[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * wget - retrieve a file using HTTP or FTP
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| 4 | *
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| 5 | * Chip Rosenthal Covad Communications <chip@laserlink.net>
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[2725] | 6 | * Licensed under GPLv2, see file LICENSE in this source tree.
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[821] | 7 | *
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[2725] | 8 | * Copyright (C) 2010 Bradley M. Kuhn <bkuhn@ebb.org>
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| 9 | * Kuhn's copyrights are licensed GPLv2-or-later. File as a whole remains GPLv2.
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[821] | 10 | */
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[3232] | 11 |
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| 12 | //usage:#define wget_trivial_usage
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| 13 | //usage: IF_FEATURE_WGET_LONG_OPTIONS(
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| 14 | //usage: "[-c|--continue] [-s|--spider] [-q|--quiet] [-O|--output-document FILE]\n"
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| 15 | //usage: " [--header 'header: value'] [-Y|--proxy on/off] [-P DIR]\n"
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| 16 | /* Since we ignore these opts, we don't show them in --help */
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| 17 | /* //usage: " [--no-check-certificate] [--no-cache]" */
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| 18 | //usage: " [-U|--user-agent AGENT]" IF_FEATURE_WGET_TIMEOUT(" [-T SEC]") " URL..."
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| 19 | //usage: )
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| 20 | //usage: IF_NOT_FEATURE_WGET_LONG_OPTIONS(
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| 21 | //usage: "[-csq] [-O FILE] [-Y on/off] [-P DIR] [-U AGENT]"
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| 22 | //usage: IF_FEATURE_WGET_TIMEOUT(" [-T SEC]") " URL..."
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| 23 | //usage: )
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| 24 | //usage:#define wget_full_usage "\n\n"
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| 25 | //usage: "Retrieve files via HTTP or FTP\n"
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| 26 | //usage: "\n -s Spider mode - only check file existence"
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| 27 | //usage: "\n -c Continue retrieval of aborted transfer"
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| 28 | //usage: "\n -q Quiet"
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| 29 | //usage: "\n -P DIR Save to DIR (default .)"
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| 30 | //usage: IF_FEATURE_WGET_TIMEOUT(
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| 31 | //usage: "\n -T SEC Network read timeout is SEC seconds"
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| 32 | //usage: )
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| 33 | //usage: "\n -O FILE Save to FILE ('-' for stdout)"
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| 34 | //usage: "\n -U STR Use STR for User-Agent header"
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| 35 | //usage: "\n -Y Use proxy ('on' or 'off')"
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| 36 |
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[1765] | 37 | #include "libbb.h"
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[821] | 38 |
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[3232] | 39 | #if 0
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| 40 | # define log_io(...) bb_error_msg(__VA_ARGS__)
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| 41 | #else
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| 42 | # define log_io(...) ((void)0)
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| 43 | #endif
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| 44 |
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| 45 |
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[821] | 46 | struct host_info {
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[3232] | 47 | char *allocated;
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[2725] | 48 | const char *path;
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| 49 | const char *user;
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| 50 | char *host;
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| 51 | int port;
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| 52 | smallint is_ftp;
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[821] | 53 | };
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| 54 |
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| 55 |
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[2725] | 56 | /* Globals */
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| 57 | struct globals {
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| 58 | off_t content_len; /* Content-length of the file */
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| 59 | off_t beg_range; /* Range at which continue begins */
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[1765] | 60 | #if ENABLE_FEATURE_WGET_STATUSBAR
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[2725] | 61 | off_t transferred; /* Number of bytes transferred so far */
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| 62 | const char *curfile; /* Name of current file being transferred */
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| 63 | bb_progress_t pmt;
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[1765] | 64 | #endif
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[3232] | 65 | char *dir_prefix;
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| 66 | #if ENABLE_FEATURE_WGET_LONG_OPTIONS
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| 67 | char *post_data;
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| 68 | char *extra_headers;
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| 69 | #endif
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| 70 | char *fname_out; /* where to direct output (-O) */
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| 71 | const char *proxy_flag; /* Use proxies if env vars are set */
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| 72 | const char *user_agent; /* "User-Agent" header field */
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[2725] | 73 | #if ENABLE_FEATURE_WGET_TIMEOUT
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| 74 | unsigned timeout_seconds;
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| 75 | #endif
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[3232] | 76 | int output_fd;
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| 77 | int o_flags;
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[2725] | 78 | smallint chunked; /* chunked transfer encoding */
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| 79 | smallint got_clen; /* got content-length: from server */
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[3232] | 80 | /* Local downloads do benefit from big buffer.
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| 81 | * With 512 byte buffer, it was measured to be
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| 82 | * an order of magnitude slower than with big one.
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| 83 | */
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| 84 | uint64_t just_to_align_next_member;
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| 85 | char wget_buf[CONFIG_FEATURE_COPYBUF_KB*1024];
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[2725] | 86 | } FIX_ALIASING;
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[3232] | 87 | #define G (*ptr_to_globals)
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[2725] | 88 | #define INIT_G() do { \
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[3232] | 89 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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[2725] | 90 | IF_FEATURE_WGET_TIMEOUT(G.timeout_seconds = 900;) \
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| 91 | } while (0)
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| 92 |
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| 93 |
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| 94 | /* Must match option string! */
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[821] | 95 | enum {
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[2725] | 96 | WGET_OPT_CONTINUE = (1 << 0),
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| 97 | WGET_OPT_SPIDER = (1 << 1),
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| 98 | WGET_OPT_QUIET = (1 << 2),
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| 99 | WGET_OPT_OUTNAME = (1 << 3),
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| 100 | WGET_OPT_PREFIX = (1 << 4),
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| 101 | WGET_OPT_PROXY = (1 << 5),
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| 102 | WGET_OPT_USER_AGENT = (1 << 6),
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| 103 | WGET_OPT_NETWORK_READ_TIMEOUT = (1 << 7),
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| 104 | WGET_OPT_RETRIES = (1 << 8),
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| 105 | WGET_OPT_PASSIVE = (1 << 9),
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| 106 | WGET_OPT_HEADER = (1 << 10) * ENABLE_FEATURE_WGET_LONG_OPTIONS,
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| 107 | WGET_OPT_POST_DATA = (1 << 11) * ENABLE_FEATURE_WGET_LONG_OPTIONS,
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[821] | 108 | };
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[2725] | 109 |
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| 110 | enum {
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| 111 | PROGRESS_START = -1,
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| 112 | PROGRESS_END = 0,
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| 113 | PROGRESS_BUMP = 1,
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| 114 | };
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| 115 | #if ENABLE_FEATURE_WGET_STATUSBAR
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| 116 | static void progress_meter(int flag)
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| 117 | {
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| 118 | if (option_mask32 & WGET_OPT_QUIET)
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| 119 | return;
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| 120 |
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| 121 | if (flag == PROGRESS_START)
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[3232] | 122 | bb_progress_init(&G.pmt, G.curfile);
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[2725] | 123 |
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[3232] | 124 | bb_progress_update(&G.pmt,
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| 125 | G.beg_range,
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| 126 | G.transferred,
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| 127 | (G.chunked || !G.got_clen) ? 0 : G.beg_range + G.transferred + G.content_len
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| 128 | );
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[2725] | 129 |
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| 130 | if (flag == PROGRESS_END) {
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[3232] | 131 | bb_progress_free(&G.pmt);
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[2725] | 132 | bb_putchar_stderr('\n');
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| 133 | G.transferred = 0;
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| 134 | }
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| 135 | }
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[821] | 136 | #else
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[2725] | 137 | static ALWAYS_INLINE void progress_meter(int flag UNUSED_PARAM) { }
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[821] | 138 | #endif
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| 139 |
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[2725] | 140 |
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| 141 | /* IPv6 knows scoped address types i.e. link and site local addresses. Link
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| 142 | * local addresses can have a scope identifier to specify the
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| 143 | * interface/link an address is valid on (e.g. fe80::1%eth0). This scope
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| 144 | * identifier is only valid on a single node.
