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StaticAssetHandler
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<h1 id="handling-http-requests">Handling HTTP requests<a class="headerlink" href="#handling-http-requests" title="Permanent link">&para;</a></h1>
<p>The direction of the arrows was changed slightly here to make the graph readable.
<pre class="mermaid"><code>flowchart LR
HttpHandler("&lt;strong&gt;HttpHandler&lt;/strong&gt;&lt;br&gt;SequenceHandler")
HttpHandler --&gt; HttpHandlerArgs
subgraph HttpHandlerArgs[" "]
direction LR
Middleware("&lt;strong&gt;Middleware&lt;/strong&gt;&lt;br&gt;&lt;i&gt;HttpHandler&lt;/i&gt;")
WaterfallHandler("&lt;br&gt;WaterfallHandler")
end
Middleware --&gt; WaterfallHandler
WaterfallHandler --&gt; WaterfallHandlerArgs
subgraph WaterfallHandlerArgs[" "]
direction TB
StaticAssetHandler("&lt;strong&gt;StaticAssetHandler&lt;/strong&gt;&lt;br&gt;StaticAssetHandler")
SetupHandler("&lt;strong&gt;SetupHandler&lt;/strong&gt;&lt;br&gt;&lt;i&gt;HttpHandler&lt;/i&gt;")
OidcHandler("&lt;strong&gt;OidcHandler&lt;/strong&gt;&lt;br&gt;&lt;i&gt;HttpHandler&lt;/i&gt;")
AuthResourceHttpHandler("&lt;strong&gt;AuthResourceHttpHandler&lt;/strong&gt;&lt;br&gt;&lt;i&gt;HttpHandler&lt;/i&gt;")
IdentityProviderHttpHandler("&lt;strong&gt;IdentityProviderHttpHandler&lt;/strong&gt;&lt;br&gt;&lt;i&gt;HttpHandler&lt;/i&gt;")
LdpHandler("&lt;strong&gt;LdpHandler&lt;/strong&gt;&lt;br&gt;&lt;i&gt;HttpHandler&lt;/i&gt;")
end
StaticAssetHandler --&gt; SetupHandler
SetupHandler --&gt; OidcHandler
OidcHandler --&gt; AuthResourceHttpHandler
AuthResourceHttpHandler --&gt; IdentityProviderHttpHandler
IdentityProviderHttpHandler --&gt; LdpHandler</code></pre></p>
<p>The <code>HttpHandler</code> is responsible for handling an incoming HTTP request.
The request will always first go through the <code>Middleware</code>,
where certain required headers will be added such as CORS headers.</p>
<p>After that it will go through the list in the <code>WaterfallHandler</code>
to find the first handler that understands the request,
with the <code>LdpHandler</code> at the bottom being the catch-all default.</p>
<h2 id="staticassethandler">StaticAssetHandler<a class="headerlink" href="#staticassethandler" title="Permanent link">&para;</a></h2>
<p>The <code>urn:solid-server:default:StaticAssetHandler</code> matches exact URLs to static assets which require no further logic.
An example of this is the favicon, where the <code>/favicon.ico</code> URL
is directed to the favicon file at <code>/templates/images/favicon.ico</code>.
It can also map entire folders to a specific path, such as <code>/.well-known/css/styles/</code> which contains all stylesheets.</p>
<h2 id="setuphandler">SetupHandler<a class="headerlink" href="#setuphandler" title="Permanent link">&para;</a></h2>
<p>The <code>urn:solid-server:default:SetupHandler</code> is responsible
for redirecting all requests to <code>/setup</code> until setup is finished,
thereby ensuring that setup needs to be finished before anything else can be done on the server,
and handling the actual setup request that is sent to <code>/setup</code>.
Once setup is finished, this handler will reject all requests and thus no longer be relevant.</p>
<p>If the server is configured to not have setup enabled,
the corresponding identifier will point to a handler that always rejects all requests.</p>
<h2 id="oidchandler">OidcHandler<a class="headerlink" href="#oidchandler" title="Permanent link">&para;</a></h2>
<p>The <code>urn:solid-server:default:OidcHandler</code> handles all requests related
to the Solid-OIDC <a href="https://solid.github.io/solid-oidc/">specification</a>.
The OIDC component is configured to work on the <code>/.oidc/</code> subpath,
so this handler catches all those requests and sends them to the internal OIDC library that is used.</p>
<h2 id="authresourcehttphandler">AuthResourceHttpHandler<a class="headerlink" href="#authresourcehttphandler" title="Permanent link">&para;</a></h2>
<p>The <code>urn:solid-server:default:AuthResourceHttpHandler</code> is identical
to the <code>urn:solid-server:default:LdpHandler</code> which will be discussed below,
but only handles resources relevant for authorization.</p>
<p>In practice this means that is your server is configured
to use <a href="https://solidproject.org/TR/wac">Web Access Control</a> for authorization,
this handler will catch all requests targeting <code>.acl</code> resources.</p>
<p>The reason these already need to be handled here is so these can also be used
to allow authorization on the following handler(s).
More on this can be found in the <a href="../../../usage/identity-provider/#access">identity provider</a> documentation</p>
<h2 id="identityproviderhttphandler">IdentityProviderHttpHandler<a class="headerlink" href="#identityproviderhttphandler" title="Permanent link">&para;</a></h2>
<p>The <code>urn:solid-server:default:IdentityProviderHttpHandler</code> handles everything
related to our custom identity provider API, such as registering, logging in, returning the relevant HTML pages, etc.
All these requests are identified by being on the <code>/idp/</code> subpath.
More information on the API can be found in the <a href="../../../usage/identity-provider">identity provider</a> documentation</p>
<h2 id="ldphandler">LdpHandler<a class="headerlink" href="#ldphandler" title="Permanent link">&para;</a></h2>
<p>Once a request reaches the <code>urn:solid-server:default:LdpHandler</code>,
the server assumes this is a standard Solid request according to the Solid protocol.
A detailed description of what happens then can be found <a href="../protocol/overview/">here</a></p>
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