Nginx反代Ollama接口跨域、无法逐字输出问题

场景

本地部署deepseek模型，用的Ollama管理，内网穿透到公网，在通过nginx反代ollama接口。

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问题描述

1. 跨域问题

• nginx转发时请求头中需要加入origin，并且origin还要和ollama接口同源（协议、ip、端口一致）。

proxy_set_header origin http://ip:11434;

2. 无法逐字输出

• 关键配置：禁用缓冲和缓存

proxy_buffering off;
proxy_cache off;

• 确保流式传输的实时性

proxy_set_header Connection '';
proxy_http_version 1.1;
chunked_transfer_encoding off;

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完整配置

server {listen 80;server_name 域名;return 301 https://$server_name$request_uri;
}
server {listen 443 ssl;server_name 域名;#ssl证书配置ssl_certificate      /opt/nginx/conf/ssl/xxx/fullchain.pem;ssl_certificate_key  /opt/nginx/conf/ssl/xxx/key.pem;ssl_session_cache    shared:SSL:1m;ssl_session_timeout  5m;ssl_ciphers  HIGH:!aNULL:!MD5;ssl_prefer_server_ciphers  on;# 反代到 Ollama APIlocation /api/ {# Ollama 默认端口是 11434proxy_pass  http://服务器IP:11434;  # 请求时的origin请求头proxy_set_header origin http://服务器IP:11434;# 关闭 Nginx 的响应缓冲，强制数据实时传输到客户端proxy_buffering off;# 使用 HTTP/1.1 以支持长连接，避免 HTTP/1.0 的短连接问题proxy_cache off;# 确保流式传输的实时性proxy_set_header Connection '';proxy_http_version 1.1;# 关闭 Nginx 的分块编码处理（根据实际情况调整）chunked_transfer_encoding off;proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;proxy_set_header X-Forwarded-Proto $scheme;# 添加 CORS 头部add_header 'Access-Control-Allow-Origin' '*' always;add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;# 处理预检请求 (OPTIONS)if ($request_method = 'OPTIONS') {add_header 'Access-Control-Allow-Origin' '*';add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization';add_header 'Access-Control-Max-Age' 1728000;add_header 'Content-Type' 'text/plain; charset=utf-8';add_header 'Content-Length' 0;return 204;}}
}

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