frp/pkg/plugin/server/http.go

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// Copyright 2019 fatedier, fatedier@gmail.com
//
// 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 plugin
import (
"bytes"
"context"
"crypto/tls"
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"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/url"
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"reflect"
"strings"
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)
type HTTPPluginOptions struct {
Name string
Addr string
Path string
Ops []string
TLSVerify bool
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}
type httpPlugin struct {
options HTTPPluginOptions
url string
client *http.Client
}
func NewHTTPPluginOptions(options HTTPPluginOptions) Plugin {
var url = fmt.Sprintf("%s%s", options.Addr, options.Path)
var client *http.Client
if strings.HasPrefix(url, "https://") {
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: options.TLSVerify == false},
}
client = &http.Client{Transport: tr}
} else {
client = &http.Client{}
}
if !strings.HasPrefix(url, "https://") && !strings.HasPrefix(url, "http://") {
url = "http://" + url
}
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return &httpPlugin{
options: options,
url: url,
client: client,
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}
}
func (p *httpPlugin) Name() string {
return p.options.Name
}
func (p *httpPlugin) IsSupport(op string) bool {
for _, v := range p.options.Ops {
if v == op {
return true
}
}
return false
}
func (p *httpPlugin) Handle(ctx context.Context, op string, content interface{}) (*Response, interface{}, error) {
r := &Request{
Version: APIVersion,
Op: op,
Content: content,
}
var res Response
res.Content = reflect.New(reflect.TypeOf(content)).Interface()
if err := p.do(ctx, r, &res); err != nil {
return nil, nil, err
}
return &res, res.Content, nil
}
func (p *httpPlugin) do(ctx context.Context, r *Request, res *Response) error {
buf, err := json.Marshal(r)
if err != nil {
return err
}
v := url.Values{}
v.Set("version", r.Version)
v.Set("op", r.Op)
req, err := http.NewRequest("POST", p.url+"?"+v.Encode(), bytes.NewReader(buf))
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if err != nil {
return err
}
req = req.WithContext(ctx)
req.Header.Set("X-Frp-Reqid", GetReqidFromContext(ctx))
req.Header.Set("Content-Type", "application/json")
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resp, err := p.client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("do http request error code: %d", resp.StatusCode)
}
buf, err = ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
if err = json.Unmarshal(buf, res); err != nil {
return err
}
return nil
}