Re: Combination of --unix-socket and --proxy http://...

> Am 15.05.2026 um 12:05 schrieb Fabian Keil via curl-library <[email protected]>:
> 
> After updating git master today I noticed that tests
> 1435 and 1436 fail when trying to run them through Privoxy's
> test framework.
> 
> I have not yet bisected to see why the tests fail now and
> appeared to work previously but suspect that Privoxy silently
> wasn't being used and I just wasn't aware of it.
> 
> Currently the failure for test 1435 looks like this:
> 
>    fk@t520 ~ $~/git/privoxy/tests/cts/run-privoxy-tests.sh -t upstream-tests -- -v 1435
>    Passing remaining arguments to runtests-wrapper.sh: -v 1435
>    Test scenario: upstream-tests
>    Not setting TESTDIR
>    Using curl: /home/fk/git/curl/src/curl
>    CMD (0): /home/fk/git/curl/src/curl --version 1>log/curlverout.log 2>log/curlvererr.log
>    ********* System characteristics ******** 
>    * curl 8.21.0-DEV (amd64-unknown-freebsd15.1) 
>    * libcurl/8.21.0-DEV OpenSSL/3.0.19 zlib/1.3.2 brotli/1.2.0 zstd/1.5.7 libidn2/2.3.8 libpsl/0.21.5 nghttp2/1.68.1
>    * Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns mqtt mqtts pop3 pop3s smtp smtps telnet tftp ws wss
>    * Features: alt-svc AsynchDNS brotli Debug HSTS HTTP2 HTTPS-proxy IDN IPv6 Largefile libz PSL SSL threadsafe TLS-SRP UnixSockets zstd
>    * Disabled: win32-ca-searchpath, win32-ca-search-safe, override-dns, ssl-sessions
>    * Host: t520.local
>    * System: ElectroBSD t520.local 15.1-STABLE ElectroBSD 15.1-STABLE #64 electrobsd-15-n283851-9c91bf3b2a6e: 2026-05-13 00:59:16 +0000     [email protected]:/usr/obj/usr/src/amd64.amd64/sys/ELECTRO_BEER amd64
>    * OS: freebsd
>    * Perl: v5.42.2 (/usr/local/bin/perl)
>    * Args: -c /home/fk/git/curl/src/curl -L /home/fk/git/privoxy/tests/cts/privoxy-runtests.pm -P http://127.0.0.1:9119/ -E /home/fk/git/privoxy/tests/cts/curl-test-manifest-for-privoxy -a -n HTTP !skip HTTP -v 1435
>    * Seed: 260565
>    * Servers: SSL HTTP-IPv6 HTTP-unix FTP-IPv6 
>    ***************************************** 
>    DISABLED: test 323
>    DISABLED: test 594
>    DISABLED: test 836
>    DISABLED: test 882
>    DISABLED: test 938
>    DISABLED: test 1182
>    DISABLED: test 1184
>    DISABLED: test 1209
>    DISABLED: test 1211
>    DISABLED: test 1307
>    DISABLED: test 1316
>    DISABLED: test 1512
>    DISABLED: test 1801
>    DISABLED: test 2043
>    startnew: /usr/local/bin/perl -I. -I. ./http-server.pl --keepalive 30 --pidfile "log/server/http_unix_server.pid" --logfile "log/http_unix_server.log" --logdir "log" --portfile log/server/http_unix_server.port --config log/server.cmd --unix-socket '/home/fk/git/curl/tests/log/server/http-uds' --srcdir "."
>    RUN: HTTP-unix server is on PID 28 port 8999
>    * pid http-unix => 28 28
>    test 1435...[simple HTTP GET over Unix socket]
>    /home/fk/git/curl/src/curl -q --output log/curl1435.out  --include --trace-ascii log/trace1435 --trace-time --unix-socket /home/fk/git/curl/tests/log/server/http-uds http://server-interpreted.example.com/1435 --proxy http://127.0.0.1:9119/  > log/stdout1435 2> log/stderr1435
>    CMD (14336): /home/fk/git/curl/src/curl -q --output log/curl1435.out  --include --trace-ascii log/trace1435 --trace-time --unix-socket /home/fk/git/curl/tests/log/server/http-uds http://server-interpreted.example.com/1435 --proxy http://127.0.0.1:9119/  > log/stdout1435 2> log/stderr1435
>    Expecting crlf
>    Expecting no Connection: header
>    Expecting no Proxy-Connection: header
>    Skipping 'Proxy-Connection: Keep-Alive'
> 
>     1435: protocol FAILED:
>    Unprocessed headers:
>    --- log/check-expected 2026-05-15 11:23:43.825752000 +0200
>    +++ log/check-generated 2026-05-15 11:23:43.825570000 +0200
>    @@ -1,5 +1,5 @@
>    -GET /1435 HTTP/1.1[CR][LF]
>    -Host: server-interpreted.example.com[CR][LF]
>    +CONNECT /home/fk/git/curl/tests/log/server/http-uds:0 HTTP/1.1[CR][LF]
>    +Host: /home/fk/git/curl/tests/log/server/http-uds:0[CR][LF]
>     User-Agent: curl/8.21.0-DEV[CR][LF]
>    -Accept: */*[CR][LF]
>    +Proxy-Connection: Keep-Alive[CR][LF]
>     [CR][LF]
>    Processed headers:
>    Expecting crlf
>    Expecting no Connection: header
>    Expecting no Proxy-Connection: header
>    Skipping 'Proxy-Connection: Keep-Alive'
>    --- log/check-expected 2026-05-15 11:23:43.833750000 +0200
>    +++ log/check-generated 2026-05-15 11:23:43.833643000 +0200
>    @@ -1,5 +1,4 @@
>    -GET /1435 HTTP/1.1[CR][LF]
>    -Host: server-interpreted.example.com[CR][LF]
>    +CONNECT /home/fk/git/curl/tests/log/server/http-uds:0 HTTP/1.1[CR][LF]
>    +Host: /home/fk/git/curl/tests/log/server/http-uds:0[CR][LF]
>     User-Agent: curl/8.21.0-DEV[CR][LF]
>    -Accept: */*[CR][LF]
>     [CR][LF]
>    * kill pid for http-unix => 28
>    RUN: Process with pid 28 signalled to die
>    RUN: Process with pid 28 gracefully died
>    TESTDONE: 1 tests were considered during 1 seconds.
>    TESTDONE: 0 tests out of 1 reported OK: 0%
> 
>    FAIL 1435: 'simple HTTP GET over Unix socket' HTTP, HTTP GET, UnixSockets
> 
>    TESTFAIL: These test cases failed: 1435
> 
> As far as I can tell, Privoxy isn't actually being used and it
> does not support Unix domain sockets anyway.
> 
> I obviously don't actually expect the test to work when using Privoxy
> and only bring this up because the generated request looks invalid to
> me.
> 
> Is the combination of --unix-socket and --proxy http://... expected
> to work?

--unix-socket should disable proxy arguments.

Looks like a bug in master.

> 
> If not, it should probably be explicitly rejected.
> 
> Fabian
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