* wget - retrieve a file using HTTP or FTP
*
* Chip Rosenthal Covad Communications <chip@laserlink.net>
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*
+ * Copyright (C) 2010 Bradley M. Kuhn <bkuhn@ebb.org>
+ * Kuhn's copyrights are licensed GPLv2-or-later. File as a whole remains GPLv2.
*/
-#include <stdio.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <ctype.h>
-#include <string.h>
-#include <unistd.h>
-#include <signal.h>
-#include <sys/ioctl.h>
+//config:config WGET
+//config: bool "wget"
+//config: default y
+//config: help
+//config: wget is a utility for non-interactive download of files from HTTP
+//config: and FTP servers.
+//config:
+//config:config FEATURE_WGET_STATUSBAR
+//config: bool "Enable a nifty process meter (+2k)"
+//config: default y
+//config: depends on WGET
+//config: help
+//config: Enable the transfer progress bar for wget transfers.
+//config:
+//config:config FEATURE_WGET_AUTHENTICATION
+//config: bool "Enable HTTP authentication"
+//config: default y
+//config: depends on WGET
+//config: help
+//config: Support authenticated HTTP transfers.
+//config:
+//config:config FEATURE_WGET_LONG_OPTIONS
+//config: bool "Enable long options"
+//config: default y
+//config: depends on WGET && LONG_OPTS
+//config: help
+//config: Support long options for the wget applet.
+//config:
+//config:config FEATURE_WGET_TIMEOUT
+//config: bool "Enable timeout option -T SEC"
+//config: default y
+//config: depends on WGET
+//config: help
+//config: Supports network read and connect timeouts for wget,
+//config: so that wget will give up and timeout, through the -T
+//config: command line option.
+//config:
+//config: Currently only connect and network data read timeout are
+//config: supported (i.e., timeout is not applied to the DNS query). When
+//config: FEATURE_WGET_LONG_OPTIONS is also enabled, the --timeout option
+//config: will work in addition to -T.
+//config:
+//config:config FEATURE_WGET_OPENSSL
+//config: bool "Try to connect to HTTPS using openssl"
+//config: default y
+//config: depends on WGET
+//config: help
+//config: Choose how wget establishes SSL connection for https:// URLs.
+//config:
+//config: Busybox itself contains no SSL code. wget will spawn
+//config: a helper program to talk over HTTPS.
+//config:
+//config: OpenSSL has a simple SSL client for debug purposes.
+//config: If you select "openssl" helper, wget will effectively run:
+//config: "openssl s_client -quiet -connect hostname:443
+//config: -servername hostname 2>/dev/null" and pipe its data
+//config: through it. -servername is not used if hostname is numeric.
+//config: Note inconvenient API: host resolution is done twice,
+//config: and there is no guarantee openssl's idea of IPv6 address
+//config: format is the same as ours.
+//config: Another problem is that s_client prints debug information
+//config: to stderr, and it needs to be suppressed. This means
+//config: all error messages get suppressed too.
+//config: openssl is also a big binary, often dynamically linked
+//config: against ~15 libraries.
+//config:
+//config:config FEATURE_WGET_SSL_HELPER
+//config: bool "Try to connect to HTTPS using ssl_helper"
+//config: default y
+//config: depends on WGET
+//config: help
+//config: Choose how wget establishes SSL connection for https:// URLs.
+//config:
+//config: Busybox itself contains no SSL code. wget will spawn
+//config: a helper program to talk over HTTPS.
+//config:
+//config: ssl_helper is a tool which can be built statically
+//config: from busybox sources against a small embedded SSL library.
+//config: Please see networking/ssl_helper/README.
+//config: It does not require double host resolution and emits
+//config: error messages to stderr.
+//config:
+//config: Precompiled static binary may be available at
+//config: http://busybox.net/downloads/binaries/
+
+//applet:IF_WGET(APPLET(wget, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_WGET) += wget.o
+
+//usage:#define wget_trivial_usage
+//usage: IF_FEATURE_WGET_LONG_OPTIONS(
+//usage: "[-c|--continue] [--spider] [-q|--quiet] [-O|--output-document FILE]\n"
+//usage: " [--header 'header: value'] [-Y|--proxy on/off] [-P DIR]\n"
+/* Since we ignore these opts, we don't show them in --help */
+/* //usage: " [--no-check-certificate] [--no-cache] [--passive-ftp] [-t TRIES]" */
+/* //usage: " [-nv] [-nc] [-nH] [-np]" */
+//usage: " [-U|--user-agent AGENT]" IF_FEATURE_WGET_TIMEOUT(" [-T SEC]") " URL..."
+//usage: )
+//usage: IF_NOT_FEATURE_WGET_LONG_OPTIONS(
+//usage: "[-cq] [-O FILE] [-Y on/off] [-P DIR] [-U AGENT]"
+//usage: IF_FEATURE_WGET_TIMEOUT(" [-T SEC]") " URL..."
+//usage: )
+//usage:#define wget_full_usage "\n\n"
+//usage: "Retrieve files via HTTP or FTP\n"
+//usage: IF_FEATURE_WGET_LONG_OPTIONS(
+//usage: "\n --spider Spider mode - only check file existence"
+//usage: )
+//usage: "\n -c Continue retrieval of aborted transfer"
+//usage: "\n -q Quiet"
+//usage: "\n -P DIR Save to DIR (default .)"
+//usage: IF_FEATURE_WGET_TIMEOUT(
+//usage: "\n -T SEC Network read timeout is SEC seconds"
+//usage: )
+//usage: "\n -O FILE Save to FILE ('-' for stdout)"
+//usage: "\n -U STR Use STR for User-Agent header"
+//usage: "\n -Y on/off Use proxy"
+
+#include "libbb.h"
+
+#if 0
+# define log_io(...) bb_error_msg(__VA_ARGS__)
+# define SENDFMT(fp, fmt, ...) \
+ do { \
+ log_io("> " fmt, ##__VA_ARGS__); \
+ fprintf(fp, fmt, ##__VA_ARGS__); \
+ } while (0);
+#else
+# define log_io(...) ((void)0)
+# define SENDFMT(fp, fmt, ...) fprintf(fp, fmt, ##__VA_ARGS__)
+#endif
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <getopt.h>
+struct host_info {
+ char *allocated;
+ const char *path;
+ char *user;
+ const char *protocol;
+ char *host;
+ int port;
+};
+static const char P_FTP[] ALIGN1 = "ftp";
+static const char P_HTTP[] ALIGN1 = "http";
+#if ENABLE_FEATURE_WGET_OPENSSL || ENABLE_FEATURE_WGET_SSL_HELPER
+static const char P_HTTPS[] ALIGN1 = "https";
+#endif
-#include "busybox.h"
+#if ENABLE_FEATURE_WGET_LONG_OPTIONS
+/* User-specified headers prevent using our corresponding built-in headers. */
+enum {
+ HDR_HOST = (1<<0),
+ HDR_USER_AGENT = (1<<1),
+ HDR_RANGE = (1<<2),
+ HDR_AUTH = (1<<3) * ENABLE_FEATURE_WGET_AUTHENTICATION,
+ HDR_PROXY_AUTH = (1<<4) * ENABLE_FEATURE_WGET_AUTHENTICATION,
+};
+static const char wget_user_headers[] ALIGN1 =
+ "Host:\0"
+ "User-Agent:\0"
+ "Range:\0"
+# if ENABLE_FEATURE_WGET_AUTHENTICATION
+ "Authorization:\0"
+ "Proxy-Authorization:\0"
+# endif
+ ;
+# define USR_HEADER_HOST (G.user_headers & HDR_HOST)
+# define USR_HEADER_USER_AGENT (G.user_headers & HDR_USER_AGENT)
+# define USR_HEADER_RANGE (G.user_headers & HDR_RANGE)
+# define USR_HEADER_AUTH (G.user_headers & HDR_AUTH)
+# define USR_HEADER_PROXY_AUTH (G.user_headers & HDR_PROXY_AUTH)
+#else /* No long options, no user-headers :( */
+# define USR_HEADER_HOST 0
+# define USR_HEADER_USER_AGENT 0
+# define USR_HEADER_RANGE 0
+# define USR_HEADER_AUTH 0
+# define USR_HEADER_PROXY_AUTH 0
+#endif
-struct host_info {
- char *host;
- int port;
- char *path;
- int is_ftp;
- char *user;
+/* Globals */
+struct globals {
+ off_t content_len; /* Content-length of the file */
+ off_t beg_range; /* Range at which continue begins */
+#if ENABLE_FEATURE_WGET_STATUSBAR
+ off_t transferred; /* Number of bytes transferred so far */
+ const char *curfile; /* Name of current file being transferred */
+ bb_progress_t pmt;
+#endif
+ char *dir_prefix;
+#if ENABLE_FEATURE_WGET_LONG_OPTIONS
+ char *post_data;
+ char *extra_headers;
+ unsigned char user_headers; /* Headers mentioned by the user */
+#endif
+ char *fname_out; /* where to direct output (-O) */
+ const char *proxy_flag; /* Use proxies if env vars are set */
+ const char *user_agent; /* "User-Agent" header field */
+#if ENABLE_FEATURE_WGET_TIMEOUT
+ unsigned timeout_seconds;
+ bool die_if_timed_out;
+#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.
