main.c


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/* 
 * main.c
 *
 * Copyright (C) 2012 James Booth <boothj5@gmail.com>
 * 
 * This file is part of Profanity.
 *
 * Profanity is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Profanity is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Profanity.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <stdio.h>
#include <string.h>

#include "profanity.h"

int main(int argc, char **argv)
{   
    int disable_tls = 0;

    // more than one argument
    if (argc > 2) {
        printf("Usage: profanity [-notls]\n");
        return 1;

    // argument is not -notls
    } else if (argc == 2) {
        char *arg1 = argv[1];
        if (strcmp(arg1, "-notls") != 0) {
            printf("Usage: profanity [-notls]\n");
            return 1;
        } else {
            disable_tls = 1;
        }
    }

    profanity_init(disable_tls);
    profanity_run();

    return 0;
}
package main

import (
	"context"
	"log"
	"net"
	"net/http"
	"strings"
)

// Attaches a request's IP address to the request's context.
// If getwtxt is behind a reverse proxy, get the last entry
// in the X-Forwarded-For or X-Real-IP HTTP header as the user IP.
func newCtxUserIP(ctx context.Context, r *http.Request) context.Context {

	base := strings.Split(r.RemoteAddr, ":")
	uip := base[0]

	if _, ok := r.Header["X-Forwarded-For"]; ok {
		proxied := r.Header["X-Forwarded-For"]
		base = strings.Split(proxied[len(proxied)-1], ":")
		uip = base[0]
	}

	xRealIP := http.CanonicalHeaderKey("X-Real-IP")
	if _, ok := r.Header[xRealIP]; ok {
		proxied := r.Header[xRealIP]
		base = strings.Split(proxied[len(proxied)-1], ":")
		uip = base[0]
	}

	return context.WithValue(ctx, ctxKey, uip)
}

// Retrieves a request's IP address from the request's context
func getIPFromCtx(ctx context.Context) net.IP {

	uip, ok := ctx.Value(ctxKey).(string)
	if !ok {
		log.Printf("Couldn't retrieve IP from request\n")
	}

	return net.ParseIP(uip)
}

// Shim function to modify/pass context value to a handler
func ipMiddleware(hop http.Handler) http.Handler {

	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		ctx := newCtxUserIP(r.Context(), r)
		hop.ServeHTTP(w, r.WithContext(ctx))
	})
}

// log output for 200s
func log200(r *http.Request) {

	uip := getIPFromCtx(r.Context())
	log.Printf("*** %v :: 200 :: %v %v\n", uip, r.Method, r.URL)
}

// log output for 400s
func log400(w http.ResponseWriter, r *http.Request, err string) {
	uip := getIPFromCtx(r.Context())
	log.Printf("*** %v :: 400 :: %v %v :: %v\n", uip, r.Method, r.URL, err)
	http.Error(w, "400 Bad Request: "+err, http.StatusBadRequest)
}

// log output for 404s
func log404(w http.ResponseWriter, r *http.Request, err error) {

	uip := getIPFromCtx(r.Context())
	log.Printf("*** %v :: 404 :: %v %v :: %v\n", uip, r.Method, r.URL, err)
	http.Error(w, err.Error(), http.StatusNotFound)
}

// log output for 500s
func log500(w http.ResponseWriter, r *http.Request, err error) {

	uip := getIPFromCtx(r.Context())
	log.Printf("*** %v :: 500 :: %v %v :: %v\n", uip, r.Method, r.URL, err)
	http.Error(w, err.Error(), http.StatusInternalServerError)
}