Added implementation for base page and log in log out

routes/login.tsx

@@ -0,0 +1,102 @@
+import { Handlers } from "$fresh/server.ts";
+import { State } from "./_middleware.ts";
+import { parse, type XmlNode } from "@melvdouc/xml-parser";
+import { createJwt } from "@popov/jwt";
+import { setCookie } from "$std/http/cookie.ts";
+
+
+const SERVICE = "https://localhost/login";
+const CAS = "https://ident.univ-amu.fr/cas";
+
+
+function getTag(tag: XmlNode): [string, string] {
+  return [
+    tag.tagName.replace("cas:", ""),
+    tag.children[0].value
+  ];
+}
+
+
+async function createUserJWT(casResponse: XmlNode): Promise<string> {
+  const nodes = casResponse.children[1].children.map(getTag);
+  const fullUserInfos = {};
+
+  nodes.forEach(([key, value]) => {
+    if (fullUserInfos[key] && Array.isArray(fullUserInfos[key])) {
+      fullUserInfos[key].push(value);
+    }
+    else if (fullUserInfos[key]) {
+      fullUserInfos[key] = [fullUserInfos[key], value];
+    }
+    else {
+      fullUserInfos[key] = value;
+    }
+  });
+
+  const now = Math.floor(Date.now() / 1000);
+  const oneHour = 60 * 60;
+
+  const payload = {
+    iss: "PolyMPR",
+    iat: now,
+    exp: now + oneHour,
+    aud: "PolyMPR",
+    user: fullUserInfos
+  };
+
+  const key = "NEED TO CHANGE THIS KEY FURTHER IN DEV";
+  return createJwt(payload, key);
+}
+
+
+export const handler: Handlers<any, State> = {
+  async GET(request, context) {
+    const url = new URL(request.url);
+    const ticket = url.searchParams.get("ticket");
+
+    if (ticket) {
+      const response = await fetch(`${CAS}/serviceValidate?service=${SERVICE}&ticket=${ticket}`);
+      const body = parse(await response.text(), "application/xml");
+      const casResponse = body[0].children[0];
+
+      if (casResponse.tagName != "cas:authenticationSuccess") {
+        return new Response(null, {
+          status: 302,
+          headers: {
+            Location: `${CAS}/login?service=${SERVICE}`
+          }
+        });
+      }
+
+      const headers = new Headers();
+
+      setCookie(headers, {
+        name: "sessionToken",
+        value: await createUserJWT(casResponse)
+      });
+      headers.set("Location", "/apps");
+
+      return new Response(null, {
+        status: 302,
+        headers
+      });
+    }
+
+    if (context.state.isAuthenticated) {
+      return new Response(null, {
+        status: 302,
+        headers: {
+          Location: "/apps"
+        }
+      });
+    }
+    else {
+      return new Response(null, {
+        status: 302,
+        headers: {
+          Location: `${CAS}/login?service=${SERVICE}`
+        }
+      });
+    }
+  }
+};