PharmaLedger-IMI/epi-workspace#806 get bdnsHosts from github repo at …

…boot

components/bdns/index.js

@@ -15,11 +15,20 @@ function BDNS(server) {
     const {headersMiddleware} = require('../../utils/middlewares');
 
     let bdnsCache;
+    const config = require("../../config");
+    const bdnsConfig = config.getConfig("componentsConfig", "bdns");
+
+    async function getBDNSHostsFromURL(url) {
+        const http = require("opendsu").loadAPI("http");
+        const bdnsHosts = await http.fetch(url).then(res => res.json());
+        return bdnsHosts
+    }
 
     let init_process_runned = false;
-    async function initialize(){
-        if(init_process_runned){
-           return true;
+
+    async function initialize() {
+        if (init_process_runned) {
+            return true;
         }
         init_process_runned = true;
         const fs = require("fs");
@@ -29,16 +38,27 @@ function BDNS(server) {
 
         bdnsCache = fs.readFileSync(bdnsHostsPath).toString();
 
-        try{
+        if (bdnsConfig && bdnsConfig.url) {
+            try {
+                const bdnsExtensions = await getBDNSHostsFromURL(bdnsConfig.url);
+                let newRegistry = JSON.parse(bdnsCache);
+                Object.assign(newRegistry, bdnsExtensions);
+                bdnsCache = JSON.stringify(newRegistry);
+            } catch (e) {
+                console.log(`Failed to get bdns hosts from url`, e);
+            }
+        }
+
+        try {
             console.log("Testing to see if admin component is active and can be used to expand BDNS configuration.");
             let adminService = require("./../admin").getAdminService();
             let getDomains = $$.promisify(adminService.getDomains);
             let domains = await getDomains();
-            if(domains){
+            if (domains) {
                 let bdnsExtensions = {};
-                for(let i=0; i<domains.length; i++){
+                for (let i = 0; i < domains.length; i++) {
                     let domain = domains[i];
-                    if(domain.active){
+                    if (domain.active) {
                         bdnsExtensions[domain.name] = DOMAIN_TEMPLATE;
                     }
                 }
@@ -47,7 +67,7 @@ function BDNS(server) {
                 bdnsCache = JSON.stringify(newRegistry);
             }
             console.log("BDNS configuration was updated accordingly to information retrieved from admin service");
-        }catch(err){
+        } catch (err) {
             console.info("Admin service not available, skipping the process of loading dynamic configured domains. This is not a problem, it's a configuration.");
         }
     }
@@ -64,7 +84,7 @@ function BDNS(server) {
             response.setHeader('content-type', 'application/json');
             response.statusCode = 200;
             response.end(bdnsCache);
-        }else{
+        } else {
             console.log("Bdns config not available at this moment. A 404 response will be sent.");
             response.statusCode = 404;
             return response.end('BDNS hosts not found');