[SFM] clash_api.external_ui server malfunction

[aur3l14no]

Operating system

macOS

System version

15.1.1 (24B91)

Installation type

sing-box for macOS Graphical Client

If you are using a graphical client, please provide the version of the client.

1.10.3 (reproducible on 1.11 TestFlight as well)

Version

No response

Description

curl-ing external ui gives me the following error, it seems that server closes the connection after transferring 512 bytes?

❯ curl http://127.0.0.1:9090/ui/ -vvv
16:33:00.077847 [0-x] == Info: [READ] client_reset, clear readers
16:33:00.078143 [0-0] == Info: [SETUP] added
16:33:00.078183 [0-0] == Info:   Trying 127.0.0.1:9090...
16:33:00.078385 [0-0] == Info: Connected to 127.0.0.1 (127.0.0.1) port 9090
16:33:00.078428 [0-0] == Info: using HTTP/1.x
16:33:00.078520 [0-0] => Send header, 81 bytes (0x51)
0000: GET /ui/ HTTP/1.1
0013: Host: 127.0.0.1:9090
0029: User-Agent: curl/8.11.0
0042: Accept: */*
004f:
16:33:00.078809 [0-0] == Info: Request completely sent off
16:33:00.081499 [0-0] <= Recv header, 17 bytes (0x11)
0000: HTTP/1.1 200 OK
16:33:00.081559 [0-0] == Info: [WRITE] cw_out, wrote 17 header bytes -> 17
16:33:00.081606 [0-0] == Info: [WRITE] download_write header(type=c, blen=17) -> 0
16:33:00.081654 [0-0] == Info: [WRITE] client_write(type=c, len=17) -> 0
16:33:00.081707 [0-0] <= Recv header, 22 bytes (0x16)
0000: Accept-Ranges: bytes
16:33:00.081755 [0-0] == Info: [WRITE] header_collect pushed(type=1, len=22) -> 0
16:33:00.081804 [0-0] == Info: [WRITE] cw_out, wrote 22 header bytes -> 22
16:33:00.081857 [0-0] == Info: [WRITE] download_write header(type=4, blen=22) -> 0
16:33:00.081910 [0-0] == Info: [WRITE] client_write(type=4, len=22) -> 0
16:33:00.081952 [0-0] <= Recv header, 21 bytes (0x15)
0000: Content-Length: 859
16:33:00.082006 [0-0] == Info: [WRITE] header_collect pushed(type=1, len=21) -> 0
16:33:00.082052 [0-0] == Info: [WRITE] cw_out, wrote 21 header bytes -> 21
16:33:00.082093 [0-0] == Info: [WRITE] download_write header(type=4, blen=21) -> 0
16:33:00.082141 [0-0] == Info: [WRITE] client_write(type=4, len=21) -> 0
16:33:00.082183 [0-0] <= Recv header, 40 bytes (0x28)
0000: Content-Type: text/html; charset=utf-8
16:33:00.082237 [0-0] == Info: [WRITE] header_collect pushed(type=1, len=40) -> 0
16:33:00.082281 [0-0] == Info: [WRITE] cw_out, wrote 40 header bytes -> 40
16:33:00.082321 [0-0] == Info: [WRITE] download_write header(type=4, blen=40) -> 0
16:33:00.082365 [0-0] == Info: [WRITE] client_write(type=4, len=40) -> 0
16:33:00.082404 [0-0] <= Recv header, 46 bytes (0x2e)
0000: Last-Modified: Fri, 06 Dec 2024 08:28:19 GMT
16:33:00.082463 [0-0] == Info: [WRITE] header_collect pushed(type=1, len=46) -> 0
16:33:00.082508 [0-0] == Info: [WRITE] cw_out, wrote 46 header bytes -> 46
16:33:00.082547 [0-0] == Info: [WRITE] download_write header(type=4, blen=46) -> 0
16:33:00.082593 [0-0] == Info: [WRITE] client_write(type=4, len=46) -> 0
16:33:00.082632 [0-0] <= Recv header, 14 bytes (0xe)
0000: Vary: Origin
16:33:00.082671 [0-0] == Info: [WRITE] header_collect pushed(type=1, len=14) -> 0
16:33:00.082714 [0-0] == Info: [WRITE] cw_out, wrote 14 header bytes -> 14
16:33:00.082755 [0-0] == Info: [WRITE] download_write header(type=4, blen=14) -> 0
16:33:00.082798 [0-0] == Info: [WRITE] client_write(type=4, len=14) -> 0
16:33:00.082838 [0-0] <= Recv header, 37 bytes (0x25)
0000: Date: Fri, 06 Dec 2024 08:33:00 GMT
16:33:00.082889 [0-0] == Info: [WRITE] header_collect pushed(type=1, len=37) -> 0
16:33:00.082933 [0-0] == Info: [WRITE] cw_out, wrote 37 header bytes -> 37
16:33:00.082972 [0-0] == Info: [WRITE] download_write header(type=4, blen=37) -> 0
16:33:00.083015 [0-0] == Info: [WRITE] client_write(type=4, len=37) -> 0