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| 145 | *
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| 146 | * RFC 4007 says that the scope identifier MUST NOT be sent across the wire,
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| 147 | * unless all nodes agree on the semantic. Apache e.g. regards zone identifiers
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| 148 | * in the Host header as invalid requests, see
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| 149 | * https://issues.apache.org/bugzilla/show_bug.cgi?id=35122
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| 150 | */
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| 151 | static void strip_ipv6_scope_id(char *host)
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| 152 | {
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| 153 | char *scope, *cp;
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| 154 |
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| 155 | /* bbox wget actually handles IPv6 addresses without [], like
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| 156 | * wget "http://::1/xxx", but this is not standard.
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| 157 | * To save code, _here_ we do not support it. */
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| 158 |
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| 159 | if (host[0] != '[')
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| 160 | return; /* not IPv6 */
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| 161 |
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| 162 | scope = strchr(host, '%');
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| 163 | if (!scope)
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| 164 | return;
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| 165 |
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| 166 | /* Remove the IPv6 zone identifier from the host address */
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| 167 | cp = strchr(host, ']');
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| 168 | if (!cp || (cp[1] != ':' && cp[1] != '\0')) {
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| 169 | /* malformed address (not "[xx]:nn" or "[xx]") */
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| 170 | return;
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| 171 | }
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| 172 |
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| 173 | /* cp points to "]...", scope points to "%eth0]..." */
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| 174 | overlapping_strcpy(scope, cp);
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| 175 | }
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| 176 |
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[1765] | 177 | #if ENABLE_FEATURE_WGET_AUTHENTICATION
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[3232] | 178 | /* Base64-encode character string. */
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| 179 | static char *base64enc(const char *str)
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[1765] | 180 | {
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| 181 | unsigned len = strlen(str);
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[3232] | 182 | if (len > sizeof(G.wget_buf)/4*3 - 10) /* paranoia */
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| 183 | len = sizeof(G.wget_buf)/4*3 - 10;
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| 184 | bb_uuencode(G.wget_buf, str, len, bb_uuenc_tbl_base64);
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| 185 | return G.wget_buf;
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[821] | 186 | }
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| 187 | #endif
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| 188 |
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[2725] | 189 | static char* sanitize_string(char *s)
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[821] | 190 | {
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[2725] | 191 | unsigned char *p = (void *) s;
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| 192 | while (*p >= ' ')
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| 193 | p++;
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| 194 | *p = '\0';
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| 195 | return s;
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| 196 | }
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[821] | 197 |
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[2725] | 198 | static FILE *open_socket(len_and_sockaddr *lsa)
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| 199 | {
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| 200 | FILE *fp;
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[821] | 201 |
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[2725] | 202 | /* glibc 2.4 seems to try seeking on it - ??! */
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| 203 | /* hopefully it understands what ESPIPE means... */
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| 204 | fp = fdopen(xconnect_stream(lsa), "r+");
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| 205 | if (fp == NULL)
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[3232] | 206 | bb_perror_msg_and_die(bb_msg_memory_exhausted);
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[821] | 207 |
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[2725] | 208 | return fp;
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| 209 | }
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[821] | 210 |
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[3232] | 211 | /* Returns '\n' if it was seen, else '\0'. Trims at first '\r' or '\n' */
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| 212 | static char fgets_and_trim(FILE *fp)
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[2725] | 213 | {
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[3232] | 214 | char c;
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| 215 | char *buf_ptr;
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| 216 |
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| 217 | if (fgets(G.wget_buf, sizeof(G.wget_buf) - 1, fp) == NULL)
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| 218 | bb_perror_msg_and_die("error getting response");
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| 219 |
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| 220 | buf_ptr = strchrnul(G.wget_buf, '\n');
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| 221 | c = *buf_ptr;
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| 222 | *buf_ptr = '\0';
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| 223 | buf_ptr = strchrnul(G.wget_buf, '\r');
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| 224 | *buf_ptr = '\0';
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| 225 |
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| 226 | log_io("< %s", G.wget_buf);
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| 227 |
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| 228 | return c;
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| 229 | }
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| 230 |
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| 231 | static int ftpcmd(const char *s1, const char *s2, FILE *fp)
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| 232 | {
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[2725] | 233 | int result;
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| 234 | if (s1) {
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[3232] | 235 | if (!s2)
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| 236 | s2 = "";
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[2725] | 237 | fprintf(fp, "%s%s\r\n", s1, s2);
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| 238 | fflush(fp);
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[3232] | 239 | log_io("> %s%s", s1, s2);
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[821] | 240 | }
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| 241 |
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| 242 | do {
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[3232] | 243 | fgets_and_trim(fp);
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| 244 | } while (!isdigit(G.wget_buf[0]) || G.wget_buf[3] != ' ');
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[821] | 245 |
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[3232] | 246 | G.wget_buf[3] = '\0';
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| 247 | result = xatoi_positive(G.wget_buf);
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| 248 | G.wget_buf[3] = ' ';
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[2725] | 249 | return result;
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[821] | 250 | }
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| 251 |
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[3232] | 252 | static void parse_url(const char *src_url, struct host_info *h)
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[821] | 253 | {
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[1765] | 254 | char *url, *p, *sp;
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[821] | 255 |
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[3232] | 256 | free(h->allocated);
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| 257 | h->allocated = url = xstrdup(src_url);
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[1765] | 258 |
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[821] | 259 | if (strncmp(url, "http://", 7) == 0) {
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| 260 | h->port = bb_lookup_port("http", "tcp", 80);
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| 261 | h->host = url + 7;
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| 262 | h->is_ftp = 0;
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| 263 | } else if (strncmp(url, "ftp://", 6) == 0) {
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[1765] | 264 | h->port = bb_lookup_port("ftp", "tcp", 21);
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[821] | 265 | h->host = url + 6;
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| 266 | h->is_ftp = 1;
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| 267 | } else
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[2725] | 268 | bb_error_msg_and_die("not an http or ftp url: %s", sanitize_string(url));
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[821] | 269 |
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[1765] | 270 | // FYI:
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| 271 | // "Real" wget 'http://busybox.net?var=a/b' sends this request:
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| 272 | // 'GET /?var=a/b HTTP 1.0'
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| 273 | // and saves 'index.html?var=a%2Fb' (we save 'b')
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| 274 | // wget 'http://busybox.net?login=john@doe':
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| 275 | // request: 'GET /?login=john@doe HTTP/1.0'
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| 276 | // saves: 'index.html?login=john@doe' (we save '?login=john@doe')
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| 277 | // wget 'http://busybox.net#test/test':
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| 278 | // request: 'GET / HTTP/1.0'
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| 279 | // saves: 'index.html' (we save 'test')
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| 280 | //
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| 281 | // We also don't add unique .N suffix if file exists...
