diff options
| -rw-r--r-- | networking/wget.c | 289 |
1 files changed, 160 insertions, 129 deletions
diff --git a/networking/wget.c b/networking/wget.c index 45d428b..76bd5e2 100644 --- a/networking/wget.c +++ b/networking/wget.c @@ -15,8 +15,7 @@ struct host_info { - // May be used if we ever will want to free() all xstrdup()s... - /* char *allocated; */ + char *allocated; const char *path; const char *user; char *host; @@ -34,6 +33,14 @@ struct globals { 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; +#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; #endif @@ -87,6 +94,7 @@ static void progress_meter(int flag) G.chunked ? 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; } @@ -242,11 +250,12 @@ static int ftpcmd(const char *s1, const char *s2, FILE *fp) return result; } -static void parse_url(char *src_url, struct host_info *h) +static void parse_url(const char *src_url, struct host_info *h) { char *url, *p, *sp; - /* h->allocated = */ url = xstrdup(src_url); + free(h->allocated); + h->allocated = url = xstrdup(src_url); if (strncmp(url, "http://", 7) == 0) { h->port = bb_lookup_port("http", "tcp", 80); @@ -571,103 +580,36 @@ static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd) G.got_clen = 1; } - G.chunked = 0; /* make progress meter show 100% even for chunked */ + /* Draw full bar and free its resources */ + G.chunked = 0; /* makes it show 100% even for chunked download */ progress_meter(PROGRESS_END); } -int wget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int wget_main(int argc UNUSED_PARAM, char **argv) +static int download_one_url(const char *url) { - struct host_info server, target; - len_and_sockaddr *lsa; - unsigned opt; + bool use_proxy; /* Use proxies if env vars are set */ int redir_limit; - char *proxy = NULL; - char *dir_prefix = NULL; -#if ENABLE_FEATURE_WGET_LONG_OPTIONS - char *post_data; - char *extra_headers = NULL; - llist_t *headers_llist = NULL; -#endif + int output_fd; + len_and_sockaddr *lsa; FILE *sfp; /* socket to web/ftp server */ FILE *dfp; /* socket to ftp server (data) */ - char *fname_out; /* where to direct output (-O) */ - int output_fd = -1; - bool use_proxy; /* 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 - }; -#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" -#if ENABLE_FEATURE_WGET_TIMEOUT - "timeout\0" Required_argument "T" -#endif - /* Ignored: */ - // "tries\0" Required_argument "t" - /* Ignored (we always use PASV): */ - "passive-ftp\0" No_argument "\xff" - "header\0" Required_argument "\xfe" - "post-data\0" Required_argument "\xfd" - /* Ignored (we don't do ssl) */ - "no-check-certificate\0" No_argument "\xfc" - ; -#endif - - INIT_G(); - -#if ENABLE_FEATURE_WGET_LONG_OPTIONS - applet_long_options = wget_longopts; -#endif - /* server.allocated = target.allocated = NULL; */ - opt_complementary = "-1" IF_FEATURE_WGET_TIMEOUT(":T+") IF_FEATURE_WGET_LONG_OPTIONS(":\xfe::"); - opt = getopt32(argv, "csqO:P:Y:U:T:" /*ignored:*/ "t:", - &fname_out, &dir_prefix, - &proxy_flag, &user_agent, - IF_FEATURE_WGET_TIMEOUT(&G.timeout_seconds) IF_NOT_FEATURE_WGET_TIMEOUT(NULL), - NULL /* -t RETRIES */ - IF_FEATURE_WGET_LONG_OPTIONS(, &headers_llist) - IF_FEATURE_WGET_LONG_OPTIONS(, &post_data) - ); -#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 - - /* TODO: compat issue: should handle "wget URL1 URL2..." */ + char *proxy = NULL; + char *fname_out_alloc; + struct host_info server; + struct host_info target; + server.allocated = NULL; + target.allocated = NULL; + server.user = NULL; target.user = NULL; - parse_url(argv[optind], &target); + + parse_url(url, &target); /* Use the proxy if necessary */ - use_proxy = (strcmp(proxy_flag, "off") != 0); + use_proxy = (strcmp(G.proxy_flag, "off") != 0); if (use_proxy) { proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy"); if (proxy && proxy[0]) { - server.user = NULL; parse_url(proxy, &server); } else { use_proxy = 0; @@ -676,7 +618,8 @@ int wget_main(int argc UNUSED_PARAM, char **argv) if (!use_proxy) { server.port = target.port; if (ENABLE_FEATURE_IPV6) { - server.host = xstrdup(target.host); + //free(server.allocated); - can't be non-NULL + server.host = server.allocated = xstrdup(target.host); } else { server.host = target.host; } @@ -685,34 +628,31 @@ int wget_main(int argc UNUSED_PARAM, char **argv) if (ENABLE_FEATURE_IPV6) strip_ipv6_scope_id(target.host); - /* 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); + /* If there was no -O FILE, guess output filename */ + output_fd = -1; + fname_out_alloc = NULL; + if (!G.fname_out) { + G.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"; + 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 (dir_prefix) - fname_out = concat_path_file(dir_prefix, fname_out); + if (G.dir_prefix) + G.fname_out = fname_out_alloc = concat_path_file(G.dir_prefix, G.fname_out); } else { - if (LONE_DASH(fname_out)) { + if (LONE_DASH(G.fname_out)) { /* -O - */ output_fd = 1; - opt &= ~WGET_OPT_CONTINUE; + option_mask32 &= ~WGET_OPT_CONTINUE; } } #if ENABLE_FEATURE_WGET_STATUSBAR - G.curfile = bb_get_last_path_component_nostrip(fname_out); + G.curfile = bb_get_last_path_component_nostrip(G.fname_out); #endif - /* Impossible? - if ((opt & WGET_OPT_CONTINUE) && !fname_out) - bb_error_msg_and_die("can't 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 (option_mask32 & WGET_OPT_CONTINUE) { + output_fd = open(G.fname_out, O_WRONLY); if (output_fd >= 0) { G.beg_range = xlseek(output_fd, 0, SEEK_END); } @@ -723,12 +663,13 @@ int wget_main(int argc UNUSED_PARAM, char **argv) redir_limit = 5; resolve_lsa: lsa = xhost2sockaddr(server.host, server.port); - if (!(opt & WGET_OPT_QUIET)) { + 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.chunked = G.got_clen = 0; if (use_proxy || !target.is_ftp) { /* * HTTP session @@ -736,6 +677,7 @@ int wget_main(int argc UNUSED_PARAM, char **argv) char *str; int status; + /* Open socket to http server */ sfp = open_socket(lsa); @@ -745,14 +687,14 @@ int wget_main(int argc UNUSED_PARAM, char **argv) target.is_ftp ? "f" : "ht", target.host, target.path); } else { - if (opt & WGET_OPT_POST_DATA) + if (option_mask32 & WGET_OPT_POST_DATA) fprintf(sfp, "POST /%s HTTP/1.1\r\n", 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); + target.host, G.user_agent); /* Ask server to close the connection as soon as we are done * (IOW: we do not intend to send more requests) @@ -774,11 +716,11 @@ int wget_main(int argc UNUSED_PARAM, char **argv) fprintf(sfp, "Range: bytes=%"OFF_FMT"u-\r\n", G.beg_range); #if ENABLE_FEATURE_WGET_LONG_OPTIONS - if (extra_headers) - fputs(extra_headers, sfp); + if (G.extra_headers) + fputs(G.extra_headers, sfp); - if (opt & WGET_OPT_POST_DATA) { - char *estr = URL_escape(post_data); + if (option_mask32 & WGET_OPT_POST_DATA) { + char *estr = URL_escape(G.post_data); fprintf(sfp, "Content-Type: application/x-www-form-urlencoded\r\n" "Content-Length: %u\r\n" @@ -810,7 +752,7 @@ int wget_main(int argc UNUSED_PARAM, char **argv) switch (status) { case 0: case 100: - while (gethdr(sfp /*, &n*/) != NULL) + while (gethdr(sfp) != NULL) /* eat all remaining headers */; goto read_response; case 200: @@ -856,9 +798,16 @@ However, in real world it was observed that some web servers /* * Retrieve HTTP headers. */ - while ((str = gethdr(sfp /*, &n*/)) != NULL) { - /* gethdr converted "FOO:" string to lowercase */ + 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')) { @@ -875,23 +824,22 @@ However, in real world it was observed that some web servers continue; } if (key == KEY_transfer_encoding) { - if (index_in_strings(keywords, str_tolower(str)) + 1 != KEY_chunked) + if (strcmp(str_tolower(str), "chunked") != 0) bb_error_msg_and_die("transfer encoding '%s' is not supported", sanitize_string(str)); - G.chunked = G.got_clen = 1; + G.chunked = 1; } if (key == KEY_location && status >= 300) { if (--redir_limit == 0) bb_error_msg_and_die("too many redirections"); fclose(sfp); - G.got_clen = 0; - G.chunked = 0; - if (str[0] == '/') - /* free(target.allocated); */ - target.path = /* target.allocated = */ xstrdup(str+1); + if (str[0] == '/') { + free(target.allocated); + target.path = target.allocated = xstrdup(str+1); /* lsa stays the same: it's on the same server */ - else { + } else { parse_url(str, &target); if (!use_proxy) { + free(server.allocated); server.host = target.host; /* strip_ipv6_scope_id(target.host); - no! */ /* we assume remote never gives us IPv6 addr with scope id */ @@ -916,30 +864,113 @@ However, in real world it was observed that some web servers sfp = prepare_ftp_session(&dfp, &target, lsa); } - if (opt & WGET_OPT_SPIDER) { - if (ENABLE_FEATURE_CLEAN_UP) - fclose(sfp); + free(lsa); + free(server.allocated); + free(target.allocated); + + if (option_mask32 & WGET_OPT_SPIDER) { + free(fname_out_alloc); + fclose(sfp); return EXIT_SUCCESS; } 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) + if (option_mask32 & WGET_OPT_OUTNAME) o_flags = O_WRONLY | O_CREAT | O_TRUNC; - output_fd = xopen(fname_out, o_flags); + output_fd = xopen(G.fname_out, o_flags); } + free(fname_out_alloc); + retrieve_file_data(dfp, output_fd); xclose(output_fd); if (dfp != sfp) { - /* It's ftp. Close it properly */ + /* 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); return EXIT_SUCCESS; } + +int wget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int wget_main(int argc UNUSED_PARAM, char **argv) +{ +#if ENABLE_FEATURE_WGET_LONG_OPTIONS + static const char wget_longopts[] ALIGN1 = + /* name, has_arg, val */ + "continue\0" No_argument "c" +//FIXME: -s isn't --spider, it's --save-headers! + "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" +#if ENABLE_FEATURE_WGET_TIMEOUT + "timeout\0" Required_argument "T" +#endif + /* Ignored: */ + // "tries\0" Required_argument "t" + /* Ignored (we always use PASV): */ + "passive-ftp\0" No_argument "\xff" + "header\0" Required_argument "\xfe" + "post-data\0" Required_argument "\xfd" + /* Ignored (we don't do ssl) */ + "no-check-certificate\0" No_argument "\xfc" + ; +#endif + + int exitcode; +#if ENABLE_FEATURE_WGET_LONG_OPTIONS + llist_t *headers_llist = NULL; +#endif + + INIT_G(); + + IF_FEATURE_WGET_TIMEOUT(G.timeout_seconds = 900;) + G.proxy_flag = "on"; /* use proxies if env vars are set */ + G.user_agent = "Wget"; /* "User-Agent" header field */ + +#if ENABLE_FEATURE_WGET_LONG_OPTIONS + applet_long_options = wget_longopts; +#endif + opt_complementary = "-1" IF_FEATURE_WGET_TIMEOUT(":T+") IF_FEATURE_WGET_LONG_OPTIONS(":\xfe::"); + getopt32(argv, "csqO:P:Y:U:T:" /*ignored:*/ "t:", + &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 */ + IF_FEATURE_WGET_LONG_OPTIONS(, &headers_llist) + IF_FEATURE_WGET_LONG_OPTIONS(, &G.post_data) + ); + argv += optind; + +#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; + } + G.extra_headers = cp = xmalloc(size); + while (headers_llist) { + cp += sprintf(cp, "%s\r\n", (char*)llist_pop(&headers_llist)); + } + } +#endif + + exitcode = 0; + while (*argv) + exitcode |= download_one_url(*argv++); + + return exitcode; +} |