http.c revision 106044
137535Sdes/*- 263012Sdes * Copyright (c) 2000 Dag-Erling Co�dan Sm�rgrav 337535Sdes * All rights reserved. 437535Sdes * 537535Sdes * Redistribution and use in source and binary forms, with or without 637535Sdes * modification, are permitted provided that the following conditions 737535Sdes * are met: 837535Sdes * 1. Redistributions of source code must retain the above copyright 937535Sdes * notice, this list of conditions and the following disclaimer 1037535Sdes * in this position and unchanged. 1137535Sdes * 2. Redistributions in binary form must reproduce the above copyright 1237535Sdes * notice, this list of conditions and the following disclaimer in the 1337535Sdes * documentation and/or other materials provided with the distribution. 1437535Sdes * 3. The name of the author may not be used to endorse or promote products 1563012Sdes * derived from this software without specific prior written permission. 1637535Sdes * 1737535Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1837535Sdes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1937535Sdes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2037535Sdes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2137535Sdes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2237535Sdes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2337535Sdes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2437535Sdes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2537535Sdes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2637535Sdes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2737535Sdes */ 2837535Sdes 2984203Sdillon#include <sys/cdefs.h> 3084203Sdillon__FBSDID("$FreeBSD: head/lib/libfetch/http.c 106044 2002-10-27 15:43:40Z des $"); 3184203Sdillon 3263236Sdes/* 3363236Sdes * The following copyright applies to the base64 code: 3463236Sdes * 3563236Sdes *- 3663236Sdes * Copyright 1997 Massachusetts Institute of Technology 3763236Sdes * 3863236Sdes * Permission to use, copy, modify, and distribute this software and 3963236Sdes * its documentation for any purpose and without fee is hereby 4063236Sdes * granted, provided that both the above copyright notice and this 4163236Sdes * permission notice appear in all copies, that both the above 4263236Sdes * copyright notice and this permission notice appear in all 4363236Sdes * supporting documentation, and that the name of M.I.T. not be used 4463236Sdes * in advertising or publicity pertaining to distribution of the 4563236Sdes * software without specific, written prior permission. M.I.T. makes 4663236Sdes * no representations about the suitability of this software for any 4763236Sdes * purpose. It is provided "as is" without express or implied 4863236Sdes * warranty. 4990267Sdes * 5063236Sdes * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 5163236Sdes * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 5263236Sdes * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 5363236Sdes * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 5463236Sdes * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 5563236Sdes * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 5663236Sdes * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 5763236Sdes * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 5863236Sdes * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 5963236Sdes * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 6063236Sdes * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6163236Sdes * SUCH DAMAGE. 6263236Sdes */ 6363236Sdes 6437535Sdes#include <sys/param.h> 6560737Sume#include <sys/socket.h> 6637535Sdes 6763012Sdes#include <ctype.h> 6837535Sdes#include <err.h> 6963012Sdes#include <errno.h> 7060376Sdes#include <locale.h> 7160189Sdes#include <netdb.h> 7237608Sdes#include <stdarg.h> 7337535Sdes#include <stdio.h> 7437535Sdes#include <stdlib.h> 7537535Sdes#include <string.h> 7660376Sdes#include <time.h> 7737535Sdes#include <unistd.h> 7837535Sdes 7937535Sdes#include "fetch.h" 8040939Sdes#include "common.h" 8141862Sdes#include "httperr.h" 8237535Sdes 8363012Sdes/* Maximum number of redirects to follow */ 8463012Sdes#define MAX_REDIRECT 5 8537535Sdes 8663012Sdes/* Symbolic names for reply codes we care about */ 8763012Sdes#define HTTP_OK 200 8863012Sdes#define HTTP_PARTIAL 206 8963012Sdes#define HTTP_MOVED_PERM 301 9063012Sdes#define HTTP_MOVED_TEMP 302 9163012Sdes#define HTTP_SEE_OTHER 303 9263012Sdes#define HTTP_NEED_AUTH 401 9387317Sdes#define HTTP_NEED_PROXY_AUTH 407 9463012Sdes#define HTTP_PROTOCOL_ERROR 999 9560196Sdes 9663012Sdes#define HTTP_REDIRECT(xyz) ((xyz) == HTTP_MOVED_PERM \ 9790267Sdes || (xyz) == HTTP_MOVED_TEMP \ 9890267Sdes || (xyz) == HTTP_SEE_OTHER) 9963012Sdes 10088771Sdes#define HTTP_ERROR(xyz) ((xyz) > 400 && (xyz) < 599) 10163012Sdes 10290267Sdes 10363012Sdes/***************************************************************************** 