http.c revision 141958
137535Sdes/*- 2135546Sdes * Copyright (c) 2000-2004 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 141958 2005-02-16 00:22:20Z kbyanc $"); 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 79141958Skbyanc#include <netinet/in.h> 80141958Skbyanc#include <netinet/tcp.h> 81141958Skbyanc 8237535Sdes#include "fetch.h" 8340939Sdes#include "common.h" 8441862Sdes#include "httperr.h" 8537535Sdes 8663012Sdes/* Maximum number of redirects to follow */ 8763012Sdes#define MAX_REDIRECT 5 8837535Sdes 8963012Sdes/* Symbolic names for reply codes we care about */ 9063012Sdes#define HTTP_OK 200 9163012Sdes#define HTTP_PARTIAL 206 9263012Sdes#define HTTP_MOVED_PERM 301 9363012Sdes#define HTTP_MOVED_TEMP 302 9463012Sdes#define HTTP_SEE_OTHER 303 9563012Sdes#define HTTP_NEED_AUTH 401 9687317Sdes#define HTTP_NEED_PROXY_AUTH 407 97125696Sdes#define HTTP_BAD_RANGE 416 9863012Sdes#define HTTP_PROTOCOL_ERROR 999 9960196Sdes 10063012Sdes#define HTTP_REDIRECT(xyz) ((xyz) == HTTP_MOVED_PERM \ 10190267Sdes || (xyz) == HTTP_MOVED_TEMP \ 10290267Sdes || (xyz) == HTTP_SEE_OTHER) 10363012Sdes 10488771Sdes#define HTTP_ERROR(xyz) ((xyz) > 400 && (xyz) < 599) 10563012Sdes 10690267Sdes 10763012Sdes/***************************************************************************** 10863012Sdes * I/O functions for decoding chunked streams 10963012Sdes */ 11063012Sdes 11197859Sdesstruct httpio 11237535Sdes{ 11397858Sdes conn_t *conn; /* connection */ 11497866Sdes int chunked; /* chunked mode */ 11597858Sdes char *buf; /* chunk buffer */ 11697866Sdes size_t bufsize; /* size of chunk buffer */ 11797866Sdes ssize_t buflen; /* amount of data currently in buffer */ 11897866Sdes int bufpos; /* current read offset in buffer */ 11997858Sdes int eof; /* end-of-file flag */ 12097858Sdes int error; /* error flag */ 12197858Sdes size_t chunksize; /* remaining size of current chunk */ 12263281Sdes#ifndef NDEBUG 12390267Sdes size_t total; 12463012Sdes#endif 12537535Sdes}; 12637535Sdes 12737608Sdes/* 12863012Sdes * Get next chunk header 12937608Sdes */ 13037608Sdesstatic int 13197859Sdes_http_new_chunk(struct httpio *io) 13237608Sdes{ 13390267Sdes char *p; 13490267Sdes 13597859Sdes if (_fetch_getln(io->conn) == -1) 13690267Sdes return (-1); 13790267Sdes 13897859Sdes if (io->conn->buflen < 2 || !ishexnumber(*io->conn->buf)) 13990267Sdes return (-1); 14090267Sdes 14197859Sdes for (p = io->conn->buf; *p && !isspace(*p); ++p) { 14290267Sdes if (*p == ';') 14390267Sdes break; 14490267Sdes if (!ishexnumber(*p)) 14590267Sdes return (-1); 14690267Sdes if (isdigit(*p)) { 14797859Sdes io->chunksize = io->chunksize * 16 + 14890267Sdes *p - '0'; 14990267Sdes } else { 15097859Sdes io->chunksize = io->chunksize * 16 + 15190267Sdes 10 + tolower(*p) - 'a'; 15290267Sdes } 15390267Sdes } 15490267Sdes 15563281Sdes#ifndef NDEBUG 15690267Sdes if (fetchDebug) { 15797859Sdes io->total += io->chunksize; 15897859Sdes if (io->chunksize == 0) 159106207Sdes fprintf(stderr, "%s(): end of last chunk\n", __func__); 16090267Sdes else 161106207Sdes fprintf(stderr, "%s(): new chunk: %lu (%lu)\n", 162106207Sdes __func__, (unsigned long)io->chunksize, 163106207Sdes (unsigned long)io->total); 16490267Sdes } 16563012Sdes#endif 16690267Sdes 16797859Sdes return (io->chunksize); 16837608Sdes} 16937608Sdes 17037608Sdes/* 17197866Sdes * Grow the input buffer to at least len bytes 17297866Sdes */ 17397866Sdesstatic inline int 17497866Sdes_http_growbuf(struct httpio *io, size_t len) 17597866Sdes{ 17697866Sdes char *tmp; 17797866Sdes 17897866Sdes if (io->bufsize >= len) 17997866Sdes return (0); 18097866Sdes 18197866Sdes if ((tmp = realloc(io->buf, len)) == NULL) 18297866Sdes return (-1); 18397866Sdes io->buf = tmp; 18497866Sdes io->bufsize = len; 185106044Sdes return (0); 18697866Sdes} 18797866Sdes 18897866Sdes/* 18937608Sdes * Fill the input buffer, do chunk decoding on the fly 19037608Sdes */ 19163012Sdesstatic int 19297866Sdes_http_fillbuf(struct httpio *io, size_t len) 19337535Sdes{ 19497859Sdes if (io->error) 19590267Sdes return (-1); 19697859Sdes if (io->eof) 19790267Sdes return (0); 19890267Sdes 19997866Sdes if (io->chunked == 0) { 20097866Sdes if (_http_growbuf(io, len) == -1) 20197866Sdes return (-1); 202106185Sdes if ((io->buflen = _fetch_read(io->conn, io->buf, len)) == -1) { 203106185Sdes io->error = 1; 20497866Sdes return (-1); 205106185Sdes } 20697866Sdes io->bufpos = 0; 20797866Sdes return (io->buflen); 20897866Sdes } 20997866Sdes 21097859Sdes if (io->chunksize == 0) { 21197859Sdes switch (_http_new_chunk(io)) { 21290267Sdes case -1: 21397859Sdes io->error = 1; 21490267Sdes return (-1); 21590267Sdes case 0: 21697859Sdes io->eof = 