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-rw-r--r--lib/libfetch/http.c1225
1 files changed, 0 insertions, 1225 deletions
diff --git a/lib/libfetch/http.c b/lib/libfetch/http.c
deleted file mode 100644
index c173b5d5..00000000
--- a/lib/libfetch/http.c
+++ /dev/null
@@ -1,1225 +0,0 @@
-/*-
- * Copyright (c) 2000-2004 Dag-Erling Coïdan Smørgrav
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer
- * in this position and unchanged.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#define _GNU_SOURCE
-
-#include <sys/cdefs.h>
-
-/*
- * The following copyright applies to the base64 code:
- *
- *-
- * Copyright 1997 Massachusetts Institute of Technology
- *
- * Permission to use, copy, modify, and distribute this software and
- * its documentation for any purpose and without fee is hereby
- * granted, provided that both the above copyright notice and this
- * permission notice appear in all copies, that both the above
- * copyright notice and this permission notice appear in all
- * supporting documentation, and that the name of M.I.T. not be used
- * in advertising or publicity pertaining to distribution of the
- * software without specific, written prior permission. M.I.T. makes
- * no representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied
- * warranty.
- *
- * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
- * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
- * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/param.h>
-#include <sys/socket.h>
-
-#include <ctype.h>
-#include <libio.h>
-#include <err.h>
-#include <errno.h>
-#include <locale.h>
-#include <netdb.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-
-#include "fetch.h"
-#include "common.h"
-#include "httperr.h"
-
-/* Maximum number of redirects to follow */
-#define MAX_REDIRECT 5
-
-/* Symbolic names for reply codes we care about */
-#define HTTP_OK 200
-#define HTTP_PARTIAL 206
-#define HTTP_MOVED_PERM 301
-#define HTTP_MOVED_TEMP 302
-#define HTTP_SEE_OTHER 303
-#define HTTP_NEED_AUTH 401
-#define HTTP_NEED_PROXY_AUTH 407
-#define HTTP_BAD_RANGE 416
-#define HTTP_PROTOCOL_ERROR 999
-
-#define HTTP_REDIRECT(xyz) ((xyz) == HTTP_MOVED_PERM \
- || (xyz) == HTTP_MOVED_TEMP \
- || (xyz) == HTTP_SEE_OTHER)
-
-#define HTTP_ERROR(xyz) ((xyz) > 400 && (xyz) < 599)
-
-
-/*****************************************************************************
- * I/O functions for decoding chunked streams
- */
-
-struct httpio
-{
- conn_t *conn; /* connection */
- int chunked; /* chunked mode */
- char *buf; /* chunk buffer */
- size_t bufsize; /* size of chunk buffer */
- ssize_t buflen; /* amount of data currently in buffer */
- int bufpos; /* current read offset in buffer */
- int eof; /* end-of-file flag */
- int error; /* error flag */
- size_t chunksize; /* remaining size of current chunk */
-#ifndef NDEBUG
- size_t total;
-#endif
-};
-
-/*
- * Get next chunk header
- */
-static int
-_http_new_chunk(struct httpio *io)
-{
- char hexdigits[23] = "0123456789abcdefABCDEF\0";
- char *p = NULL;
-
- if (_fetch_getln(io->conn) == -1)
- return (-1);
-
- if (io->conn->buflen < 2 || !strchr(hexdigits, *p))
- return (-1);
-
- for (p = io->conn->buf; *p && !isspace(*p); ++p) {
- if (*p == ';')
- break;
- if (!strchr(hexdigits, *p))
- return (-1);
- if (isdigit(*p)) {
- io->chunksize = io->chunksize * 16 +
- *p - '0';
- } else {
- io->chunksize = io->chunksize * 16 +
- 10 + tolower(*p) - 'a';
- }
- }
-
-#ifndef NDEBUG
- if (fetchDebug) {
- io->total += io->chunksize;
- if (io->chunksize == 0)
- fprintf(stderr, "%s(): end of last chunk\n", __func__);
- else
- fprintf(stderr, "%s(): new chunk: %lu (%lu)\n",
- __func__, (unsigned long)io->chunksize,
- (unsigned long)io->total);
- }
-#endif
-
- return (io->chunksize);
-}
-
-/*
