2 * Copyright (c) 1998-2004 Dag-Erling Coïdan Smørgrav
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * $FreeBSD: src/lib/libfetch/fetch.c,v 1.42 2008/12/17 18:00:18 murray Exp $
29 * $DragonFly: src/lib/libfetch/fetch.c,v 1.3 2007/08/05 21:48:12 swildner Exp $
32 #include <sys/param.h>
33 #include <sys/errno.h>
43 auth_t fetchAuthMethod;
45 char fetchLastErrString[MAXERRSTRING];
47 int fetchRestartCalls = 1;
51 /*** Local data **************************************************************/
54 * Error messages for parser errors
56 #define URL_MALFORMED 1
57 #define URL_BAD_SCHEME 2
58 #define URL_BAD_PORT 3
59 static struct fetcherr url_errlist[] = {
60 { URL_MALFORMED, FETCH_URL, "Malformed URL" },
61 { URL_BAD_SCHEME, FETCH_URL, "Invalid URL scheme" },
62 { URL_BAD_PORT, FETCH_URL, "Invalid server port" },
63 { -1, FETCH_UNKNOWN, "Unknown parser error" }
67 /*** Public API **************************************************************/
70 * Select the appropriate protocol for the URL scheme, and return a
71 * read-only stream connected to the document referenced by the URL.
72 * Also fill out the struct url_stat.
75 fetchXGet(struct url *URL, struct url_stat *us, const char *flags)
80 us->atime = us->mtime = 0;
82 if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
83 return (fetchXGetFile(URL, us, flags));
84 else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
85 return (fetchXGetFTP(URL, us, flags));
86 else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
87 return (fetchXGetHTTP(URL, us, flags));
88 else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
89 return (fetchXGetHTTP(URL, us, flags));
90 url_seterr(URL_BAD_SCHEME);
95 * Select the appropriate protocol for the URL scheme, and return a
96 * read-only stream connected to the document referenced by the URL.
99 fetchGet(struct url *URL, const char *flags)
101 return (fetchXGet(URL, NULL, flags));
105 * Select the appropriate protocol for the URL scheme, and return a
106 * write-only stream connected to the document referenced by the URL.
109 fetchPut(struct url *URL, const char *flags)
112 if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
113 return (fetchPutFile(URL, flags));
114 else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
115 return (fetchPutFTP(URL, flags));
116 else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
117 return (fetchPutHTTP(URL, flags));
118 else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
119 return (fetchPutHTTP(URL, flags));
120 url_seterr(URL_BAD_SCHEME);
125 * Select the appropriate protocol for the URL scheme, and return the
126 * size of the document referenced by the URL if it exists.
129 fetchStat(struct url *URL, struct url_stat *us, const char *flags)
134 us->atime = us->mtime = 0;
136 if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
137 return (fetchStatFile(URL, us, flags));
138 else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
139 return (fetchStatFTP(URL, us, flags));
140 else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
141 return (fetchStatHTTP(URL, us, flags));
142 else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
143 return (fetchStatHTTP(URL, us, flags));
144 url_seterr(URL_BAD_SCHEME);
149 * Select the appropriate protocol for the URL scheme, and return a
150 * list of files in the directory pointed to by the URL.
153 fetchList(struct url *URL, const char *flags)
156 if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
157 return (fetchListFile(URL, flags));
158 else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
159 return (fetchListFTP(URL, flags));
160 else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
161 return (fetchListHTTP(URL, flags));
162 else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
163 return (fetchListHTTP(URL, flags));
164 url_seterr(URL_BAD_SCHEME);
169 * Attempt to parse the given URL; if successful, call fetchXGet().
172 fetchXGetURL(const char *URL, struct url_stat *us, const char *flags)
177 if ((u = fetchParseURL(URL)) == NULL)
180 f = fetchXGet(u, us, flags);
187 * Attempt to parse the given URL; if successful, call fetchGet().