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[821] | 282 | sp = strchr(h->host, '/');
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[1765] | 283 | p = strchr(h->host, '?'); if (!sp || (p && sp > p)) sp = p;
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| 284 | p = strchr(h->host, '#'); if (!sp || (p && sp > p)) sp = p;
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| 285 | if (!sp) {
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[2725] | 286 | h->path = "";
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[1765] | 287 | } else if (*sp == '/') {
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| 288 | *sp = '\0';
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| 289 | h->path = sp + 1;
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| 290 | } else { // '#' or '?'
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| 291 | // http://busybox.net?login=john@doe is a valid URL
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| 292 | // memmove converts to:
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| 293 | // http:/busybox.nett?login=john@doe...
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[2725] | 294 | memmove(h->host - 1, h->host, sp - h->host);
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[1765] | 295 | h->host--;
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| 296 | sp[-1] = '\0';
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[821] | 297 | h->path = sp;
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[1765] | 298 | }
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[821] | 299 |
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[2725] | 300 | // We used to set h->user to NULL here, but this interferes
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| 301 | // with handling of code 302 ("object was moved")
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| 302 |
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[1765] | 303 | sp = strrchr(h->host, '@');
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| 304 | if (sp != NULL) {
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[3232] | 305 | // URL-decode "user:password" string before base64-encoding:
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| 306 | // wget http://test:my%20pass@example.com should send
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| 307 | // Authorization: Basic dGVzdDpteSBwYXNz
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| 308 | // which decodes to "test:my pass".
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| 309 | // Standard wget and curl do this too.
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[1765] | 310 | *sp = '\0';
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[3232] | 311 | h->user = percent_decode_in_place(h->host, /*strict:*/ 0);
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[1765] | 312 | h->host = sp + 1;
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[821] | 313 | }
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| 314 |
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[1765] | 315 | sp = h->host;
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[821] | 316 | }
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| 317 |
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[3232] | 318 | static char *gethdr(FILE *fp)
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[821] | 319 | {
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| 320 | char *s, *hdrval;
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| 321 | int c;
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| 322 |
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| 323 | /* retrieve header line */
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[3232] | 324 | c = fgets_and_trim(fp);
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[821] | 325 |
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[3232] | 326 | /* end of the headers? */
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| 327 | if (G.wget_buf[0] == '\0')
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[821] | 328 | return NULL;
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| 329 |
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| 330 | /* convert the header name to lower case */
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[3232] | 331 | for (s = G.wget_buf; isalnum(*s) || *s == '-' || *s == '.'; ++s) {
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[2725] | 332 | /* tolower for "A-Z", no-op for "0-9a-z-." */
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[3232] | 333 | *s |= 0x20;
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[2725] | 334 | }
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[821] | 335 |
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| 336 | /* verify we are at the end of the header name */
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| 337 | if (*s != ':')
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[3232] | 338 | bb_error_msg_and_die("bad header line: %s", sanitize_string(G.wget_buf));
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[821] | 339 |
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| 340 | /* locate the start of the header value */
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[2725] | 341 | *s++ = '\0';
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| 342 | hdrval = skip_whitespace(s);
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[821] | 343 |
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[3232] | 344 | if (c != '\n') {
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| 345 | /* Rats! The buffer isn't big enough to hold the entire header value */
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| 346 | while (c = getc(fp), c != EOF && c != '\n')
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| 347 | continue;
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[821] | 348 | }
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| 349 |
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| 350 | return hdrval;
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| 351 | }
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| 352 |
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[3232] | 353 | static void reset_beg_range_to_zero(void)
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[821] | 354 | {
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[3232] | 355 | bb_error_msg("restart failed");
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| 356 | G.beg_range = 0;
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| 357 | xlseek(G.output_fd, 0, SEEK_SET);
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| 358 | /* Done at the end instead: */
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| 359 | /* ftruncate(G.output_fd, 0); */
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[2725] | 360 | }
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[821] | 361 |
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[2725] | 362 | static FILE* prepare_ftp_session(FILE **dfpp, struct host_info *target, len_and_sockaddr *lsa)
