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Re: Import files on accessible URL and save in

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122733] Re: Import files on accessible URL and save in
  • From: DrMajorBob <btreat1 at austin.rr.com>
  • Date: Wed, 9 Nov 2011 06:23:06 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <201111050945.EAA10302@smc.vnet.net>
  • Reply-to: drmajorbob at yahoo.com

This fails, and I wonder why?

DeleteDirectory["/private/var/folders/kY", DeleteContents -> True]

$Failed

DeleteDirectory::dirne: Directory /private/var/folders/kY not empty. >>

Bobby

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



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