[I] [Bug] [Http Source Connector v2] Post request with `application/json` body doesn't work for paging Because of paging info was set as `params` which add header `application/x-www-form-urlencoded` [seatunnel]

[via GitHub]

chenliejun opened a new issue, #8431:
URL: https://github.com/apache/seatunnel/issues/8431

   ### Search before asking
   
   - [X] I had searched in the 
[issues](https://github.com/apache/seatunnel/issues?q=is%3Aissue+label%3A%22bug%22)
 and found no similar issues.
   
   
   ### What happened
   
   I want to pull data from http via post request with body and paging like:
   {
    "pageIndex":1,
     "pageSize":10,
     "condition":{
       "groupOp":"and",
       "rules":[{
         "field":"HTLX",
         "op":"li",
         "data":"xxx"
         }
       ]
     }
   }
   
   the `pageIndex` as the pageing.page_field to increment auto,as:1,2,3...
   
   with the conf below got Content type 
'application/x-www-form-urlencoded;charset=UTF-8' not supported，Because the 
server only support `application/json` as request body.
   
   I review the Seatunnel dev branch source code ,And find the paging info has 
been treated as request params （UrlEncodedFormEntity）which add header 
“Content-Type ：application/x-www-form-urlencoded;charset=UTF-8” 
   
   ### SeaTunnel Version
   
   2.3.8
   
   ### SeaTunnel Config
   
   ```conf
   env {
     parallelism = 1
     job.mode = "BATCH"
     job.name = "chen_http_json"
     checkpoint.interval = 10000
   }
   
   source {
     Http {
       result_table_name = "step1"
       plugin_output = "http"
       url = "http://10.24.73.96/api/query/httpsjon";
       method = "POST"
       format = "json"
       headers = {
         "Authorization":"Bearer 
eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1aWQiOiI0MGRkOWE4NmQ1OGNkMjNjMjgwOTNlMzY5NTE0MGJhNiIsIm5hbWUiOiJjaGVuIiwic2VjcmVjeUxldmVsIjozLCJyb2xlIjoibGVhZGVyIiwianRpIjoiQjZCODgyNUFFNDExNDFGOUJGRTczRDZEOTZFMUNFMDIiLCJpc3MiOiJjaGVuIiwiZXhwIjoxNzM0NTczNjM0LCJuYmYiOjE3MzQ1NzAwMzR9.xBi-5djUCz3o0T1na9RxKJN32MXIXQ2mkPReUIl5UDA"
       }
       body = 
"{\"pageIndex\":\"${pageIndex}\",\"pageSize\":10,\"condition\":{\"groupOp\":\"and\",\"rules\":[{\"field\":\"HTLX\",\"op\":\"li\",\"data\":\"合同\"}]}}"
       content_field = "$.data.list.*"
       pageing={
          page_field = pageIndex
          start_page_number = 2
          batch_size = 10
       }
       schema = {
         fields {
           HTID = string
           KHID = string
           HTLX = string
           ZCRQ = timestamp
           SFYJJH = string
         }
       }
     }
   }
   
   sink {
     Jdbc {
         source_table_name = "step1"
         url = 
"jdbc:mysql://xxxx:3307/chen_test?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&allowPublicKeyRetrieval=true&useSSL=false"
         driver = "com.mysql.cj.jdbc.Driver"    
         max_retries = 0
         user = "root"
         password = "xxxx"
         generate_sink_sql = true
         database = chen_test
         table = new_slsj
       }
   }
   ```
   
   
   ### Running Command
   
   ```shell
   seatunnel.sh -c $SEATUNNEL_HOME/scripts/chen_http_json.conf -n chen_http_json
   ```
   
   
   ### Error Exception
   
   ```log
   the http server shows: ERROR [xxx]-Content type 
'application/x-www-form-urlencoded;charset=UTF-8' not supported
   ```
   
   
   ### Zeta or Flink or Spark Version
   
   Zeta
   
   ### Java or Scala Version
   
   Java 17
   
   ### Screenshots
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [ ] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: commits-unsubscr...@seatunnel.apache.org.apache.org

For queries about this service, please contact Infrastructure at:
us...@infra.apache.org