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HTTP-Klasse

Diese Klasse stellt einige sehr, sehr einfache Methoden für den Umgang mit GET- und POST-Requests bereit. Sie bietet weder Cookie-Management noch die automatische Behandlung von Weiterleitungen (HTTP 30_).

# -*- coding:iso-8859-15 -*-

import urllib  # urlencode
import httplib # HTTPConnection
import random  # randint

USER_AGENT = "Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12"

ERROR_MESSAGES = {
    100:"Continue",
    101:"Switching protocols",
    
    200:"OK",
    201:"Created",
    202:"Accepted",
    203:"Non-authoritative information",
    204:"No content",
    206:"Partial content",
    
    300:"Multiple Choices",
    301:"Moved permanently",
    302:"Found",
    303:"See other",
    304:"Not modified",
    305:"Use proxy",
    307:"Moved temporarily",
    
    400:"Bad request",
    401:"Unauthorized",
    402:"Payment required",
    403:"Forbidden",
    404:"Not found",
    405:"Method not allowed",
    406:"Not acceptable",
    407:"Proxy authentification required",
    408:"Request time-out",
    409:"Conflict",
    410:"Gone",
    411:"Length required",
    412:"Precondition failed",
    413:"Request Entity Too Large",
    414:"Request URL too long",
    415:"Unsupported media type",
    416:"Request range not satisfiable",
    417:"Expectation failed",
    424:"Site too ugly",
    
    500:"Internal Server Error",
    501:"Not implemented",
    502:"Bad gateway",
    503:"Service unavailible",
    504:"Gateway time-out",
    505:"HTTP version not supported"
}

class Error(Exception):
    def __init__(self,code,content):
        self.code    = code
        self.message = ERROR_MESSAGES[code]
        self.content = content
        
class HTTP:
    """ Eine einfache HTTP-Klasse """
    
    
    def __init__(self,host,ua,https=False):
        self.host    = host
        self.ua      = ua
        self.headers = {}
        self.secure  = https
        self.status  = 0
    
    
    def get(self,path="/",data={},headers={}):
        if self.secure:
            conn = httplib.HTTPSConnection(self.host)
        else:
            conn = httplib.HTTPConnection(self.host)
        
        data = urllib.urlencode(data)
        
        headers["User-Agent"] = self.ua
        headers["Connection"] = "close"
        
        conn.request("GET",path+"?"+data,{},headers)
        response = conn.getresponse()
        conn.close()
        
        self.headers = {}
        
        if response.status >= 400:
            raise Error,(response.status,response.read())
        
        self.content = response.read()
        self.headers = response.getheaders()
        self.status  = response.status
        
        return True
    
    def post(self,path,getdata={},postdata={},headers={}):
        if self.secure:
            conn = httplib.HTTPSConnection(self.host)
        else:
            conn = httplib.HTTPConnection(self.host)
        
        getdata  = urllib.urlencode(getdata)
        postdata = urllib.urlencode(postdata)
        
        headers["Content-Type"] = "application/x-www-form-urlencoded"
        headers["User-Agent"]   = self.ua
        headers["Connection"]   = "close"
        
        conn.request("POST",path+"?"+getdata,postdata,headers)
        response = conn.getresponse()
        conn.close()
        
        self.headers = {}
        
        if response.status >= 400:
            raise Error,(response.status,response.read())
        
        self.content = response.read()
        self.headers = response.getheaders()
        self.status  = response.status
        
        return True
    
    
    def getContent(self):
        return self.content
    
    def getHeader(self,name):
        for header in self.headers:
            if header[0].lower() == name.lower():
                return header[1]
        return ""

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