10463012Sdes * I/O functions for decoding chunked streams 10563012Sdes */ 10663012Sdes 10797859Sdesstruct httpio 10837535Sdes{ 10997858Sdes conn_t *conn; /* connection */ 11097866Sdes int chunked; /* chunked mode */ 11197858Sdes char *buf; /* chunk buffer */ 11297866Sdes size_t bufsize; /* size of chunk buffer */ 11397866Sdes ssize_t buflen; /* amount of data currently in buffer */ 11497866Sdes int bufpos; /* current read offset in buffer */ 11597858Sdes int eof; /* end-of-file flag */ 11697858Sdes int error; /* error flag */ 11797858Sdes size_t chunksize; /* remaining size of current chunk */ 11863281Sdes#ifndef NDEBUG 11990267Sdes size_t total; 12063012Sdes#endif 12137535Sdes}; 12237535Sdes 12337608Sdes/* 12463012Sdes * Get next chunk header 12537608Sdes */ 12637608Sdesstatic int 12797859Sdes_http_new_chunk(struct httpio *io) 12837608Sdes{ 12990267Sdes char *p; 13090267Sdes 13197859Sdes if (_fetch_getln(io->conn) == -1) 13290267Sdes return (-1); 13390267Sdes 13497859Sdes if (io->conn->buflen < 2 || !ishexnumber(*io->conn->buf)) 13590267Sdes return (-1); 13690267Sdes 13797859Sdes for (p = io->conn->buf; *p && !isspace(*p); ++p) { 13890267Sdes if (*p == ';') 13990267Sdes break; 14090267Sdes if (!ishexnumber(*p)) 14190267Sdes return (-1); 14290267Sdes if (isdigit(*p)) { 14397859Sdes io->chunksize = io->chunksize * 16 + 14490267Sdes *p - '0'; 14590267Sdes } else { 14697859Sdes io->chunksize = io->chunksize * 16 + 14790267Sdes 10 + tolower(*p) - 'a'; 14890267Sdes } 14990267Sdes } 15090267Sdes 15163281Sdes#ifndef NDEBUG 15290267Sdes if (fetchDebug) { 15397859Sdes io->total += io->chunksize; 15497859Sdes if (io->chunksize == 0) 15590267Sdes fprintf(stderr, "_http_fillbuf(): " 15690267Sdes "end of last chunk\n"); 15790267Sdes else 15890267Sdes fprintf(stderr, "_http_fillbuf(): " 15990267Sdes "new chunk: %lu (%lu)\n", 16097859Sdes (unsigned long)io->chunksize, (unsigned long)io->total); 16190267Sdes } 16263012Sdes#endif 16390267Sdes 16497859Sdes return (io->chunksize); 16537608Sdes} 16637608Sdes 16737608Sdes/* 16897866Sdes * Grow the input buffer to at least len bytes 16997866Sdes */ 17097866Sdesstatic inline int 17197866Sdes_http_growbuf(struct httpio *io, size_t len) 17297866Sdes{ 17397866Sdes char *tmp; 17497866Sdes 17597866Sdes if (io->bufsize >= len) 17697866Sdes return (0); 17797866Sdes 17897866Sdes if ((tmp = realloc(io->buf, len)) == NULL) 17997866Sdes return (-1); 18097866Sdes io->buf = tmp; 18197866Sdes io->bufsize = len; 182106044Sdes return (0); 18397866Sdes} 18497866Sdes 18597866Sdes/* 18637608Sdes * Fill the input buffer, do chunk decoding on the fly 18737608Sdes */ 18863012Sdesstatic int 18997866Sdes_http_fillbuf(struct httpio *io, size_t len) 19037535Sdes{ 19197859Sdes if (io->error) 19290267Sdes return (-1); 19397859Sdes if (io->eof) 19490267Sdes return (0); 19590267Sdes 19697866Sdes if (io->chunked == 0) { 19797866Sdes if (_http_growbuf(io, len) == -1) 19897866Sdes return (-1); 19997866Sdes if ((io->buflen = _fetch_read(io->conn, io->buf, len)) == -1) 20097866Sdes return (-1); 20197866Sdes io->bufpos = 0; 20297866Sdes return (io->buflen); 20397866Sdes } 20497866Sdes 20597859Sdes if (io->chunksize == 0) { 20697859Sdes switch (_http_new_chunk(io)) { 20790267Sdes case -1: 20897859Sdes io->error = 1; 20990267Sdes return (-1); 21090267Sdes case 0: 21197859Sdes io->eof = 1; 21290267Sdes return (0); 21390267Sdes } 21437535Sdes } 21563012Sdes 21697866Sdes if (len > io->chunksize) 21797866Sdes len = io->chunksize; 21897866Sdes if (_http_growbuf(io, len) == -1) 21990267Sdes return (-1); 22097866Sdes if ((io->buflen = _fetch_read(io->conn, io->buf, len)) == -1) 22197866Sdes return (-1); 22297866Sdes io->chunksize -= io->buflen; 22390267Sdes 22497859Sdes if (io->chunksize == 0) { 22597856Sdes char endl[2]; 22697856Sdes 22797866Sdes if (_fetch_read(io->conn, endl, 2) != 2 || 22897856Sdes endl[0] != '\r' || endl[1] != '\n') 22990267Sdes return (-1); 23090267Sdes } 23190267Sdes 23297866Sdes io->bufpos = 0; 23390267Sdes 23497866Sdes return (io->buflen); 23537535Sdes} 23637535Sdes 23737608Sdes/* 23837608Sdes * Read function 23937608Sdes */ 24037535Sdesstatic int 24163012Sdes_http_readfn(void *v, char *buf, int len) 24237535Sdes{ 24397859Sdes struct httpio *io = (struct httpio *)v; 24490267Sdes int l, pos; 24563012Sdes 24697859Sdes if (io->error) 24790267Sdes return (-1); 24897859Sdes if (io->eof) 24990267Sdes return (0); 25063012Sdes 25190267Sdes for (pos = 0; len > 0; pos += l, len -= l) { 25290267Sdes /* empty buffer */ 25397866Sdes if (!io->buf || io->bufpos == io->buflen) 25497866Sdes if (_http_fillbuf(io, len) < 1) 25590267Sdes break; 25697866Sdes l = io->buflen - io->bufpos; 25790267Sdes if (len < l) 25890267Sdes l = len; 25997866Sdes bcopy(io->buf + io->bufpos, buf + pos, l); 26097866Sdes io->bufpos += l; 26190267Sdes } 26237535Sdes 26397859Sdes