1; 21790267Sdes return (0); 21890267Sdes } 21937535Sdes } 22063012Sdes 22197866Sdes if (len > io->chunksize) 22297866Sdes len = io->chunksize; 22397866Sdes if (_http_growbuf(io, len) == -1) 22490267Sdes return (-1); 225106185Sdes if ((io->buflen = _fetch_read(io->conn, io->buf, len)) == -1) { 226106185Sdes io->error = 1; 22797866Sdes return (-1); 228106185Sdes } 22997866Sdes io->chunksize -= io->buflen; 23090267Sdes 23197859Sdes if (io->chunksize == 0) { 23297856Sdes char endl[2]; 23397856Sdes 23497866Sdes if (_fetch_read(io->conn, endl, 2) != 2 || 23597856Sdes endl[0] != '\r' || endl[1] != '\n') 23690267Sdes return (-1); 23790267Sdes } 23890267Sdes 23997866Sdes io->bufpos = 0; 24090267Sdes 24197866Sdes return (io->buflen); 24237535Sdes} 24337535Sdes 24437608Sdes/* 24537608Sdes * Read function 24637608Sdes */ 24737535Sdesstatic int 24863012Sdes_http_readfn(void *v, char *buf, int len) 24937535Sdes{ 25097859Sdes struct httpio *io = (struct httpio *)v; 25190267Sdes int l, pos; 25263012Sdes 25397859Sdes if (io->error) 25490267Sdes return (-1); 25597859Sdes if (io->eof) 25690267Sdes return (0); 25763012Sdes 25890267Sdes for (pos = 0; len > 0; pos += l, len -= l) { 25990267Sdes /* empty buffer */ 26097866Sdes if (!io->buf || io->bufpos == io->buflen) 26197866Sdes if (_http_fillbuf(io, len) < 1) 26290267Sdes break; 26397866Sdes l = io->buflen - io->bufpos; 26490267Sdes if (len < l) 26590267Sdes l = len; 26697866Sdes bcopy(io->buf + io->bufpos, buf + pos, l); 26797866Sdes io->bufpos += l; 26890267Sdes } 26937535Sdes 27097859Sdes if (!pos && io->error) 27190267Sdes return (-1); 27290267Sdes return (pos); 27337535Sdes} 27437535Sdes 27537608Sdes/* 27637608Sdes * Write function 27737608Sdes */ 27837535Sdesstatic int 27963012Sdes_http_writefn(void *v, const char *buf, int len) 28037535Sdes{ 28197859Sdes struct httpio *io = (struct httpio *)v; 28290267Sdes 28397866Sdes return (_fetch_write(io->conn, buf, len)); 28437535Sdes} 28537535Sdes 28637608Sdes/* 28737608Sdes * Close function 28837608Sdes */ 28937535Sdesstatic int 29063012Sdes_http_closefn(void *v) 29137535Sdes{ 29297859Sdes struct httpio *io = (struct httpio *)v; 29390267Sdes int r; 29463012Sdes 29597859Sdes r = _fetch_close(io->conn); 29697859Sdes if (io->buf) 29797859Sdes free(io->buf); 29897859Sdes free(io); 29990267Sdes return (r); 30037535Sdes} 30137535Sdes 30237608Sdes/* 30363012Sdes * Wrap a file descriptor up 30437608Sdes */ 30563012Sdesstatic FILE * 30697866Sdes_http_funopen(conn_t *conn, int chunked) 30737535Sdes{ 30897859Sdes struct httpio *io; 30990267Sdes FILE *f; 31063012Sdes 311109967Sdes if ((io = calloc(1, sizeof(*io))) == NULL) { 31290267Sdes _fetch_syserr(); 31390267Sdes return (NULL); 31490267Sdes } 31597859Sdes io->conn = conn; 31697866Sdes io->chunked = chunked; 31797859Sdes f = funopen(io, _http_readfn, _http_writefn, NULL, _http_closefn); 31890267Sdes if (f == NULL) { 31990267Sdes _fetch_syserr(); 32097859Sdes free(io); 32190267Sdes return (NULL); 32290267Sdes } 32390267Sdes return (f); 32463012Sdes} 32563012Sdes 32690267Sdes 32763012Sdes/***************************************************************************** 32863012Sdes * Helper functions for talking to the server and parsing its replies 32963012Sdes */ 33063012Sdes 33163012Sdes/* Header types */ 33263012Sdestypedef enum { 33390267Sdes hdr_syserror = -2, 33490267Sdes hdr_error = -1, 33590267Sdes hdr_end = 0, 33690267Sdes hdr_unknown = 1, 33790267Sdes hdr_content_length, 33890267Sdes hdr_content_range, 33990267Sdes hdr_last_modified, 34090267Sdes hdr_location, 34190267Sdes hdr_transfer_encoding, 34290267Sdes hdr_www_authenticate 34385093Sdes} hdr_t; 34463012Sdes 34563012Sdes/* Names of interesting headers */ 34663012Sdesstatic struct { 34790267Sdes hdr_t num; 34890267Sdes const char *name; 34963012Sdes} hdr_names[] = { 35090267Sdes { hdr_content_length, "Content-Length" }, 35190267Sdes { hdr_content_range, "Content-Range" }, 35290267Sdes { hdr_last_modified, "Last-Modified" }, 35390267Sdes { hdr_location, "Location" }, 35490267Sdes { hdr_transfer_encoding, "Transfer-Encoding" }, 35590267Sdes { hdr_www_authenticate, "WWW-Authenticate" }, 35690267Sdes { hdr_unknown, NULL }, 35763012Sdes}; 35863012Sdes 35963012Sdes/* 36063012Sdes * Send a formatted line; optionally echo to terminal 36163012Sdes */ 36263012Sdesstatic int 36397856Sdes_http_cmd(conn_t *conn, const char *fmt, ...) 