1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2016 Olaf Wintermann. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "nametrans.h"
30
31 #include "../daemon/log.h"
32 #include "../daemon/request.h"
33 #include "../util/pblock.h"
34 #include "../util/util.h"
35
36 /*
37 * assign_name
38 *
39 * Assigns the name specified by the name parameter if the uri has the
40 * specified prefix.
41 *
42 * pblock parameter:
43 * name object name
44 * from optional uri prefix
45 */
46 int assign_name(pblock *pb, Session *sn, Request *rq) {
47 /* TODO: expression instead of simple prefix */
48
49 char *name = pblock_findkeyval(pb_key_name, pb);
50 char *from = pblock_findkeyval(pb_key_from, pb);
51
52 if(!name) {
53 log_ereport(LOG_MISCONFIG, "assign-name: missing name parameter");
54 protocol_status(sn, rq, 500, NULL);
55 return REQ_ABORTED;
56 }
57
58 if(from) {
59 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
60 char c;
61 int i = 0;
62 while((c = from[i]) != 0) {
63 if(c != uri[i]) {
64 return REQ_NOACTION;
65 }
66 i++;
67 }
68 }
69
70 // add object to rq->vars
71 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
72
73 return REQ_NOACTION;
74 }
75
76 /*
77 * document_root
78 *
79 * Specifies the document root directory.
80 *
81 * pblock parameter:
82 * root path to document root
83 */
84 int document_root(pblock *pb, Session *sn, Request *rq) {
85 char *root = pblock_findkeyval(pb_key_root, pb);
86 if(!root) {
87 log_ereport(LOG_MISCONFIG, "document-root: missing root parameter");
88 protocol_status(sn, rq, 500, NULL);
89 return REQ_ABORTED;
90 }
91
92 sstr_t root_str = sstr(root);
93 sstr_t uri_str = sstr(pblock_findkeyval(pb_key_uri, rq->reqpb));
94
95 request_set_path(root_str, uri_str, rq->vars);
96
97 return REQ_PROCEED;
98 }
99
100 /*
101 * pfx2dir
102 *
103 * ...
104 *
105 * pblock parameter:
106 * from prefix
107 * dir file system directory
108 * name (optional) object name
109 *
110 */
111 int pfx2dir(pblock *pb, Session *sn, Request *rq) {
112 char *from = pblock_findkeyval(pb_key_from, pb);
113 char *dir = pblock_findkeyval(pb_key_dir, pb);
114 char *name = pblock_findkeyval(pb_key_name, pb);
115
116 if(!from || !dir) {
117 if(!from && dir) {
118 log_ereport(LOG_MISCONFIG, "pfx2dir: missing from parameter");
119 } else if(!dir && from) {
120 log_ereport(LOG_MISCONFIG, "pfx2dir: missing dir parameter");
121 } else {
122 log_ereport(
123 LOG_MISCONFIG,
124 "pfx2dir: missing from and dir parameter");
125 }
126 protocol_status(sn, rq, 500, NULL);
127 return REQ_ABORTED;
128 }
129
130 // check prefix
131 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
132 char fc;
133 char uc;
134 int i = 0;
135 while((fc = from[i]) != 0) {
136 uc = uri[i];
137 if(fc != uc) {
138 return REQ_NOACTION;
139 }
140 i++;
141 }
142
143 // url has the specified prefix
144
145 uri = uri + i;
146 if(uri[0] == '/') {
147 uri++;
148 }
149
150 request_set_path(sstr(dir), sstr(uri), rq->vars);
151
152 if(name) {
153 // add object to rq->vars
154 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
155 }
156
157 return REQ_PROCEED;
158 }
159
160
161 int redirect(pblock *pb, Session *sn, Request *rq) {
162 char *from = pblock_findval("from", pb);
163 char *url = pblock_findval("url", pb);
164
165 if(!from || !url) {
166 log_ereport(LOG_MISCONFIG, "redirect: missing parameter (from, url)");
167 return REQ_ABORTED;
168 }
169
170 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
171 if(!strcmp(uri, from)) {
172 pblock_nvinsert("location", url, rq->srvhdrs);
173
174 protocol_status(sn, rq, 302, NULL);
175 return REQ_ABORTED;
176 }
177
178 return REQ_NOACTION;
179 }
180
181 /*
182 * provisional rewrite saf
183 */
184 int simple_rewrite(pblock *pb, Session *sn, Request *rq) {
185 char *from = pblock_findval("from", pb);
186 char *root = pblock_findval("root", pb);
187 char *path = pblock_findval("path", pb);
188 char *name = pblock_findval("name", pb);
189
190 if(!from || !path || !root) {
191 log_ereport(LOG_MISCONFIG, "simple-rewrite: missing parameter (from, root, path)");
192 return REQ_ABORTED;
193 }
194
195 char *uri = pblock_findkeyval(pb_key_uri, rq->reqpb);
196 sstr_t u = sstr(uri);
197 sstr_t f = sstr(from);
198 if(sstrprefix(u, f)) {
199 sstr_t suf = sstrsubs(u, f.length);
200 sstr_t ppath = sstrcat(2, sstr(path), suf);
201
202 request_set_path(sstr(root), ppath, rq->vars);
203 free(ppath.ptr);
204
205 if(name) {
206 // add object to rq->vars
207 pblock_kvinsert(pb_key_name, name, strlen(name), rq->vars);
208 }
209 }
210
211 return REQ_NOACTION;
212 }
213