if (!pos && io->error) 26490267Sdes return (-1); 26590267Sdes return (pos); 26637535Sdes} 26737535Sdes 26837608Sdes/* 26937608Sdes * Write function 27037608Sdes */ 27137535Sdesstatic int 27263012Sdes_http_writefn(void *v, const char *buf, int len) 27337535Sdes{ 27497859Sdes struct httpio *io = (struct httpio *)v; 27590267Sdes 27697866Sdes return (_fetch_write(io->conn, buf, len)); 27737535Sdes} 27837535Sdes 27937608Sdes/* 28037608Sdes * Close function 28137608Sdes */ 28237535Sdesstatic int 28363012Sdes_http_closefn(void *v) 28437535Sdes{ 28597859Sdes struct httpio *io = (struct httpio *)v; 28690267Sdes int r; 28763012Sdes 28897859Sdes r = _fetch_close(io->conn); 28997859Sdes if (io->buf) 29097859Sdes free(io->buf); 29197859Sdes free(io); 29290267Sdes return (r); 29337535Sdes} 29437535Sdes 29537608Sdes/* 29663012Sdes * Wrap a file descriptor up 29737608Sdes */ 29863012Sdesstatic FILE * 29997866Sdes_http_funopen(conn_t *conn, int chunked) 30037535Sdes{ 30197859Sdes struct httpio *io; 30290267Sdes FILE *f; 30363012Sdes 30497859Sdes if ((io = calloc(1, sizeof *io)) == NULL) { 30590267Sdes _fetch_syserr(); 30690267Sdes return (NULL); 30790267Sdes } 30897859Sdes io->conn = conn; 30997866Sdes io->chunked = chunked; 31097859Sdes f = funopen(io, _http_readfn, _http_writefn, NULL, _http_closefn); 31190267Sdes if (f == NULL) { 31290267Sdes _fetch_syserr(); 31397859Sdes free(io); 31490267Sdes return (NULL); 31590267Sdes } 31690267Sdes return (f); 31763012Sdes} 31863012Sdes 31990267Sdes 32063012Sdes/***************************************************************************** 32163012Sdes * Helper functions for talking to the server and parsing its replies 32263012Sdes */ 32363012Sdes 32463012Sdes/* Header types */ 32563012Sdestypedef enum { 32690267Sdes hdr_syserror = -2, 32790267Sdes hdr_error = -1, 32890267Sdes hdr_end = 0, 32990267Sdes hdr_unknown = 1, 33090267Sdes hdr_content_length, 33190267Sdes hdr_content_range, 33290267Sdes hdr_last_modified, 33390267Sdes hdr_location, 33490267Sdes hdr_transfer_encoding, 33590267Sdes hdr_www_authenticate 33685093Sdes} hdr_t; 33763012Sdes 33863012Sdes/* Names of interesting headers */ 33963012Sdesstatic struct { 34090267Sdes hdr_t num; 34190267Sdes const char *name; 34263012Sdes} hdr_names[] = { 34390267Sdes { hdr_content_length, "Content-Length" }, 34490267Sdes { hdr_content_range, "Content-Range" }, 34590267Sdes { hdr_last_modified, "Last-Modified" }, 34690267Sdes { hdr_location, "Location" }, 34790267Sdes { hdr_transfer_encoding, "Transfer-Encoding" }, 34890267Sdes { hdr_www_authenticate, "WWW-Authenticate" }, 34990267Sdes { hdr_unknown, NULL }, 35063012Sdes}; 35163012Sdes 35263012Sdes/* 35363012Sdes * Send a formatted line; optionally echo to terminal 35463012Sdes */ 35563012Sdesstatic int 35697856Sdes_http_cmd(conn_t *conn, const char *fmt, ...) 35763012Sdes{ 35890267Sdes va_list ap; 35990267Sdes size_t len; 36090267Sdes char *msg; 36190267Sdes int r; 36263012Sdes 36390267Sdes va_start(ap, fmt); 36490267Sdes len = vasprintf(&msg, fmt, ap); 36590267Sdes va_end(ap); 36690267Sdes 36790267Sdes if (msg == NULL) { 36890267Sdes errno = ENOMEM; 36990267Sdes _fetch_syserr(); 37090267Sdes return (-1); 37190267Sdes } 37290267Sdes 37397856Sdes r = _fetch_putln(conn, msg, len); 37490267Sdes free(msg); 37590267Sdes 37690267Sdes if (r == -1) { 37790267Sdes _fetch_syserr(); 37890267Sdes return (-1); 37990267Sdes } 38090267Sdes 38190267Sdes return (0); 38263012Sdes} 38363012Sdes 38463012Sdes/* 38563012Sdes * Get and parse status line 38663012Sdes */ 38763012Sdesstatic int 38897856Sdes_http_get_reply(conn_t *conn) 38963012Sdes{ 39090267Sdes char *p; 39190267Sdes 39297856Sdes if (_fetch_getln(conn) == -1) 39390267Sdes return (-1); 39490267Sdes /* 39590267Sdes * A valid status line looks like "HTTP/m.n xyz reason" where m 39690267Sdes * and n are the major and minor protocol version numbers and xyz 39790267Sdes * is the reply code. 39890267Sdes * Unfortunately, there are servers out there (NCSA 1.5.1, to name 39990267Sdes * just one) that do not send a version number, so we can't rely 40090267Sdes * on finding one, but if we do, insist on it being 1.0 or 1.1. 40190267Sdes * We don't care about the reason phrase. 40290267Sdes */ 40397856Sdes if (strncmp(conn->buf, "HTTP", 4) != 0) 40490267Sdes return (HTTP_PROTOCOL_ERROR); 40597856Sdes p = conn->buf + 4; 40690267Sdes if (*p == '/') { 40790267Sdes if (p[1] != '1' || p[2] != '.' || (p[3] != '0' && p[3] != '1')) 40890267Sdes return (HTTP_PROTOCOL_ERROR); 40990267Sdes p += 4; 41090267Sdes } 41190267Sdes if (*p != ' ' || !isdigit(p[1]) || !isdigit(p[2]) || !isdigit(p[3])) 41290267Sdes return (HTTP_PROTOCOL_ERROR); 41390267Sdes 41497856Sdes conn->err = (p[1] - '0') * 100 + (p[2] - '0') * 10 + (p[3] - '0'); 41597856Sdes return (conn->err); 41637535Sdes} 41737535Sdes 41837608Sdes/* 41990267Sdes * Check a header; if the type matches the given string, return a pointer 42090267Sdes * to the beginning of the value. 