"Proxies" are special-purpose HTTP servers designed to transfer data
from remote servers to local clients. One typical use of proxies is
lightening network load for users behind a slow connection. This is
achieved by channeling all HTTP and FTP requests through the proxy
which caches the transferred data. When a cached resource is requested
again, proxy will return the data from cache. Another use for proxies
is for companies that separate (for security reasons) their internal
networks from the rest of Internet. In order to obtain information
from the Web, their users connect and retrieve remote data using an
Wget supports proxies for both HTTP and FTP retrievals. The
standard way to specify proxy location, which Wget recognizes, is using
the following environment variables:
This variable should contain the URL of the proxy for HTTP
This variable should contain the URL of the proxy for FTP
connections. It is quite common that HTTP_PROXY and FTP_PROXY are
set to the same URL.
This variable should contain a comma-separated list of domain
extensions proxy should _not_ be used for. For instance, if the
value of `no_proxy' is `.mit.edu', proxy will not be used to
retrieve documents from MIT.
In addition to the environment variables, proxy location and settings
may be specified from within Wget itself.
`proxy = on/off'
This option may be used to turn the proxy support on or off. Proxy
support is on by default, provided that the appropriate environment
variables are set.
`http_proxy = URL'
`ftp_proxy = URL'
`no_proxy = STRING'
These startup file variables allow you to override the proxy
settings specified by the environment.
Some proxy servers require authorization to enable you to use them.
The authorization consists of "username" and "password", which must be
sent by Wget. As with HTTP authorization, several authentication
schemes exist. For proxy authorization only the `Basic' authentication
scheme is currently implemented.
You may specify your username and password either through the proxy
URL or through the command-line options. Assuming that the company's
proxy is located at `proxy.company.com' at port 8001, a proxy URL
location containing authorization data might look like this:
Alternatively, you may use the `proxy-user' and `proxy-password'
options, and the equivalent `.wgetrc' settings `proxy_user' and
`proxy_passwd' to set the proxy username and password.
automatically generated byinfo2html