- * Grow the input buffer to at least len bytes
- */
-static inline int
-_http_growbuf(struct httpio *io, size_t len)
-{
- char *tmp;
-
- if (io->bufsize >= len)
- return (0);
-
- if ((tmp = realloc(io->buf, len)) == NULL)
- return (-1);
- io->buf = tmp;
- io->bufsize = len;
- return (0);
-}
-
-/*
- * Fill the input buffer, do chunk decoding on the fly
- */
-static int
-_http_fillbuf(struct httpio *io, size_t len)
-{
- if (io->error)
- return (-1);
- if (io->eof)
- return (0);
-
- if (io->chunked == 0) {
- if (_http_growbuf(io, len) == -1)
- return (-1);
- if ((io->buflen = _fetch_read(io->conn, io->buf, len)) == -1) {
- io->error = 1;
- return (-1);
- }
- io->bufpos = 0;
- return (io->buflen);
- }
-
- if (io->chunksize == 0) {
- switch (_http_new_chunk(io)) {
- case -1:
- io->error = 1;
- return (-1);
- case 0:
- io->eof = 1;
- return (0);
- }
- }
-
- if (len > io->chunksize)
- len = io->chunksize;
- if (_http_growbuf(io, len) == -1)
- return (-1);
- if ((io->buflen = _fetch_read(io->conn, io->buf, len)) == -1) {
- io->error = 1;
- return (-1);
- }
- io->chunksize -= io->buflen;
-
- if (io->chunksize == 0) {
- char endl[2];
-
- if (_fetch_read(io->conn, endl, 2) != 2 ||
- endl[0] != '\r' || endl[1] != '\n')
- return (-1);
- }
-
- io->bufpos = 0;
-
- return (io->buflen);
-}
-
-/*
- * Read function
- */
-static int
-_http_readfn(void *v, char *buf, int len)
-{
- struct httpio *io = (struct httpio *)v;
- int l, pos;
-
- if (io->error)
- return (-1);
- if (io->eof)
- return (0);
-
- for (pos = 0; len > 0; pos += l, len -= l) {
- /* empty buffer */
- if (!io->buf || io->bufpos == io->buflen)
- if (_http_fillbuf(io, len) < 1)
- break;
- l = io->buflen - io->bufpos;
- if (len < l)
- l = len;
- bcopy(io->buf + io->bufpos, buf + pos, l);
- io->bufpos += l;
- }
-
- if (!pos && io->error)
- return (-1);
- return (pos);
-}
-
-/*
- * Write function
- */
-static int
-_http_writefn(void *v, const char *buf, int len)
-{
- struct httpio *io = (struct httpio *)v;
-
- return (_fetch_write(io->conn, buf, len));
-}
-
-/*
- * Close function
- */
-static int
-_http_closefn(void *v)
-{
- struct httpio *io = (struct httpio *)v;
- int r;
-
- r = _fetch_close(io->conn);
- if (io->buf)
- free(io->buf);
- free(io);
- return (r);
-}
-
-/*
- * Wrap a file descriptor up
- */
-static FILE *
-_http_funopen(conn_t *conn, int chunked)
-{
- struct httpio *io;
- FILE *f;
-
- if ((io = calloc(1, sizeof(*io))) == NULL) {
- _fetch_syserr();
- return (NULL);
- }
- io->conn = conn;
- io->chunked = chunked;
- cookie_io_functions_t cookie;
- cookie.read = (cookie_read_function_t *)_http_readfn;
- cookie.write = (cookie_write_function_t *)_http_writefn;
- cookie.seek = (cookie_seek_function_t *)NULL;
- cookie.close = (cookie_close_function_t *)_http_closefn;
- f = fopencookie(io, "rw", cookie);
- if (f == NULL) {
- _fetch_syserr();
- free(io);
- return (NULL);
- }
- return (f);
-}
-
-
-/*****************************************************************************
- * Helper functions for talking to the server and parsing its replies
- */
-
-/* Header types */
-typedef enum {
- hdr_syserror = -2,
- hdr_error = -1,
- hdr_end = 0,
- hdr_unknown = 1,
- hdr_content_length,
- hdr_content_range,
- hdr_last_modified,
- hdr_location,
- hdr_transfer_encoding,
- hdr_www_authenticate
-} hdr_t;
-
-/* Names of interesting headers */
-static struct {
- hdr_t num;
- const char *name;
-} hdr_names[] = {
- { hdr_content_length, "Content-Length" },
- { hdr_content_range, "Content-Range" },
- { hdr_last_modified, "Last-Modified" },
- { hdr_location, "Location" },
- { hdr_transfer_encoding, "Transfer-Encoding" },
- { hdr_www_authenticate, "WWW-Authenticate" },
- { hdr_unknown, NULL },
-};
-
-/*
- * Send a formatted line; optionally echo to terminal
- */
-static int
-_http_cmd(conn_t *conn, const char *fmt, ...)
