Parse an html form
I think that one can not claim to be a REBOL programmer unless one can use "parse."
Anyway, let's say I have an html page that contains a form, part of which is shown below.
I want to do a little experimenting with generating python code, so I want to obtain all the "name" attributes for the "input" items on the form. That would be "almform-house," "almform-street," and "almform-submit."
I am able to parse off the "form" part of the html page, as shown in the sample below. After that, I can't even parse off one name, let alone all of them, and I have no idea how to proceed.
I wonder if someone can offer guidance.
Thank you. Code samples follow.
Demo form
R E B O L [
Title: "Parse html form for input names"
]
;; -- Read the html file
HTMLFILE: %rtest-buildmarkup.html
HTMLTEXT: read HTMLFILE
;; -- Pick off the html form embedded somewhere in the html file
HTMLFORM: copy ""
parse HTMLTEXT [thru "
;; -- Get the names of all input fields...but how?
;; -- Parsing for the name tag returns nothing.
;; -- And how would I do more than one anyway?
INPUTNAMES: copy ""
parse HTMLFORM [thru ""]
;; -- Stop for probing
halt
posted by: Steven White 28-Jun-2018/15:06:04-7:00
inputnames: copy []
parse htmlform [
any [thru {name="} copy nm to {"} (append inputnames nm)] to end
]
editor inputnames
(Note that you don't really every need the first parse in your example)
posted by: Nick 29-Jun-2018/11:03:03-7:00
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