cloudevents
Version:
CloudEvents SDK for JavaScript
149 lines (148 loc) • 9.36 kB
JavaScript
"use strict";
/*
Copyright 2021 The CloudEvents Authors
SPDX-License-Identifier: Apache-2.0
*/
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.v03structuredParsers = exports.v03binaryParsers = exports.v03headerMap = exports.v1structuredParsers = exports.v1binaryParsers = exports.v1headerMap = exports.sanitize = exports.headersFor = exports.requiredHeaders = exports.allowedContentTypes = void 0;
const parsers_1 = require("../../parsers");
const cloudevent_1 = require("../../event/cloudevent");
const constants_1 = __importDefault(require("../../constants"));
exports.allowedContentTypes = [constants_1.default.DEFAULT_CONTENT_TYPE, constants_1.default.MIME_JSON, constants_1.default.MIME_OCTET_STREAM];
exports.requiredHeaders = [
constants_1.default.CE_HEADERS.ID,
constants_1.default.CE_HEADERS.SOURCE,
constants_1.default.CE_HEADERS.TYPE,
constants_1.default.CE_HEADERS.SPEC_VERSION,
];
/**
* Returns the HTTP headers that will be sent for this event when the HTTP transmission
* mode is "binary". Events sent over HTTP in structured mode only have a single CE header
* and that is "ce-id", corresponding to the event ID.
* @param {CloudEvent} event a CloudEvent
* @returns {Object} the headers that will be sent for the event
*/
function headersFor(event) {
const headers = {};
let headerMap;
if (event.specversion === cloudevent_1.V1) {
headerMap = exports.v1headerMap;
}
else {
headerMap = exports.v03headerMap;
}
// iterate over the event properties - generate a header for each
Object.getOwnPropertyNames(event).forEach((property) => {
const value = event[property];
if (value !== undefined) {
const map = headerMap[property];
if (map) {
headers[map.name] = map.parser.parse(value);
}
else if (property !== constants_1.default.DATA_ATTRIBUTE && property !== `${constants_1.default.DATA_ATTRIBUTE}_base64`) {
headers[`${constants_1.default.EXTENSIONS_PREFIX}${property}`] = value;
}
}
});
// Treat time specially, since it's handled with getters and setters in CloudEvent
if (event.time) {
headers[constants_1.default.CE_HEADERS.TIME] = new Date(event.time).toISOString();
}
return headers;
}
exports.headersFor = headersFor;
/**
* Sanitizes incoming headers by lowercasing them and potentially removing
* encoding from the content-type header.
* @param {Headers} headers HTTP headers as key/value pairs
* @returns {Headers} the sanitized headers
*/
function sanitize(headers) {
const sanitized = {};
Array.from(Object.keys(headers))
.filter((header) => Object.hasOwnProperty.call(headers, header))
.forEach((header) => (sanitized[header.toLowerCase()] = headers[header]));
return sanitized;
}
exports.sanitize = sanitize;
function parser(name, parser = new parsers_1.PassThroughParser()) {
return { name: name, parser: parser };
}
/**
* A utility Map used to retrieve the header names for a CloudEvent
* using the CloudEvent getter function.
