diff --git a/src/modules/snippet/snippet.readme.md b/src/modules/snippet/snippet.readme.md
index 887c818f..8ea2e4eb 100644
--- a/src/modules/snippet/snippet.readme.md
+++ b/src/modules/snippet/snippet.readme.md
@@ -146,6 +146,9 @@ And other global api is all banned.
 
 # TODO
 
-- HTTP Methods: POST, PUT, DELETE, PATCH
-- ResponseType: buffer, stream
-- handle safeEval throw
+- [ ] HTTP Methods: POST, PUT, DELETE, PATCH
+- [ ] ResponseType: buffer, stream
+- [ ] handle safeEval throw
+- [ ] MongoDb inject (can access db)
+- [ ] set Content-Type
+
diff --git a/src/modules/snippet/snippet.service.ts b/src/modules/snippet/snippet.service.ts
index c9a2ead6..27d91361 100644
--- a/src/modules/snippet/snippet.service.ts
+++ b/src/modules/snippet/snippet.service.ts
@@ -169,6 +169,9 @@ export class SnippetService {
       // inject some zx utils
       fetch,
 
+      // inject Global API
+      Buffer,
+
       // inject logger
       console: logger,
       logger,
@@ -291,6 +294,7 @@ export class SnippetService {
     return typeof handler === 'function'
     `)
     } catch (e) {
+      console.error(e.message)
       return false
     }
   }