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https://github.com/roglew/puppy
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170 lines
3.8 KiB
170 lines
3.8 KiB
7 years ago
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package main
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import (
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"encoding/pem"
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"html/template"
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"net/http"
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"strings"
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)
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// Page template
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var MASTER_SRC string = `
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<html>
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<head>
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<title>{{block "title" .}}Puppy Proxy{{end}}</title>
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{{block "head" .}}{{end}}
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</head>
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<body>
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{{block "body" .}}{{end}}
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</body>
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</html>
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`
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var MASTER_TPL *template.Template
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// Page sources
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var HOME_SRC string = `
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{{define "title"}}Puppy Home{{end}}
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{{define "body"}}
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<p>Welcome to Puppy<p>
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<ul>
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<li><a href="/certs">Download CA certificate</a></li>
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</ul>
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{{end}}
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`
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var HOME_TPL *template.Template
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var CERTS_SRC string = `
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{{define "title"}}CA Certificate{{end}}
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{{define "body"}}
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<p>Downlad this CA cert and add it to your browser to intercept HTTPS messages<p>
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<p><a href="/certs/download">Download</p>
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{{end}}
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`
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var CERTS_TPL *template.Template
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var RSPVIEW_SRC string = `
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{{define "title"}}Response Viewer{{end}}
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{{define "head"}}
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<script>
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function ViewResponse() {
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rspid = document.getElementById("rspid").value
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window.location.href = "/rsp/" + rspid
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}
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</script>
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{{end}}
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{{define "body"}}
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<p>Enter a response ID below to view it in the browser<p>
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<input type="text" id="rspid"></input><input type="button" onclick="ViewResponse()" value="Go!"></input>
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{{end}}
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`
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var RSPVIEW_TPL *template.Template
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func init() {
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var err error
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MASTER_TPL, err = template.New("master").Parse(MASTER_SRC)
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if err != nil {
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panic(err)
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}
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HOME_TPL, err = template.Must(MASTER_TPL.Clone()).Parse(HOME_SRC)
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if err != nil {
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panic(err)
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}
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CERTS_TPL, err = template.Must(MASTER_TPL.Clone()).Parse(CERTS_SRC)
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if err != nil {
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panic(err)
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}
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RSPVIEW_TPL, err = template.Must(MASTER_TPL.Clone()).Parse(RSPVIEW_SRC)
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if err != nil {
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panic(err)
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}
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}
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func responseHeaders(w http.ResponseWriter) {
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w.Header().Set("Connection", "close")
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w.Header().Set("Cache-control", "no-cache")
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w.Header().Set("Pragma", "no-cache")
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w.Header().Set("Cache-control", "no-store")
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w.Header().Set("X-Frame-Options", "DENY")
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}
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func WebUIHandler(w http.ResponseWriter, r *http.Request, iproxy *InterceptingProxy) {
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responseHeaders(w)
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parts := strings.Split(r.URL.Path, "/")
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switch parts[1] {
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case "":
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WebUIRootHandler(w, r, iproxy)
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case "certs":
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WebUICertsHandler(w, r, iproxy, parts[2:])
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case "rsp":
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WebUIRspHandler(w, r, iproxy, parts[2:])
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}
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}
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func WebUIRootHandler(w http.ResponseWriter, r *http.Request, iproxy *InterceptingProxy) {
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err := HOME_TPL.Execute(w, nil)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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func WebUICertsHandler(w http.ResponseWriter, r *http.Request, iproxy *InterceptingProxy, path []string) {
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if len(path) > 0 && path[0] == "download" {
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cert := iproxy.GetCACertificate()
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if cert == nil {
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w.Write([]byte("no active certs to download"))
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return
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}
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pemData := pem.EncodeToMemory(
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&pem.Block{
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Type: "CERTIFICATE",
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Bytes: cert.Certificate[0],
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},
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)
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w.Header().Set("Content-Type", "application/octet-stream")
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w.Header().Set("Content-Disposition", "attachment; filename=\"cert.pem\"")
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w.Write(pemData)
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return
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}
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err := CERTS_TPL.Execute(w, nil)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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func viewResponseHeaders(w http.ResponseWriter) {
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w.Header().Del("Cookie")
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}
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func WebUIRspHandler(w http.ResponseWriter, r *http.Request, iproxy *InterceptingProxy, path []string) {
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if len(path) > 0 {
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reqid := path[0]
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ms := iproxy.GetProxyStorage()
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req, err := ms.LoadRequest(reqid)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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rsp := req.ServerResponse
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for k, v := range rsp.Header {
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for _, vv := range v {
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w.Header().Add(k, vv)
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}
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}
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viewResponseHeaders(w)
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w.WriteHeader(rsp.StatusCode)
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w.Write(rsp.BodyBytes())
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return
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}
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err := RSPVIEW_TPL.Execute(w, nil)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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