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# Setup:
set BASEURL https://sqlite.org/u
set ADMIN_CAPABILITY i
set DATABASE /url-shortener.db
#
########
package require wapp
# Common header for all pages that do no redirect
#
proc common-header {} {
wapp-trim {
<div class='fossil-doc' data-title='URL Shortener'>
}
}
proc common-footer {} {
wapp-trim {
</div>
}
}
# Open the shortener database. Initialize it if necessary.
#
proc open-database {} {
global DATABASE
sqlite3 db $DATABASE
db eval {
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) WITHOUT ROWID;
}
}
# Debugging: show the environment
proc wapp-page-env {} {
wapp-allow-xorigin-params
common-header
wapp-trim {
<h1>Wapp Environment</h1>
<pre>%html([wapp-debug-env])</pre>
}
common-footer
}
# Issue the "Not Found" page
proc wapp-page-notfound {} {
proc wapp-page-nf {} {
wapp-reply-code "404 Not Found"
wapp-trim {
<h1>Not Found</h1>
<p>No such resource:
"%html%([wapp-param BASE_URL])%%html%([wapp-param PATH_INFO])%"</p>
}
}
# Do a redirect
proc wapp-default {} {
set x [wapp-param PATH_HEAD {}]
if {$x==""} {
wapp-page-search
wapp-page-sx
return
}
open-database
set redir [db one {SELECT redir FROM url WHERE name=$x}]
if {$redir==""} {
wapp-page-notfound
wapp-page-nf
return
}
wapp-redirect $redir
}
# Check credentials. Return true to abort because credentials
# are invalid.
#
proc check-credentials {} {
global ADMIN_CAPABILITY env
if {![info exists env(FOSSIL_CAPABILITIES)]} {
wapp-page-notfound
wapp-page-nf
return 1
}
return 0
}
# Search for an existing entry
#
proc wapp-page-search {} {
proc wapp-page-sx {} {
if {[check-credentials]} return
common-header
set base [wapp-param BASE_URL]
wapp-trim {
<h1>Admin URL Shortener At %html%($::DATABASE)%</h1>
<p><a href="%url($base)/editentry">Create-New-URL</a>
SELECT name, redir FROM url
SELECT name, redir, user, mtime FROM url
WHERE name LIKE $pattern OR redir LIKE $pattern
} {
wapp-trim {
<li><a href="%url($base)/editentry/%url($name)">%html($name)</a>
<li><a href="%url($base)/ee/%url($name)">%html($name)</a>
→ %html($redir) (by %html($user) on %html($mtime))
}
incr cnt
}
wapp-trim {</ol>}
if {$cnt==0} {
wapp-trim {
<p>No matches found</p>
}
}
}
common-footer
}
# Show recent modified URL shorteners pages
#
proc wapp-page-lr {} {
if {[check-credentials]} return
common-header
set base [wapp-param BASE_URL]
wapp-trim {
<p>
<a href="%url($base)/ee">Create-New-URL</a>
<a href="%url($base)/sx">Search</a>
<a href="%url($base)/env">CGI-Environment</a>
}
wapp-trim {
<ol>
}
open-database
set cnt 0
db eval {
SELECT name, redir, user, mtime FROM url
ORDER BY mtime DESC LIMIT 50
} {
wapp-trim {
<li><a href="%url($base)/ee/%url($name)">%html($name)</a>
→ %html($redir) (by %html($user) on %html($mtime))
}
incr cnt
}
wapp-trim {</ol>}
if {$cnt==0} {
wapp-trim {
<p>No entries</p>
}
}
common-footer
}
# Create or edit a new URL shortener entry.
#
# Name of the entry to be editted is in PATH_TAIL. Or if PATH_TAIL is
# blank, create a new entry.
#
proc wapp-page-editentry {} {
proc wapp-page-ee {} {
global BASEURL
if {[check-credentials]} return
common-header
if {[wapp-param-exists cancel]} {
wapp-redirect [wapp-param BASEURL]/search
wapp-redirect [wapp-param BASE_URL]/sx
return
}
open-database
set hardname [wapp-param PATH_TAIL {}]
set name [wapp-param name $hardname]
set redir [wapp-param redir {}]
set notes [wapp-param notes {}]
wapp-trim {
<head></head>
<body>
}
set errmsg {}
if {[wapp-param-exists s1]} {
if {$hardname==""} {
set e [db one {SELECT count(*) FROM url WHERE name=$name}]
if {$e==1} {
set errmsg "Shortened URL name "$name" already exists.\
set errmsg "Shortened URL name \"$name\" already exists.\
Pick a different name."
} elseif {[string length $name]<4} {
set errmsg "Shortened URL name "$name" too short.\
set errmsg "Shortened URL name \"$name\" too short.\
Must be at least 4 characters."
} elseif {[regexp {[^a-z0-9]} $name]} {
set errmsg "Shortened URL name "$name" contains invalid characters. \
set errmsg "Shortened URL name \"$name\" contains invalid characters. \
The name must be lower-case ASCII letters and digits only."
} elseif {[lsearch [info procs] wapp-page-$name]>=0} {
set errmsg "Shortened URL name \"$name\" already exists.\
Pick a different name."
} else {
set user $::env(FOSSIL_USER)
db eval {
INSERT INTO url(name,redir,user,notes,ctime,mtime)
VALUES($name,$redir,$user,$notes,datetime(),datetime())
}
set hardname $name
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<td> </td>
<td><input type="submit" name="s1" value="Submit">
<input type="submit" name="cancel" value="Cancel">
</tr>
</table>
</form>
}
common-footer
}
wapp-start $argv
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