-{
- va_list ap;
- size_t len;
- char *msg;
- int r;
-
- va_start(ap, fmt);
- len = vasprintf(&msg, fmt, ap);
- va_end(ap);
-
- if (msg == NULL) {
- errno = ENOMEM;
- _fetch_syserr();
- return (-1);
- }
-
- r = _fetch_putln(conn, msg, len);
- free(msg);
-
- if (r == -1) {
- _fetch_syserr();
- return (-1);
- }
-
- return (0);
-}
-
-/*
- * Get and parse status line
- */
-static int
-_http_get_reply(conn_t *conn)
-{
- char *p;
-
- if (_fetch_getln(conn) == -1)
- return (-1);
- /*
- * A valid status line looks like "HTTP/m.n xyz reason" where m
- * and n are the major and minor protocol version numbers and xyz
- * is the reply code.
- * Unfortunately, there are servers out there (NCSA 1.5.1, to name
- * just one) that do not send a version number, so we can't rely
- * on finding one, but if we do, insist on it being 1.0 or 1.1.
- * We don't care about the reason phrase.
- */
- if (strncmp(conn->buf, "HTTP", 4) != 0)
- return (HTTP_PROTOCOL_ERROR);
- p = conn->buf + 4;
- if (*p == '/') {
- if (p[1] != '1' || p[2] != '.' || (p[3] != '0' && p[3] != '1'))
- return (HTTP_PROTOCOL_ERROR);
- p += 4;
- }
- if (*p != ' ' || !isdigit(p[1]) || !isdigit(p[2]) || !isdigit(p[3]))
- return (HTTP_PROTOCOL_ERROR);
-
- conn->err = (p[1] - '0') * 100 + (p[2] - '0') * 10 + (p[3] - '0');
- return (conn->err);
-}
-
-/*
- * Check a header; if the type matches the given string, return a pointer
- * to the beginning of the value.
- */
-static const char *
-_http_match(const char *str, const char *hdr)
-{
- while (*str && *hdr && tolower(*str++) == tolower(*hdr++))
- /* nothing */;
- if (*str || *hdr != ':')
- return (NULL);
- while (*hdr && isspace(*++hdr))
- /* nothing */;
- return (hdr);
-}
-
-/*
- * Get the next header and return the appropriate symbolic code.
- */
-static hdr_t
-_http_next_header(conn_t *conn, const char **p)
-{
- int i;
-
- if (_fetch_getln(conn) == -1)
- return (hdr_syserror);
- while (conn->buflen && isspace(conn->buf[conn->buflen - 1]))
- conn->buflen--;
- conn->buf[conn->buflen] = '\0';
- if (conn->buflen == 0)
- return (hdr_end);
- /*
- * We could check for malformed headers but we don't really care.
- * A valid header starts with a token immediately followed by a
- * colon; a token is any sequence of non-control, non-whitespace
- * characters except "()<>@,;:\\\"{}".
