cant proxy/process file uploads/downloads via hydra-router

[leonavevor]

SUMMERY: cant proxy/process file uploads/downloads to or from backend services via hydra-router.

upload

POST postman (file) -->> hydra-router -->> backend-service

backend-service does not receive the upload file from hydra but when I hit the backend-service directly it works perfectly

download (get file)

GET postman (filename) -->> hydra-router -->> backend-service

backend-service receive the request, processes/return the result (confirmed by tracing), but hydra-router for some reason cant forward file to the client.

HYDRA-ROUTER CONFIGURATION FILE: { "externalRoutes": {}, "routerToken": "", "disableRouterEndpoint": false, "debugLogging": true, "queuerDB": 0, "requestTimeout": 300, "forceMessageSignature": false, "signatureSharedSecret": "**", "cors": { "access-control-allow-origin": "*", "access-control-allow-methods": "GET, POST, PUT, DELETE, OPTIONS", "access-control-allow-headers": "accept, authorization, cache-control, content-type, x-requested-with", "access-control-allow-credentials": "true", "access-control-Max-Age": 10 }, "hydra": { "serviceName": "hydra-router", "serviceDescription": "Service Router", "serviceIP": "", "servicePort": "5353", "serviceType": "router", "plugins": { "logger": { "logRequests": true, "redact": [ "password" ] }, "hydraLogger": { "logToConsole": true, "onlyLogLocally": false }, "dontuse-logger": { "logRequests": false, "noFile": true, "toConsole": false, "redact": [ "password" ], "elasticsearch": { "rotate": "daily", "host": "host", "port": 9200, "index": "hydra" } }, "dontuse-loggly": { "method": "POST", "protocol": "http", "hostname": "logs-01.loggly.com", "port": 80, "path": "/inputs/{token-here}/tag/http/", "logToConsole": true, "onlyLogLocally": false } }, "redis": { "url": "redis://127.0.0.1:6379/15" } } }

BACKEND-SERVICE CODE SNIPPET:

galleryServiceRouter.get("/images/:filename", [cache('5 minutes')], async function (req, res) {

  console.log("getting image: " + req.params.filename);

  let image = await Image.findOne({
        filename: req.params.filename
  });

  if (!image) {
        res.status(400).json({
              error: "Couldnt find image with that filename"
        });
  } else {
        res.writeHead(200, {
              "Content-Type": "image/png"
        });
        res.end(image.data);
        console.log("found image: " + req.params.filename);
  }

});

LOG FROM H-ROUTER: 1611308775 INFO hydra-router | {"tracer":"HR: tracer=2ad5pg2nkaf","url":"/api/v1/gallery-service/images/1a7cdd8f-581f-491a-a8cf-772c76d58f73_large.png","method":"GET","callerIP":"::1","body":{},"host":"localhost:5353","userAgent":"PostmanRuntime/7.26.8"} 1611308775 INFO hydra-router | HR: [2ad5pg2nkaf] Request for http://localhost:5353/api/v1/gallery-service/images/1a7cdd8f-581f-491a-a8cf-772c76d58f73_large.png
1611308775 INFO hydra-router | HR: [2ad5pg2nkaf] Calling remote service {"to":"gallery-service:[get]/api/v1/gallery-service/images/1a7cdd8f-581f-491a-a8cf-772c76d58f73_large.png","from":"aa482ad9b2a5469e99f856edc4d2194f@hydra-router:/","headers":{"user-agent":"PostmanRuntime/7.26.8","accept":"/","postman-token":"275ebdae-5619-44b4-a4e0-2633afe9e130","host":"localhost:5353","connection":"keep-alive","x-hydra-tracer":"2ad5pg2nkaf"},"mid":"8f93c9f6-1e90-407f-a2a5-2390f723aeeb-2ad5pg2nkaf","timestamp":"2021-01-22T09:46:15.784Z","version":"UMF/1.4.6","body":{}} 1611308775 INFO hydra-router | {"to":"gallery-service:[get]/api/v1/gallery-service/images/1a7cdd8f-581f-491a-a8cf-772c76d58f73_large.png","from":"aa482ad9b2a5469e99f856edc4d2194f@hydra-router:/","headers":{"user-agent":"PostmanRuntime/7.26.8","accept":"/","postman-token":"275ebdae-5619-44b4-a4e0-2633afe9e130","host":"localhost:5353","connection":"keep-alive","x-hydra-tracer":"2ad5pg2nkaf"},"mid":"8f93c9f6-1e90-407f-a2a5-2390f723aeeb-2ad5pg2nkaf","timestamp":"2021-01-22T09:46:15.784Z","version":"UMF/1.4.6","body":{}}

LOG FROM BACKEND-SERVICE: getting image: 1a7cdd8f-581f-491a-a8cf-772c76d58f73_large.png found image: 1a7cdd8f-581f-491a-a8cf-772c76d58f73_large.png

NB: returns image with all relevant headers NB: ends response

QUESTION: when I hit the backend-service directly it works perfectly. Is there a simple way to get around this problem? or how can it be resolved?