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811 lines
21 KiB
C
811 lines
21 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 <getopt.h> /* for struct option */
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#include "libbb.h"
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struct host_info {
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// May be used if we ever will want to free() all xstrdup()s...
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/* char *allocated; */
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const char *path;
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const char *user;
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char *host;
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int port;
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smallint is_ftp;
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};
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/* Globals (can be accessed from signal handlers) */
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struct globals {
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off_t content_len; /* Content-length of the file */
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off_t beg_range; /* Range at which continue begins */
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#if ENABLE_FEATURE_WGET_STATUSBAR
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off_t lastsize;
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off_t totalsize;
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off_t transferred; /* Number of bytes transferred so far */
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const char *curfile; /* Name of current file being transferred */
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unsigned lastupdate_sec;
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unsigned start_sec;
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#endif
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smallint chunked; /* chunked transfer encoding */
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};
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#define G (*(struct globals*)&bb_common_bufsiz1)
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struct BUG_G_too_big {
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char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
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};
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#define content_len (G.content_len )
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#define beg_range (G.beg_range )
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#define lastsize (G.lastsize )
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#define totalsize (G.totalsize )
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#define transferred (G.transferred )
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#define curfile (G.curfile )
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#define lastupdate_sec (G.lastupdate_sec )
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#define start_sec (G.start_sec )
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#define chunked (G.chunked )
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#define INIT_G() do { } while (0)
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#if ENABLE_FEATURE_WGET_STATUSBAR
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enum {
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STALLTIME = 5 /* Seconds when xfer considered "stalled" */
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};
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static int getttywidth(void)
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{
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int width;
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get_terminal_width_height(0, &width, NULL);
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return width;
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}
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static void progressmeter(int flag)
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{
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/* We can be called from signal handler */
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int save_errno = errno;
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off_t abbrevsize;
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unsigned since_last_update, elapsed;
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unsigned ratio;
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int barlength, i;
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if (flag == -1) { /* first call to progressmeter */
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start_sec = monotonic_sec();
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lastupdate_sec = start_sec;
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lastsize = 0;
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totalsize = content_len + beg_range; /* as content_len changes.. */
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}
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ratio = 100;
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if (totalsize != 0 && !chunked) {
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/* long long helps to have it working even if !LFS */
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ratio = (unsigned) (100ULL * (transferred+beg_range) / totalsize);
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if (ratio > 100) ratio = 100;
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}
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fprintf(stderr, "\r%-20.20s%4d%% ", curfile, ratio);
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barlength = getttywidth() - 49;
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if (barlength > 0) {
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/* god bless gcc for variable arrays :) */
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i = barlength * ratio / 100;
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{
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char buf[i+1];
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memset(buf, '*', i);
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buf[i] = '\0';
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fprintf(stderr, "|%s%*s|", buf, barlength - i, "");
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}
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}
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i = 0;
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abbrevsize = transferred + beg_range;
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while (abbrevsize >= 100000) {
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i++;
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abbrevsize >>= 10;
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}
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/* see http://en.wikipedia.org/wiki/Tera */
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fprintf(stderr, "%6d%c ", (int)abbrevsize, " kMGTPEZY"[i]);
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// Nuts! Ain't it easier to update progress meter ONLY when we transferred++?