36463012Sdes{ 36590267Sdes va_list ap; 36690267Sdes size_t len; 36790267Sdes char *msg; 36890267Sdes int r; 36963012Sdes 37090267Sdes va_start(ap, fmt); 37190267Sdes len = vasprintf(&msg, fmt, ap); 37290267Sdes va_end(ap); 37390267Sdes 37490267Sdes if (msg == NULL) { 37590267Sdes errno = ENOMEM; 37690267Sdes _fetch_syserr(); 37790267Sdes return (-1); 37890267Sdes } 37990267Sdes 38097856Sdes r = _fetch_putln(conn, msg, len); 38190267Sdes free(msg); 38290267Sdes 38390267Sdes if (r == -1) { 38490267Sdes _fetch_syserr(); 38590267Sdes return (-1); 38690267Sdes } 38790267Sdes 38890267Sdes return (0); 38963012Sdes} 39063012Sdes 39163012Sdes/* 39263012Sdes * Get and parse status line 39363012Sdes */ 39463012Sdesstatic int 39597856Sdes_http_get_reply(conn_t *conn) 39663012Sdes{ 39790267Sdes char *p; 39890267Sdes 39997856Sdes if (_fetch_getln(conn) == -1) 40090267Sdes return (-1); 40190267Sdes /* 40290267Sdes * A valid status line looks like "HTTP/m.n xyz reason" where m 40390267Sdes * and n are the major and minor protocol version numbers and xyz 40490267Sdes * is the reply code. 40590267Sdes * Unfortunately, there are servers out there (NCSA 1.5.1, to name 40690267Sdes * just one) that do not send a version number, so we can't rely 40790267Sdes * on finding one, but if we do, insist on it being 1.0 or 1.1. 40890267Sdes * We don't care about the reason phrase. 40990267Sdes */ 41097856Sdes if (strncmp(conn->buf, "HTTP", 4) != 0) 41190267Sdes return (HTTP_PROTOCOL_ERROR); 41297856Sdes p = conn->buf + 4; 41390267Sdes if (*p == '/') { 41490267Sdes if (p[1] != '1' || p[2] != '.' || (p[3] != '0' && p[3] != '1')) 41590267Sdes return (HTTP_PROTOCOL_ERROR); 41690267Sdes p += 4; 41790267Sdes } 41890267Sdes if (*p != ' ' || !isdigit(p[1]) || !isdigit(p[2]) || !isdigit(p[3])) 41990267Sdes return (HTTP_PROTOCOL_ERROR); 42090267Sdes 42197856Sdes conn->err = (p[1] - '0') * 100 + (p[2] - '0') * 10 + (p[3] - '0'); 42297856Sdes return (conn->err); 42337535Sdes} 42437535Sdes 42537608Sdes/* 42690267Sdes * Check a header; if the type matches the given string, return a pointer 42790267Sdes * to the beginning of the value. 42863012Sdes */ 42975891Sarchiestatic const char * 43075891Sarchie_http_match(const char *str, const char *hdr) 43163012Sdes{ 43290267Sdes while (*str && *hdr && tolower(*str++) == tolower(*hdr++)) 43390267Sdes /* nothing */; 43490267Sdes if (*str || *hdr != ':') 43590267Sdes return (NULL); 43690267Sdes while (*hdr && isspace(*++hdr)) 43790267Sdes /* nothing */; 43890267Sdes return (hdr); 43963012Sdes} 44063012Sdes 44163012Sdes/* 44263012Sdes * Get the next header and return the appropriate symbolic code. 44363012Sdes */ 44485093Sdesstatic hdr_t 44597856Sdes_http_next_header(conn_t *conn, const char **p) 44663012Sdes{ 44790267Sdes int i; 44890267Sdes 44997856Sdes if (_fetch_getln(conn) == -1) 45090267Sdes return (hdr_syserror); 45197856Sdes while (conn->buflen && isspace(conn->buf[conn->buflen - 1])) 45297856Sdes conn->buflen--; 45397856Sdes conn->buf[conn->buflen] = '\0'; 45497856Sdes if (conn->buflen == 0) 45597856Sdes return (hdr_end); 45690267Sdes /* 45790267Sdes * We could check for malformed headers but we don't really care. 45890267Sdes * A valid header starts with a token immediately followed by a 45990267Sdes * colon; a token is any sequence of non-control, non-whitespace 46090267Sdes * characters except "()<>@,;:\\\"{}". 46190267Sdes */ 46290267Sdes for (i = 0; hdr_names[i].num != hdr_unknown; i++) 46397856Sdes if ((*p = _http_match(hdr_names[i].name, conn->buf)) != NULL) 46490267Sdes return (hdr_names[i].num); 46590267Sdes return (hdr_unknown); 46663012Sdes} 46763012Sdes 46863012Sdes/* 46963012Sdes * Parse a last-modified header 47063012Sdes */ 47163716Sdesstatic int 47275891Sarchie_http_parse_mtime(const char *p, time_t *mtime) 47363012Sdes{ 47490267Sdes char locale[64], *r; 47590267Sdes struct tm tm; 47663012Sdes 477109967Sdes strncpy(locale, setlocale(LC_TIME, NULL), sizeof(locale)); 47890267Sdes setlocale(LC_TIME, "C"); 47990267Sdes r = strptime(p, "%a, %d %b %Y %H:%M:%S GMT", &tm); 48090267Sdes /* XXX should add support for date-2 and date-3 */ 48190267Sdes setlocale(LC_TIME, locale); 48290267Sdes if (r == NULL) 48390267Sdes return (-1); 48490267Sdes DEBUG(fprintf(stderr, "last modified: [%04d-%02d-%02d " 48588769Sdes "%02d:%02d:%02d]\n", 48663012Sdes tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 48763012Sdes tm.tm_hour, tm.tm_min, tm.tm_sec)); 48890267Sdes *mtime = timegm(&tm); 48990267Sdes return (0); 49063012Sdes} 49163012Sdes 49263012Sdes/* 49363012Sdes * Parse a content-length header 49463012Sdes */ 49563716Sdesstatic int 49675891Sarchie_http_parse_length(const char *p, off_t *length) 49763012Sdes{ 49890267Sdes off_t len; 49990267Sdes 50090267Sdes for (len = 0; *p && isdigit(*p); ++p) 50190267Sdes len = len * 10 + (*p - '0'); 50290267Sdes if (*p) 50390267Sdes return (-1); 50490267Sdes DEBUG(fprintf(stderr, "content length: [%lld]\n", 