Merge branch 'master' of git.dolda2000.com:/srv/git/r/ashd
[ashd.git] / lib / req.c
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1/*
2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17*/
18
19#include <stdlib.h>
20#include <string.h>
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21#include <unistd.h>
22#include <sys/socket.h>
23#include <errno.h>
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24#include <ctype.h>
25#include <stdio.h>
470938bd 26#include <fcntl.h>
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27
28#ifdef HAVE_CONFIG_H
29#include <config.h>
30#endif
31#include <utils.h>
41213112 32#include <log.h>
33733396 33#include <req.h>
41213112 34#include <proc.h>
33733396 35
41213112 36struct hthead *mkreq(char *method, char *url, char *ver)
33733396 37{
41213112 38 struct hthead *req;
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39
40 omalloc(req);
41 req->method = sstrdup(method);
42 req->url = sstrdup(url);
43 req->ver = sstrdup(ver);
41213112 44 req->rest = sstrdup(url);
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45 return(req);
46}
47
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48struct hthead *mkresp(int code, char *msg, char *ver)
49{
50 struct hthead *resp;
51
52 omalloc(resp);
53 resp->code = code;
54 resp->msg = sstrdup(msg);
55 resp->ver = sstrdup(ver);
56 return(resp);
57}
58
59void freehthead(struct hthead *head)
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60{
61 int i;
62
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63 if(head->method != NULL)
64 free(head->method);
65 if(head->url != NULL)
66 free(head->url);
67 if(head->msg != NULL)
68 free(head->msg);
69 if(head->ver != NULL)
70 free(head->ver);
71 if(head->rest != NULL)
72 free(head->rest);
73 if(head->headers) {
74 for(i = 0; i < head->noheaders; i++) {
75 free(head->headers[i][0]);
76 free(head->headers[i][1]);
77 free(head->headers[i]);
33733396 78 }
41213112 79 free(head->headers);
33733396 80 }
41213112 81 free(head);
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82}
83
41213112 84char *getheader(struct hthead *head, char *name)
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85{
86 int i;
87
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88 for(i = 0; i < head->noheaders; i++) {
89 if(!strcasecmp(head->headers[i][0], name))
90 return(head->headers[i][1]);
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91 }
92 return(NULL);
93}
94
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95static void trim(struct charbuf *buf)
96{
97 char *p;
98
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99 for(p = buf->b; (p - buf->b < buf->d) && isspace(*p); p++);
100 memmove(buf->b, p, buf->d -= (p - buf->b));
101 if(buf->d > 0)
c7b1ef35 102 for(p = buf->b + buf->d - 1; (p > buf->b) && isspace(*p); p--, buf->d--);
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103}
104
105int parseheaders(struct hthead *head, FILE *in)
106{
107 int c, state;
108 struct charbuf name, val;
90b0ba0f 109 size_t tsz;
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110
111 bufinit(name);
112 bufinit(val);
113 state = 0;
90b0ba0f 114 tsz = 0;
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115 while(1) {
116 c = fgetc(in);
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117 if(++tsz >= 65536)
118 goto fail;
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119 again:
120 if(state == 0) {
121 if(c == '\r') {
122 } else if(c == '\n') {
123 break;
124 } else if(c == EOF) {
125 goto fail;
126 } else {
127 state = 1;
128 goto again;
129 }
130 } else if(state == 1) {
131 if(c == ':') {
132 trim(&name);
133 bufadd(name, 0);
134 state = 2;
135 } else if(c == '\r') {
136 } else if(c == '\n') {
137 goto fail;
138 } else if(c == EOF) {
139 goto fail;
140 } else {
141 bufadd(name, c);
142 }
143 } else if(state == 2) {
144 if(c == '\r') {
145 } else if(c == '\n') {
146 trim(&val);
147 bufadd(val, 0);
148 headappheader(head, name.b, val.b);
149 buffree(name);
150 buffree(val);
151 state = 0;
152 } else if(c == EOF) {
153 goto fail;
154 } else {
155 bufadd(val, c);
156 }
157 }
158 }
159 return(0);
160
161fail:
162 buffree(name);
163 buffree(val);
164 return(-1);
165}
166
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167struct hthead *parseresponse(FILE *in)
168{
169 struct hthead *req;
170 int code;
171 struct charbuf ver, msg;
172 int c;
173
174 req = NULL;
175 bufinit(ver);
176 bufinit(msg);
177 code = 0;
178 while(1) {
179 c = getc(in);
180 if(c == ' ') {
181 break;
182 } else if((c == EOF) || (c < 32) || (c >= 128)) {
183 goto fail;
184 } else {
185 bufadd(ver, c);
186 if(ver.d >= 128)
187 goto fail;
188 }
189 }
190 while(1) {
191 c = getc(in);
192 if(c == ' ') {
193 break;
194 } else if((c == EOF) || (c < '0') || (c > '9')) {
195 goto fail;
196 } else {
197 code = (code * 10) + (c - '0');
198 if(code >= 10000)
199 goto fail;
200 }
201 }
202 while(1) {
203 c = getc(in);
204 if(c == 10) {
205 break;
206 } else if(c == 13) {
207 } else if((c == EOF) || (c < 32)) {
208 goto fail;
209 } else {
210 bufadd(msg, c);
211 if(msg.d >= 512)
212 goto fail;
213 }
214 }
215 bufadd(msg, 0);
216 bufadd(ver, 0);
217 req = mkresp(code, msg.b, ver.b);
