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'use strict';
 
var utils = require('./utils');
 
var PROTECTION_PREFIX = /^\)\]\}',?\n/;
var DEFAULT_CONTENT_TYPE = {
  'Content-Type': 'application/x-www-form-urlencoded'
};
 
module.exports = {
  transformRequest: [function transformRequest(data, headers) {
    if (utils.isFormData(data) || utils.isArrayBuffer(data) || utils.isStream(data)) {
      return data;
    }
    if (utils.isArrayBufferView(data)) {
      return data.buffer;
    }
    if (utils.isObject(data) && !utils.isFile(data) && !utils.isBlob(data)) {
      // Set application/json if no Content-Type has been specified
      if (!utils.isUndefined(headers)) {
        utils.forEach(headers, function processContentTypeHeader(val, key) {
          if (key.toLowerCase() === 'content-type') {
            headers['Content-Type'] = val;
          }
        });
 
        if (utils.isUndefined(headers['Content-Type'])) {
          headers['Content-Type'] = 'application/json;charset=utf-8';
        }
      }
      return JSON.stringify(data);
    }
    return data;
  }],
 
  transformResponse: [function transformResponse(data) {
    /*eslint no-param-reassign:0*/
    if (typeof data === 'string') {
      data = data.replace(PROTECTION_PREFIX, '');
      try {
        data = JSON.parse(data);
      } catch (e) { /* Ignore */ }
    }
    return data;
  }],
 
  headers: {
    common: {
      'Accept': 'application/json, text/plain, */*'
    },
    patch: utils.merge(DEFAULT_CONTENT_TYPE),
    post: utils.merge(DEFAULT_CONTENT_TYPE),
    put: utils.merge(DEFAULT_CONTENT_TYPE)
  },
 
  timeout: 0,
 
  xsrfCookieName: 'XSRF-TOKEN',
  xsrfHeaderName: 'X-XSRF-TOKEN',
 
  maxContentLength: -1,
 
  validateStatus: function validateStatus(status) {
    return status >= 200 && status < 300;
  }
};