Spring WebSocket: Handshake failed due to invalid Upgrade header: null

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如何解决Spring WebSocket: Handshake failed due to invalid Upgrade header: null？

我用tomcat的Nginx https代理遇到了同样的问题。这是因为我不支持wss请求。为了支持wss请求，我使用如下配置：

# WebSocketSecure SSL Endpoint
#
# The proxy is also an SSL endpoint for WSS and httpS connections.
# So the clIEnts can use wss:// connections 
# (e.g. from pages served via httpS) which work better with broken 
# proxy servers, etc.

server {
    Listen 443;

    # host name to respond to
    server_name ws.example.com;

    # your SSL configuration
    ssl on;
    ssl_certificate /etc/ssl/localcerts/ws.example.com.bundle.crt;
    ssl_certificate_key /etc/ssl/localcerts/ws.example.com.key;

    LOCATIOn / {
        # switch off logging
        access_log off;

        # redirect all http traffic to localhost:8080
        proxy_pass http://localhost:8080;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-ForWARDed-For $proxy_add_x_forWARDed_for;

        # WebSocket support (Nginx 1.4)
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

解决方法

Handshake failed due to invalid Upgrade header: null

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