29 lines
786 B
Go
29 lines
786 B
Go
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package proxy
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import (
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"fmt"
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"net/http"
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"net/http/httputil"
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"net/url"
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)
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// New 创建指向 WMS 后端的反向代理。
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// 请求侧保留 Method/Body/Header(含 Cookie、Authorization)；
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// 响应头默认全量透传（含滑动续签的 X-Renewed-Token，由 WMS 写入）。
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func New(upstream string) *httputil.ReverseProxy {
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target, err := url.Parse(upstream)
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if err != nil {
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panic(fmt.Sprintf("Upstream 配置非法: %v", err))
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}
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rp := httputil.NewSingleHostReverseProxy(target)
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origDirector := rp.Director
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rp.Director = func(req *http.Request) {
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origDirector(req)
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req.Host = target.Host
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}
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rp.ErrorHandler = func(w http.ResponseWriter, r *http.Request, err error) {
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http.Error(w, "WMS 服务不可达: "+err.Error(), http.StatusBadGateway)
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}
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return rp
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}
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