Re: Import files on accessible URL and save in
- To: mathgroup at smc.vnet.net
- Subject: [mg122765] Re: Import files on accessible URL and save in
- From: DrMajorBob <btreat1 at austin.rr.com>
- Date: Thu, 10 Nov 2011 06:51:06 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201111050945.EAA10302@smc.vnet.net>
- Reply-to: drmajorbob at yahoo.com
I'm using Mac, not Windows. I can't see the file (or files) downloaded, can't delete them, and can't imagine why THAT would be the default location. Bobby On Wed, 09 Nov 2011 09:59:29 -0600, Patrick Scheibe <pscheibe at trm.uni-leipzig.de> wrote: > Hi, > > I have written a small application which uses FetchURL to download and > install a Mathematica-package of mine from within Mathematica and > without external tools like wget, tar, .. > > There, I came across this behaviour too. On windows, and only on > windows, I was not able to remove my temporary "package installer" > although I closed every used file. > > When I remeber right, I could remove it *after* killing the kernel which > is a bit useless if you want to download, install and remove temp. stuff > in one function call and leave the user with a fresh installed new > package. > > Cheers > Patrick > > On Wed, 2011-11-09 at 06:24 -0500, Todd Gayley wrote: >> At 04:24 PM 11/8/2011, DrMajorBob wrote: >> >This fails, and I wonder why? >> > >> >DeleteDirectory["/private/var/folders/kY", DeleteContents -> True] >> > >> >$Failed >> > >> >DeleteDirectory::dirne: Directory /private/var/folders/kY not empty. >> >> >> >> I would guess it is because other processes have files open in that >> directory. Why are you trying to delete an entire directory (two >> levels up, no less), when FetchURL just created one file? >> >> As for your question about documentation, Utilities`URLTools`FetchURL >> is not an officially documented part of the system, which could be >> for a number of reasons. However, it has been a stable part of >> Mathematica for long enough (it is used internally by Import) that I >> am comfortable recommending it to users who need its functionality. >> >> >> Todd Gayley >> Wolfram Research >> >> >> >On Tue, 08 Nov 2011 16:08:46 -0600, DrMajorBob <btreat1 at austin.rr.com> >> >wrote: >> > >> >><<Utilities`URLTools` >> >>FetchURL["http://www.wolfram.com";] >> >>"/private/var/folders/kY/kYL-hxebGaefEKwlddWc3++++TM/-Tmp-/Temp7483389857745393361___www.wolfram.com" >> >> >> >>Good job! Now, then... where is that file, and how do I remove it? >> >> >> >>Bobby >> >> >> >>On Tue, 08 Nov 2011 06:14:50 -0600, Todd Gayley <tgayley at wolfram.com> >> >>wrote: >> >> >> >>>At 03:45 AM 11/5/2011, Gy Peng wrote: >> >>>>Dear Mathematica friends, >> >>>> >> >>>>I want to Import some files stored on internet by: >> >>>> >> >>>>Import["http://url";, ...] >> >>>> >> >>>>This allow me to see the file in the notebook of mathematica. >> However, >> >>>>what >> >>>>I want to do is to download and save the files in local machine. And >> >>>>since >> >>>>I have may be hundreds or thousands files need to be download and >> >>>>save. Is >> >>>>there any why in Mathematica to do it in a most optimized and fast >> way? >> >>>> >> >>>>And can read the file names in a single string in Mathematica like: >> >>>> >> >>>>{ file1, file2, file3, file4, ...} >> >>>> >> >>>>How could I make a loop in Mathematica to download and save all of >> >>>>them in a same directory in local machine by Mathematica? >> >>>> >> >>>>I would thank you for all your kind reply and help!!!! >> >>> >> >>> >> >>>The FetchURL function, which is used internally by Import, will do >> >>>what you want: >> >>> >> >>> In[10]:= << Utilities`URLTools` >> >>> >> >>> In[11]:= FetchURL["http://www.wolfram.com";] >> >>> >> >>> Out[11]= >> >>>"C:\\Users\\tgayley\\AppData\\Local\\Temp\\Temp65400___www.wolfram.com" >> >>> >> >>>If you want to choose a specific location and filename for the >> >>>downloaded file, you pass it as the second argument: >> >>> >> >>> In[12]:= FetchURL["http://www.wolfram.com";, "c:\\foo.txt"] >> >>> >> >>> Out[12]= "c:\\foo.txt" >> >>> >> >>>If you want a program that downloads a list of URLs to a specific >> >>>directory, this will do the trick. >> >>> >> >>> listOfURLs = {"http://www.wolfram.com";, "http://www.apple.com";, >> >>>"http://www.microsoft.com"}; >> >>> downloadDir = "c:\\foo"; (* I assume it exists *) >> >>> n = 1; >> >>> {#, FetchURL[#, ToFileName[downloadDir, "file" <> >> >>>ToString[n++]]]} & /@ listOfURLs >> >>> >> >>>This returns a list of {url, filename} pairs so you can match up each >> >>>URL with the corresponding file. You could also create filenames >> >>>based on the URL so that it was immediately obvious which file was >> >>>the product of which URL. >> >>> >> >>> >> >>>Todd Gayley >> >>>Wolfram Research >> >>> >> >> >> > >> > >> >-- >> >DrMajorBob at yahoo.com >> >> > > -- DrMajorBob at yahoo.com
- References:
- Import files on accessible URL and save in local machine.
- From: Gy Peng <hitphyopt@gmail.com>
- Import files on accessible URL and save in local machine.