fix: misskey detection could fail due to an early axios throw

megalodon/src/megalodon.ts

@@ -1334,7 +1334,7 @@ type Instance = {
 
 /**
  * Detect SNS type.
- * Now support Mastodon, Pleroma and Pixelfed.
+ * Now support Mastodon, Pleroma and Pixelfed. Throws an error when no known platform can be detected.
  *
  * @param url Base URL of SNS.
  * @param proxyConfig Proxy setting, or set false if don't use proxy.
@@ -1352,16 +1352,28 @@ export const detector = async (url: string, proxyConfig: ProxyConfig | false = f
     })
   }
 
-  const res = await axios.get<Instance>(url + '/api/v1/instance', options)
-  if (res.data.title) {
-    if (res.data.pleroma) {
-      return 'pleroma'
+  try {
+    const res = await axios.get<Instance>(url + '/api/v1/instance', options)
+    if (res.data.title) {
+      if (res.data.pleroma) {
+        return 'pleroma'
+      } else {
+        return 'mastodon'
+      }
     } else {
-      return 'mastodon'
+      throw new Error('no known platform could be detected')
     }
-  } else {
-    await axios.post<{}>(url + '/api/meta', {}, options)
-    return 'misskey'
+  } catch (err: any) {
+    if (err && err.response && err.response.status === 404) {
+      try {
+        await axios.post<{}>(url + '/api/meta', {}, options)
+        return 'misskey'
+      } catch (err) {
+        throw new Error('no known platform could be detected')
+      }
+    }
+
+    throw err
   }
 }
 

megalodon/test/integration/megalodon.spec.ts

@@ -24,4 +24,12 @@ describe('detector', () => {
       expect(misskey).toEqual('misskey')
     })
   })
+
+  describe('unknown', () => {
+    const url = 'https://google.com'
+    it('should be null', async () => {
+      const unknown = detector(url)
+      await expect(unknown).rejects.toThrow()
+    })
+  })
 })