wget.c - fp2-dev/platform/external/busybox - Gitiles

 /* vi: set sw=4 ts=4: */
 /*
  * wget - retrieve a file using HTTP
  *
  * Chip Rosenthal Covad Communications <chip@laserlink.net>
  *
  * Note: According to RFC2616 section 3.6.1, "All HTTP/1.1 applications MUST be
  * able to receive and decode the "chunked" transfer-coding, and MUST ignore
  * chunk-extension extensions they do not understand."
  *
  * This prevents this particular wget app from completely RFC compliant, and as
  * such, prevents it from being used as a general purpose web browser...  This
  * is a design decision, since it makes the code smaller.
  *
  */

 #include <stdio.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <ctype.h>
 #include <string.h>
 #include <unistd.h>
 #include <signal.h>
 #include <sys/ioctl.h>

 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>

 #include "busybox.h"

 /* Stupid libc5 doesn't define this... */
 #ifndef timersub
 #define	timersub(a, b, result)						      \
   do {									      \
     (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;			      \
     (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;			      \
     if ((result)->tv_usec < 0) {					      \
       --(result)->tv_sec;						      \
       (result)->tv_usec += 1000000;					      \
     }									      \
   } while (0)
 #endif

 static void parse_url(char *url, char **uri_host, int *uri_port, char **uri_path);
 static FILE *open_socket(char *host, int port);
 static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
 static void progressmeter(int flag);

 /* Globals (can be accessed from signal handlers */
 static off_t filesize = 0;		/* content-length of the file */
 #ifdef BB_FEATURE_WGET_STATUSBAR
 static char *curfile;			/* Name of current file being transferred. */
 static struct timeval start;	/* Time a transfer started. */
 static volatile unsigned long statbytes; /* Number of bytes transferred so far. */
 /* For progressmeter() -- number of seconds before xfer considered "stalled" */
 static const int STALLTIME = 5;
 #endif

 static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
 {
 	if (output != stdout && do_continue==0) {
 		fclose(output);
 		unlink(fname_out);
 	}
 }

 int wget_main(int argc, char **argv)
 {
 	int n;
 	char *proxy, *proxy_host;
 	int uri_port, proxy_port;
 	char *s, buf[512];
 	struct stat sbuf;

 	FILE *sfp;					/* socket to web server				*/
 	char *uri_host, *uri_path;	/* parsed from command line url		*/
 	char *fname_out = NULL;		/* where to direct output (-O)		*/
 	int do_continue = 0;		/* continue a prev transfer (-c)	*/
 	long beg_range = 0L;		/*   range at which continue begins	*/
 	int got_clen = 0;			/* got content-length: from server	*/
 	FILE *output;				/* socket to web server				*/
 	int quiet_flag = FALSE;		/* Be verry, verry quiet...			*/

 	/*
 	 * Crack command line.
 	 */
 	while ((n = getopt(argc, argv, "cqO:")) != EOF) {
 		switch (n) {
 		case 'c':
 			++do_continue;
 			break;
 		case 'q':
 			quiet_flag = TRUE;
 			break;
 		case 'O':
 			/* can't set fname_out to NULL if outputting to stdout, because
 			 * this gets interpreted as the auto-gen output filename
 			 * case below  - tausq@debian.org
 			 */
 			fname_out = (strcmp(optarg, "-") == 0 ? (char *)1 : optarg);
 			break;
 		default:
 			show_usage();
 		}
 	}

 	if (argc - optind != 1)
 			show_usage();

 	/*
 	 * Use the proxy if necessary.
 	 */
 	if ((proxy = getenv("http_proxy")) != NULL) {
 		proxy = xstrdup(proxy);
 		parse_url(proxy, &proxy_host, &proxy_port, &uri_path);
 		parse_url(argv[optind], &uri_host, &uri_port, &uri_path);
 	} else {
 		/*
 		 * Parse url into components.
 		 */
 		parse_url(argv[optind], &uri_host, &uri_port, &uri_path);
 		proxy_host=uri_host;
 		proxy_port=uri_port;
 	}

