Breaking some internet traffic for fun
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commit
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*.iml
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The MIT License
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Copyright (c) 2019 Michal Szczepanski (michal@vane.pl)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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blocking-http-proxy
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====
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## Description
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Just blocking stuff that is in ```block.yaml```
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This code is ugly as hell and I know it but works with http/https traffic and is
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keeping me away from unwanted websites that save data on my computer.
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## Install
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```bash
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go build main.go
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./main
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```
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## Usage
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Point your computer http/https traffic to ```localhost``` port ```11666``` open browser and cry with blocked internet
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## Tips
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Wanna go to facebook - remove last line in block.yaml
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block:
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- '.*.driftt.com.*'
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- '.*.drift.com.*'
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- '.*.gemius.pl.*'
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- '.*.hotjar.com.*'
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- '.*.itunes.apple.com.*'
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- '.*.meetrics.net.*'
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- '.*.scorecardresearch.com.*'
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- '.*google-analytics.com.*'
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- '.*.mtalk.google.com.*'
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- '.*.quantserve.com.*'
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- '.*.exactag.com.*'
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- '.*.doubleclick.net.*'
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- '.*.adnxs.com.*'
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- '.*.adform.net.*'
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- '.*.googlesyndication.com.*'
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- '.*.criteo\..*'
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- '.*mtalk.google.com.*'
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- '.*.pushpushgo.com.*'
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- '.*.amazon-adsystem.com.*'
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- '.*adservice.google.*'
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- '.*smartadserver.com.*'
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- '.*.efigence.com.*'
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- '.*.adocean.pl.*'
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- '.*.etargetnet.com.*'
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- '.*.bbelements.com.*'
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- '.*.outbrain.com.*'
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- '.*.outbrainimg.com.*'
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- '.*.onetrust.com.*'
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- '.*.postrelease.com.*'
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- '.*.pubmatic.com.*'
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- '.*.casalemedia.com.*'
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- '.*.adomik.com.*'
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- '.*.ocdn.eu.*'
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- '.*googletagservices..*'
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- '.*ads.linkedin.com.*'
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- '.*.rubiconproject.com.*'
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- '.*.creativecdn.com.*'
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- '.*.snrbox.com.*'
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- '.*.erne.co.*'
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- '.*.ad.360yield.com.*'
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- '.*.gamoshi.io.*'
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- '.*.adscale.de.*'
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- '.*.adxcore.com.*'
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- '.*.bidswitch.net.*'
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- '.*.admanmedia.com.*'
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- '.*.openx.net.*'
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- '.*.everesttech.net.*'
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- '.*.demdex.net.*'
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- '.*.sectigo.com.*'
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- '.*.nsaudience.pl.*'
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- '.*.mmstat.com.*'
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- '.*analytics.twitter.*'
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- '.*.quiet.ly.*'
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- '.*.hs-analytics.net.*'
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- '.*.usemessages.com.*'
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- '.*.truste.com.*'
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- '.*.go-mpulse.net.*'
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- '.*.trustarc.com.*'
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- '.*.truste-svc.net.*'
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- '.*.akstat.io.*'
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- '.*.leadfeeder.com.*'
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- '.*.emsecure.net.*'
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- '.*.moatads.com.*'
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- '.*.powerlinks.com.*'
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- '.*.mfadsrvr.com.*'
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- '.*.adsrvr.org.*'
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- '.*.nr-data.net.*'
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- '.*.crwdcntrl.net.*'
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- '.*.agkn.com.*'
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- '.*.bluekai.com.*'
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- '.*.redintelligence.net.*'
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- '.*.advertising.com.*'
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- '.*.perfectmarket.com.*'
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- '.*.bkrtx.com.*'
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- '.*.edgekey.net.*'
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- '.*.chartbeat.net.*'
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- '.*.optimizely.com.*'
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- '.*.sharethrough.com.*'
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- '.*.qualtrics.com.*'
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- '.*.cedexis.com.*'
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- '.*.btrll.com.*'
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- '.*.quantcast.com.*'
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- '.*.atwola.com.*'
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- '.*iteratehq.com.*'
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- '.*.facebook.*'
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package main
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import (
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"crypto/tls"
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"gopkg.in/yaml.v2"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"net"
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"net/http"
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"regexp"
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"time"
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)
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/*Based on
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https://github.com/bechurch/reverse-proxy-demo