190 fetchGetURL(const char *URL, const char *flags)
192 return (fetchXGetURL(URL, NULL, flags));
196 * Attempt to parse the given URL; if successful, call fetchPut().
199 fetchPutURL(const char *URL, const char *flags)
204 if ((u = fetchParseURL(URL)) == NULL)
207 f = fetchPut(u, flags);
214 * Attempt to parse the given URL; if successful, call fetchStat().
217 fetchStatURL(const char *URL, struct url_stat *us, const char *flags)
222 if ((u = fetchParseURL(URL)) == NULL)
225 s = fetchStat(u, us, flags);
232 * Attempt to parse the given URL; if successful, call fetchList().
235 fetchListURL(const char *URL, const char *flags)
240 if ((u = fetchParseURL(URL)) == NULL)
243 ue = fetchList(u, flags);
253 fetchMakeURL(const char *scheme, const char *host, int port, const char *doc,
254 const char *user, const char *pwd)
258 if (!scheme || (!host && !doc)) {
259 url_seterr(URL_MALFORMED);
263 if (port < 0 || port > 65535) {
264 url_seterr(URL_BAD_PORT);
268 /* allocate struct url */
269 if ((u = calloc(1, sizeof(*u))) == NULL) {
274 if ((u->doc = strdup(doc ? doc : "/")) == NULL) {
280 #define seturl(x) snprintf(u->x, sizeof(u->x), "%s", x)
292 * Split an URL into components. URL syntax is:
293 * [method:/][/[user[:pwd]@]host[:port]/][document]
294 * This almost, but not quite, RFC1738 URL syntax.
297 fetchParseURL(const char *URL)
304 /* allocate struct url */
305 if ((u = calloc(1, sizeof(*u))) == NULL) {
311 if ((p = strstr(URL, ":/"))) {
312 snprintf(u->scheme, URL_SCHEMELEN+1,
313 "%.*s", (int)(p - URL), URL);
316 * Only one slash: no host, leave slash as part of document
317 * Two slashes: host follows, strip slashes
324 if (!*URL || *URL == '/' || *URL == '.' ||
325 (u->scheme[0] == '\0' &&
326 strchr(URL, '/') == NULL && strchr(URL, ':') == NULL))
329 p = strpbrk(URL, "/@");
330 if (p && *p == '@') {
332 for (q = URL, i = 0; (*q != ':') && (*q != '@'); q++)
338 for (q++, i = 0; (*q != ':') && (*q != '@'); q++)
349 if (*p == '[' && (q = strchr(p + 1, ']')) != NULL &&
350 (*++q == '\0' || *q == '/' || *q == ':')) {
351 if ((i = q - p - 2) > MAXHOSTNAMELEN)
353 strncpy(u->host, ++p, i);
357 for (i = 0; *p && (*p != '/') && (*p != ':'); p++)
358 if (i < MAXHOSTNAMELEN)
363 for (q = ++p; *q && (*q != '/'); q++)
364 if (isdigit((unsigned char)*q))
365 u->port = u->port * 10 + (*q - '0');
368 url_seterr(URL_BAD_PORT);
379 if (strcasecmp(u->scheme, SCHEME_HTTP) == 0 ||
380 strcasecmp(u->scheme, SCHEME_HTTPS) == 0) {
381 const char hexnums[] = "0123456789abcdef";
383 /* percent-escape whitespace. */
384 if ((doc = malloc(strlen(p) * 3 + 1)) == NULL) {
390 if (!isspace((unsigned char)*p)) {
394 *doc++ = hexnums[((unsigned int)*p) >> 4];
395 *doc++ = hexnums[((unsigned int)*p) & 0xf];
400 } else if ((u->doc = strdup(p)) == NULL) {
405 DEBUG(fprintf(stderr,
412 u->scheme, u->user, u->pwd,
413 u->host, u->port, u->doc));
426 fetchFreeURL(struct url *u)