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| author | Matt Holt <mholt@users.noreply.github.com> | 2021-02-22 11:57:21 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-02-22 11:57:21 -0700 |
| commit | 6722ae3a835702073682e020d8736140fc04538e (patch) | |
| tree | bc66fb7a9f1e4a085e2804a89f12722134394ca9 /modules/caddyhttp/replacer.go | |
| parent | edb362aa96bd8e79adfaca44fbd9f9ce5bff778d (diff) | |
reverseproxy: Add duration/latency placeholders (close #4012) (#4013)
* reverseproxy: Add duration/latency placeholders (close #4012) (and #2268)
Adds 4 placeholders, one is actually outside reverse proxy though:
{http.request.duration} is how long since the server decoded the HTTP request (headers).
{http.reverse_proxy.upstream.latency} is how long it took a proxy upstream to write the response header.
{http.reverse_proxy.upstream.duration} is total time proxying to the upstream, including writing response body to client.
{http.reverse_proxy.duration} is total time spent proxying, including selecting an upstream and retries.
Obviously, most of these are only useful at the end of a request, like when writing response headers or logs.
See also: https://caddy.community/t/any-equivalent-of-request-time-and-upstream-header-time-from-nginx/11418
* Add new placeholders to documentation
Diffstat (limited to 'modules/caddyhttp/replacer.go')
| -rw-r--r-- | modules/caddyhttp/replacer.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/modules/caddyhttp/replacer.go b/modules/caddyhttp/replacer.go index 5a0efce..d0767f0 100644 --- a/modules/caddyhttp/replacer.go +++ b/modules/caddyhttp/replacer.go @@ -36,6 +36,7 @@ import ( "path" "strconv" "strings" + "time" "github.com/caddyserver/caddy/v2" "github.com/caddyserver/caddy/v2/modules/caddytls" @@ -52,6 +53,8 @@ func NewTestReplacer(req *http.Request) *caddy.Replacer { } func addHTTPVarsToReplacer(repl *caddy.Replacer, req *http.Request, w http.ResponseWriter) { + SetVar(req.Context(), "start_time", time.Now()) + httpVars := func(key string) (interface{}, bool) { if req != nil { // query string parameters @@ -140,6 +143,9 @@ func addHTTPVarsToReplacer(repl *caddy.Replacer, req *http.Request, w http.Respo return dir, true case "http.request.uri.query": return req.URL.RawQuery, true + case "http.request.duration": + start := GetVar(req.Context(), "start_time").(time.Time) + return time.Since(start), true case "http.request.body": if req.Body == nil { return "", true |