Initial working implementation of HLS proxy

src/main/java/com/backend/hls/proxy/controller/ProxyController.java

@@ -0,0 +1,30 @@
+package com.backend.hls.proxy.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
+
+import com.backend.hls.proxy.exception.FetchFailException;
+import com.backend.hls.proxy.exception.PlaylistParseException;
+import com.backend.hls.proxy.service.PlaylistProxyService;
+
+@RestController
+public class ProxyController {
+
+    private final PlaylistProxyService playlistProxyService;
+
+    public ProxyController(PlaylistProxyService playlistProxyService) {
+        this.playlistProxyService = playlistProxyService;
+    }
+
+    @GetMapping("/proxy")
+    public ResponseEntity<?> proxy(@RequestParam("url") String url) throws FetchFailException, PlaylistParseException {
+        String fullUrl = ServletUriComponentsBuilder.fromCurrentRequestUri().build().toUriString();
+        String baseUrl = fullUrl.substring(0, fullUrl.indexOf("/", 8));
+        String result = playlistProxyService.proxyPlaylist(url, baseUrl);
+        return ResponseEntity.ok(result);
+    }
+
+}