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Diffstat (limited to 'vendor/golang.org/x/net/http2/server.go')
| -rw-r--r-- | vendor/golang.org/x/net/http2/server.go | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/vendor/golang.org/x/net/http2/server.go b/vendor/golang.org/x/net/http2/server.go index c67e9b7f..e644d9b2 100644 --- a/vendor/golang.org/x/net/http2/server.go +++ b/vendor/golang.org/x/net/http2/server.go @@ -719,7 +719,15 @@ func (sc *serverConn) canonicalHeader(v string) string { sc.canonHeader = make(map[string]string) } cv = http.CanonicalHeaderKey(v) - sc.canonHeader[v] = cv + // maxCachedCanonicalHeaders is an arbitrarily-chosen limit on the number of + // entries in the canonHeader cache. This should be larger than the number + // of unique, uncommon header keys likely to be sent by the peer, while not + // so high as to permit unreasonable memory usage if the peer sends an unbounded + // number of unique header keys. + const maxCachedCanonicalHeaders = 32 + if len(sc.canonHeader) < maxCachedCanonicalHeaders { + sc.canonHeader[v] = cv + } return cv } |