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Model does not support text/event-stream, Codex

Quick fix

Upgrade to cc-switch v3.16.4 and override the Accept request header in Codex advanced settings with a value accepted by the upstream.

Symptom

Section titled “Symptom”
Error output
LLM 本地部署模型：不支持请求头带有'Accept: text/event-stream' 
使用curl访问157721的代理，请求头不带上，就可以正常上游响应，带上，就会报上游406错误。
English translation

Locally deployed LLM model: does not support requests with the 'Accept: text/event-stream' header. When using curl to access the 157721 proxy, the upstream responds normally if this header is omitted; including it results in an upstream 406 error.

Cause

Section titled “Cause”

This locally deployed model does not accept the `Accept: text/event-stream` request header. Sending it through the proxy causes the upstream to return 406; omitting it allows a normal response.

The maintainer noted that cc-switch v3.16.4 adds local proxy request overrides. In the Codex provider form's advanced settings, you can customize request headers forwarded upstream. `Accept` is not on the protected-header allowlist and can be overridden. If streaming still fails after the override, the original post recommends providing a curl reproduction and the upstream response for further investigation.

Fix

Section titled “Fix”

  1. Upgrade cc-switch from v3.16.2 to v3.16.4.

  2. In the Codex provider form's advanced settings, use “local proxy request override (custom request headers/request body)” to override the `Accept` request header forwarded upstream.

  3. Change `Accept: text/event-stream` to a value accepted by the local model, such as `application/json` or `*/*`, then verify the upstream response.

Affected Versions

Section titled “Affected Versions”
ToolCodex
Version受影响：cc-switch v3.16.2；修复功能：v3.16.4
PlatformsUnknown

Source Issues

Section titled “Source Issues”

This page is distilled from 1 real issues

FAQ

Section titled “FAQ”
How should this be handled?
After upgrading to v3.16.4, override the `Accept` request header in Codex provider advanced settings with a value accepted by the local model. If streaming still fails, provide a curl reproduction and the upstream response for further investigation.
Section titled “Related problems”
stream disconnected before completionUpdate CC Switch to 4.0 or the latest version and retry; the maintainer recommended this, but the original issue did not confirm a resolution.1 issues mergedProxy not working, constant reconnect after entering a question; CodexThe separate proxy feature in cc-switch was removed; set the proxy via $env:http_proxy in PowerShell, then run Codex.1 issues mergedToggling proxy or switching third-party accounts invalidates official Codex sign-inNo verifiable solution was provided; the issue was suggested for further reporting to cc-switch-cli.1 issues merged

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