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Refine logic

This commit is contained in:
binwiederhier 2023-09-24 17:59:23 -04:00
parent 4818ee57b6
commit d9387dac99
4 changed files with 57 additions and 33 deletions

View file

@ -329,6 +329,27 @@ func TestServer_PublishPriority(t *testing.T) {
require.Equal(t, 40007, toHTTPError(t, response.Body.String()).Code)
}
func TestServer_PublishPriority_SpecialHTTPHeader(t *testing.T) {
s := newTestServer(t, newTestConfig(t))
response := request(t, s, "POST", "/mytopic", "test", map[string]string{
"Priority": "u=4",
"X-Priority": "5",
})
require.Equal(t, 5, toMessage(t, response.Body.String()).Priority)
response = request(t, s, "POST", "/mytopic?priority=4", "test", map[string]string{
"Priority": "u=9",
})
require.Equal(t, 4, toMessage(t, response.Body.String()).Priority)
response = request(t, s, "POST", "/mytopic", "test", map[string]string{
"p": "2",
"priority": "u=9, i",
})
require.Equal(t, 2, toMessage(t, response.Body.String()).Priority)
}
func TestServer_PublishGETOnlyOneTopic(t *testing.T) {
// This tests a bug that allowed publishing topics with a comma in the name (no ticket)

View file

@ -8,11 +8,14 @@ import (
"mime"
"net/http"
"net/netip"
"strings"
"regexp"
"strings"
)
var mimeDecoder mime.WordDecoder
var (
mimeDecoder mime.WordDecoder
priorityHeaderIgnoreRegex = regexp.MustCompile(`^u=\d,\s*(i|\d)$|^u=\d$`)
)
func readBoolParam(r *http.Request, defaultValue bool, names ...string) bool {
value := strings.ToLower(readParam(r, names...))
@ -51,9 +54,9 @@ func readParam(r *http.Request, names ...string) string {
func readHeaderParam(r *http.Request, names ...string) string {
for _, name := range names {
value := maybeDecodeHeader(r.Header.Get(name), name)
value := strings.TrimSpace(maybeDecodeHeader(name, r.Header.Get(name)))
if value != "" {
return strings.TrimSpace(value)
return value
}
}
return ""
@ -127,29 +130,25 @@ func fromContext[T any](r *http.Request, key contextKey) (T, error) {
return t, nil
}
func maybeDecodeHeader(header string, name string) string {
decoded, err := mimeDecoder.DecodeHeader(header)
// maybeDecodeHeader decodes the given header value if it is MIME encoded, e.g. "=?utf-8?q?Hello_World?=",
// or returns the original header value if it is not MIME encoded. It also calls maybeIgnoreSpecialHeader
// to ignore new HTTP "Priority" header.
func maybeDecodeHeader(name, value string) string {
decoded, err := mimeDecoder.DecodeHeader(value)
if err != nil {
if name == "priority"{
return cloudflarePriorityIgnore(header)
}
return header
return maybeIgnoreSpecialHeader(name, value)
}
if name == "priority"{
return cloudflarePriorityIgnore(decoded)
}
return decoded
return maybeIgnoreSpecialHeader(name, decoded)
}
// Ignore new HTTP Priority header (see https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-priority)
// Cloudflare adds this to requests when forwarding to the backend (ntfy), so we just ignore it.
// If the Priority header is set to "u=*, i" or "u=*" (by cloudflare), the header will be ignored.
// And continue searching for another header (x-priority, prio, p) or in the Query parameters.
func cloudflarePriorityIgnore(value string) string {
pattern := `^u=\d,\s(i|\d)$|^u=\d$`
regex := regexp.MustCompile(pattern)
if regex.MatchString(value) {
// maybeIgnoreSpecialHeader ignores new HTTP "Priority" header (see https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-priority)
//
// Cloudflare (and potentially other providers) add this to requests when forwarding to the backend (ntfy),
// so we just ignore it. If the "Priority" header is set to "u=*, i" or "u=*" (by Cloudflare), the header will be ignored.
// Returning an empty string will allow the rest of the logic to continue searching for another header (x-priority, prio, p),
// or in the Query parameters.
func maybeIgnoreSpecialHeader(name, value string) string {
if strings.ToLower(name) == "priority" && priorityHeaderIgnoreRegex.MatchString(strings.TrimSpace(value)) {
return ""
}
return value

View file

@ -2,9 +2,9 @@ package server
import (
"bytes"
"crypto/rand"
"fmt"
"github.com/stretchr/testify/require"
"math/rand"
"net/http"
"strings"
"testing"
@ -75,3 +75,16 @@ Accept: */*
(peeked bytes not UTF-8, peek limit of 4096 bytes reached, hex: ` + fmt.Sprintf("%x", body[:4096]) + ` ...)`
require.Equal(t, expected, renderHTTPRequest(r))
}
func TestMaybeIgnoreSpecialHeader(t *testing.T) {
require.Empty(t, maybeIgnoreSpecialHeader("priority", "u=1"))
require.Empty(t, maybeIgnoreSpecialHeader("Priority", "u=1"))
require.Empty(t, maybeIgnoreSpecialHeader("Priority", "u=1, i"))
}
func TestMaybeDecodeHeaders(t *testing.T) {
r, _ := http.NewRequest("GET", "http://ntfy.sh/mytopic/json?since=all", nil)
r.Header.Set("Priority", "u=1") // Cloudflare priority header
r.Header.Set("X-Priority", "5") // ntfy priority header
require.Equal(t, "5", readHeaderParam(r, "x-priority", "priority", "p"))
}

View file

@ -87,15 +87,6 @@ func TestParsePriority_Invalid(t *testing.T) {
}
}
func TestParsePriority_HTTPSpecPriority(t *testing.T) {
priorities := []string{"u=1", "u=3", "u=7, i"} // see https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-priority
for _, priority := range priorities {
actual, err := ParsePriority(priority)
require.Nil(t, err)
require.Equal(t, 3, actual) // Always expect 3!
}
}
func TestPriorityString(t *testing.T) {
priorities := []int{0, 1, 2, 3, 4, 5}
expected := []string{"default", "min", "low", "default", "high", "max"}