Javascript callout for the Apigee Edge platform. This script will convert JSON attribute names to camelCase from hyphen-case or underscore_case and vice versa. Work remains to be done on the inbound flow.

convertJsonPropNames.js

function convertProps(obj, propNameConverterFn) {
  var r, p, thing, i, L, what = Object.prototype.toString, wo = what.call(obj);

  if (wo == "[object Object]") {
    r = {};
    for (p in obj) {
      if (obj.hasOwnProperty(p)) {
        thing = obj[p];
        if (what.call(thing) == "[object Object]" || what.call(thing) == "[object Array]") {
          r[propNameConverterFn(p)] = convertProps(thing, propNameConverterFn);
        }
        else {
          r[propNameConverterFn(p)] = thing;
        }
      }
    }
  }
  else if (wo == "[object Array]") {
    r = [];
    for (i=0, L=obj.length; i<L; ++i ) {
      thing = obj[i];
      if (what.call(thing) == "[object Object]" || what.call(thing) == "[object Array]") {
        r[i] = convertProps(thing, propNameConverterFn);
      }
      else {
        r[i] = thing;
      }
    }
  }
  else {
    var msg  = "Unknown object to covert: " + wo + "("+ JSON.stringify(obj, null, 2).slice(0, 34) +")";
    console.log(msg);
    throw {error: true, message: msg };
  }
  return r;
}


function propsToCamel(obj) {
  return convertProps(obj, toCamel);
}

function propsToDash(obj) {
  return convertProps(obj, toDash);
}

function propsToHyphen(obj) {
  return convertProps(obj, toHyphen);
}

function toCamel(str) {
  return str.replace(/([-_][a-z])/g, function($1){return $1.toUpperCase().replace(/[-_]/,'');});
}

function toDash(str) {
  return str.replace(/([A-Z])/g, function($1){return "-"+$1.toLowerCase();});
}

function toHyphen(str) {
  return str.replace(/([A-Z])/g, function($1){return "_"+toLowerCase();});
}


/* ====================================================== */

var obj, converted;

//debug
print("Flow: " + context.flow);

switch(context.flow) {
  case "PROXY_REQ_FLOW":
    // check if we're handling POST or PUT and convert accordingly
    break;
  case "PROXY_RESP_FLOW":
    // convert to camelCase
    obj = JSON.parse(response.content);
    converted = propsToCamel(obj);
    response.content = JSON.stringify(converted, null, 2);
    break;
  case "TARGET_REQ_FLOW":
    // alternate spot to handle POST or PUT - depends on other flow logic
    break;
  case "TARGET_RESP_FLOW":
    // alternate spot to handle converting to camelCase - depends on other flow logic
    break;
  default:
    // do nothing
    break;
}