XHTTP + Reality 在 mode=auto 时失败（unexpected response version 88），mode=stream-one 正常 #5635
Description
完整性要求
- 我读完了 issue 模板中的所有注释，确保填写符合要求。
- 我保证阅读了文档，了解所有我编写的配置文件项的含义，而不是大量堆砌看似有用的选项或默认值。
- 我提供了完整的配置文件和日志，而不是出于自己的判断只给出截取的部分。
- 我搜索了 issues, 没有发现已提出的类似问题。
- 问题在 Release 最新的版本上可以成功复现
描述
Xray-core 26.1.31（Windows 客户端）在 VLESS + Reality + XHTTP 的场景下，xhttpSettings.mode=auto 无法连接，报错 proxy/vless/encoding: unexpected response version. Expecting 0 but actually 88。
将 xhttpSettings.mode 显式改为 stream-one 后即恢复正常。
这是从旧版本升级到 26.1.31 后出现的问题（之前 auto 可用）。
排查到 Xray 在 XHTTP dial 时对 auto 的处理可能与 sessionId 生成逻辑不一致：auto 在 Reality 下应等价 stream-one，但仍生成 sessionId，导致 server 侧走了非 stream-one 的处理路径。
相关源码（供参考）：
- transport/internet/splithttp/dialer.go：sessionId 生成发生在 auto -> stream-one 的解析之前
- transport/internet/splithttp/hub.go：带 sessionId 的请求会走 stream-up / packet-up 分支
重现方式
- 服务端使用下方服务端配置启动 Xray-core（Linux）。
- 客户端使用下方客户端配置启动 Xray-core（Windows）。
- 访问任意 https 网站（例如 https://www.google.com）。
- 观察客户端日志，出现 unexpected response version. Expecting 0 but actually 88。
- 将客户端 xhttpSettings.mode 改为 stream-one，重启后连接恢复正常。
客户端配置
Details
{
"log": { "loglevel": "debug", "dnsLog": true },
"inbounds": [
{
"tag": "socks",
"port": 10808,
"listen": "127.0.0.1",
"protocol": "mixed",
"settings": { "auth": "noauth", "udp": true }
}
],
"outbounds": [
{
"tag": "proxy",
"protocol": "vless",
"settings": {
"vnext": [
{
"address": "SERVER_IP",
"port": 14183,
"users": [
{
"id": "UUID",
"encryption": "none"
}
]
}
]
},
"streamSettings": {
"network": "xhttp",
"security": "reality",
"xhttpSettings": {
"path": "/tcobxHTTP",
"host": "www.suny.edu",
"mode": "auto"
},
"realitySettings": {
"serverName": "www.suny.edu",
"fingerprint": "chrome",
"publicKey": "PUBLIC_KEY",
"shortId": "SHORT_ID",
"spiderX": ""
}
}
},
{ "tag": "direct", "protocol": "freedom" }
]
}
服务端配置
Details
{
"log": { "loglevel": "debug", "dnsLog": true },
"inbounds": [
{
"listen": "0.0.0.0",
"port": 14183,
"protocol": "vless",
"settings": {
"clients": [
{
"id": "UUID",
"email": "test@test",
"encryption": "none"
}
],
"decryption": "none"
},
"streamSettings": {
"network": "xhttp",
"security": "reality",
"xhttpSettings": {
"path": "/tcobxHTTP"
},
"realitySettings": {
"show": false,
"dest": "www.suny.edu:443",
"serverNames": ["www.suny.edu"],
"privateKey": "PRIVATE_KEY",
"shortIds": ["SHORT_ID"]
}
}
}
],
"outbounds": [
{ "protocol": "freedom", "tag": "direct" }
]
}
客户端日志
Details
Xray 26.1.31 (windows/amd64)
...
[Info] transport/internet/splithttp: XHTTP is dialing to tcp:SERVER_IP:14183, mode auto, HTTP version 2, host www.suny.edu
[Info] proxy/vless/outbound: tunneling request to tcp:www.google.com:443 via SERVER_IP:14183
[Info] app/proxyman/outbound: failed to process outbound traffic > proxy/vless/outbound: connection ends > proxy/vless/outbound: failed to decode response header > proxy/vless/encoding: unexpected
response version. Expecting 0 but actually 88
服务端日志
Details
无