50590267Sdes (long long)len)); 50690267Sdes *length = len; 50790267Sdes return (0); 50863012Sdes} 50963012Sdes 51063012Sdes/* 51163012Sdes * Parse a content-range header 51263012Sdes */ 51363716Sdesstatic int 51475891Sarchie_http_parse_range(const char *p, off_t *offset, off_t *length, off_t *size) 51563012Sdes{ 51690267Sdes off_t first, last, len; 51763716Sdes 51890267Sdes if (strncasecmp(p, "bytes ", 6) != 0) 51990267Sdes return (-1); 520125696Sdes p += 6; 521125696Sdes if (*p == '*') { 522125696Sdes first = last = -1; 523125696Sdes ++p; 524125696Sdes } else { 525125696Sdes for (first = 0; *p && isdigit(*p); ++p) 526125696Sdes first = first * 10 + *p - '0'; 527125696Sdes if (*p != '-') 528125696Sdes return (-1); 529125696Sdes for (last = 0, ++p; *p && isdigit(*p); ++p) 530125696Sdes last = last * 10 + *p - '0'; 531125696Sdes } 53290267Sdes if (first > last || *p != '/') 53390267Sdes return (-1); 53490267Sdes for (len = 0, ++p; *p && isdigit(*p); ++p) 53590267Sdes len = len * 10 + *p - '0'; 53690267Sdes if (*p || len < last - first + 1) 53790267Sdes return (-1); 538125696Sdes if (first == -1) { 539125696Sdes DEBUG(fprintf(stderr, "content range: [*/%lld]\n", 540125696Sdes (long long)len)); 541125696Sdes *length = 0; 542125696Sdes } else { 543125696Sdes DEBUG(fprintf(stderr, "content range: [%lld-%lld/%lld]\n", 544125696Sdes (long long)first, (long long)last, (long long)len)); 545125696Sdes *length = last - first + 1; 546125696Sdes } 54790267Sdes *offset = first; 54890267Sdes *size = len; 54990267Sdes return (0); 55063012Sdes} 55163012Sdes 55290267Sdes 55363012Sdes/***************************************************************************** 55463012Sdes * Helper functions for authorization 55563012Sdes */ 55663012Sdes 55763012Sdes/* 55837608Sdes * Base64 encoding 55937608Sdes */ 56062965Sdesstatic char * 56190267Sdes_http_base64(const char *src) 56237608Sdes{ 56390267Sdes static const char base64[] = 56490267Sdes "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 56590267Sdes "abcdefghijklmnopqrstuvwxyz" 56690267Sdes "0123456789+/"; 56790267Sdes char *str, *dst; 56890267Sdes size_t l; 56990267Sdes int t, r; 57062965Sdes 57190267Sdes l = strlen(src); 572133280Sdes if ((str = malloc(((l + 2) / 3) * 4 + 1)) == NULL) 57390267Sdes return (NULL); 57490267Sdes dst = str; 57590267Sdes r = 0; 57637608Sdes 57790267Sdes while (l >= 3) { 57890267Sdes t = (src[0] << 16) | (src[1] << 8) | src[2]; 57990267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 58090267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 58190267Sdes dst[2] = base64[(t >> 6) & 0x3f]; 58290267Sdes dst[3] = base64[(t >> 0) & 0x3f]; 58390267Sdes src += 3; l -= 3; 58490267Sdes dst += 4; r += 4; 58590267Sdes } 58637608Sdes 58790267Sdes switch (l) { 58890267Sdes case 2: 58990267Sdes t = (src[0] << 16) | (src[1] << 8); 59090267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 59190267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 59290267Sdes dst[2] = base64[(t >> 6) & 0x3f]; 59390267Sdes dst[3] = '='; 59490267Sdes dst += 4; 59590267Sdes r += 4; 59690267Sdes break; 59790267Sdes case 1: 59890267Sdes t = src[0] << 16; 59990267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 60090267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 60190267Sdes dst[2] = dst[3] = '='; 60290267Sdes dst += 4; 60390267Sdes r += 4; 60490267Sdes break; 60590267Sdes case 0: 60690267Sdes break; 60790267Sdes } 60890267Sdes 60990267Sdes *dst = 0; 61090267Sdes return (str); 61137608Sdes} 61237608Sdes 61337608Sdes/* 61437608Sdes * Encode username and password 61537608Sdes */ 61662965Sdesstatic int 61797856Sdes_http_basic_auth(conn_t *conn, const char *hdr, const char *usr, const char *pwd) 61837608Sdes{ 61990267Sdes char *upw, *auth; 62090267Sdes int r; 62137608Sdes 62290267Sdes DEBUG(fprintf(stderr, "usr: [%s]\n", usr)); 62390267Sdes DEBUG(fprintf(stderr, "pwd: [%s]\n", pwd)); 62490267Sdes if (asprintf(&upw, "%s:%s", usr, pwd) == -1) 62590267Sdes return (-1); 62690267Sdes auth = _http_base64(upw); 62790267Sdes free(upw); 62890267Sdes if (auth == NULL) 62990267Sdes return (-1); 63097856Sdes r = _http_cmd(conn, "%s: Basic %s", hdr, auth); 63190267Sdes free(auth); 63290267Sdes return (r); 63362965Sdes} 63462965Sdes 63562965Sdes/* 63662965Sdes * Send an authorization header 63762965Sdes */ 63862965Sdesstatic int 63997856Sdes_http_authorize(conn_t *conn, const char *hdr, const char *p) 64062965Sdes{ 64190267Sdes /* basic authorization */ 64290267Sdes if (strncasecmp(p, "basic:", 6) == 0) { 64390267Sdes char *user, *pwd, *str; 64490267Sdes int r; 64562965Sdes 64690267Sdes /* skip realm */ 64790267Sdes for (p += 6; *p && *p != ':'; ++p) 64890267Sdes /* nothing */ ; 64990267Sdes if (!