218 if(parseheaders(req, in))
219 goto fail;
220 goto out;
221
222fail:
223 if(req != NULL) {
224 freehthead(req);
225 req = NULL;
226 }
227out:
228 buffree(msg);
229 buffree(ver);
230 return(req);
231}
232
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233void replrest(struct hthead *head, char *rest)
234{
235 char *tmp;
236
237 /* Do not free the current rest string yet, so that the new one
5fc1bf9f 238 * can be taken from a subpart of the old one. */
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239 tmp = head->rest;
240 head->rest = sstrdup(rest);
241 free(tmp);
242}
243
41213112 244void headpreheader(struct hthead *head, const char *name, const char *val)
33733396 245{
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246 head->headers = srealloc(head->headers, sizeof(*head->headers) * (head->noheaders + 1));
247 memmove(head->headers + 1, head->headers, sizeof(*head->headers) * head->noheaders);
248 head->noheaders++;
249 head->headers[0] = smalloc(sizeof(*head->headers[0]) * 2);
250 head->headers[0][0] = sstrdup(name);
251 head->headers[0][1] = sstrdup(val);
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252}
253
41213112 254void headappheader(struct hthead *head, const char *name, const char *val)
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255{
256 int i;
257
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258 i = head->noheaders++;
259 head->headers = srealloc(head->headers, sizeof(*head->headers) * head->noheaders);
260 head->headers[i] = smalloc(sizeof(*head->headers[i]) * 2);
261 head->headers[i][0] = sstrdup(name);
262 head->headers[i][1] = sstrdup(val);
263}
264
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265void headrmheader(struct hthead *head, const char *name)
266{
267 int i;
268
269 for(i = 0; i < head->noheaders; i++) {
270 if(!strcasecmp(head->headers[i][0], name)) {
271 free(head->headers[i][0]);
272 free(head->headers[i][1]);
273 free(head->headers[i]);
608f4ac7 274 memmove(head->headers + i, head->headers + i + 1, sizeof(head->headers) * (--head->noheaders - i));
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275 return;
276 }
277 }
278}
279
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280int writeresp(FILE *out, struct hthead *resp)
281{
282 int i;
283
284 if(fprintf(out, "%s %i %s\r\n", resp->ver, resp->code, resp->msg) < 0)
285 return(-1);
286 for(i = 0; i < resp->noheaders; i++) {
287 if(fprintf(out, "%s: %s\r\n", resp->headers[i][0], resp->headers[i][1]) < 0)
288 return(-1);
289 }
290 return(0);
291}
292
af34331c 293int sendreq(int sock, struct hthead *req, int fd)
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294{
295 int ret, i;
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296 struct charbuf buf;
297
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298 bufinit(buf);
299 bufcatstr2(buf, req->method);
300 bufcatstr2(buf, req->url);
301 bufcatstr2(buf, req->ver);
302 bufcatstr2(buf, req->rest);
303 for(i = 0; i < req->noheaders; i++) {
304 bufcatstr2(buf, req->headers[i][0]);
305 bufcatstr2(buf, req->headers[i][1]);
306 }
307 bufcatstr2(buf, "");
af34331c 308 ret = sendfd(sock, fd, buf.b, buf.d);
41213112 309 buffree(buf);
af34331c 310 if(ret < 0)
41213112 311 return(-1);
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312 else
313 return(0);
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314}
315
316int recvreq(int sock, struct hthead **reqp)
317{
318 int fd;
319 struct charbuf buf;
320 char *p;
321 size_t l;
322 char *name, *val;
323 struct hthead *req;
324
325 if((fd = recvfd(sock, &buf.b, &buf.d)) < 0) {
326 return(-1);
327 }
470938bd 328 fcntl(fd, F_SETFD, FD_CLOEXEC);
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329 buf.s = buf.d;
330 p = buf.b;
331 l = buf.d;
332
333 *reqp = omalloc(req);
334 if((req->method = sstrdup(decstr(&p, &l))) == NULL)
335 goto fail;
336 if((req->url = sstrdup(decstr(&p, &l))) == NULL)
337 goto fail;
338 if((req->ver = sstrdup(decstr(&p, &l))) == NULL)
339 goto fail;
340 if((req->rest = sstrdup(decstr(&p, &l))) == NULL)
341 goto fail;
342
343 while(1) {
344 if(!*(name = decstr(&p, &l)))
345 break;
346 val = decstr(&p, &l);
347 headappheader(req, name, val);
348 }
349
350 buffree(buf);
351 return(fd);
352
353fail:
354 close(fd);
355 freehthead(req);
356 errno = EPROTO;
357 return(-1);
33733396 358}
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359
360char *unquoteurl(char *in)
361{
362 struct charbuf buf;
363 char *p;
364 int c;
365
366 bufinit(buf);
367 p = in;
368 while(*p) {
369 if(*p == '%') {
370 if(!p[1] || !p[2])
371 goto fail;
372 c = 0;
373 if((p[1] >= '0') && (p[1] <= '9')) c |= (p[1] - '0') << 4;
374 else if((p[1] >= 'a') && (p[1] <= 'f')) c |= (p[1] - 'a' + 10) << 4;
375 else if((p[1] >= 'A') && (p[1] <= 'F')) c |= (p[1] - 'A' + 10) << 4;
376 else goto fail;
377 if((p[2] >= '0') && (p[2] <= '9')) c |= (p[2] - '0');
378 else if((p[2] >= 'a') && (p[2] <= 'f')) c |= (p[2] - 'a' + 10);
379 else if((p[2] >= 'A') && (p[2] <= 'F')) c |= (p[2] - 'A' + 10);
380 else goto fail;
381 bufadd(buf, c);
382 p += 3;
383 } else {
384 bufadd(buf, *(p++));
385 }
386 }
387 bufadd(buf, 0);
388 return(buf.b);
389fail:
390 buffree(buf);
391 return(NULL);
392}