HTTP Cookies in .NET framework

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HTTP Cookies
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To manage HTTP cookies, create an opener object with an HTTPCookieProcessor handler added to it For example:
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cookiehand = HTTPCookieProcessor() opener = build_opener(cookiehand) u = openeropen("http://wwwexamplecom/")
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By default, the HTTPCookieProcessor uses the CookieJar object found in the httpcookiejar module Different types of cookie processing can be supported by supplying a different CookieJar object as an argument to HTTPCookieProcessor For example:
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cookiehand = HTTPCookieProcessor( httpcookiejarMozillaCookieJar("cookiestxt") ) opener = build_opener(cookiehand) u = openeropen("http://wwwexamplecom/")
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Proxies
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If requests need to be redirected through a proxy, create an instance of ProxyHandler
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ProxyHandler([proxies])
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Creates a proxy handler that routes requests through a proxyThe argument proxies is a dictionary that maps protocol names (for example, 'http', 'ftp', and so on) to the URLs of the corresponding proxy server
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22 Internet Application Programming
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The following example shows how to use this:
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proxy = ProxyHandler({'http': 'http://someproxycom:8080/'} auth = HTTPBasicAuthHandler() authadd_password("realm","host", "username", "password") opener = build_opener(proxy, auth) u = openeropen("http://wwwexamplecom/dochtml")
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urllibresponse
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This is an internal module that implements the file-like objects returned by functions in the urllibrequest moduleThere is no public API
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urllibparse
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The urllibparse module is used to manipulate URL strings such as "http://wwwpythonorg"
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URL Parsing (urlparse Module in Python 2)
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The general form of a URL is "scheme://netloc/ path;parameters query#fragment" In addition, the netloc part of a URL may include a port number such as "hostname:port" or user authentication information such as "user:pass@hostname"The following function is used to parse a URL:
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urlparse(urlstring [, default_scheme [, allow_fragments]])
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Parses the URL in urlstring and returns a ParseResult instance default_scheme specifies the scheme ("http", "ftp", and so on) to be used if none is present in the URL If allow_fragments is zero, fragment identifiers are not allowed A ParseResult instance r is a named tuple the form (scheme, netloc, path, parameters, query, fragment) However, the following read-only attributes are also defined:
Attribute
rscheme rnetloc rpath rparams rquery rfragment rusername rpassword rhostname rport
Description
URL scheme specifier (for example, 'http') Netloc specifier (for example, 'wwwpythonorg') Hierarchical path (for example, '/indexhtml') Parameters for the last path element Query string (for example, 'name=Dave&id=42') Fragment identifier without the leading '#' Username component if the netloc specifier is of the form 'username:password@hostname' Password component from the netloc specifier Host name component from the netloc specifier Port number from the netloc specifier if it is of the form 'hostname:port'
A ParseResult instance can be turned back into a URL string using rgeturl()
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urllib Package
urlunparse(parts)
Constructs a URL string from a tuple-representation of a URL as returned by urlparse() parts must be a tuple or iterable with six components
urlsplit(url [, default_scheme [, allow_fragments]])
The same as urlparse() except that the parameters portion of a URL is left unmodified in the pathThis allows for parsing of URLs where parameters might be attached to individual path components such as 'scheme://netloc/path1;param1/path2;param2/path3 query#fragment'The result is an instance of SplitResult, which is a named tuple containing (scheme, netloc, path, query, fragment)The following read-only attributes are also defined:
Attribute
rscheme rnetloc rpath rquery rfragment rusername rpassword rhostname rport
Description
URL scheme specifier (for example, 'http') Netloc specifier (for example, 'wwwpythonorg') Hierarchical path (for example, '/indexhtml') Query string (for example, 'name=Dave&id=42') Fragment identifier without the leading '#' Username component if the netloc specifier is of the form 'username:password@hostname' Password component from the netloc specifier Host name component from the netloc specifier Port number from the netloc specifier if it is of the form 'hostname:port'
A SplitResult instance can be turned back into a URL string using rgeturl()
urlunsplit(parts)
Constructs a URL from the tuple-representation created by urlsplit() parts is a tuple or iterable with the five URL components
urldefrag(url)
Returns a tuple (newurl, fragment) where newurl is url stripped of fragments and fragment is a string containing the fragment part (if any) If there are no fragments in url, then newurl is the same as url and fragment is an empty string
urljoin(base, url [, allow_fragments])
Constructs an absolute URL by combining a base URL, base, with a relative URL url allow_fragments has the same meaning as for urlparse() If the last component of the base URL is not a directory, it s stripped
parse_qs(qs [, keep_blank_values [, strict_parsing]])
Parses a URL-encoded (MIME type application/x-www-form-urlencoded) query string qs and returns a dictionary where the keys are the query variable names and the values are lists of values defined for each name keep_blank_values is a Boolean flag