*p || strchr(++p, ':') == NULL) 65090267Sdes return (-1); 65190267Sdes if ((str = strdup(p)) == NULL) 65290267Sdes return (-1); /* XXX */ 65390267Sdes user = str; 65490267Sdes pwd = strchr(str, ':'); 65590267Sdes *pwd++ = '\0'; 65697856Sdes r = _http_basic_auth(conn, hdr, user, pwd); 65790267Sdes free(str); 65890267Sdes return (r); 65990267Sdes } 66090267Sdes return (-1); 66137608Sdes} 66237608Sdes 66390267Sdes 66463012Sdes/***************************************************************************** 66563012Sdes * Helper functions for connecting to a server or proxy 66663012Sdes */ 66763012Sdes 66837608Sdes/* 66990267Sdes * Connect to the correct HTTP server or proxy. 67063012Sdes */ 67197856Sdesstatic conn_t * 67275891Sarchie_http_connect(struct url *URL, struct url *purl, const char *flags) 67363012Sdes{ 67497856Sdes conn_t *conn; 67590267Sdes int verbose; 676141958Skbyanc int af, val; 67790267Sdes 67863012Sdes#ifdef INET6 67990267Sdes af = AF_UNSPEC; 68060737Sume#else 68190267Sdes af = AF_INET; 68260737Sume#endif 68390267Sdes 68490267Sdes verbose = CHECK_FLAG('v'); 68590267Sdes if (CHECK_FLAG('4')) 68690267Sdes af = AF_INET; 68767043Sdes#ifdef INET6 68890267Sdes else if (CHECK_FLAG('6')) 68990267Sdes af = AF_INET6; 69067043Sdes#endif 69167043Sdes 69297868Sdes if (purl && strcasecmp(URL->scheme, SCHEME_HTTPS) != 0) { 69390267Sdes URL = purl; 69490267Sdes } else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0) { 69590267Sdes /* can't talk http to an ftp server */ 69690267Sdes /* XXX should set an error code */ 69797856Sdes return (NULL); 69890267Sdes } 69990267Sdes 70097856Sdes if ((conn = _fetch_connect(URL->host, URL->port, af, verbose)) == NULL) 70190267Sdes /* _fetch_connect() has already set an error code */ 70297856Sdes return (NULL); 70397868Sdes if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0 && 70497868Sdes _fetch_ssl(conn, verbose) == -1) { 70597868Sdes _fetch_close(conn); 70697891Sdes /* grrr */ 70797891Sdes errno = EAUTH; 70897891Sdes _fetch_syserr(); 70997868Sdes return (NULL); 71097868Sdes } 711141958Skbyanc 712141958Skbyanc val = 1; 713141958Skbyanc setsockopt(conn->sd, IPPROTO_TCP, TCP_NOPUSH, &val, sizeof(val)); 714141958Skbyanc 71597856Sdes return (conn); 71667043Sdes} 71767043Sdes 71867043Sdesstatic struct url * 719112081Sdes_http_get_proxy(const char *flags) 72067043Sdes{ 72190267Sdes struct url *purl; 72290267Sdes char *p; 72390267Sdes 724112797Sdes if (flags != NULL && strchr(flags, 'd') != NULL) 725112081Sdes return (NULL); 72690267Sdes if (((p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) && 72790267Sdes (purl = fetchParseURL(p))) { 72890267Sdes if (!*purl->scheme) 72990267Sdes strcpy(purl->scheme, SCHEME_HTTP); 73090267Sdes if (!purl->port) 73190267Sdes purl->port = _fetch_default_proxy_port(purl->scheme); 73290267Sdes if (strcasecmp(purl->scheme, SCHEME_HTTP) == 0) 73390267Sdes return (purl); 73490267Sdes fetchFreeURL(purl); 73590267Sdes } 73690267Sdes return (NULL); 73760376Sdes} 73860376Sdes 73988771Sdesstatic void 74088771Sdes_http_print_html(FILE *out, FILE *in) 74188771Sdes{ 74290267Sdes size_t len; 74390267Sdes char *line, *p, *q; 74490267Sdes int comment, tag; 74588771Sdes 74690267Sdes comment = tag = 0; 74790267Sdes while ((line = fgetln(in, &len)) != NULL) { 74890267Sdes while (len && isspace(line[len - 1])) 74990267Sdes --len; 75090267Sdes for (p = q = line; q < line + len; ++q) { 75190267Sdes if (comment && *q == '-') { 75290267Sdes if (q + 2 < line + len && 75390267Sdes strcmp(q, "-->") == 0) { 75490267Sdes tag = comment = 0; 75590267Sdes q += 2; 75690267Sdes } 75790267Sdes } else if (tag && !comment && *q == '>') { 75890267Sdes p = q + 1; 75990267Sdes tag = 0; 76090267Sdes } else if (!tag && *q == '<') { 76190267Sdes if (q > p) 76290267Sdes fwrite(p, q - p, 1, out); 76390267Sdes tag = 1; 76490267Sdes if (q + 3 < line + len && 76590267Sdes strcmp(q, "<!--") == 0) { 76690267Sdes comment = 1; 76790267Sdes q += 3; 76890267Sdes } 76990267Sdes } 77088771Sdes } 77190267Sdes if (!tag && q > p) 77290267Sdes fwrite(p, q - p, 1, out); 77390267Sdes fputc('\n', out); 77488771Sdes } 77588771Sdes} 77688771Sdes 77790267Sdes 77863012Sdes/***************************************************************************** 77963012Sdes * Core 78060954Sdes */ 78160954Sdes 78260954Sdes/* 78363012Sdes * Send a request and process the reply 78497866Sdes * 78597866Sdes * XXX This function is way too long, the do..while loop should be split 78697866Sdes * XXX off into a separate function. 