(refs #1263) Fix BLOB download in Wiki

src/main/scala/gitbucket/core/controller/WikiController.scala

@@ -219,10 +219,13 @@ trait WikiControllerBase extends ControllerBase {
 
   get("/:owner/:repository/wiki/_blob/*")(referrersOnly { repository =>
     val path = multiParams("splat").head
+    using(Git.open(getWikiRepositoryDir(repository.owner, repository.name))){ git =>
+      val revCommit = JGitUtil.getRevCommitFromId(git, git.getRepository.resolve("master"))
 
-    getFileContent(repository.owner, repository.name, path).map { bytes =>
-      RawData(FileUtil.getContentType(path, bytes), bytes)
-    } getOrElse NotFound()
+      getPathObjectId(git, path, revCommit).map { objectId =>
+        responseRawFile(git, objectId, path, repository)
+      } getOrElse NotFound()
+    }
   })
 
   private def unique: Constraint = new Constraint(){

src/main/scala/gitbucket/core/service/WikiService.scala

@@ -75,22 +75,6 @@ trait WikiService {
     }
   }
 
-  /**
-   * Returns the content of the specified file.
-   */
-  def getFileContent(owner: String, repository: String, path: String): Option[Array[Byte]] =
-    using(Git.open(Directory.getWikiRepositoryDir(owner, repository))){ git =>
-      if(!JGitUtil.isEmpty(git)){
-        val index = path.lastIndexOf('/')
-        val parentPath = if(index < 0) "."  else path.substring(0, index)
-        val fileName   = if(index < 0) path else path.substring(index + 1)
-
-        JGitUtil.getFileList(git, "master", parentPath).find(_.name == fileName).map { file =>
-          git.getRepository.open(file.id).getBytes
-        }
-      } else None
-    }
-
   /**
    * Returns the list of wiki page names.
    */