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elapsed = monotonic_sec();
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since_last_update = elapsed - lastupdate_sec;
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if (transferred > lastsize) {
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lastupdate_sec = elapsed;
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lastsize = transferred;
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if (since_last_update >= STALLTIME) {
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/* We "cut off" these seconds from elapsed time
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* by adjusting start time */
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start_sec += since_last_update;
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}
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since_last_update = 0; /* we are un-stalled now */
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}
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elapsed -= start_sec; /* now it's "elapsed since start" */
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if (since_last_update >= STALLTIME) {
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fprintf(stderr, " - stalled -");
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} else {
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off_t to_download = totalsize - beg_range;
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if (transferred <= 0 || (int)elapsed <= 0 || transferred > to_download || chunked) {
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fprintf(stderr, "--:--:-- ETA");
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} else {
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/* to_download / (transferred/elapsed) - elapsed: */
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int eta = (int) ((unsigned long long)to_download*elapsed/transferred - elapsed);
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/* (long long helps to have working ETA even if !LFS) */
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i = eta % 3600;
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fprintf(stderr, "%02d:%02d:%02d ETA", eta / 3600, i / 60, i % 60);
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}
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}
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if (flag == 0) {
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/* last call to progressmeter */
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alarm(0);
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transferred = 0;
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fputc('\n', stderr);
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} else {
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if (flag == -1) {
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/* first call to progressmeter */
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struct sigaction sa;
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sa.sa_handler = progressmeter;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_RESTART;
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sigaction(SIGALRM, &sa, NULL);
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}
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alarm(1);
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}
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errno = save_errno;
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}
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/* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
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* much of which was blatantly stolen from openssh. */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
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* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
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*
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#else /* FEATURE_WGET_STATUSBAR */
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static ALWAYS_INLINE void progressmeter(int flag) { }
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#endif
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/* Read NMEMB bytes into PTR from STREAM. Returns the number of bytes read,
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* and a short count if an eof or non-interrupt error is encountered. */
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static size_t safe_fread(void *ptr, size_t nmemb, FILE *stream)
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{
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size_t ret;
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char *p = (char*)ptr;
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do {
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clearerr(stream);
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ret = fread(p, 1, nmemb, stream);
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p += ret;
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nmemb -= ret;
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} while (nmemb && ferror(stream) && errno == EINTR);
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return p - (char*)ptr;
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}
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/* Read a line or SIZE-1 bytes into S, whichever is less, from STREAM.
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* Returns S, or NULL if an eof or non-interrupt error is encountered. */
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static char *safe_fgets(char *s, int size, FILE *stream)
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{
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char *ret;
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do {
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clearerr(stream);
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ret = fgets(s, size, stream);
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} while (ret == NULL && ferror(stream) && errno == EINTR);
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return ret;
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}
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#if ENABLE_FEATURE_WGET_AUTHENTICATION
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/* Base64-encode character string. buf is assumed to be char buf[512]. */
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static char *base64enc_512(char buf[512], const char *str)
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{
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unsigned len = strlen(str);
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if (len > 512/4*3 - 10) /* paranoia */
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len = 512/4*3 - 10;
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bb_uuencode(buf, str, len, bb_uuenc_tbl_base64);
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return buf;
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}
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#endif
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static FILE *open_socket(len_and_sockaddr *lsa)
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{
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FILE *fp;
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/* glibc 2.4 seems to try seeking on it - ??! */
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/* hopefully it understands what ESPIPE means... */
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fp = fdopen(xconnect_stream(lsa), "r+");
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if (fp == NULL)
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bb_perror_msg_and_die("fdopen");
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return fp;
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}
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static int ftpcmd(const char *s1, const char *s2, FILE *fp, char *buf)
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{
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int result;
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if (s1) {
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if (!s2) s2 = "";
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fprintf(fp, "%s%s\r\n", s1, s2);
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fflush(fp);
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}
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do {
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char *buf_ptr;
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if (fgets(buf, 510, fp) == NULL) {
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bb_perror_msg_and_die("error getting response");
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}
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buf_ptr = strstr(buf, "\r\n");
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if (buf_ptr) {
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*buf_ptr = '\0';
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}
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} while (!isdigit(buf[0]) || buf[3] != ' ');
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buf[3] = '\0';
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result = xatoi_u(buf);
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buf[3] = ' ';
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return result;
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}
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static void parse_url(char *src_url, struct host_info *h)
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{
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char *url, *p, *sp;
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/* h->allocated = */ url = xstrdup(src_url);
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if (strncmp(url, "http://", 7) == 0) {
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h->port = bb_lookup_port("http", "tcp", 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 = bb_lookup_port("ftp", "tcp", 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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bb_error_msg_and_die("not an http or ftp url: %s", url);
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// FYI:
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// "Real" wget 'http://busybox.net?var=a/b' sends this request:
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// 'GET /?var=a/b HTTP 1.0'
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// and saves 'index.html?var=a%2Fb' (we save 'b')
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// wget 'http://busybox.net?login=john@doe':
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// request: 'GET /?login=john@doe HTTP/1.0'
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// saves: 'index.html?login=john@doe' (we save '?login=john@doe')
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// wget 'http://busybox.net#test/test':
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// request: 'GET / HTTP/1.0'
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// saves: 'index.html' (we save 'test')
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//
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// We also don't add unique .N suffix if file exists...