78760376Sdes */ 78867043SdesFILE * 78975891Sarchie_http_request(struct url *URL, const char *op, struct url_stat *us, 79090267Sdes struct url *purl, const char *flags) 79160376Sdes{ 79297856Sdes conn_t *conn; 79390267Sdes struct url *url, *new; 79490267Sdes int chunked, direct, need_auth, noredirect, verbose; 79598422Sdes int e, i, n; 79690267Sdes off_t offset, clength, length, size; 79790267Sdes time_t mtime; 79890267Sdes const char *p; 79990267Sdes FILE *f; 80090267Sdes hdr_t h; 801107372Sdes char hbuf[MAXHOSTNAMELEN + 7], *host; 80263012Sdes 80390267Sdes direct = CHECK_FLAG('d'); 80490267Sdes noredirect = CHECK_FLAG('A'); 80590267Sdes verbose = CHECK_FLAG('v'); 80660737Sume 80790267Sdes if (direct && purl) { 80890267Sdes fetchFreeURL(purl); 80990267Sdes purl = NULL; 81090267Sdes } 81163716Sdes 81290267Sdes /* try the provided URL first */ 81390267Sdes url = URL; 81463012Sdes 81590267Sdes /* if the A flag is set, we only get one try */ 81690267Sdes n = noredirect ? 1 : MAX_REDIRECT; 81790267Sdes i = 0; 81863012Sdes 81998422Sdes e = HTTP_PROTOCOL_ERROR; 82090267Sdes need_auth = 0; 82190267Sdes do { 82290267Sdes new = NULL; 82390267Sdes chunked = 0; 82490267Sdes offset = 0; 82590267Sdes clength = -1; 82690267Sdes length = -1; 82790267Sdes size = -1; 82890267Sdes mtime = 0; 82990267Sdes 83090267Sdes /* check port */ 83190267Sdes if (!url->port) 83290267Sdes url->port = _fetch_default_port(url->scheme); 83390267Sdes 83490267Sdes /* were we redirected to an FTP URL? */ 83590267Sdes if (purl == NULL && strcmp(url->scheme, SCHEME_FTP) == 0) { 83690267Sdes if (strcmp(op, "GET") == 0) 83790267Sdes return (_ftp_request(url, "RETR", us, purl, flags)); 83890267Sdes else if (strcmp(op, "HEAD") == 0) 83990267Sdes return (_ftp_request(url, "STAT", us, purl, flags)); 84090267Sdes } 84190267Sdes 84290267Sdes /* connect to server or proxy */ 84397856Sdes if ((conn = _http_connect(url, purl, flags)) == NULL) 84490267Sdes goto ouch; 84590267Sdes 84690267Sdes host = url->host; 84760737Sume#ifdef INET6 84890267Sdes if (strchr(url->host, ':')) { 84990267Sdes snprintf(hbuf, sizeof(hbuf), "[%s]", url->host); 85090267Sdes host = hbuf; 85190267Sdes } 85260737Sume#endif 853107372Sdes if (url->port != _fetch_default_port(url->scheme)) { 854107372Sdes if (host != hbuf) { 855107372Sdes strcpy(hbuf, host); 856107372Sdes host = hbuf; 857107372Sdes } 858107372Sdes snprintf(hbuf + strlen(hbuf), 859107372Sdes sizeof(hbuf) - strlen(hbuf), ":%d", url->port); 860107372Sdes } 86137535Sdes 86290267Sdes /* send request */ 86390267Sdes if (verbose) 864107372Sdes _fetch_info("requesting %s://%s%s", 865107372Sdes url->scheme, host, url->doc); 86690267Sdes if (purl) { 867107372Sdes _http_cmd(conn, "%s %s://%s%s HTTP/1.1", 868107372Sdes op, url->scheme, host, url->doc); 86990267Sdes } else { 87097856Sdes _http_cmd(conn, "%s %s HTTP/1.1", 87190267Sdes op, url->doc); 87290267Sdes } 87337535Sdes 87490267Sdes /* virtual host */ 875107372Sdes _http_cmd(conn, "Host: %s", host); 87690267Sdes 87790267Sdes /* proxy authorization */ 87890267Sdes if (purl) { 87990267Sdes if (*purl->user || *purl->pwd) 88097856Sdes _http_basic_auth(conn, "Proxy-Authorization", 88190267Sdes purl->user, purl->pwd); 88290267Sdes else if ((p = getenv("HTTP_PROXY_AUTH")) != NULL && *p != '\0') 88397856Sdes _http_authorize(conn, "Proxy-Authorization", p); 88490267Sdes } 88590267Sdes 88690267Sdes /* server authorization */ 88790267Sdes if (need_auth || *url->user || *url->pwd) { 88890267Sdes if (*url->user || *url->pwd) 88997856Sdes _http_basic_auth(conn, "Authorization", url->user, url->pwd); 89090267Sdes else if ((p = getenv("HTTP_AUTH")) != NULL && *p != '\0') 89197856Sdes _http_authorize(conn, "Authorization", p); 89290267Sdes else if (fetchAuthMethod && fetchAuthMethod(url) == 0) { 89397856Sdes _http_basic_auth(conn, "Authorization", url->user, url->pwd); 89490267Sdes } else { 89590267Sdes _http_seterr(HTTP_NEED_AUTH); 89690267Sdes goto ouch; 89790267Sdes } 89890267Sdes } 89990267Sdes 90090267Sdes /* other headers */ 901107372Sdes if ((p = getenv("HTTP_REFERER")) != NULL && *p != '\0') { 902107372Sdes if (strcasecmp(p, "auto") == 0) 903107372Sdes _http_cmd(conn, "Referer: %s://%s%s", 904107372Sdes url->scheme, host, url->doc); 905107372Sdes else 906107372Sdes _http_cmd(conn, "Referer: %s", p); 907107372Sdes } 90890267Sdes if ((p = getenv("HTTP_USER_AGENT")) != NULL && *p != '\0') 90997856Sdes _http_cmd(conn, "User-Agent: %s", p); 91090267Sdes else 91197856Sdes _http_cmd(conn, "User-Agent: %s " _LIBFETCH_VER, getprogname()); 912109693Sdes if (url->offset > 0) 91397856Sdes _http_cmd(conn, "Range: bytes=%lld-", (long long)url->offset); 91497856Sdes _http_cmd(conn, "Connection: close"); 91597856Sdes _http_cmd(conn, ""); 916141958Skbyanc shutdown(conn->sd, SHUT_WR); 91790267Sdes 91890267Sdes /* get reply */ 91997856Sdes switch (_http_get_reply(conn)) { 92090267Sdes case HTTP_OK: 92190267Sdes case HTTP_PARTIAL: 92290267Sdes /* fine */ 92390267Sdes break; 92490267Sdes case HTTP_MOVED_PERM: 92590267Sdes case HTTP_MOVED_TEMP: 92690267Sdes case HTTP_SEE_OTHER: 92790267Sdes /* 928125695Sdes * Not so fine, but we still have to read the 929125695Sdes * headers to get the new location. 