67 lines
1.2 KiB
Go
67 lines
1.2 KiB
Go
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package gateway
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import (
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"net/http"
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"net/http/httputil"
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"net/url"
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"path"
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"strings"
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)
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const (
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RoutePrefix string = "/api/gateway"
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AllowedPrefix string = "/v1/workspaces/me"
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)
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type proxy struct {
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url *url.URL
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stripPath string
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}
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func NewProxy(u string, stripPath string) (*httputil.ReverseProxy, error) {
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url, err := url.Parse(u)
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if err != nil {
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return nil, err
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}
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proxy := &proxy{url: url, stripPath: stripPath}
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return &httputil.ReverseProxy{
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Rewrite: proxy.rewrite,
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ModifyResponse: proxy.modifyResponse,
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ErrorHandler: proxy.errorHandler,
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}, nil
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}
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func (p *proxy) rewrite(pr *httputil.ProxyRequest) {
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pr.SetURL(p.url)
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pr.SetXForwarded()
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pr.Out.URL.Path = cleanPath(strings.ReplaceAll(pr.Out.URL.Path, p.stripPath, ""))
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}
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func (p *proxy) modifyResponse(res *http.Response) error {
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return nil
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}
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func (p *proxy) errorHandler(rw http.ResponseWriter, req *http.Request, err error) {
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rw.WriteHeader(http.StatusBadGateway)
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}
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func cleanPath(p string) string {
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if p == "" {
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return "/"
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}
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if p[0] != '/' {
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p = "/" + p
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}
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np := path.Clean(p)
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if p[len(p)-1] == '/' && np != "/" {
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if len(p) == len(np)+1 && strings.HasPrefix(p, np) {
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np = p
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} else {
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np += "/"
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}
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}
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return np
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}
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