| What | Wapp |
| Where | https://wapp.tcl-lang.org/ |
| Description | A lightweight, secure web microframework in a single source file. Serves HTTP/1.1 directly, but supports CGI and SCGI as well. Aims for a small, easy-to-learn user API. |
| Prerequisites | Tcl 8.6 or 9 |
| Updated | 2024-11-22 |
| Author | drh |
| License | 2-clause BSD |
fossil clone https://wapp.tcl.tk/ wapp.fossil mkdir wapp cd wapp fossil open ../wapp.fossil tclsh tests/test01.tcl
or see other alternatives at https://wapp.tcl.tk/index.html/doc/trunk/docs/download.md
DEC And you get hold of it by......?
AM See the link above
DEC Which one?, No simple zip file then.. EMJ Again, see above, particularly the "other alternatives" link.
The following code excerpt results in no image being shown in browser. However, when I bring up the text view of the HTML (via ctrl-U on Chrome browser) and click the link from there, the image shows up. Why does the image not show up through wapp-default? 'Hello' prints as expected. Thanks in advance, Doug. (I replaced the real domain with example.com)
#!/usr/bin/tclsh
source <full_path>/lib/wapp/wapp.tcl
proc wapp-default {
wapp-subst {
<img src="http://www.example.com/IMG_1870.JPG" style="width:75%">
<br><b>Hello</b> World!
}
}
wapp-startdbohdan 2018-03-27: That's a consequence of Wapp's default Content Security Policy . (One of Wapp's design goals is to be secure by default , so the default policy is as strict as possible.) You can use curl -v and your Web browser's Console [L1 ] [L2 ] to debug the Content Security Policy.
Here is an example of how you can configure the Content Security Policy to allow images from a certain host:
#! /usr/bin/env tclsh
source wapp.tcl
proc wapp-default {} {
wapp-content-security-policy \
{default-src 'self'; img-src 'self' https://picsum.photos}
wapp-subst {
<!doctype html>
<img src="https://picsum.photos/450/300" style="width:75%">
<br><b>Hello</b> World!
}
}
wapp-start $::argv