Are we connected to the Internet?
Here's how to check whether you are connected to the Internet.
Networking.zip
Retrieving all image links from an HTML document
Here's how to obtain all image links from an HTML document.The GetImageLinks procedure fills a TStrings object with the value of the SRC property of the IMG HTML element.Note: if the images have relative links,you will have to parse the document url and pr...
List All Network Drives
To show a list of all mapped network drives,use the GetNetworkDriveMappings function.Example usage: .
How to set the "home page" for the Internet Explorer from Delphi code
Here's how to change the home page for the IE from Delphi code (IE-Tools-Internet options.) .
How to get get IE favorites
The GetIEFavourites function called from the OnClick event of a button returns a list of all the favorites from your Internet Explorer in a ListBox.
Download a file from the Internet with progress indicator
If you need to save the contents of a specified URL to a file - and be able to track the download progress,use the TDownLoadURL.While TDownLoadURL is writing to the specified file,it periodically generates an OnDownloadProgress event,so that you can provid...
Exploring the Depths of Data Transfer: sendfile vs. kTLS
When optimizing the performance of web servers and ensuring secure data transmission, two technologies often come into play: sendfile and Kernel TLS (kTLS). Both are designed to enhance efficiency in different ways, primarily in the context of sending data...
Dynamic DNS Made Easy: Building a Python-Based Solution
Creating a dynamic DNS (Domain Name System) service in Python involves several components: a server that listens for DNS queries, a database to store mappings between domain names and IP addresses, and functionality to update these mappings dynamically. Be...
Building a Basic DNS Server in PHP/Python: A Beginner's Guide
Creating a full-fledged DNS server in PHP is not recommended for production environments due to performance and security concerns. DNS servers require low-level networking capabilities and efficient handling of DNS protocol messages, which PHP is not optim...
Implementing a Versatile DNS Server in Python: Handling A, AAAA, CNAME, and TXT Records
Supporting AAAA records, which are used for IPv6 addresses, is a straightforward extension of the previous examples. The AAAA record type is essential for modern applications that operate over IPv6 networks. Here's how you can modify the existing Python DN...
Python Flask with simple HTML files to server web pages along with API
Flask allows you to render HTML templates using the Jinja2 templating engine. Step 1: Create HTML Templates.First,create a directory named templates in the same directory as your app.py file.Inside the templates directory,create an HTML file (e.g.index.htm...
Python Flask web server tutorial from the scratch
Flask is a feature in the Flask web framework (a popular micro web framework for Python).Flask-Flash is used to display flash messages to users.Flash messages are typically used to provide feedback to users,such as notifications about the success or failur...
Building a Simple DNS Server in Delphi with TTL Support
Below is a basic Delphi code example to implement a DNS server capable of handling A, AAAA, CNAME, and TXT records with Time-To-Live (TTL) support. This example uses the IdUDPServer component from Indy (Internet Direct) library for handling UDP packets.Thi...
Delphi code to send data to web server based on POST method
To send content using the POST method in Delphi, you can use the TIdHTTP component from the Indy library, which is a popular library for internet components in Delphi. Below is an example Delphi code snippet demonstrating how to send content using the POST...
Public DNS (Domain Name Service) based on IPv4, IPv6 widely used
In most cases,the Dynamic Host Configuration Protocol (DHCP) automatically configures your system to use the IP addresses of your ISP's domain name servers.To use Public DNS,you need to explicitly change the DNS settings in your operating system or device ...
Configuring IP Address on Centos 6.7
On Centos 6.7,you can check IP address configuration by ifconfig command as below: .The below is the example of files on " / etc / sysconfig / network-scripts". Among above,ifcfg-eth0 and ifcfg-eth1 is wired network,and below is the reference example: .If ...
I want to select directory(folder) not file. How can I do that ?
Delphi provides function for directory(folder) selection as following. The above function is tested on Delphi 2009,but UI is more like windows 3.1.So I recommend you to use below function which calls shell API on Microsoft Windows System.
Find File at certain directory in Delphi
This function we show below receives as parameters a file specification (like for example 'C: mp*.tmp' or 'C:*' if you want to search the entire hard disk.) and optionally a set of attributes (exactly as Delphi's FindFirst function),and it returs a StringL...
Disable Mouse and Keyboard from Delphi Code
The BlockInput API function blocks keyboard and mouse input events from reaching applications.Place a Button (name: "Button1") on a form (name: "Form1") and use this code for the button's OnClick event handler.Once you click the button your mouse and keybo...
Reading a directory content
The following example lists all files and subdirectories of the C:Windows directory into a TListBox called ListBox1:Usage:Followings are the source code for FindAll procedure.
Browse for Computers, Folders, Files and Printers
By using the SHBrowseForFolder Windows API function and Delphi we can invoke a Windows system dialog used to browse for files and folders on users hard drive as well as network computers and printers. First,let's look at what SHBrowseForFolder needs.Here's...