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What is AF_INET, and why do I need it?
...ple, supports 29 other address families such as UNIX (AF_UNIX) sockets and IPX (AF_IPX), and also communications with IRDA and Bluetooth (AF_IRDA and AF_BLUETOOTH, but it is doubtful you'll use these at such a low level).
For the most part, sticking with AF_INET for socket programming over a networ...
create a trusted self-signed SSL cert for localhost (for use with Express/Node)
... Then on the connecting machine update the HOSTS file to point the server IP address to the hostname, for example: 192.168.0.50 server.local This will allow the certificate and the address to match up and validate the certificate.
– roskelld
Oct 5 '18 at 18:...
What is the difference between an Azure Web Site and an Azure Web Role
...beyond Web Apps (formerly Web Sites):
Ability to run elevated startup scripts to install apps, modify registry settings, install performance counters, fine-tune IIS, etc.
Ability to split an app up into tiers (maybe Web Role for front end, Worker Role for backend processing) and scale independentl...
Difference between socket and websocket?
...g to Application Server over a protocol similar to HTTP that runs over TCP/IP. So they are primarily for Web Applications that require a permanent connection to its server. On the other hand, plain sockets are more powerful and generic. They run over TCP/IP but they are not restricted to browsers or...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...管理：自动重连、错误处理、状态监控
智能数据处理：实时数据分析、自动控制、告警系统
高级功能实现：批量处理、心跳机制、设备发现
生产级部署：安全连接、性能监控、系统健康检查
这些技术和最佳实践为构建企...
node and Error: EMFILE, too many open files
... FD TYPE DEVICE SIZE/OFF NODE NAME
...
nodejs 12211 root 1012u IPv4 151317015 0t0 TCP 10.101.42.209:40371->54.236.3.170:80 (ESTABLISHED)
nodejs 12211 root 1013u IPv4 151279902 0t0 TCP 10.101.42.209:43656->54.236.3.172:80 (ESTABLISHED)
nodejs 12211 root 1014...
Maximum on http header values?
...y to define the custom max size of the header ?
– Sudip Bolakhe
Apr 30 '19 at 9:52
1
Be aware of ...
How to pass a user defined argument in scrapy spider
...o pass arguments to run on scrapyd replace -a with -d
curl http://your.ip.address.here:port/schedule.json -d
spider=myspider -d category='mycategory' -d domain='example.com'
The spider will receive arguments in its constructor.
class MySpider(Spider):
name="myspider"
def __init__...
Which $_SERVER variables are safe?
...hould be rejected by the web server and not cause the invocation of the script to begin with. Hence they can be considered reliable.
'HTTPS'
'REQUEST_TIME'
'REMOTE_ADDR' *
'REMOTE_HOST' *
'REMOTE_PORT' *
'SERVER_PROTOCOL'
'HTTP_HOST' †
'SERVER_NAME' †
'SCRIPT_FILENAME'
'SERVER_PORT' ‡
'SCRIP...
Chrome DevTools Devices does not detect device when plugged in
...ools for your platform. I'm using Windows, and the steps for me were:
-Unzip the download into c:\platform-tools (I just put it here for
convenience, you can choose a different location).
-Open command prompt (run as administrator) in folder, and run the
following command:
adb devices
(Th...