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| 363 | {
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| 364 | FILE *sfp;
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| 365 | char *str;
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| 366 | int port;
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[821] | 367 |
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[2725] | 368 | if (!target->user)
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| 369 | target->user = xstrdup("anonymous:busybox@");
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| 370 |
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| 371 | sfp = open_socket(lsa);
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[3232] | 372 | if (ftpcmd(NULL, NULL, sfp) != 220)
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| 373 | bb_error_msg_and_die("%s", sanitize_string(G.wget_buf + 4));
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[2725] | 374 |
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| 375 | /*
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| 376 | * Splitting username:password pair,
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| 377 | * trying to log in
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| 378 | */
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| 379 | str = strchr(target->user, ':');
|
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| 380 | if (str)
|
---|
| 381 | *str++ = '\0';
|
---|
[3232] | 382 | switch (ftpcmd("USER ", target->user, sfp)) {
|
---|
[2725] | 383 | case 230:
|
---|
| 384 | break;
|
---|
| 385 | case 331:
|
---|
[3232] | 386 | if (ftpcmd("PASS ", str, sfp) == 230)
|
---|
[2725] | 387 | break;
|
---|
| 388 | /* fall through (failed login) */
|
---|
| 389 | default:
|
---|
[3232] | 390 | bb_error_msg_and_die("ftp login: %s", sanitize_string(G.wget_buf + 4));
|
---|
[2725] | 391 | }
|
---|
| 392 |
|
---|
[3232] | 393 | ftpcmd("TYPE I", NULL, sfp);
|
---|
[2725] | 394 |
|
---|
| 395 | /*
|
---|
| 396 | * Querying file size
|
---|
| 397 | */
|
---|
[3232] | 398 | if (ftpcmd("SIZE ", target->path, sfp) == 213) {
|
---|
| 399 | G.content_len = BB_STRTOOFF(G.wget_buf + 4, NULL, 10);
|
---|
[2725] | 400 | if (G.content_len < 0 || errno) {
|
---|
| 401 | bb_error_msg_and_die("SIZE value is garbage");
|
---|
[821] | 402 | }
|
---|
[2725] | 403 | G.got_clen = 1;
|
---|
| 404 | }
|
---|
[821] | 405 |
|
---|
[2725] | 406 | /*
|
---|
| 407 | * Entering passive mode
|
---|
| 408 | */
|
---|
[3232] | 409 | if (ftpcmd("PASV", NULL, sfp) != 227) {
|
---|
[2725] | 410 | pasv_error:
|
---|
[3232] | 411 | bb_error_msg_and_die("bad response to %s: %s", "PASV", sanitize_string(G.wget_buf));
|
---|
[2725] | 412 | }
|
---|
| 413 | // Response is "227 garbageN1,N2,N3,N4,P1,P2[)garbage]
|
---|
| 414 | // Server's IP is N1.N2.N3.N4 (we ignore it)
|
---|
| 415 | // Server's port for data connection is P1*256+P2
|
---|
[3232] | 416 | str = strrchr(G.wget_buf, ')');
|
---|
[2725] | 417 | if (str) str[0] = '\0';
|
---|
[3232] | 418 | str = strrchr(G.wget_buf, ',');
|
---|
[2725] | 419 | if (!str) goto pasv_error;
|
---|
| 420 | port = xatou_range(str+1, 0, 255);
|
---|
| 421 | *str = '\0';
|
---|
[3232] | 422 | str = strrchr(G.wget_buf, ',');
|
---|
[2725] | 423 | if (!str) goto pasv_error;
|
---|
| 424 | port += xatou_range(str+1, 0, 255) * 256;
|
---|
[3232] | 425 | set_nport(&lsa->u.sa, htons(port));
|
---|
[821] | 426 |
|
---|
[2725] | 427 | *dfpp = open_socket(lsa);
|
---|
[821] | 428 |
|
---|
[3232] | 429 | if (G.beg_range != 0) {
|
---|
| 430 | sprintf(G.wget_buf, "REST %"OFF_FMT"u", G.beg_range);
|
---|
| 431 | if (ftpcmd(G.wget_buf, NULL, sfp) == 350)
|
---|
[2725] | 432 | G.content_len -= G.beg_range;
|
---|
[3232] | 433 | else
|
---|
| 434 | reset_beg_range_to_zero();
|
---|
[2725] | 435 | }
|
---|
[821] | 436 |
|
---|
[3232] | 437 | if (ftpcmd("RETR ", target->path, sfp) > 150)
|
---|
| 438 | bb_error_msg_and_die("bad response to %s: %s", "RETR", sanitize_string(G.wget_buf));
|
---|
[2725] | 439 |
|
---|
| 440 | return sfp;
|
---|
[821] | 441 | }
|
---|
| 442 |
|
---|
[3232] | 443 | static void NOINLINE retrieve_file_data(FILE *dfp)
|
---|
[821] | 444 | {
|
---|
[2725] | 445 | #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
|
---|
| 446 | # if ENABLE_FEATURE_WGET_TIMEOUT
|
---|
[3232] | 447 | unsigned second_cnt = G.timeout_seconds;
|
---|
[2725] | 448 | # endif
|
---|
| 449 | struct pollfd polldata;
|
---|
[821] | 450 |
|
---|
[2725] | 451 | polldata.fd = fileno(dfp);
|
---|
| 452 | polldata.events = POLLIN | POLLPRI;
|
---|
| 453 | #endif
|
---|
| 454 | progress_meter(PROGRESS_START);
|
---|
| 455 |
|
---|
| 456 | if (G.chunked)
|
---|
| 457 | goto get_clen;
|
---|
| 458 |
|
---|
| 459 | /* Loops only if chunked */
|
---|
| 460 | while (1) {
|
---|
[2859] | 461 |
|
---|
| 462 | #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
|
---|
[3232] | 463 | /* Must use nonblocking I/O, otherwise fread will loop
|
---|
| 464 | * and *block* until it reads full buffer,
|
---|
| 465 | * which messes up progress bar and/or timeout logic.
|
---|
| 466 | * Because of nonblocking I/O, we need to dance
|
---|
| 467 | * very carefully around EAGAIN. See explanation at
|
---|
| 468 | * clearerr() calls.
|
---|
| 469 | */
|
---|
[2859] | 470 | ndelay_on(polldata.fd);
|
---|
| 471 | #endif
|
---|
[2725] | 472 | while (1) {
|
---|
| 473 | int n;
|
---|
| 474 | unsigned rdsz;
|
---|
| 475 |
|
---|
| 476 | #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
|
---|
[2859] | 477 | /* fread internally uses read loop, which in our case
|
---|
| 478 | * is usually exited when we get EAGAIN.
|
---|
| 479 | * In this case, libc sets error marker on the stream.
|
---|
| 480 | * Need to clear it before next fread to avoid possible
|
---|
| 481 | * rare false positive ferror below. Rare because usually
|
---|
| 482 | * fread gets more than zero bytes, and we don't fall
|
---|
| 483 | * into if (n <= 0) ...
|
---|
| 484 | */
|
---|
| 485 | clearerr(dfp);
|
---|
[3232] | 486 | #endif
|
---|
[2859] | 487 | errno = 0;
|
---|
[3232] | 488 | rdsz = sizeof(G.wget_buf);
|
---|
| 489 | if (G.got_clen) {
|
---|
| 490 | if (G.content_len < (off_t)sizeof(G.wget_buf)) {
|
---|
| 491 | if ((int)G.content_len <= 0)
|
---|
| 492 | break;
|
---|
| 493 | rdsz = (unsigned)G.content_len;
|
---|
| 494 | }
|
---|
| 495 | }
|
---|
| 496 | n = fread(G.wget_buf, 1, rdsz, dfp);
|
---|
| 497 |
|
---|
| 498 | if (n > 0) {
|
---|
| 499 | xwrite(G.output_fd, G.wget_buf, n);
|
---|
| 500 | #if ENABLE_FEATURE_WGET_STATUSBAR
|
---|
| 501 | G.transferred += n;
|
---|
| 502 | #endif
|
---|
| 503 | if (G.got_clen) {
|
---|
| 504 | G.content_len -= n;
|
---|
| 505 | if (G.content_len == 0)
|
---|
| 506 | break;
|
---|
| 507 | }
|
---|
| 508 | #if ENABLE_FEATURE_WGET_TIMEOUT
|
---|
| 509 | second_cnt = G.timeout_seconds;
|
---|
| 510 | #endif
|
---|
| 511 | continue;
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | /* n <= 0.
|
---|
| 515 | * man fread:
|
---|
[2859] | 516 | * If error occurs, or EOF is reached, the return value
|
---|
| 517 | * is a short item count (or zero).
|
---|
| 518 | * fread does not distinguish between EOF and error.