93090267Sdes */ 93190267Sdes break; 93290267Sdes case HTTP_NEED_AUTH: 93390267Sdes if (need_auth) { 93490267Sdes /* 935125695Sdes * We already sent out authorization code, 936125695Sdes * so there's nothing more we can do. 93790267Sdes */ 93897856Sdes _http_seterr(conn->err); 93990267Sdes goto ouch; 94090267Sdes } 94190267Sdes /* try again, but send the password this time */ 94290267Sdes if (verbose) 94390267Sdes _fetch_info("server requires authorization"); 94490267Sdes break; 94590267Sdes case HTTP_NEED_PROXY_AUTH: 94690267Sdes /* 947125695Sdes * If we're talking to a proxy, we already sent 948125695Sdes * our proxy authorization code, so there's 949125695Sdes * nothing more we can do. 95090267Sdes */ 95197856Sdes _http_seterr(conn->err); 95290267Sdes goto ouch; 953125696Sdes case HTTP_BAD_RANGE: 954125696Sdes /* 955125696Sdes * This can happen if we ask for 0 bytes because 956125696Sdes * we already have the whole file. Consider this 957125696Sdes * a success for now, and check sizes later. 958125696Sdes */ 959125696Sdes break; 96090267Sdes case HTTP_PROTOCOL_ERROR: 96190267Sdes /* fall through */ 96290267Sdes case -1: 96390267Sdes _fetch_syserr(); 96490267Sdes goto ouch; 96590267Sdes default: 96697856Sdes _http_seterr(conn->err); 96790267Sdes if (!verbose) 96890267Sdes goto ouch; 96990267Sdes /* fall through so we can get the full error message */ 97090267Sdes } 97190267Sdes 97290267Sdes /* get headers */ 97390267Sdes do { 97497856Sdes switch ((h = _http_next_header(conn, &p))) { 97590267Sdes case hdr_syserror: 97690267Sdes _fetch_syserr(); 97790267Sdes goto ouch; 97890267Sdes case hdr_error: 97990267Sdes _http_seterr(HTTP_PROTOCOL_ERROR); 98090267Sdes goto ouch; 98190267Sdes case hdr_content_length: 98290267Sdes _http_parse_length(p, &clength); 98390267Sdes break; 98490267Sdes case hdr_content_range: 98590267Sdes _http_parse_range(p, &offset, &length, &size); 98690267Sdes break; 98790267Sdes case hdr_last_modified: 98890267Sdes _http_parse_mtime(p, &mtime); 98990267Sdes break; 99090267Sdes case hdr_location: 99197856Sdes if (!HTTP_REDIRECT(conn->err)) 99290267Sdes break; 99390267Sdes if (new) 99490267Sdes free(new); 99590267Sdes if (verbose) 99697856Sdes _fetch_info("%d redirect to %s", conn->err, p); 99790267Sdes if (*p == '/') 99890267Sdes /* absolute path */ 99990267Sdes new = fetchMakeURL(url->scheme, url->host, url->port, p, 100090267Sdes url->user, url->pwd); 100190267Sdes else 100290267Sdes new = fetchParseURL(p); 100390267Sdes if (new == NULL) { 100490267Sdes /* XXX should set an error code */ 100590267Sdes DEBUG(fprintf(stderr, "failed to parse new URL\n")); 100690267Sdes goto ouch; 100790267Sdes } 100890267Sdes if (!*new->user && !*new->pwd) { 100990267Sdes strcpy(new->user, url->user); 101090267Sdes strcpy(new->pwd, url->pwd); 101190267Sdes } 101290267Sdes new->offset = url->offset; 101390267Sdes new->length = url->length; 101490267Sdes break; 101590267Sdes case hdr_transfer_encoding: 101690267Sdes /* XXX weak test*/ 101790267Sdes chunked = (strcasecmp(p, "chunked") == 0); 101890267Sdes break; 101990267Sdes case hdr_www_authenticate: 102097856Sdes if (conn->err != HTTP_NEED_AUTH) 102190267Sdes break; 102290267Sdes /* if we were smarter, we'd check the method and realm */ 102390267Sdes break; 102490267Sdes case hdr_end: 102590267Sdes /* fall through */ 102690267Sdes case hdr_unknown: 102790267Sdes /* ignore */ 102890267Sdes break; 102990267Sdes } 103090267Sdes } while (h > hdr_end); 103190267Sdes 103290267Sdes /* we need to provide authentication */ 103397856Sdes if (conn->err == HTTP_NEED_AUTH) { 103498422Sdes e = conn->err; 103590267Sdes need_auth = 1; 103697856Sdes _fetch_close(conn); 103797856Sdes conn = NULL; 103890267Sdes continue; 103990267Sdes } 104090267Sdes 1041125696Sdes /* requested range not satisfiable */ 1042125696Sdes if (conn->err == HTTP_BAD_RANGE) { 1043125696Sdes if (url->offset == size && url->length == 0) { 1044125696Sdes /* asked for 0 bytes; fake it */ 1045125696Sdes offset = url->offset; 1046125696Sdes conn->err = HTTP_OK; 1047125696Sdes break; 1048125696Sdes } else { 1049125697Sdes _http_seterr(conn->err); 1050125696Sdes goto ouch; 1051125696Sdes } 1052125696Sdes } 1053125696Sdes 1054104404Sru /* we have