42163012Sdes */ 42275891Sarchiestatic const char * 42375891Sarchie_http_match(const char *str, const char *hdr) 42463012Sdes{ 42590267Sdes while (*str && *hdr && tolower(*str++) == tolower(*hdr++)) 42690267Sdes /* nothing */; 42790267Sdes if (*str || *hdr != ':') 42890267Sdes return (NULL); 42990267Sdes while (*hdr && isspace(*++hdr)) 43090267Sdes /* nothing */; 43190267Sdes return (hdr); 43263012Sdes} 43363012Sdes 43463012Sdes/* 43563012Sdes * Get the next header and return the appropriate symbolic code. 43663012Sdes */ 43785093Sdesstatic hdr_t 43897856Sdes_http_next_header(conn_t *conn, const char **p) 43963012Sdes{ 44090267Sdes int i; 44190267Sdes 44297856Sdes if (_fetch_getln(conn) == -1) 44390267Sdes return (hdr_syserror); 44497856Sdes while (conn->buflen && isspace(conn->buf[conn->buflen - 1])) 44597856Sdes conn->buflen--; 44697856Sdes conn->buf[conn->buflen] = '\0'; 44797856Sdes if (conn->buflen == 0) 44897856Sdes return (hdr_end); 44990267Sdes /* 45090267Sdes * We could check for malformed headers but we don't really care. 45190267Sdes * A valid header starts with a token immediately followed by a 45290267Sdes * colon; a token is any sequence of non-control, non-whitespace 45390267Sdes * characters except "()<>@,;:\\\"{}". 45490267Sdes */ 45590267Sdes for (i = 0; hdr_names[i].num != hdr_unknown; i++) 45697856Sdes if ((*p = _http_match(hdr_names[i].name, conn->buf)) != NULL) 45790267Sdes return (hdr_names[i].num); 45890267Sdes return (hdr_unknown); 45963012Sdes} 46063012Sdes 46163012Sdes/* 46263012Sdes * Parse a last-modified header 46363012Sdes */ 46463716Sdesstatic int 46575891Sarchie_http_parse_mtime(const char *p, time_t *mtime) 46663012Sdes{ 46790267Sdes char locale[64], *r; 46890267Sdes struct tm tm; 46963012Sdes 47090267Sdes strncpy(locale, setlocale(LC_TIME, NULL), sizeof locale); 47190267Sdes setlocale(LC_TIME, "C"); 47290267Sdes r = strptime(p, "%a, %d %b %Y %H:%M:%S GMT", &tm); 47390267Sdes /* XXX should add support for date-2 and date-3 */ 47490267Sdes setlocale(LC_TIME, locale); 47590267Sdes if (r == NULL) 47690267Sdes return (-1); 47790267Sdes DEBUG(fprintf(stderr, "last modified: [%04d-%02d-%02d " 47888769Sdes "%02d:%02d:%02d]\n", 47963012Sdes tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 48063012Sdes tm.tm_hour, tm.tm_min, tm.tm_sec)); 48190267Sdes *mtime = timegm(&tm); 48290267Sdes return (0); 48363012Sdes} 48463012Sdes 48563012Sdes/* 48663012Sdes * Parse a content-length header 48763012Sdes */ 48863716Sdesstatic int 48975891Sarchie_http_parse_length(const char *p, off_t *length) 49063012Sdes{ 49190267Sdes off_t len; 49290267Sdes 49390267Sdes for (len = 0; *p && isdigit(*p); ++p) 49490267Sdes len = len * 10 + (*p - '0'); 49590267Sdes if (*p) 49690267Sdes return (-1); 49790267Sdes DEBUG(fprintf(stderr, "content length: [%lld]\n", 49890267Sdes (long long)len)); 49990267Sdes *length = len; 50090267Sdes return (0); 50163012Sdes} 50263012Sdes 50363012Sdes/* 50463012Sdes * Parse a content-range header 50563012Sdes */ 50663716Sdesstatic int 50775891Sarchie_http_parse_range(const char *p, off_t *offset, off_t *length, off_t *size) 50863012Sdes{ 50990267Sdes off_t first, last, len; 51063716Sdes 51190267Sdes if (strncasecmp(p, "bytes ", 6) != 0) 51290267Sdes return (-1); 51390267Sdes for (first = 0, p += 6; *p && isdigit(*p); ++p) 51490267Sdes first = first * 10 + *p - '0'; 51590267Sdes if (*p != '-') 51690267Sdes return (-1); 51790267Sdes for (last = 0, ++p; *p && isdigit(*p); ++p) 51890267Sdes last = last * 10 + *p - '0'; 51990267Sdes if (first > last || *p != '/') 52090267Sdes return (-1); 52190267Sdes for (len = 0, ++p; *p && isdigit(*p); ++p) 52290267Sdes len = len * 10 + *p - '0'; 52390267Sdes if (*p || len < last - first + 1) 52490267Sdes return (-1); 52590267Sdes DEBUG(fprintf(stderr, "content range: [%lld-%lld/%lld]\n", 52690267Sdes (long long)first, (long long)last, (long long)len)); 52790267Sdes *offset = first; 52890267Sdes *length = last - first + 1; 52990267Sdes *size = len; 53090267Sdes return (0); 53163012Sdes} 53263012Sdes 53390267Sdes 53463012Sdes/***************************************************************************** 53563012Sdes * Helper functions for authorization 53663012Sdes */ 53763012Sdes 53863012Sdes/* 53937608Sdes * Base64 encoding 54037608Sdes */ 54162965Sdesstatic char * 54290267Sdes_http_base64(const char *src) 54337608Sdes{ 54490267Sdes static const char base64[] = 54590267Sdes "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 54690267Sdes "abcdefghijklmnopqrstuvwxyz" 54790267Sdes "0123456789+/"; 54890267Sdes char *str, *dst; 54990267Sdes size_t l; 55090267Sdes int t, r; 55162965Sdes 55290267Sdes l = strlen(src); 55390267Sdes if ((str = malloc(((l + 2) / 3) * 4)) == NULL) 55490267Sdes return (NULL); 55590267Sdes dst = str; 