ocr-file-upload failed on ubuntu & aws ec2 when running outside

[EvgenyKislyy]

If i run inside the ubuntu instance it works fine
docs/upload-local-file.sh http://localhost:9292/ocr-file-upload ocrimage

if i run it outside (from the internet)
./upload-local-file.sh http://xxx.xx.xx.xx:9292/ocr-file-upload ocrimage.png

I see

sh-3.2# ./upload-local-file.sh http://100.24.24.203:9292/ocr-file-upload ocrimage.png 
Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying 100.24.24.203...
* TCP_NODELAY set
* Connected to 100.24.24.203 (100.24.24.203) port 9292 (#0)
> POST /ocr-file-upload HTTP/1.1
> Host: 100.24.24.203:9292
> User-Agent: curl/7.54.0
> Accept: */*
> Content-Type: multipart/related; boundary="d2649535728a8d270eb98fd5d8a8412f"
> Content-Length: 59595
> Expect: 100-continue
> 
< HTTP/1.1 100 Continue
* We are completely uploaded and fine
* Empty reply from server
* Connection #0 to host 100.24.24.203 left intact
curl: (52) Empty reply from server

And in the server logs i see

13:29:32.660526 OCR_HTTP: request to ocr-file-upload
13:29:32.660550 OCR_HTTP: content type: multipart/related; boundary="d2649535728a8d270eb98fd5d8a8412f"
13:29:32.660562 OCR_HTTP: content type: multipart/related
2018/11/12 13:29:33 http: panic serving 93.76.243.43:62112: runtime error: invalid memory address or nil pointer dereference
goroutine 5 [running]:
net/http.(*conn).serve.func1(0xc82005a380)
	/usr/lib/go-1.6/src/net/http/server.go:1389 +0xc1
panic(0x7f0a60, 0xc82000e080)
	/usr/lib/go-1.6/src/runtime/panic.go:443 +0x4e9
github.com/tleyden/open-ocr.(*OcrHttpMultipartHandler).extractParts(0xc82000a690, 0xc8200d6000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/opt/go/src/github.com/tleyden/open-ocr/ocr_http_multipart_handler.go:52 +0xa7f
github.com/tleyden/open-ocr.(*OcrHttpMultipartHandler).ServeHTTP(0xc82000a690, 0x7f236dc65b30, 0xc820059ad0, 0xc8200d6000)
	/opt/go/src/github.com/tleyden/open-ocr/ocr_http_multipart_handler.go:94 +0x97
net/http.(*ServeMux).ServeHTTP(0xc820056ab0, 0x7f236dc65b30, 0xc820059ad0, 0xc8200d6000)
	/usr/lib/go-1.6/src/net/http/server.go:1910 +0x17d
net/http.serverHandler.ServeHTTP(0xc82005a300, 0x7f236dc65b30, 0xc820059ad0, 0xc8200d6000)
	/usr/lib/go-1.6/src/net/http/server.go:2081 +0x19e
net/http.(*conn).serve(0xc82005a380)
	/usr/lib/go-1.6/src/net/http/server.go:1472 +0xf2e
created by net/http.(*Server).Serve
	/usr/lib/go-1.6/src/net/http/server.go:2137 +0x44e

Could you please help me how to fix it?

[tleyden]

Thanks for the issue report. Nothing obvious jumps out at me ..

[tleyden]

Have you tried using https://github.com/tleyden/open-ocr/blob/master/docs/upload-local-file.py? If that worked, it might tell us something.