|
---|
| 519 | */
|
---|
[3232] | 520 | if (errno != EAGAIN) {
|
---|
| 521 | if (ferror(dfp)) {
|
---|
| 522 | progress_meter(PROGRESS_END);
|
---|
[2859] | 523 | bb_perror_msg_and_die(bb_msg_read_error);
|
---|
[3232] | 524 | }
|
---|
[2859] | 525 | break; /* EOF, not error */
|
---|
[2725] | 526 | }
|
---|
[2859] | 527 |
|
---|
[3232] | 528 | #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
|
---|
| 529 | /* It was EAGAIN. There is no data. Wait up to one second
|
---|
| 530 | * then abort if timed out, or update the bar and try reading again.
|
---|
| 531 | */
|
---|
| 532 | if (safe_poll(&polldata, 1, 1000) == 0) {
|
---|
| 533 | # if ENABLE_FEATURE_WGET_TIMEOUT
|
---|
| 534 | if (second_cnt != 0 && --second_cnt == 0) {
|
---|
| 535 | progress_meter(PROGRESS_END);
|
---|
| 536 | bb_error_msg_and_die("download timed out");
|
---|
| 537 | }
|
---|
| 538 | # endif
|
---|
| 539 | /* We used to loop back to poll here,
|
---|
| 540 | * but there is no great harm in letting fread
|
---|
| 541 | * to try reading anyway.
|
---|
| 542 | */
|
---|
| 543 | }
|
---|
| 544 | /* Need to do it _every_ second for "stalled" indicator
|
---|
| 545 | * to be shown properly.
|
---|
| 546 | */
|
---|
[2725] | 547 | progress_meter(PROGRESS_BUMP);
|
---|
| 548 | #endif
|
---|
[3232] | 549 | } /* while (reading data) */
|
---|
| 550 |
|
---|
[2859] | 551 | #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
|
---|
[3232] | 552 | clearerr(dfp);
|
---|
| 553 | ndelay_off(polldata.fd); /* else fgets can get very unhappy */
|
---|
[2859] | 554 | #endif
|
---|
[2725] | 555 | if (!G.chunked)
|
---|
| 556 | break;
|
---|
| 557 |
|
---|
[3232] | 558 | fgets_and_trim(dfp); /* Eat empty line */
|
---|
[2725] | 559 | get_clen:
|
---|
[3232] | 560 | fgets_and_trim(dfp);
|
---|
| 561 | G.content_len = STRTOOFF(G.wget_buf, NULL, 16);
|
---|
[2725] | 562 | /* FIXME: error check? */
|
---|
| 563 | if (G.content_len == 0)
|
---|
| 564 | break; /* all done! */
|
---|
| 565 | G.got_clen = 1;
|
---|
[3232] | 566 | /*
|
---|
| 567 | * Note that fgets may result in some data being buffered in dfp.
|
---|
| 568 | * We loop back to fread, which will retrieve this data.
|
---|
| 569 | * Also note that code has to be arranged so that fread
|
---|
| 570 | * is done _before_ one-second poll wait - poll doesn't know
|
---|
| 571 | * about stdio buffering and can result in spurious one second waits!
|
---|
| 572 | */
|
---|
[2725] | 573 | }
|
---|
| 574 |
|
---|
[3232] | 575 | /* If -c failed, we restart from the beginning,
|
---|
| 576 | * but we do not truncate file then, we do it only now, at the end.
|
---|
| 577 | * This lets user to ^C if his 99% complete 10 GB file download
|
---|
| 578 | * failed to restart *without* losing the almost complete file.
|
---|
| 579 | */
|
---|
| 580 | {
|
---|
| 581 | off_t pos = lseek(G.output_fd, 0, SEEK_CUR);
|
---|
| 582 | if (pos != (off_t)-1)
|
---|
| 583 | ftruncate(G.output_fd, pos);
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 | /* Draw full bar and free its resources */
|
---|
| 587 | G.chunked = 0; /* makes it show 100% even for chunked download */
|
---|
| 588 | G.got_clen = 1; /* makes it show 100% even for download of (formerly) unknown size */
|
---|
[2725] | 589 | progress_meter(PROGRESS_END);
|
---|
[821] | 590 | }
|
---|
| 591 |
|
---|
[3232] | 592 | static void download_one_url(const char *url)
|
---|
[821] | 593 | {
|
---|
[3232] | 594 | bool use_proxy; /* Use proxies if env vars are set */
|
---|
| 595 | int redir_limit;
|
---|
[2725] | 596 | len_and_sockaddr *lsa;
|
---|
| 597 | FILE *sfp; /* socket to web/ftp server */
|
---|
| 598 | FILE *dfp; /* socket to ftp server (data) */
|
---|
[3232] | 599 | char *proxy = NULL;
|
---|
| 600 | char *fname_out_alloc;
|
---|
| 601 | char *redirected_path = NULL;
|
---|
| 602 | struct host_info server;
|
---|
| 603 | struct host_info target;
|
---|
[821] | 604 |
|
---|
[3232] | 605 | server.allocated = NULL;
|
---|
| 606 | target.allocated = NULL;
|
---|
| 607 | server.user = NULL;
|
---|
| 608 | target.user = NULL;
|
---|
[821] | 609 |
|
---|
[3232] | 610 | parse_url(url, &target);
|
---|
[821] | 611 |
|
---|
[2725] | 612 | /* Use the proxy if necessary */
|
---|
[3232] | 613 | use_proxy = (strcmp(G.proxy_flag, "off") != 0);
|
---|
[2725] | 614 | if (use_proxy) {
|
---|
| 615 | proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
|
---|
[3232] | 616 | use_proxy = (proxy && proxy[0]);
|
---|
| 617 | if (use_proxy)
|
---|
[2725] | 618 | parse_url(proxy, &server);
|
---|
[821] | 619 | }
|
---|
[2725] | 620 | if (!use_proxy) {
|
---|
| 621 | server.port = target.port;
|
---|
| 622 | if (ENABLE_FEATURE_IPV6) {
|
---|
[3232] | 623 | //free(server.allocated); - can't be non-NULL
|
---|
| 624 | server.host = server.allocated = xstrdup(target.host);
|
---|
[2725] | 625 | } else {
|
---|
| 626 | server.host = target.host;
|
---|
| 627 | }
|
---|
[821] | 628 | }
|
---|
| 629 |
|
---|
[2725] | 630 | if (ENABLE_FEATURE_IPV6)
|
---|
| 631 | strip_ipv6_scope_id(target.host);
|
---|
[1765] | 632 |
|
---|
[3232] | 633 | /* If there was no -O FILE, guess output filename */
|
---|
| 634 | fname_out_alloc = NULL;
|
---|
| 635 | if (!(option_mask32 & WGET_OPT_OUTNAME)) {
|
---|
| 636 | G.fname_out = bb_get_last_path_component_nostrip(target.path);
|
---|
[2725] | 637 | /* handle "wget http://kernel.org//" */
|
---|
[3232] | 638 | if (G.fname_out[0] == '/' || !G.fname_out[0])
|
---|
| 639 | G.fname_out = (char*)"index.html";
|
---|
[2725] | 640 | /* -P DIR is considered only if there was no -O FILE */
|
---|
[3232] | 641 | if (G.dir_prefix)
|
---|
| 642 | G.fname_out = fname_out_alloc = concat_path_file(G.dir_prefix, G.fname_out);
|
---|
| 643 | else {
|
---|
| 644 | /* redirects may free target.path later, need to make a copy */
|
---|
| 645 | G.fname_out = fname_out_alloc = xstrdup(G.fname_out);
|
---|
[1765] | 646 | }
|
---|
[821] | 647 | }
|
---|
[2725] | 648 | #if ENABLE_FEATURE_WGET_STATUSBAR
|
---|
[3232] | 649 | G.curfile = bb_get_last_path_component_nostrip(G.fname_out);
|
---|
[2725] | 650 | #endif
|
---|
[821] | 651 |
|
---|
[2725] | 652 | /* Determine where to start transfer */
|
---|
[3232] | 653 | G.beg_range = 0;
|
---|
| 654 | if (option_mask32 & WGET_OPT_CONTINUE) {
|
---|
| 655 | G.output_fd = open(G.fname_out, O_WRONLY);
|
---|
| 656 | if (G.output_fd >= 0) {
|
---|
| 657 | G.beg_range = xlseek(G.output_fd, 0, SEEK_END);
|
---|
[2725] | 658 | }
|
---|
| 659 | /* File doesn't exist. We do not create file here yet.
