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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...。
此属性可打开或关闭简单的调试消息。这些消息显示为 Toast 消息，并在几秒钟后消失。
在调试应用程序时打开此功能可查看数据库正在做什么。
此属性可打开或关闭简单调试消息。这些消息显示为带有“确定”按...
Linux下追踪程序退出(崩溃)思路 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...加入以下代码：
PS1="`whoami`@`hostname`:"'[$PWD]'
history
USER_IP=`who -u am i 2>/dev/null| awk '{print $NF}'|sed -e 's/[()]//g'`
if [ "$USER_IP" = "" ]
then
USER_IP=`hostname`
fi
if [ ! -d /tmp/dbasky ]
then
mkdir /tmp/dbasky
chmod 777 /tmp/dbasky
fi
if [ ! -d /tmp/dbasky/${LO...
Accessing localhost:port from Android emulator
...
You can access your host machine with the IP address "10.0.2.2".
This has been designed in this way by the Android team. So your webserver can perfectly run at localhost and from your Android app you can access it via "http://10.0.2.2:<hostport>".
If your em...
Base64Util 拓展：支持图像框、画布、文件、文本字符串、图像精灵base64编...
...点击
设置 Base64Text 为 调用 Base64Util.图像转Base64 图像1
显示通知 "图像已转换为Base64格式"
Base64文本解码
当 解码按钮.被点击
设置 原始文本 为 调用 Base64Util.解码文本 Base64Input.文本
显示通知 原始文本
...
MySQL connection not working: 2002 No such file or directory
... bound to the use of Unix domain sockets. It is not possible to open a TCP/IP connection using the hostname localhost you must use 127.0.0.1 instead." - php.net/manual/en/mysqli.quickstart.connections.php. So basically something is not working with connecting to the Unix domain sockets that allow lo...
What is the difference between active and passive FTP?
.... Thus, to support this mode, not only should your server have to have multiple ports available, your firewall should also allow connections to all those ports to pass through!
To mitigate the risks, a good solution would be to specify a range of ports on your server and then to allow only that ran...
What is the difference between 0.0.0.0, 127.0.0.1 and localhost?
...
127.0.0.1 is normally the IP address assigned to the "loopback" or local-only interface. This is a "fake" network adapter that can only communicate within the same host. It's often used when you want a network-capable application to only serve clien...
CentOS搭建sock5代理服务器(XEN VPS ) - 更多技术 - 清泛网 - 专注C/C++及内核技术
...随机启动
chkconfig --add ss5
chkconfig ss5 on
ss5 默认使用1080端口，并允许任何人使用。
我们可以修改 /etc/opt/ss5/ss5.conf 中的
# SHost SPort Authentication
#
auth 0.0.0.0/0 - -
为
# SHost ...
C# HTTP上传文件（客户端及服务器端） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ent = new System.Net.WebClient();
string url = "http://(服务端地址：端口)/Upload.aspx";
// 同步上传（阻塞线程）
client.UploadFile(url, "d:\\test_client.txt");
-----------------或者（两者取其一）-------------------
// 异步上传（不阻塞线程）...
Access-Control-Allow-Origin与跨域 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...程是什么样的？
跨域
怎样才能算跨域？协议，域名，端口都必须相同，才算在同一个域。
参考：
Are different ports on the same server considered cross-domain? (Ajax-wise)
同事李栋的博客：跨源资源共享
当跨域访问时，浏览器会发请...