-p
--page-requisites
This option causes Wget to download all the files that are neces-
sary to properly display a given HTML page. This includes such
things as inlined images, sounds, and referenced stylesheets.
Ordinarily, when downloading a single HTML page, any requisite doc-
uments that may be needed to display it properly are not down-
loaded. Using -r together with -l can help, but since Wget does
not ordinarily distinguish between external and inlined documents,
one is generally left with ``leaf documents'' that are missing
their requisites.
For instance, say document 1.html contains an "<IMG>" tag referenc-
ing 1.gif and an "<A>" tag pointing to external document 2.html.
Say that 2.html is similar but that its image is 2.gif and it links
to 3.html. Say this continues up to some arbitrarily high number.
If one executes the command:
wget -r -l 2 http://<site>/1.html
then 1.html, 1.gif, 2.html, 2.gif, and 3.html will be downloaded.
As you can see, 3.html is without its requisite 3.gif because Wget
is simply counting the number of hops (up to 2) away from 1.html in
order to determine where to stop the recursion. However, with this
command:
wget -r -l 2 -p http://<site>/1.html
all the above files and 3.html's requisite 3.gif will be down-
loaded. Similarly,
wget -r -l 1 -p http://<site>/1.html
will cause 1.html, 1.gif, 2.html, and 2.gif to be downloaded. One
might think that:
wget -r -l 0 -p http://<site>/1.html
would download just 1.html and 1.gif, but unfortunately this is not
the case, because -l 0 is equivalent to -l inf---that is, infinite
recursion. To download a single HTML page (or a handful of them,
all specified on the command-line or in a -i URL input file) and
its (or their) requisites, simply leave off -r and -l:
wget -p http://<site>/1.html
Note that Wget will behave as if -r had been specified, but only
that single page and its requisites will be downloaded. Links from
that page to external documents will not be followed. Actually, to
download a single page and all its requisites (even if they exist
on separate websites), and make sure the lot displays properly
locally, this author likes to use a few options in addition to -p:
wget -E -H -k -K -p http://<site>/<document>
To finish off this topic, it's worth knowing that Wget's idea of an
external document link is any URL specified in an "<A>" tag, an
"<AREA>" tag, or a "<LINK>" tag other than "<LINK
REL="stylesheet">".
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