Tài liệu Web Client Programming with Perl-Chapter 3: Learning HTTP- P1 pdf
Tài liệu Web Client Programming with Perl-Chapter 3: Learning HTTP- P1 pdf
... URL-encoded format to retrieve
the values entered by the user.
File uploads with POST
Chapter 3: Learning HTTP- P1
In the previous chapter, we went through a few examples of HTTP
transactions ... that it seemed best to present it this way.
Client Request Methods
A client request method is a "command" or "request" that a web client issues
to a serve...
Tài liệu Web Client Programming with Perl-Chapter 3: Learning HTTP- P2 pdf
... data with
PUT.
In practice, a web server may request authorization from the client. Most
webmasters won't allow any arbitrary client to publish documents on the
server. When prompted with ... the
client may continue with its request.
101 Switching
Protocols:
The server is complying with a client request to switch
protocols to the one specified in the Upgrade head...
Tài liệu Web Client Programming with Perl-Chapter 7: Graphical Examples with Perl/Tk- P4 docx
... Graphical Examples with Perl/Tk- P4
Check if Servers Are up: webping
For the last example, we'll build a GUI interface that will allow us to check
and see if several web sites are running, ... similar to the UNIX ping command, we call it webping. This
application would be useful to a web administrator who had to keep track of
many different web sites, and wanted to know wh...
Tài liệu Web Client Programming with Perl-Chapter 2: Demystifying the Browser-P1 pdf
... 2: Demystifying the Browser -P1
Before you start writing your own web programs, you have to become
comfortable with the fact that your web browser is just another client. Lots
of complex things ...
rendering. But all of that is gravy; without actually negotiating with web
servers and retrieving documents via HTTP, the browser would be as useless
as a TV without a tuner.
HTT...
Tài liệu Web Client Programming with Perl-Chapter 2: Demystifying the Browser-P2 doc
... structure of a client request.
Figure 2-10. Structure of a client request
HTTP transactions do not need to use all the headers. In fact, it is possible to
perform some HTTP requests without supplying ... GET / HTTP/1.0 with an empty header is sufficient for
most servers to understand the client.
HTTP requests have the following general components:
1. The first line tells the...
Tài liệu ANALOG BEHAVIORAL MODELING WITH THE VERILOG-A LANGUAGE- P1 pdf
... 4.
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ANALOG
BEHAVIORAL MODELING
WITH THE VERILOG-A LANGUAGE
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Product Design Methodologies
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Tài liệu Chapter 1:Introduction- Web Client Programming with Perl doc
... 1:Introduction- Web Client
Programming with Perl
So what does Web client programming mean, and what do you need to learn
to do it?
A web client is an application that communicates with a web server, ... new page
appeared.
Clients and Servers
Your web browser is an example of a web client. The remote machine
containing the document you requested is called a w...
Web Client Programming with Perl-Chapter 3: Learning HTTP- P3
... 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 to
use with ... header. Clients use
this information to correctly handle the media type and format of the entity-
body.
A client might also use a Content-type header with the POST or PUT
method. Mo...
Web Client Programming with Perl-Chapter 4: The Socket Library- P1
... not fully 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 ... character is '^'.
Tue Jun 14 00: 03:1 2 1996
Connection closed by foreign host.
Your First Web Client
Let's modify the previous code to work with a web serve...
Web Client Programming with Perl-Chapter 4: The Socket Library- P2
... your client. In the event of a redirection, will your client handle it?
Does it examine the Location header? The answers to these
questions depend on the purpose of the client.
Does the client ... Socket; # include Socket
module
require 'tcp.pl'; # file with Open_TCP
routine
require &apos ;web. pl'; # file with parseURL
routine
use vars qw($opt_h $opt_i $opt_...
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