 	/* Guess an output filename */
 	if (!fname_out) {
 		fname_out =
 #ifdef BB_FEATURE_WGET_STATUSBAR
 			curfile =
 #endif
 			get_last_path_component(uri_path);
 		if (fname_out==NULL || strlen(fname_out)<1) {
 			fname_out =
 #ifdef BB_FEATURE_WGET_STATUSBAR
 				curfile =
 #endif
 				"index.html";
 		}
 #ifdef BB_FEATURE_WGET_STATUSBAR
 	} else {
 		curfile=argv[optind];
 #endif
 	}
 	if (do_continue && !fname_out)
 		error_msg_and_die("cannot specify continue (-c) without a filename (-O)");


 	/*
 	 * Open socket to server.
 	 */
 	sfp = open_socket(proxy_host, proxy_port);

 	/* Make the assumption that if the file already exists
 	 * on disk that the intention is to continue downloading
 	 * a previously aborted download  -Erik */
 	if (stat(fname_out, &sbuf) == 0) {
 		++do_continue;
 	}

 	/*
 	 * Open the output file stream.
 	 */
 	if (fname_out != (char *)1) {
 		output = xfopen( fname_out, (do_continue ? "a" : "w") );
 	} else {
 		output = stdout;
 	}

 	/*
 	 * Determine where to start transfer.
 	 */
 	if (do_continue) {
 		if (fstat(fileno(output), &sbuf) < 0)
 			perror_msg_and_die("fstat()");
 		if (sbuf.st_size > 0)
 			beg_range = sbuf.st_size;
 		else
 			do_continue = 0;
 	}

 	/*
 	 * Send HTTP request.
 	 */
 	fprintf(sfp, "GET http://%s:%d/%s HTTP/1.1\r\n",
 			uri_host, uri_port, uri_path);
 	fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", uri_host);

 	if (do_continue)
 		fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
 	fprintf(sfp,"Connection: close\r\n\r\n");

 	/*
 	 * Retrieve HTTP response line and check for "200" status code.
 	 */
 	if (fgets(buf, sizeof(buf), sfp) == NULL) {
 		close_and_delete_outfile(output, fname_out, do_continue);
 		error_msg_and_die("no response from server");
 	}
 	for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
 		;
 	for ( ; isspace(*s) ; ++s)
 		;
 	switch (atoi(s)) {
 		case 0:
 		case 200:
 			break;
 		case 206:
 			if (do_continue)
 				break;
 			/*FALLTHRU*/
 		default:
 			close_and_delete_outfile(output, fname_out, do_continue);
 			chomp(buf);
 			error_msg_and_die("server returned error %d: %s", atoi(s), buf);
 	}

 	/*
 	 * Retrieve HTTP headers.
 	 */
 	while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
 		if (strcasecmp(buf, "content-length") == 0) {
 			filesize = atol(s);
 			got_clen = 1;
 			continue;
 		}
 		if (strcasecmp(buf, "transfer-encoding") == 0) {
 			close_and_delete_outfile(output, fname_out, do_continue);
 			error_msg_and_die("server wants to do %s transfer encoding", s);
 			continue;
 		}
 	}

 	/*
 	 * Retrieve HTTP body.
 	 */
 #ifdef BB_FEATURE_WGET_STATUSBAR
 	statbytes=0;
 	if (quiet_flag==FALSE)
 		progressmeter(-1);
 #endif
 	while (filesize > 0 && (n = fread(buf, 1, sizeof(buf), sfp)) > 0) {
 		fwrite(buf, 1, n, output);
 #ifdef BB_FEATURE_WGET_STATUSBAR
 		statbytes+=n;
 		if (quiet_flag==FALSE)
 			progressmeter(1);
 #endif
 		if (got_clen)
 			filesize -= n;
 	}
 	if (n == 0 && ferror(sfp))
 		perror_msg_and_die("network read error");

 	exit(0);
 }


 void parse_url(char *url, char **uri_host, int *uri_port, char **uri_path)
 {
 	char *cp, *sp;

 	*uri_port = 80;

 	if (strncmp(url, "http://", 7) != 0)
 		error_msg_and_die("not an http url: %s", url);