*/
exports.v1headerMap = Object.freeze({
[]: parser(constants_1.default.HEADER_CONTENT_TYPE),
[]: parser(constants_1.default.CE_HEADERS.SUBJECT),
[]: parser(constants_1.default.CE_HEADERS.TYPE),
[]: parser(constants_1.default.CE_HEADERS.SPEC_VERSION),
[]: parser(constants_1.default.CE_HEADERS.SOURCE),
[]: parser(constants_1.default.CE_HEADERS.ID),
[]: parser(constants_1.default.CE_HEADERS.TIME),
[]: parser(constants_1.default.BINARY_HEADERS_1.DATA_SCHEMA),
});
exports.v1binaryParsers = Object.freeze({
[]: parser(constants_1.default.CE_ATTRIBUTES.TYPE),
[]: parser(constants_1.default.CE_ATTRIBUTES.SPEC_VERSION),
[]: parser(constants_1.default.CE_ATTRIBUTES.SOURCE),
[]: parser(constants_1.default.CE_ATTRIBUTES.ID),
[]: parser(constants_1.default.CE_ATTRIBUTES.TIME, new parsers_1.DateParser()),
[]: parser(constants_1.default.STRUCTURED_ATTRS_1.DATA_SCHEMA),
[]: parser(constants_1.default.CE_ATTRIBUTES.SUBJECT),
[]: parser(constants_1.default.CE_ATTRIBUTES.CONTENT_TYPE),
[]: parser(constants_1.default.CE_ATTRIBUTES.CONTENT_TYPE),
});
exports.v1structuredParsers = Object.freeze({
[]: parser(constants_1.default.CE_ATTRIBUTES.TYPE),
[]: parser(constants_1.default.CE_ATTRIBUTES.SPEC_VERSION),
[]: parser(constants_1.default.CE_ATTRIBUTES.SOURCE),
[]: parser(constants_1.default.CE_ATTRIBUTES.ID),
[]: parser(constants_1.default.CE_ATTRIBUTES.TIME, new parsers_1.DateParser()),
[]: parser(constants_1.default.STRUCTURED_ATTRS_1.DATA_SCHEMA),
[]: parser(constants_1.default.CE_ATTRIBUTES.CONTENT_TYPE),
[]: parser(constants_1.default.CE_ATTRIBUTES.SUBJECT),
[]: parser(constants_1.default.CE_ATTRIBUTES.DATA),
[]: parser(constants_1.default.STRUCTURED_ATTRS_1.DATA_BASE64),
});
/**
* A utility Map used to retrieve the header names for a CloudEvent
* using the CloudEvent getter function.
*/
exports.v03headerMap = Object.freeze({
[]: parser(constants_1.default.HEADER_CONTENT_TYPE),
[]: parser(constants_1.default.CE_HEADERS.SUBJECT),
[]: parser(constants_1.default.CE_HEADERS.TYPE),
[]: parser(constants_1.default.CE_HEADERS.SPEC_VERSION),
[]: parser(constants_1.default.CE_HEADERS.SOURCE),
[]: parser(constants_1.default.CE_HEADERS.ID),
[]: parser(constants_1.default.CE_HEADERS.TIME),
[]: parser(constants_1.default.BINARY_HEADERS_03.CONTENT_ENCODING),
[]: parser(constants_1.default.BINARY_HEADERS_03.SCHEMA_URL),
});
exports.v03binaryParsers = Object.freeze({
[]: parser(constants_1.default.CE_ATTRIBUTES.TYPE),
[]: parser(constants_1.default.CE_ATTRIBUTES.SPEC_VERSION),
[]: parser(constants_1.default.CE_ATTRIBUTES.SOURCE),
[]: parser(constants_1.default.CE_ATTRIBUTES.ID),
[]: parser(constants_1.default.CE_ATTRIBUTES.TIME, new parsers_1.DateParser()),
[]: parser(constants_1.default.STRUCTURED_ATTRS_03.SCHEMA_URL),
[]: parser(constants_1.default.CE_ATTRIBUTES.SUBJECT),
[]: parser(constants_1.default.STRUCTURED_ATTRS_03.CONTENT_ENCODING),
[]: parser(constants_1.default.CE_ATTRIBUTES.CONTENT_TYPE),
});
exports.v03structuredParsers = Object.freeze({
[]: parser(constants_1.default.CE_ATTRIBUTES.TYPE),
[]: parser(constants_1.default.CE_ATTRIBUTES.SPEC_VERSION),
[]: parser(constants_1.default.CE_ATTRIBUTES.SOURCE),
[]: parser(constants_1.default.CE_ATTRIBUTES.ID),
[]: parser(constants_1.default.CE_ATTRIBUTES.TIME, new parsers_1.DateParser()),
[]: parser(constants_1.default.STRUCTURED_ATTRS_03.SCHEMA_URL),
[]: parser(constants_1.default.STRUCTURED_ATTRS_03.CONTENT_ENCODING),
[]: parser(constants_1.default.CE_ATTRIBUTES.CONTENT_TYPE),
[]: parser(constants_1.default.CE_ATTRIBUTES.SUBJECT),
[]: parser(constants_1.default.CE_ATTRIBUTES.DATA),
});