+ * With 512 byte buffer, it was measured to be
+ * an order of magnitude slower than with big one.
+ */
+ uint64_t just_to_align_next_member;
+ char wget_buf[CONFIG_FEATURE_COPYBUF_KB*1024];
+} FIX_ALIASING;
+#define G (*ptr_to_globals)
+#define INIT_G() do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+} while (0)
+#define FINI_G() do { \
+ FREE_PTR_TO_GLOBALS(); \
+} while (0)
+
+
+/* Must match option string! */
+enum {
+ WGET_OPT_CONTINUE = (1 << 0),
+ WGET_OPT_QUIET = (1 << 1),
+ WGET_OPT_OUTNAME = (1 << 2),
+ WGET_OPT_PREFIX = (1 << 3),
+ WGET_OPT_PROXY = (1 << 4),
+ WGET_OPT_USER_AGENT = (1 << 5),
+ WGET_OPT_NETWORK_READ_TIMEOUT = (1 << 6),
+ WGET_OPT_RETRIES = (1 << 7),
+ WGET_OPT_nsomething = (1 << 8),
+ WGET_OPT_HEADER = (1 << 9) * ENABLE_FEATURE_WGET_LONG_OPTIONS,
+ WGET_OPT_POST_DATA = (1 << 10) * ENABLE_FEATURE_WGET_LONG_OPTIONS,
+ WGET_OPT_SPIDER = (1 << 11) * ENABLE_FEATURE_WGET_LONG_OPTIONS,
};
-static void parse_url(char *url, struct host_info *h);
-static FILE *open_socket(struct sockaddr_in *s_in);
-static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
-static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);
-
-/* Globals (can be accessed from signal handlers */
-static off_t filesize = 0; /* content-length of the file */
-static int chunked = 0; /* chunked transfer encoding */
-#ifdef CONFIG_FEATURE_WGET_STATUSBAR
-static void progressmeter(int flag);
-static char *curfile; /* Name of current file being transferred. */
-static struct timeval start; /* Time a transfer started. */
-static volatile unsigned long statbytes = 0; /* Number of bytes transferred so far. */
-/* For progressmeter() -- number of seconds before xfer considered "stalled" */
-static const int STALLTIME = 5;
+enum {
+ PROGRESS_START = -1,
+ PROGRESS_END = 0,
+ PROGRESS_BUMP = 1,
+};
+#if ENABLE_FEATURE_WGET_STATUSBAR
+static void progress_meter(int flag)
+{
+ if (option_mask32 & WGET_OPT_QUIET)
+ return;
+
+ if (flag == PROGRESS_START)
+ bb_progress_init(&G.pmt, G.curfile);
+
+ 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);
+ bb_putchar_stderr('\n');
+ G.transferred = 0;
+ }
+}
+#else
+static ALWAYS_INLINE void progress_meter(int flag UNUSED_PARAM) { }
#endif
-static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
+
+/* IPv6 knows scoped address types i.e. link and site local addresses. Link
+ * local addresses can have a scope identifier to specify the
+ * interface/link an address is valid on (e.g. fe80::1%eth0). This scope
+ * identifier is only valid on a single node.
+ *
+ * RFC 4007 says that the scope identifier MUST NOT be sent across the wire,
+ * unless all nodes agree on the semantic. Apache e.g. regards zone identifiers
+ * in the Host header as invalid requests, see
+ * https://issues.apache.org/bugzilla/show_bug.cgi?id=35122
+ */
+static void strip_ipv6_scope_id(char *host)
{
- if (output != stdout && do_continue==0) {
- fclose(output);
- unlink(fname_out);
+ char *scope, *cp;
+
+ /* bbox wget actually handles IPv6 addresses without [], like
+ * wget "http://::1/xxx", but this is not standard.
+ * To save code, _here_ we do not support it. */
+
+ if (host[0] != '[')
+ return; /* not IPv6 */
+
+ scope = strchr(host, '%');
+ if (!scope)
+ return;
+
+ /* Remove the IPv6 zone identifier from the host address */
+ cp = strchr(host, ']');
+ if (!cp || (cp[1] != ':' && cp[1] != '\0')) {
+ /* malformed address (not "[xx]:nn" or "[xx]") */
+ return;
}
+
+ /* cp points to "]...", scope points to "%eth0]..." */
+ overlapping_strcpy(scope, cp);
}
-/* Read NMEMB elements of SIZE bytes into PTR from STREAM. Returns the
- * number of elements read, and a short count if an eof or non-interrupt
- * error is encountered. */
-static size_t safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
+#if ENABLE_FEATURE_WGET_AUTHENTICATION
+/* Base64-encode character string. */
+static char *base64enc(const char *str)
{
- size_t ret = 0;
+ unsigned len = strlen(str);
+ if (len > sizeof(G.wget_buf)/4*3 - 10) /* paranoia */
+ len = sizeof(G.wget_buf)/4*3 - 10;
+ bb_uuencode(G.wget_buf, str, len, bb_uuenc_tbl_base64);
+ return G.wget_buf;
+}
+#endif
- do {
- clearerr(stream);
- ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream);
- } while (ret < nmemb && ferror(stream) && errno == EINTR);
+static char* sanitize_string(char *s)
+{
+ unsigned char *p = (void *) s;
+ while (*p >= ' ')
+ p++;
+ *p = '\0';
+ return s;
+}
- return ret;
+#if ENABLE_FEATURE_WGET_TIMEOUT
+static void alarm_handler(int sig UNUSED_PARAM)
+{
+ /* This is theoretically unsafe (uses stdio and malloc in signal handler) */
+ if (G.die_if_timed_out)
+ bb_error_msg_and_die("download timed out");
+}
+static void set_alarm(void)
+{
+ if (G.timeout_seconds) {
+ alarm(G.timeout_seconds);
+ G.die_if_timed_out = 1;
+ }
}
+# define clear_alarm() ((void)(G.die_if_timed_out = 0))
+#else
+# define set_alarm() ((void)0)
+# define clear_alarm() ((void)0)
+#endif
-/* Write NMEMB elements of SIZE bytes from PTR to STREAM. Returns the
- * number of elements written, and a short count if an eof or non-interrupt
- * error is encountered. */
-static size_t safe_fwrite(void *ptr, size_t size, size_t nmemb, FILE *stream)
+#if ENABLE_FEATURE_WGET_OPENSSL
+/*
+ * is_ip_address() attempts to verify whether or not a string
+ * contains an IPv4 or IPv6 address (vs. an FQDN). The result
+ * of inet_pton() can be used to determine this.
