1 expected...
How can I change my function to works with cache?
Thanks!
Tito
On Sat, Apr 6, 2013 at 11:19 AM, Niphlod niph...@gmail.com wrote:
cache.client (when no cache_model is passed) just sets headers (that's the
idea at the bottom).
When you pass a cache_model, it sets headers AND cache the results (and
that's the idea at the top).
cache.client was created in the first place to avoid having to set headers
repeatedly.
There's no improvement to look for caching the results of a download()
^_^
On Saturday, April 6, 2013 3:23:22 PM UTC+2, Massimo Di Pierro wrote:
Does that work for download? Download returns a stream not a string.
On Saturday, 6 April 2013 06:48:55 UTC-5, Niphlod wrote:
there's a new @cache.client decorator to set expire headers in an easy
way
as soon as the book gets updated the docs will be here
http://web2py.com/books/**default/chapter/29/04#cachehttp://web2py.com/books/default/chapter/29/04#cache
On Saturday, April 6, 2013 11:58:17 AM UTC+2, BlueShadow wrote:
There supposedly is a way the fast download function(web2pyslices)
def fast_download():
# very basic security (only allow fast_download on
your_table.upload_field):
if not request.args(0).startswith(**db.your_table.your_field):
return download()
# remove/add headers that prevent/favors client-side caching
#7days
response.headers['Cache-**Control'] = max-age=604800
del response.headers['Pragma']
del response.headers['Expires']
filename = os.path.join(request.folder,'**uploads',request.args(0))
# send last modified date/time so client browser can enable
client-side caching
response.headers['Last-**Modified'] = time.strftime(%a, %d %b %Y
%H:%M:%S +, time.localtime(os.path.getmtim**e(filename)))
return response.stream(open(filename,**'rb'))
this is the version I'm experimenting with. the original had a del
Cache Control instead of the max age. but google pagespeed still tells me
that no expiration date is set.
On Saturday, April 6, 2013 4:42:45 AM UTC+2, Tito Garrido wrote:
Hi!
I was running page speed on my website and all image files from the
database (upload folder) are not cached...
Is there a way to enable cache for them?
Thanks!
Tito
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Re: [web2py] Re: Is there a way to cache images from download function?
Now it works! I just changed the return function to return
response.stream(open(filename,'rb')) :D
Thanks folks!
PS: How to use @client-cache? :)
Regards,
Tito
On Sat, Apr 6, 2013 at 1:36 PM, Tito Garrido titogarr...@gmail.com wrote:
Hi Folks!
Thanks for your answers but my implementation is a little bit different so
none of the solutions above worked, I have tried to adapt the slice
solution but it didn't work also, here is my download function, I am
using the name of the files instead of the hash name (I am also using
upload separated = True:
def images():
''' get the image using its name
param1 = table
param2 = type (image,thumb,minithumb,logo,banner)
param3 = name '''
import os,time
tabela = request.args(0)
tipo = request.args(1)
nome_imagem = request.args(2)
if tabela == 'artista':
row = db.artista(image_filename=nome_imagem)
image=row[tipo]
elif tabela == 'personagem':
row = db.personagem(image_filename=nome_imagem)
image=row[tipo]
elif tabela == 'novela':
if tipo == 'logo':
row = db.novela(logo_filename=nome_imagem)
elif tipo == 'banner':
row = db.novela(banner_filename=nome_imagem)
image=row[tipo]
if not image:
raise HTTP(404)
else:
request.args.append(image)
response.headers['Cache-Control'] = max-age=604800 *# it is still
showing Cache-Control=0*
#del response.headers['Pragma'] *# error, Pragma key not available*
#del response.headers['Expires'] *# error, Expires key not available*
splits = image.split('.')
path = splits[0] + '.' + splits[1] + '/' + splits[2][:2] + '/'
global_path = path + image
filename = os.path.join(request.folder,'uploads',global_path)
# send last modified date/time so client browser can enable
client-side caching
response.headers['Last-Modified'] = time.strftime(%a, %d %b %Y
%H:%M:%S +, time.localtime(os.path.getmtime(filename)))
return response.download(request,db)
I am pretty syre that I am missing something here... using @cache-client
raised an argument missing error, 0 given 1 expected...
How can I change my function to works with cache?
Thanks!
Tito
On Sat, Apr 6, 2013 at 11:19 AM, Niphlod niph...@gmail.com wrote:
cache.client (when no cache_model is passed) just sets headers (that's
the idea at the bottom).
When you pass a cache_model, it sets headers AND cache the results (and
that's the idea at the top).
cache.client was created in the first place to avoid having to set
headers repeatedly.
There's no improvement to look for caching the results of a download()
^_^
On Saturday, April 6, 2013 3:23:22 PM UTC+2, Massimo Di Pierro wrote:
Does that work for download? Download returns a stream not a string.
On Saturday, 6 April 2013 06:48:55 UTC-5, Niphlod wrote:
there's a new @cache.client decorator to set expire headers in an easy
way
as soon as the book gets updated the docs will be here
http://web2py.com/books/**default/chapter/29/04#cachehttp://web2py.com/books/default/chapter/29/04#cache
On Saturday, April 6, 2013 11:58:17 AM UTC+2, BlueShadow wrote:
There supposedly is a way the fast download function(web2pyslices)
def fast_download():
# very basic security (only allow fast_download on
your_table.upload_field):
if not request.args(0).startswith(**db.your_table.your_field):
return download()
# remove/add headers that prevent/favors client-side caching
#7days
response.headers['Cache-**Control'] = max-age=604800
del response.headers['Pragma']
del response.headers['Expires']
filename = os.path.join(request.folder,'**uploads',request.args(0))
# send last modified date/time so client browser can enable
client-side caching
response.headers['Last-**Modified'] = time.strftime(%a, %d %b %Y
%H:%M:%S +, time.localtime(os.path.getmtim**e(filename)))
return response.stream(open(filename,**'rb'))
this is the version I'm experimenting with. the original had a del
Cache Control instead of the max age. but google pagespeed still tells me
that no expiration date is set.
On Saturday, April 6, 2013 4:42:45 AM UTC+2, Tito Garrido wrote:
Hi!
I was running page speed on my website and all image files from the
database (upload folder) are not cached...
Is there a way to enable cache for them?
Thanks!
Tito
--
Linux User #387870
.
_/_õ|__|
..º[ .-.___.-._| . . . .
.__( o)__( o).:___
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.
_/_õ|__|
..º[ .-.___.-._| . . . .
.__( o)__( o).:___
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