Re: Determining a valid URL
- To: mathgroup at smc.vnet.net
- Subject: [mg112755] Re: Determining a valid URL
- From: Simon <simonjtyler at gmail.com>
- Date: Wed, 29 Sep 2010 04:15:01 -0400 (EDT)
- References: <i7sekf$pmh$1@smc.vnet.net>
Maybe this thread http://groups.google.com.au/group/comp.soft-sys.math.mathematica/browse_thread/thread/ecfa0b05cf9e5157/ could be useful? Simon On Sep 28, 8:05 pm, Mark Coleman <markspcole... at gmail.com> wrote: > Greetings, > > I am exploring the use of Mathematica (v7) to import information from web > sites. One step in my procedure is to validate that a given web > address is valid. One simple way that seems to work most of the time > is to use the Import["my url"] command. An invalid web site (e.g., > mispelled URL, etc) returns a $Failed. But I've found instances where > valid web sites also return a $Failed if I issue the Import command > with no argument. For these sites, Import seems to work if I use > "Source". > > I'm trying to understand this behavior better, so I can write a more > general URL checker (note: I am seeking to extract "Plaintext" from > these sites, and using "Plaintext" as the second argument in the > Import statement also yields a $Failed!) > > Best, > > Mark