+ *
+ * TODO add proper error checking when inet_pton() returns -1
+ * (some form of system error has occurred, and errno is set)
+ */
+static int is_ip_address(const char *string)
{
- size_t ret = 0;
+ struct sockaddr_in sa;
- do {
- clearerr(stream);
- ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream);
- } while (ret < nmemb && ferror(stream) && errno == EINTR);
+ int result = inet_pton(AF_INET, string, &(sa.sin_addr));
+# if ENABLE_FEATURE_IPV6
+ if (result == 0) {
+ struct sockaddr_in6 sa6;
+ result = inet_pton(AF_INET6, string, &(sa6.sin6_addr));
+ }
+# endif
+ return (result == 1);
+}
+#endif
- return ret;
+static FILE *open_socket(len_and_sockaddr *lsa)
+{
+ int fd;
+ FILE *fp;
+
+ set_alarm();
+ fd = xconnect_stream(lsa);
+ clear_alarm();
+
+ /* glibc 2.4 seems to try seeking on it - ??! */
+ /* hopefully it understands what ESPIPE means... */
+ fp = fdopen(fd, "r+");
+ if (!fp)
+ bb_perror_msg_and_die(bb_msg_memory_exhausted);
+
+ return fp;
}
-/* Read a line or SIZE - 1 bytes into S, whichever is less, from STREAM.
- * Returns S, or NULL if an eof or non-interrupt error is encountered. */
-static char *safe_fgets(char *s, int size, FILE *stream)
+/* Returns '\n' if it was seen, else '\0'. Trims at first '\r' or '\n' */
+static char fgets_and_trim(FILE *fp)
{
- char *ret;
+ char c;
+ char *buf_ptr;
- do {
- clearerr(stream);
- ret = fgets(s, size, stream);
- } while (ret == NULL && ferror(stream) && errno == EINTR);
+ set_alarm();
+ if (fgets(G.wget_buf, sizeof(G.wget_buf) - 1, fp) == NULL)
+ bb_perror_msg_and_die("error getting response");
+ clear_alarm();
+
+ buf_ptr = strchrnul(G.wget_buf, '\n');
+ c = *buf_ptr;
+ *buf_ptr = '\0';
+ buf_ptr = strchrnul(G.wget_buf, '\r');
+ *buf_ptr = '\0';
+
+ log_io("< %s", G.wget_buf);
- return ret;
+ return c;
}
-#define close_delete_and_die(s...) { \
- close_and_delete_outfile(output, fname_out, do_continue); \
- bb_error_msg_and_die(s); }
+static int ftpcmd(const char *s1, const char *s2, FILE *fp)
+{
+ int result;
+ if (s1) {
+ if (!s2)
+ s2 = "";
+ fprintf(fp, "%s%s\r\n", s1, s2);
+ fflush(fp);
+ log_io("> %s%s", s1, s2);
+ }
+ do {
+ fgets_and_trim(fp);
+ } while (!isdigit(G.wget_buf[0]) || G.wget_buf[3] != ' ');
-#ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
-/*
- * Base64-encode character string
- * oops... isn't something similar in uuencode.c?
- * XXX: It would be better to use already existing code
- */
-static char *base64enc(unsigned char *p, char *buf, int len) {
-
- char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
- "0123456789+/";
- char *s = buf;
-
- while(*p) {
- if (s >= buf+len-4)
- bb_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;
+ G.wget_buf[3] = '\0';
+ result = xatoi_positive(G.wget_buf);
+ G.wget_buf[3] = ' ';
+ return result;
}
+
+static void parse_url(const char *src_url, struct host_info *h)
+{
+ char *url, *p, *sp;
+
+ free(h->allocated);
+ h->allocated = url = xstrdup(src_url);
+
+ h->protocol = P_FTP;
+ p = strstr(url, "://");
+ if (p) {
+ *p = '\0';
+ h->host = p + 3;
+ if (strcmp(url, P_FTP) == 0) {
+ h->port = bb_lookup_port(P_FTP, "tcp", 21);
+ } else
+#if ENABLE_FEATURE_WGET_OPENSSL || ENABLE_FEATURE_WGET_SSL_HELPER
+ if (strcmp(url, P_HTTPS) == 0) {
+ h->port = bb_lookup_port(P_HTTPS, "tcp", 443);
+ h->protocol = P_HTTPS;
+ } else
#endif
+ if (strcmp(url, P_HTTP) == 0) {
+ http:
+ h->port = bb_lookup_port(P_HTTP, "tcp", 80);
+ h->protocol = P_HTTP;
+ } else {
+ *p = ':';
+ bb_error_msg_and_die("not an http or ftp url: %s", sanitize_string(url));
+ }
+ } else {
+ // GNU wget is user-friendly and falls back to http://
+ h->host = url;
+ goto http;
+ }
-#define WGET_OPT_CONTINUE 1
-#define WGET_OPT_QUIET 2
-#define WGET_OPT_PASSIVE 4
-#define WGET_OPT_OUTNAME 8
-#define WGET_OPT_HEADER 16
-#define WGET_OPT_PREFIX 32
-#define WGET_OPT_PROXY 64
-
-static const struct option wget_long_options[] = {
- { "continue", 0, NULL, 'c' },
- { "quiet", 0, NULL, 'q' },
- { "passive-ftp", 0, NULL, 139 },
- { "output-document", 1, NULL, 'O' },
- { "header", 1, NULL, 131 },
- { "directory-prefix",1, NULL, 'P' },
- { "proxy", 1, NULL, 'Y' },
- { 0, 0, 0, 0 }
-};
+ // FYI:
+ // "Real" wget 'http://busybox.net?var=a/b' sends this request:
+ // 'GET /?var=a/b HTTP 1.0'
+ // and saves 'index.html?var=a%2Fb' (we save 'b')
+ // wget 'http://busybox.net?login=john@doe':
+ // request: 'GET /?login=john@doe HTTP/1.0'
+ // saves: 'index.html?login=john@doe' (we save '?login=john@doe')
+ // wget 'http://busybox.net#test/test':
+ // request: 'GET / HTTP/1.0'
+ // saves: 'index.html' (we save 'test')
+ //
+ // We also don't add unique .N suffix if file exists...
+ sp = strchr(h->host, '/');
+ p = strchr(h->host, '?'); if (!sp || (p && sp > p)) sp = p;
+ p = strchr(h->host, '#'); if (!sp || (p && sp > p)) sp = p;
+ if (!sp) {
+ h->path = "";
+ } else if (*sp == '/') {
+ *sp = '\0';
+ h->path = sp + 1;
+ } else { // '#' or '?'
+ // http://busybox.net?login=john@doe is a valid URL
+ // memmove converts to:
+ // http:/busybox.nett?login=john@doe...
+ memmove(h->host - 1, h->host, sp - h->host);
+ h->host--;
+ sp[-1] = '\0';
+ h->path = sp;
+ }
+
+ sp = strrchr(h->host, '@');
+ if (sp != NULL) {
+ // URL-decode "user:password" string before base64-encoding:
+ // wget http://test:my%20pass@example.com should send
+ // Authorization: Basic dGVzdDpteSBwYXNz
+ // which decodes to "test:my pass".
+ // Standard wget and curl do this too.
+ *sp = '\0';
+ free(h->user);
+ h->user = xstrdup(percent_decode_in_place(h->host, /*strict:*/ 0));
+ h->host = sp + 1;
+ }
+ /* else: h->user remains NULL, or as set by original request
+ * before redirect (if we are here after a redirect).
+ */
+}
-int wget_main(int argc, char **argv)
+static char *gethdr(FILE *fp)
{
- int n, try=5, status;
- unsigned long opt;
- int port;
- char *proxy = 0;
- char *dir_prefix=NULL;
- char *s, buf[512];
- struct stat sbuf;
- char extra_headers[1024];
- char *extra_headers_ptr = extra_headers;
- int extra_headers_left = sizeof(extra_headers);
- struct host_info server, target;
- struct sockaddr_in s_in;
- llist_t *headers_llist = NULL;
+ char *s, *hdrval;
+ int c;
- 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 */
- FILE *output; /* socket to web server */
- int quiet_flag = FALSE; /* Be verry, verry quiet... */
- int use_proxy = 1; /* Use proxies if env vars are set */
- char *proxy_flag = "on"; /* Use proxies if env vars are set */
+ /* retrieve header line */
+ c = fgets_and_trim(fp);
- /*
- * Crack command line.