- */
- for (i = 0; hdr_names[i].num != hdr_unknown; i++)
- if ((*p = _http_match(hdr_names[i].name, conn->buf)) != NULL)
- return (hdr_names[i].num);
- return (hdr_unknown);
-}
-
-/*
- * Parse a last-modified header
- */
-static int
-_http_parse_mtime(const char *p, time_t *mtime)
-{
- char locale[64], *r;
- struct tm tm;
-
- strncpy(locale, setlocale(LC_TIME, NULL), sizeof(locale));
- setlocale(LC_TIME, "C");
- r = (char *)strptime(p, "%a, %d %b %Y %H:%M:%S GMT", &tm);
- /* XXX should add support for date-2 and date-3 */
- setlocale(LC_TIME, locale);
- if (r == NULL)
- return (-1);
- DEBUG(fprintf(stderr, "last modified: [%04d-%02d-%02d "
- "%02d:%02d:%02d]\n",
- tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
- tm.tm_hour, tm.tm_min, tm.tm_sec));
- *mtime = timegm(&tm);
- return (0);
-}
-
-/*
- * Parse a content-length header
- */
-static int
-_http_parse_length(const char *p, off_t *length)
-{
- off_t len;
-
- for (len = 0; *p && isdigit(*p); ++p)
- len = len * 10 + (*p - '0');
- if (*p)
- return (-1);
- DEBUG(fprintf(stderr, "content length: [%lld]\n",
- (long long)len));
- *length = len;
- return (0);
-}
-
-/*
- * Parse a content-range header
- */
-static int
-_http_parse_range(const char *p, off_t *offset, off_t *length, off_t *size)
-{
- off_t first, last, len;
-
- if (strncasecmp(p, "bytes ", 6) != 0)
- return (-1);
- p += 6;
- if (*p == '*') {
- first = last = -1;
- ++p;
- } else {
- for (first = 0; *p && isdigit(*p); ++p)
- first = first * 10 + *p - '0';
- if (*p != '-')
- return (-1);
- for (last = 0, ++p; *p && isdigit(*p); ++p)
- last = last * 10 + *p - '0';
- }
- if (first > last || *p != '/')
- return (-1);
- for (len = 0, ++p; *p && isdigit(*p); ++p)
- len = len * 10 + *p - '0';
- if (*p || len < last - first + 1)
- return (-1);
- if (first == -1) {
- DEBUG(fprintf(stderr, "content range: [*/%lld]\n",
- (long long)len));
- *length = 0;
- } else {
- DEBUG(fprintf(stderr, "content range: [%lld-%lld/%lld]\n",
- (long long)first, (long long)last, (long long)len));
- *length = last - first + 1;
- }
- *offset = first;
- *size = len;
- return (0);
-}
-
-
-/*****************************************************************************
- * Helper functions for authorization
- */
-
-/*
- * Base64 encoding
- */
-static char *
-_http_base64(const char *src)
-{
- static const char base64[] =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
- "abcdefghijklmnopqrstuvwxyz"
- "0123456789+/";
- char *str, *dst;
- size_t l;
- int t, r;
-
- l = strlen(src);
- if ((str = malloc(((l + 2) / 3) * 4 + 1)) == NULL)
- return (NULL);
- dst = str;
- r = 0;
-
- while (l >= 3) {
- t = (src[0] << 16) | (src[1] << 8) | src[2];
- dst[0] = base64[(t >> 18) & 0x3f];
- dst[1] = base64[(t >> 12) & 0x3f];
- dst[2] = base64[(t >> 6) & 0x3f];
- dst[3] = base64[(t >> 0) & 0x3f];
- src += 3; l -= 3;
- dst += 4; r += 4;
- }
-
- switch (l) {
- case 2:
- t = (src[0] << 16) | (src[1] << 8);
- dst[0] = base64[(t >> 18) & 0x3f];
- dst[1] = base64[(t >> 12) & 0x3f];
- dst[2] = base64[(t >> 6) & 0x3f];
- dst[3] = '=';
- dst += 4;
- r += 4;
- break;
- case 1:
- t = src[0] << 16;
- dst[0] = base64[(t >> 18) & 0x3f];
- dst[1] = base64[(t >> 12) & 0x3f];
- dst[2] = dst[3] = '=';
- dst += 4;
- r += 4;
- break;
- case 0:
- break;
- }
-
- *dst = 0;
- return (str);
-}
-
-/*
- * Encode username and password
- */
-static int
-_http_basic_auth(conn_t *conn, const char *hdr, const char *usr, const char *pwd)
-{
- char *upw, *auth;
- int r;
-
- DEBUG(fprintf(stderr, "usr: [%s]\n", usr));
- DEBUG(fprintf(stderr, "pwd: [%s]\n", pwd));
- if (asprintf(&upw, "%s:%s", usr, pwd) == -1)
- return (-1);
- auth = _http_base64(upw);
- free(upw);
- if (auth == NULL)
- return (-1);
- r = _http_cmd(conn, "%s: Basic %s", hdr, auth);
- free(auth);
- return (r);
-}
-
-/*
- * Send an authorization header
- */
-static int
-_http_authorize(conn_t *conn, const char *hdr, const char *p)
-{
- /* basic authorization */
- if (strncasecmp(p, "basic:", 6) == 0) {
- char *user, *pwd, *str;
- int r;
-
- /* skip realm */
- for (p += 6; *p && *p != ':'; ++p)
- /* nothing */ ;
- if (!*p || strchr(++p, ':') == NULL)
- return (-1);
- if ((str = strdup(p)) == NULL)
- return (-1); /* XXX */
- user = str;
- pwd = strchr(str, ':');
- *pwd++ = '\0';
- r = _http_basic_auth(conn, hdr, user, pwd);
- free(str);
- return (r);
- }
- return (-1);
-}
-
-
-/*****************************************************************************
- * Helper functions for connecting to a server or proxy
- */
-
-/*
- * Connect to the correct HTTP server or proxy.
