From 1d601c172a52504db79b7b85c77be42eee8cacd1 Mon Sep 17 00:00:00 2001
From: K-hermes <K-hermes@qq.com>
Date: Sat, 15 Aug 2026 14:11:19 +0800
Subject: [PATCH] =?UTF-8?q?debug:=20=E5=A2=9E=E5=BC=BA=20JSON=20=E8=A7=A3?=
 =?UTF-8?q?=E6=9E=90=E9=94=99=E8=AF=AF=E7=9A=84=E8=B0=83=E8=AF=95=E4=BF=A1?=
 =?UTF-8?q?=E6=81=AF?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

改进：
- 记录接收到的请求体大小
- JSON 解析失败时返回详细错误信息
- 返回解析错误详情、body 大小、前 200 字符预览
- 在日志中记录前 500 字符，方便排查问题
---
 nginx/nginx.conf | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index 71be6f0..b4d4f68 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -157,11 +157,22 @@ http {
                         return
                     end
                     
+                    -- 记录请求体大小，方便调试
+                    ngx.log(ngx.INFO, "Received body size: ", string.len(body))
+                    
                     -- 解析 JSON
                     local ok, data = pcall(cjson.decode, body)
                     if not ok then
+                        -- 记录解析错误的详细信息
+                        ngx.log(ngx.ERR, "JSON parse error: ", data)
+                        ngx.log(ngx.ERR, "Body preview (first 500 chars): ", string.sub(body, 1, 500))
                         ngx.status = 400
-                        ngx.say(cjson.encode({error = "Invalid JSON"}))
+                        ngx.say(cjson.encode({
+                            error = "Invalid JSON",
+                            details = tostring(data),
+                            body_size = string.len(body),
+                            body_preview = string.sub(body, 1, 200)
+                        }))
                         return
                     end