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124 lines
2.5 KiB
Go

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package main
import (
"fmt"
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"github.com/jordanorelli/moon/lib"
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"io"
"net/http"
"net/http/httputil"
"os"
"strings"
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"time"
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"unicode"
)
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var (
client = new(http.Client)
)
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var config struct {
ProxyAddr string `
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name: proxy_addr
default: ":8080"
help: proxy address. Browsers send their http traffic to this port.
`
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AppAddr string `
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name: app_addr
default: ":9000"
help: app address. Users visit this address to view the proxy's history db
`
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DbPath string `
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name: dbpath
default: history.db
help: path to a sqlite file used for storing the user's history
`
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Timeout time.Duration `
name: timeout
default: 30s
help: useless timeout value for testing durations
`
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}
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func httpHandler(w http.ResponseWriter, r *http.Request) {
id := newRequestId()
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fmt.Printf("%s >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n", id.String())
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fmt.Println("from:", r.RemoteAddr)
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if err := freezeRequest(r); err != nil {
fmt.Printf("error freezing request: %s\n", err)
return
}
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b, err := httputil.DumpRequest(r, true)
if err != nil {
fmt.Printf("error dumping request: %s\n", err)
return
}
os.Stdout.Write(b)
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requestURI := r.RequestURI
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r.RequestURI = ""
r.URL.Scheme = strings.Map(unicode.ToLower, r.URL.Scheme)
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start := time.Now()
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res, err := client.Do(r)
if err != nil {
fmt.Printf("error forwarding request: %s\n", err)
return
}
defer res.Body.Close()
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fmt.Printf("%s <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n", id.String())
resb, err := httputil.DumpResponse(res, false)
if err != nil {
fmt.Printf("fuuuuuuuuuck")
}
os.Stdout.Write(resb)
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for k, v := range res.Header {
w.Header()[k] = v
}
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if _, ok := w.Header()["Proxy-Connection"]; ok {
delete(w.Header(), "Proxy-Connection")
}
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w.WriteHeader(res.StatusCode)
if _, err := io.Copy(w, res.Body); err != nil {
fmt.Printf("error copying body: %s\n", err)
}
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elapsed := time.Since(start)
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r.RequestURI = requestURI
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fmt.Printf("elapsed: %v (%v)\n", elapsed, elapsed.Nanoseconds()/1000000)
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saveRequest(id, r)
saveResponse(id, res, elapsed)
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}
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func bail(status int, t string, args ...interface{}) {
if status == 0 {
fmt.Fprintf(os.Stdout, t+"\n", args...)
} else {
fmt.Fprintf(os.Stderr, t+"\n", args...)
}
os.Exit(status)
}
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func proxyListener() {
m := http.NewServeMux()
m.HandleFunc("/", httpHandler)
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http.ListenAndServe(config.ProxyAddr, m)
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}
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func main() {
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moon.Parse(&config)
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if err := openDB(); err != nil {
bail(1, "unable to open db: %s", err)
}
defer db.Close()
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go appServer()
proxyListener()
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}