16:33:00.083057 [0-0] <= Recv header, 2 bytes (0x2)
0000:
16:33:00.083089 [0-0] == Info: [WRITE] header_collect pushed(type=1, len=2) -> 0
16:33:00.083152 [0-0] == Info: [WRITE] cw_out, wrote 2 header bytes -> 2
16:33:00.083208 [0-0] == Info: [WRITE] download_write header(type=4, blen=2) -> 0
16:33:00.083253 [0-0] == Info: [WRITE] client_write(type=4, len=2) -> 0
16:33:00.083294 [0-0] <= Recv data, 512 bytes (0x200)
0000: <!doctype html>.<html lang="en">.  <head>.    <meta charset="utf
0040: -8" />.    <meta.      name="viewport".      content="width=devi
0080: ce-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.
00c0: 0, user-scalable=no, viewport-fit=cover".    />.    <meta name="
0100: theme-color" content="#000000" />.    <link rel="icon" type="ima
0140: ge/svg+xml" href="./favicon.svg" />.    <link rel="apple-touch-i
0180: con" href="./pwa-192x192.png" />.    <script type="module" cross
01c0: origin src="./assets/index-DNc1N1Rv.js"></script>.    <link rel=
<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta
      name="viewport"
      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover"
    />
    <meta name="theme-color" content="#000000" />
    <link rel="icon" type="image/svg+xml" href="./favicon.svg" />
    <link rel="apple-touch-icon" href="./pwa-192x192.png" />
    <script type="module" crossorigin src="./assets/index-DNc1N1Rv.js"></script>
16:33:00.083742 [0-0] == Info: [WRITE] cw_out, wrote 512 body bytes -> 512
16:33:00.083784 [0-0] == Info: [WRITE] download_write body(type=1, blen=512) -> 0
16:33:00.083824 [0-0] == Info: [WRITE] client_write(type=1, len=512) -> 0
16:33:00.083873 [0-0] == Info: [WRITE] xfer_write_resp(len=711, eos=0) -> 0
16:33:00.083929 [0-0] <= Recv data, 0 bytes (0x0)
16:33:00.083966 [0-0] == Info: end of response with 347 bytes missing
16:33:00.084015 [0-0] == Info: [WRITE] client_write(type=81, len=0) -> 18
16:33:00.084089 [0-0] == Info: [WRITE] xfer_write_resp(len=0, eos=1) -> 18
16:33:00.084142 [0-0] == Info: [WRITE] cw-out done
16:33:00.084181 [0-0] == Info: closing connection #0
16:33:00.084218 [0-0] == Info: [SETUP] close
16:33:00.084261 [0-0] == Info: [SETUP] destroy
curl: (18) end of response with 347 bytes missing
    <link rel=⏎

Additionally, it seems this issue does not occur with sing-box core.

Reproduction

Reproducible with this minimal client config (of course you need to be able to download the dashboard):

{
  "log": {
    "level": "debug",
    "timestamp": true
  },
  "experimental": {
    "clash_api": {
      "default_mode": "Enhanced",
      "external_controller": "127.0.0.1:9090",
      "external_ui": "ui",
      "external_ui_download_url": "https://github.com/MetaCubeX/metacubexd/archive/gh-pages.zip"
    }
  }
}

Logs

No response

Supporter

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Integrity requirements

• I confirm that I have read the documentation, understand the meaning of all the configuration items I wrote, and did not pile up seemingly useful options or default values.
• I confirm that I have provided the server and client configuration files and process that can be reproduced locally, instead of a complicated client configuration file that has been stripped of sensitive data.
• I confirm that I have provided the simplest configuration that can be used to reproduce the error I reported, instead of depending on remote servers, TUN, graphical interface clients, or other closed-source software.
• I confirm that I have provided the complete configuration files and logs, rather than just providing parts I think are useful out of confidence in my own intelligence.

[aur3l14no]

Could be golang/go#70000
If so, updating go to ^1.23.3 will solve this issue.