Http basics
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This document provides an overview of HTTP basics and tools for working with HTTP requests and responses. It discusses using the SimpleHTTPServer module in Python to quickly start an HTTP server. It then demonstrates making GET and POST requests using curl and viewing the response headers and body. The document also shows examples of customizing the HTTP server handler to print request headers and emulate POST requests. In the examples, the SimpleHTTPServer is run on port 8000 and curl is used to make requests and view the responses.
![SimpleHTTPServer
$>python-mSimpleHTTPServer8080
ServingHTTPon0.0.0.0port8080...
127.0.0.1--[02/Feb/201605:16:09]"GET/HTTP/1.1"200-
127.0.0.1--[02/Feb/201605:18:11]"GET/HTTP/1.1"200-
6 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-6-320.jpg)
![Put a Path
$>python-mSimpleHTTPServer8080
ServingHTTPon0.0.0.0port8080...
127.0.0.1--[02/Feb/201605:33:06]code404,messageFilenotfound
127.0.0.1--[02/Feb/201605:33:06]"GET/oncomHTTP/1.1"
A Different Port
9 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-9-320.jpg)
![$>python-mSimpleHTTPServer8080
ServingHTTPon0.0.0.0port8080...
127.0.0.1--[02/Feb/201605:40:41]code501,messageUnsupportedmethod('POST')
127.0.0.1--[02/Feb/201605:40:41]"POST/HTTP/1.1"501-
A Different Verb
10 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-10-320.jpg)
![Server
PuTTY / Terminal
GET/HTTP/1.1
Host:localhost:8080
#orsimply
GET/HTTP/1.1
$>python-mSimpleHTTPServer8080
ServingHTTPon0.0.0.0port8080...
127.0.0.1--[03/Feb/201603:16:37]"GET/HTTP/1.1"200-
127.0.0.1--[03/Feb/201603:18:12]"GET/HTTP/1.1"200-
Response
HTTP/1.0200OK
Server:SimpleHTTP/0.6Python/2.7.10
Date:Tue,02Feb201620:16:37GMT
Content-type:text/html;charset=mbcs
Content-Length:246
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML3.2Final//EN"><html
<title>Directorylistingfor/</title>
<body>
<h2>Directorylistingfor/</h2><hr>
<ul>
<li><ahref="serv.py">serv.py</a>
<li><ahref="source/">source/</a>
</ul><hr>
</body></html>
12 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-12-320.jpg)
![Playing with Reqs
PuTTY / Terminal
GETHTTP/1.1
#
GET
$>python-mSimpleHTTPServer8080
ServingHTTPon0.0.0.0port8080...
127.0.0.1--[03/Feb/201603:21:19]code404,messageFilenotfound
127.0.0.1--[03/Feb/201603:21:19]"GETHTTP/1.1"404-
127.0.0.1--[03/Feb/201603:22:37]code400,messageBadrequestsyntax(
127.0.0.1--[03/Feb/201603:22:37]"GET"400-
Responses
<head><title>Errorresponse</title></head>
<body>
<h1>Errorresponse</h1>
<p>Errorcode404.
<p>Message:Filenotfound.
<p>Errorcodeexplanation:404=NothingmatchesthegivenURI
</body>
<head><title>Errorresponse</title></head>
<body>
<h1>Errorresponse</h1>
<p>Errorcode400.
<p>Message:Badrequestsyntax('GET').
<p>Errorcodeexplanation:400=Badrequestsyntaxorunsuppo
</body>
13 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-13-320.jpg)
![Playing with Reqs
PuTTY / Terminal
GET/oncomHTTP/1.1
$>python-mSimpleHTTPServer8080
ServingHTTPon0.0.0.0port8080...
127.0.0.1--[03/Feb/201603:18:51]code404,messageFilenotfound
127.0.0.1--[03/Feb/201603:18:51]"GET/oncomHTTP/1.1"
Response
HTTP/1.0404Filenotfound
Server:SimpleHTTP/0.6Python/2.7.10
Date:Tue,02Feb201620:18:51GMT
Content-Type:text/html
Connection:close
<head>
<title>Errorresponse</title>
</head>
<body>
<h1>Errorresponse</h1>
<p>Errorcode404.
<p>Message:Filenotfound.
<p>Errorcodeexplanation:404=NothingmatchesthegivenURI
</body>
14 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-14-320.jpg)
![Playing with Reqs
PuTTY / Terminal
POST/HTTP/1.1
$>python-mSimpleHTTPServer8080
ServingHTTPon0.0.0.0port8080...
