Authentication

To authenticate a user from the mini-program, you must send a request with a code and user information of the mini-program to the server. To receive the code and send the request, you must use wx.login provided by mini-program API. Odoo will create a user if one does not exist and assign session_id which has to be sent via a cookie on each RPC request.:

function AuthenticateUser(code) {
  return new Promise(function(resolve, reject) {
    var userInfo = app.globalData.userInfo;
    code = code || false;
    function do_request() {
      var options = {
        url: 'https://ODOO_HOST/itp_wechat/miniprogram/authenticate',
        header: {
          'Content-Type': 'application/json'
        },
        success: function(res) {
          // save session_id
          var data = res.data.result;
          if (data.session_id) {
            wx.setStorage({
              key: 'session_id',
              data: data.session_id,
              success: function() {
                resolve(data);
              }
            })
          } else {
            reject(res);
          }
        },
        fail: function(res) {
          reject(res);
        }
      };

      var params = {
        context: {
        },
        code: code,
        user_info: userInfo
      };

      // send request to Odoo server
      wxJsonRpc(params, options);
    }

    if (code) {
      do_request();
    } else {
      wx.login({
        success: function(data) {
          code = data.code;
          do_request();
        }
      })
    }
  });
}

RPC calls

RPC request from mini-program:

function odooRpc(params, options) {
  return new Promise(function(resolve, reject){
    options = options || {
    };
    function do_request(session_id) {
      options.url = 'https://ODOO_HOST/web/dataset/call_kw';
      options.header = {
        'Content-Type': 'applications/json',
        'X-Openerp-Session-Id': session_id
      };
      options.success = function(res) {
        var data = res.data.result;
        resolve(data);
      };
      options.fail = function(res) {
        reject(res);
      };
      wxJsonRpc(params, options);
    }
    wx.getStorage({
      key: 'session_id',
      success: function(res) {
        if (res.data) {
          do_request(res.data);
        } else {
          AuthenticateUser().then(function(data){
            do_request(data.session_id);
          });
        }
      },
      fail: function() {
        AuthenticateUser().then(function(data){
          do_request(data.session_id);
        });
      },
    });
  });
}

function wxJsonRpc(params, options) {
   var data = {
      "jsonrpc": "2.0",
      "method": "call",
      "params": params,
      "id": Math.floor(Math.random() * 1000 * 1000 * 1000),
   }
   options.data = JSON.stringify(data);
   options.dataType = 'json';
   options.method = 'POST';
   // send request to Odoo server
   wx.request(options);
}

Example: Load Products from Odoo Server:

var params = {
  models: 'product.product',
  method: 'search_read',
  args: [
  ],
  context: {
  },
  kwargs: {
    domain: [['sale_ok','=',true],['available_in_pos','=',true]],
    fields: ['display_name', 'list_price', 'lst_price', 'standard_price', 'categ_id', 'pos_categ_id', 'taxes_id',
            'barcode', 'default_code', 'to_weight', 'uom_id', 'description_sale', 'description',
            'product_tmpl_id','tracking'],
  }
}

odooRpc(params).then(function(res) {
  console.log(res);
});

Result: list of Products