- */
-static conn_t *
-_http_connect(struct url *URL, struct url *purl, const char *flags)
-{
- conn_t *conn;
- int verbose;
- int af;
-
-#ifdef INET6
- af = AF_UNSPEC;
-#else
- af = AF_INET;
-#endif
-
- verbose = CHECK_FLAG('v');
- if (CHECK_FLAG('4'))
- af = AF_INET;
-#ifdef INET6
- else if (CHECK_FLAG('6'))
- af = AF_INET6;
-#endif
-
- if (purl && strcasecmp(URL->scheme, SCHEME_HTTPS) != 0) {
- URL = purl;
- } else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0) {
- /* can't talk http to an ftp server */
- /* XXX should set an error code */
- return (NULL);
- }
-
- if ((conn = _fetch_connect(URL->host, URL->port, af, verbose)) == NULL)
- /* _fetch_connect() has already set an error code */
- return (NULL);
- if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0 &&
- _fetch_ssl(conn, verbose) == -1) {
- _fetch_close(conn);
- /* grrr */
- _fetch_syserr();
- return (NULL);
- }
-
-#ifdef TCP_NOPUSH
- int val = 1;
- setsockopt(conn->sd, IPPROTO_TCP, TCP_NOPUSH, &val, sizeof(val));
-#endif
-
- return (conn);
-}
-
-static struct url *
-_http_get_proxy(const char *flags)
-{
- struct url *purl;
- char *p;
-
- if (flags != NULL && strchr(flags, 'd') != NULL)
- return (NULL);
- if (((p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) &&
- *p && (purl = fetchParseURL(p))) {
- if (!*purl->scheme)
- strcpy(purl->scheme, SCHEME_HTTP);
- if (!purl->port)
- purl->port = _fetch_default_proxy_port(purl->scheme);
- if (strcasecmp(purl->scheme, SCHEME_HTTP) == 0)
- return (purl);
- fetchFreeURL(purl);
- }
- return (NULL);
-}
-
-static void
-_http_print_html(FILE *out, FILE *in)
-{
- size_t len;
- unsigned int sz = 1024;
- char *line, *p, *q;
- int comment, tag;
-
- line = (char *)calloc(1024, sizeof(char));
- comment = tag = 0;
- while ((len = getline(&line, &sz, in)) > 0) {
- while (len && isspace(line[len - 1]))
- --len;
- for (p = q = line; q < line + len; ++q) {
- if (comment && *q == '-') {
- if (q + 2 < line + len &&
- strcmp(q, "-->") == 0) {
- tag = comment = 0;
- q += 2;
- }
- } else if (tag && !comment && *q == '>') {
- p = q + 1;
- tag = 0;
- } else if (!tag && *q == '<') {
- if (q > p)
- fwrite(p, q - p, 1, out);
- tag = 1;
- if (q + 3 < line + len &&
- strcmp(q, "<!--") == 0) {
- comment = 1;
- q += 3;
- }
- }
- }
- if (!tag && q > p)
- fwrite(p, q - p, 1, out);
- fputc('\n', out);
- }
-}
-
-
-/*****************************************************************************
- * Core
- */
-
-/*
- * Send a request and process the reply
- *
- * XXX This function is way too long, the do..while loop should be split
- * XXX off into a separate function.
