diff options
Diffstat (limited to 'networking/wget.c')
| -rw-r--r-- | networking/wget.c | 836 |
1 files changed, 836 insertions, 0 deletions
diff --git a/networking/wget.c b/networking/wget.c new file mode 100644 index 0000000..23143d5 --- /dev/null +++ b/networking/wget.c @@ -0,0 +1,836 @@ +/* vi: set sw=4 ts=4: */ +/* + * wget - retrieve a file using HTTP or FTP + * + * Chip Rosenthal Covad Communications <chip@laserlink.net> + * + */ + +#include "libbb.h" + +struct host_info { + // May be used if we ever will want to free() all xstrdup()s... + /* char *allocated; */ + const char *path; + const char *user; + char *host; + int port; + smallint is_ftp; +}; + + +/* Globals (can be accessed from signal handlers) */ +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 lastsize; + off_t totalsize; + off_t transferred; /* Number of bytes transferred so far */ + const char *curfile; /* Name of current file being transferred */ + unsigned lastupdate_sec; + unsigned start_sec; +#endif + smallint chunked; /* chunked transfer encoding */ +}; +#define G (*(struct globals*)&bb_common_bufsiz1) +struct BUG_G_too_big { + char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1]; +}; +#define content_len (G.content_len ) +#define beg_range (G.beg_range ) +#define lastsize (G.lastsize ) +#define totalsize (G.totalsize ) +#define transferred (G.transferred ) +#define curfile (G.curfile ) +#define lastupdate_sec (G.lastupdate_sec ) +#define start_sec (G.start_sec ) +#define chunked (G.chunked ) +#define INIT_G() do { } while (0) + + +#if ENABLE_FEATURE_WGET_STATUSBAR +enum { + STALLTIME = 5 /* Seconds when xfer considered "stalled" */ +}; + +static unsigned int getttywidth(void) +{ + unsigned width; + get_terminal_width_height(0, &width, NULL); + return width; +} + +static void progressmeter(int flag) +{ + /* We can be called from signal handler */ + int save_errno = errno; + off_t abbrevsize; + unsigned since_last_update, elapsed; + unsigned ratio; + int barlength, i; + + if (flag == -1) { /* first call to progressmeter */ + start_sec = monotonic_sec(); + lastupdate_sec = start_sec; + lastsize = 0; + totalsize = content_len + beg_range; /* as content_len changes.. */ + } + + ratio = 100; + if (totalsize != 0 && !chunked) { + /* long long helps to have it working even if !LFS */ + ratio = (unsigned) (100ULL * (transferred+beg_range) / totalsize); + if (ratio > 100) ratio = 100; + } + + fprintf(stderr, "\r%-20.20s%4d%% ", curfile, ratio); + + barlength = getttywidth() - 49; + if (barlength > 0) { + /* god bless gcc for variable arrays :) */ + i = barlength * ratio / 100; + { + char buf[i+1]; + memset(buf, '*', i); + buf[i] = '\0'; + fprintf(stderr, "|%s%*s|", buf, barlength - i, ""); + } + } + i = 0; + abbrevsize = transferred + beg_range; + while (abbrevsize >= 100000) { + i++; + abbrevsize >>= 10; + } + /* see http://en.wikipedia.org/wiki/Tera */ + fprintf(stderr, "%6d%c ", (int)abbrevsize, " kMGTPEZY"[i]); + +// Nuts! Ain't it easier to update progress meter ONLY when we transferred++? + + elapsed = monotonic_sec(); + since_last_update = elapsed - lastupdate_sec; + if (transferred > lastsize) { + lastupdate_sec = elapsed; + lastsize = transferred; + if (since_last_update >= STALLTIME) { + /* We "cut off" these seconds from elapsed time + * by adjusting start time */ + start_sec += since_last_update; + } + since_last_update = 0; /* we are un-stalled now */ + } + elapsed -= start_sec; /* now it's "elapsed since start" */ + + if (since_last_update >= STALLTIME) { + fprintf(stderr, " - stalled -"); + } else { + off_t to_download = totalsize - beg_range; + if (transferred <= 0 || (int)elapsed <= 0 || transferred > to_download || chunked) { + fprintf(stderr, "--:--:-- ETA"); + } else { + /* to_download / (transferred/elapsed) - elapsed: */ + int eta = (int) ((unsigned long long)to_download*elapsed/transferred - elapsed); + /* (long long helps to have working ETA even if !LFS) */ + i = eta % 3600; + fprintf(stderr, "%02d:%02d:%02d ETA", eta / 3600, i / 60, i % 60); + } + } + + if (flag == 0) { + /* last call to progressmeter */ + alarm(0); + transferred = 0; + fputc('\n', stderr); + } else { + if (flag == -1) { /* first call to progressmeter */ + signal_SA_RESTART_empty_mask(SIGALRM, progressmeter); + } + alarm(1); + } + + errno = save_errno; +} +/* 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. + * + */ +#else /* FEATURE_WGET_STATUSBAR */ + +static ALWAYS_INLINE void progressmeter(int flag UNUSED_PARAM) { } + +#endif + + +/* Read NMEMB bytes into PTR from STREAM. Returns the number of bytes read, + * and a short count if an eof or non-interrupt error is encountered. */ +static size_t safe_fread(void *ptr, size_t nmemb, FILE *stream) +{ + size_t ret; + char *p = (char*)ptr; + + do { + clearerr(stream); + ret = fread(p, 1, nmemb, stream); + p += ret; + nmemb -= ret; + } while (nmemb && ferror(stream) && errno == EINTR); + + return p - (char*)ptr; +} + +/* 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) +{ + char *ret; + + do { + clearerr(stream); + ret = fgets(s, size, stream); + } while (ret == NULL && ferror(stream) && errno == EINTR); + + return ret; +} + +#if ENABLE_FEATURE_WGET_AUTHENTICATION +/* Base64-encode character string. buf is assumed to be char buf[512]. */ +static char *base64enc_512(char buf[512], const char *str) +{ + unsigned len = strlen(str); + if (len > 512/4*3 - 10) /* paranoia */ + len = 512/4*3 - 10; + bb_uuencode(buf, str, len, bb_uuenc_tbl_base64); + return buf; +} +#endif + + +static FILE *open_socket(len_and_sockaddr *lsa) +{ + FILE *fp; + + /* glibc 2.4 seems to try seeking on it - ??! */ + /* hopefully it understands what ESPIPE means... */ + fp = fdopen(xconnect_stream(lsa), "r+"); + if (fp == NULL) + bb_perror_msg_and_die("fdopen"); + + return fp; +} + + +static int ftpcmd(const char *s1, const char *s2, FILE *fp, char *buf) +{ + int result; + if (s1) { + if (!s2) s2 = ""; + fprintf(fp, "%s%s\r\n", s1, s2); + fflush(fp); + } + + do { + char *buf_ptr; + + if (fgets(buf, 510, fp) == NULL) { + bb_perror_msg_and_die("error getting response"); + } + buf_ptr = strstr(buf, "\r\n"); + if (buf_ptr) { + *buf_ptr = '\0'; + } + } while (!isdigit(buf[0]) || buf[3] != ' '); + + buf[3] = '\0'; + result = xatoi_u(buf); + buf[3] = ' '; + return result; +} + + +static void parse_url(char *src_url, struct host_info *h) +{ + char *url, *p, *sp; + + /* h->allocated = */ url = xstrdup(src_url); + + 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", "tcp", 21); + h->host = url + 6; + h->is_ftp = 1; + } else + bb_error_msg_and_die("not an http or ftp url: %s", url); + + // 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, '@'); + h->user = NULL; + if (sp != NULL) { + h->user = h->host; + *sp = '\0'; + h->host = sp + 1; + } + + sp = h->host; +} + + +static 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) + continue; + if (*s == '\n') + return NULL; + + /* convert the header name to lower case */ + for (s = buf; isalnum(*s) || *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 */ + *s++ = '\0'; + hdrval = skip_whitespace(s); + + /* locate the end of