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nachfren
Asked: 2020-01-15 01:05:03 +0800 CST 2020-01-15 01:05:03 +0800 CST

Json inside another, POST request arrives empty

  • 772

I have a program that queries a REST service in python, and the Java server that processes the requests.

python

import requests
import json

from requests.auth import HTTPBasicAuth

headers={'Content-type':'application/json', 'Accept':'application/json'}
#Parametros peticion
parametros={
    "llamada":"S", 
    "backup":{
        "fecha":"2019-11-14T00:00:00",
        "codigo":"1W78-55155W8S"
        },
    "usuario":"MK001"
    }


r = requests.post(
    'http://localhost:8080/appapi/calculo/eje1',
    data=json.dumps(parametros),
    auth=HTTPBasicAuth('user', 'pass'),
    headers=headers
)

In the Java part:

@POST
@Path("/eje1")
@Consumes(MediaType.APPLICATION_JSON)
public Response setCalc(HashMap<String,String> object) {
    System.out.println(object);
    return Response.status(200).entity("").build();
}

When we execute the JSON

parametros={
"llamada":"S", 
"backup":{
    "fecha":"2019-11-14T00:00:00",
    "codigo":"1W78-55155W8S"
    },
"usuario":"MK001"
}

The parameters that come with a value are only llamadaand usuario, but backupit comes to me empty.

Do you know how to mount that particular Json? I can't modify the Java part.

java

2 Answers

  1. Best Answer

    In java the terms Map -> JSON are very confusing. I don't recommend you do that. You should transform it into an object using mapping or into a String, since you want to work in an open way and without being influenced by the model, I recommend the org.json library

    https://www.baeldung.com/java-org-json

    @POST
@Path("/eje1")
@Consumes(MediaType.APPLICATION_JSON)
public Response setCalc(String json) {
    System.out.println(json);
    JSONObject obj = new JSONObject(json);
    //Con este objecto ya podrias trabajar
    System.out.println(json.toString());

    return Response.status(200).entity("").build();
}

    EDITION:

    For the python part put a string of String, instead of the object, but then in the back of java you will have to reparse it.

    import requests
import json

from requests.auth import HTTPBasicAuth

headers={'Content-type':'application/json', 'Accept':'application/json'}
#Parametros peticion
parametros={
    "llamada":"S", 
    "backup":"{\"fecha\":\"2019-11-14T00:00:00\",\"codigo":\"1W78-55155W8S\"}",
    "usuario":"MK001"
    }


r = requests.post(
    'http://localhost:8080/appapi/calculo/eje1',
    data=json.dumps(parametros),
    auth=HTTPBasicAuth('user', 'pass'),
    headers=headers
)
    • 1

  2. If you can't modify the Java part, modify the data to match something digestible by that controller. Flatten the JSON, for example (only one level deep is supported):

    parametros={
    "llamada":"S", 
    "backup-fecha":"2019-11-14T00:00:00",
    "backup-codigo":"1W78-55155W8S",
    "usuario":"MK001"
}
    • 1