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sp = strchr(h->host, '/');
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p = strchr(h->host, '?'); if (!sp || (p && sp > p)) sp = p;
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p = strchr(h->host, '#'); if (!sp || (p && sp > p)) sp = p;
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if (!sp) {
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h->path = "";
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} else if (*sp == '/') {
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*sp = '\0';
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h->path = sp + 1;
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} else { // '#' or '?'
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// http://busybox.net?login=john@doe is a valid URL
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// memmove converts to:
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// http:/busybox.nett?login=john@doe...
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memmove(h->host - 1, h->host, sp - h->host);
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h->host--;
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sp[-1] = '\0';
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h->path = sp;
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}
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sp = strrchr(h->host, '@');
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h->user = NULL;
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if (sp != NULL) {
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h->user = h->host;
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*sp = '\0';
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h->host = sp + 1;
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}
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sp = h->host;
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}
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static 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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continue;
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if (*s == '\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 == '.'; ++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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bb_error_msg_and_die("bad header line: %s", buf);
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/* locate the start of the header value */
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*s++ = '\0';
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hdrval = skip_whitespace(s);
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/* locate the end of header */
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while (*s && *s != '\r' && *s != '\n')
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++s;
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/* end of header found */
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if (*s) {
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*s = '\0';
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return hdrval;
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}
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/* Rats! The buffer isn't big enough to hold the entire header value. */
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while (c = getc(fp), c != EOF && c != '\n')
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continue;
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/* *istrunc = 1; */
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return hdrval;
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}
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int wget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int wget_main(int argc, char **argv)
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{
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char buf[512];
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struct host_info server, target;
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len_and_sockaddr *lsa;
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int status;
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int port;
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int try = 5;
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unsigned opt;
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char *str;
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char *proxy = 0;
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char *dir_prefix = NULL;
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#if ENABLE_FEATURE_WGET_LONG_OPTIONS
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char *extra_headers = NULL;
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llist_t *headers_llist = NULL;
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#endif
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FILE *sfp = NULL; /* socket to web/ftp server */
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FILE *dfp; /* socket to ftp server (data) */
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char *fname_out; /* where to direct output (-O) */
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bool got_clen = 0; /* got content-length: from server */
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int output_fd = -1;
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bool use_proxy = 1; /* Use proxies if env vars are set */
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const char *proxy_flag = "on"; /* Use proxies if env vars are set */
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const char *user_agent = "Wget";/* "User-Agent" header field */
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static const char keywords[] ALIGN1 =
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"content-length\0""transfer-encoding\0""chunked\0""location\0";
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enum {
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KEY_content_length = 1, KEY_transfer_encoding, KEY_chunked, KEY_location
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};
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enum {
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WGET_OPT_CONTINUE = 0x1,
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WGET_OPT_SPIDER = 0x2,
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WGET_OPT_QUIET = 0x4,
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WGET_OPT_OUTNAME = 0x8,
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WGET_OPT_PREFIX = 0x10,
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WGET_OPT_PROXY = 0x20,
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WGET_OPT_USER_AGENT = 0x40,
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WGET_OPT_PASSIVE = 0x80,
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WGET_OPT_HEADER = 0x100,
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};
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#if ENABLE_FEATURE_WGET_LONG_OPTIONS