55690267Sdes r = 0; 55737608Sdes 55890267Sdes while (l >= 3) { 55990267Sdes t = (src[0] << 16) | (src[1] << 8) | src[2]; 56090267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 56190267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 56290267Sdes dst[2] = base64[(t >> 6) & 0x3f]; 56390267Sdes dst[3] = base64[(t >> 0) & 0x3f]; 56490267Sdes src += 3; l -= 3; 56590267Sdes dst += 4; r += 4; 56690267Sdes } 56737608Sdes 56890267Sdes switch (l) { 56990267Sdes case 2: 57090267Sdes t = (src[0] << 16) | (src[1] << 8); 57190267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 57290267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 57390267Sdes dst[2] = base64[(t >> 6) & 0x3f]; 57490267Sdes dst[3] = '='; 57590267Sdes dst += 4; 57690267Sdes r += 4; 57790267Sdes break; 57890267Sdes case 1: 57990267Sdes t = src[0] << 16; 58090267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 58190267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 58290267Sdes dst[2] = dst[3] = '='; 58390267Sdes dst += 4; 58490267Sdes r += 4; 58590267Sdes break; 58690267Sdes case 0: 58790267Sdes break; 58890267Sdes } 58990267Sdes 59090267Sdes *dst = 0; 59190267Sdes return (str); 59237608Sdes} 59337608Sdes 59437608Sdes/* 59537608Sdes * Encode username and password 59637608Sdes */ 59762965Sdesstatic int 59897856Sdes_http_basic_auth(conn_t *conn, const char *hdr, const char *usr, const char *pwd) 59937608Sdes{ 60090267Sdes char *upw, *auth; 60190267Sdes int r; 60237608Sdes 60390267Sdes DEBUG(fprintf(stderr, "usr: [%s]\n", usr)); 60490267Sdes DEBUG(fprintf(stderr, "pwd: [%s]\n", pwd)); 60590267Sdes if (asprintf(&upw, "%s:%s", usr, pwd) == -1) 60690267Sdes return (-1); 60790267Sdes auth = _http_base64(upw); 60890267Sdes free(upw); 60990267Sdes if (auth == NULL) 61090267Sdes return (-1); 61197856Sdes r = _http_cmd(conn, "%s: Basic %s", hdr, auth); 61290267Sdes free(auth); 61390267Sdes return (r); 61462965Sdes} 61562965Sdes 61662965Sdes/* 61762965Sdes * Send an authorization header 61862965Sdes */ 61962965Sdesstatic int 62097856Sdes_http_authorize(conn_t *conn, const char *hdr, const char *p) 62162965Sdes{ 62290267Sdes /* basic authorization */ 62390267Sdes if (strncasecmp(p, "basic:", 6) == 0) { 62490267Sdes char *user, *pwd, *str; 62590267Sdes int r; 62662965Sdes 62790267Sdes /* skip realm */ 62890267Sdes for (p += 6; *p && *p != ':'; ++p) 62990267Sdes /* nothing */ ; 63090267Sdes if (!*p || strchr(++p, ':') == NULL) 63190267Sdes return (-1); 63290267Sdes if ((str = strdup(p)) == NULL) 63390267Sdes return (-1); /* XXX */ 63490267Sdes user = str; 63590267Sdes pwd = strchr(str, ':'); 63690267Sdes *pwd++ = '\0'; 63797856Sdes r = _http_basic_auth(conn, hdr, user, pwd); 63890267Sdes free(str); 63990267Sdes return (r); 64090267Sdes } 64190267Sdes return (-1); 64237608Sdes} 64337608Sdes 64490267Sdes 64563012Sdes/***************************************************************************** 64663012Sdes * Helper functions for connecting to a server or proxy 64763012Sdes */ 64863012Sdes 64937608Sdes/* 65090267Sdes * Connect to the correct HTTP server or proxy. 65163012Sdes */ 65297856Sdesstatic conn_t * 65375891Sarchie_http_connect(struct url *URL, struct url *purl, const char *flags) 65463012Sdes{ 65597856Sdes conn_t *conn; 65690267Sdes int verbose; 65797856Sdes int af; 65890267Sdes 65963012Sdes#ifdef INET6 66090267Sdes af = AF_UNSPEC; 66160737Sume#else 66290267Sdes af = AF_INET; 66360737Sume#endif 66490267Sdes 66590267Sdes verbose = CHECK_FLAG('v'); 66690267Sdes if (CHECK_FLAG('4')) 66790267Sdes af = AF_INET; 66867043Sdes#ifdef INET6 66990267Sdes else if (CHECK_FLAG('6')) 67090267Sdes af = AF_INET6; 67167043Sdes#endif 67267043Sdes 67397868Sdes if (purl && strcasecmp(URL->scheme, SCHEME_HTTPS) != 0) { 67490267Sdes URL = purl; 67590267Sdes } else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0) { 67690267Sdes /* can't talk http to an ftp server */ 67790267Sdes /* XXX should set an error code */ 67897856Sdes return (NULL); 67990267Sdes } 68090267Sdes 68197856Sdes if ((conn = _fetch_connect(URL->host, URL->port, af, verbose)) == NULL) 68290267Sdes /* _fetch_connect() has already set an error code */ 68397856Sdes return (NULL); 68497868Sdes if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0 && 68597868Sdes _fetch_ssl(conn, verbose) == -1) { 68697868Sdes _fetch_close(conn); 68797891Sdes /* grrr */ 68897891Sdes errno = EAUTH; 68997891Sdes _fetch_syserr(); 69097868Sdes return (NULL); 69197868Sdes } 69297856Sdes return (conn); 69367043Sdes} 69467043Sdes 69567043Sdesstatic struct url * 69675891Sarchie_http_get_proxy(void) 69767043Sdes{ 69890267Sdes struct url *purl; 69990267Sdes char *p; 70090267Sdes 70190267Sdes if (((p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) && 70290267Sdes (purl = fetchParseURL(p))) { 70390267Sdes if (!