/
proxy.go
66 lines (61 loc) · 1.93 KB
/
proxy.go
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// Copyright (c) 2021 Terminus, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metric
import (
"fmt"
"net/http"
"net/http/httputil"
"net/url"
api "github.com/erda-project/erda/pkg/common/httpapi"
)
func (p *provider) proxy(hostpath string, header http.Header, params url.Values, rw http.ResponseWriter, r *http.Request) error {
target, err := url.Parse(hostpath)
if err != nil {
return err
}
path, rawpath := target.Path, target.EscapedPath()
rp := &httputil.ReverseProxy{Director: func(req *http.Request) {
for k, vals := range header {
req.Header.Del(k)
for _, val := range vals {
req.Header.Add(k, val)
}
}
query := req.URL.Query()
for k, vals := range params {
query.Del(k)
for _, val := range vals {
query.Add(k, val)
}
}
req.URL.Scheme = target.Scheme
req.URL.Host = target.Host
req.URL.Path, req.URL.RawPath = path, rawpath
req.URL.RawQuery = query.Encode()
p.Log.Debugf("proxy %s %s -> %s", req.Method, rawpath, req.URL)
if _, ok := req.Header["User-Agent"]; !ok {
// explicitly disable User-Agent so it's not set to default value
req.Header.Set("User-Agent", "")
}
}}
rp.ServeHTTP(rw, r)
return nil
}
func (p *provider) proxyMonitor(path string, params url.Values, rw http.ResponseWriter, r *http.Request) interface{} {
err := p.proxy(fmt.Sprintf("%s%s", p.Cfg.MonitorURL, path), nil, params, rw, r)
if err != nil {
return api.Errors.Internal(err)
}
return nil
}