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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

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I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Reading json via http
Tcl on the Web example from a Well House Consultants training course
More on Tcl on the Web [link]

This example is described in the following article(s):
   • Reading from a URL, and reading Json, from your Tcl script - [link]

This example references the following resources:
http://www.wellho.net/services/pix.json]

Source code: getpagejson Module: T241

package require http
package require json

# open the URL to get the results:

set handle [::http::geturl http://www.wellho.net/services/pix.json]

set body [::http::data $handle]
puts "------------------------------------------------"
puts "return content:\n$body"
puts "------------------------------------------------"

set asadict [::json::json2dict $body]
foreach {name wotsit} $asadict {
        puts "$name $wotsit"
        }

puts "------------------------------------------------"

# -------- above is nice. Below is too "clever" (it isn't working nicely yet)

proc display {content {inset 0}} {
        set extra 0
        foreach {item} $content {
                if {[llength $item] > 1} {
                        display $item [expr $inset + 2]
                } else {
                        set tabbycat [string repeat " " [expr $extra + $inset]]
                        set xl [lindex {k: - v:} $extra]
                        puts "$tabbycat $xl $item"
                }
        set extra [expr 2 - $extra]
        }
        puts ""
}

display $asadict

#
# munchkin:survey grahamellis$ tclsh getpagejson
# ------------------------------------------------
# return content:
# {"timedat":1426197504,"lookfor":"pix","acc":[{"when":9,"where":"86.131.16.xx",
# "which":"\/pix\/portrush4.jpg"},{"when":11,"where":"81.174.153.xx", [etc]
#
# ------------------------------------------------
# timedat 1426197504
# lookfor pix
# acc {when 9 where 86.131.16.xx which /pix/portrush4.jpg} {when 11 where
# 81.174.153.xx which /pix/my1_14.jpg} {when 18 where 79.77.221.xx which [etc]
# ------------------------------------------------
# k: timedat
# v: 1426197504
# k: lookfor
# v: pix
# k: acc
# k: when
# v: 9
# k: where
# v: 86.131.16.xx
# k: which
# v: /pix/portrush4.jpg
#
# k: when
# v: 11
# k: where
# v: 81.174.153.xx
# k: which
# v: /pix/my1_14.jpg
#
# k: when
# v: 18
# k: where
# v: 79.77.221.xx
# k: which
# v: /pix/my1_46.jpg
#
# [etc]
#
# munchkin:survey grahamellis$
Learn about this subject
This module and example are covered on our public Tcl/Tk course. If you have a group of three or more trainees who need to learn the subject, we can also arrange a private or on site course for you.

Books covering this topic
Yes. We have over 700 books in our library. Books covering Tcl, Tk and Expect are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "Tcl on the Web" training module. You'll find a description of the topic and some other closely related examples on the "Tcl on the Web" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
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This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

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Past attendees on our training courses are welcome to use individual examples in the course of their programming, but must check the examples they use to ensure that they are suitable for their job. Remember that some of our examples show you how not to do things - check in your notes. Well House Consultants take no responsibility for the suitability of these example programs to customer's needs.

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