- */
-FILE *
-_http_request(struct url *URL, const char *op, struct url_stat *us,
- struct url *purl, const char *flags)
-{
- conn_t *conn;
- struct url *url, *new;
- int chunked, direct, need_auth, noredirect, verbose;
- int e, i, n, val;
- off_t offset, clength, length, size;
- time_t mtime;
- const char *p;
- FILE *f;
- hdr_t h;
- char hbuf[MAXHOSTNAMELEN + 7], *host;
-
- direct = CHECK_FLAG('d');
- noredirect = CHECK_FLAG('A');
- verbose = CHECK_FLAG('v');
-
- if (direct && purl) {
- fetchFreeURL(purl);
- purl = NULL;
- }
-
- /* try the provided URL first */
- url = URL;
-
- /* if the A flag is set, we only get one try */
- n = noredirect ? 1 : MAX_REDIRECT;
- i = 0;
-
- e = HTTP_PROTOCOL_ERROR;
- need_auth = 0;
- do {
- new = NULL;
- chunked = 0;
- offset = 0;
- clength = -1;
- length = -1;
- size = -1;
- mtime = 0;
-
- /* check port */
- if (!url->port)
- url->port = _fetch_default_port(url->scheme);
-
- /* were we redirected to an FTP URL? */
- if (purl == NULL && strcmp(url->scheme, SCHEME_FTP) == 0) {
- if (strcmp(op, "GET") == 0)
- return (_ftp_request(url, "RETR", us, purl, flags));
- else if (strcmp(op, "HEAD") == 0)
- return (_ftp_request(url, "STAT", us, purl, flags));
- }
-
- /* connect to server or proxy */
- if ((conn = _http_connect(url, purl, flags)) == NULL)
- goto ouch;
-
- host = url->host;
-#ifdef INET6
- if (strchr(url->host, ':')) {
- snprintf(hbuf, sizeof(hbuf), "[%s]", url->host);
- host = hbuf;
- }
-#endif
- if (url->port != _fetch_default_port(url->scheme)) {
- if (host != hbuf) {
- strcpy(hbuf, host);
- host = hbuf;
- }
- snprintf(hbuf + strlen(hbuf),
- sizeof(hbuf) - strlen(hbuf), ":%d", url->port);
- }
-
- /* send request */
- if (verbose)
- _fetch_info("requesting %s://%s%s",
- url->scheme, host, url->doc);
- if (purl) {
- _http_cmd(conn, "%s %s://%s%s HTTP/1.1",
- op, url->scheme, host, url->doc);
- } else {
- _http_cmd(conn, "%s %s HTTP/1.1",
- op, url->doc);
- }
-
- /* virtual host */
- _http_cmd(conn, "Host: %s", host);
-
- /* proxy authorization */
- if (purl) {
- if (*purl->user || *purl->pwd)
- _http_basic_auth(conn, "Proxy-Authorization",
- purl->user, purl->pwd);
- else if ((p = getenv("HTTP_PROXY_AUTH")) != NULL && *p != '\0')
- _http_authorize(conn, "Proxy-Authorization", p);
- }
-
- /* server authorization */
- if (need_auth || *url->user || *url->pwd) {
- if (*url->user || *url->pwd)
- _http_basic_auth(conn, "Authorization", url->user, url->pwd);
- else if ((p = getenv("HTTP_AUTH")) != NULL && *p != '\0')
- _http_authorize(conn, "Authorization", p);
- else if (fetchAuthMethod && fetchAuthMethod(url) == 0) {
- _http_basic_auth(conn, "Authorization", url->user, url->pwd);
- } else {
- _http_seterr(HTTP_NEED_AUTH);
- goto ouch;
- }
- }
-
- /* other headers */
- if ((p = getenv("HTTP_REFERER")) != NULL && *p != '\0') {
- if (strcasecmp(p, "auto") == 0)
- _http_cmd(conn, "Referer: %s://%s%s",
- url->scheme, host, url->doc);
- else
- _http_cmd(conn, "Referer: %s", p);
- }
- if ((p = getenv("HTTP_USER_AGENT")) != NULL && *p != '\0')
- _http_cmd(conn, "User-Agent: %s", p);
- else
- _http_cmd(conn, "User-Agent: " _LIBFETCH_VER);
- if (url->offset > 0)
- _http_cmd(conn, "Range: bytes=%lld-", (long long)url->offset);
- _http_cmd(conn, "Connection: close");
- _http_cmd(conn, "");
-
- /*
- * Force the queued request to be dispatched. Normally, one
- * would do this with shutdown(2) but squid proxies can be
- * configured to disallow such half-closed connections. To
- * be compatible with such configurations, fiddle with socket
- * options to force the pending data to be written.
