85 lines
2.1 KiB
JavaScript
85 lines
2.1 KiB
JavaScript
var StructuredReceiver = require("./receiver_structured_0_2.js");
|
|
var BinaryReceiver = require("./receiver_binary_0_2.js");
|
|
|
|
const Constants = require("./constants.js");
|
|
const Commons = require("./commons.js");
|
|
|
|
const structured = "structured";
|
|
const binary = "binary";
|
|
|
|
const receiverByBinding = {
|
|
structured : new StructuredReceiver(),
|
|
binary : new BinaryReceiver(),
|
|
};
|
|
|
|
const allowedBinaryContentTypes = [];
|
|
allowedBinaryContentTypes.push(Constants.MIME_JSON);
|
|
allowedBinaryContentTypes.push(Constants.MIME_OCTET_STREAM);
|
|
|
|
const allowedStructuredContentTypes = [];
|
|
allowedStructuredContentTypes.push(Constants.MIME_CE_JSON);
|
|
|
|
function validateArgs(payload, headers) {
|
|
if(!payload){
|
|
throw {message: "payload is null or undefined"};
|
|
}
|
|
|
|
if(!headers){
|
|
throw {message: "headers is null or undefined"};
|
|
}
|
|
}
|
|
|
|
// Is it binary or structured?
|
|
function resolveBindingName(payload, headers) {
|
|
|
|
var contentType =
|
|
Commons.sanityContentType(headers[Constants.HEADER_CONTENT_TYPE]);
|
|
|
|
if(contentType.startsWith(Constants.MIME_CE)){
|
|
// Structured
|
|
if(allowedStructuredContentTypes.includes(contentType)){
|
|
return structured;
|
|
} else {
|
|
throw {message: "structured+type not allowed", errors: [contentType]};
|
|
}
|
|
} else {
|
|
// Binary
|
|
if(allowedBinaryContentTypes.includes(contentType)){
|
|
return binary;
|
|
} else {
|
|
throw {message: "content type not allowed", errors : [contentType]};
|
|
}
|
|
}
|
|
}
|
|
|
|
var Unmarshaller = function() {
|
|
|
|
};
|
|
|
|
Unmarshaller.prototype.unmarshall = function(payload, headers) {
|
|
return new Promise((resolve, reject) => {
|
|
try {
|
|
validateArgs(payload, headers);
|
|
|
|
var sanityHeaders = Commons.sanityAndClone(headers);
|
|
|
|
// Validation level 1
|
|
if(!sanityHeaders[Constants.HEADER_CONTENT_TYPE]){
|
|
throw {message: "content-type header not found"};
|
|
}
|
|
|
|
// Resolve the binding
|
|
var bindingName = resolveBindingName(payload, sanityHeaders);
|
|
|
|
var cloudevent =
|
|
receiverByBinding[bindingName].parse(payload, sanityHeaders);
|
|
|
|
resolve(cloudevent);
|
|
}catch(e){
|
|
reject(e);
|
|
}
|
|
});
|
|
};
|
|
|
|
module.exports = Unmarshaller;
|