X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=wget.c;h=5bec0ddd5a918dd9d5a31a981e665ee0b56395bd;hb=303dd28bb0120c8b12c886cadb2d25d1b8fea08b;hp=c95271b0da1460db0b7e45bc825c348bb62f46b6;hpb=25b669c144949816d3c9726c79dbd6e93d53ee8b;p=oweals%2Fbusybox.git diff --git a/wget.c b/wget.c index c95271b0d..5bec0ddd5 100644 --- a/wget.c +++ b/wget.c @@ -1,19 +1,30 @@ /* vi: set sw=4 ts=4: */ /* - * wget - retrieve a file using HTTP + * wget - retrieve a file using HTTP or FTP + * + * Chip Rosenthal Covad Communications + * + * 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. * - * Chip Rosenthal - * Covad Communications - * */ -#include "busybox.h" #include +#include #include #include #include #include +#include +#include +#include +#include #include #include #include @@ -21,192 +32,452 @@ #include #include +#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 + +struct host_info { + char *host; + int port; + char *path; + int is_ftp; + char *user; +}; + +static void parse_url(char *url, struct host_info *h); +static FILE *open_socket(char *host, int port); +static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc); +static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf); +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); + } +} -void parse_url(char *url, char **uri_host, int *uri_port, char **uri_path); -FILE *open_socket(char *host, int port); -char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc); +#define close_delete_and_die(s...) { \ + close_and_delete_outfile(output, fname_out, do_continue); \ + error_msg_and_die(s); } +#ifdef BB_FEATURE_WGET_AUTHENTICATION +/* + * Base64-encode character string + * oops... isn't something similar in uuencode.c? + * It would be better to use already existing code + */ +char *base64enc(char *p, char *buf, int len) { + + char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789+/"; + char *s = buf; + + while(*p) { + if (s >= buf+len-4) + error_msg_and_die("buffer overflow"); + *(s++) = al[(*p >> 2) & 0x3F]; + *(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)]; + *s = *(s+1) = '='; + *(s+2) = 0; + if (! *(++p)) break; + *(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)]; + if (! *(++p)) break; + *(s++) = al[*(p++) & 0x3F]; + } + + return buf; +} +#endif + int wget_main(int argc, char **argv) { - FILE *sfp; /* socket to web server */ - char *uri_host, *uri_path; /* parsed from command line url */ - int uri_port; + int n, try=5, status; + int port; + char *proxy; char *s, buf[512]; - int n; + struct stat sbuf; + + struct host_info server, target; + FILE *sfp = NULL; /* socket to web/ftp server */ + FILE *dfp = NULL; /* socket to ftp server (data) */ 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 */ - long clen = 1L; /* the content length */ + FILE *output; /* socket to web server */ + int quiet_flag = FALSE; /* Be verry, verry quiet... */ /* * Crack command line. */ - while ((n = getopt(argc, argv, "cO:")) != EOF) { + while ((n = getopt(argc, argv, "cqO:")) != EOF) { switch (n) { case 'c': ++do_continue; break; + case 'q': + quiet_flag = TRUE; + break; case 'O': - fname_out = (strcmp(optarg, "-") == 0 ? NULL : optarg); + /* 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: - usage(wget_usage); + show_usage(); } } if (argc - optind != 1) - usage(wget_usage); + show_usage(); + + parse_url(argv[optind], &target); + server.host = target.host; + server.port = target.port; + /* + * Use the proxy if necessary. + */ + proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy"); + if (proxy) + parse_url(xstrdup(proxy), &server); + /* Guess an output filename */ if (!fname_out) { - fname_out = get_last_path_component(argv[optind]); + fname_out = +#ifdef BB_FEATURE_WGET_STATUSBAR + curfile = +#endif + get_last_path_component(target.