Web Science/Part1: Foundations of the web/Hypertext Transfer Protocol/HTTP header

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Web Science/Part1: Foundations of the web

Web Science/Part1: Foundations of the web/MoocIndex

Web Science/Part1: Foundations of the web/Hypertext Transfer Protocol/HTTP header

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HTTP header

Obiettivi di apprendimento

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Obiettivi di apprendimento

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1 How is the end of the HTTP header defined

	By an empty line
	By the following character string: "\r\n\r\n"
	The http header always has a fixed length
	There is a header field length which specifies the length of the header
	The End of the Header is marked by the String "HEADER_END"

2 What is the Structure of all but the first lines of the header

	Just values according to the header field
	Key value pairs
	the order of the lines is not specified by the protocol
	lines have to end with a Semicolon ";"

3 What ways do you know of for looking at the HTTP response header?

	Most browsers have tools for accessing them
	There is a logfile which saves all the received http headers
	Making a telnet request
	Using Wget
	google search history
	Using Wireshark

Ulteriori letture

1. HTTP header
2. http://www.w3.org/Protocols/HTTP/HTRQ_Headers.html

Discussioni

Navigazione

1. Ethernet
   1. Communication over a shared Medium
   2. Ethernet header
   3. Minimum package length vs maximum cable length
   4. Collision detection
   5. Summary, further reading, homework
2. Internet Protocol
   1. Motivation for IP
   2. Classful IPv4 networks
   3. IP forwarding algorithm
   4. IP header
   5. Summary, further reading, homework
3. Transmission Control Protocol
   1. End to end principle and connection oriented communication
   2. Three way handshake
   3. Port numbers
   4. Sliding window and flow control
   5. Summary, further reading, homework
4. Domain Name System
   1. Tree structure
   2. Terminology
   3. Zones
   4. Review some facts about DNS
   5. Delegating DNS queries
   6. DNS address resolution
   7. Summary, further reading, homework
5. Internet vs World Wide Web
   1. Summary of the internet architecture
   2. Motivation and requirements for the World Wide Web
   3. Design principles of the web
   4. Uniform Resource Identifier
   5. Summary, further reading, homework
6. Hypertext Transfer Protocol
   1. Making HTTP requests
   2. A simple web client
   3. A simple web server
   4. HTTP header
   5. Content negotiation
   6. Summary, further reading, homework
7. Web content
   1. Problem setting for web content formats
   2. Working with XML
   3. HTML for web document structures
   4. Layout elements in HTML
   5. Motivating separation of content and layout
   6. Cascading Style Sheets
   7. Media content
   8. Metadata
   9. Summary, further reading, homework
8. Dynamic Web Content
   1. Basics of server side web programming
   2. Forms and HTTP post request
   3. Handling a post request in a Java Servlet
   4. Client side JavaScript
   5. Ajax and the XMLHttpRequest class
   6. Summary, further reading, homework

Riproduci file multimediale

A simple web server

Riproduci file multimediale

Content negotiation