header */ + while (*s && *s != '\r' && *s != '\n') + ++s; + + /* end of header found */ + if (*s) { + *s = '\0'; + return hdrval; + } + + /* Rats! The buffer isn't big enough to hold the entire header value. */ + while (c = getc(fp), c != EOF && c != '\n') + continue; + /* *istrunc = 1; */ + return hdrval; +} + + +int wget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int wget_main(int argc UNUSED_PARAM, char **argv) +{ + char buf[512]; + struct host_info server, target; + len_and_sockaddr *lsa; + int status; + int port; + int try = 5; + unsigned opt; + char *str; + char *proxy = 0; + char *dir_prefix = NULL; +#if ENABLE_FEATURE_WGET_LONG_OPTIONS + char *extra_headers = NULL; + llist_t *headers_llist = NULL; +#endif + FILE *sfp = NULL; /* socket to web/ftp server */ + FILE *dfp; /* socket to ftp server (data) */ + char *fname_out; /* where to direct output (-O) */ + bool got_clen = 0; /* got content-length: from server */ + int output_fd = -1; + bool use_proxy = 1; /* Use proxies if env vars are set */ + const char *proxy_flag = "on"; /* Use proxies if env vars are set */ + const char *user_agent = "Wget";/* "User-Agent" header field */ + + static const char keywords[] ALIGN1 = + "content-length\0""transfer-encoding\0""chunked\0""location\0"; + enum { + KEY_content_length = 1, KEY_transfer_encoding, KEY_chunked, KEY_location + }; + enum { + WGET_OPT_CONTINUE = (1 << 0), + WGET_OPT_SPIDER = (1 << 1), + WGET_OPT_QUIET = (1 << 2), + WGET_OPT_OUTNAME = (1 << 3), + WGET_OPT_PREFIX = (1 << 4), + WGET_OPT_PROXY = (1 << 5), + WGET_OPT_USER_AGENT = (1 << 6), + WGET_OPT_RETRIES = (1 << 7), + WGET_OPT_NETWORK_READ_TIMEOUT = (1 << 8), + WGET_OPT_PASSIVE = (1 << 9), + WGET_OPT_HEADER = (1 << 10), + }; +#if ENABLE_FEATURE_WGET_LONG_OPTIONS + static const char wget_longopts[] ALIGN1 = + /* name, has_arg, val */ + "continue\0" No_argument "c" + "spider\0" No_argument "s" + "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" + /* Ignored: */ + // "tries\0" Required_argument "t" + // "timeout\0" Required_argument "T" + /* Ignored (we always use PASV): */ + "passive-ftp\0" No_argument "\xff" + "header\0" Required_argument "\xfe" + ; +#endif + + INIT_G(); + +#if ENABLE_FEATURE_WGET_LONG_OPTIONS + applet_long_options = wget_longopts; +#endif + /* server.allocated = target.allocated = NULL; */ + opt_complementary = "-1" USE_FEATURE_WGET_LONG_OPTIONS(":\xfe::"); + opt = getopt32(argv, "csqO:P:Y:U:" /*ignored:*/ "t:T:", + &fname_out, &dir_prefix, + &proxy_flag, &user_agent, + NULL, /* -t RETRIES */ + NULL /* -T NETWORK_READ_TIMEOUT */ + USE_FEATURE_WGET_LONG_OPTIONS(, &headers_llist) + ); + if (strcmp(proxy_flag, "off") == 0) { + /* Use the proxy if necessary */ + use_proxy = 0; + } +#if ENABLE_FEATURE_WGET_LONG_OPTIONS + if (headers_llist) { + int size = 1; + char *cp; + llist_t *ll = headers_llist; + while (ll) { + size += strlen(ll->data) + 2; + ll = ll->link; + } + extra_headers = cp = xmalloc(size); + while (headers_llist) { + cp += sprintf(cp, "%s\r\n", (char*)llist_pop(&headers_llist)); + } + } +#endif + + parse_url(argv[optind], &target); + server.host = target.host; + server.port = target.port; + + /* Use the proxy if necessary */ + if (use_proxy) { + proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy"); + if (proxy && *proxy) { + parse_url(proxy, &server); + } else { + use_proxy = 0; + } + } + + /* 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: +/* +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. +*/ + case 204: + 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; +} |