forked from f13end/cryptotrader
/
apiproxy.go
76 lines (69 loc) · 2.43 KB
/
apiproxy.go
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// The MIT License (MIT)
//
// Copyright (c) 2018 Cranky Kernel
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies
// of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package binance
import (
"net/http"
"strings"
"io"
"log"
)
// BinanceApiProxy is a standard web handler function that will proxy requests
// to the Binance API.
func BinanceApiProxy(w http.ResponseWriter, r *http.Request) {
target := "https://api.binance.com"
request, err := http.NewRequest(r.Method, target, nil)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
log.Printf("error: failed to create request: %v\n", err)
return
}
request.URL.Path = r.URL.Path
request.URL.RawQuery = r.URL.RawQuery
for key, val := range r.Header {
switch strings.ToLower(key) {
case "x-mbx-apikey":
request.Header[key] = val
default:
}
}
response, err := http.DefaultClient.Do(request)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
log.Printf("error: failed to send request: %v\n", err)
return
}
for key, val := range response.Header {
w.Header()[key] = val
}
w.WriteHeader(response.StatusCode)
io.Copy(w, response.Body)
}
// NewBinanceApiProxyHandler return the Binance API proxy as a http.Handler.
//
// Useful if you need to strip the prefix, for example:
// router.PathPrefix("/proxy/binance").Handler(
// http.StripPrefix("/proxy/binance", NewBinanceApiProxyHandler()))
func NewBinanceApiProxyHandler() http.Handler {
return http.HandlerFunc(BinanceApiProxy)
}