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WIP: Only allow some specific headers #15

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26 changes: 21 additions & 5 deletions proxy/handlers.go
Original file line number Diff line number Diff line change
Expand Up @@ -12,9 +12,6 @@ import (
)

type APIReverseProxy struct {
upstreamURL *url.URL
host string

reverseProxy *httputil.ReverseProxy
}

Expand All @@ -27,6 +24,27 @@ func NewAPIReverseProxy(upstream string, host string) (*APIReverseProxy, error)
reverseProxy := &httputil.ReverseProxy{
Director: func(req *http.Request) {
rewriteRequestURL(req, upstreamURL)
headers := http.Header{}
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fmt.Println(req.Header)

allowedHeaders := []string{
"X-Forwarded-For",
"X-Forwarded-Host",
"X-Forwarded-Proto",
"User-Agent",
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"Accept", " Accept-Encoding", "Accept-Language",
}
for _, header := range allowedHeaders {
vals, ok := req.Header[header]
if !ok {
continue
}

for _, val := range vals {
headers.Add(header, val)
}
}
req.Header = headers
req.Host = host
},
ModifyResponse: func(resp *http.Response) error {
Expand All @@ -38,8 +56,6 @@ func NewAPIReverseProxy(upstream string, host string) (*APIReverseProxy, error)
}

return &APIReverseProxy{
upstreamURL: upstreamURL,
host: host,
reverseProxy: reverseProxy,
}, nil
}
Expand Down