Involved Source Files Package httpproxy provides support for HTTP proxy determination
based on environment variables, as provided by net/http's
The API is not subject to the Go 1 compatibility promise and may change at
Package-Level Type Names (only one)
/* sort by: | */
Config holds configuration for HTTP proxy settings. See
FromEnvironment for details. CGI holds whether the current process is running
as a CGI handler (FromEnvironment infers this from the
presence of a REQUEST_METHOD environment variable).
When this is set, ProxyForURL will return an error
when HTTPProxy applies, because a client could be
setting HTTP_PROXY maliciously. See https://golang.org/s/cgihttpproxy. HTTPProxy represents the value of the HTTP_PROXY or
http_proxy environment variable. It will be used as the proxy
URL for HTTP requests unless overridden by NoProxy. HTTPSProxy represents the HTTPS_PROXY or https_proxy
environment variable. It will be used as the proxy URL for
HTTPS requests unless overridden by NoProxy. NoProxy represents the NO_PROXY or no_proxy environment
variable. It specifies a string that contains comma-separated values
specifying hosts that should be excluded from proxying. Each value is
represented by an IP address prefix (126.96.36.199), an IP address prefix in
CIDR notation (188.8.131.52/8), a domain name, or a special DNS label (*).
An IP address prefix and domain name can also include a literal port
A domain name matches that name and all subdomains. A domain name with
a leading "." matches subdomains only. For example "foo.com" matches
"foo.com" and "bar.foo.com"; ".y.com" matches "x.y.com" but not "y.com".
A single asterisk (*) indicates that no proxying should be done.
A best effort is made to parse the string and errors are
ignored. ProxyFunc returns a function that determines the proxy URL to use for
a given request URL. Changing the contents of cfg will not affect
proxy functions created earlier.
A nil URL and nil error are returned if no proxy is defined in the
environment, or a proxy should not be used for the given request, as
defined by NO_PROXY.
As a special case, if req.URL.Host is "localhost" or a loopback address
(with or without a port number), then a nil URL and nil error will be returned.
func FromEnvironment() *Config
Package-Level Functions (only one)
FromEnvironment returns a Config instance populated from the
environment variables HTTP_PROXY, HTTPS_PROXY and NO_PROXY (or the
lowercase versions thereof).
The environment values may be either a complete URL or a
"host[:port]", in which case the "http" scheme is assumed. An error
is returned if the value is a different form.
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