a hit or an error */ 1055104404Sru if (conn->err == HTTP_OK || conn->err == HTTP_PARTIAL || HTTP_ERROR(conn->err)) 1056104404Sru break; 1057104404Sru 105890267Sdes /* all other cases: we got a redirect */ 105998422Sdes e = conn->err; 106090267Sdes need_auth = 0; 106197856Sdes _fetch_close(conn); 106297856Sdes conn = NULL; 106390267Sdes if (!new) { 106490267Sdes DEBUG(fprintf(stderr, "redirect with no new location\n")); 106590267Sdes break; 106690267Sdes } 106790267Sdes if (url != URL) 106890267Sdes fetchFreeURL(url); 106990267Sdes url = new; 107090267Sdes } while (++i < n); 107190267Sdes 107290267Sdes /* we failed, or ran out of retries */ 107397856Sdes if (conn == NULL) { 107498422Sdes _http_seterr(e); 107563012Sdes goto ouch; 107663012Sdes } 107760376Sdes 107890267Sdes DEBUG(fprintf(stderr, "offset %lld, length %lld," 107990267Sdes " size %lld, clength %lld\n", 108090267Sdes (long long)offset, (long long)length, 108190267Sdes (long long)size, (long long)clength)); 108260376Sdes 108390267Sdes /* check for inconsistencies */ 108490267Sdes if (clength != -1 && length != -1 && clength != length) { 108590267Sdes _http_seterr(HTTP_PROTOCOL_ERROR); 108663012Sdes goto ouch; 108763012Sdes } 108890267Sdes if (clength == -1) 108990267Sdes clength = length; 109090267Sdes if (clength != -1) 109190267Sdes length = offset + clength; 109290267Sdes if (length != -1 && size != -1 && length != size) { 109363012Sdes _http_seterr(HTTP_PROTOCOL_ERROR); 109463012Sdes goto ouch; 109590267Sdes } 109690267Sdes if (size == -1) 109790267Sdes size = length; 109860376Sdes 109990267Sdes /* fill in stats */ 110090267Sdes if (us) { 110190267Sdes us->size = size; 110290267Sdes us->atime = us->mtime = mtime; 110390267Sdes } 110463069Sdes 110590267Sdes /* too far? */ 1106109693Sdes if (URL->offset > 0 && offset > URL->offset) { 110790267Sdes _http_seterr(HTTP_PROTOCOL_ERROR); 110890267Sdes goto ouch; 110977238Sdes } 111060376Sdes 111190267Sdes /* report back real offset and size */ 111290267Sdes URL->offset = offset; 111390267Sdes URL->length = clength; 111437535Sdes 111590267Sdes /* wrap it up in a FILE */ 111697866Sdes if ((f = _http_funopen(conn, chunked)) == NULL) { 111790267Sdes _fetch_syserr(); 111890267Sdes goto ouch; 111990267Sdes } 112063716Sdes 112190267Sdes if (url != URL) 112290267Sdes fetchFreeURL(url); 112390267Sdes if (purl) 112490267Sdes fetchFreeURL(purl); 112563567Sdes 112697856Sdes if (HTTP_ERROR(conn->err)) { 112790267Sdes _http_print_html(stderr, f); 112890267Sdes fclose(f); 112990267Sdes f = NULL; 113090267Sdes } 113163012Sdes 113290267Sdes return (f); 113388771Sdes 113490267Sdesouch: 113590267Sdes if (url != URL) 113690267Sdes fetchFreeURL(url); 113790267Sdes if (purl) 113890267Sdes fetchFreeURL(purl); 113997856Sdes if (conn != NULL) 114097856Sdes _fetch_close(conn); 114190267Sdes return (NULL); 114263012Sdes} 114360189Sdes 114490267Sdes 114563012Sdes/***************************************************************************** 114663012Sdes * Entry points 114763012Sdes */ 114863012Sdes 114963012Sdes/* 115063340Sdes * Retrieve and stat a file by HTTP 115163340Sdes */ 115263340SdesFILE * 115375891SarchiefetchXGetHTTP(struct url *URL, struct url_stat *us, const char *flags) 115463340Sdes{ 1155112081Sdes return (_http_request(URL, "GET", us, _http_get_proxy(flags), flags)); 115663340Sdes} 115763340Sdes 115863340Sdes/* 115963012Sdes * Retrieve a file by HTTP 116063012Sdes */ 116163012SdesFILE * 116275891SarchiefetchGetHTTP(struct url *URL, const char *flags) 116363012Sdes{ 116490267Sdes return (fetchXGetHTTP(URL, NULL, flags)); 116537535Sdes} 116637535Sdes 116763340Sdes/* 116863340Sdes * Store a file by HTTP 116963340Sdes */ 117037535SdesFILE * 117185093SdesfetchPutHTTP(struct url *URL __unused, const char *flags __unused) 117237535Sdes{ 117390267Sdes warnx("fetchPutHTTP(): not implemented"); 117490267Sdes return (NULL); 117537535Sdes} 117640975Sdes 117740975Sdes/* 117840975Sdes * Get an HTTP document's metadata 117940975Sdes */ 118040975Sdesint 118175891SarchiefetchStatHTTP(struct url *URL, struct url_stat *us, const char *flags) 118240975Sdes{ 118390267Sdes FILE *f; 118490267Sdes 1185112081Sdes f = _http_request(URL, "HEAD", us, _http_get_proxy(flags), flags); 1186112081Sdes if (f == NULL) 118790267Sdes return (-1); 118890267Sdes fclose(f); 118990267Sdes return (0); 119040975Sdes} 119141989Sdes 119241989Sdes/* 119341989Sdes * List a directory 119441989Sdes */ 119541989Sdesstruct url_ent * 119685093SdesfetchListHTTP(struct url *url __unused, const char *flags __unused) 119741989Sdes{ 119890267Sdes warnx("fetchListHTTP(): not implemented"); 119990267Sdes return (NULL); 120041989Sdes} 1201