gaoxingliang opened a new issue, #12205:
URL: https://github.com/apache/apisix/issues/12205
### Current Behavior
I have a post response plugin and find when the upstream return a non-200
code, the apisix fail to respond.
I did following investigations:
**(1) in my plugin code looks like:**
```
@Component
public class EncryptResponseFilter implements PluginFilter {
private final Logger logger =
LoggerFactory.getLogger(EncryptResponseFilter.class);
@Override
public String name() {
return "EncryptResponseFilter";
}
@Override
public void postFilter(PostRequest request, PostResponse response,
PluginFilterChain chain) {
logger.warn("EncryptResponseFilter return non 200 code：{},
headers:{}", request.getUpstreamStatusCode(), headers);
response.setStatusCode(Optional.ofNullable(request.getUpstreamStatusCode()).orElse(500));
try {
// if code is not 200, just return the raw response
String rawResponseBody =
request.getBody(Charset.forName("UTF-8"));
logger.warn("EncryptResponseFilter return non 200 code：{},
headers:{}, raw response body:{}", request.getUpstreamStatusCode(), headers,
rawResponseBody);
response.setBody(rawResponseBody);
response.setHeader("Content-Length", null);
} catch (Exception e){
logger.warn("EncryptResponseFilter return non 200 code fail
to set response body", e);
}
}
chain.postFilter(request, response);
}
@Override
public Boolean requiredRespBody() {
return true;
}
@Override
public Boolean requiredBody() {
return true;
}
}
```
and my plugin logged the upstream code and response:
```
[]05-13 02:37:37.950.+0000[] [WARN
][epollEventLoopGroup-2-5][o.a.a.p.r.f.EncryptResponseFilter.postFilter:73]EncryptResponseFilter
return non 200 code?400, headers:{date=[Tue, 13 May 2025 02:37:37 GMT],
internal-userid=[6], transfer-encoding=[chunked], connection=[close],
content-type=[application/json], internal-nickname=xxx,
internal-username=[xxx]}, raw response body:{"message":"xxx productId"}
```
(2) in the apisix log: (the log flushes too much. the time is different
while the content and format is same.)
```
2025/05/13 02:25:05 [warn] 60#60: *14279300 a client request body is
buffered to a temporary file /usr/local/apisix/client_body_temp/0000042246,
client: 117.172.., server: _, request: "POST
/v1/enterprises/customized/modules/whites HTTP/1.0", host: "yyyy.cn:8888"
2025/05/13 02:25:05 [warn] 60#60: *14279300 [lua] plugin.lua:1107:
common_phase(): ext-plugin-post-resp exits with http status code 400, client:
117.172.., server: _, request: "POST /v1/enterprises/customized/modules/whites
HTTP/1.0", host: "yyyy.cn:8888"
```
**(3) in the wireshark capture, I found a tls v1.2 alert close notify. no
response set in the plugin received.** I have a same env in development (APISIX
version 3.6.0), the plugin is same, the error body is received. the difference
is :**the develop env is HTTP while prod is HTTPS**
(4) route conf
for develop env:
```
{
"uri": "/v1/enterprises/customized/modules/whites",
"name": "API-白名单查询",
"methods": [
"POST"
],
"host": "xxxx.cn",
"plugins": {
"ext-plugin-post-req": {
"_meta": {
"disable": false
},
"conf": [
{
"name": "DecryptRequestFilter",
"value": "{}"
}
]
},
"ext-plugin-post-resp": {
"_meta": {
"disable": false
},
"conf": [
{
"name": "EncryptResponseFilter",
"value": "{}"
}
]
},
"wolf-rbac": {
"_meta": {
"disable": false
}
}
},
"upstream": {
"nodes": [
{
"host": "xxx.test",
"port": 7083,
"weight": 1
}
],
"timeout": {
"connect": 6,
"send": 6,
"read": 45
},
"type": "roundrobin",
"scheme": "http",
"pass_host": "pass",
"keepalive_pool": {
"idle_timeout": 60,
"requests": 1000,
"size": 320
}
},
"status": 1
}
```
for prod env:
```
{
"uri": "/v1/enterprises/customized/modules/whites",
"name": "API-白名单查询",
"methods": [
"POST"
],
"host": "yyyyy.cn",
"plugins": {
"ext-plugin-post-req": {
"_meta": {
"disable": false
},
"conf": [
{
"name": "DecryptRequestFilter",
"value": "{}"
}
]
},
"ext-plugin-post-resp": {
"_meta": {
"disable": false
},
"conf": [
{
"name": "EncryptResponseFilter",
"value": "{}"
}
]
},
"wolf-rbac": {
"_meta": {
"disable": false
}
}
},
"upstream": {
"nodes": [
{
"host": "yyyy.prod",
"port": 7083,
"weight": 1
}
],
"timeout": {
"connect": 6,
"send": 6,
"read": 45
},
"type": "roundrobin",
"scheme": "http",
"pass_host": "pass",
"keepalive_pool": {
"idle_timeout": 60,
"requests": 1000,
"size": 320
}
},
"status": 1
}
```
### Expected Behavior
1, the error content body should be received.
### Error Logs
_No response_
### Steps to Reproduce
I'm not sure this can be reproduced or not.
### Environment
- APISIX version (run `apisix version`): 3.6.0
- Operating system (run `uname -a`): official docker images
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