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91 lines
2.8 KiB
Plaintext
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Web Sniffer
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by Erik van der Poel <erik@netscape.com>
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originally created in 1998
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Introduction
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This is a set of tools to work with the protocols underlying the Web.
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Description of Tools
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view.cgi
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This is an HTML form that allows the user to enter a URL. The CGI then
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fetches the object associated with that URL, and presents it to the
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user in a colorful way. For example, HTTP headers are shown, HTML
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documents are parsed and colored, and non-ASCII characters are shown in
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hex. Links are turned into live links, that can be clicked to see the
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source of that URL, allowing the user to "browse" source.
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robot
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Originally written to see how many documents actually include the HTTP
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and HTML charsets, this tool has developed into a more general robot
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that collects various statistics, including HTML tag statistics, DNS
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lookup timing, etc. This robot does not adhere to the standard robot
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rules, so please exercise caution if you use this.
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proxy
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This is an HTTP proxy that sits between the user's browser and another
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HTTP proxy. It captures all of the HTTP traffic between the browser and
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the Internet, and presents it to the user in the same colorful way as
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the above-mentioned view.cgi.
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grab
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Allows the user to "grab" a whole Web site, or everything under a
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particular directory. This is useful if you want to grab a bunch of
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related HTML files, e.g. the whole CSS2 spec.
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link
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Allows the user to recursively check for bad links in a Web site or
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under a particular directory.
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Description of Files
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addurl.c, addurl.h: adds URLs to a list
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cgiview.c, cgiview.html: the view.cgi tool
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dns.c: experimental DNS toy
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doRun: used with robot
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file.c, file.h: the file: URL
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ftp.c: experimental FTP toy
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grab.c: the "grab" tool
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hash.c, hash.h: incomplete hash table routines
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html.c, html.h: HTML parser
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http.c, http.h: simple HTTP implementation
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io.c, io.h: I/O routines
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link.c: the "link" tool
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main.h: very simple callbacks, could be more object-oriented
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Makefile: the Solaris Makefile
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mime.c, mime.h: MIME Content-Type parser
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mutex.h: for threading in the robot
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net.c, net.h: low-level Internet APIs
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pop.c: experimental POP toy
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proxy.c: the "proxy" tool
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robot.c: the "robot" tool
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run: used with robot
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TODO: notes to myself
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url.c, url.h: implementation of absolute and relative URLs
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utils.c, utils.h: some little utility routines
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view.c, view.h: presents stuff to the user
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Description of Code
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The code is extremely quick-and-dirty. It could be a lot more elegant,
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e.g. C++, object-oriented, extensible, etc.
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The point of this exercise was not to design and write a program well,
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but to create some useful tools and to learn about Internet protocols.
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