From 921d5141c00524498f255e0eb852b37ea45df18b Mon Sep 17 00:00:00 2001
From: niumoo <niumoo@126.com>
Date: Mon, 3 Aug 2020 14:35:32 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E6=96=B9=E6=B3=95=E6=B3=A8?=
 =?UTF-8?q?=E9=87=8A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/com/wdbyte/downbit/util/HttpUtls.java | 39 ++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/com/wdbyte/downbit/util/HttpUtls.java b/src/com/wdbyte/downbit/util/HttpUtls.java
index 9a6c416..7fc0df5 100644
--- a/src/com/wdbyte/downbit/util/HttpUtls.java
+++ b/src/com/wdbyte/downbit/util/HttpUtls.java
@@ -15,13 +15,29 @@
  */
 public class HttpUtls {
 
+    /**
+     * 获取 HTTP 链接
+     *
+     * @param url
+     * @return
+     * @throws IOException
+     */
     public static HttpURLConnection getHttpUrlConnection(String url) throws IOException {
         URL httpUrl = new URL(url);
-        HttpURLConnection httpConnection = (HttpURLConnection)httpUrl.openConnection();
+        HttpURLConnection httpConnection = (HttpURLConnection) httpUrl.openConnection();
         httpConnection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36");
         return httpConnection;
     }
 
+    /**
+     * 获取 HTTP 链接
+     *
+     * @param url
+     * @param start
+     * @param end
+     * @return
+     * @throws IOException
+     */
     public static HttpURLConnection getHttpUrlConnection(String url, long start, Long end) throws IOException {
         HttpURLConnection httpUrlConnection = getHttpUrlConnection(url);
         if (end != null) {
@@ -32,6 +48,13 @@ public static HttpURLConnection getHttpUrlConnection(String url, long start, Lon
         return httpUrlConnection;
     }
 
+    /**
+     * 获取网络文件大小 bytes
+     *
+     * @param url
+     * @return
+     * @throws IOException
+     */
     public static long getHttpFileContentLength(String url) throws IOException {
         HttpURLConnection httpUrlConnection = getHttpUrlConnection(url);
         int contentLength = httpUrlConnection.getContentLength();
@@ -39,13 +62,27 @@ public static long getHttpFileContentLength(String url) throws IOException {
         return contentLength;
     }
 
+    /**
+     * 获取网络文件 Etag
+     *
+     * @param url
+     * @return
+     * @throws IOException
+     */
     public static String getHttpFileEtag(String url) throws IOException {
         HttpURLConnection httpUrlConnection = getHttpUrlConnection(url);
         Map<String, List<String>> headerFields = httpUrlConnection.getHeaderFields();
         List<String> eTagList = headerFields.get("ETag");
+        httpUrlConnection.disconnect();
         return eTagList.get(0);
     }
 
+    /**
+     * 获取网络文件名
+     *
+     * @param url
+     * @return
+     */
     public static String getHttpFileName(String url) {
         int indexOf = url.lastIndexOf("/");
         return url.substring(indexOf + 1);