116 lines
3.3 KiB
Go
116 lines
3.3 KiB
Go
package server
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import (
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"context"
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"fmt"
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"heckel.io/ntfy/util"
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"io"
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"net/http"
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"net/netip"
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"strings"
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)
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func readBoolParam(r *http.Request, defaultValue bool, names ...string) bool {
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value := strings.ToLower(readParam(r, names...))
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if value == "" {
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return defaultValue
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}
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return value == "1" || value == "yes" || value == "true"
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}
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func readCommaSeparatedParam(r *http.Request, names ...string) (params []string) {
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paramStr := readParam(r, names...)
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if paramStr != "" {
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params = make([]string, 0)
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for _, s := range util.SplitNoEmpty(paramStr, ",") {
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params = append(params, strings.TrimSpace(s))
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}
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}
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return params
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}
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func readParam(r *http.Request, names ...string) string {
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value := readHeaderParam(r, names...)
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if value != "" {
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return value
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}
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return readQueryParam(r, names...)
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}
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func readHeaderParam(r *http.Request, names ...string) string {
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for _, name := range names {
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value := r.Header.Get(name)
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if value != "" {
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return strings.TrimSpace(value)
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}
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}
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return ""
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}
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func readQueryParam(r *http.Request, names ...string) string {
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for _, name := range names {
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value := r.URL.Query().Get(strings.ToLower(name))
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if value != "" {
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return strings.TrimSpace(value)
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}
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}
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return ""
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}
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func extractIPAddress(r *http.Request, behindProxy bool) netip.Addr {
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remoteAddr := r.RemoteAddr
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addrPort, err := netip.ParseAddrPort(remoteAddr)
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ip := addrPort.Addr()
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if err != nil {
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// This should not happen in real life; only in tests. So, using falling back to 0.0.0.0 if address unspecified
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ip, err = netip.ParseAddr(remoteAddr)
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if err != nil {
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ip = netip.IPv4Unspecified()
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if remoteAddr != "@" || !behindProxy { // RemoteAddr is @ when unix socket is used
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logr(r).Err(err).Warn("unable to parse IP (%s), new visitor with unspecified IP (0.0.0.0) created", remoteAddr)
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}
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}
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}
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if behindProxy && strings.TrimSpace(r.Header.Get("X-Forwarded-For")) != "" {
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// X-Forwarded-For can contain multiple addresses (see #328). If we are behind a proxy,
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// only the right-most address can be trusted (as this is the one added by our proxy server).
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// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For for details.
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ips := util.SplitNoEmpty(r.Header.Get("X-Forwarded-For"), ",")
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realIP, err := netip.ParseAddr(strings.TrimSpace(util.LastString(ips, remoteAddr)))
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if err != nil {
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logr(r).Err(err).Error("invalid IP address %s received in X-Forwarded-For header", ip)
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// Fall back to regular remote address if X-Forwarded-For is damaged
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} else {
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ip = realIP
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}
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}
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return ip
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}
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func readJSONWithLimit[T any](r io.ReadCloser, limit int, allowEmpty bool) (*T, error) {
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obj, err := util.UnmarshalJSONWithLimit[T](r, limit, allowEmpty)
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if err == util.ErrUnmarshalJSON {
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return nil, errHTTPBadRequestJSONInvalid
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} else if err == util.ErrTooLargeJSON {
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return nil, errHTTPEntityTooLargeJSONBody
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} else if err != nil {
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return nil, err
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}
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return obj, nil
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}
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func withContext(r *http.Request, ctx map[contextKey]any) *http.Request {
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c := r.Context()
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for k, v := range ctx {
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c = context.WithValue(c, k, v)
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}
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return r.WithContext(c)
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}
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func fromContext[T any](r *http.Request, key contextKey) T {
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t, ok := r.Context().Value(key).(T)
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if !ok {
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panic(fmt.Sprintf("cannot find key %v in request context", key))
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}
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return t
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}
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