- */
- bb_opt_complementally = "-1:\203::";
- bb_applet_long_options = wget_long_options;
- opt = bb_getopt_ulflags(argc, argv, "cq\213O:\203:P:Y:",
- &fname_out, &headers_llist,
- &dir_prefix, &proxy_flag);
- if (opt & WGET_OPT_CONTINUE) {
- ++do_continue;
- }
- if (opt & WGET_OPT_QUIET) {
- quiet_flag = TRUE;
- }
- if (strcmp(proxy_flag, "off") == 0) {
- /* Use the proxy if necessary. */
- use_proxy = 0;
+ /* end of the headers? */
+ if (G.wget_buf[0] == '\0')
+ return NULL;
+
+ /* convert the header name to lower case */
+ for (s = G.wget_buf; isalnum(*s) || *s == '-' || *s == '.' || *s == '_'; ++s) {
+ /*
+ * No-op for 20-3f and 60-7f. "0-9a-z-." are in these ranges.
+ * 40-5f range ("@A-Z[\]^_") maps to 60-7f.
+ * "A-Z" maps to "a-z".
+ * "@[\]" can't occur in header names.
+ * "^_" maps to "~,DEL" (which is wrong).
+ * "^" was never seen yet, "_" was seen from web.archive.org
+ * (x-archive-orig-x_commoncrawl_Signature: HEXSTRING).
+ */
+ *s |= 0x20;
}
- if (opt & WGET_OPT_HEADER) {
- while (headers_llist) {
- int arglen = strlen(headers_llist->data);
- if (extra_headers_left - arglen - 2 <= 0)
- bb_error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
- strcpy(extra_headers_ptr, headers_llist->data);
- extra_headers_ptr += arglen;
- extra_headers_left -= ( arglen + 2 );
- *extra_headers_ptr++ = '\r';
- *extra_headers_ptr++ = '\n';
- *(extra_headers_ptr + 1) = 0;
- headers_llist = headers_llist->link;
- }
+
+ /* verify we are at the end of the header name */
+ if (*s != ':')
+ bb_error_msg_and_die("bad header line: %s", sanitize_string(G.wget_buf));
+
+ /* locate the start of the header value */
+ *s++ = '\0';
+ hdrval = skip_whitespace(s);
+
+ if (c != '\n') {
+ /* Rats! The buffer isn't big enough to hold the entire header value */
+ while (c = getc(fp), c != EOF && c != '\n')
+ continue;
}
-
- parse_url(argv[optind], &target);
- server.host = target.host;
- server.port = target.port;
+
+ return hdrval;
+}
+
+static void reset_beg_range_to_zero(void)
+{
+ bb_error_msg("restart failed");
+ G.beg_range = 0;
+ xlseek(G.output_fd, 0, SEEK_SET);
+ /* Done at the end instead: */
+ /* ftruncate(G.output_fd, 0); */
+}
+
+static FILE* prepare_ftp_session(FILE **dfpp, struct host_info *target, len_and_sockaddr *lsa)
+{
+ FILE *sfp;
+ char *str;
+ int port;
+
+ if (!target->user)
+ target->user = xstrdup("anonymous:busybox@");
+
+ sfp = open_socket(lsa);
+ if (ftpcmd(NULL, NULL, sfp) != 220)
+ bb_error_msg_and_die("%s", sanitize_string(G.wget_buf + 4));
/*
- * Use the proxy if necessary.
+ * Splitting username:password pair,
+ * trying to log in
*/
- if (use_proxy) {
- proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
- if (proxy && *proxy) {
- parse_url(bb_xstrdup(proxy), &server);
- } else {
- use_proxy = 0;
- }
- }
-
- /* Guess an output filename */
- if (!fname_out) {
- // Dirty hack. Needed because bb_get_last_path_component
- // will destroy trailing / by storing '\0' in last byte!
- if(target.path[strlen(target.path)-1]!='/') {
- fname_out =
-#ifdef CONFIG_FEATURE_WGET_STATUSBAR
- curfile =
-#endif
- bb_get_last_path_component(target.path);
- }
- if (fname_out==NULL || strlen(fname_out)<1) {
- fname_out =
-#ifdef CONFIG_FEATURE_WGET_STATUSBAR
- curfile =
-#endif
- "index.html";
- }
- if (dir_prefix != NULL)
- fname_out = concat_path_file(dir_prefix, fname_out);
-#ifdef CONFIG_FEATURE_WGET_STATUSBAR
- } else {
- curfile = bb_get_last_path_component(fname_out);
-#endif
+ str = strchr(target->user, ':');
+ if (str)
+ *str++ = '\0';
+ switch (ftpcmd("USER ", target->user, sfp)) {
+ case 230:
+ break;
+ case 331:
+ if (ftpcmd("PASS ", str, sfp) == 230)
+ break;
+ /* fall through (failed login) */
+ default:
+ bb_error_msg_and_die("ftp login: %s", sanitize_string(G.wget_buf + 4));
}
- if (do_continue && !fname_out)
- bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
+ ftpcmd("TYPE I", NULL, sfp);
/*
- * Open the output file stream.
+ * Querying file size
*/
- if (strcmp(fname_out, "-") == 0) {
- output = stdout;
- quiet_flag = TRUE;
- } else {
- output = bb_xfopen(fname_out, (do_continue ? "a" : "w"));
+ if (ftpcmd("SIZE ", target->path, sfp) == 213) {
+ G.content_len = BB_STRTOOFF(G.wget_buf + 4, NULL, 10);
+ if (G.content_len < 0 || errno) {
+ bb_error_msg_and_die("SIZE value is garbage");
+ }
+ G.got_clen = 1;
}
/*
- * Determine where to start transfer.
+ * Entering passive mode
*/
- if (do_continue) {
- if (fstat(fileno(output), &sbuf) < 0)
- bb_perror_msg_and_die("fstat()");
- if (sbuf.st_size > 0)
- beg_range = sbuf.st_size;
+ if (ftpcmd("PASV", NULL, sfp) != 227) {
+ pasv_error:
+ bb_error_msg_and_die("bad response to %s: %s", "PASV", sanitize_string(G.wget_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(G.wget_buf, ')');
+ if (str) str[0] = '\0';
+ str = strrchr(G.wget_buf, ',');
+ if (!str) goto pasv_error;
+ port = xatou_range(str+1, 0, 255);
+ *str = '\0';
+ str = strrchr(G.wget_buf, ',');
+ if (!str) goto pasv_error;
+ port += xatou_range(str+1, 0, 255) * 256;
+ set_nport(&lsa->u.sa, htons(port));
+
+ *dfpp = open_socket(lsa);
+
+ if (G.beg_range != 0) {
+ sprintf(G.wget_buf, "REST %"OFF_FMT"u", G.beg_range);
+ if (ftpcmd(G.wget_buf, NULL, sfp) == 350)
+ G.content_len -= G.beg_range;
else
- do_continue = 0;
+ reset_beg_range_to_zero();
}
- /* 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... */
- bb_lookup_host(&s_in, server.host);
- s_in.sin_port = server.port;
- if (quiet_flag==FALSE) {
- fprintf(stdout, "Connecting to %s[%s]:%d\n",
- server.host, inet_ntoa(s_in.sin_addr), ntohs(server.port));
+ if (ftpcmd("RETR ", target->path, sfp) > 150)
+ bb_error_msg_and_die("bad response to %s: %s", "RETR", sanitize_string(G.wget_buf));
+
+ return sfp;
+}
+
+#if ENABLE_FEATURE_WGET_OPENSSL
+static int spawn_https_helper_openssl(const char *host, unsigned port)
+{
+ char *allocated = NULL;
+ char *servername;
+ int sp[2];
+ int pid;
+ IF_FEATURE_WGET_SSL_HELPER(volatile int child_failed = 0;)
+
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, sp) != 0)
+ /* Kernel can have AF_UNIX support disabled */
+ bb_perror_msg_and_die("socketpair");
+
+ if (!strchr(host, ':'))
+ host = allocated = xasprintf("%s:%u", host, port);
+ servername = xstrdup(host);
+ strrchr(servername, ':')[0] = '\0';
+
+ fflush_all();
+ pid = xvfork();
+ if (pid == 0) {
+ /* Child */
+ char *argv[8];
+
+ close(sp[0]);
+ xmove_fd(sp[1], 0);
+ xdup2(0, 1);
+ /*
+ * openssl s_client -quiet -connect www.kernel.org:443 2>/dev/null
+ * It prints some debug stuff on stderr, don't know how to suppress it.
