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controller.xql
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controller.xql
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xquery version "3.0";
import module namespace config="http://www.tei-c.org/tei-simple/config" at "modules/config.xqm";
declare variable $exist:path external;
declare variable $exist:resource external;
declare variable $exist:controller external;
declare variable $exist:prefix external;
declare variable $exist:root external;
declare variable $allowOrigin := local:allowOriginDynamic(request:get-header("Origin"));
declare function local:allowOriginDynamic($origin as xs:string?) {
let $origin := replace($origin, "^(\w+://[^/]+).*$", "$1")
return
if (local:checkOriginWhitelist($config:origin-whitelist, $origin)) then
$origin
else
"*"
};
declare function local:checkOriginWhitelist($regexes, $origin) {
if (empty($regexes)) then
false()
else if (matches($origin, head($regexes))) then
true()
else
local:checkOriginWhitelist(tail($regexes), $origin)
};
if ($exist:path eq '') then
<dispatch xmlns="http://exist.sourceforge.net/NS/exist">
<redirect url="{request:get-uri()}/"/>
</dispatch>
else if ($exist:path eq "/") then
(: forward root path to index.xql :)
<dispatch xmlns="http://exist.sourceforge.net/NS/exist">
<redirect url="start.html"/>
</dispatch>
(: static HTML page for API documentation should be served directly to make sure it is always accessible :)
else if ($exist:path eq '/api.html') then
<dispatch xmlns="http://exist.sourceforge.net/NS/exist">
<forward url="{$exist:controller}/templates/api.html"/>
</dispatch>
(: static resources from the resources, transform, templates, odd or modules subirectories are directly returned :)
else if (matches($exist:path, "^.*/(resources|transform|templates)/.*$")
or matches($exist:path, "^.*/odd/.*\.css$")
or matches($exist:path, "^.*/modules/.*\.json$")) then
let $dir := replace($exist:path, "^.*/(resources|transform|modules|templates|odd)/.*$", "$1")
return
<dispatch xmlns="http://exist.sourceforge.net/NS/exist">
<forward url="{$exist:controller}/{$dir}/{substring-after($exist:path, '/' || $dir || '/')}">
{
if ($dir = "transform") then
<set-header name="Cache-Control" value="no-cache"/>
else if (contains($exist:path, "/resources/fonts/")) then
<set-header name="Cache-Control" value="max-age=31536000"/>
else (
<set-header name="Access-Control-Allow-Origin" value="{$allowOrigin}"/>,
if ($allowOrigin = "*") then () else <set-header name="Access-Control-Allow-Credentials" value="true"/>
)
}
</forward>
</dispatch>
(: other images are resolved against the data collection and also returned directly :)
else if (matches($exist:resource, "\.(png|jpg|jpeg|gif|tif|tiff|txt|mei)$", "s")) then
<dispatch xmlns="http://exist.sourceforge.net/NS/exist">
<forward url="{$exist:controller}/data/{$exist:path}"/>
</dispatch>
(: all other requests are passed on the Open API router :)
else
let $main := if (matches($exist:path, "^/+api/+(?:odd|lint)")) then "api-odd.xql" else "api.xql"
return
<dispatch xmlns="http://exist.sourceforge.net/NS/exist">
<forward url="{$exist:controller}/modules/lib/{$main}">
<set-header name="Access-Control-Allow-Origin" value="{$allowOrigin}"/>
{ if ($allowOrigin = "*") then () else <set-header name="Access-Control-Allow-Credentials" value="true"/> }
<set-header name="Access-Control-Allow-Methods" value="GET, POST, DELETE, PUT, PATCH, OPTIONS"/>
<set-header name="Access-Control-Allow-Headers" value="Content-Type, api_key, Authorization"/>
<set-header name="Access-Control-Expose-Headers" value="pb-start, pb-total"/>
<set-header name="Cache-Control" value="no-cache"/>
</forward>
</dispatch>