sdk-javascript/lib/bindings/http/receiver_structured_0_2.js

70 lines
1.8 KiB
JavaScript

const Constants = require("./constants.js");
const Commons = require("./commons.js");
const Cloudevent = require("../../cloudevent.js");
const Spec02 = require("../../specs/spec_0_2.js");
var JSONParser = require("../../formats/json/parser.js");
const spec02 = new Spec02();
const jsonParserSpec02 = new JSONParser();
const parser_by_mime = {};
parser_by_mime[Constants.MIME_JSON] = jsonParserSpec02;
parser_by_mime[Constants.MIME_CE_JSON] = jsonParserSpec02;
const allowed_content_types = [];
allowed_content_types.push(Constants.MIME_CE_JSON);
function validate_args(payload, attributes) {
if(!payload){
throw {message: "payload is null or undefined"};
}
if(!attributes) {
throw {message: "attributes is null or undefined"};
}
if((typeof payload) !== "object" && (typeof payload) !== "string"){
throw {message: "payload must be an object or string",
erros: [typeof payload]};
}
}
function Receiver(configuration) {
}
Receiver.prototype.check = function(payload, headers) {
validate_args(payload, headers);
var sanity_headers = Commons.sanity_and_clone(headers);
// Validation Level 1
if(!allowed_content_types
.includes(sanity_headers[Constants.HEADER_CONTENT_TYPE])){
throw {message: "invalid content type",
errors: [sanity_headers[Constants.HEADER_CONTENT_TYPE]]};
}
// No erros! Its contains the minimum required attributes
}
Receiver.prototype.parse = function(payload, headers) {
this.check(payload, headers);
var sanity_headers = Commons.sanity_and_clone(headers);
var contentType = sanity_headers[Constants.HEADER_CONTENT_TYPE];
var parser = parser_by_mime[contentType];
var cloudevent = parser.parse(payload);
// Must follow the spec
spec02.check(cloudevent);
return cloudevent;
}
module.exports = Receiver;