+ * Work around by dev-nulling stderr. We lose all error messages :(
+ */
+ xmove_fd(2, 3);
+ xopen("/dev/null", O_RDWR);
+ memset(&argv, 0, sizeof(argv));
+ argv[0] = (char*)"openssl";
+ argv[1] = (char*)"s_client";
+ argv[2] = (char*)"-quiet";
+ argv[3] = (char*)"-connect";
+ argv[4] = (char*)host;
+ /*
+ * Per RFC 6066 Section 3, the only permitted values in the
+ * TLS server_name (SNI) field are FQDNs (DNS hostnames).
+ * IPv4 and IPv6 addresses, port numbers are not allowed.
+ */
+ if (!is_ip_address(servername)) {
+ argv[5] = (char*)"-servername";
+ argv[6] = (char*)servername;
+ }
+
+ BB_EXECVP(argv[0], argv);
+ xmove_fd(3, 2);
+# if ENABLE_FEATURE_WGET_SSL_HELPER
+ child_failed = 1;
+ xfunc_die();
+# else
+ bb_perror_msg_and_die("can't execute '%s'", argv[0]);
+# endif
+ /* notreached */
+ }
+
+ /* Parent */
+ free(servername);
+ free(allocated);
+ close(sp[1]);
+# if ENABLE_FEATURE_WGET_SSL_HELPER
+ if (child_failed) {
+ close(sp[0]);
+ return -1;
}
+# endif
+ return sp[0];
+}
+#endif
- if (use_proxy || !target.is_ftp) {
+/* See networking/ssl_helper/README how to build one */
+#if ENABLE_FEATURE_WGET_SSL_HELPER
+static void spawn_https_helper_small(int network_fd)
+{
+ int sp[2];
+ int pid;
+
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, sp) != 0)
+ /* Kernel can have AF_UNIX support disabled */
+ bb_perror_msg_and_die("socketpair");
+
+ pid = BB_MMU ? xfork() : xvfork();
+ if (pid == 0) {
+ /* Child */
+ char *argv[3];
+
+ close(sp[0]);
+ xmove_fd(sp[1], 0);
+ xdup2(0, 1);
+ xmove_fd(network_fd, 3);
/*
- * HTTP session
+ * A simple ssl/tls helper
*/
- do {
- got_clen = chunked = 0;
+ argv[0] = (char*)"ssl_helper";
+ argv[1] = (char*)"-d3";
+ argv[2] = NULL;
+ BB_EXECVP(argv[0], argv);
+ bb_perror_msg_and_die("can't execute '%s'", argv[0]);
+ /* notreached */
+ }
+
+ /* Parent */
+ close(sp[1]);
+ xmove_fd(sp[0], network_fd);
+}
+#endif
- if (! --try)
- close_delete_and_die("too many redirections");
+static void NOINLINE retrieve_file_data(FILE *dfp)
+{
+#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
+# if ENABLE_FEATURE_WGET_TIMEOUT
+ unsigned second_cnt = G.timeout_seconds;
+# endif
+ struct pollfd polldata;
+
+ polldata.fd = fileno(dfp);
+ polldata.events = POLLIN | POLLPRI;
+#endif
+ progress_meter(PROGRESS_START);
- /*
- * Open socket to http server
- */
- if (sfp) fclose(sfp);
- sfp = open_socket(&s_in);
+ if (G.chunked)
+ goto get_clen;
+
+ /* Loops only if chunked */
+ while (1) {
- /*
- * Send HTTP request.
+#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
+ /* Must use nonblocking I/O, otherwise fread will loop
+ * and *block* until it reads full buffer,
+ * which messes up progress bar and/or timeout logic.
+ * Because of nonblocking I/O, we need to dance
+ * very carefully around EAGAIN. See explanation at
+ * clearerr() calls.
+ */
+ ndelay_on(polldata.fd);
+#endif
+ while (1) {
+ int n;
+ unsigned rdsz;
+
+#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
+ /* fread internally uses read loop, which in our case
+ * is usually exited when we get EAGAIN.
+ * In this case, libc sets error marker on the stream.
+ * Need to clear it before next fread to avoid possible
+ * rare false positive ferror below. Rare because usually
+ * fread gets more than zero bytes, and we don't fall
+ * into if (n <= 0) ...
*/
- if (use_proxy) {
- const char *format = "GET %stp://%s:%d/%s HTTP/1.1\r\n";
-#ifdef CONFIG_FEATURE_WGET_IP6_LITERAL
- if (strchr (target.host, ':'))
- format = "GET %stp://[%s]:%d/%s HTTP/1.1\r\n";
+ clearerr(dfp);
#endif
- fprintf(sfp, format,
- target.is_ftp ? "f" : "ht", target.host,
- ntohs(target.port), target.path);
- } else {
- fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
+ errno = 0;
+ rdsz = sizeof(G.wget_buf);
+ if (G.got_clen) {
+ if (G.content_len < (off_t)sizeof(G.wget_buf)) {
+ if ((int)G.content_len <= 0)
+ break;
+ rdsz = (unsigned)G.content_len;
+ }
}
+ n = fread(G.wget_buf, 1, rdsz, dfp);
- fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
-
-#ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
- if (target.user) {
- fprintf(sfp, "Authorization: Basic %s\r\n",
- base64enc(target.user, buf, sizeof(buf)));
- }
- if (use_proxy && server.user) {
- fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
- base64enc(server.user, buf, sizeof(buf)));
- }
+ if (n > 0) {
+ xwrite(G.output_fd, G.wget_buf, n);
+#if ENABLE_FEATURE_WGET_STATUSBAR
+ G.transferred += n;
#endif
-
- if (do_continue)
- fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
- if(extra_headers_left < sizeof(extra_headers))
- fputs(extra_headers,sfp);
- 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)
- 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 100:
- while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
- goto read_response;
- 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)
+ if (G.got_clen) {
+ G.content_len -= n;
+ if (G.content_len == 0)
break;
- /*FALLTHRU*/
- default:
- chomp(buf);
- close_delete_and_die("server returned error %d: %s", atoi(s), buf);
+ }
+#if ENABLE_FEATURE_WGET_TIMEOUT
+ second_cnt = G.timeout_seconds;
+#endif
+ goto bump;
}
- /*
- * Retrieve HTTP headers.
+ /* n <= 0.
+ * man fread:
+ * If error occurs, or EOF is reached, the return value
+ * is a short item count (or zero).
+ * fread does not distinguish between EOF and error.
*/
- while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
- if (strcasecmp(buf, "content-length") == 0) {
- unsigned long value;
- if (safe_strtoul(s, &value)) {
- close_delete_and_die("content-length %s is garbage", s);
- }
- filesize = value;
- got_clen = 1;
- continue;
- }
- if (strcasecmp(buf, "transfer-encoding") == 0) {
- if (strcasecmp(s, "chunked") == 0) {
- chunked = got_clen = 1;
- } else {
- close_delete_and_die("server wants to do %s transfer encoding", s);
- }
+ if (errno != EAGAIN) {
+ if (ferror(dfp)) {
+ progress_meter(PROGRESS_END);
+ bb_perror_msg_and_die(bb_msg_read_error);
}
- if (strcasecmp(buf, "location") == 0) {
- if (s[0] == '/')
- target.path = bb_xstrdup(s+1);
- else {
- parse_url(bb_xstrdup(s), &target);
- if (use_proxy == 0) {
- server.host = target.host;
- server.port = target.port;
- }
- bb_lookup_host(&s_in, server.host);
- s_in.sin_port = server.port;
- break;
- }
+ break; /* EOF, not error */
+ }
+
+#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
+ /* It was EAGAIN. There is no data. Wait up to one second
+ * then abort if timed out, or update the bar and try reading again.
+ */
+ if (safe_poll(&polldata, 1, 1000) == 0) {
+# if ENABLE_FEATURE_WGET_TIMEOUT
+ if (second_cnt != 0 && --second_cnt == 0) {
+ progress_meter(PROGRESS_END);
+ bb_error_msg_and_die("download timed out");
}
+# endif
+ /* We used to loop back to poll here,
+ * but there is no great harm in letting fread
+ * to try reading anyway.
+ */
}
- } while(status >= 300);
+#endif
+ bump:
+ /* Need to do it _every_ second for "stalled" indicator
+ * to be shown properly.
