The document discusses HTTP (Hypertext Transfer Protocol) which is used to transfer data between clients and servers over the internet. It transfers plain text, hypertext, audio, video and other file types. HTTP is similar to FTP in that it transfers files using TCP, and similar to SMTP in that data is transferred between clients and servers. HTTP uses requests from clients and responses from servers. Request messages contain a request line with the method, URL, and HTTP version. Response messages contain a status line with the HTTP version, status code, and status phrase. Common HTTP methods include GET, HEAD, POST, PUT, DELETE, and others.

1. Assalam-U-Alaikum 

2. We are:
 Iffat Jahan (132-15-2661)
▪ Izmat Ara (132-15-2712)
▪ Mukhlesur Rahman (132-15-2766)
▪ Hasanuzzaman Dipu (132-15-2646)
▪ Minhajul Karim (132-15-2637)

3. Topic:
http://

4. What is HTTP?

5. Transfers data
▪ Plain text
▪ Hypertext
▪ Audio
▪ Video and many more…..

6. Why Hypertext?

7. Function
FTP
SMTP
combination

8. Similar to FTP
Transfers files and usesTCP

9. Similar to SMTP
Data transferred between client and server
are similar to SMTP messages

10. The idea

11. Transaction

12. Types of Messages
a)Request
b) Response

13. Request Messages
Request Line
Headers
A blank line
Body

14. Request Line
Request type
(method)
URL HTTP
version

15. URL
Method Host Port Path:// : /

16. Method
The protocol to retrieve the document

17. Host
The computer where the information is located

18. Port
Can optionally contain the port number

19. Path
Is the name of the desired file

20. Methods

21. GET
▪ Client wants to retrieve a document from server.
▪ The server usually responds with the contents of
the document.

22. HEAD
▪ Client wants info, not the document.
▪ Similar to GET.

23. POST
Client provides info to the server

24. PUT
▪ Create or replace document on server.
▪ Document is included in the body of the request &
stored in the location defined by URL.

25. PATCH
▪ Similar to PUT.
▪ The request contains a list of differences.

26. COPY
▪ Copies a file to another location.
▪ Location of source file is given in the URL.
▪ Location of destination is given in the entry header.

27. MOVE
▪ Moves a file.
▪ Similar to COPY.

28. DELETE
Removes a document

29. Link
▪ Create link/links from a document to another
location.
▪ The location of the file is given in the request link
(URL).
▪ The location of the destination is given in the entry
header.

30. Others like…..
▪ Unlink
▪ Option

31. Response Messages
Status Line
Headers
A blank line
Body

32. Status Line
HTTP version Status code Status phrase

33. HTTP Version
The same as the request line

34. Status Code
Is similar to FTP & SMTP protocols

35. Status Phrase
Explains the status code in the text form

36. Headers
Exchange additional
information
between client &
server

37. Header Format
Header Name : Header value

38. Header Categories
a)General
b)Request
c) Response
d)Entity

39. Headers
Request line
General headers
Request headers
Entity headers
A blank line
Body
Status line
General headers
Response headers
Entity headers
A blank line
Body

40. Example:

41. Thanks 