127.0.0.1--[03/Feb/201603:26:23]code501,messageUnsupportedmethod(
127.0.0.1--[03/Feb/201603:26:23]"POST/HTTP/1.1"501-
Response
HTTP/1.0501Unsupportedmethod('POST')
Server:SimpleHTTP/0.6Python/2.7.10
Date:Tue,02Feb201620:26:23GMT
Content-Type:text/html
Connection:close
<head><title>Errorresponse</title></head>
<body>
<h1>Errorresponse</h1>
<p>Errorcode501.
<p>Message:Unsupportedmethod('POST').
<p>Errorcodeexplanation:501=Serverdoesnotsupportthis
</body>
15 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-15-320.jpg)
![Server #00
Codes
importSimpleHTTPServer
importSocketServer
#---------------------------------------------------
PORT =8000
Handler=SimpleHTTPServer.SimpleHTTPRequestHandler
httpd =SocketServer.TCPServer(("",PORT),Handler)
#---------------------------------------------------
print"Servingatport",PORT
httpd.serve_forever()
$>pythonserver-00.py
Servingatport8000
127.0.0.1--[04/Feb/201609:34:45]"GET/HTTP/1.1"200-
127.0.0.1--[04/Feb/201609:38:41]code501,messageUnsupportedmethod(
127.0.0.1--[04/Feb/201609:38:41]"POST/HTTP/1.1"501-
cURL
$>curl-vhttp://localhost:8000/
#...Connectedtolocalhost(127.0.0.1)port8000(#0)
>GET/HTTP/1.1
>Host:localhost:8000
>User-Agent:curl/7.47.0
>Accept:*/*
>
#HTTP1.0,assumecloseafterbody
<HTTP/1.0200OK
<Server:SimpleHTTP/0.6Python/2.7.10
<Date:Thu,04Feb201602:34:45GMT
<Content-type:text/html;charset=mbcs
<Content-Length:416
<
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML3.2Final//EN"><html>
<title>Directorylistingfor/</title>
<body>
<h2>Directorylistingfor/</h2>
<hr><ul>
<li><ahref="file.html">file.html</a>
<li><ahref="server-00.py">server-00.py</a>
<li><ahref="server-01.py">server-01.py</a>
<li><ahref="server-02.py">server-02.py</a>
<li><ahref="source/">source/</a>
</ul><hr>
</body></html>
#Closingconnection0
17 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-17-320.jpg)
![Server #00
$>pythonserver-00.py
Servingatport8000
127.0.0.1--[04/Feb/201609:34:45]"GET/HTTP/1.1"200-
127.0.0.1--[04/Feb/201609:38:41]code501,messageUnsupportedmethod(
127.0.0.1--[04/Feb/201609:38:41]"POST/HTTP/1.1"501-
cURL
$>curl-v-XPOSThttp://localhost:8000/
$>curl-v-d''http://localhost:8000/
#...Connectedtolocalhost(127.0.0.1)port8000(#0)
>POST/HTTP/1.1
>Host:localhost:8000
>User-Agent:curl/7.47.0
>Accept:*/*
>Content-Length:2
>Content-Type:application/x-www-form-urlencoded
>
#uploadcompletelysentoff:2outof2bytes
#HTTP1.0,assumecloseafterbody
<HTTP/1.0501Unsupportedmethod('POST')
<Server:SimpleHTTP/0.6Python/2.7.10
<Date:Thu,04Feb201602:38:41GMT
<Content-Type:text/html
<Connection:close
<
<head><title>Errorresponse</title></head>
<body>
<h1>Errorresponse</h1>
<p>Errorcode501.
<p>Message:Unsupportedmethod('POST').
