add support for getServerSideProps in Next.js

Author: erik-krogh

javascript/ql/src/semmle/javascript/frameworks/Next.qll

@@ -74,7 +74,7 @@ private module NextJS {
       (
         pred =
           pageModule
-              .getAnExportedValue("getStaticProps")
+              .getAnExportedValue(["getStaticProps", "getServerSideProps"])
               .getAFunctionValue()
               .getAReturn()
               .getALocalSource()

javascript/ql/test/library-tests/frameworks/Next/pages/[my-fallback-id].jsx

@@ -15,12 +15,21 @@ export async function getStaticProps({ params }) {
     }
 }
 
-export default function Post({ taint, stars }) {
+export default function Post({ taint, stars, more }) {
     sink(taint);
     sink(stars);
+    sink(more);
     return <span />;
 }
 
 Post.getInitialProps = async (ctx) => {
     return { stars: source(2) }
+}
+
+export async function getServerSideProps(ctx) {
+    return {
+        props: {
+            more: source(3)
+        }
+    }
 }

javascript/ql/test/library-tests/frameworks/Next/tests.expected

@@ -2,4 +2,5 @@ remoteFlow
 | pages/[my-fallback-id].jsx:9:40:9:45 | params |
 dataFlow
 | pages/[my-fallback-id].jsx:13:20:13:27 | source() | pages/[my-fallback-id].jsx:19:10:19:14 | taint |
-| pages/[my-fallback-id].jsx:25:21:25:29 | source(2) | pages/[my-fallback-id].jsx:20:10:20:14 | stars |
+| pages/[my-fallback-id].jsx:26:21:26:29 | source(2) | pages/[my-fallback-id].jsx:20:10:20:14 | stars |
+| pages/[my-fallback-id].jsx:32:19:32:27 | source(3) | pages/[my-fallback-id].jsx:21:10:21:13 | more |