*purl->scheme) 70490267Sdes strcpy(purl->scheme, SCHEME_HTTP); 70590267Sdes if (!purl->port) 70690267Sdes purl->port = _fetch_default_proxy_port(purl->scheme); 70790267Sdes if (strcasecmp(purl->scheme, SCHEME_HTTP) == 0) 70890267Sdes return (purl); 70990267Sdes fetchFreeURL(purl); 71090267Sdes } 71190267Sdes return (NULL); 71260376Sdes} 71360376Sdes 71488771Sdesstatic void 71588771Sdes_http_print_html(FILE *out, FILE *in) 71688771Sdes{ 71790267Sdes size_t len; 71890267Sdes char *line, *p, *q; 71990267Sdes int comment, tag; 72088771Sdes 72190267Sdes comment = tag = 0; 72290267Sdes while ((line = fgetln(in, &len)) != NULL) { 72390267Sdes while (len && isspace(line[len - 1])) 72490267Sdes --len; 72590267Sdes for (p = q = line; q < line + len; ++q) { 72690267Sdes if (comment && *q == '-') { 72790267Sdes if (q + 2 < line + len && 72890267Sdes strcmp(q, "-->") == 0) { 72990267Sdes tag = comment = 0; 73090267Sdes q += 2; 73190267Sdes } 73290267Sdes } else if (tag && !comment && *q == '>') { 73390267Sdes p = q + 1; 73490267Sdes tag = 0; 73590267Sdes } else if (!tag && *q == '<') { 73690267Sdes if (q > p) 73790267Sdes fwrite(p, q - p, 1, out); 73890267Sdes tag = 1; 73990267Sdes if (q + 3 < line + len && 74090267Sdes strcmp(q, "<!--") == 0) { 74190267Sdes comment = 1; 74290267Sdes q += 3; 74390267Sdes } 74490267Sdes } 74588771Sdes } 74690267Sdes if (!tag && q > p) 74790267Sdes fwrite(p, q - p, 1, out); 74890267Sdes fputc('\n', out); 74988771Sdes } 75088771Sdes} 75188771Sdes 75290267Sdes 75363012Sdes/***************************************************************************** 75463012Sdes * Core 75560954Sdes */ 75660954Sdes 75760954Sdes/* 75863012Sdes * Send a request and process the reply 75997866Sdes * 76097866Sdes * XXX This function is way too long, the do..while loop should be split 76197866Sdes * XXX off into a separate function. 76260376Sdes */ 76367043SdesFILE * 76475891Sarchie_http_request(struct url *URL, const char *op, struct url_stat *us, 76590267Sdes struct url *purl, const char *flags) 76660376Sdes{ 76797856Sdes conn_t *conn; 76890267Sdes struct url *url, *new; 76990267Sdes int chunked, direct, need_auth, noredirect, verbose; 77098422Sdes int e, i, n; 77190267Sdes off_t offset, clength, length, size; 77290267Sdes time_t mtime; 77390267Sdes const char *p; 77490267Sdes FILE *f; 77590267Sdes hdr_t h; 77690267Sdes char *host; 77760737Sume#ifdef INET6 77890267Sdes char hbuf[MAXHOSTNAMELEN + 1]; 77960737Sume#endif 78063012Sdes 78190267Sdes direct = CHECK_FLAG('d'); 78290267Sdes noredirect = CHECK_FLAG('A'); 78390267Sdes verbose = CHECK_FLAG('v'); 78460737Sume 78590267Sdes if (direct && purl) { 78690267Sdes fetchFreeURL(purl); 78790267Sdes purl = NULL; 78890267Sdes } 78963716Sdes 79090267Sdes /* try the provided URL first */ 79190267Sdes url = URL; 79263012Sdes 79390267Sdes /* if the A flag is set, we only get one try */ 79490267Sdes n = noredirect ? 1 : MAX_REDIRECT; 79590267Sdes i = 0; 79663012Sdes 79798422Sdes e = HTTP_PROTOCOL_ERROR; 79890267Sdes need_auth = 0; 79990267Sdes do { 80090267Sdes new = NULL; 80190267Sdes chunked = 0; 80290267Sdes offset = 0; 80390267Sdes clength = -1; 80490267Sdes length = -1; 80590267Sdes size = -1; 80690267Sdes mtime = 0; 80790267Sdes 80890267Sdes /* check port */ 80990267Sdes if (!url->port) 81090267Sdes url->port = _fetch_default_port(url->scheme); 81190267Sdes 81290267Sdes /* were we redirected to an FTP URL? */ 81390267Sdes if (purl == NULL && strcmp(url->scheme, SCHEME_FTP) == 0) { 81490267Sdes if (strcmp(op, "GET") == 0) 81590267Sdes return (_ftp_request(url, "RETR", us, purl, flags)); 81690267Sdes else if (strcmp(op, "HEAD") == 0) 81790267Sdes return (_ftp_request(url, "STAT", us, purl, flags)); 81890267Sdes } 81990267Sdes 82090267Sdes /* connect to server or proxy */ 82197856Sdes if ((conn = _http_connect(url, purl, flags)) == NULL) 82290267Sdes goto ouch; 82390267Sdes 82490267Sdes host = url->host; 82560737Sume#ifdef INET6 82690267Sdes if (strchr(url->host, ':')) { 82790267Sdes snprintf(hbuf, sizeof(hbuf), "[%s]", url->host); 82890267Sdes host = hbuf; 82990267Sdes } 83060737Sume#endif 83137535Sdes 83290267Sdes /* send request */ 83390267Sdes if (verbose) 83490267Sdes _fetch_info("requesting %s://%s:%d%s", 83590267Sdes url->scheme, host, url->port, url->doc); 83690267Sdes if (purl) { 83797856Sdes _http_cmd(conn, "%s %s://%s:%d%s HTTP/1.1", 83890267Sdes op, url->scheme, host, url->port, url->doc); 83990267Sdes } else { 84097856Sdes _http_cmd(conn, "%s %s HTTP/1.1", 84190267Sdes op, url->doc); 84290267Sdes } 84337535Sdes 84490267Sdes /* virtual host */ 84590267Sdes if (url->port == _fetch_default_port(url->scheme)) 84697856Sdes _http_cmd(conn, "Host: %s", host); 84790267Sdes else 84897856Sdes _http_cmd(conn, "Host: %s:%d", host, url->port); 84990267Sdes 85090267Sdes /* proxy authorization */ 85190267Sdes if (purl) { 85290267Sdes if (*purl->user || *purl->pwd) 85397856Sdes _http_basic_auth(conn, "Proxy-Authorization", 