Web Client Programming with Perl-Chapter 5: The LWP Library- P2
Web Client Programming with Perl-Chapter 5: The LWP Library- P2
... Since we're
programming a web robot, the name of the robot and the email address of
the user are mandatory. So, we pass that information to the LWP: :RobotUA
object through the constructor. ... invoked with no parameters, this returns the default port for the
URL defined in the object. The default port is based on the scheme
used. Even if the port for t...
Tài liệu Web Client Programming with Perl-Chapter 3: Learning HTTP- P2 pdf
... image/jpeg
The proxy then examines the URL, contacts www.ora.com, forwards the
client& apos;s request, and then returns the response from the server to the original
client. When forwarding the request ...
on both the inside and outside of the firewall. Computers on the inside of a
firewall initiate requests with the proxy, and the proxy then communicates to
the...
Web Client Programming with Perl-Chapter 5: The LWP Library- P1
... useful for
client programming.
The LWP Module
The LWP module, in the context of web clients, performs client requests
over the network. There are 10 classes in all within the LWP module, ... a client/ server negotiation.
The LWP module is the core of all web client programs. It allows the
client to communicate over the network with the server....
Web Client Programming with Perl-Chapter 4: The Socket Library- P1
... compliant with the HTTP specs, the web server won't
understand you! Perhaps your web client works with one web server but not
another. Or maybe your web client works most of the time, ... assign the socket to a particular port on the host. The server
then uses the listen( ) and accept( ) routines to establish communication on
that port.
On the other e...
Web Client Programming with Perl-Chapter 4: The Socket Library- P2
... example, if the URL used by the client
becomes obsolete or is changed, the client may interpret the entity-
body incorrectly. Media types for the URL may change, and could be
noticed in the HTTP ... not at the location specified
by your client. In the event of a redirection, will your client handle it?
Does it examine the Location header? The answers to these
q...
Web Client Programming with Perl-Chapter 6: Example LWP Programs-P1
... > tags in the response.
4. If "Delivered To : " shows up in the reply (with or without text after
the colon), the query was successful but the document is not at the
destination ... $ua->request($request);
They both do the same thing; they request a document from a user-specified
web server and identify themselves in the User-Agent header. But one looks...
Web Client Programming with Perl-Chapter 6: Example LWP Programs-P2
... Example LWP Programs -P2
Then the scan( ) method does all the real work. The scan( ) method accepts a
URL as a parameter. In a nutshell, here's what happens:
The scan( ) method pushes the ... For the not _web( ), local( ), and remote( )
methods, a similar associative array is returned, where the URL is a key in
the array and denotes that the URL is not HTTP-base...
Tài liệu Web Client Programming with Perl-Chapter 2: Demystifying the Browser-P1 pdf
... example, the browser
is given the following URL:
http://hypothetical.ora.com/
The browser interprets the URL as follows:
http://
In the first part of the URL, you told the browser to use HTTP, the ... In the third line, beginning with the string User-Agent, the client
identifies itself as Mozilla (Netscape) version 3.0, running on
Windows NT.
4. The fourth l...
Tài liệu Web Client Programming with Perl-Chapter 2: Demystifying the Browser-P2 doc
... server response
In the server response, the general header and entity headers are the same as
those used in the client request. The entity-body is like the one used in the
client request, except ... is using. The status code
indicates the result of the request, and the reason phrase is a human-readable
description of the status-code.
The response header t...
Web Client Programming with Perl-Chapter 3: Learning HTTP- P3
... document, the web client requests the document
without sending an Authorization header. If the server denies access to
the document, the server specifies the authorization method for the client ... accommodate client- side caching of documents, the client can use the If-
Modified-Since header with the GET method. When using this option, the
client requests...
Từ khóa:
- chapter 11 web server programming with mod perl
- chapter 17 the lwp library
- creating the web client
- programming with the kinect
- just enough web programming with xhtml
- the essence of object oriented programming with java and uml pdf
- the essence of object oriented programming with java and uml
- just enough web programming with xhtml php and mysql download
- just enough web programming with xhtml php and mysql pdf