mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-05 10:27:15 +00:00
30ac01cca7
to usage.h to document the -q option.
751 lines
18 KiB
C
751 lines
18 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* wget - retrieve a file using HTTP or FTP
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*
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* Chip Rosenthal Covad Communications <chip@laserlink.net>
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*
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include "busybox.h"
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/* Stupid libc5 doesn't define this... */
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#ifndef timersub
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#define timersub(a, b, result) \
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do { \
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(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
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(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
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if ((result)->tv_usec < 0) { \
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--(result)->tv_sec; \
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(result)->tv_usec += 1000000; \
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} \
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} while (0)
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#endif
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struct host_info {
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char *host;
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int port;
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char *path;
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int is_ftp;
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char *user;
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};
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static void parse_url(char *url, struct host_info *h);
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static FILE *open_socket(char *host, int port);
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static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
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static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);
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static void progressmeter(int flag);
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/* Globals (can be accessed from signal handlers */
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static off_t filesize = 0; /* content-length of the file */
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static int chunked = 0; /* chunked transfer encoding */
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#ifdef BB_FEATURE_WGET_STATUSBAR
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static char *curfile; /* Name of current file being transferred. */
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static struct timeval start; /* Time a transfer started. */
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static volatile unsigned long statbytes = 0; /* Number of bytes transferred so far. */
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/* For progressmeter() -- number of seconds before xfer considered "stalled" */
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static const int STALLTIME = 5;
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#endif
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static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
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{
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if (output != stdout && do_continue==0) {
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fclose(output);
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unlink(fname_out);
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}
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}
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#define close_delete_and_die(s...) { \
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close_and_delete_outfile(output, fname_out, do_continue); \
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error_msg_and_die(s); }
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#ifdef BB_FEATURE_WGET_AUTHENTICATION
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/*
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* Base64-encode character string
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* oops... isn't something similar in uuencode.c?
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* It would be better to use already existing code
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*/
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char *base64enc(char *p, char *buf, int len) {
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char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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"0123456789+/";
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char *s = buf;
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while(*p) {
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if (s >= buf+len-4)
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error_msg_and_die("buffer overflow");
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*(s++) = al[(*p >> 2) & 0x3F];
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*(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)];
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*s = *(s+1) = '=';
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*(s+2) = 0;
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if (! *(++p)) break;
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*(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)];
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if (! *(++p)) break;
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*(s++) = al[*(p++) & 0x3F];
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}
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return buf;
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}
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#endif
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int wget_main(int argc, char **argv)
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{
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int n, try=5, status;
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int port;
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char *proxy;
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char *s, buf[512];
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struct stat sbuf;
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struct host_info server, target;
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FILE *sfp = NULL; /* socket to web/ftp server */
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FILE *dfp = NULL; /* socket to ftp server (data) */
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char *fname_out = NULL; /* where to direct output (-O) */
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int do_continue = 0; /* continue a prev transfer (-c) */
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long beg_range = 0L; /* range at which continue begins */
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int got_clen = 0; /* got content-length: from server */
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FILE *output; /* socket to web server */
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int quiet_flag = FALSE; /* Be verry, verry quiet... */
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/*
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* Crack command line.
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*/
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while ((n = getopt(argc, argv, "cqO:")) != EOF) {
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switch (n) {
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case 'c':
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++do_continue;
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break;
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case 'q':
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quiet_flag = TRUE;
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break;
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case 'O':
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/* can't set fname_out to NULL if outputting to stdout, because
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* this gets interpreted as the auto-gen output filename
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* case below - tausq@debian.org
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*/
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fname_out = optarg;
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break;
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default:
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show_usage();
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}
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}
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if (argc - optind != 1)
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show_usage();
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parse_url(argv[optind], &target);
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server.host = target.host;
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server.port = target.port;
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/*
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* Use the proxy if necessary.
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*/
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proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
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if (proxy)
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parse_url(xstrdup(proxy), &server);
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/* Guess an output filename */
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if (!fname_out) {
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fname_out =
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#ifdef BB_FEATURE_WGET_STATUSBAR
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curfile =
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#endif
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get_last_path_component(target.path);
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if (fname_out==NULL || strlen(fname_out)<1) {
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fname_out =
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#ifdef BB_FEATURE_WGET_STATUSBAR
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curfile =
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#endif
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"index.html";
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}
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#ifdef BB_FEATURE_WGET_STATUSBAR
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} else {
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curfile = get_last_path_component(fname_out);
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#endif
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}
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if (do_continue && !fname_out)
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error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
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/*
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* Open the output file stream.
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*/
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if (strcmp(fname_out, "-") == 0) {
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output = stdout;
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} else {
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output = xfopen(fname_out, (do_continue ? "a" : "w"));
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}
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/*
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* Determine where to start transfer.
