X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fwget.c;h=41b4e30af69952e86681b60d8506e7e30f96b0ec;hb=85dd4b3b272793502b513d0d54b546c741ad1a5d;hp=5bec0ddd5a918dd9d5a31a981e665ee0b56395bd;hpb=79757c9c37beab0032bc065b10bf84d4afe2b500;p=oweals%2Fbusybox.git diff --git a/networking/wget.c b/networking/wget.c index 5bec0ddd5..41b4e30af 100644 --- a/networking/wget.c +++ b/networking/wget.c @@ -4,14 +4,6 @@ * * Chip Rosenthal Covad Communications * - * Note: According to RFC2616 section 3.6.1, "All HTTP/1.1 applications MUST be - * able to receive and decode the "chunked" transfer-coding, and MUST ignore - * chunk-extension extensions they do not understand." - * - * This prevents this particular wget app from completely RFC compliant, and as - * such, prevents it from being used as a general purpose web browser... This - * is a design decision, since it makes the code smaller. - * */ #include @@ -32,6 +24,11 @@ #include #include +#ifndef _GNU_SOURCE +#define _GNU_SOURCE +#endif +#include + #include "busybox.h" /* Stupid libc5 doesn't define this... */ @@ -59,14 +56,15 @@ static void parse_url(char *url, struct host_info *h); static FILE *open_socket(char *host, int port); static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc); static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf); -static void progressmeter(int flag); /* Globals (can be accessed from signal handlers */ static off_t filesize = 0; /* content-length of the file */ -#ifdef BB_FEATURE_WGET_STATUSBAR +static int chunked = 0; /* chunked transfer encoding */ +#ifdef CONFIG_FEATURE_WGET_STATUSBAR +static void progressmeter(int flag); static char *curfile; /* Name of current file being transferred. */ static struct timeval start; /* Time a transfer started. */ -static volatile unsigned long statbytes; /* Number of bytes transferred so far. */ +static volatile unsigned long statbytes = 0; /* Number of bytes transferred so far. */ /* For progressmeter() -- number of seconds before xfer considered "stalled" */ static const int STALLTIME = 5; #endif @@ -79,12 +77,56 @@ static void close_and_delete_outfile(FILE* output, char *fname_out, int do_conti } } +/* Read NMEMB elements of SIZE bytes into PTR from STREAM. Returns the + * number of elements read, and a short count if an eof or non-interrupt + * error is encountered. */ +static size_t safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream) +{ + size_t ret = 0; + + do { + clearerr(stream); + ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream); + } while (ret < nmemb && ferror(stream) && errno == EINTR); + + return ret; +} + +/* Write NMEMB elements of SIZE bytes from PTR to STREAM. Returns the + * number of elements written, and a short count if an eof or non-interrupt + * error is encountered. */ +static size_t safe_fwrite(void *ptr, size_t size, size_t nmemb, FILE *stream) +{ + size_t ret = 0; + + do { + clearerr(stream); + ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream); + } while (ret < nmemb && ferror(stream) && errno == EINTR); + + return ret; +} + +/* 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; +} + #define close_delete_and_die(s...) { \ close_and_delete_outfile(output, fname_out, do_continue); \ error_msg_and_die(s); } -#ifdef BB_FEATURE_WGET_AUTHENTICATION +#ifdef CONFIG_FEATURE_WGET_AUTHENTICATION /* * Base64-encode character string * oops... isn't something similar in uuencode.c? @@ -118,9 +160,13 @@ int wget_main(int argc, char **argv) int n, try=5, status; int port; char *proxy; + char *dir_prefix=NULL; char *s, buf[512]; struct stat sbuf; - + char extra_headers[1024]; + char *extra_headers_ptr = extra_headers; + int extra_headers_left = sizeof(extra_headers); + int which_long_opt = 0, option_index = -1; struct host_info server, target; FILE *sfp = NULL; /* socket to web/ftp server */ @@ -132,14 +178,25 @@ int wget_main(int argc, char **argv) FILE *output; /* socket to web server */ int quiet_flag = FALSE; /* Be verry, verry quiet... */ +#define LONG_HEADER 1 + struct option long_options[] = { + { "continue", 0, NULL, 'c' }, + { "quiet", 0, NULL, 'q' }, + { "output-document", 1, NULL, 'O' }, + { "header", 1, &which_long_opt, LONG_HEADER }, + { 0, 0, 0, 0 } + }; /* * Crack command line. */ - while ((n = getopt(argc, argv, "cqO:")) != EOF) { + while ((n = getopt_long(argc, argv, "cqO:P:", long_options, &option_index)) != EOF) { switch (n) { case 'c': ++do_continue; break; + case 'P': + dir_prefix = optarg; + break; case 'q': quiet_flag = TRUE; break; @@ -148,7 +205,23 @@ int wget_main(int argc, char **argv) * this gets interpreted as the auto-gen output filename * case below - tausq@debian.org */ - fname_out = (strcmp(optarg, "-") == 0 ? (char *)1 : optarg); + fname_out = optarg; + break; + case 0: + switch (which_long_opt) { + case LONG_HEADER: { + int arglen = strlen(optarg); + if(extra_headers_left - arglen - 2 <= 0) + error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen); + strcpy(extra_headers_ptr, optarg); + extra_headers_ptr += arglen; + extra_headers_left -= ( arglen + 2 ); + *extra_headers_ptr++ = '\r'; + *extra_headers_ptr++ = '\n'; + *(extra_headers_ptr + 1) = 0; + break; + } + } break; default: show_usage(); @@ -172,18 +245,20 @@ int wget_main(int argc, char **argv) /* Guess an output filename */ if (!fname_out) { fname_out = -#ifdef BB_FEATURE_WGET_STATUSBAR +#ifdef CONFIG_FEATURE_WGET_STATUSBAR curfile = #endif get_last_path_component(target.path); if (fname_out==NULL || strlen(fname_out)<1) { fname_out = -#ifdef BB_FEATURE_WGET_STATUSBAR +#ifdef CONFIG_FEATURE_WGET_STATUSBAR curfile = #endif "index.html"; } -#ifdef BB_FEATURE_WGET_STATUSBAR + if (dir_prefix != NULL) + fname_out = concat_path_file(dir_prefix, fname_out); +#ifdef CONFIG_FEATURE_WGET_STATUSBAR } else { curfile = get_last_path_component(fname_out); #endif @@ -195,10 +270,11 @@ int wget_main(int argc, char **argv) /* * Open the output file stream. */ - if (fname_out != (char *)1) { - output = xfopen( fname_out, (do_continue ? "a" : "w") ); - } else { + if (strcmp(fname_out, "-") == 0) { output = stdout; + quiet_flag = TRUE; + } else { + output = xfopen(fname_out, (do_continue ? "a" : "w")); } /* @@ -231,16 +307,16 @@ int wget_main(int argc, char **argv) * Send HTTP request. */ if (proxy) { - fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.0\r\n", + fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n", target.is_ftp ? "f" : "ht", target.host, target.port, target.path); } else { - fprintf(sfp, "GET /%s HTTP/1.0\r\n", target.path); + fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path); } fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host); -#ifdef BB_FEATURE_WGET_AUTHENTICATION +#ifdef CONFIG_FEATURE_WGET_AUTHENTICATION if (target.user) { fprintf(sfp, "Authorization: Basic %s\r\n", base64enc(target.user, buf, sizeof(buf))); @@ -253,12 +329,14 @@ int wget_main(int argc, char **argv) if (do_continue) fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range); + if(extra_headers_left < sizeof(extra_headers)) + fputs(extra_headers,sfp); fprintf(sfp,"Connection: close\r\n\r\n"); /* * Retrieve HTTP response line and check for "200" status code. */ - if (fgets(buf, sizeof(buf), sfp) == NULL) +read_response: if (fgets(buf, sizeof(buf), sfp) == NULL) close_delete_and_die("no response from server"); for (s = buf ; *s != '\0' && !isspace(*s) ; ++s) @@ -267,6 +345,9 @@ int wget_main(int argc, char **argv) ; switch (status = atoi(s)) { case 0: + case 100: + while (gethdr(buf, sizeof(buf), sfp, &n) != NULL); + goto read_response; case 200: if (do_continue && output != stdout) output = freopen(fname_out, "w", output); @@ -295,9 +376,13 @@ int wget_main(int argc, char **argv) got_clen = 1; continue; } - if (strcasecmp(buf, "transfer-encoding") == 0) + if (strcasecmp(buf, "transfer-encoding") == 0) { + if (strcasecmp(s, "chunked") == 0) { + chunked = got_clen = 1; + } else { close_delete_and_die("server wants to do %s transfer encoding", s); - + } + } if (strcasecmp(buf, "location") == 0) { if (s[0] == '/') target.path = xstrdup(s+1); @@ -386,32 +471,44 @@ int wget_main(int argc, char **argv) /* * Retrieve file */ -#ifdef BB_FEATURE_WGET_STATUSBAR - statbytes=0; + if (chunked) { + fgets(buf, sizeof(buf), dfp); + filesize = strtol(buf, (char **) NULL, 16); + } +#ifdef CONFIG_FEATURE_WGET_STATUSBAR if (quiet_flag==FALSE) progressmeter(-1); #endif - while ((filesize > 0 || !got_clen) && (n = fread(buf, 1, sizeof(buf), dfp)) > 0) { - fwrite(buf, 1, n, output); -#ifdef BB_FEATURE_WGET_STATUSBAR + do { + while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) { + safe_fwrite(buf, 1, n, output); +#ifdef CONFIG_FEATURE_WGET_STATUSBAR statbytes+=n; - if (quiet_flag==FALSE) - progressmeter(1); #endif if (got_clen) filesize -= n; } + if (chunked) { + safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */ + safe_fgets(buf, sizeof(buf), dfp); + filesize = strtol(buf, (char **) NULL, 16); + if (filesize==0) chunked = 0; /* all done! */ + } + if (n == 0 && ferror(dfp)) perror_msg_and_die("network read error"); - + } while (chunked); +#ifdef CONFIG_FEATURE_WGET_STATUSBAR + if (quiet_flag==FALSE) + progressmeter(1); +#endif if (!proxy && target.is_ftp) { fclose(dfp); if (ftpcmd(NULL, NULL, sfp, buf) != 226) error_msg_and_die("ftp error: %s", buf+4); ftpcmd("QUIT", NULL, sfp, buf); } - exit(EXIT_SUCCESS); } @@ -464,8 +561,7 @@ FILE *open_socket(char *host, int port) memset(&s_in, 0, sizeof(s_in)); s_in.sin_family = AF_INET; - if ((hp = (struct hostent *) gethostbyname(host)) == NULL) - error_msg_and_die("cannot resolve %s", host); + hp = xgethostbyname(host); memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length); s_in.sin_port = htons(port); @@ -549,7 +645,7 @@ static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf) return atoi(buf); } -#ifdef BB_FEATURE_WGET_STATUSBAR +#ifdef CONFIG_FEATURE_WGET_STATUSBAR /* Stuff below is from BSD rcp util.c, as added to openshh. * Original copyright notice is retained at the end of this file. * @@ -593,7 +689,7 @@ progressmeter(int flag) { static const char prefixes[] = " KMGTP"; static struct timeval lastupdate; - static off_t lastsize; + static off_t lastsize, totalsize; struct timeval now, td, wait; off_t cursize, abbrevsize; double elapsed; @@ -604,12 +700,13 @@ progressmeter(int flag) (void) gettimeofday(&start, (struct timezone *) 0); lastupdate = start; lastsize = 0; + totalsize = filesize; /* as filesize changes.. */ } (void) gettimeofday(&now, (struct timezone *) 0); cursize = statbytes; - if (filesize != 0) { - ratio = 100.0 * cursize / filesize; + if (totalsize != 0 && !chunked) { + ratio = 100.0 * cursize / totalsize; ratio = MAX(ratio, 0); ratio = MIN(ratio, 100); } else @@ -649,14 +746,14 @@ progressmeter(int flag) timersub(&now, &start, &td); elapsed = td.tv_sec + (td.tv_usec / 1000000.0); - if (statbytes <= 0 || elapsed <= 0.0 || cursize > filesize) { - snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), - " --:-- ETA"); - } else if (wait.tv_sec >= STALLTIME) { + if (wait.tv_sec >= STALLTIME) { snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " - stalled -"); + } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) { + snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), + " --:-- ETA"); } else { - remaining = (int) (filesize / (statbytes / elapsed) - elapsed); + remaining = (int) (totalsize / (statbytes / elapsed) - elapsed); i = remaining / 3600; if (i) snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), @@ -680,11 +777,12 @@ progressmeter(int flag) } else if (flag == 1) { alarmtimer(0); statbytes = 0; + putc('\n', stderr); } } #endif -/* Original copyright notice which applies to the BB_FEATURE_WGET_STATUSBAR stuff, +/* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff, * much of which was blatently stolen from openssh. */ /*- @@ -719,7 +817,7 @@ progressmeter(int flag) * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: wget.c,v 1.31 2001/04/05 21:45:53 andersen Exp $ + * $Id: wget.c,v 1.46 2001/10/24 04:59:56 andersen Exp $ */