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 = get_last_path_component(fname_out); +#endif } - if (do_continue && !fname_out) - fatalError("wget: cannot specify continue (-c) without a filename (-O)\n"); - - /* - * Parse url into components. - */ - parse_url(argv[optind], &uri_host, &uri_port, &uri_path); + error_msg_and_die("cannot specify continue (-c) without a filename (-O)"); - /* - * Open socket to server. - */ - sfp = open_socket(uri_host, uri_port); /* - * Open the output stream. + * Open the output file stream. */ - if (fname_out != NULL) { - if (freopen(fname_out, (do_continue ? "a" : "w"), stdout) == NULL) - fatalError("wget: freopen(%s): %s\n", fname_out, strerror(errno)); + if (fname_out != (char *)1) { + output = xfopen( fname_out, (do_continue ? "a" : "w") ); + } else { + output = stdout; } /* * Determine where to start transfer. */ if (do_continue) { - struct stat sbuf; - if (fstat(fileno(stdout), &sbuf) < 0) - fatalError("wget: fstat(): %s\n", strerror(errno)); + 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 %s HTTP/1.1\r\nHost: %s\r\n", uri_path, uri_host); - if (do_continue) - fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range); - fputs("Connection: close\r\n\r\n", sfp); - - /* - * Retrieve HTTP response line and check for "200" status code. - */ - if (fgets(buf, sizeof(buf), sfp) == NULL) - fatalError("wget: no response from server\n"); - for (s = buf ; *s != '\0' && !isspace(*s) ; ++s) - ; - for ( ; isspace(*s) ; ++s) - ; - switch (atoi(s)) { - case 200: - if (!do_continue) - break; - fatalError("wget: cannot continue - server does not properly support ranges\n"); - case 206: - if (do_continue) - break; - /*FALLTHRU*/ - default: - fatalError("wget: server returned error: %s", buf); + if (proxy || !target.is_ftp) { + /* + * HTTP session + */ + do { + if (! --try) + close_delete_and_die("too many redirections"); + + /* + * Open socket to http server + */ + if (sfp) fclose(sfp); + sfp = open_socket(server.host, server.port); + + /* + * Send HTTP request. + */ + if (proxy) { + fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.0\r\n", + target.is_ftp ? "f" : "ht", target.host, + target.port, target.path); + } else { + fprintf(sfp, "GET /%s HTTP/1.0\r\n", target.path); + } + + fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host); + +#ifdef BB_FEATURE_WGET_AUTHENTICATION + if (target.user) { + fprintf(sfp, "Authorization: Basic %s\r\n", + base64enc(target.user, buf, sizeof(buf))); + } + if (proxy && server.user) { + fprintf(sfp, "Proxy-Authorization: Basic %s\r\n", + base64enc(server.user, buf, sizeof(buf))); + } +#endif + + 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_delete_and_die("no response from server"); + + for (s = buf ; *s != '\0' && !isspace(*s) ; ++s) + ; + for ( ; isspace(*s) ; ++s) + ; + switch (status = atoi(s)) { + case 0: + case 200: + if (do_continue && output != stdout) + output = freopen(fname_out, "w", output); + do_continue = 0; + break; + case 300: /* redirection */ + case 301: + case 302: + case 303: + break; + case 206: + if (do_continue) + break; + /*FALLTHRU*/ + default: + chomp(buf); + close_delete_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_delete_and_die("server wants to do %s transfer encoding", s); + + if (strcasecmp(buf, "location") == 0) { + if (s[0] == '/') + target.path = xstrdup(s+1); + else { + parse_url(xstrdup(s), &target); + if (!proxy) { + server.host = target.host; + server.port = target.port; + } + } + } + } + } while(status >= 300); + + dfp = sfp; } - - /* - * Retrieve HTTP headers. - */ - while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) { - if (strcmp(buf, "content-length") == 0) { - clen = atol(s); + else + { + /* + * FTP session + */ + if (! target.user) + target.user = xstrdup("anonymous:busybox@"); + + sfp = open_socket(server.host, server.port); + if (ftpcmd(NULL, NULL, sfp, buf) != 220) + close_delete_and_die("%s", buf+4); + + /* + * Splitting username:password pair, + * trying to log in + */ + s = strchr(target.user, ':'); + if (s) + *(s++) = '\0'; + switch(ftpcmd("USER ", target.user, sfp, buf)) { + case 230: + break; + case 331: + if (ftpcmd("PASS ", s, sfp, buf) == 230) + break; + /* FALLTHRU (failed login) */ + default: + close_delete_and_die("ftp login: %s", buf+4); + } + + ftpcmd("CDUP", NULL, sfp, buf); + ftpcmd("TYPE I", NULL, sfp, buf); + + /* + * Querying file size + */ + if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) { + filesize = atol(buf+4); got_clen = 1; - continue; } - if (strcmp(buf, "transfer-encoding") == 0) { - fatalError("wget: i do not do transfer encodings, server wants to do: %s\n", s); - continue; + + /* + * Entering passive mode + */ + if (ftpcmd("PASV", NULL, sfp, buf) != 227) + close_delete_and_die("PASV: %s", buf+4); + s = strrchr(buf, ','); + *s = 0; + port = atoi(s+1); + s = strrchr(buf, ','); + port += atoi(s+1) * 256; + dfp = open_socket(server.host, port); + + if (do_continue) { + sprintf(buf, "REST %ld", beg_range); + if (ftpcmd(buf, NULL, sfp, buf) != 350) { + if (output != stdout) + output = freopen(fname_out, "w", output); + do_continue = 0; + } else + filesize -= beg_range; } + + if (ftpcmd("RETR /", target.path, sfp, buf) > 150) + close_delete_and_die("RETR: %s", buf+4); + } + /* - * Retrieve HTTP body. + * Retrieve file */ - while (clen > 0 && (n = fread(buf, 1, sizeof(buf), sfp)) > 0) { - fwrite(buf, 1, n, stdout); +#ifdef BB_FEATURE_WGET_STATUSBAR + statbytes=0; + if (quiet_flag==FALSE) + progressmeter(-1); +#endif + while ((filesize > 0 || !got_clen) && (n = fread(buf, 1, sizeof(buf), dfp)) > 0) { + fwrite(buf, 1, n, output); +#ifdef BB_FEATURE_WGET_STATUSBAR + statbytes+=n; + if (quiet_flag==FALSE) + progressmeter(1); +#endif if (got_clen) - clen -= n; + filesize -= n; } - if (n == 0 && ferror(sfp)) - fatalError("wget: network read error: %s", strerror(errno)); - - exit(0); -} + if (n == 0 && ferror(dfp)) + perror_msg_and_die("network read error"); -void parse_url(char *url, char **uri_host, int *uri_port, char **uri_path) -{ - char *s, *h; + if (!proxy && target.is_ftp) { + fclose(dfp); + if (ftpcmd(NULL, NULL, sfp, buf) != 226) + error_msg_and_die("ftp error: %s", buf+4); + ftpcmd("QUIT", NULL, sfp, buf); + } - *uri_port = 80; + exit(EXIT_SUCCESS); +} - if (strncmp(url, "http://", 7) != 0) - fatalError("wget: not an http url: %s\n", url); - /* pull the host portion to the front of the buffer */ - for (s = url, h = url+7 ; *h != '/' ; ++h) { - if (*h == '\0') - fatalError("wget: cannot parse url: %s\n", url); - if (*h == ':') { - *uri_port = atoi(h+1); - *h = '\0'; - } - *s++ = *h; +void parse_url(char *url, struct host_info *h) +{ + char *cp, *sp, *up; + + if (strncmp(url, "http://", 7) == 0) { + h->port = 80; + h->host = url + 7; + h->is_ftp = 0; + } else if (strncmp(url, "ftp://", 6) == 0) { + h->port = 21; + h->host = url + 6; + h->is_ftp = 1; + } else + error_msg_and_die("not an http or ftp url: %s", url); + + sp = strchr(h->host, '/'); + if (sp != NULL) { + *sp++ = '\0'; + h->path = sp; + } else + h->path = ""; + + up = strrchr(h->host, '@'); + if (up != NULL) { + h->user = h->host; + *up++ = '\0'; + h->host = up; + } else + h->user = NULL; + + cp = strchr(h->host, ':'); + if (cp != NULL) { + *cp++ = '\0'; + h->port = atoi(cp); } - *s = '\0'; - *uri_host = url; - *uri_path = h; + } FILE *open_socket(char *host, int port) { - struct sockaddr_in sin; + struct sockaddr_in s_in; struct hostent *hp; int fd; FILE *fp; - memzero(&sin, sizeof(sin)); - sin.sin_family = AF_INET; + memset(&s_in, 0, sizeof(s_in)); + s_in.sin_family = AF_INET; if ((hp = (struct hostent *) gethostbyname(host)) == NULL) - fatalError("wget: cannot resolve %s\n", host); - memcpy(&sin.sin_addr, hp->h_addr_list[0], hp->h_length); - sin.sin_port = htons(port); + 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) - fatalError("wget: socket(): %s\n", strerror(errno)); - if (connect(fd, (struct sockaddr *) &sin, sizeof(sin)) < 0) - fatalError("wget: connect(%s): %s\n", host, strerror(errno)); + 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) - fatalError("wget: fdopen(): %s\n", strerror(errno)); + perror_msg_and_die("fdopen()"); return fp; } @@ -235,7 +506,7 @@ char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc) /* verify we are at the end of the header name */ if (*s != ':') - fatalError("wget: bad header line: %s\n", buf); + error_msg_and_die("bad header line: %s", buf); /* locate the start of the header value */ for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s) @@ -259,6 +530,200 @@ char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc) 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; + 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. + * + * 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 1.31 2001/04/05 21:45:53 andersen Exp $ + */ + + + /* Local Variables: c-file-style: "linux" @@ -266,3 +731,6 @@ c-basic-offset: 4 tab-width: 4 End: */ + + +