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static const char wget_longopts[] ALIGN1 =
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/* name, has_arg, val */
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"continue\0" No_argument "c"
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"spider\0" No_argument "s"
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"quiet\0" No_argument "q"
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"output-document\0" Required_argument "O"
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"directory-prefix\0" Required_argument "P"
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"proxy\0" Required_argument "Y"
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"user-agent\0" Required_argument "U"
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"passive-ftp\0" No_argument "\xff"
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"header\0" Required_argument "\xfe"
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;
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#endif
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INIT_G();
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#if ENABLE_FEATURE_WGET_LONG_OPTIONS
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applet_long_options = wget_longopts;
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#endif
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/* server.allocated = target.allocated = NULL; */
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opt_complementary = "-1" USE_FEATURE_WGET_LONG_OPTIONS(":\xfe::");
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opt = getopt32(argv, "csqO:P:Y:U:",
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&fname_out, &dir_prefix,
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&proxy_flag, &user_agent
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USE_FEATURE_WGET_LONG_OPTIONS(, &headers_llist)
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);
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if (strcmp(proxy_flag, "off") == 0) {
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/* Use the proxy if necessary */
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use_proxy = 0;
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}
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#if ENABLE_FEATURE_WGET_LONG_OPTIONS
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if (headers_llist) {
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int size = 1;
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char *cp;
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llist_t *ll = headers_llist;
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while (ll) {
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size += strlen(ll->data) + 2;
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ll = ll->link;
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}
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extra_headers = cp = xmalloc(size);
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while (headers_llist) {
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cp += sprintf(cp, "%s\r\n", headers_llist->data);
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headers_llist = headers_llist->link;
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}
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}
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#endif
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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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/* Use the proxy if necessary */
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if (use_proxy) {
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proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
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if (proxy && *proxy) {
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parse_url(proxy, &server);
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} else {
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use_proxy = 0;
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}
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}
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/* Guess an output filename, if there was no -O FILE */
|
|
if (!(opt & WGET_OPT_OUTNAME)) {
|
|
fname_out = bb_get_last_path_component_nostrip(target.path);
|
|
/* handle "wget http://kernel.org//" */
|
|
if (fname_out[0] == '/' || !fname_out[0])
|
|
fname_out = (char*)"index.html";
|
|
/* -P DIR is considered only if there was no -O FILE */
|
|
if (dir_prefix)
|
|
fname_out = concat_path_file(dir_prefix, fname_out);
|
|
} else {
|
|
if (LONE_DASH(fname_out)) {
|
|
/* -O - */
|
|
output_fd = 1;
|
|
opt &= ~WGET_OPT_CONTINUE;
|
|
}
|
|
}
|
|
#if ENABLE_FEATURE_WGET_STATUSBAR
|
|
curfile = bb_get_last_path_component_nostrip(fname_out);
|
|
#endif
|
|
|
|
/* Impossible?
|
|
if ((opt & WGET_OPT_CONTINUE) && !fname_out)
|
|
bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)"); */
|
|
|
|
/* Determine where to start transfer */
|
|
if (opt & WGET_OPT_CONTINUE) {
|
|
output_fd = open(fname_out, O_WRONLY);
|
|
if (output_fd >= 0) {
|
|
beg_range = xlseek(output_fd, 0, SEEK_END);
|
|
}
|
|
/* File doesn't exist. We do not create file here yet.
|
|
We are not sure it exists on remove side */
|
|
}
|
|
|
|
/* We want to do exactly _one_ DNS lookup, since some
|
|
* sites (i.e. ftp.us.debian.org) use round-robin DNS
|
|
* and we want to connect to only one IP... */
|
|
lsa = xhost2sockaddr(server.host, server.port);
|
|
if (!(opt & WGET_OPT_QUIET)) {
|
|
fprintf(stderr, "Connecting to %s (%s)\n", server.host,
|
|
xmalloc_sockaddr2dotted(&lsa->u.sa));
|
|
/* We leak result of xmalloc_sockaddr2dotted */
|
|
}
|
|
|
|
if (use_proxy || !target.is_ftp) {
|
|
/*
|
|
* HTTP session
|
|
*/
|
|
do {
|
|
got_clen = 0;
|
|
chunked = 0;
|
|
|
|
if (!--try)
|
|
bb_error_msg_and_die("too many redirections");
|
|
|
|
/* Open socket to http server */
|
|
if (sfp) fclose(sfp);
|
|
sfp = open_socket(lsa);
|
|
|
|
/* Send HTTP request. */
|
|
if (use_proxy) {
|
|
fprintf(sfp, "GET %stp://%s/%s HTTP/1.1\r\n",
|
|
target.is_ftp ? "f" : "ht", target.host,
|
|
target.path);
|
|
} else {
|
|
fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
|
|
}
|
|
|
|
fprintf(sfp, "Host: %s\r\nUser-Agent: %s\r\n",
|
|
target.host, user_agent);
|
|
|
|
#if ENABLE_FEATURE_WGET_AUTHENTICATION
|
|
if (target.user) {
|
|
fprintf(sfp, "Proxy-Authorization: Basic %s\r\n"+6,
|
|
base64enc_512(buf, target.user));
|
|
}
|
|
if (use_proxy && server.user) {
|
|
fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
|
|
base64enc_512(buf, server.user));
|
|
}
|
|
#endif
|
|
|
|
if (beg_range)
|
|
fprintf(sfp, "Range: bytes=%"OFF_FMT"d-\r\n", beg_range);
|
|
#if ENABLE_FEATURE_WGET_LONG_OPTIONS
|
|
if (extra_headers)
|
|
fputs(extra_headers, sfp);
|
|
#endif
|
|
fprintf(sfp, "Connection: close\r\n\r\n");
|
|
|
|
/*
|
|
* Retrieve HTTP response line and check for "200" status code.