85490267Sdes purl->user, purl->pwd); 85590267Sdes else if ((p = getenv("HTTP_PROXY_AUTH")) != NULL && *p != '\0') 85697856Sdes _http_authorize(conn, "Proxy-Authorization", p); 85790267Sdes } 85890267Sdes 85990267Sdes /* server authorization */ 86090267Sdes if (need_auth || *url->user || *url->pwd) { 86190267Sdes if (*url->user || *url->pwd) 86297856Sdes _http_basic_auth(conn, "Authorization", url->user, url->pwd); 86390267Sdes else if ((p = getenv("HTTP_AUTH")) != NULL && *p != '\0') 86497856Sdes _http_authorize(conn, "Authorization", p); 86590267Sdes else if (fetchAuthMethod && fetchAuthMethod(url) == 0) { 86697856Sdes _http_basic_auth(conn, "Authorization", url->user, url->pwd); 86790267Sdes } else { 86890267Sdes _http_seterr(HTTP_NEED_AUTH); 86990267Sdes goto ouch; 87090267Sdes } 87190267Sdes } 87290267Sdes 87390267Sdes /* other headers */ 87490267Sdes if ((p = getenv("HTTP_USER_AGENT")) != NULL && *p != '\0') 87597856Sdes _http_cmd(conn, "User-Agent: %s", p); 87690267Sdes else 87797856Sdes _http_cmd(conn, "User-Agent: %s " _LIBFETCH_VER, getprogname()); 87890267Sdes if (url->offset) 87997856Sdes _http_cmd(conn, "Range: bytes=%lld-", (long long)url->offset); 88097856Sdes _http_cmd(conn, "Connection: close"); 88197856Sdes _http_cmd(conn, ""); 88290267Sdes 88390267Sdes /* get reply */ 88497856Sdes switch (_http_get_reply(conn)) { 88590267Sdes case HTTP_OK: 88690267Sdes case HTTP_PARTIAL: 88790267Sdes /* fine */ 88890267Sdes break; 88990267Sdes case HTTP_MOVED_PERM: 89090267Sdes case HTTP_MOVED_TEMP: 89190267Sdes case HTTP_SEE_OTHER: 89290267Sdes /* 89390267Sdes * Not so fine, but we still have to read the headers to 89490267Sdes * get the new location. 89590267Sdes */ 89690267Sdes break; 89790267Sdes case HTTP_NEED_AUTH: 89890267Sdes if (need_auth) { 89990267Sdes /* 90090267Sdes * We already sent out authorization code, so there's 90190267Sdes * nothing more we can do. 90290267Sdes */ 90397856Sdes _http_seterr(conn->err); 90490267Sdes goto ouch; 90590267Sdes } 90690267Sdes /* try again, but send the password this time */ 90790267Sdes if (verbose) 90890267Sdes _fetch_info("server requires authorization"); 90990267Sdes break; 91090267Sdes case HTTP_NEED_PROXY_AUTH: 91190267Sdes /* 91290267Sdes * If we're talking to a proxy, we already sent our proxy 91390267Sdes * authorization code, so there's nothing more we can do. 91490267Sdes */ 91597856Sdes _http_seterr(conn->err); 91690267Sdes goto ouch; 91790267Sdes case HTTP_PROTOCOL_ERROR: 91890267Sdes /* fall through */ 91990267Sdes case -1: 92090267Sdes _fetch_syserr(); 92190267Sdes goto ouch; 92290267Sdes default: 92397856Sdes _http_seterr(conn->err); 92490267Sdes if (!verbose) 92590267Sdes goto ouch; 92690267Sdes /* fall through so we can get the full error message */ 92790267Sdes } 92890267Sdes 92990267Sdes /* get headers */ 93090267Sdes do { 93197856Sdes switch ((h = _http_next_header(conn, &p))) { 93290267Sdes case hdr_syserror: 93390267Sdes _fetch_syserr(); 93490267Sdes goto ouch; 93590267Sdes case hdr_error: 93690267Sdes _http_seterr(HTTP_PROTOCOL_ERROR); 93790267Sdes goto ouch; 93890267Sdes case hdr_content_length: 93990267Sdes _http_parse_length(p, &clength); 94090267Sdes break; 94190267Sdes case hdr_content_range: 94290267Sdes _http_parse_range(p, &offset, &length, &size); 94390267Sdes break; 94490267Sdes case hdr_last_modified: 94590267Sdes _http_parse_mtime(p, &mtime); 94690267Sdes break; 94790267Sdes case hdr_location: 94897856Sdes if (!HTTP_REDIRECT(conn->err)) 94990267Sdes break; 95090267Sdes if (new) 95190267Sdes free(new); 95290267Sdes if (verbose) 95397856Sdes _fetch_info("%d redirect to %s", conn->err, p); 95490267Sdes if (*p == '/') 95590267Sdes /* absolute path */ 95690267Sdes new = fetchMakeURL(url->scheme, url->host, url->port, p, 95790267Sdes url->user, url->pwd); 95890267Sdes else 95990267Sdes new = fetchParseURL(p); 96090267Sdes if (new == NULL) { 96190267Sdes /* XXX should set an error code */ 96290267Sdes DEBUG(fprintf(stderr, "failed to parse new URL\n")); 96390267Sdes goto ouch; 96490267Sdes } 96590267Sdes if (!*new->user && !*new->pwd) { 96690267Sdes strcpy(new->user, url->user); 96790267Sdes strcpy(new->pwd, url->pwd); 96890267Sdes } 96990267Sdes new->offset = url->offset; 97090267Sdes new->length = url->length; 97190267Sdes break; 97290267Sdes case hdr_transfer_encoding: 97390267Sdes /* XXX weak test*/ 97490267Sdes chunked = (strcasecmp(p, "chunked") == 0); 97590267Sdes break; 97690267Sdes case hdr_www_authenticate: 97797856Sdes if (conn->err != HTTP_NEED_AUTH) 97890267Sdes break; 97990267Sdes /* if we were smarter, we'd check the method and realm */ 98090267Sdes break; 98190267Sdes case hdr_end: 98290267Sdes /* fall through */ 98390267Sdes case hdr_unknown: 98490267Sdes /* ignore */ 98590267Sdes break; 98690267Sdes } 98790267Sdes } while (h > hdr_end); 98890267Sdes 98990267Sdes /* we need to provide