yujinchoi-94 opened a new issue, #251:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/251
### Issue description
I'm accessing Accept header value in filter and postFilter method.
Here's what I've experienced.
1. the client sends accept value as ` `(blank)
2. In the filter method, set accept value, for example
`application/xml;charset=euc-kr`, to call an upstream server with that accept
header value.
3. In the post filter method, access accept header value. and It turns out
`application/xml;charset=euc-kr` not a ` `(blank)
It only happens when the client send accept header is ` `
Here's my code
```java
@Override
public void filter(HttpRequest request, HttpResponse response,
PluginFilterChain chain) {
var config = getConfig(request.getConfig(this),
ContentTypeConverterFilterConfig.class);
request.setHeader(HTTP_HEADER_ACCEPT, config.getUpstreamAccept());
// config.getUpstreamAccept() is `application/xml;charset=euc-kr`
request.setHeader(HTTP_OPENAPI_ORIGINAL_HEADER_ACCEPT,
getNonBlankHeaderValue(request.getVars(NginxVars.HTTP_ACCEPT.getValue()))); //
I have to add another header value so that I can client send accept header
value in postFilter method
chain.filter(request, response);
}
@Override
public void postFilter(PostRequest request, PostResponse response,
PluginFilterChain chain) {
...
request.getVars(NginxVars.HTTP_ACCEPT.getValue()) // not a client send
accept header value (` `)
...
}
public enum NginxVars {
HTTP_ACCEPT("http_accept"),
REQUEST_URI("request_uri");
...
```
### Environment
0.4.0
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