 	*uri_host = url + 7;

 	cp = strchr(*uri_host, ':');
 	sp = strchr(*uri_host, '/');

 	if (cp != NULL && (sp == NULL || cp < sp)) {
 		*cp++ = '\0';
 		*uri_port = atoi(cp);
 	}

 	if (sp != NULL) {
 		*sp++ = '\0';
 		*uri_path = sp;
 	} else
 		*uri_path = "";
 }


 FILE *open_socket(char *host, int port)
 {
 	struct sockaddr_in s_in;
 	struct hostent *hp;
 	int fd;
 	FILE *fp;

 	memset(&s_in, 0, sizeof(s_in));
 	s_in.sin_family = AF_INET;
 	if ((hp = (struct hostent *) gethostbyname(host)) == NULL)
 		error_msg_and_die("cannot resolve %s", host);
 	memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
 	s_in.sin_port = htons(port);

 	/*
 	 * Get the server onto a stdio stream.
 	 */
 	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
 		perror_msg_and_die("socket()");
 	if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
 		perror_msg_and_die("connect(%s)", host);
 	if ((fp = fdopen(fd, "r+")) == NULL)
 		perror_msg_and_die("fdopen()");

 	return fp;
 }


 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
 {
 	char *s, *hdrval;
 	int c;

 	*istrunc = 0;

 	/* retrieve header line */
 	if (fgets(buf, bufsiz, fp) == NULL)
 		return NULL;

 	/* see if we are at the end of the headers */
 	for (s = buf ; *s == '\r' ; ++s)
 		;
 	if (s[0] == '\n')
 		return NULL;

 	/* convert the header name to lower case */
 	for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
 		*s = tolower(*s);

 	/* verify we are at the end of the header name */
 	if (*s != ':')
 		error_msg_and_die("bad header line: %s", buf);

 	/* locate the start of the header value */
 	for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
 		;
 	hdrval = s;

 	/* locate the end of header */
 	while (*s != '\0' && *s != '\r' && *s != '\n')
 		++s;

 	/* end of header found */
 	if (*s != '\0') {
 		*s = '\0';
 		return hdrval;
 	}

 	/* Rats!  The buffer isn't big enough to hold the entire header value. */
 	while (c = getc(fp), c != EOF && c != '\n')
 		;
 	*istrunc = 1;
 	return hdrval;
 }

 #ifdef BB_FEATURE_WGET_STATUSBAR
 /* Stuff below is from BSD rcp util.c, as added to openshh.
  * Original copyright notice is retained at the end of this file.
  *
  */


 static int
 getttywidth(void)
 {
 	struct winsize winsize;

 	if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
 		return (winsize.ws_col ? winsize.ws_col : 80);
 	else
 		return (80);
 }

 static void
 updateprogressmeter(int ignore)
 {
 	int save_errno = errno;

 	progressmeter(0);
 	errno = save_errno;
 }

 static void
 alarmtimer(int wait)
 {
 	struct itimerval itv;

 	itv.it_value.tv_sec = wait;
 	itv.it_value.tv_usec = 0;
 	itv.it_interval = itv.it_value;
 	setitimer(ITIMER_REAL, &itv, NULL);
 }


 static void
 progressmeter(int flag)
 {
 	static const char prefixes[] = " KMGTP";
 	static struct timeval lastupdate;
 	static off_t lastsize;
 	struct timeval now, td, wait;
 	off_t cursize, abbrevsize;
 	double elapsed;
 	int ratio, barlength, i, remaining;
 	char buf[256];

 	if (flag == -1) {
 		(void) gettimeofday(&start, (struct timezone *) 0);
 		lastupdate = start;
 		lastsize = 0;
 	}

