Url Connection
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The document discusses how to retrieve and process information from remote URLs using the URL and URLConnection classes in Java. It provides examples of opening a URLConnection, reading response headers, and getting input streams to access the resource content. Key methods like openConnection(), getInputStream(), getHeaderFields() are explained.
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The document discusses the Servlet Container Model and various servlet context and session related interfaces and classes in Java EE. It provides details on the ServletContext object and how it can be used to access initialization parameters, resources, attributes etc. It also describes the ServletContextListener interface used to listen to context initialization and destruction events, and the ServletContextAttributeListener used to listen to attribute changes. The document further discusses the HttpSession object and interfaces like HttpSessionListener and HttpSessionAttributeListener used to listen to session creation, destruction and attribute changes respectively.
Unit8 java
The document provides an overview of networking basics including definitions of key terms like network, client, server, hardware, software, and protocol requirements for establishing a network. It discusses IP addressing and the domain name system (DNS). It also introduces socket programming and provides examples of common network applications like email, online shopping, browsing, chatting, downloading files, and online meetings. The remainder of the document discusses the Java networking package and divides it into application layer classes that handle URIs, URLs, and connections, and transport layer classes that support TCP and UDP networking.
Services in Drupal 8
This document discusses services and REST APIs in Drupal 8. It defines key concepts like web services, REST, and the Richardson Maturity model. It explains the components of a REST request and how requests work. Drupal 8 introduces a new routing system based on Symfony, and resources are exposed via plugins that define routes for CRUD operations. Serialization and normalization convert entities to JSON/HAL. Authentication is decoupled from sessions. Overall the document provides an overview of the RESTful services architecture in Drupal 8.
WebApp #3 : API
The document provides an overview of REST APIs and how they can be used to build web applications. It discusses HTTP and URLs, defines REST and its architectural constraints, and shows how to implement REST principles using HTTP methods, URLs and response codes. The document also covers REST API design best practices like versioning, limiting fields, using JSON format, and handling errors properly. It provides resources for further reading on REST APIs and their implementation.
Networking Programming
This document provides an overview of networking programming concepts in .NET, including:
- Client-server model and networking basics like IP addresses and ports
- Classes for HTTP requests (WebRequest, WebResponse) and REST calls (HttpClient)
- TCP networking with TcpListener and TcpClient classes
- Domain Name System (DNS) and its role in resolving domain names
- Code demonstrations of making HTTP requests and setting up a TCP listener/client
The document aims to explain the key concepts and classes for developing network applications in .NET.
Object Oriented Programming with Laravel - Session 4
The document provides an overview of object-oriented programming concepts in Laravel including CSRF protection, HTTP requests, PSR-7 requests, HTTP responses, file uploads, and redirects. It discusses how Laravel generates CSRF tokens, including CSRF tokens in forms, and excluding routes from CSRF protection. It also covers accessing the request object, retrieving request data, old input, uploaded files, and generating different types of responses like redirects, views, and file downloads.
Rest
The REST Architectural Style
Resources
Representations
Actions
Security
This presentation has been developed in the context of the Mobile Applications Development course, DISIM, University of L'Aquila (Italy), Spring 2014.
http://www.ivanomalavolta.com
Chapter 27 Networking - Deitel & Deitel
This document summarizes key topics related to networking in Java, including:
1) Stream sockets provide connection-oriented communication while datagram sockets provide connectionless communication using UDP.
2) URLs can be manipulated in Java by converting them to URLs and using showDocument() to display webpages.
3) Files on a web server can be read using JEditorPane and handling hyperlink clicks, displaying the contents.
4) Simple client-server applications can be created using stream sockets by establishing connections, getting input/output streams, processing data, and closing connections.
Webbasics
URI refers to Uniform Resource Identifiers, which include URLs and URNs used to identify resources on the web. URLs contain the protocol, host, path, and name to locate a resource using its network location. URIs are encoded to represent unsafe characters like spaces using percent encoding. Web browsers make HTTP requests to web servers, which respond by sending the requested pages back to the browser over the TCP protocol in a stateless manner according to the HTTP specification. HTML forms allow collecting user input on web pages for submission to servers via the GET or POST methods.
Androidphpmysql
This document discusses using PHP and MySQL together for a web application. PHP is used to fetch data from the MySQL database and return results. PHP GET and POST methods are described to pass parameters to fetch specific records. Connecting to MySQL via PHP using GET and POST methods is also covered, including encoding variables, sending HTTP requests, and handling responses. Advantages of using PHP and MySQL for a web application are that they are free and easy to implement.
Introduction to the SharePoint Client Object Model and REST API
As Microsoft was releasing SharePoint 2013 it was pretty clear that they were steering people away from using the product as a portal to using it as a gateway to external systems and services. Since the Server Object Model cannot be used remotely, developers building these external systems will need to become familiar with the Client Object Model (CSOM) and/or the REST API if they want to communicate with SharePoint. This session will introduce these two APIs, give a brief overview of their history, and then show you how to get started using them through a series of demonstrations.
Servlet basics
This article tries to demystify HTTP, "servlet", "web server", "application server", "servlet container" and gives the fundamentals of the Java Servlet API (that comes with the J2EE SDK).