- */
-#ifdef TCP_NOPUSH
- val = 0;
- setsockopt(conn->sd, IPPROTO_TCP, TCP_NOPUSH, &val,
- sizeof(val));
-#endif
- val = 1;
- setsockopt(conn->sd, IPPROTO_TCP, TCP_NODELAY, &val,
- sizeof(val));
-
- /* get reply */
- switch (_http_get_reply(conn)) {
- case HTTP_OK:
- case HTTP_PARTIAL:
- /* fine */
- break;
- case HTTP_MOVED_PERM:
- case HTTP_MOVED_TEMP:
- case HTTP_SEE_OTHER:
- /*
- * Not so fine, but we still have to read the
- * headers to get the new location.
- */
- break;
- case HTTP_NEED_AUTH:
- if (need_auth) {
- /*
- * We already sent out authorization code,
- * so there's nothing more we can do.
- */
- _http_seterr(conn->err);
- goto ouch;
- }
- /* try again, but send the password this time */
- if (verbose)
- _fetch_info("server requires authorization");
- break;
- case HTTP_NEED_PROXY_AUTH:
- /*
- * If we're talking to a proxy, we already sent
- * our proxy authorization code, so there's
- * nothing more we can do.
- */
- _http_seterr(conn->err);
- goto ouch;
- case HTTP_BAD_RANGE:
- /*
- * This can happen if we ask for 0 bytes because
- * we already have the whole file. Consider this
- * a success for now, and check sizes later.
- */
- break;
- case HTTP_PROTOCOL_ERROR:
- /* fall through */
- case -1:
- _fetch_syserr();
- goto ouch;
- default:
- _http_seterr(conn->err);
- goto ouch;
- /* fall through so we can get the full error message */
- }
-
- /* get headers */
- do {
- switch ((h = _http_next_header(conn, &p))) {
- case hdr_syserror:
- _fetch_syserr();
- goto ouch;
- case hdr_error:
- _http_seterr(HTTP_PROTOCOL_ERROR);
- goto ouch;
- case hdr_content_length:
- _http_parse_length(p, &clength);
- break;
- case hdr_content_range:
- _http_parse_range(p, &offset, &length, &size);
- break;
- case hdr_last_modified:
- _http_parse_mtime(p, &mtime);
- break;
- case hdr_location:
- if (!HTTP_REDIRECT(conn->err))
- break;
- if (new)
- free(new);
- if (verbose)
- _fetch_info("%d redirect to %s", conn->err, p);
- if (*p == '/')
- /* absolute path */
- new = fetchMakeURL(url->scheme, url->host, url->port, p,
- url->user, url->pwd);
- else
- new = fetchParseURL(p);
- if (new == NULL) {
- /* XXX should set an error code */
- DEBUG(fprintf(stderr, "failed to parse new URL\n"));
- goto ouch;
- }
- if (!*new->user && !*new->pwd) {
- strcpy(new->user, url->user);
- strcpy(new->pwd, url->pwd);
- }
- new->offset = url->offset;
- new->length = url->length;
- break;
- case hdr_transfer_encoding:
- /* XXX weak test*/
- chunked = (strcasecmp(p, "chunked") == 0);
- break;
- case hdr_www_authenticate:
- if (conn->err != HTTP_NEED_AUTH)
- break;
- /* if we were smarter, we'd check the method and realm */
- break;
- case hdr_end:
- /* fall through */
- case hdr_unknown:
- /* ignore */
- break;
- }
- } while (h > hdr_end);
-
- /* we need to provide authentication */
- if (conn->err == HTTP_NEED_AUTH) {
- e = conn->err;
- need_auth = 1;
- _fetch_close(conn);
- conn = NULL;
- continue;
- }
-
- /* requested range not satisfiable */
- if (conn->err == HTTP_BAD_RANGE) {
- if (url->offset == size && url->length == 0) {
