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Implement optional host proxy for cache
Implements both host_proxy and https_proxy (with mitm cert) Does not actually cache anything, just verbose INFO logging. Signed-off-by: Anders F Björklund <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| {{ range $line := .HTTPProxyCACert.Lines -}} | ||
| {{ $line }} | ||
| {{ end -}} |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| // This file has been adapted from https://github.com/elazarl/goproxy/blob/7cc037d/examples/goproxy-eavesdropper/main.go | ||
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| package proxy | ||
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| import ( | ||
| "bufio" | ||
| "context" | ||
| "net" | ||
| "net/http" | ||
| "regexp" | ||
| "strconv" | ||
| "time" | ||
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| "github.com/elazarl/goproxy" | ||
| "github.com/sirupsen/logrus" | ||
| ) | ||
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| // CACert has the CA certificate text | ||
| var CACert = string(goproxy.CA_CERT) | ||
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| type ServerOptions struct { | ||
| Address string | ||
| TCPPort int | ||
| } | ||
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| type Server struct { | ||
| srv *http.Server | ||
| } | ||
|
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| func (s *Server) Shutdown() { | ||
| ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) | ||
| defer cancel() | ||
| if s.srv != nil { | ||
| _ = s.srv.Shutdown(ctx) | ||
| } | ||
| } | ||
|
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| func Start(opts ServerOptions) (*Server, error) { | ||
| server := &Server{} | ||
| if opts.TCPPort > 0 { | ||
| srv, err := listenAndServe(opts) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| server.srv = srv | ||
| } | ||
| return server, nil | ||
| } | ||
|
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| func listenAndServe(opts ServerOptions) (*http.Server, error) { | ||
| addr := net.JoinHostPort(opts.Address, strconv.Itoa(opts.TCPPort)) | ||
| proxy := goproxy.NewProxyHttpServer() | ||
| proxy.OnRequest(goproxy.ReqHostMatches(regexp.MustCompile("^.*$"))). | ||
| HandleConnect(goproxy.AlwaysMitm) | ||
| proxy.OnRequest(goproxy.ReqHostMatches(regexp.MustCompile("^.*:80$"))). | ||
| HijackConnect(func(req *http.Request, client net.Conn, ctx *goproxy.ProxyCtx) { | ||
| defer func() { | ||
| if e := recover(); e != nil { | ||
| ctx.Logf("error connecting to remote: %v", e) | ||
| _, _ = client.Write([]byte("HTTP/1.1 500 Cannot reach destination\r\n\r\n")) | ||
| } | ||
| client.Close() | ||
| }() | ||
| url := req.URL.String() | ||
| ctx.Logf("URL: %s", url) | ||
| clientBuf := bufio.NewReadWriter(bufio.NewReader(client), bufio.NewWriter(client)) | ||
| remote, err := net.Dial("tcp", req.URL.Host) | ||
| if err != nil { | ||
| ctx.Logf("%v", err) | ||
| return | ||
| } | ||
| _, _ = client.Write([]byte("HTTP/1.1 200 Ok\r\n\r\n")) | ||
| remoteBuf := bufio.NewReadWriter(bufio.NewReader(remote), bufio.NewWriter(remote)) | ||
| for { | ||
| req, err := http.ReadRequest(clientBuf.Reader) | ||
| if err != nil { | ||
| ctx.Logf("%v", err) | ||
| return | ||
| } | ||
| _ = req.Write(remoteBuf) | ||
| _ = remoteBuf.Flush() | ||
| resp, err := http.ReadResponse(remoteBuf.Reader, req) | ||
| if err != nil { | ||
| ctx.Logf("%v", err) | ||
| return | ||
| } | ||
| _ = resp.Write(clientBuf.Writer) | ||
| _ = clientBuf.Flush() | ||
| resp.Body.Close() | ||
| } | ||
| }) | ||
| proxy.Verbose = true | ||
| s := &http.Server{Addr: addr, Handler: proxy} | ||
| go func() { | ||
| logrus.Debugf("Start HTTP proxy listening on: %v", addr) | ||
| if e := s.ListenAndServe(); e != nil { | ||
| panic(e) | ||
| } | ||
| }() | ||
|
|
||
| return s, nil | ||
| } |
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