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wget: make "wget -O FILE URL1 URL2" concatenate output

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Also fixes a few cases where URL1's data (like start pos)
was leaking into URL2

function                                             old     new   delta
wget_main                                           2303    2321     +18
progress_meter                                       140     152     +12
retrieve_file_data                                   397     396      -1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 30/-1)              Total: 29 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-02-15 00:58:36 +01:00
parent 57b4909db9
commit 2384a357f4
1 changed files with 37 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
networking/wget.c
View File

@ -44,6 +44,8 @@ struct globals {
#if ENABLE_FEATURE_WGET_TIMEOUT
unsigned timeout_seconds;
#endif
int output_fd;
int o_flags;
smallint chunked; /* chunked transfer encoding */
smallint got_clen; /* got content-length: from server */
/* Local downloads do benefit from big buffer.
@ -90,8 +92,11 @@ static void progress_meter(int flag)
if (flag == PROGRESS_START)
bb_progress_init(&G.pmt, G.curfile);
bb_progress_update(&G.pmt, G.beg_range, G.transferred,
G.chunked ? 0 : G.beg_range + G.transferred + G.content_len);
bb_progress_update(&G.pmt,
G.beg_range,
G.transferred,
(G.chunked || !G.got_clen) ? 0 : G.beg_range + G.transferred + G.content_len
);
if (flag == PROGRESS_END) {
bb_progress_free(&G.pmt);
@ -430,7 +435,7 @@ static FILE* prepare_ftp_session(FILE **dfpp, struct host_info *target, len_and_
return sfp;
}
static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
static void NOINLINE retrieve_file_data(FILE *dfp)
{
#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
# if ENABLE_FEATURE_WGET_TIMEOUT
@ -516,7 +521,7 @@ static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
break; /* EOF, not error */
}
xwrite(output_fd, G.wget_buf, n);
xwrite(G.output_fd, G.wget_buf, n);
#if ENABLE_FEATURE_WGET_STATUSBAR
G.transferred += n;
@ -547,6 +552,7 @@ static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
/* Draw full bar and free its resources */
G.chunked = 0; /* makes it show 100% even for chunked download */
G.got_clen = 1; /* makes it show 100% even for download of (formerly) unknown size */
progress_meter(PROGRESS_END);
}
@ -554,7 +560,6 @@ static int download_one_url(const char *url)
{
bool use_proxy; /* Use proxies if env vars are set */
int redir_limit;
int output_fd;
len_and_sockaddr *lsa;
FILE *sfp; /* socket to web/ftp server */
FILE *dfp; /* socket to ftp server (data) */
@ -574,11 +579,9 @@ static int download_one_url(const char *url)
use_proxy = (strcmp(G.proxy_flag, "off") != 0);
if (use_proxy) {
proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
if (proxy && proxy[0]) {
use_proxy = (proxy && proxy[0]);
if (use_proxy)
parse_url(proxy, &server);
} else {
use_proxy = 0;
}
}
if (!use_proxy) {
server.port = target.port;
@ -594,7 +597,6 @@ static int download_one_url(const char *url)
strip_ipv6_scope_id(target.host);
/* If there was no -O FILE, guess output filename */
output_fd = -1;
fname_out_alloc = NULL;
if (!(option_mask32 & WGET_OPT_OUTNAME)) {
G.fname_out = bb_get_last_path_component_nostrip(target.path);
@ -604,22 +606,17 @@ static int download_one_url(const char *url)
/* -P DIR is considered only if there was no -O FILE */
if (G.dir_prefix)
G.fname_out = fname_out_alloc = concat_path_file(G.dir_prefix, G.fname_out);
} else {
if (LONE_DASH(G.fname_out)) {
/* -O - */
output_fd = 1;
option_mask32 &= ~WGET_OPT_CONTINUE;
}
}
#if ENABLE_FEATURE_WGET_STATUSBAR
G.curfile = bb_get_last_path_component_nostrip(G.fname_out);
#endif
/* Determine where to start transfer */
G.beg_range = 0;
if (option_mask32 & WGET_OPT_CONTINUE) {
output_fd = open(G.fname_out, O_WRONLY);
if (output_fd >= 0) {
G.beg_range = xlseek(output_fd, 0, SEEK_END);
G.output_fd = open(G.fname_out, O_WRONLY);
if (G.output_fd >= 0) {
G.beg_range = xlseek(G.output_fd, 0, SEEK_END);
}
/* File doesn't exist. We do not create file here yet.
* We are not sure it exists on remote side */
@ -634,7 +631,9 @@ static int download_one_url(const char *url)
free(s);
}
establish_session:
G.chunked = G.got_clen = 0;
/*G.content_len = 0; - redundant, got_clen = 0 is enough */
G.got_clen = 0;
G.chunked = 0;
if (use_proxy || !target.is_ftp) {
/*
* HTTP session
@ -833,15 +832,13 @@ However, in real world it was observed that some web servers
free(lsa);
if (!(option_mask32 & WGET_OPT_SPIDER)) {
if (output_fd < 0) {
int o_flags = O_WRONLY | O_CREAT | O_TRUNC | O_EXCL;
/* compat with wget: -O FILE can overwrite */
if (option_mask32 & WGET_OPT_OUTNAME)
o_flags = O_WRONLY | O_CREAT | O_TRUNC;
output_fd = xopen(G.fname_out, o_flags);
if (G.output_fd < 0)
G.output_fd = xopen(G.fname_out, G.o_flags);
retrieve_file_data(dfp);
if (!(option_mask32 & WGET_OPT_OUTNAME)) {
xclose(G.output_fd);
G.output_fd = -1;
}
retrieve_file_data(dfp, output_fd);
xclose(output_fd);
}
if (dfp != sfp) {
@ -929,6 +926,17 @@ int wget_main(int argc UNUSED_PARAM, char **argv)
}
#endif
G.output_fd = -1;
G.o_flags = O_WRONLY | O_CREAT | O_TRUNC | O_EXCL;
if (G.fname_out) { /* -O FILE ? */
if (LONE_DASH(G.fname_out)) { /* -O - ? */
G.output_fd = 1;
option_mask32 &= ~WGET_OPT_CONTINUE;
}
/* compat with wget: -O FILE can overwrite */
G.o_flags = O_WRONLY | O_CREAT | O_TRUNC;
}
exitcode = 0;
while (*argv)
exitcode |= download_one_url(*argv++);