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https://github.com/txn2/p3y/blob/master/p3y.go
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https://medium.com/@mlowicki/http-s-proxy-in-golang-in-less-than-100-lines-of-code-6a51c2f2c38c
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*/
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type conf struct {
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Entries []string `yaml:"block"`
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}
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//https
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func handleTunneling(res http.ResponseWriter, req *http.Request) {
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dest_conn, err := net.DialTimeout("tcp", req.Host, 10*time.Second)
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if err != nil {
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http.Error(res, err.Error(), http.StatusServiceUnavailable)
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return
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}
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res.WriteHeader(http.StatusOK)
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hijacker, ok := res.(http.Hijacker)
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if !ok {
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http.Error(res, "Hijacking not supported", http.StatusInternalServerError)
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return
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}
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client_conn, _, err := hijacker.Hijack()
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if err != nil {
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http.Error(res, err.Error(), http.StatusServiceUnavailable)
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}
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go transfer(dest_conn, client_conn)
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go transfer(client_conn, dest_conn)
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}
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func transfer(destination io.WriteCloser, source io.ReadCloser) {
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defer destination.Close()
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defer source.Close()
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io.Copy(destination, source)
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}
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// http
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func copyHeader(dst, src http.Header) {
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for k, vv := range src {
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for _, v := range vv {
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dst.Add(k, v)
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}
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}
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}
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func handleRequestCustom(res http.ResponseWriter, req *http.Request) {
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transport := http.DefaultTransport
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out, err := transport.RoundTrip(req)
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if err != nil {
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http.Error(res, err.Error(), http.StatusServiceUnavailable)
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return
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}
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copyHeader(res.Header(), out.Header)
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res.WriteHeader(out.StatusCode)
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_, err = io.Copy(res, out.Body)
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if err != nil {
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http.Error(res, err.Error(), http.StatusInternalServerError)
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return
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}
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err = out.Body.Close()
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if err != nil {
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http.Error(res, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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func loadBlockedList(filename string) []regexp.Regexp {
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var c conf
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yamlFile, err := ioutil.ReadFile(filename)
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if err != nil {
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log.Printf("yamlFile.Get err #%v ", err)
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}
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err = yaml.Unmarshal(yamlFile, &c)
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regexps := []regexp.Regexp{}
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for _, condition := range c.Entries {
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//log.Printf("%s", condition)
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r := regexp.MustCompile(condition)
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regexps = append(regexps, *r)
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}
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return regexps
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}
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func shouldBlock(regList []regexp.Regexp, url string) bool {
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for _, condition := range regList {
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if condition.MatchString(url) {
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return true
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}
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}
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return false
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}
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func main() {
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port := "0.0.0.0:11666"
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log.Printf("Server will run on: %s\n", port)
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http.HandleFunc("/", handleRequestCustom)
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regList := loadBlockedList("block.yaml")
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server := &http.Server{
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Addr: port,
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Handler: http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
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if shouldBlock(regList, req.Host) {
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//log.Printf("Blocked %s\n", req.Host)
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if wr, ok := res.(http.Hijacker); ok {
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conn, _, err := wr.Hijack()
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if err != nil {
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fmt.Fprint(res, err)
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}
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conn.Close()
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}
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} else {
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if req.Method == http.MethodConnect {
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log.Printf("proxy_url: %s\n", req.Host)
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handleTunneling(res, req)
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} else {
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log.Printf("proxy_url: %s%s\n", req.Host, req.RequestURI)
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handleRequestCustom(res, req)
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}
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}
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}),
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// Disable HTTP/2.
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TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler)),
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}
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server.ListenAndServe()
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}
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