Added SplunkLog Controller

gate-web/src/main/groovy/com/netflix/spinnaker/gate/controllers/SplunkLogController.java

@@ -0,0 +1,44 @@
+package com.netflix.spinnaker.gate.controllers;
+
+import io.swagger.annotations.ApiOperation;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/splunk")
+@ConditionalOnProperty("splunk.log.enabled")
+public class SplunkLogController {
+  private static final Logger log = LoggerFactory.getLogger(SplunkLogController.class);
+
+  // Sample baseURL = https://hostURL?paramsKey=paramsValue&index=CLUSTER_NAME%20pod=POD_NAME
+  @Value("${splunk.log.baseURL}")
+  private String baseURL;
+
+  @Value("${splunk.log.clusterName}")
+  private String clusterName;
+
+  @ApiOperation("Retrieve splunk logs")
+  @GetMapping("/logs/{podName}")
+  public ResponseEntity<byte[]> getSplunkLogs(@PathVariable("podName") String podName)
+      throws IOException {
+    String logUrl = baseURL.replace("CLUSTER_NAME", clusterName).replace("POD_NAME", podName);
+    log.info("Inside SplunkLogController - getSplunkLogs(), splunk Log URL : " + logUrl);
+
+    try (InputStream in = new URL(logUrl).openStream()) {
+      byte[] fileContents = in.readAllBytes();
+      return ResponseEntity.ok()
+          .header("Content-Disposition", "attachment; filename=log.zip")
+          .body(fileContents);
+    }
+  }
+}