|
---|
[3232] | 660 | * We are not sure it exists on remote side */
|
---|
[2725] | 661 | }
|
---|
| 662 |
|
---|
| 663 | redir_limit = 5;
|
---|
| 664 | resolve_lsa:
|
---|
| 665 | lsa = xhost2sockaddr(server.host, server.port);
|
---|
[3232] | 666 | if (!(option_mask32 & WGET_OPT_QUIET)) {
|
---|
[2725] | 667 | char *s = xmalloc_sockaddr2dotted(&lsa->u.sa);
|
---|
| 668 | fprintf(stderr, "Connecting to %s (%s)\n", server.host, s);
|
---|
| 669 | free(s);
|
---|
| 670 | }
|
---|
| 671 | establish_session:
|
---|
[3232] | 672 | /*G.content_len = 0; - redundant, got_clen = 0 is enough */
|
---|
| 673 | G.got_clen = 0;
|
---|
| 674 | G.chunked = 0;
|
---|
[2725] | 675 | if (use_proxy || !target.is_ftp) {
|
---|
| 676 | /*
|
---|
| 677 | * HTTP session
|
---|
| 678 | */
|
---|
| 679 | char *str;
|
---|
| 680 | int status;
|
---|
| 681 |
|
---|
[3232] | 682 |
|
---|
[2725] | 683 | /* Open socket to http server */
|
---|
| 684 | sfp = open_socket(lsa);
|
---|
| 685 |
|
---|
| 686 | /* Send HTTP request */
|
---|
| 687 | if (use_proxy) {
|
---|
| 688 | fprintf(sfp, "GET %stp://%s/%s HTTP/1.1\r\n",
|
---|
| 689 | target.is_ftp ? "f" : "ht", target.host,
|
---|
| 690 | target.path);
|
---|
[1765] | 691 | } else {
|
---|
[3232] | 692 | if (option_mask32 & WGET_OPT_POST_DATA)
|
---|
[2725] | 693 | fprintf(sfp, "POST /%s HTTP/1.1\r\n", target.path);
|
---|
| 694 | else
|
---|
| 695 | fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
|
---|
[1765] | 696 | }
|
---|
[2725] | 697 |
|
---|
| 698 | fprintf(sfp, "Host: %s\r\nUser-Agent: %s\r\n",
|
---|
[3232] | 699 | target.host, G.user_agent);
|
---|
[2725] | 700 |
|
---|
[2859] | 701 | /* Ask server to close the connection as soon as we are done
|
---|
| 702 | * (IOW: we do not intend to send more requests)
|
---|
| 703 | */
|
---|
| 704 | fprintf(sfp, "Connection: close\r\n");
|
---|
| 705 |
|
---|
[2725] | 706 | #if ENABLE_FEATURE_WGET_AUTHENTICATION
|
---|
| 707 | if (target.user) {
|
---|
| 708 | fprintf(sfp, "Proxy-Authorization: Basic %s\r\n"+6,
|
---|
[3232] | 709 | base64enc(target.user));
|
---|
[2725] | 710 | }
|
---|
| 711 | if (use_proxy && server.user) {
|
---|
| 712 | fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
|
---|
[3232] | 713 | base64enc(server.user));
|
---|
[2725] | 714 | }
|
---|
| 715 | #endif
|
---|
| 716 |
|
---|
[3232] | 717 | if (G.beg_range != 0)
|
---|
[2725] | 718 | fprintf(sfp, "Range: bytes=%"OFF_FMT"u-\r\n", G.beg_range);
|
---|
[2859] | 719 |
|
---|
[2725] | 720 | #if ENABLE_FEATURE_WGET_LONG_OPTIONS
|
---|
[3232] | 721 | if (G.extra_headers)
|
---|
| 722 | fputs(G.extra_headers, sfp);
|
---|
[2725] | 723 |
|
---|
[3232] | 724 | if (option_mask32 & WGET_OPT_POST_DATA) {
|
---|
[2859] | 725 | fprintf(sfp,
|
---|
| 726 | "Content-Type: application/x-www-form-urlencoded\r\n"
|
---|
| 727 | "Content-Length: %u\r\n"
|
---|
| 728 | "\r\n"
|
---|
| 729 | "%s",
|
---|
[3232] | 730 | (int) strlen(G.post_data), G.post_data
|
---|
[2859] | 731 | );
|
---|
[2725] | 732 | } else
|
---|
| 733 | #endif
|
---|
[2859] | 734 | {
|
---|
| 735 | fprintf(sfp, "\r\n");
|
---|
[2725] | 736 | }
|
---|
| 737 |
|
---|
| 738 | fflush(sfp);
|
---|
| 739 |
|
---|
| 740 | /*
|
---|
| 741 | * Retrieve HTTP response line and check for "200" status code.
|
---|
| 742 | */
|
---|
| 743 | read_response:
|
---|
[3232] | 744 | fgets_and_trim(sfp);
|
---|
[2725] | 745 |
|
---|
[3232] | 746 | str = G.wget_buf;
|
---|
[2725] | 747 | str = skip_non_whitespace(str);
|
---|
| 748 | str = skip_whitespace(str);
|
---|
| 749 | // FIXME: no error check
|
---|
| 750 | // xatou wouldn't work: "200 OK"
|
---|
| 751 | status = atoi(str);
|
---|
| 752 | switch (status) {
|
---|
| 753 | case 0:
|
---|
| 754 | case 100:
|
---|
[3232] | 755 | while (gethdr(sfp) != NULL)
|
---|
[2725] | 756 | /* eat all remaining headers */;
|
---|
| 757 | goto read_response;
|
---|
| 758 | case 200:
|
---|
| 759 | /*
|
---|
| 760 | Response 204 doesn't say "null file", it says "metadata
|
---|
| 761 | has changed but data didn't":
|
---|
| 762 |
|
---|
| 763 | "10.2.5 204 No Content
|
---|
| 764 | The server has fulfilled the request but does not need to return
|
---|
| 765 | an entity-body, and might want to return updated metainformation.