Similar to Url Connection (20)
Network Device Database Management with REST using Jersey
Network Device Database Management with REST using Jersey
Object Oriented Programming with Laravel - Session 4
Object Oriented Programming with Laravel - Session 4
Introduction to the SharePoint Client Object Model and REST API
Introduction to the SharePoint Client Object Model and REST API
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TCP wrappers and xinetd provide additional security layers for network services by controlling access at the application level. TCP wrappers work by checking the hosts.allow and hosts.deny files to determine if a client is allowed to connect to a wrapped service like sshd or xinetd. Xinetd is a super server that controls access and starts services like Telnet. It uses configuration files in /etc/xinetd.d to define access rules and settings for each managed service.
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The document discusses Linux iptables firewall. Iptables is the default firewall package for Linux and runs inside the Linux kernel. It has three built-in tables (filter, nat, mangle) that are used to filter, alter, and inspect packets. Iptables uses built-in chains and user-defined rules to allow or deny traffic based on packet criteria like source/destination, protocol, interface etc. Common iptables commands and options are also explained.
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The document discusses Linux file systems and permissions. It describes the Virtual File System (VFS) interface and how it interacts with filesystems, inodes, and open files. It then discusses the EXT2 filesystem in more detail, describing how inodes store file metadata and how hard and soft links work. It also covers common Linux permissions and how to manage users, groups, and permissions using commands like chmod, chown, useradd, and others.
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This document outlines a network administration course taught by Pham Van Tinh, consisting of 30 hours of theory and 60 hours of practice. The course covers topics such as Linux, shell scripts, routing, DHCP, DNS, file transfer protocols, remote access, web servers, email, firewalls, backups and more. Students will use Red Hat Linux manuals, exam guides, and Microsoft certification guides as literature.
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Module 1 Introduction
Phase 1 involves reconnaissance where the hacker gathers information about the target without directly interacting with it. Phase 2 is scanning where the hacker scans the network to find specific information like open ports and operating systems. Phase 3 is gaining access where the hacker exploits a vulnerability to penetrate the system. Phase 4 is maintaining access where the hacker tries to retain ownership and may install backdoors. Phase 5 is covering tracks where the hacker hides evidence of the attack.
Net Security Intro
The document outlines a 15-module network security course taught by Phạm Văn Tính, PhD. The course covers ethical hacking theory over 45 hours and practice over 30 hours. Topics include footprinting, scanning, enumeration, system hacking, trojans, sniffers, denial of service attacks, social engineering, session hijacking, hacking web servers, SQL injection, wireless hacking, Linux hacking, and evading intrusion detection systems. The course material is based on CEH curriculums and references four literature sources on ethical hacking, Linux/Unix security, network security secrets and solutions, and web security.
Module 10 Physical Security
Physical security involves preventing unauthorized access to computer systems and protecting data. It includes securing the company surroundings with fences, gates, and guards. Within premises, CCTV cameras, intruder alarms, and window/door bars provide security. Servers should be locked in enclosed rooms, and workstations in open areas need locks and CCTV monitoring. Access controls like smart cards, biometrics, and entry logs restrict access to sensitive areas. Wireless networks and other equipment also require security measures like encryption and locked storage to protect physical integrity of systems and data.
Module 9 Dos
The document discusses denial of service (DoS) and distributed denial of service (DDoS) attacks. It defines DoS and DDoS attacks, describes different types of DoS attacks like SYN flooding and Smurf attacks. It also explains how botnets and tools are used to launch DDoS attacks, and discusses some common DDoS countermeasures like detection, mitigation and traceback.
Module 8 System Hacking
The document discusses various techniques for hacking systems, including password cracking, privilege escalation, executing applications remotely, and using keyloggers and spyware. It provides an overview of tools that can perform functions like password cracking, sniffing network traffic, capturing credentials, escalating privileges, executing code remotely, and logging keystrokes covertly. Countermeasures to these techniques, like disabling LM hashes, changing passwords regularly, and using antivirus software, are also covered.
Module 6 Session Hijacking
Session hijacking involves an attacker taking over an existing TCP connection between two machines by predicting sequence numbers and spoofing IP addresses. The document discusses the difference between spoofing and hijacking, the steps an attacker takes to hijack a session including predicting sequence numbers and killing the original connection, types of session hijacking techniques, and tools that can be used for session hijacking like Juggernaut, Hunt, IP Watcher, and T-Sight. It also provides countermeasures like using encryption, secure protocols, limiting connections, and educating employees.
Module 5 Sniffers
This document provides an overview of network sniffing including definitions, vulnerable protocols, types of sniffing attacks, tools used for sniffing, and countermeasures. It discusses passive and active sniffing, ARP spoofing, MAC flooding, DNS poisoning techniques, and popular sniffing tools like Wireshark, Arpspoof, and Dsniff. It also outlines methods for detecting sniffing activity on a network such as monitoring for changed MAC addresses and unusual packets, as well as recommendations for implementing countermeasures like encryption, static ARP tables, port security, and intrusion detection systems.
Module 4 Enumeration
The document discusses techniques for enumerating information from systems during the hacking process. It describes establishing null sessions to extract user names, shares, and other details without authentication. Tools like DumpSec, Netview, Nbtstat, GetAcct, and PS Tools are also covered as ways to enumerate users, groups, shares, permissions, and more from Windows and UNIX systems. The document also provides countermeasures like restricting null sessions and the anonymous user to protect against enumeration attacks.
Module 3 Scanning
The document discusses scanning techniques used during penetration testing and hacking. It defines different types of scanning like port scanning, network scanning, and vulnerability scanning. It describes tools like Nmap that can be used to perform these scans and examines techniques like SYN scanning, XMAS scanning, NULL scanning, and IDLE scanning. The document also discusses using proxies and anonymizers to hide one's location while scanning and ways to document results like creating network diagrams of vulnerable systems.