fix: fix bugs about 3rd-party login in cas flow (casdoor#1096)

web/src/auth/AuthCallback.js

@@ -50,8 +50,12 @@ class AuthCallback extends React.Component {
       // Casdoor's own login page, so "code" is not necessary
       if (realRedirectUri === null) {
         const samlRequest = innerParams.get("SAMLRequest");
+        // cas don't use 'redirect_url', it is called 'service'
+        const casService = innerParams.get("service");
         if (samlRequest !== null && samlRequest !== undefined && samlRequest !== "") {
           return "saml";
+        } else if (casService !== null && casService !== undefined && casService !== "") {
+          return "cas";
         }
         return "login";
       }
@@ -97,6 +101,7 @@ class AuthCallback extends React.Component {
     const providerName = innerParams.get("provider");
     const method = innerParams.get("method");
     const samlRequest = innerParams.get("SAMLRequest");
+    const casService = innerParams.get("service");
 
     const redirectUri = `${window.location.origin}/callback`;
 
@@ -111,6 +116,31 @@ class AuthCallback extends React.Component {
       redirectUri: redirectUri,
       method: method,
     };
+
+    if (this.getResponseType() === "cas") {
+      // user is using casdoor as cas sso server, and wants the ticket to be acquired
+      AuthBackend.loginCas(body, {"service": casService}).then((res) => {
+        if (res.status === "ok") {
+          let msg = "Logged in successfully.";
+          if (casService === "") {
+            // If service was not specified, Casdoor must display a message notifying the client that it has successfully initiated a single sign-on session.
+            msg += "Now you can visit apps protected by Casdoor.";
+          }
+          Util.showMessage("success", msg);
+
+          if (casService !== "") {
+            const st = res.data;
+            const newUrl = new URL(casService);
+            newUrl.searchParams.append("ticket", st);
+            window.location.href = newUrl.toString();
+          }
+        } else {
+          Util.showMessage("error", `Failed to log in: ${res.msg}`);
+        }
+      });
+      return;
+    }
+    // OAuth
     const oAuthParams = Util.getOAuthGetParameters(innerParams);
     const concatChar = oAuthParams?.redirectUri?.includes("?") ? "&" : "?";
     AuthBackend.login(body, oAuthParams)