|
|
*/
|
|
read_response:
|
|
if (fgets(buf, sizeof(buf), sfp) == NULL)
|
|
bb_error_msg_and_die("no response from server");
|
|
|
|
str = buf;
|
|
str = skip_non_whitespace(str);
|
|
str = skip_whitespace(str);
|
|
// FIXME: no error check
|
|
// xatou wouldn't work: "200 OK"
|
|
status = atoi(str);
|
|
switch (status) {
|
|
case 0:
|
|
case 100:
|
|
while (gethdr(buf, sizeof(buf), sfp /*, &n*/) != NULL)
|
|
/* eat all remaining headers */;
|
|
goto read_response;
|
|
case 200:
|
|
break;
|
|
case 300: /* redirection */
|
|
case 301:
|
|
case 302:
|
|
case 303:
|
|
break;
|
|
case 206:
|
|
if (beg_range)
|
|
break;
|
|
/* fall through */
|
|
default:
|
|
/* Show first line only and kill any ESC tricks */
|
|
buf[strcspn(buf, "\n\r\x1b")] = '\0';
|
|
bb_error_msg_and_die("server returned error: %s", buf);
|
|
}
|
|
|
|
/*
|
|
* Retrieve HTTP headers.
|
|
*/
|
|
while ((str = gethdr(buf, sizeof(buf), sfp /*, &n*/)) != NULL) {
|
|
/* gethdr did already convert the "FOO:" string to lowercase */
|
|
smalluint key = index_in_strings(keywords, *&buf) + 1;
|
|
if (key == KEY_content_length) {
|
|
content_len = BB_STRTOOFF(str, NULL, 10);
|
|
if (errno || content_len < 0) {
|
|
bb_error_msg_and_die("content-length %s is garbage", str);
|
|
}
|
|
got_clen = 1;
|
|
continue;
|
|
}
|
|
if (key == KEY_transfer_encoding) {
|
|
if (index_in_strings(keywords, str_tolower(str)) + 1 != KEY_chunked)
|
|
bb_error_msg_and_die("transfer encoding '%s' is not supported", str);
|
|
chunked = got_clen = 1;
|
|
}
|
|
if (key == KEY_location) {
|
|
if (str[0] == '/')
|
|
/* free(target.allocated); */
|
|
target.path = /* target.allocated = */ xstrdup(str+1);
|
|
else {
|
|
parse_url(str, &target);
|
|
if (use_proxy == 0) {
|
|
server.host = target.host;
|
|
server.port = target.port;
|
|
}
|
|
free(lsa);
|
|
lsa = xhost2sockaddr(server.host, server.port);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} while (status >= 300);
|
|
|
|
dfp = sfp;
|
|
|
|
} else {
|
|
|
|
/*
|
|
* FTP session
|
|
*/
|
|
if (!target.user)
|
|
target.user = xstrdup("anonymous:busybox@");
|
|
|
|
sfp = open_socket(lsa);
|
|
if (ftpcmd(NULL, NULL, sfp, buf) != 220)
|
|
bb_error_msg_and_die("%s", buf+4);
|
|
|
|
/*
|
|
* Splitting username:password pair,
|
|
* trying to log in
|
|
*/
|
|
str = strchr(target.user, ':');
|
|
if (str)
|
|
*(str++) = '\0';
|
|
switch (ftpcmd("USER ", target.user, sfp, buf)) {
|
|
case 230:
|
|
break;
|
|
case 331:
|
|
if (ftpcmd("PASS ", str, sfp, buf) == 230)
|
|
break;
|
|
/* fall through (failed login) */
|
|
default:
|
|
bb_error_msg_and_die("ftp login: %s", buf+4);
|
|
}
|
|
|
|
ftpcmd("TYPE I", NULL, sfp, buf);
|
|
|
|
/*
|
|
* Querying file size
|
|
*/
|
|
if (ftpcmd("SIZE ", target.path, sfp, buf) == 213) {
|
|
content_len = BB_STRTOOFF(buf+4, NULL, 10);
|
|
if (errno || content_len < 0) {
|
