bug: POST request with body contain chinese characters exist encoding problem

[lbrant]

Issue description

Environment

apisix-java-plugin-runner version：0.2.0
apsix version：2.13.1

Minimal test code / Steps to reproduce the issue

1. Test post request contain chinese characters in OKHttp：
   {"source":"高德地图","content":"https://surl.amap.com/1PoSAsa1l4Ud","deviceId":"123456"}
2. inner OKHttp，body will be translated to utf-8 format bytes:
   Charset charset = Util.UTF_8; byte[] bytes = content.getBytes(charset);
3. Custom filter in apisix-java-plugin-runner, get request body:
   {"source":"�德��","content":"https://surl.amap.com/1PoSAsa1l4Ud","deviceId":"123456"}

[tzssangglass]

apisix-java-plugin-runner also use UTF_8 , see: https://github.com/apache/apisix-java-plugin-runner/pull/53/files

[lbrant]

@tzssangglass

I mean body in request, fixed by modifing ExtraInfoResponse.getResult:

from:

public String getResult() {
      StringBuilder builder = new StringBuilder();
       for (int i = 0; i < this.resp.resultLength(); i++) {
            builder.append((char) this.resp.result(i));
       }
       return builder.toString();
    }

to

public String getResult() {
        byte[] bytes = new byte[this.resp.resultLength()];
        for (int i = 0; i < this.resp.resultLength(); i++) {
            bytes[i] = (byte) this.resp.result(i);
        }
        return new String(bytes, StandardCharsets.UTF_8);
    }

[tzssangglass]

would you like to submit a PR to fix it?

[dargoner]

@tzssangglass

I mean body in request, fixed by modifing ExtraInfoResponse.getResult:

from:

public String getResult() {
      StringBuilder builder = new StringBuilder();
       for (int i = 0; i < this.resp.resultLength(); i++) {
            builder.append((char) this.resp.result(i));
       }
       return builder.toString();
    }

to

public String getResult() {
        byte[] bytes = new byte[this.resp.resultLength()];
        for (int i = 0; i < this.resp.resultLength(); i++) {
            bytes[i] = (byte) this.resp.result(i);
        }
        return new String(bytes, StandardCharsets.UTF_8);
    }

确实有个问题

[fitz-97]

0.4.0
Cannot be modified manually

[tzssangglass]

We can make it configurable by reading configuration from the configuration file.