+ */
+ progress_meter(PROGRESS_BUMP);
+ } /* while (reading data) */
- dfp = sfp;
- }
- else
- {
+#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
+ clearerr(dfp);
+ ndelay_off(polldata.fd); /* else fgets can get very unhappy */
+#endif
+ if (!G.chunked)
+ break;
+
+ fgets_and_trim(dfp); /* Eat empty line */
+ get_clen:
+ fgets_and_trim(dfp);
+ G.content_len = STRTOOFF(G.wget_buf, NULL, 16);
+ /* FIXME: error check? */
+ if (G.content_len == 0)
+ break; /* all done! */
+ G.got_clen = 1;
/*
- * FTP session
+ * Note that fgets may result in some data being buffered in dfp.
+ * We loop back to fread, which will retrieve this data.
+ * Also note that code has to be arranged so that fread
+ * is done _before_ one-second poll wait - poll doesn't know
+ * about stdio buffering and can result in spurious one second waits!
*/
- if (! target.user)
- target.user = bb_xstrdup("anonymous:busybox@");
+ }
- sfp = open_socket(&s_in);
- if (ftpcmd(NULL, NULL, sfp, buf) != 220)
- close_delete_and_die("%s", buf+4);
+ /* If -c failed, we restart from the beginning,
+ * but we do not truncate file then, we do it only now, at the end.
+ * This lets user to ^C if his 99% complete 10 GB file download
+ * failed to restart *without* losing the almost complete file.
+ */
+ {
+ off_t pos = lseek(G.output_fd, 0, SEEK_CUR);
+ if (pos != (off_t)-1)
+ ftruncate(G.output_fd, pos);
+ }
- /*
- * 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);
+ /* 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);
+}
+
+static void download_one_url(const char *url)
+{
+ bool use_proxy; /* Use proxies if env vars are set */
+ int redir_limit;
+ len_and_sockaddr *lsa;
+ FILE *sfp; /* socket to web/ftp server */
+ FILE *dfp; /* socket to ftp server (data) */
+ char *proxy = NULL;
+ char *fname_out_alloc;
+ char *redirected_path = NULL;
+ struct host_info server;
+ struct host_info target;
+
+ server.allocated = NULL;
+ target.allocated = NULL;
+ server.user = NULL;
+ target.user = NULL;
+
+ parse_url(url, &target);
+
+ /* Use the proxy if necessary */
+ use_proxy = (strcmp(G.proxy_flag, "off") != 0);
+ if (use_proxy) {
+ proxy = getenv(target.protocol == P_FTP ? "ftp_proxy" : "http_proxy");
+//FIXME: what if protocol is https? Ok to use http_proxy?
+ use_proxy = (proxy && proxy[0]);
+ if (use_proxy)
+ parse_url(proxy, &server);
+ }
+ if (!use_proxy) {
+ server.port = target.port;
+ if (ENABLE_FEATURE_IPV6) {
+ //free(server.allocated); - can't be non-NULL
+ server.host = server.allocated = xstrdup(target.host);
+ } else {
+ server.host = target.host;
}
+ }
- ftpcmd("CDUP", NULL, sfp, buf);
- ftpcmd("TYPE I", NULL, sfp, buf);
+ if (ENABLE_FEATURE_IPV6)
+ strip_ipv6_scope_id(target.host);
+
+ /* If there was no -O FILE, guess output filename */
+ fname_out_alloc = NULL;
+ if (!(option_mask32 & WGET_OPT_OUTNAME)) {
+ G.fname_out = bb_get_last_path_component_nostrip(target.path);
+ /* handle "wget http://kernel.org//" */
+ if (G.fname_out[0] == '/' || !G.fname_out[0])
+ G.fname_out = (char*)"index.html";
+ /* -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 {
+ /* redirects may free target.path later, need to make a copy */
+ G.fname_out = fname_out_alloc = xstrdup(G.fname_out);
+ }
+ }
+#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) {
+ 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 */
+ }
+
+ redir_limit = 5;
+ resolve_lsa:
+ lsa = xhost2sockaddr(server.host, server.port);
+ if (!(option_mask32 & WGET_OPT_QUIET)) {
+ char *s = xmalloc_sockaddr2dotted(&lsa->u.sa);
+ fprintf(stderr, "Connecting to %s (%s)\n", server.host, s);
+ free(s);
+ }
+ establish_session:
+ /*G.content_len = 0; - redundant, got_clen = 0 is enough */
+ G.got_clen = 0;
+ G.chunked = 0;
+ if (use_proxy || target.protocol != P_FTP) {
/*
- * Querying file size
+ * HTTP session
*/
- if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
- unsigned long value;
- if (safe_strtoul(buf+4, &value)) {
- close_delete_and_die("SIZE value is garbage");
+ char *str;
+ int status;
+
+ /* Open socket to http(s) server */
+#if ENABLE_FEATURE_WGET_OPENSSL
+ /* openssl (and maybe ssl_helper) support is configured */
+ if (target.protocol == P_HTTPS) {
+ /* openssl-based helper
+ * Inconvenient API since we can't give it an open fd
+ */
+ int fd = spawn_https_helper_openssl(server.host, server.port);
+# if ENABLE_FEATURE_WGET_SSL_HELPER
+ if (fd < 0) { /* no openssl? try ssl_helper */
+ sfp = open_socket(lsa);
+ spawn_https_helper_small(fileno(sfp));
+ goto socket_opened;
}
- filesize = value;
- got_clen = 1;
+# else
+ /* We don't check for exec("openssl") failure in this case */
+# endif
+ sfp = fdopen(fd, "r+");
+ if (!sfp)
+ bb_perror_msg_and_die(bb_msg_memory_exhausted);
+ goto socket_opened;
+ }
+ sfp = open_socket(lsa);
+ socket_opened:
+#elif ENABLE_FEATURE_WGET_SSL_HELPER
+ /* Only ssl_helper support is configured */
+ sfp = open_socket(lsa);
+ if (target.protocol == P_HTTPS)
+ spawn_https_helper_small(fileno(sfp));
+#else
+ /* ssl (https) support is not configured */
+ sfp = open_socket(lsa);
+#endif
+ /* Send HTTP request */
+ if (use_proxy) {
+ SENDFMT(sfp, "GET %s://%s/%s HTTP/1.1\r\n",
+ target.protocol, target.host,
+ target.path);
+ } else {
+ SENDFMT(sfp, "%s /%s HTTP/1.1\r\n",
+ (option_mask32 & WGET_OPT_POST_DATA) ? "POST" : "GET",
+ target.path);
}
+ if (!USR_HEADER_HOST)
+ SENDFMT(sfp, "Host: %s\r\n", target.host);
+ if (!USR_HEADER_USER_AGENT)
+ SENDFMT(sfp, "User-Agent: %s\r\n", G.user_agent);
- /*
- * Entering passive mode
+ /* Ask server to close the connection as soon as we are done
+ * (IOW: we do not intend to send more requests)
*/
- 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;
- s_in.sin_port = htons(port);
- dfp = open_socket(&s_in);
-
- 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;
- }
+ SENDFMT(sfp, "Connection: close\r\n");
- if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
- close_delete_and_die("RETR: %s", buf+4);
+#if ENABLE_FEATURE_WGET_AUTHENTICATION
+ if (target.user && !USR_HEADER_AUTH) {
+ SENDFMT(sfp, "Proxy-Authorization: Basic %s\r\n"+6,
+ base64enc(target.user));
+ }
+ if (use_proxy && server.user && !USR_HEADER_PROXY_AUTH) {
+ SENDFMT(sfp, "Proxy-Authorization: Basic %s\r\n",
+ base64enc(server.user));
+ }
+#endif
- }
+ if (G.beg_range != 0 && !USR_HEADER_RANGE)
+ SENDFMT(sfp, "Range: bytes=%"OFF_FMT"u-\r\n", G.beg_range);
+#if ENABLE_FEATURE_WGET_LONG_OPTIONS
+ if (G.extra_headers) {
+ log_io(G.extra_headers);
+ fputs(G.extra_headers, sfp);
+ }
- /*
- * Retrieve file
- */
- if (chunked) {
- fgets(buf, sizeof(buf), dfp);
- filesize = strtol(buf, (char **) NULL, 16);
- }
-#ifdef CONFIG_FEATURE_WGET_STATUSBAR
- if (quiet_flag==FALSE)
- progressmeter(-1);
+ if (option_mask32 & WGET_OPT_POST_DATA) {
+ SENDFMT(sfp,
+ "Content-Type: application/x-www-form-urlencoded\r\n"
+ "Content-Length: %u\r\n"
+ "\r\n"
+ "%s",
+ (int) strlen(G.post_data), G.post_data
+ );
+ } else
#endif
- do {
- while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, ((chunked || got_clen) && (filesize < sizeof(buf)) ? filesize : sizeof(buf)), dfp)) > 0) {
- if (safe_fwrite(buf, 1, n, output) != n) {
- bb_perror_msg_and_die("write error");
- }
-#ifdef CONFIG_FEATURE_WGET_STATUSBAR
- statbytes+=n;
-#endif
- if (got_clen) {
- filesize -= n;
- }
+ {
+ SENDFMT(sfp, "\r\n");
}
- if (chunked) {
- safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
- safe_fgets(buf, sizeof(buf), dfp);
- filesize = strtol(buf, (char **) NULL, 16);
- if (filesize==0) {
- chunked = 0; /* all done! */
+ fflush(sfp);
+ /* If we use SSL helper, keeping our end of the socket open for writing
+ * makes our end (i.e. the same fd!) readable (EAGAIN instead of EOF)
+ * even after child closes its copy of the fd.