|
---|
| 766 | The response MAY include new or updated metainformation in the form
|
---|
| 767 | of entity-headers, which if present SHOULD be associated with
|
---|
| 768 | the requested variant.
|
---|
| 769 |
|
---|
| 770 | If the client is a user agent, it SHOULD NOT change its document
|
---|
| 771 | view from that which caused the request to be sent. This response
|
---|
| 772 | is primarily intended to allow input for actions to take place
|
---|
| 773 | without causing a change to the user agent's active document view,
|
---|
| 774 | although any new or updated metainformation SHOULD be applied
|
---|
| 775 | to the document currently in the user agent's active view.
|
---|
| 776 |
|
---|
| 777 | The 204 response MUST NOT include a message-body, and thus
|
---|
| 778 | is always terminated by the first empty line after the header fields."
|
---|
| 779 |
|
---|
| 780 | However, in real world it was observed that some web servers
|
---|
| 781 | (e.g. Boa/0.94.14rc21) simply use code 204 when file size is zero.
|
---|
| 782 | */
|
---|
| 783 | case 204:
|
---|
[3232] | 784 | if (G.beg_range != 0) {
|
---|
| 785 | /* "Range:..." was not honored by the server.
|
---|
| 786 | * Restart download from the beginning.
|
---|
| 787 | */
|
---|
| 788 | reset_beg_range_to_zero();
|
---|
| 789 | }
|
---|
[2725] | 790 | break;
|
---|
| 791 | case 300: /* redirection */
|
---|
| 792 | case 301:
|
---|
| 793 | case 302:
|
---|
| 794 | case 303:
|
---|
| 795 | break;
|
---|
[3232] | 796 | case 206: /* Partial Content */
|
---|
| 797 | if (G.beg_range != 0)
|
---|
| 798 | /* "Range:..." worked. Good. */
|
---|
[2725] | 799 | break;
|
---|
[3232] | 800 | /* Partial Content even though we did not ask for it??? */
|
---|
[2725] | 801 | /* fall through */
|
---|
| 802 | default:
|
---|
[3232] | 803 | bb_error_msg_and_die("server returned error: %s", sanitize_string(G.wget_buf));
|
---|
[2725] | 804 | }
|
---|
| 805 |
|
---|
| 806 | /*
|
---|
| 807 | * Retrieve HTTP headers.
|
---|
| 808 | */
|
---|
[3232] | 809 | while ((str = gethdr(sfp)) != NULL) {
|
---|
| 810 | static const char keywords[] ALIGN1 =
|
---|
| 811 | "content-length\0""transfer-encoding\0""location\0";
|
---|
| 812 | enum {
|
---|
| 813 | KEY_content_length = 1, KEY_transfer_encoding, KEY_location
|
---|
| 814 | };
|
---|
| 815 | smalluint key;
|
---|
| 816 |
|
---|
[2725] | 817 | /* gethdr converted "FOO:" string to lowercase */
|
---|
[3232] | 818 |
|
---|
[2725] | 819 | /* strip trailing whitespace */
|
---|
| 820 | char *s = strchrnul(str, '\0') - 1;
|
---|
| 821 | while (s >= str && (*s == ' ' || *s == '\t')) {
|
---|
| 822 | *s = '\0';
|
---|
| 823 | s--;
|
---|
| 824 | }
|
---|
[3232] | 825 | key = index_in_strings(keywords, G.wget_buf) + 1;
|
---|
[2725] | 826 | if (key == KEY_content_length) {
|
---|
| 827 | G.content_len = BB_STRTOOFF(str, NULL, 10);
|
---|
| 828 | if (G.content_len < 0 || errno) {
|
---|
| 829 | bb_error_msg_and_die("content-length %s is garbage", sanitize_string(str));
|
---|
| 830 | }
|
---|
| 831 | G.got_clen = 1;
|
---|
| 832 | continue;
|
---|
| 833 | }
|
---|
| 834 | if (key == KEY_transfer_encoding) {
|
---|
[3232] | 835 | if (strcmp(str_tolower(str), "chunked") != 0)
|
---|
[2725] | 836 | bb_error_msg_and_die("transfer encoding '%s' is not supported", sanitize_string(str));
|
---|
[3232] | 837 | G.chunked = 1;
|
---|
[2725] | 838 | }
|
---|
| 839 | if (key == KEY_location && status >= 300) {
|
---|
| 840 | if (--redir_limit == 0)
|
---|
| 841 | bb_error_msg_and_die("too many redirections");
|
---|
| 842 | fclose(sfp);
|
---|
[3232] | 843 | if (str[0] == '/') {
|
---|
| 844 | free(redirected_path);
|
---|
| 845 | target.path = redirected_path = xstrdup(str+1);
|
---|
[2725] | 846 | /* lsa stays the same: it's on the same server */
|
---|
[3232] | 847 | } else {
|
---|
[2725] | 848 | parse_url(str, &target);
|
---|
| 849 | if (!use_proxy) {
|
---|
[3232] | 850 | free(server.allocated);
|
---|
| 851 | server.allocated = NULL;
|
---|
[2725] | 852 | server.host = target.host;
|
---|
| 853 | /* strip_ipv6_scope_id(target.host); - no! */
|
---|
| 854 | /* we assume remote never gives us IPv6 addr with scope id */
|
---|
| 855 | server.port = target.port;
|
---|
| 856 | free(lsa);
|
---|
| 857 | goto resolve_lsa;
|
---|
| 858 | } /* else: lsa stays the same: we use proxy */
|
---|
| 859 | }
|
---|
| 860 | goto establish_session;
|
---|
| 861 | }
|
---|
| 862 | }
|
---|
| 863 | // if (status >= 300)
|
---|
| 864 | // bb_error_msg_and_die("bad redirection (no Location: header from server)");
|
---|
| 865 |
|
---|
| 866 | /* For HTTP, data is pumped over the same connection */
|
---|
| 867 | dfp = sfp;
|
---|
| 868 |
|
---|
| 869 | } else {
|
---|
| 870 | /*
|
---|
| 871 | * FTP session
|
---|
| 872 | */
|
---|
| 873 | sfp = prepare_ftp_session(&dfp, &target, lsa);
|
---|
[821] | 874 | }
|
---|
| 875 |
|
---|
[3232] | 876 | free(lsa);
|
---|
[821] | 877 |
|
---|
[3232] | 878 | if (!(option_mask32 & WGET_OPT_SPIDER)) {
|
---|
| 879 | if (G.output_fd < 0)
|
---|
| 880 | G.output_fd = xopen(G.fname_out, G.o_flags);
|
---|
| 881 | retrieve_file_data(dfp);
|
---|
| 882 | if (!(option_mask32 & WGET_OPT_OUTNAME)) {
|
---|
| 883 | xclose(G.output_fd);
|
---|
| 884 | G.output_fd = -1;
|
---|
| 885 | }
|
---|
[2725] | 886 | }
|
---|
[821] | 887 |
|
---|
[2725] | 888 | if (dfp != sfp) {
|
---|
[3232] | 889 | /* It's ftp. Close data connection properly */
|
---|
[2725] | 890 | fclose(dfp);
|
---|
[3232] | 891 | if (ftpcmd(NULL, NULL, sfp) != 226)
|
---|
| 892 | bb_error_msg_and_die("ftp error: %s", sanitize_string(G.wget_buf + 4));
|
---|
| 893 | /* ftpcmd("QUIT", NULL, sfp); - why bother? */
|
---|
[2725] | 894 | }
|
---|
[3232] | 895 | fclose(sfp);
|
---|
[2725] | 896 |
|
---|
[3232] | 897 | free(server.allocated);
|
---|
| 898 | free(target.allocated);
|
---|
| 899 | free(fname_out_alloc);
|
---|
| 900 | free(redirected_path);
|
---|
| 901 | }
|
---|
| 902 |
|
---|
| 903 | int wget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 904 | int wget_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 905 | {
|
---|
| 906 | #if ENABLE_FEATURE_WGET_LONG_OPTIONS
|
---|
| 907 | static const char wget_longopts[] ALIGN1 =
|
---|
| 908 | /* name, has_arg, val */
|
---|
| 909 | "continue\0" No_argument "c"
|
---|
| 910 | //FIXME: -s isn't --spider, it's --save-headers!
