Merge pull request #120 from zazuko/no-redirect

feat: send shapes directly without redirect

.changeset/slimy-ravens-chew.md

@@ -0,0 +1,5 @@
+---
+"cube-link": patch
+---
+
+Forward profiles directly from GitHub

trifid/redirect.js

@@ -1,4 +1,5 @@
 // @ts-check
+const { Readable } = require('stream')
 const { fetchBuilder, MemoryCache } = require('node-fetch-cache')
 
 /**
@@ -54,7 +55,26 @@ function factory () {
         }
       }
       if (shapePath) {
-        return res.redirect(`https://raw.githubusercontent.com/zazuko/cube-link/${versionPath}/validation/${shapePath}.ttl`)
+        try {
+          const rawGithub = await fetch(`https://raw.githubusercontent.com/zazuko/cube-link/${versionPath}/validation/${shapePath}.ttl`)
+          if (rawGithub.ok) {
+            res.set('Content-Type', 'text/turtle')
+          } else {
+            res.status(500)
+          }
+          // if the shape does not exist, we return a 404
+          if (rawGithub.status === 404) {
+            return res.sendStatus(404)
+          }
+          /** @type {any | null} */
+          const body = rawGithub.body
+          if (!rawGithub.body) {
+            throw new Error('No body')
+          }
+          return Readable.fromWeb(body).pipe(res)
+        } catch (e) {
+          return res.status(502).send(`Error fetching shape: ${e.message}`)
+        }
       }
     }