## ## NOTE: The purpose of this procedure is to take the base URL of the ## Fossil project and return the root of the entire web site using ## the same URI scheme as the base URL (e.g. http or https). ## proc getLogoUrl { baseurl } { set idx(first) [string first // $baseurl] if {$idx(first) != -1} { ## ## NOTE: Skip second slash. ## set idx(first+1) [expr {$idx(first) + 2}] ## ## NOTE: (part 1) The [string first] command does NOT actually ## support the optional startIndex argument as specified ## in the TH1 support manual; therefore, we fake it by ## using the [string range] command and then adding the ## necessary offset to the resulting index manually ## (below). In Tcl, we could use the following instead: ## ## set idx(next) [string first / $baseurl $idx(first+1)] ## set idx(nextRange) [string range $baseurl $idx(first+1) end] set idx(next) [string first / $idx(nextRange)] if {$idx(next) != -1} { ## ## NOTE: (part 2) Add the necessary offset to the result of ## the search for the next slash (i.e. the one after ## the initial search for the two slashes). ## set idx(next) [expr {$idx(next) + $idx(first+1)}] ## ## NOTE: Back up one character from the next slash. ## set idx(next-1) [expr {$idx(next) - 1}] ## ## NOTE: Extract the URI scheme and host from the base URL. ## set scheme [string range $baseurl 0 $idx(first)] set host [string range $baseurl $idx(first+1) $idx(next-1)] ## ## NOTE: Try to stay in SSL mode if we are there now. ## if {[string compare $scheme http:/] == 0} { set scheme http:// } else { set scheme https:// } set logourl $scheme$host/ } else { set logourl $baseurl } } else { set logourl $baseurl } return $logourl } set logourl [getLogoUrl $baseurl]