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Posted to notifications@apisix.apache.org by GitBox <gi...@apache.org> on 2022/12/02 01:37:00 UTC
[GitHub] [apisix-java-plugin-runner] dev-Wang opened a new issue, #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
dev-Wang opened a new issue, #217:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/217
### Issue description
In order to refresh user's jwt token, i tried to call keycloak to get a new token, then i set it into the ext-plugin-post-req's HttpResponse, but it will stop the request.
so I try to use pre-req plugin and post-resp plugin to deliver the token by request headers, firstly i set the token into the pre-req plugin and expect to get it in the PostRequest.getUpstreamHeaders() so i can set it into the PostResponse. however i can't get the new token by this function. could you help me? thanks.
* your apisix-java-plugin-runner version
0.3.0
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[GitHub] [apisix-java-plugin-runner] dev-Wang commented on issue #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
Posted by GitBox <gi...@apache.org>.
dev-Wang commented on issue #217:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/217#issuecomment-1364824360
it works! thank you so much!
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[GitHub] [apisix-java-plugin-runner] tzssangglass commented on issue #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
Posted by GitBox <gi...@apache.org>.
tzssangglass commented on issue #217:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/217#issuecomment-1336748920
for customrequest headers, we can register vars in `requiredVars`, the header is start with `http_`, for example:
java code
```java
package com.example.demo;
import java.util.ArrayList;
import java.util.List;
import org.apache.apisix.plugin.runner.PostRequest;
import org.apache.apisix.plugin.runner.PostResponse;
import org.apache.apisix.plugin.runner.filter.PluginFilter;
import org.apache.apisix.plugin.runner.filter.PluginFilterChain;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
@Component
public class DemoFilter implements PluginFilter {
private final Logger logger = LoggerFactory.getLogger(DemoFilter.class);
@Override
public String name() {
return "DemoFilter";
}
@Override
public void postFilter(PostRequest request, PostResponse response, PluginFilterChain chain) {
logger.warn("DemoFilter is running");
String http_x_test = request.getVars("http_x_test");
logger.warn("http_x_test: {}", http_x_test);
chain.postFilter(request, response);
}
/**
* If you need to fetch some Nginx variables in the current plugin, you will need to declare them in this function.
* @return a list of Nginx variables that need to be called in this plugin
*/
@Override
public List<String> requiredVars() {
List<String> vars = new ArrayList<>();
vars.add("http_x_test");
return vars;
}
}
```
add route
```shell
curl -i http://127.0.0.1:9180/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/get",
"plugins": {
"ext-plugin-post-resp": {
"conf" : [
{"name": "DemoFilter", "value": "{\"enable\":\"feature\"}"}
]
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"httpbin.org:80": 1
}
}
}'
```
hit route
```shell
curl http://127.0.0.1:9080/get -H "X-TEST: hello"
```
in java runner, we can get
```
2022-12-05 12:48:20.154 WARN 89108 --- [ntLoopGroup-2-2] c.e.d.DemoFilter : http_x_test: hello
```
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[GitHub] [apisix-java-plugin-runner] dev-Wang closed issue #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
Posted by GitBox <gi...@apache.org>.
dev-Wang closed issue #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
URL: https://github.com/apache/apisix-java-plugin-runner/issues/217
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[GitHub] [apisix-java-plugin-runner] tzssangglass commented on issue #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
Posted by GitBox <gi...@apache.org>.
tzssangglass commented on issue #217:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/217#issuecomment-1334685094
> PostRequest.getUpstreamHeaders()
Get the headers returned from the upstream
1. we can get request headers in `filter` by `ext-plugin-pre-req`
2. keep request headers as internal variables
3. use internal variables in postFilter
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[GitHub] [apisix-java-plugin-runner] dev-Wang commented on issue #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
Posted by GitBox <gi...@apache.org>.
dev-Wang commented on issue #217:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/217#issuecomment-1334859056
> > PostRequest.getUpstreamHeaders()
>
> Get the headers returned from the upstream
>
> 1. we can get request headers in `filter` function by `ext-plugin-pre-req`
> 2. keep request headers as internal variables
> 3. use internal variables in `postFilter` by `ext-plugin-post-resp`
Although i can get the token in the `ext-plugin-post-resp` by this way, but i can't ensure the token delivered to the `ext-plugin-post-resp` meet my expectation. Users can send request at the same time. in this situation, how can i ensure a pair of request-response in a filter chain?
eg: i've enabled `ext-plugin-pre-req` and `ext-plugin-post-resp`, user A and user B call a interface at the same time, `postFilter` function will be called twice. now i take two tokens, how to distinguish the token whether belongs to user A or B? i've tried to get requestId but the requestId in request is different from response.
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[GitHub] [apisix-java-plugin-runner] dev-Wang commented on issue #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
Posted by GitBox <gi...@apache.org>.
dev-Wang commented on issue #217:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/217#issuecomment-1342171267
thanks, i've tried your solution. but when i called a service endpoint, an exception was throwed.
failed to receive RPC HTTP RESP CALL: unexpected type 3,client: 172.22.0.1
what do this mean?
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[GitHub] [apisix-java-plugin-runner] tzssangglass commented on issue #217: request help: how can i get custom request headers in the ext-plugin-post-resp?
Posted by GitBox <gi...@apache.org>.
tzssangglass commented on issue #217:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/217#issuecomment-1342518804
try with v.0.4.0
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