+ * This helps:
+ */
+ shutdown(fileno(sfp), SHUT_WR);
+
+ /*
+ * Retrieve HTTP response line and check for "200" status code.
+ */
+ read_response:
+ fgets_and_trim(sfp);
+
+ str = G.wget_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(sfp) != NULL)
+ /* eat all remaining headers */;
+ goto read_response;
+
+ /* Success responses */
+ case 200:
+ /* fall through */
+ case 201: /* 201 Created */
+/* "The request has been fulfilled and resulted in a new resource being created" */
+ /* Standard wget is reported to treat this as success */
+ /* fall through */
+ case 202: /* 202 Accepted */
+/* "The request has been accepted for processing, but the processing has not been completed" */
+ /* Treat as success: fall through */
+ case 203: /* 203 Non-Authoritative Information */
+/* "Use of this response code is not required and is only appropriate when the response would otherwise be 200 (OK)" */
+ /* fall through */
+ case 204: /* 204 No Content */
+/*
+Response 204 doesn't say "null file", it says "metadata
+has changed but data didn't":
+
+"10.2.5 204 No Content
+The server has fulfilled the request but does not need to return
+an entity-body, and might want to return updated metainformation.
+The response MAY include new or updated metainformation in the form
+of entity-headers, which if present SHOULD be associated with
+the requested variant.
+
+If the client is a user agent, it SHOULD NOT change its document
+view from that which caused the request to be sent. This response
+is primarily intended to allow input for actions to take place
+without causing a change to the user agent's active document view,
+although any new or updated metainformation SHOULD be applied
+to the document currently in the user agent's active view.
+
+The 204 response MUST NOT include a message-body, and thus
+is always terminated by the first empty line after the header fields."
+
+However, in real world it was observed that some web servers
+(e.g. Boa/0.94.14rc21) simply use code 204 when file size is zero.
+*/
+ if (G.beg_range != 0) {
+ /* "Range:..." was not honored by the server.
+ * Restart download from the beginning.
+ */
+ reset_beg_range_to_zero();
}
+ break;
+ /* 205 Reset Content ?? what to do on this ?? */
+
+ case 300: /* redirection */
+ case 301:
+ case 302:
+ case 303:
+ break;
+
+ case 206: /* Partial Content */
+ if (G.beg_range != 0)
+ /* "Range:..." worked. Good. */
+ break;
+ /* Partial Content even though we did not ask for it??? */
+ /* fall through */
+ default:
+ bb_error_msg_and_die("server returned error: %s", sanitize_string(G.wget_buf));
}
- if (n == 0 && ferror(dfp)) {
- bb_perror_msg_and_die("network read error");
+ /*
+ * Retrieve HTTP headers.
+ */
+ while ((str = gethdr(sfp)) != NULL) {
+ static const char keywords[] ALIGN1 =
+ "content-length\0""transfer-encoding\0""location\0";
+ enum {
+ KEY_content_length = 1, KEY_transfer_encoding, KEY_location
+ };
+ smalluint key;
+
+ /* gethdr converted "FOO:" string to lowercase */
+
+ /* strip trailing whitespace */
+ char *s = strchrnul(str, '\0') - 1;
+ while (s >= str && (*s == ' ' || *s == '\t')) {
+ *s = '\0';
+ s--;
+ }
+ key = index_in_strings(keywords, G.wget_buf) + 1;
+ if (key == KEY_content_length) {
+ G.content_len = BB_STRTOOFF(str, NULL, 10);
+ if (G.content_len < 0 || errno) {
+ bb_error_msg_and_die("content-length %s is garbage", sanitize_string(str));
+ }
+ G.got_clen = 1;
+ continue;
+ }
+ if (key == KEY_transfer_encoding) {
+ if (strcmp(str_tolower(str), "chunked") != 0)
+ bb_error_msg_and_die("transfer encoding '%s' is not supported", sanitize_string(str));
+ G.chunked = 1;
+ }
+ if (key == KEY_location && status >= 300) {
+ if (--redir_limit == 0)
+ bb_error_msg_and_die("too many redirections");
+ fclose(sfp);
+ if (str[0] == '/') {
+ free(redirected_path);
+ target.path = redirected_path = xstrdup(str+1);
+ /* lsa stays the same: it's on the same server */
+ } else {
+ parse_url(str, &target);
+ if (!use_proxy) {
+ /* server.user remains untouched */
+ free(server.allocated);
+ server.allocated = NULL;
+ server.host = target.host;
+ /* strip_ipv6_scope_id(target.host); - no! */
+ /* we assume remote never gives us IPv6 addr with scope id */
+ server.port = target.port;
+ free(lsa);
+ goto resolve_lsa;
+ } /* else: lsa stays the same: we use proxy */
+ }
+ goto establish_session;
+ }
}
- } while (chunked);
-#ifdef CONFIG_FEATURE_WGET_STATUSBAR
- if (quiet_flag==FALSE)
- progressmeter(1);
-#endif
- 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);
- }
- exit(EXIT_SUCCESS);
-}
+// if (status >= 300)
+// bb_error_msg_and_die("bad redirection (no Location: header from server)");
+ /* For HTTP, data is pumped over the same connection */
+ dfp = sfp;
+ } else {
+ /*
+ * FTP session
+ */
+ sfp = prepare_ftp_session(&dfp, &target, lsa);
+ }
-void parse_url(char *url, struct host_info *h)
-{
- char *cp, *sp, *up, *pp;
-
- if (strncmp(url, "http://", 7) == 0) {
- h->port = bb_lookup_port("http", "tcp", 80);
- h->host = url + 7;
- h->is_ftp = 0;
- } else if (strncmp(url, "ftp://", 6) == 0) {
- h->port = bb_lookup_port("ftp", "tfp", 21);
- h->host = url + 6;
- h->is_ftp = 1;
- } else
- bb_error_msg_and_die("not an http or ftp url: %s", url);
+ free(lsa);
- sp = strchr(h->host, '/');
- if (sp) {
- *sp++ = '\0';
- h->path = sp;
- } else
- h->path = bb_xstrdup("");
-
- up = strrchr(h->host, '@');
- if (up != NULL) {
- h->user = h->host;
- *up++ = '\0';
- h->host = up;
- } else
- h->user = NULL;
-
- pp = h->host;
-
-#ifdef CONFIG_FEATURE_WGET_IP6_LITERAL
- if (h->host[0] == '[') {
- char *ep;
-
- ep = h->host + 1;
- while (*ep == ':' || isxdigit (*ep))
- ep++;
- if (*ep == ']') {
- h->host++;
- *ep = '\0';
- pp = ep + 1;
+ if (!(option_mask32 & WGET_OPT_SPIDER)) {
+ 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;
}
}
-#endif
- cp = strchr(pp, ':');
- if (cp != NULL) {
- *cp++ = '\0';
- h->port = htons(atoi(cp));
+ if (dfp != sfp) {
+ /* It's ftp. Close data connection properly */
+ fclose(dfp);
+ if (ftpcmd(NULL, NULL, sfp) != 226)
+ bb_error_msg_and_die("ftp error: %s", sanitize_string(G.wget_buf + 4));
+ /* ftpcmd("QUIT", NULL, sfp); - why bother? */
}
+ fclose(sfp);
+
+ free(server.allocated);