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*/
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if (do_continue) {
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if (fstat(fileno(output), &sbuf) < 0)
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perror_msg_and_die("fstat()");
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if (sbuf.st_size > 0)
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beg_range = sbuf.st_size;
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else
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do_continue = 0;
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}
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if (proxy || !target.is_ftp) {
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/*
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* HTTP session
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*/
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do {
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if (! --try)
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close_delete_and_die("too many redirections");
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/*
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* Open socket to http server
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*/
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if (sfp) fclose(sfp);
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sfp = open_socket(server.host, server.port);
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/*
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* Send HTTP request.
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*/
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if (proxy) {
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fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
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target.is_ftp ? "f" : "ht", target.host,
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target.port, target.path);
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} else {
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fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
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}
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fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
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#ifdef BB_FEATURE_WGET_AUTHENTICATION
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if (target.user) {
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fprintf(sfp, "Authorization: Basic %s\r\n",
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base64enc(target.user, buf, sizeof(buf)));
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}
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if (proxy && server.user) {
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fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
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base64enc(server.user, buf, sizeof(buf)));
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}
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#endif
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if (do_continue)
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fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
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fprintf(sfp,"Connection: close\r\n\r\n");
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/*
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* Retrieve HTTP response line and check for "200" status code.
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*/
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read_response: if (fgets(buf, sizeof(buf), sfp) == NULL)
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close_delete_and_die("no response from server");
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for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
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;
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for ( ; isspace(*s) ; ++s)
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;
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switch (status = atoi(s)) {
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case 0:
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case 100:
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while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
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goto read_response;
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case 200:
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if (do_continue && output != stdout)
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output = freopen(fname_out, "w", output);
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do_continue = 0;
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break;
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case 300: /* redirection */
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case 301:
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case 302:
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case 303:
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break;
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case 206:
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if (do_continue)
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break;
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/*FALLTHRU*/
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default:
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chomp(buf);
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close_delete_and_die("server returned error %d: %s", atoi(s), buf);
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}
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/*
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* Retrieve HTTP headers.
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*/
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while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
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if (strcasecmp(buf, "content-length") == 0) {
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filesize = atol(s);
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got_clen = 1;
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continue;
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}
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if (strcasecmp(buf, "transfer-encoding") == 0) {
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if (strcasecmp(s, "chunked") == 0) {
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chunked = got_clen = 1;
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} else {
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close_delete_and_die("server wants to do %s transfer encoding", s);
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}
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}
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if (strcasecmp(buf, "location") == 0) {
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if (s[0] == '/')
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target.path = xstrdup(s+1);
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else {
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parse_url(xstrdup(s), &target);
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if (!proxy) {
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server.host = target.host;
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server.port = target.port;
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}
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}
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}
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}
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} while(status >= 300);
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dfp = sfp;
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}
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else
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{
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/*
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* FTP session
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*/
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if (! target.user)
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target.user = xstrdup("anonymous:busybox@");
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sfp = open_socket(server.host, server.port);
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if (ftpcmd(NULL, NULL, sfp, buf) != 220)
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close_delete_and_die("%s", buf+4);
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/*
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* Splitting username:password pair,
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* trying to log in
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*/
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s = strchr(target.user, ':');
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if (s)
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*(s++) = '\0';
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switch(ftpcmd("USER ", target.user, sfp, buf)) {
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case 230:
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break;
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case 331:
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if (ftpcmd("PASS ", s, sfp, buf) == 230)
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break;
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/* FALLTHRU (failed login) */
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default:
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close_delete_and_die("ftp login: %s", buf+4);
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}
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ftpcmd("CDUP", NULL, sfp, buf);
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ftpcmd("TYPE I", NULL, sfp, buf);
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/*
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* Querying file size
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*/
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if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
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filesize = atol(buf+4);
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got_clen = 1;
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}
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/*
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* Entering passive mode
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*/
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if (ftpcmd("PASV", NULL, sfp, buf) != 227)
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close_delete_and_die("PASV: %s", buf+4);
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s = strrchr(buf, ',');
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*s = 0;
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port = atoi(s+1);
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s = strrchr(buf, ',');
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port += atoi(s+1) * 256;
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dfp = open_socket(server.host, port);
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if (do_continue) {