|
---|
| 911 | "spider\0" No_argument "s"
|
---|
| 912 | "quiet\0" No_argument "q"
|
---|
| 913 | "output-document\0" Required_argument "O"
|
---|
| 914 | "directory-prefix\0" Required_argument "P"
|
---|
| 915 | "proxy\0" Required_argument "Y"
|
---|
| 916 | "user-agent\0" Required_argument "U"
|
---|
| 917 | #if ENABLE_FEATURE_WGET_TIMEOUT
|
---|
| 918 | "timeout\0" Required_argument "T"
|
---|
| 919 | #endif
|
---|
| 920 | /* Ignored: */
|
---|
| 921 | // "tries\0" Required_argument "t"
|
---|
| 922 | /* Ignored (we always use PASV): */
|
---|
| 923 | "passive-ftp\0" No_argument "\xff"
|
---|
| 924 | "header\0" Required_argument "\xfe"
|
---|
| 925 | "post-data\0" Required_argument "\xfd"
|
---|
| 926 | /* Ignored (we don't do ssl) */
|
---|
| 927 | "no-check-certificate\0" No_argument "\xfc"
|
---|
| 928 | /* Ignored (we don't support caching) */
|
---|
| 929 | "no-cache\0" No_argument "\xfb"
|
---|
| 930 | ;
|
---|
| 931 | #endif
|
---|
| 932 |
|
---|
| 933 | #if ENABLE_FEATURE_WGET_LONG_OPTIONS
|
---|
| 934 | llist_t *headers_llist = NULL;
|
---|
| 935 | #endif
|
---|
| 936 |
|
---|
| 937 | INIT_G();
|
---|
| 938 |
|
---|
| 939 | IF_FEATURE_WGET_TIMEOUT(G.timeout_seconds = 900;)
|
---|
| 940 | G.proxy_flag = "on"; /* use proxies if env vars are set */
|
---|
| 941 | G.user_agent = "Wget"; /* "User-Agent" header field */
|
---|
| 942 |
|
---|
| 943 | #if ENABLE_FEATURE_WGET_LONG_OPTIONS
|
---|
| 944 | applet_long_options = wget_longopts;
|
---|
| 945 | #endif
|
---|
| 946 | opt_complementary = "-1" IF_FEATURE_WGET_TIMEOUT(":T+") IF_FEATURE_WGET_LONG_OPTIONS(":\xfe::");
|
---|
| 947 | getopt32(argv, "csqO:P:Y:U:T:" /*ignored:*/ "t:",
|
---|
| 948 | &G.fname_out, &G.dir_prefix,
|
---|
| 949 | &G.proxy_flag, &G.user_agent,
|
---|
| 950 | IF_FEATURE_WGET_TIMEOUT(&G.timeout_seconds) IF_NOT_FEATURE_WGET_TIMEOUT(NULL),
|
---|
| 951 | NULL /* -t RETRIES */
|
---|
| 952 | IF_FEATURE_WGET_LONG_OPTIONS(, &headers_llist)
|
---|
| 953 | IF_FEATURE_WGET_LONG_OPTIONS(, &G.post_data)
|
---|
| 954 | );
|
---|
| 955 | argv += optind;
|
---|
| 956 |
|
---|
| 957 | #if ENABLE_FEATURE_WGET_LONG_OPTIONS
|
---|
| 958 | if (headers_llist) {
|
---|
| 959 | int size = 1;
|
---|
| 960 | char *cp;
|
---|
| 961 | llist_t *ll = headers_llist;
|
---|
| 962 | while (ll) {
|
---|
| 963 | size += strlen(ll->data) + 2;
|
---|
| 964 | ll = ll->link;
|
---|
| 965 | }
|
---|
| 966 | G.extra_headers = cp = xmalloc(size);
|
---|
| 967 | while (headers_llist) {
|
---|
| 968 | cp += sprintf(cp, "%s\r\n", (char*)llist_pop(&headers_llist));
|
---|
| 969 | }
|
---|
| 970 | }
|
---|
| 971 | #endif
|
---|
| 972 |
|
---|
| 973 | G.output_fd = -1;
|
---|
| 974 | G.o_flags = O_WRONLY | O_CREAT | O_TRUNC | O_EXCL;
|
---|
| 975 | if (G.fname_out) { /* -O FILE ? */
|
---|
| 976 | if (LONE_DASH(G.fname_out)) { /* -O - ? */
|
---|
| 977 | G.output_fd = 1;
|
---|
| 978 | option_mask32 &= ~WGET_OPT_CONTINUE;
|
---|
| 979 | }
|
---|
| 980 | /* compat with wget: -O FILE can overwrite */
|
---|
| 981 | G.o_flags = O_WRONLY | O_CREAT | O_TRUNC;
|
---|
| 982 | }
|
---|
| 983 |
|
---|
| 984 | while (*argv)
|
---|
| 985 | download_one_url(*argv++);
|
---|
| 986 |
|
---|
| 987 | if (G.output_fd >= 0)
|
---|
| 988 | xclose(G.output_fd);
|
---|
| 989 |
|
---|
[2725] | 990 | return EXIT_SUCCESS;
|
---|
| 991 | }
|
---|