76 lines
1.9 KiB
JavaScript
76 lines
1.9 KiB
JavaScript
var StructuredReceiver = require("./receiver_structured_0_2.js");
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var BinaryReceiver = require("./receiver_binary_0_2.js");
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const Constants = require("./constants.js");
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const Commons = require("./commons.js");
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const structured = "structured";
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const binary = "binary";
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const receiver_by_binding = {
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structured : new StructuredReceiver(),
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binary : new BinaryReceiver(),
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};
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const allowed_binary_content_types = [];
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allowed_binary_content_types.push(Constants.MIME_JSON);
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const allowed_structured_content_types = [];
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allowed_structured_content_types.push(Constants.MIME_CE_JSON);
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function validate_args(payload, headers) {
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if(!payload){
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throw {message: "payload is null or undefined"};
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}
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if(!headers){
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throw {message: "headers is null or undefined"};
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}
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}
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// Is it binary or structured?
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function resolve_binding_name(payload, headers) {
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var contentType = headers[Constants.HEADER_CONTENT_TYPE];
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if(contentType.startsWith(Constants.MIME_CE)){
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// Structured
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if(allowed_structured_content_types.includes(contentType)){
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return structured;
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} else {
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throw {message: "structured+type not allowed", errors: [contentType]};
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}
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} else {
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// Binary
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if(allowed_binary_content_types.includes(contentType)){
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return binary;
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} else {
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throw {message: "content type not allowed", errors : [contentType]};
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}
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}
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}
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var Unmarshaller = function() {
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}
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Unmarshaller.prototype.unmarshall = function(payload, headers) {
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validate_args(payload, headers);
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var sanity_headers = Commons.sanity_and_clone(headers);
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// Validation level 1
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if(!sanity_headers[Constants.HEADER_CONTENT_TYPE]){
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throw {message: "content-type header not found"};
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}
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// Resolve the binding
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var binding_name = resolve_binding_name(payload, sanity_headers);
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var cloudevent =
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receiver_by_binding[binding_name].parse(payload, sanity_headers);
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return cloudevent;
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}
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module.exports = Unmarshaller;
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