<p>Errorcodeexplanation:501=Serverdoesnotsupportthis
</body>
#Closingconnection0
18 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-18-320.jpg)
![Server #01
Custom Handler
importSimpleHTTPServer
importSocketServer
#---------------------------------------------------
classGetHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
defdo_GET(self):
printself.headers
SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self)
#---------------------------------------------------
PORT =8000
Handler=GetHandler
httpd =SocketServer.TCPServer(("",PORT),Handler)
#---------------------------------------------------
print"servingatport",PORT
httpd.serve_forever()
$>pythonserver-01.py
servingatport8000
Host:localhost:8000
User-Agent:curl/7.47.0
Accept:*/*
127.0.0.1--[04/Feb/201611:50:12]"GET/HTTP/1.1"200-
$>curl-vhttp://localhost:8000/
#...Connectedtolocalhost(127.0.0.1)port8000(#0)
>GET/HTTP/1.1
>Host:localhost:8000
>User-Agent:curl/7.47.0
>Accept:*/*
>
#HTTP1.0,assumecloseafterbody
<HTTP/1.0200OK
<Server:SimpleHTTP/0.6Python/2.7.10
<Date:Thu,04Feb201604:50:12GMT
<Content-type:text/html;charset=mbcs
<Content-Length:416
<
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML3.2Final//EN"><html>
...Closingconnection0
19 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-19-320.jpg)
![Server #02
Fake POST
$>pythonserver-02.py
servingatport8000
Host:localhost:8000
User-Agent:curl/7.47.0
Accept:*/*
127.0.0.1--[04/Feb/201614:05:56]"POST/HTTP/1.1"200-
Host:localhost:8000
User-Agent:curl/7.47.0
Accept:*/*
Content-Length:2
Content-Type:application/x-www-form-urlencoded
127.0.0.1--[04/Feb/201614:07:22]"POST/HTTP/1.1"200-
$>curl-v-XPOSThttp://localhost:8000/
$>curl-v-XPOSThttp://localhost:8000/-d''
#...Connectedtolocalhost(127.0.0.1)port8000(#0)
>POST/HTTP/1.1
>Host:localhost:8000
>User-Agent:curl/7.47.0
>Accept:*/*
>Content-Length:2
>Content-Type:application/x-www-form-urlencoded
>
#uploadcompletelysentoff:2outof2bytes
#HTTP1.0,assumecloseafterbody
<HTTP/1.0200OK
<Server:SimpleHTTP/0.6Python/2.7.10
<Date:Thu,04Feb201607:07:22GMT
<Content-type:text/html;charset=mbcs
<Content-Length:416
<
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML3.2Final//EN"><html>
<title>Directorylistingfor/</title>
<body>
<h2>Directorylistingfor/</h2>
<hr>
<ul>
<li><ahref="file.html">file.html</a>
<li><ahref="serv.py">serv.py</a>
</ul><hr>
</body></html>
#Closingconnection0
21 / 24](https://image.slidesharecdn.com/httpbasics-160204073109/85/Http-basics-21-320.jpg)
Http basics
- 1. KBTW Lab #1 HTTP Basics Eueung Mulyana http://eueung.github.io/EL6240/http EL-6240 | Attribution-ShareAlike CC BY-SA 1 / 24
- 2. Outline Tools Quick Start Beyond CLI - Put Some Codes 2 / 24
- 4. 4 / 24 This Checklist Please: Python 2 Putty or Terminal Request Maker / Postman (Chrome Ext./App.) Text Editor cURL
- 5. Quick Start 5 / 24
- 7. Request Maker - Response Header 7 / 24
- 8. Request Maker - Response Body -> Document 8 / 24
- 9. Put a Path $>python-mSimpleHTTPServer8080 ServingHTTPon0.0.0.0port8080... 127.0.0.1--[02/Feb/201605:33:06]code404,messageFilenotfound 127.0.0.1--[02/Feb/201605:33:06]"GET/oncomHTTP/1.1" A Different Port 9 / 24
- 11. Using PuTTY / Terminal 11 / 24
- 13. Playing with Reqs PuTTY / Terminal GETHTTP/1.1 # GET $>python-mSimpleHTTPServer8080 ServingHTTPon0.0.0.0port8080... 127.0.0.1--[03/Feb/201603:21:19]code404,messageFilenotfound 127.0.0.1--[03/Feb/201603:21:19]"GETHTTP/1.1"404- 127.0.0.1--[03/Feb/201603:22:37]code400,messageBadrequestsyntax( 127.0.0.1--[03/Feb/201603:22:37]"GET"400- Responses <head><title>Errorresponse</title></head> <body> <h1>Errorresponse</h1> <p>Errorcode404. <p>Message:Filenotfound. <p>Errorcodeexplanation:404=NothingmatchesthegivenURI </body> <head><title>Errorresponse</title></head> <body> <h1>Errorresponse</h1> <p>Errorcode400. <p>Message:Badrequestsyntax('GET'). <p>Errorcodeexplanation:400=Badrequestsyntaxorunsuppo </body> 13 / 24