authentication */ 99097856Sdes if (conn->err == HTTP_NEED_AUTH) { 99198422Sdes e = conn->err; 99290267Sdes need_auth = 1; 99397856Sdes _fetch_close(conn); 99497856Sdes conn = NULL; 99590267Sdes continue; 99690267Sdes } 99790267Sdes 998104404Sru /* we have a hit or an error */ 999104404Sru if (conn->err == HTTP_OK || conn->err == HTTP_PARTIAL || HTTP_ERROR(conn->err)) 1000104404Sru break; 1001104404Sru 100290267Sdes /* all other cases: we got a redirect */ 100398422Sdes e = conn->err; 100490267Sdes need_auth = 0; 100597856Sdes _fetch_close(conn); 100697856Sdes conn = NULL; 100790267Sdes if (!new) { 100890267Sdes DEBUG(fprintf(stderr, "redirect with no new location\n")); 100990267Sdes break; 101090267Sdes } 101190267Sdes if (url != URL) 101290267Sdes fetchFreeURL(url); 101390267Sdes url = new; 101490267Sdes } while (++i < n); 101590267Sdes 101690267Sdes /* we failed, or ran out of retries */ 101797856Sdes if (conn == NULL) { 101898422Sdes _http_seterr(e); 101963012Sdes goto ouch; 102063012Sdes } 102160376Sdes 102290267Sdes DEBUG(fprintf(stderr, "offset %lld, length %lld," 102390267Sdes " size %lld, clength %lld\n", 102490267Sdes (long long)offset, (long long)length, 102590267Sdes (long long)size, (long long)clength)); 102660376Sdes 102790267Sdes /* check for inconsistencies */ 102890267Sdes if (clength != -1 && length != -1 && clength != length) { 102990267Sdes _http_seterr(HTTP_PROTOCOL_ERROR); 103063012Sdes goto ouch; 103163012Sdes } 103290267Sdes if (clength == -1) 103390267Sdes clength = length; 103490267Sdes if (clength != -1) 103590267Sdes length = offset + clength; 103690267Sdes if (length != -1 && size != -1 && length != size) { 103763012Sdes _http_seterr(HTTP_PROTOCOL_ERROR); 103863012Sdes goto ouch; 103990267Sdes } 104090267Sdes if (size == -1) 104190267Sdes size = length; 104260376Sdes 104390267Sdes /* fill in stats */ 104490267Sdes if (us) { 104590267Sdes us->size = size; 104690267Sdes us->atime = us->mtime = mtime; 104790267Sdes } 104863069Sdes 104990267Sdes /* too far? */ 105090267Sdes if (offset > URL->offset) { 105190267Sdes _http_seterr(HTTP_PROTOCOL_ERROR); 105290267Sdes goto ouch; 105377238Sdes } 105460376Sdes 105590267Sdes /* report back real offset and size */ 105690267Sdes URL->offset = offset; 105790267Sdes URL->length = clength; 105837535Sdes 105990267Sdes /* wrap it up in a FILE */ 106097866Sdes if ((f = _http_funopen(conn, chunked)) == NULL) { 106190267Sdes _fetch_syserr(); 106290267Sdes goto ouch; 106390267Sdes } 106463716Sdes 106590267Sdes if (url != URL) 106690267Sdes fetchFreeURL(url); 106790267Sdes if (purl) 106890267Sdes fetchFreeURL(purl); 106963567Sdes 107097856Sdes if (HTTP_ERROR(conn->err)) { 107190267Sdes _http_print_html(stderr, f); 107290267Sdes fclose(f); 107390267Sdes f = NULL; 107490267Sdes } 107563012Sdes 107690267Sdes return (f); 107788771Sdes 107890267Sdesouch: 107990267Sdes if (url != URL) 108090267Sdes fetchFreeURL(url); 108190267Sdes if (purl) 108290267Sdes fetchFreeURL(purl); 108397856Sdes if (conn != NULL) 108497856Sdes _fetch_close(conn); 108590267Sdes return (NULL); 108663012Sdes} 108760189Sdes 108890267Sdes 108963012Sdes/***************************************************************************** 109063012Sdes * Entry points 109163012Sdes */ 109263012Sdes 109363012Sdes/* 109463340Sdes * Retrieve and stat a file by HTTP 109563340Sdes */ 109663340SdesFILE * 109775891SarchiefetchXGetHTTP(struct url *URL, struct url_stat *us, const char *flags) 109863340Sdes{ 109990267Sdes return (_http_request(URL, "GET", us, _http_get_proxy(), flags)); 110063340Sdes} 110163340Sdes 110263340Sdes/* 110363012Sdes * Retrieve a file by HTTP 110463012Sdes */ 110563012SdesFILE * 110675891SarchiefetchGetHTTP(struct url *URL, const char *flags) 110763012Sdes{ 110890267Sdes return (fetchXGetHTTP(URL, NULL, flags)); 110937535Sdes} 111037535Sdes 111163340Sdes/* 111263340Sdes * Store a file by HTTP 111363340Sdes */ 111437535SdesFILE * 111585093SdesfetchPutHTTP(struct url *URL __unused, const char *flags __unused) 111637535Sdes{ 111790267Sdes warnx("fetchPutHTTP(): not implemented"); 111890267Sdes return (NULL); 111937535Sdes} 112040975Sdes 112140975Sdes/* 112240975Sdes * Get an HTTP document's metadata 112340975Sdes */ 112440975Sdesint 112575891SarchiefetchStatHTTP(struct url *URL, struct url_stat *us, const char *flags) 112640975Sdes{ 112790267Sdes FILE *f; 112890267Sdes 112990267Sdes if ((f = _http_request(URL, "HEAD", us, _http_get_proxy(), flags)) == NULL) 113090267Sdes return (-1); 113190267Sdes fclose(f); 113290267Sdes return (0); 113340975Sdes} 113441989Sdes 113541989Sdes/* 113641989Sdes * List a directory 113741989Sdes */ 113841989Sdesstruct url_ent * 113985093SdesfetchListHTTP(struct url *url __unused, const char *flags __unused) 114041989Sdes{ 114190267Sdes warnx("fetchListHTTP(): not implemented"); 114290267Sdes return (NULL); 114341989Sdes} 1144