 	(void) gettimeofday(&now, (struct timezone *) 0);
 	cursize = statbytes;
 	if (filesize != 0) {
 		ratio = 100.0 * cursize / filesize;
 		ratio = MAX(ratio, 0);
 		ratio = MIN(ratio, 100);
 	} else
 		ratio = 100;

 	snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);

 	barlength = getttywidth() - 51;
 	if (barlength > 0) {
 		i = barlength * ratio / 100;
 		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 			 "|%.*s%*s|", i,
 			 "*****************************************************************************"
 			 "*****************************************************************************",
 			 barlength - i, "");
 	}
 	i = 0;
 	abbrevsize = cursize;
 	while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
 		i++;
 		abbrevsize >>= 10;
 	}
 	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
 	     (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
 		 'B');

 	timersub(&now, &lastupdate, &wait);
 	if (cursize > lastsize) {
 		lastupdate = now;
 		lastsize = cursize;
 		if (wait.tv_sec >= STALLTIME) {
 			start.tv_sec += wait.tv_sec;
 			start.tv_usec += wait.tv_usec;
 		}
 		wait.tv_sec = 0;
 	}
 	timersub(&now, &start, &td);
 	elapsed = td.tv_sec + (td.tv_usec / 1000000.0);

 	if (statbytes <= 0 || elapsed <= 0.0 || cursize > filesize) {
 		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 			 "   --:-- ETA");
 	} else if (wait.tv_sec >= STALLTIME) {
 		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 			 " - stalled -");
 	} else {
 		remaining = (int) (filesize / (statbytes / elapsed) - elapsed);
 		i = remaining / 3600;
 		if (i)
 			snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 				 "%2d:", i);
 		else
 			snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 				 "   ");
 		i = remaining % 3600;
 		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 			 "%02d:%02d ETA", i / 60, i % 60);
 	}
 	write(fileno(stderr), buf, strlen(buf));

 	if (flag == -1) {
 		struct sigaction sa;
 		sa.sa_handler = updateprogressmeter;
 		sigemptyset(&sa.sa_mask);
 		sa.sa_flags = SA_RESTART;
 		sigaction(SIGALRM, &sa, NULL);
 		alarmtimer(1);
 	} else if (flag == 1) {
 		alarmtimer(0);
 		statbytes = 0;
 	}
 }
 #endif

 /* Original copyright notice which applies to the BB_FEATURE_WGET_STATUSBAR stuff,
  * much of which was blatently stolen from openssh.  */

 /*-
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
  *		ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
  *
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
  *	$Id: wget.c,v 1.30 2001/03/21 07:34:26 andersen Exp $
  */


 /*
 Local Variables:
 c-file-style: "linux"
 c-basic-offset: 4
 tab-width: 4
 End:
 */
	/* vi: set sw=4 ts=4: */
	/*
	* wget - retrieve a file using HTTP
	*
	* Chip Rosenthal Covad Communications <chip@laserlink.net>
	*
	* Note: According to RFC2616 section 3.6.1, "All HTTP/1.1 applications MUST be
	* able to receive and decode the "chunked" transfer-coding, and MUST ignore
	* chunk-extension extensions they do not understand."
	*
	* This prevents this particular wget app from completely RFC compliant, and as
	* such, prevents it from being used as a general purpose web browser... This
	* is a design decision, since it makes the code smaller.
	*
	*/

	#include <stdio.h>
	#include <errno.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <ctype.h>
	#include <string.h>
	#include <unistd.h>
	#include <signal.h>
	#include <sys/ioctl.h>

	#include <sys/time.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>
	#include <netdb.h>

	#include "busybox.h"

	/* Stupid libc5 doesn't define this... */
	#ifndef timersub
	#define timersub(a, b, result) \
	do { \
	(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
	(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
	if ((result)->tv_usec < 0) { \
	--(result)->tv_sec; \
	(result)->tv_usec += 1000000; \
	} \
	} while (0)
	#endif

	static void parse_url(char url, char uri_host, int uri_port, char **uri_path);
	static FILE open_socket(char host, int port);
	static char gethdr(char buf, size_t bufsiz, FILE fp, int istrunc);
	static void progressmeter(int flag);