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sprintf(buf, "REST %ld", beg_range);
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if (ftpcmd(buf, NULL, sfp, buf) != 350) {
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if (output != stdout)
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output = freopen(fname_out, "w", output);
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do_continue = 0;
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} else
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filesize -= beg_range;
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}
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if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
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close_delete_and_die("RETR: %s", buf+4);
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}
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/*
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* Retrieve file
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*/
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if (chunked) {
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fgets(buf, sizeof(buf), dfp);
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filesize = strtol(buf, (char **) NULL, 16);
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}
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#ifdef BB_FEATURE_WGET_STATUSBAR
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if (quiet_flag==FALSE)
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progressmeter(-1);
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#endif
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do {
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while ((filesize > 0 || !got_clen) && (n = fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) {
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fwrite(buf, 1, n, output);
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#ifdef BB_FEATURE_WGET_STATUSBAR
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statbytes+=n;
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#endif
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if (got_clen)
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filesize -= n;
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}
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if (chunked) {
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fgets(buf, sizeof(buf), dfp); /* This is a newline */
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fgets(buf, sizeof(buf), dfp);
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filesize = strtol(buf, (char **) NULL, 16);
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if (filesize==0) chunked = 0; /* all done! */
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}
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if (n == 0 && ferror(dfp))
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perror_msg_and_die("network read error");
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} while (chunked);
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#ifdef BB_FEATURE_WGET_STATUSBAR
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if (quiet_flag==FALSE)
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progressmeter(1);
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#endif
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if (!proxy && target.is_ftp) {
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fclose(dfp);
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if (ftpcmd(NULL, NULL, sfp, buf) != 226)
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error_msg_and_die("ftp error: %s", buf+4);
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ftpcmd("QUIT", NULL, sfp, buf);
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}
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exit(EXIT_SUCCESS);
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}
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void parse_url(char *url, struct host_info *h)
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{
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char *cp, *sp, *up;
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if (strncmp(url, "http://", 7) == 0) {
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h->port = 80;
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h->host = url + 7;
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h->is_ftp = 0;
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} else if (strncmp(url, "ftp://", 6) == 0) {
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h->port = 21;
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h->host = url + 6;
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h->is_ftp = 1;
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} else
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error_msg_and_die("not an http or ftp url: %s", url);
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sp = strchr(h->host, '/');
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if (sp != NULL) {
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*sp++ = '\0';
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h->path = sp;
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} else
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h->path = "";
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up = strrchr(h->host, '@');
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if (up != NULL) {
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h->user = h->host;
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*up++ = '\0';
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h->host = up;
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} else
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h->user = NULL;
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cp = strchr(h->host, ':');
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if (cp != NULL) {
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*cp++ = '\0';
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h->port = atoi(cp);
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}
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}
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FILE *open_socket(char *host, int port)
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{
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struct sockaddr_in s_in;
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struct hostent *hp;
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int fd;
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FILE *fp;
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memset(&s_in, 0, sizeof(s_in));
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s_in.sin_family = AF_INET;
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if ((hp = (struct hostent *) gethostbyname(host)) == NULL)
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error_msg_and_die("cannot resolve %s", host);
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memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
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s_in.sin_port = htons(port);
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/*
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* Get the server onto a stdio stream.
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*/
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if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
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perror_msg_and_die("socket()");
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if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
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perror_msg_and_die("connect(%s)", host);
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if ((fp = fdopen(fd, "r+")) == NULL)
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perror_msg_and_die("fdopen()");
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return fp;
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}
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char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
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{
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char *s, *hdrval;
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int c;
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*istrunc = 0;
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/* retrieve header line */
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if (fgets(buf, bufsiz, fp) == NULL)
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return NULL;
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/* see if we are at the end of the headers */
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for (s = buf ; *s == '\r' ; ++s)
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;
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if (s[0] == '\n')
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return NULL;
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/* convert the header name to lower case */
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for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
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*s = tolower(*s);
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/* verify we are at the end of the header name */
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if (*s != ':')
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error_msg_and_die("bad header line: %s", buf);
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/* locate the start of the header value */
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for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
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;
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hdrval = s;
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/* 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;
|
|
}
|
|
|
|
static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
|
|
{
|
|
char *p;
|
|
|
|
if (s1) {
|
|
if (!s2) s2="";
|
|
fprintf(fp, "%s%s\n", s1, s2);
|
|
fflush(fp);
|
|
}
|
|
|
|
do {
|
|
p = fgets(buf, 510, fp);
|
|
if (!p)
|
|
perror_msg_and_die("fgets()");
|
|
} while (! isdigit(buf[0]) || buf[3] != ' ');
|
|
|
|
return atoi(buf);
|
|
}
|
|
|
|
#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, totalsize;
|
|
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;
|
|
totalsize = filesize; /* as filesize changes.. */
|
|
}
|
|
|
|
(void) gettimeofday(&now, (struct timezone *) 0);
|
|
cursize = statbytes;
|
|
if (totalsize != 0 && !chunked) {
|
|
ratio = 100.0 * cursize / totalsize;
|
|
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 (wait.tv_sec >= STALLTIME) {
|
|
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
|
|
" - stalled -");
|
|
} else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
|
|
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
|
|
" --:-- ETA");
|
|
} else {
|
|
remaining = (int) (totalsize / (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;
|
|
putc('\n', stderr);
|
|
}
|
|
}
|
|
#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 1.36 2001/04/17 18:13:16 markw Exp $
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
Local Variables:
|
|
c-file-style: "linux"
|
|
c-basic-offset: 4
|
|
tab-width: 4
|
|
End:
|
|
*/
|
|
|
|
|
|
|