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net/http: clarify panic conditions in Handle, HandleFunc, AddInsecureBypassPattern

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Add explicit mention that these methods panic on both pattern conflict
and invalid syntax.

Fixes #75226

Change-Id: If7dbfc44e1ec4624ab156f0e5d7e66cee2c2fef3
GitHub-Last-Rev: acc9a9c333
GitHub-Pull-Request: golang/go#75297
Reviewed-on: https://go-review.googlesource.com/c/go/+/701016
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Sean Liao <sean@liao.dev>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Sean Liao <sean@liao.dev>
Reviewed-by: Mark Freeman <markfreeman@google.com>
This commit is contained in:
Cole Garien 2025-09-13 17:54:40 +00:00 • committed by Gopher Robot
parent b9e2977f1d
commit aa83aee7de
2 changed files with 12 additions and 4 deletions
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4
src/net/http/csrf.go
View file

@ -90,6 +90,10 @@ var sentinelHandler Handler = &noopHandler{}
// would redirect to a pattern (e.g. after cleaning the path or adding a
// trailing slash) are not.
//
// AddInsecureBypassPattern panics if the pattern conflicts with one already
// registered, or if the pattern is syntactically invalid (for example, an
// improperly formed wildcard).
//
// AddInsecureBypassPattern can be called concurrently with other methods or
// request handling, and applies to future requests.
func (c *CrossOriginProtection) AddInsecureBypassPattern(pattern string) {

12
src/net/http/server.go
View file

@ -2868,8 +2868,10 @@ func (mux *ServeMux) ServeHTTP(w ResponseWriter, r *Request) {
// always refers to user code.
// Handle registers the handler for the given pattern.
// If the given pattern conflicts with one that is already registered, Handle
// panics.
// If the given pattern conflicts with one that is already registered
// or if the pattern is invalid, Handle panics.
//
// See [ServeMux] for details on valid patterns and conflict rules.
func (mux *ServeMux) Handle(pattern string, handler Handler) {
if use121 {
mux.mux121.handle(pattern, handler)
@ -2879,8 +2881,10 @@ func (mux *ServeMux) Handle(pattern string, handler Handler) {
}
// HandleFunc registers the handler function for the given pattern.
// If the given pattern conflicts with one that is already registered, HandleFunc
// panics.
// If the given pattern conflicts with one that is already registered
// or if the pattern is invalid, HandleFunc panics.
//
// See [ServeMux] for details on valid patterns and conflict rules.
func (mux *ServeMux) HandleFunc(pattern string, handler func(ResponseWriter, *Request)) {
if use121 {
mux.mux121.handleFunc(pattern, handler)