- /* asked for 0 bytes; fake it */
- offset = url->offset;
- conn->err = HTTP_OK;
- break;
- } else {
- _http_seterr(conn->err);
- goto ouch;
- }
- }
-
- /* we have a hit or an error */
- if (conn->err == HTTP_OK || conn->err == HTTP_PARTIAL || HTTP_ERROR(conn->err))
- break;
-
- /* all other cases: we got a redirect */
- e = conn->err;
- need_auth = 0;
- _fetch_close(conn);
- conn = NULL;
- if (!new) {
- DEBUG(fprintf(stderr, "redirect with no new location\n"));
- break;
- }
- if (url != URL)
- fetchFreeURL(url);
- url = new;
- } while (++i < n);
-
- /* we failed, or ran out of retries */
- if (conn == NULL) {
- _http_seterr(e);
- goto ouch;
- }
-
- DEBUG(fprintf(stderr, "offset %lld, length %lld,"
- " size %lld, clength %lld\n",
- (long long)offset, (long long)length,
- (long long)size, (long long)clength));
-
- /* check for inconsistencies */
- if (clength != -1 && length != -1 && clength != length) {
- _http_seterr(HTTP_PROTOCOL_ERROR);
- goto ouch;
- }
- if (clength == -1)
- clength = length;
- if (clength != -1)
- length = offset + clength;
- if (length != -1 && size != -1 && length != size) {
- _http_seterr(HTTP_PROTOCOL_ERROR);
- goto ouch;
- }
- if (size == -1)
- size = length;
-
- /* fill in stats */
- if (us) {
- us->size = size;
- us->atime = us->mtime = mtime;
- }
-
- /* too far? */
- if (URL->offset > 0 && offset > URL->offset) {
- _http_seterr(HTTP_PROTOCOL_ERROR);
- goto ouch;
- }
-
- /* report back real offset and size */
- URL->offset = offset;
- URL->length = clength;
-
- /* wrap it up in a FILE */
- if ((f = _http_funopen(conn, chunked)) == NULL) {
- _fetch_syserr();
- goto ouch;
- }
-
- if (url != URL)
- fetchFreeURL(url);
- if (purl)
- fetchFreeURL(purl);
-
- if (HTTP_ERROR(conn->err)) {
- _http_print_html(stderr, f);
- fclose(f);
- f = NULL;
- }
-
- return (f);
-
-ouch:
- if (url != URL)
- fetchFreeURL(url);
- if (purl)
- fetchFreeURL(purl);
- if (conn != NULL)
- _fetch_close(conn);
- return (NULL);
-}
-
-
-/*****************************************************************************
- * Entry points
- */
-
-/*
- * Retrieve and stat a file by HTTP
- */
-FILE *
-fetchXGetHTTP(struct url *URL, struct url_stat *us, const char *flags)
-{
- return (_http_request(URL, "GET", us, _http_get_proxy(flags), flags));
-}
-
-/*
- * Retrieve a file by HTTP
- */
-FILE *
-fetchGetHTTP(struct url *URL, const char *flags)
-{
- return (fetchXGetHTTP(URL, NULL, flags));
-}
-
-/*
- * Store a file by HTTP
- */
-FILE *
-fetchPutHTTP(struct url *URL, const char *flags)
-{
- warnx("fetchPutHTTP(): not implemented");
- return (NULL);
-}
-
-/*
- * Get an HTTP document's metadata
- */
-int
-fetchStatHTTP(struct url *URL, struct url_stat *us, const char *flags)
-{
- FILE *f;
-
- f = _http_request(URL, "HEAD", us, _http_get_proxy(flags), flags);
- if (f == NULL)
- return (-1);
- fclose(f);
- return (0);
-}
-
-/*
- * List a directory
- */
-struct url_ent *
-fetchListHTTP(struct url *url, const char *flags)
-{
- warnx("fetchListHTTP(): not implemented");
- return (NULL);
-}