88 lines
2.0 KiB
Go
88 lines
2.0 KiB
Go
// Copyright 2023 The casbin Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package proxy
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import (
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"crypto/tls"
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"fmt"
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"net"
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"net/http"
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"strings"
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"time"
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"github.com/casbin/casibase/conf"
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"golang.org/x/net/proxy"
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)
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var (
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DefaultHttpClient *http.Client
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ProxyHttpClient *http.Client
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)
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func InitHttpClient() {
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// not use proxy
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DefaultHttpClient = http.DefaultClient
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// use proxy
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ProxyHttpClient = getProxyHttpClient()
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}
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func isAddressOpen(address string) bool {
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timeout := time.Millisecond * 100
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conn, err := net.DialTimeout("tcp", address, timeout)
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if err != nil {
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// cannot connect to address, proxy is not active
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return false
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}
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if conn != nil {
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defer conn.Close()
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fmt.Printf("Socks5 proxy enabled: %s\n", address)
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return true
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}
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return false
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}
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func getProxyHttpClient() *http.Client {
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socks5Proxy := conf.GetConfigString("socks5Proxy")
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if socks5Proxy == "" {
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return &http.Client{}
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}
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if !isAddressOpen(socks5Proxy) {
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return &http.Client{}
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}
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// https://stackoverflow.com/questions/33585587/creating-a-go-socks5-client
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dialer, err := proxy.SOCKS5("tcp", socks5Proxy, nil, proxy.Direct)
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if err != nil {
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panic(err)
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}
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tr := &http.Transport{Dial: dialer.Dial, TLSClientConfig: &tls.Config{InsecureSkipVerify: true}}
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return &http.Client{
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Transport: tr,
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}
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}
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func GetHttpClient(url string) *http.Client {
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if strings.Contains(url, "githubusercontent.com") || strings.Contains(url, "googleusercontent.com") {
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return ProxyHttpClient
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} else {
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return DefaultHttpClient
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}
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}
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