	/* Globals (can be accessed from signal handlers */
	static off_t filesize = 0; /* content-length of the file */
	#ifdef BB_FEATURE_WGET_STATUSBAR
	static char curfile; / Name of current file being transferred. */
	static struct timeval start; /* Time a transfer started. */
	static volatile unsigned long statbytes; /* Number of bytes transferred so far. */
	/* For progressmeter() -- number of seconds before xfer considered "stalled" */
	static const int STALLTIME = 5;
	#endif

	static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
	{
	if (output != stdout && do_continue==0) {
	fclose(output);
	unlink(fname_out);
	}
	}

	int wget_main(int argc, char **argv)
	{
	int n;
	char proxy, proxy_host;
	int uri_port, proxy_port;
	char *s, buf[512];
	struct stat sbuf;

	FILE sfp; / socket to web server */
	char uri_host, uri_path; /* parsed from command line url */
	char fname_out = NULL; / where to direct output (-O) */
	int do_continue = 0; /* continue a prev transfer (-c) */
	long beg_range = 0L; /* range at which continue begins */
	int got_clen = 0; /* got content-length: from server */
	FILE output; / socket to web server */
	int quiet_flag = FALSE; /* Be verry, verry quiet... */

	/*
	* Crack command line.
	*/
	while ((n = getopt(argc, argv, "cqO:")) != EOF) {
	switch (n) {
	case 'c':
	++do_continue;
	break;
	case 'q':
	quiet_flag = TRUE;
	break;
	case 'O':
	/* can't set fname_out to NULL if outputting to stdout, because
	* this gets interpreted as the auto-gen output filename
	* case below - tausq@debian.org
	*/
	fname_out = (strcmp(optarg, "-") == 0 ? (char *)1 : optarg);
	break;
	default:
	show_usage();
	}
	}

	if (argc - optind != 1)
	show_usage();

	/*
	* Use the proxy if necessary.
	*/
	if ((proxy = getenv("http_proxy")) != NULL) {
	proxy = xstrdup(proxy);
	parse_url(proxy, &proxy_host, &proxy_port, &uri_path);
	parse_url(argv[optind], &uri_host, &uri_port, &uri_path);
	} else {
	/*
	* Parse url into components.
	*/
	parse_url(argv[optind], &uri_host, &uri_port, &uri_path);
	proxy_host=uri_host;
	proxy_port=uri_port;
	}

	/* Guess an output filename */
	if (!fname_out) {
	fname_out =
	#ifdef BB_FEATURE_WGET_STATUSBAR
	curfile =
	#endif
	get_last_path_component(uri_path);
	if (fname_out==NULL \|\| strlen(fname_out)<1) {
	fname_out =
	#ifdef BB_FEATURE_WGET_STATUSBAR
	curfile =
	#endif
	"index.html";
	}
	#ifdef BB_FEATURE_WGET_STATUSBAR
	} else {
	curfile=argv[optind];
	#endif
	}
	if (do_continue && !fname_out)
	error_msg_and_die("cannot specify continue (-c) without a filename (-O)");


	/*
	* Open socket to server.
	*/
	sfp = open_socket(proxy_host, proxy_port);

	/* Make the assumption that if the file already exists
	* on disk that the intention is to continue downloading
	* a previously aborted download -Erik */
	if (stat(fname_out, &sbuf) == 0) {
	++do_continue;
	}

	/*
	* Open the output file stream.
	*/
	if (fname_out != (char *)1) {
	output = xfopen( fname_out, (do_continue ? "a" : "w") );
	} else {
	output = stdout;
	}

	/*
	* Determine where to start transfer.
	*/
	if (do_continue) {
	if (fstat(fileno(output), &sbuf) < 0)
	perror_msg_and_die("fstat()");
	if (sbuf.st_size > 0)
	beg_range = sbuf.st_size;
	else
	do_continue = 0;
	}

	/*
	* Send HTTP request.
	*/
	fprintf(sfp, "GET http://%s:%d/%s HTTP/1.1\r\n",
	uri_host, uri_port, uri_path);
	fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", uri_host);

	if (do_continue)
	fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
	fprintf(sfp,"Connection: close\r\n\r\n");

