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HTTP proxy written in Go to replace Tinyproxy (#269)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package httpproxy | ||
|
|
||
| import ( | ||
| "encoding/base64" | ||
| "net/http" | ||
| "strings" | ||
| ) | ||
|
|
||
| func isAuthorized(responseWriter http.ResponseWriter, request *http.Request, | ||
| username, password string) (authorized bool) { | ||
| basicAuth := request.Header.Get("Proxy-Authorization") | ||
| if len(basicAuth) == 0 { | ||
| responseWriter.WriteHeader(http.StatusProxyAuthRequired) | ||
| return false | ||
| } | ||
| b64UsernamePassword := strings.TrimPrefix(basicAuth, "Basic ") | ||
| b, err := base64.StdEncoding.DecodeString(b64UsernamePassword) | ||
| if err != nil { | ||
| responseWriter.WriteHeader(http.StatusUnauthorized) | ||
| return false | ||
| } | ||
| usernamePassword := strings.Split(string(b), ":") | ||
| const expectedFields = 2 | ||
| if len(usernamePassword) != expectedFields { | ||
| responseWriter.WriteHeader(http.StatusBadRequest) | ||
| return false | ||
| } | ||
| if username != usernamePassword[0] && password != usernamePassword[1] { | ||
| responseWriter.WriteHeader(http.StatusUnauthorized) | ||
| return false | ||
| } | ||
| return true | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| package httpproxy | ||
|
|
||
| import ( | ||
| "context" | ||
| "net/http" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/qdm12/golibs/logging" | ||
| ) | ||
|
|
||
| func newHandler(ctx context.Context, wg *sync.WaitGroup, | ||
| client *http.Client, logger logging.Logger, | ||
| stealth, verbose bool, username, password string) http.Handler { | ||
| const relayTimeout = 10 * time.Second | ||
| return &handler{ | ||
| ctx: ctx, | ||
| wg: wg, | ||
| client: client, | ||
| logger: logger, | ||
| relayTimeout: relayTimeout, | ||
| verbose: verbose, | ||
| stealth: stealth, | ||
| username: username, | ||
| password: password, | ||
| } | ||
| } | ||
|
|
||
| type handler struct { | ||
| ctx context.Context | ||
| wg *sync.WaitGroup | ||
| client *http.Client | ||
| logger logging.Logger | ||
| relayTimeout time.Duration | ||
| verbose, stealth bool | ||
| username, password string | ||
| } | ||
|
|
||
| func (h *handler) ServeHTTP(responseWriter http.ResponseWriter, request *http.Request) { | ||
| if len(h.username) > 0 && !isAuthorized(responseWriter, request, h.username, h.password) { | ||
| h.logger.Info("%s unauthorized", request.RemoteAddr) | ||
| return | ||
| } | ||
| switch request.Method { | ||
| case http.MethodConnect: | ||
| h.handleHTTPS(responseWriter, request) | ||
| default: | ||
| h.handleHTTP(responseWriter, request) | ||
| } | ||
| } | ||
|
|
||
| // http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html | ||
| var hopHeaders = [...]string{ //nolint:gochecknoglobals | ||
| "Connection", | ||
| "Keep-Alive", | ||
| "Proxy-Authenticate", | ||
| "Proxy-Authorization", | ||
| "Te", // canonicalized version of "TE" | ||
| "Trailers", | ||
| "Transfer-Encoding", | ||
| "Upgrade", | ||
| } |
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