From 5ede024b4cad7422e20d2884a6c3cb3113a6eeca Mon Sep 17 00:00:00 2001
From: Steve Korshakov <steve@korshakov.com>
Date: Wed, 27 Aug 2025 00:27:32 -0700
Subject: [PATCH] fix: handle empty JSON bodies in content type parser
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Fix "Unexpected end of JSON input" error by:
- Check for empty/whitespace-only body before parsing
- Return empty object for empty bodies instead of failing
- Add detailed error logging for debugging JSON parse failures
- Prevent crashes on malformed or empty request bodies

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 sources/app/api.ts | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/sources/app/api.ts b/sources/app/api.ts
index c7832aa..6489d51 100644
--- a/sources/app/api.ts
+++ b/sources/app/api.ts
@@ -97,11 +97,21 @@ export async function startApi(): Promise<{ app: FastifyInstance; io: Server }>
         { parseAs: 'string' },
         function (req, body, done) {
             try {
-                const json = JSON.parse(body as string);
+                const bodyStr = body as string;
+                
+                // Handle empty body case
+                if (!bodyStr || bodyStr.trim() === '') {
+                    (req as any).rawBody = bodyStr;
+                    done(null, {});
+                    return;
+                }
+                
+                const json = JSON.parse(bodyStr);
                 // Store raw body for webhook signature verification
-                (req as any).rawBody = body;
+                (req as any).rawBody = bodyStr;
                 done(null, json);
             } catch (err: any) {
+                log({ module: 'content-parser', level: 'error' }, `JSON parse error: ${err.message}, body: "${body}"`);
                 err.statusCode = 400;
                 done(err, undefined);
             }