- 14. Playing with Reqs PuTTY / Terminal GET/oncomHTTP/1.1 $>python-mSimpleHTTPServer8080 ServingHTTPon0.0.0.0port8080... 127.0.0.1--[03/Feb/201603:18:51]code404,messageFilenotfound 127.0.0.1--[03/Feb/201603:18:51]"GET/oncomHTTP/1.1" Response HTTP/1.0404Filenotfound Server:SimpleHTTP/0.6Python/2.7.10 Date:Tue,02Feb201620:18:51GMT Content-Type:text/html Connection:close <head> <title>Errorresponse</title> </head> <body> <h1>Errorresponse</h1> <p>Errorcode404. <p>Message:Filenotfound. <p>Errorcodeexplanation:404=NothingmatchesthegivenURI </body> 14 / 24
- 15. Playing with Reqs PuTTY / Terminal POST/HTTP/1.1 $>python-mSimpleHTTPServer8080 ServingHTTPon0.0.0.0port8080... 127.0.0.1--[03/Feb/201603:26:23]code501,messageUnsupportedmethod( 127.0.0.1--[03/Feb/201603:26:23]"POST/HTTP/1.1"501- Response HTTP/1.0501Unsupportedmethod('POST') Server:SimpleHTTP/0.6Python/2.7.10 Date:Tue,02Feb201620:26:23GMT Content-Type:text/html Connection:close <head><title>Errorresponse</title></head> <body> <h1>Errorresponse</h1> <p>Errorcode501. <p>Message:Unsupportedmethod('POST'). <p>Errorcodeexplanation:501=Serverdoesnotsupportthis </body> 15 / 24
- 16. Beyond CLI Put Some Codes 16 / 24
- 17. Server #00 Codes importSimpleHTTPServer importSocketServer #--------------------------------------------------- PORT =8000 Handler=SimpleHTTPServer.SimpleHTTPRequestHandler httpd =SocketServer.TCPServer(("",PORT),Handler) #--------------------------------------------------- print"Servingatport",PORT httpd.serve_forever() $>pythonserver-00.py Servingatport8000 127.0.0.1--[04/Feb/201609:34:45]"GET/HTTP/1.1"200- 127.0.0.1--[04/Feb/201609:38:41]code501,messageUnsupportedmethod( 127.0.0.1--[04/Feb/201609:38:41]"POST/HTTP/1.1"501- cURL $>curl-vhttp://localhost:8000/ #...Connectedtolocalhost(127.0.0.1)port8000(#0) >GET/HTTP/1.1 >Host:localhost:8000 >User-Agent:curl/7.47.0 >Accept:*/* > #HTTP1.0,assumecloseafterbody <HTTP/1.0200OK <Server:SimpleHTTP/0.6Python/2.7.10 <Date:Thu,04Feb201602:34:45GMT <Content-type:text/html;charset=mbcs <Content-Length:416 < <!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML3.2Final//EN"><html> <title>Directorylistingfor/</title> <body> <h2>Directorylistingfor/</h2> <hr><ul> <li><ahref="file.html">file.html</a> <li><ahref="server-00.py">server-00.py</a> <li><ahref="server-01.py">server-01.py</a> <li><ahref="server-02.py">server-02.py</a> <li><ahref="source/">source/</a> </ul><hr> </body></html> #Closingconnection0 17 / 24
- 19. Server #01 Custom Handler importSimpleHTTPServer importSocketServer #--------------------------------------------------- classGetHandler(SimpleHTTPServer.SimpleHTTPRequestHandler): defdo_GET(self): printself.headers SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self) #--------------------------------------------------- PORT =8000 Handler=GetHandler httpd =SocketServer.TCPServer(("",PORT),Handler) #--------------------------------------------------- print"servingatport",PORT httpd.serve_forever() $>pythonserver-01.py servingatport8000 Host:localhost:8000 User-Agent:curl/7.47.0 Accept:*/* 127.0.0.1--[04/Feb/201611:50:12]"GET/HTTP/1.1"200- $>curl-vhttp://localhost:8000/ #...Connectedtolocalhost(127.0.0.1)port8000(#0) >GET/HTTP/1.1 >Host:localhost:8000 >User-Agent:curl/7.47.0 >Accept:*/* > #HTTP1.0,assumecloseafterbody <HTTP/1.0200OK <Server:SimpleHTTP/0.6Python/2.7.10 <Date:Thu,04Feb201604:50:12GMT <Content-type:text/html;charset=mbcs <Content-Length:416 < <!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML3.2Final//EN"><html> ...Closingconnection0 19 / 24
- 20. Server #02 Fake POST importSimpleHTTPServer importSocketServer #--------------------------------------------------- classGetHandler(SimpleHTTPServer.SimpleHTTPRequestHandler) defdo_GET(self): printself.headers SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self) defdo_POST(self): printself.headers SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self) #--------------------------------------------------- PORT =8000 Handler=GetHandler httpd =SocketServer.TCPServer(("",PORT),Handler) #--------------------------------------------------- print"servingatport",PORT httpd.serve_forever() 20 / 24
- 22. Refs 22 / 24
- 23. Refs 1. SimpleHTTPServer - Simple HTTP request handler - Python documentation 2. BaseHTTPServer - Python Module of the Week 23 / 24
- 24. END Eueung Mulyana http://eueung.github.io/EL6240/http EL-6240 | Attribution-ShareAlike CC BY-SA 24 / 24