Spring WebSocket：由於無效而導致握手失敗升級標頭：null

Question

我使用wss（安全網絡套接字）和後端的spring以及javascript客戶端的STOMP。

有誰知道爲什麼得到：

Handshake failed due to invalid Upgrade header: null 

Answer 1

最後，我找到了解決辦法。

我不得不在tomcat中打開一個https端口來處理wss請求。

Answer 2

我遇到了與nginx https代理到tomcat相同的問題。這是因爲我不支持wss請求。爲了支持WSS的要求，我用的配置如下圖所示：

# 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"; 
    } 
}