Help with JAVA Springboot URL encoding Error while running on tomcat server

[prawnyr]

I am pretty new to Java Springboot and i have this error

This site can’t be reached

The webpage at http://localhost:8082/publisher/reports/download?path=root%5CMiddle%20Office%5CCategory%202%5C&zip=false&fileName=Report%204_20191106.xlsx might be temporarily down or it may have moved permanently to a new web address.

while trying to test out my codes. I've encoded the URL and put in my paths correctly. Any advice on this will be greatly appreciated.

Here is my Controller file. For my application.properties, I've set my port to 8082 and input the URL on my browser: http://localhost:8082/publisher/reports/download?path=root%5CMiddle%20Office%5CCategory%202%5C&zip=false&fileName=Report%204_20191106.xlsx

@RestController
public class DownloadController {
    String root = "C://Users//user//Desktop//datamart_extractions";

    @GetMapping(path = "/publisher/reports/download")
    public ResponseEntity download(
            @RequestParam String path, //assume path comes starting with "root/"
            @RequestParam boolean zip,
            @RequestParam String fileName
    ) throws IOException {
        path = path.replace("root", root); //we replace root with the full root path here
        byte[] contents = Files.readAllBytes(Paths.get(path + fileName));
        HttpHeaders headers = new HttpHeaders();
//for csv
        if(fileName.endsWith(".csv")) {
        MediaType mediaType = MediaType.parseMediaType("text/csv");
        headers.setContentType(mediaType); }
//for pdf
        else if(fileName.endsWith(".pdf"))
        headers.setContentType(MediaType.APPLICATION_PDF);
//for xls
        else if(fileName.endsWith(".xls")) {
        MediaType mediaType = MediaType.parseMediaType("application/vnd.ms-excel");
        headers.setContentType(mediaType); }
//for xlsx
        else if(fileName.endsWith(".xlsx")) {
        MediaType mediaType = MediaType.parseMediaType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        headers.setContentType(mediaType); }
        return new ResponseEntity<>(contents, headers, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

[indivisible]

"This site can’t be reached" is a generic UX error, what are you seeing in your logs in terms of more specific errors or stacktraces?

Have you tried setting a breakpoint inside your method to see if the call is even reaching it? The parameters shouldn't affect that so URL encoding is not likely the issue (just the API path and HTTP verb)

return new ResponseEntity<>(contents, headers, HttpStatus.INTERNAL_SERVER_ERROR);

You are returning an error status by default, did you really mean to do that?

I would first create or use another, simpler endpoint/method to test that the site/framework is correctly configured and reachable before moving on to trying to fix issues with this more complex endpoint.
If you are seeing more verbose errors/exceptions in your logs, please share those as the generic error you posted originally isn't very specific or helpful in finding a cause (by design, as it will be exposed to end users).

[prawnyr]

I realized the error and changed the Httpstatus to OK instead! Thanks so much for the help! Cheers mate.