|
bb_error_msg_and_die("SIZE value is garbage");
|
|
}
|
|
got_clen = 1;
|
|
}
|
|
|
|
/*
|
|
* Entering passive mode
|
|
*/
|
|
if (ftpcmd("PASV", NULL, sfp, buf) != 227) {
|
|
pasv_error:
|
|
bb_error_msg_and_die("bad response to %s: %s", "PASV", buf);
|
|
}
|
|
// Response is "227 garbageN1,N2,N3,N4,P1,P2[)garbage]
|
|
// Server's IP is N1.N2.N3.N4 (we ignore it)
|
|
// Server's port for data connection is P1*256+P2
|
|
str = strrchr(buf, ')');
|
|
if (str) str[0] = '\0';
|
|
str = strrchr(buf, ',');
|
|
if (!str) goto pasv_error;
|
|
port = xatou_range(str+1, 0, 255);
|
|
*str = '\0';
|
|
str = strrchr(buf, ',');
|
|
if (!str) goto pasv_error;
|
|
port += xatou_range(str+1, 0, 255) * 256;
|
|
set_nport(lsa, htons(port));
|
|
dfp = open_socket(lsa);
|
|
|
|
if (beg_range) {
|
|
sprintf(buf, "REST %"OFF_FMT"d", beg_range);
|
|
if (ftpcmd(buf, NULL, sfp, buf) == 350)
|
|
content_len -= beg_range;
|
|
}
|
|
|
|
if (ftpcmd("RETR ", target.path, sfp, buf) > 150)
|
|
bb_error_msg_and_die("bad response to %s: %s", "RETR", buf);
|
|
}
|
|
|
|
if (opt & WGET_OPT_SPIDER) {
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
fclose(sfp);
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Retrieve file
|
|
*/
|
|
|
|
/* Do it before progressmeter (want to have nice error message) */
|
|
if (output_fd < 0) {
|
|
int o_flags = O_WRONLY | O_CREAT | O_TRUNC | O_EXCL;
|
|
/* compat with wget: -O FILE can overwrite */
|
|
if (opt & WGET_OPT_OUTNAME)
|
|
o_flags = O_WRONLY | O_CREAT | O_TRUNC;
|
|
output_fd = xopen(fname_out, o_flags);
|
|
}
|
|
|
|
if (!(opt & WGET_OPT_QUIET))
|
|
progressmeter(-1);
|
|
|
|
if (chunked)
|
|
goto get_clen;
|
|
|
|
/* Loops only if chunked */
|
|
while (1) {
|
|
while (content_len > 0 || !got_clen) {
|
|
int n;
|
|
unsigned rdsz = sizeof(buf);
|
|
|
|
if (content_len < sizeof(buf) && (chunked || got_clen))
|
|
rdsz = (unsigned)content_len;
|
|
n = safe_fread(buf, rdsz, dfp);
|
|
if (n <= 0) {
|
|
if (ferror(dfp)) {
|
|
/* perror will not work: ferror doesn't set errno */
|
|
bb_error_msg_and_die(bb_msg_read_error);
|
|
}
|
|
break;
|
|
}
|
|
xwrite(output_fd, buf, n);
|
|
#if ENABLE_FEATURE_WGET_STATUSBAR
|
|
transferred += n;
|
|
#endif
|
|
if (got_clen)
|
|
content_len -= n;
|
|
}
|
|
|
|
if (!chunked)
|
|
break;
|
|
|
|
safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
|
|
get_clen:
|
|
safe_fgets(buf, sizeof(buf), dfp);
|
|
content_len = STRTOOFF(buf, NULL, 16);
|
|
/* FIXME: error check? */
|
|
if (content_len == 0)
|
|
break; /* all done! */
|
|
}
|
|
|
|
if (!(opt & WGET_OPT_QUIET))
|
|
progressmeter(0);
|
|
|
|
if ((use_proxy == 0) && target.is_ftp) {
|
|
fclose(dfp);
|
|
if (ftpcmd(NULL, NULL, sfp, buf) != 226)
|
|
bb_error_msg_and_die("ftp error: %s", buf+4);
|
|
ftpcmd("QUIT", NULL, sfp, buf);
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|