	/*
	* Retrieve HTTP response line and check for "200" status code.
	*/
	if (fgets(buf, sizeof(buf), sfp) == NULL) {
	close_and_delete_outfile(output, fname_out, do_continue);
	error_msg_and_die("no response from server");
	}
	for (s = buf ; s != '\0' && !isspace(s) ; ++s)
	;
	for ( ; isspace(*s) ; ++s)
	;
	switch (atoi(s)) {
	case 0:
	case 200:
	break;
	case 206:
	if (do_continue)
	break;
	/FALLTHRU/
	default:
	close_and_delete_outfile(output, fname_out, do_continue);
	chomp(buf);
	error_msg_and_die("server returned error %d: %s", atoi(s), buf);
	}

	/*
	* Retrieve HTTP headers.
	*/
	while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
	if (strcasecmp(buf, "content-length") == 0) {
	filesize = atol(s);
	got_clen = 1;
	continue;
	}
	if (strcasecmp(buf, "transfer-encoding") == 0) {
	close_and_delete_outfile(output, fname_out, do_continue);
	error_msg_and_die("server wants to do %s transfer encoding", s);
	continue;
	}
	}

	/*
	* Retrieve HTTP body.
	*/
	#ifdef BB_FEATURE_WGET_STATUSBAR
	statbytes=0;
	if (quiet_flag==FALSE)
	progressmeter(-1);
	#endif
	while (filesize > 0 && (n = fread(buf, 1, sizeof(buf), sfp)) > 0) {
	fwrite(buf, 1, n, output);
	#ifdef BB_FEATURE_WGET_STATUSBAR
	statbytes+=n;
	if (quiet_flag==FALSE)
	progressmeter(1);
	#endif
	if (got_clen)
	filesize -= n;
	}
	if (n == 0 && ferror(sfp))
	perror_msg_and_die("network read error");

	exit(0);
	}


	void parse_url(char url, char uri_host, int uri_port, char **uri_path)
	{
	char cp, sp;

	*uri_port = 80;

	if (strncmp(url, "http://", 7) != 0)
	error_msg_and_die("not an http url: %s", url);

	*uri_host = url + 7;

	cp = strchr(*uri_host, ':');
	sp = strchr(*uri_host, '/');

	if (cp != NULL && (sp == NULL \|\| cp < sp)) {
	*cp++ = '\0';
	*uri_port = atoi(cp);
	}

	if (sp != NULL) {
	*sp++ = '\0';
	*uri_path = sp;
	} else
	*uri_path = "";
	}


	FILE open_socket(char host, int port)
	{
	struct sockaddr_in s_in;
	struct hostent *hp;
	int fd;
	FILE *fp;

	memset(&s_in, 0, sizeof(s_in));
	s_in.sin_family = AF_INET;
	if ((hp = (struct hostent *) gethostbyname(host)) == NULL)
	error_msg_and_die("cannot resolve %s", host);
	memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
	s_in.sin_port = htons(port);

	/*
	* Get the server onto a stdio stream.
	*/
	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
	perror_msg_and_die("socket()");
	if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
	perror_msg_and_die("connect(%s)", host);
	if ((fp = fdopen(fd, "r+")) == NULL)
	perror_msg_and_die("fdopen()");

	return fp;
	}


	char gethdr(char buf, size_t bufsiz, FILE fp, int istrunc)
	{
	char s, hdrval;
	int c;

	*istrunc = 0;

	/* retrieve header line */
	if (fgets(buf, bufsiz, fp) == NULL)
	return NULL;

	/* see if we are at the end of the headers */
	for (s = buf ; *s == '\r' ; ++s)
	;
	if (s[0] == '\n')
	return NULL;

	/* convert the header name to lower case */
	for (s = buf ; isalnum(s) \|\| s == '-' ; ++s)
	s = tolower(s);

	/* verify we are at the end of the header name */
	if (*s != ':')
	error_msg_and_die("bad header line: %s", buf);

	/* locate the start of the header value */
	for (s++ = '\0' ; s == ' ' \|\| *s == '\t' ; ++s)
	;
	hdrval = s;

	/* locate the end of header */
	while (s != '\0' && s != '\r' && *s != '\n')
	++s;

