Response code 304?

1. Caddy version (caddy version):


2. How I run Caddy:

./caddy start

a. System environment:

MacOS 10.14.6

b. Command:

./caddy start

paste command here

c. Service/unit/compose file:

paste full file contents here

d. My complete Caddyfile or JSON config:, http://localhost:4000 {
    root * /Users/joe/caddy/public_html
    log {
        output file http.log
        format logfmt

3. The problem I’m having:

I notice the log shows status returned is either 200 or 304.
304 is consistent on the pages that return it.

4. Error messages and/or full log output:

2020/05/11 02:32:04.805 INFO http.log.access.log0 handled request {“request”: {“method”: “GET”, “uri”: “/assets/home1.css”, “proto”: “HTTP/1.1”, “remote_addr”: “”, “host”: “”, “headers”: {“Cookie”: ["_ga=GA1.1.1753940845.1588802039; _gid=GA1.1.883587341.1589153575; _vianet2_session=elJjVTlNaTlZeTBuQldkSTEzNno1NURJemJVM1JBMS85SnZqZHErbkdVUWRmNFNTVjZjelpjTUpTWjBobVZnWVF1aFR3WHVpQ2dFQ0hSTnc3R3h1V1htWEZXYWF2M003Qk9iTG5JSnBxbEJWQTJuWXQrM0p1V2RDQWlVcVdzZ0lPWmwva0FPQk8rbzRBQmxHVmFXYVN3PT0tLVNqL2NqSDNOaWRBZmowK0R5WmVsckE9PQ%3D%3D–2a74409d890dd848ecf9e0fcbbf2006489787bac"], “Connection”: [“keep-alive”], “If-None-Match”: ["“qa5amc1kr”"], “Accept”: [“text/css,/;q=0.1”], “If-Modified-Since”: [“Mon, 11 May 2020 02:23:00 GMT”], “User-Agent”: [“Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Safari/605.1.15”], “Referer”: [“”], “Accept-Language”: [“en-us”], “Accept-Encoding”: [“gzip, deflate”]}}, “common_log”: “ - - [10/May/2020:19:32:04 -0700] “GET /assets/home1.css HTTP/1.1” 304 0”, “latency”: 0.000098316, “size”: 0, “status”: 304, “resp_headers”: {“Etag”: ["“qa5amc1kr”"], “Server”: [“Caddy”]}}

ts=1589164324.805217 level=info msg=“handled request” requestError=“unsupported value type” common_log=“ - - [10/May/2020:19:32:04 -0700] “GET /assets/home1.css HTTP/1.1” 304 0” latency=0.000098316 size=0 status=304 resp_headersError=“unsupported value type”

5. What I already tried:

6. Links to relevant resources:

From the Mozilla web docs:

The HTTP 304 Not Modified client redirection response code indicates that there is no need to retransmit the requested resources. It is an implicit redirection to a cached resource. This happens when the request method is safe, like a GET or a HEAD request, or when the request is conditional and uses a If-None-Match or a If-Modified-Since header.

The equivalent 200 OK response would have included the headers Cache-Control , Content-Location , Date , ETag , Expires , and Vary .

304 Not Modified - HTTP | MDN

Basically, when your browser re-requests the same file, it sends If-Modified-Since and Caddy’s file server can say “nope, the file hasn’t been modified since you last checked, your cached copy is still good” (this is Status 304).


So it’s nothing to worry about? It’s not actually an error code?



My server say’s it’s version is ‘(devel)’. Ever consider marking the devel versions with a date code?

1 Like

Yes, Status 3xx are not errors, they are (all?) redirections. 304 is a “redirection” to the asset your browser has already cached.

The devel versions are properly versioned (to the git commit) if you build it as a dependency, or with xcaddy.

Due to a bug in Go, these basic steps do not embed version information. If you want the version ( caddy version ), you need to compile Caddy as a dependency rather than as the main module. Instructions for this are in Caddy’s main.go file. Or, you can use xcaddy which automates this.

Build from source — Caddy Documentation

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