Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS
Mirrored from https://github.com/Slazee/caddy.git
Synced Nov 11, 01:00 UTC
| 1 | package proxyprotocol |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "fmt" |
| 6 | "strings" |
| 7 | |
| 8 | goproxy "github.com/pires/go-proxyproto" |
| 9 | ) |
| 10 | |
| 11 | type Policy int |
| 12 | |
| 13 | // as defined in: https://pkg.go.dev/github.com/pires/go-proxyproto@v0.7.0#Policy |
| 14 | const ( |
| 15 | // IGNORE address from PROXY header, but accept connection |
| 16 | PolicyIGNORE Policy = iota |
| 17 | // USE address from PROXY header |
| 18 | PolicyUSE |
| 19 | // REJECT connection when PROXY header is sent |
| 20 | // Note: even though the first read on the connection returns an error if |
| 21 | // a PROXY header is present, subsequent reads do not. It is the task of |
| 22 | // the code using the connection to handle that case properly. |
| 23 | PolicyREJECT |
| 24 | // REQUIRE connection to send PROXY header, reject if not present |
| 25 | // Note: even though the first read on the connection returns an error if |
| 26 | // a PROXY header is not present, subsequent reads do not. It is the task |
| 27 | // of the code using the connection to handle that case properly. |
| 28 | PolicyREQUIRE |
| 29 | // SKIP accepts a connection without requiring the PROXY header |
| 30 | // Note: an example usage can be found in the SkipProxyHeaderForCIDR |
| 31 | // function. |
| 32 | PolicySKIP |
| 33 | ) |
| 34 | |
| 35 | var policyToGoProxyPolicy = map[Policy]goproxy.Policy{ |
| 36 | PolicyUSE: goproxy.USE, |
| 37 | PolicyIGNORE: goproxy.IGNORE, |
| 38 | PolicyREJECT: goproxy.REJECT, |
| 39 | PolicyREQUIRE: goproxy.REQUIRE, |
| 40 | PolicySKIP: goproxy.SKIP, |
| 41 | } |
| 42 | |
| 43 | var policyMap = map[Policy]string{ |
| 44 | PolicyUSE: "USE", |
| 45 | PolicyIGNORE: "IGNORE", |
| 46 | PolicyREJECT: "REJECT", |
| 47 | PolicyREQUIRE: "REQUIRE", |
| 48 | PolicySKIP: "SKIP", |
| 49 | } |
| 50 | |
| 51 | var policyMapRev = map[string]Policy{ |
| 52 | "USE": PolicyUSE, |
| 53 | "IGNORE": PolicyIGNORE, |
| 54 | "REJECT": PolicyREJECT, |
| 55 | "REQUIRE": PolicyREQUIRE, |
| 56 | "SKIP": PolicySKIP, |
| 57 | } |
| 58 | |
| 59 | // MarshalText implements the text marshaller method. |
| 60 | func (x Policy) MarshalText() ([]byte, error) { |
| 61 | return []byte(policyMap[x]), nil |
| 62 | } |
| 63 | |
| 64 | // UnmarshalText implements the text unmarshaller method. |
| 65 | func (x *Policy) UnmarshalText(text []byte) error { |
| 66 | name := string(text) |
| 67 | tmp, err := parsePolicy(name) |
| 68 | if err != nil { |
| 69 | return err |
| 70 | } |
| 71 | *x = tmp |
| 72 | return nil |
| 73 | } |
| 74 | |
| 75 | func parsePolicy(name string) (Policy, error) { |
| 76 | if x, ok := policyMapRev[strings.ToUpper(name)]; ok { |
| 77 | return x, nil |
| 78 | } |
| 79 | return Policy(0), fmt.Errorf("%s is %w", name, errInvalidPolicy) |
| 80 | } |
| 81 | |
| 82 | var errInvalidPolicy = errors.New("invalid policy") |