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-rw-r--r--modules/caddyhttp/matchers.go15
-rw-r--r--modules/caddyhttp/reverseproxy/healthchecks.go8
2 files changed, 19 insertions, 4 deletions
diff --git a/modules/caddyhttp/matchers.go b/modules/caddyhttp/matchers.go
index e39ba3f..93c7e69 100644
--- a/modules/caddyhttp/matchers.go
+++ b/modules/caddyhttp/matchers.go
@@ -123,6 +123,7 @@ type (
// keyed by the query keys, with an array of string values to match for that key.
// Query key matches are exact, but wildcards may be used for value matches. Both
// keys and values may be placeholders.
+ //
// An example of the structure to match `?key=value&topic=api&query=something` is:
//
// ```json
@@ -135,6 +136,13 @@ type (
//
// Invalid query strings, including those with bad escapings or illegal characters
// like semicolons, will fail to parse and thus fail to match.
+ //
+ // **NOTE:** Notice that query string values are arrays, not singular values. This is
+ // because repeated keys are valid in query strings, and each one may have a
+ // different value. This matcher will match for a key if any one of its configured
+ // values is assigned in the query string. Backend applications relyon on query
+ // strings MUST take into consideration that query string values are arrays and can
+ // have multiple values.
MatchQuery url.Values
// MatchHeader matches requests by header fields. The key is the field
@@ -144,6 +152,13 @@ type (
// surrounding the value with the wildcard `*` character, respectively.
// If a list is null, the header must not exist. If the list is empty,
// the field must simply exist, regardless of its value.
+ //
+ // **NOTE:** Notice that header values are arrays, not singular values. This is
+ // because repeated fields are valid in headers, and each one may have a
+ // different value. This matcher will match for a field if any one of its configured
+ // values matches in the header. Backend applications relying on headers MUST take
+ // into consideration that header field values are arrays and can have multiple
+ // values.
MatchHeader http.Header
// MatchHeaderRE matches requests by a regular expression on header fields.
diff --git a/modules/caddyhttp/reverseproxy/healthchecks.go b/modules/caddyhttp/reverseproxy/healthchecks.go
index cf22d26..e4c732a 100644
--- a/modules/caddyhttp/reverseproxy/healthchecks.go
+++ b/modules/caddyhttp/reverseproxy/healthchecks.go
@@ -46,10 +46,10 @@ type HealthChecks struct {
// Passive health checks monitor proxied requests for errors or timeouts.
// To minimally enable passive health checks, specify at least an empty
- // config object. Passive health check state is shared (stored globally),
- // so a failure from one handler will be counted by all handlers; but
- // the tolerances or standards for what defines healthy/unhealthy backends
- // is configured per-proxy-handler.
+ // config object with fail_duration > 0. Passive health check state is
+ // shared (stored globally), so a failure from one handler will be counted
+ // by all handlers; but the tolerances or standards for what defines
+ // healthy/unhealthy backends is configured per-proxy-handler.
//
// Passive health checks technically do operate on dynamic upstreams,
// but are only effective for very busy proxies where the list of