Download presentation
Presentation is loading. Please wait.
1
Web Programming Week 1 Old Dominion University
Department of Computer Science CS 418/518 Fall 2006 Michael L. Nelson 8/28/06
2
Goals We will learn to work in the LAMP environment:
3
No MS Environments!
4
Goals Demonstrate LAMP proficiency with a semester long project based on a bulletin board system. Some examples:
5
Prerequisites I assume you know:
how to program in some (imperative) language basic Internet/WWW concepts basic HTML basic relational database concepts
6
Who Should Take This Class?
This class will cover breadth, not depth If you want to learn more about: System administration CS 454/554 Network Management HTTP CS 495/595 Web Server Design databases CS 450/550 Database Concepts CS 419/519 Internet Databases and many others…. Java CS 695 Java & XML
7
Administrivia This is a programming class!
I assume you know how to program your grade will be determined solely on your server’s performance on 4 different checkpoints through the semester You will work in teams of 1 or 2 (grad + undergrad teams are possible) Pick teams wisely teams will exist by mutual consent only at any time, teams can split up, but no new teams will be formed after the first assignment is due ex-team members will have access to their shared code base
8
Administrivia 2 Important URLs Class homepage:
Class homepage: Readings are listed under the day they are expected to be completed assignments are listed under the day they will be demoed in class each group will give a 3-4 minute status report the week before an assignment is due! All development will be done on a shared linux machine mln-web.cs.odu.edu
9
Grading 4 programs, 23 points each
20 points for functional requirements 3 points voted on by other groups for aesthetic appeal 8 remaining points come from each group asking or answering 8 technical questions about the assignments on the list no points for duplicate questions or answers!
10
HTTP Operation Origin Client Server
request = (method, URI, version, “MIME-like” message) Origin Server Client response = (version, success/error code, “MIME-like” message)
11
GET Request (ends w/ CRLF) Response
AIHT:~/Desktop/cs595-s06 mln$ telnet 80 | tee 1-1.out Trying Connected to xenon.cs.odu.edu. Escape character is '^]'. GET /~mln/index.html HTTP/1.1 Connection: close Host: HTTP/ OK Date: Mon, 09 Jan :07:04 GMT Server: Apache/ (Unix) ApacheJServ/1.1.2 PHP/4.3.4 Last-Modified: Sun, 29 May :46:53 GMT ETag: "1c52-14ed-42992d1d" Accept-Ranges: bytes Content-Length: 5357 Content-Type: text/html <html> <head> <title>Home Page for Michael L. Nelson</title> <style type="text/css"> <!-- [lots of html deleted] Connection closed by foreign host. Request (ends w/ CRLF) Response
12
HEAD AIHT:~/Desktop/cs595-s06 mln$ telnet 80 | tee 1-2.out Trying Connected to xenon.cs.odu.edu. Escape character is '^]'. HEAD /~mln/index.html HTTP/1.1 Connection: close Host: HTTP/ OK Date: Mon, 09 Jan :14:39 GMT Server: Apache/ (Unix) ApacheJServ/1.1.2 PHP/4.3.4 Last-Modified: Sun, 29 May :46:53 GMT ETag: "1c52-14ed-42992d1d" Accept-Ranges: bytes Content-Length: 5357 Content-Type: text/html Connection closed by foreign host.
13
POST Typically the result of HTML “Forms”
Two types of values in the client’s “Content-type” request header: application/x-www-form-urlencoded (original & default) multipart/form-data introduced in RFC-1867; allows file upload
14
HTML Examples <FORM action="http://server.com/cgi/handle"
enctype= "application/x-www-form-urlencoded" method="post"> <P> What is your name? <INPUT type="text" name="submit-name"><BR> <INPUT type="submit" value="Send"> <INPUT type="reset"> </FORM> <FORM action=" enctype="multipart/form-data" method="post"> <P> What is your name? <INPUT type="text" name="submit-name"><BR> What files are you sending? <INPUT type="file" name="files"> <BR> <INPUT type="submit" value="Send"> <INPUT type="reset"> </FORM> based on examples from:
15
application/x-www-form-urlencoded
POST /~mln/foo.cgi HTTP/1.1 Host: Connection: close Referer: User-Agent: CS 595-s06 Automatic Testing Program Content-type: application/x-www-form-urlencoded Content-Length: 134 action=restore&manufacturer=ford&model=fairlane+500XL &year=1966&status=modified&engine=427+sideoiler &transmission=4+speed+toploader functionally the same as (modulo a possible 414 response): GET /~mln/foo.cgi?action=restore&manufacturer=ford&model=fairlane+500XL &year=1966&status=modified&engine=427+sideoiler&transmission=4+speed+toploader HTTP/1.1 Host: Connection: close Referer: User-Agent: CS 595-s06 Automatic Testing Program
16
multipart/form-data (with file upload)
POST /~mln/foo.cgi HTTP/1.1 Host: Connection: close Referer: User-Agent: CS 595-s06 Automatic Testing Program Content-type: multipart/form-data; boundary= xKhTmLbOuNdArY Content-Length: 698 xKhTmLbOuNdArY Content-Disposition: form-data; name=”action" restore Content-Disposition: form-data; name=”manufacturer" ford Content-Disposition: form-data; name=”model" fairlane 500xl Content-Disposition: form-data; name=”year" 1966 Content-Disposition: form-data; name=”picture"; filename="fairlane.txt" Content-Type: text/plain ______________ // \\ // \\ | __ __ | |--/ \ / \---| \__/ \__/ xKhTmLbOuNdArY-- multipart/form-data (with file upload) note the “--” to indicate the end
17
Response Codes from section of RFC 2616 - 1xx: Informational - Request received, continuing process - 2xx: Success - The action was successfully received, understood, and accepted - 3xx: Redirection - Further action must be taken in order to complete the request - 4xx: Client Error - The request contains bad syntax or cannot be fulfilled - 5xx: Server Error - The server failed to fulfill an apparently valid request
18
But Few Web Resources Are Static Files…
GET /foo HTTP/1.1 Origin Server Client foo HTTP/ OK foo Java, Javascript foo PHP, ASP, JSP foo HTML, PDF, etc.
19
Server Side Processing Mnemonic
CODE HTML html code html code “Traditional” CGI (e.g. Perl) PHP
20
Let’s Look at Some PHP
21
To Do for Next Time… Subscribe to the class email list
Log in to: mln-web.cs.odu.edu uid/passwds same as *.cs.odu.edu machines MySQL login == linux login; passwd = (to be determined) Start reading & practicing in your own public_html directory on the cs machines me your group info! If you’re not in a group by 11:59 PM Sept 11, you’re working alone.
Similar presentations
