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/* -*- c -*-
 *
 * Copyright (c) 2002 Guillaume Cottenceau (gc at mandrakesoft dot com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2, as
 * published by the Free Software Foundation.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 ******************************************************************************/

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <curl/curl.h>
#include <curl/easy.h>

#include <libintl.h>
#undef _
#define _(arg) dgettext("grpmi", arg)

char * my_asprintf(char *msg, ...)
{
	char * out;
	va_list args;
	va_start(args, msg);
	if (vasprintf(&out, msg, args) == -1)
		out = "";
	va_end(args);
	return out;
}


SV * downloadprogress_callback_sv = NULL;

int my_progress_func(void *ptr, double td, double dd, double tu, double du)
{
	dSP;
	if (!downloadprogress_callback_sv)
		return 0;
	ENTER;
	SAVETMPS;
	PUSHMARK(SP);
  	XPUSHs(sv_2mortal(newSVnv(td)));
  	XPUSHs(sv_2mortal(newSVnv(dd)));
  	PUTBACK;
  	perl_call_sv(downloadprogress_callback_sv, G_DISCARD);
	FREETMPS;
	LEAVE;
	return 0;
}

char * download_url_real(char * url, char * location, char * proxy, char * proxy_user)
{
	CURL *curl;
	CURLcode rescurl = CURL_LAST;

	if ((curl = curl_easy_init())) {
		char * outfilename;
		struct stat statbuf;
		char * filename = basename(url);
		FILE * outfile;

		if (stat(location, &statbuf) || !S_ISDIR(statbuf.st_mode))
			return _("Download directory does not exist");

		if (asprintf(&outfilename, "%s/%s", location, filename) == -1)
			return _("Out of memory\n");

		if (!stat(outfilename, &statbuf) && S_ISREG(statbuf.st_mode)) {
			curl_easy_setopt(curl, CURLOPT_RESUME_FROM, statbuf.st_size);
		} else {
			unlink(outfilename);
			curl_easy_setopt(curl, CURLOPT_RESUME_FROM, 0);
		}
	
		outfile = fopen(outfilename, "a");
		free(outfilename);

		if (!outfile)
			return _("Could not open output file in append mode");

		curl_easy_setopt(curl, CURLOPT_URL, url);
		curl_easy_setopt(curl, CURLOPT_FILE, outfile);
		curl_easy_setopt(curl, CURLOPT_NOPROGRESS, FALSE);
		curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, my_progress_func);

                /* needed for "insecure" SSL accesses (don't verify the peer's certificate) */
                curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, FALSE);
                /* allow Location: to be followed (needed for MandrakeClub) */
                curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, TRUE);
                /* when following Location:, allow to still send user+password when hostname changed (needed for Club) */
                curl_easy_setopt(curl, CURLOPT_NO_HOSTNAME_CHECK_BEFORE_AUTHENTICATION, TRUE);

		if (proxy && strcmp(proxy, ""))
			curl_easy_setopt(curl, CURLOPT_PROXY, proxy);
		if (proxy_user && strcmp(proxy_user, ""))
			curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, proxy_user);

		rescurl = curl_easy_perform(curl);

		if (rescurl == CURLE_ALREADY_COMPLETE)
			rescurl = CURLE_OK;
	
