mirror of
https://gitee.com/rainbond/Rainbond.git
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112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
// Copyright (C) 2014-2018 Goodrain Co., Ltd.
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// RAINBOND, Application Management Platform
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version. For any non-GPL usage of Rainbond,
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// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
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// must be obtained first.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package proxy
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import (
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"net"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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"strconv"
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"strings"
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"time"
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"github.com/sirupsen/logrus"
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)
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//HTTPProxy HTTPProxy
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type HTTPProxy struct {
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name string
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endpoints EndpointList
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lb LoadBalance
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client *http.Client
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}
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//Proxy http proxy
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func (h *HTTPProxy) Proxy(w http.ResponseWriter, r *http.Request) {
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endpoint := h.lb.Select(r, h.endpoints)
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endURL, err := url.Parse(endpoint.GetHTTPAddr())
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if err != nil {
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logrus.Errorf("parse endpoint url error,%s", err.Error())
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w.WriteHeader(502)
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return
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}
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if endURL.Scheme == "" {
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endURL.Scheme = "http"
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}
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proxy := httputil.NewSingleHostReverseProxy(endURL)
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proxy.ServeHTTP(w, r)
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}
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//UpdateEndpoints 更新端点
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func (h *HTTPProxy) UpdateEndpoints(endpoints ...string) {
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ends := []string{}
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for _, end := range endpoints {
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if kv := strings.Split(end, "=>"); len(kv) > 1 {
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ends = append(ends, kv[1])
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} else {
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ends = append(ends, end)
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}
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}
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h.endpoints = CreateEndpoints(ends)
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}
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//Do do proxy
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func (h *HTTPProxy) Do(r *http.Request) (*http.Response, error) {
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endpoint := h.lb.Select(r, h.endpoints)
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if strings.HasPrefix(endpoint.String(), "http") {
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r.URL.Host = strings.Replace(endpoint.String(), "http://", "", 1)
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} else {
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r.URL.Host = endpoint.String()
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}
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//default is http
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r.URL.Scheme = "http"
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return h.client.Do(r)
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}
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func createHTTPProxy(name string, endpoints []string, lb LoadBalance) *HTTPProxy {
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ends := []string{}
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for _, end := range endpoints {
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if kv := strings.Split(end, "=>"); len(kv) > 1 {
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ends = append(ends, kv[1])
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} else {
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ends = append(ends, end)
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}
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}
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if lb == nil {
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lb = NewRoundRobin()
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}
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timeout, _ := strconv.Atoi(os.Getenv("PROXY_TIMEOUT"))
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if timeout == 0 {
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timeout = 10
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}
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var netTransport = &http.Transport{
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Dial: (&net.Dialer{
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Timeout: 5 * time.Second,
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}).Dial,
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TLSHandshakeTimeout: 5 * time.Second,
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}
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client := &http.Client{
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Transport: netTransport,
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Timeout: time.Second * time.Duration(timeout),
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}
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return &HTTPProxy{name, CreateEndpoints(ends), lb, client}
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}
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