+ free(target.allocated);
+ free(server.user);
+ free(target.user);
+ free(fname_out_alloc);
+ free(redirected_path);
}
-
-FILE *open_socket(struct sockaddr_in *s_in)
+int wget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int wget_main(int argc UNUSED_PARAM, char **argv)
{
- FILE *fp;
-
- fp = fdopen(xconnect(s_in), "r+");
- if (fp == NULL)
- bb_perror_msg_and_die("fdopen()");
-
- return fp;
-}
-
-
-char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
-{
- char *s, *hdrval;
- int c;
-
- *istrunc = 0;
-
- /* retrieve header line */
- if (fgets(buf, bufsiz, fp) == NULL)
- return NULL;
-
- /* see if we are at the end of the headers */
- for (s = buf ; *s == '\r' ; ++s)
+#if ENABLE_FEATURE_WGET_LONG_OPTIONS
+ static const char wget_longopts[] ALIGN1 =
+ /* name, has_arg, val */
+ "continue\0" No_argument "c"
+ "quiet\0" No_argument "q"
+ "output-document\0" Required_argument "O"
+ "directory-prefix\0" Required_argument "P"
+ "proxy\0" Required_argument "Y"
+ "user-agent\0" Required_argument "U"
+IF_FEATURE_WGET_TIMEOUT(
+ "timeout\0" Required_argument "T")
+ /* Ignored: */
+IF_DESKTOP( "tries\0" Required_argument "t")
+ "header\0" Required_argument "\xff"
+ "post-data\0" Required_argument "\xfe"
+ "spider\0" No_argument "\xfd"
+ /* Ignored (we always use PASV): */
+IF_DESKTOP( "passive-ftp\0" No_argument "\xf0")
+ /* Ignored (we don't do ssl) */
+IF_DESKTOP( "no-check-certificate\0" No_argument "\xf0")
+ /* Ignored (we don't support caching) */
+IF_DESKTOP( "no-cache\0" No_argument "\xf0")
+IF_DESKTOP( "no-verbose\0" No_argument "\xf0")
+IF_DESKTOP( "no-clobber\0" No_argument "\xf0")
+IF_DESKTOP( "no-host-directories\0" No_argument "\xf0")
+IF_DESKTOP( "no-parent\0" No_argument "\xf0")
;
- if (s[0] == '\n')
- return NULL;
-
- /* convert the header name to lower case */
- for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
- *s = tolower(*s);
-
- /* verify we are at the end of the header name */
- if (*s != ':')
- bb_error_msg_and_die("bad header line: %s", buf);
-
- /* locate the start of the header value */
- for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
- ;
- hdrval = s;
-
- /* locate the end of header */
- while (*s != '\0' && *s != '\r' && *s != '\n')
- ++s;
-
- /* end of header found */
- if (*s != '\0') {
- *s = '\0';
- return hdrval;
- }
+#endif
- /* 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;
-}
+#if ENABLE_FEATURE_WGET_LONG_OPTIONS
+ llist_t *headers_llist = NULL;
+#endif
-static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
-{
- if (s1) {
- if (!s2) s2="";
- fprintf(fp, "%s%s\r\n", s1, s2);
- fflush(fp);
- }
+ INIT_G();
- do {
- char *buf_ptr;
+#if ENABLE_FEATURE_WGET_TIMEOUT
+ G.timeout_seconds = 900;
+ signal(SIGALRM, alarm_handler);
+#endif
+ G.proxy_flag = "on"; /* use proxies if env vars are set */
+ G.user_agent = "Wget"; /* "User-Agent" header field */
- if (fgets(buf, 510, fp) == NULL) {
- bb_perror_msg_and_die("fgets()");
+#if ENABLE_FEATURE_WGET_LONG_OPTIONS
+ applet_long_options = wget_longopts;
+#endif
+ opt_complementary = "-1" /* at least one URL */
+ IF_FEATURE_WGET_LONG_OPTIONS(":\xff::"); /* --header is a list */
+ getopt32(argv, "cqO:P:Y:U:T:+"
+ /*ignored:*/ "t:"
+ /*ignored:*/ "n::"
+ /* wget has exactly four -n<letter> opts, all of which we can ignore:
+ * -nv --no-verbose: be moderately quiet (-q is full quiet)
+ * -nc --no-clobber: abort if exists, neither download to FILE.n nor overwrite FILE
+ * -nH --no-host-directories: wget -r http://host/ won't create host/
+ * -np --no-parent
+ * "n::" above says that we accept -n[ARG].
+ * Specifying "n:" would be a bug: "-n ARG" would eat ARG!
+ */
+ , &G.fname_out, &G.dir_prefix,
+ &G.proxy_flag, &G.user_agent,
+ IF_FEATURE_WGET_TIMEOUT(&G.timeout_seconds) IF_NOT_FEATURE_WGET_TIMEOUT(NULL),
+ NULL, /* -t RETRIES */
+ NULL /* -n[ARG] */
+ IF_FEATURE_WGET_LONG_OPTIONS(, &headers_llist)
+ IF_FEATURE_WGET_LONG_OPTIONS(, &G.post_data)
+ );
+#if 0 /* option bits debug */
+ if (option_mask32 & WGET_OPT_RETRIES) bb_error_msg("-t NUM");
+ if (option_mask32 & WGET_OPT_nsomething) bb_error_msg("-nsomething");
+ if (option_mask32 & WGET_OPT_HEADER) bb_error_msg("--header");
+ if (option_mask32 & WGET_OPT_POST_DATA) bb_error_msg("--post-data");
+ if (option_mask32 & WGET_OPT_SPIDER) bb_error_msg("--spider");
+ exit(0);
+#endif
+ argv += optind;
+
+#if ENABLE_FEATURE_WGET_LONG_OPTIONS
+ if (headers_llist) {
+ int size = 0;
+ char *hdr;
+ llist_t *ll = headers_llist;
+ while (ll) {
+ size += strlen(ll->data) + 2;
+ ll = ll->link;
}
- buf_ptr = strstr(buf, "\r\n");
- if (buf_ptr) {
- *buf_ptr = '\0';
+ G.extra_headers = hdr = xmalloc(size + 1);
+ while (headers_llist) {
+ int bit;
+ const char *words;
+
+ size = sprintf(hdr, "%s\r\n",
+ (char*)llist_pop(&headers_llist));
+ /* a bit like index_in_substrings but don't match full key */
+ bit = 1;
+ words = wget_user_headers;
+ while (*words) {
+ if (strstr(hdr, words) == hdr) {
+ G.user_headers |= bit;
+ break;
+ }
+ bit <<= 1;
+ words += strlen(words) + 1;
+ }
+ hdr += size;
}
- } while (! isdigit(buf[0]) || buf[3] != ' ');
-
- return atoi(buf);
-}
-
-#ifdef CONFIG_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)
-{
- int width=0;
- get_terminal_width_height(0, &width, NULL);
- return (width);
-}
-
-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.. */
}
+#endif
- (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;
+ 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;
}
- 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(STDERR_FILENO, 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);
+ /* compat with wget: -O FILE can overwrite */
+ G.o_flags = O_WRONLY | O_CREAT | O_TRUNC;
}
-}
-#endif
-
-/* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
- * much of which was blatantly 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 1.75 2004/10/08 08:27:40 andersen Exp $
- */
+ while (*argv)
+ download_one_url(*argv++);
+ if (G.output_fd >= 0)
+ xclose(G.output_fd);
+#if ENABLE_FEATURE_CLEAN_UP && ENABLE_FEATURE_WGET_LONG_OPTIONS
+ free(G.extra_headers);
+#endif
+ FINI_G();
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+ return EXIT_SUCCESS;
+}
projects / oweals / busybox.git / blobdiff