		fclose(outfile);
		curl_easy_cleanup(curl);
	}
	
	if (rescurl != CURLE_OK) {
		switch (rescurl) {
		case CURLE_UNSUPPORTED_PROTOCOL:
			return _("Unsupported protocol\n");
			break;
		case CURLE_FAILED_INIT:
			return _("Failed init\n");
			break;
		case CURLE_URL_MALFORMAT:
			return _("Bad URL format\n");
			break;
		case CURLE_URL_MALFORMAT_USER:
			return _("Bad user format in URL\n");
			break;
		case CURLE_COULDNT_RESOLVE_PROXY:
			return _("Couldn't resolve proxy\n");
			break;
		case CURLE_COULDNT_RESOLVE_HOST:
			return _("Couldn't resolve host\n");
			break;
		case CURLE_COULDNT_CONNECT:
			return _("Couldn't connect\n");
			break;
		case CURLE_FTP_WEIRD_SERVER_REPLY:
			return _("FTP unexpected server reply\n");
			break;
		case CURLE_FTP_ACCESS_DENIED:
			return _("FTP access denied\n");
			break;
		case CURLE_FTP_USER_PASSWORD_INCORRECT:
			return _("FTP user password incorrect\n");
			break;
		case CURLE_FTP_WEIRD_PASS_REPLY:
			return _("FTP unexpected PASS reply\n");
			break;
		case CURLE_FTP_WEIRD_USER_REPLY:
			return _("FTP unexpected USER reply\n");
			break;
		case CURLE_FTP_WEIRD_PASV_REPLY:
			return _("FTP unexpected PASV reply\n");
			break;
		case CURLE_FTP_WEIRD_227_FORMAT:
			return _("FTP unexpected 227 format\n");
			break;
		case CURLE_FTP_CANT_GET_HOST:
			return _("FTP can't get host\n");
			break;
		case CURLE_FTP_CANT_RECONNECT:
			return _("FTP can't reconnect\n");
			break;
		case CURLE_FTP_COULDNT_SET_BINARY:
			return _("FTP couldn't set binary\n");
			break;
		case CURLE_PARTIAL_FILE:
			return _("Partial file\n");
			break;
		case CURLE_FTP_COULDNT_RETR_FILE:
			return _("FTP couldn't RETR file\n");
			break;
		case CURLE_FTP_WRITE_ERROR:
			return _("FTP write error\n");
			break;
		case CURLE_FTP_QUOTE_ERROR:
			/* "quote" is an ftp command, not the typographic things, so
			 * don't translate that word */
			return _("FTP quote error\n");
			break;
		case CURLE_HTTP_NOT_FOUND:
			return _("HTTP not found\n");
			break;
		case CURLE_WRITE_ERROR:
			return _("Write error\n");
			break;
		case CURLE_MALFORMAT_USER: /* the user name is illegally specified */
			return _("User name illegally specified\n");
			break;
		case CURLE_FTP_COULDNT_STOR_FILE: /* failed FTP upload */
			return _("FTP couldn't STOR file\n");
			break;
		case CURLE_READ_ERROR: /* could open/read from file */
			return _("Read error\n");
			break;
		case CURLE_OUT_OF_MEMORY:
			return _("Out of memory\n");
			break;
		case CURLE_OPERATION_TIMEOUTED: /* the timeout time was reached */
			return _("Time out\n");
			break;
		case CURLE_FTP_COULDNT_SET_ASCII: /* TYPE A failed */
			return _("FTP couldn't set ASCII\n");
			break;
		case CURLE_FTP_PORT_FAILED: /* FTP PORT operation failed */
			return _("FTP PORT failed\n");
			break;
		case CURLE_FTP_COULDNT_USE_REST: /* the REST command failed */
			return _("FTP couldn't use REST\n");
			break;
		case CURLE_FTP_COULDNT_GET_SIZE: /* the SIZE command failed */
			return _("FTP couldn't get size\n");
			break;
		case CURLE_HTTP_RANGE_ERROR: /* The RANGE "command" didn't seem to work */
			return _("HTTP range error\n");
			break;
		case CURLE_HTTP_POST_ERROR:
			return _("HTTP POST error\n");
			break;
		case CURLE_SSL_CONNECT_ERROR: /* something was wrong when connecting with SSL */
			return _("SSL connect error\n");
			break;
		case CURLE_FTP_BAD_DOWNLOAD_RESUME: /* couldn't resume download */
			return _("FTP bad download resume\n");
			break;
		case CURLE_FILE_COULDNT_READ_FILE:
			return _("File couldn't read file\n");
			break;
		case CURLE_LDAP_CANNOT_BIND:
			return _("LDAP cannot bind\n");
			break;
		case CURLE_LDAP_SEARCH_FAILED:
			return _("LDAP search failed\n");
			break;
		case CURLE_LIBRARY_NOT_FOUND:
			return _("Library not found\n");
			break;
		case CURLE_FUNCTION_NOT_FOUND:
			return _("Function not found\n");
			break;
		case CURLE_ABORTED_BY_CALLBACK:
			return _("Aborted by callback\n");
			break;
		case CURLE_BAD_FUNCTION_ARGUMENT:
			return _("Bad function argument\n");
			break;
		case CURLE_BAD_CALLING_ORDER:
			return _("Bad calling order\n");
			break;
                case CURLE_HTTP_PORT_FAILED:
                  return _("HTTP Interface operation failed\n");
                  break;
                case CURLE_BAD_PASSWORD_ENTERED:
                  return _("my_getpass() returns fail\n");
                  break;
                case CURLE_TOO_MANY_REDIRECTS :
                  return _("catch endless re-direct loops\n");
                  break;
                case CURLE_UNKNOWN_TELNET_OPTION:
                  return _("User specified an unknown option\n");
                  break;
                case CURLE_TELNET_OPTION_SYNTAX :
                  return _("Malformed telnet option\n");
                  break;
                case CURLE_OBSOLETE:
                  return _("removed after 7.7.3\n");
                  break;
                case CURLE_SSL_PEER_CERTIFICATE:
                  return _("peer's certificate wasn't ok\n");
                  break;
                case CURLE_GOT_NOTHING:
                  return _("when this is a specific error\n");
                  break;
                case CURLE_SSL_ENGINE_NOTFOUND:
                  return _("SSL crypto engine not found\n");
                  break;
                case CURLE_SSL_ENGINE_SETFAILED:
                  return _("can not set SSL crypto engine as default\n");
                  break;
                case CURLE_SEND_ERROR:
                  return _("failed sending network data\n");
                  break;
                case CURLE_RECV_ERROR:
                  return _("failure in receiving network data\n");
                  break;
                case CURLE_SHARE_IN_USE:
                  return _("share is in use\n");
                  break;
                case CURLE_SSL_CERTPROBLEM:
                  return _("problem with the local certificate\n");
                  break;
                case CURLE_SSL_CIPHER:
                  return _("couldn't use specified cipher\n");
                  break;
                case CURLE_SSL_CACERT:
                  return _("problem with the CA cert (path?)\n");
                  break;
                case CURLE_BAD_CONTENT_ENCODING:
                  return _("Unrecognized transfer encoding\n");
                  break;


		default:
			return my_asprintf(_("Unknown error code %d\n"), rescurl);
			break;
		}
	}
	return "";
}


/************************** Gateway to Perl ****************************/

MODULE = curl_download		PACKAGE = curl_download
PROTOTYPES : DISABLE

char *
download_real(url, location, downloadprogress_callback, proxy, proxy_user)
     char * url
     char * location
     SV * downloadprogress_callback
     char * proxy
     char * proxy_user
	CODE:
                downloadprogress_callback_sv = downloadprogress_callback;
                RETVAL = download_url_real(url, location, proxy, proxy_user);
        OUTPUT:
                RETVAL