	/* end of header found */
	if (*s != '\0') {
	*s = '\0';
	return hdrval;
	}

	/* Rats! The buffer isn't big enough to hold the entire header value. */
	while (c = getc(fp), c != EOF && c != '\n')
	;
	*istrunc = 1;
	return hdrval;
	}

	#ifdef BB_FEATURE_WGET_STATUSBAR
	/* Stuff below is from BSD rcp util.c, as added to openshh.
	* Original copyright notice is retained at the end of this file.
	*
	*/


	static int
	getttywidth(void)
	{
	struct winsize winsize;

	if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
	return (winsize.ws_col ? winsize.ws_col : 80);
	else
	return (80);
	}

	static void
	updateprogressmeter(int ignore)
	{
	int save_errno = errno;

	progressmeter(0);
	errno = save_errno;
	}

	static void
	alarmtimer(int wait)
	{
	struct itimerval itv;

	itv.it_value.tv_sec = wait;
	itv.it_value.tv_usec = 0;
	itv.it_interval = itv.it_value;
	setitimer(ITIMER_REAL, &itv, NULL);
	}


	static void
	progressmeter(int flag)
	{
	static const char prefixes[] = " KMGTP";
	static struct timeval lastupdate;
	static off_t lastsize;
	struct timeval now, td, wait;
	off_t cursize, abbrevsize;
	double elapsed;
	int ratio, barlength, i, remaining;
	char buf[256];

	if (flag == -1) {
	(void) gettimeofday(&start, (struct timezone *) 0);
	lastupdate = start;
	lastsize = 0;
	}

	(void) gettimeofday(&now, (struct timezone *) 0);
	cursize = statbytes;
	if (filesize != 0) {
	ratio = 100.0 * cursize / filesize;
	ratio = MAX(ratio, 0);
	ratio = MIN(ratio, 100);
	} else
	ratio = 100;

	snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);

	barlength = getttywidth() - 51;
	if (barlength > 0) {
	i = barlength * ratio / 100;
	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
	"\|%.s%s\|", i,
	"*****************************************************************************"
	"*****************************************************************************",
	barlength - i, "");
	}
	i = 0;
	abbrevsize = cursize;
	while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
	i++;
	abbrevsize >>= 10;
	}
	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
	(int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
	'B');

	timersub(&now, &lastupdate, &wait);
	if (cursize > lastsize) {
	lastupdate = now;
	lastsize = cursize;
	if (wait.tv_sec >= STALLTIME) {
	start.tv_sec += wait.tv_sec;
	start.tv_usec += wait.tv_usec;
	}
	wait.tv_sec = 0;
	}
	timersub(&now, &start, &td);
	elapsed = td.tv_sec + (td.tv_usec / 1000000.0);

	if (statbytes <= 0 \|\| elapsed <= 0.0 \|\| cursize > filesize) {
	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
	" --:-- ETA");
	} else if (wait.tv_sec >= STALLTIME) {
	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
	" - stalled -");
	} else {
	remaining = (int) (filesize / (statbytes / elapsed) - elapsed);
	i = remaining / 3600;
	if (i)
	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
	"%2d:", i);
	else
	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
	" ");
	i = remaining % 3600;
	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
	"%02d:%02d ETA", i / 60, i % 60);
	}
	write(fileno(stderr), buf, strlen(buf));

	if (flag == -1) {
	struct sigaction sa;
	sa.sa_handler = updateprogressmeter;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;
	sigaction(SIGALRM, &sa, NULL);
	alarmtimer(1);
	} else if (flag == 1) {
	alarmtimer(0);
	statbytes = 0;
	}
	}
	#endif

	/* Original copyright notice which applies to the BB_FEATURE_WGET_STATUSBAR stuff,
	* much of which was blatently stolen from openssh. */

	/*-
	* Copyright (c) 1992, 1993
	* The Regents of the University of California. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
	* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
	*
	* 4. Neither the name of the University nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*
	* $Id: wget.c,v 1.30 2001/03/21 07:34:26 andersen Exp $
	*/



	/*
	Local Variables:
	c-file-style: "linux"
	c-basic-offset: 4
	tab-width: 4
	End:
	*/