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16 nishi 1 
/* $Id: http.c 335 2024-10-14 18:06:21Z nishi $ */
2 
 
3 
#define SOURCE
4 
 
43 nishi 5 
#include "../config.h"
6 
 
16 nishi 7 
#include "tw_http.h"
8 
 
9 
#include "tw_server.h"
10 
 
11 
#include <cm_log.h>
12 
#include <cm_string.h>
13 
 
14 
#include <stdbool.h>
15 
#include <stdlib.h>
17 nishi 16 
#include <string.h>
16 nishi 17 
 
312 nishi 18 
#ifdef __OS2__
19 
#include <sys/time.h>
20 
#include <types.h>
21 
#include <tcpustd.h>
22 
#endif
23 
 
315 nishi 24 
#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__) || (defined(__WATCOMC__) && !defined(__OS2__) && !defined(__NETWARE__))
240 nishi 25 
#ifdef USE_WINSOCK1
26 
#include <winsock.h>
27 
#else
17 nishi 28 
#include <winsock2.h>
240 nishi 29 
#endif
315 nishi 30 
#elif defined(__NETWARE__)
31 
#include <sys/socket.h>
17 nishi 32 
#else
118 nishi 33 
#ifdef USE_POLL
187 nishi 34 
#ifdef __PPU__
35 
#include <net/poll.h>
36 
#else
118 nishi 37 
#include <poll.h>
187 nishi 38 
#endif
118 nishi 39 
#else
335 nishi 40 
#ifndef __NeXT__
17 nishi 41 
#include <sys/select.h>
42 
#endif
118 nishi 43 
#endif
335 nishi 44 
#endif
17 nishi 45 
 
16 nishi 46 
void tw_free_request(struct tw_http_request* req) {
47 
	if(req->method != NULL) free(req->method);
48 
	if(req->path != NULL) free(req->path);
20 nishi 49 
	if(req->query != NULL) free(req->query);
16 nishi 50 
	if(req->headers != NULL) {
51 
		int i;
52 
		for(i = 0; req->headers[i] != NULL; i++) free(req->headers[i]);
53 
		free(req->headers);
54 
	}
55 
	if(req->body != NULL) free(req->body);
56 
	if(req->version != NULL) free(req->version);
64 nishi 57 
 
58 
	req->method = NULL;
59 
	req->path = NULL;
60 
	req->query = NULL;
61 
	req->headers = NULL;
62 
	req->body = NULL;
63 
	req->version = NULL;
16 nishi 64 
}
65 
 
66 
int tw_http_parse(SSL* ssl, int sock, struct tw_http_request* req) {
67 
	char buffer[512];
68 
	char cbuf[2];
69 
	int phase = 0;
212 nishi 70 
	char* header;
71 
	int nl;
294 nishi 72 
	bool bad;
118 nishi 73 
 
74 
#ifdef USE_POLL
75 
	struct pollfd pollfds[1];
76 
	pollfds[0].fd = sock;
77 
	pollfds[0].events = POLLIN | POLLPRI;
78 
#else
16 nishi 79 
	fd_set fds;
118 nishi 80 
#endif
16 nishi 81 
 
294 nishi 82 
	bad = false;
16 nishi 83 
 
84 
	cbuf[1] = 0;
85 
 
86 
	req->method = NULL;
87 
	req->path = NULL;
20 nishi 88 
	req->query = NULL;
16 nishi 89 
	req->headers = NULL;
90 
	req->body = NULL;
91 
	req->version = NULL;
92 
 
212 nishi 93 
	header = malloc(1);
16 nishi 94 
	header[0] = 0;
212 nishi 95 
	nl = 0;
16 nishi 96 
 
97 
	while(1) {
212 nishi 98 
		int i;
99 
		int len;
213 nishi 100 
		int n;
118 nishi 101 
#ifndef USE_POLL
212 nishi 102 
		struct timeval tv;
16 nishi 103 
		FD_ZERO(&fds);
104 
		FD_SET(sock, &fds);
105 
		tv.tv_sec = 5;
106 
		tv.tv_usec = 0;
118 nishi 107 
#endif
43 nishi 108 
#ifndef NO_SSL
23 nishi 109 
		if(ssl == NULL || !SSL_has_pending(ssl)) {
43 nishi 110 
#endif
118 nishi 111 
#ifdef USE_POLL
212 nishi 112 
			n = poll(pollfds, 1, 5000);
118 nishi 113 
#else
88 nishi 114 
#ifdef __HAIKU__
212 nishi 115 
		n = select(32, &fds, NULL, NULL, &tv);
88 nishi 116 
#else
212 nishi 117 
		n = select(FD_SETSIZE, &fds, NULL, NULL, &tv);
88 nishi 118 
#endif
118 nishi 119 
#endif
22 nishi 120 
			if(n <= 0) {
147 nishi 121 
				cm_log("HTTP", "Timeout, disconnecting");
22 nishi 122 
				free(header);
123 
				tw_free_request(req);
124 
				return -1;
125 
			}
43 nishi 126 
#ifndef NO_SSL
22 nishi 127 
		}
43 nishi 128 
#endif
212 nishi 129 
		len = tw_read(ssl, sock, buffer, 512);
70 nishi 130 
		if(len <= 0) {
64 nishi 131 
			bad = true;
132 
			break;
133 
		}
16 nishi 134 
		for(i = 0; i < len; i++) {
135 
			char c = buffer[i];
136 
			if(phase == 0) {
137 
				if(c == ' ') {
138 
					if(req->method == NULL) {
139 
						tw_free_request(req);
140 
						bad = true;
141 
						goto getout;
142 
					} else {
143 
						phase++;
144 
					}
145 
				} else {
212 nishi 146 
					char* tmp;
16 nishi 147 
					if(req->method == NULL) {
148 
						req->method = malloc(1);
149 
						req->method[0] = 0;
150 
					}
151 
					cbuf[0] = c;
212 nishi 152 
					tmp = req->method;
16 nishi 153 
					req->method = cm_strcat(tmp, cbuf);
154 
					free(tmp);
155 
				}
156 
			} else if(phase == 1) {
157 
				if(c == ' ') {
158 
					if(req->path == NULL) {
159 
						tw_free_request(req);
160 
						bad = true;
161 
						goto getout;
162 
					} else {
163 
						phase++;
164 
					}
165 
				} else {
212 nishi 166 
					char* tmp;
16 nishi 167 
					if(req->path == NULL) {
168 
						req->path = malloc(1);
169 
						req->path[0] = 0;
170 
					}
171 
					cbuf[0] = c;
212 nishi 172 
					tmp = req->path;
16 nishi 173 
					req->path = cm_strcat(tmp, cbuf);
174 
					free(tmp);
175 
				}
176 
			} else if(phase == 2) {
177 
				if(c == '\n') {
178 
					if(req->version == NULL) {
179 
						tw_free_request(req);
180 
						bad = true;
181 
						goto getout;
182 
					} else {
183 
						/* We have Method, Path, Version now */
212 nishi 184 
						int j;
185 
						char* p;
186 
						int incr;
16 nishi 187 
						if(strcmp(req->version, "HTTP/1.1") != 0 && strcmp(req->version, "HTTP/1.0") != 0) {
188 
							cm_log("HTTP", "Bad HTTP Version");
189 
							bad = true;
190 
							goto getout;
191 
						}
192 
 
212 nishi 193 
						p = malloc(1);
16 nishi 194 
						p[0] = 0;
195 
						for(j = 0; req->path[j] != 0; j++) {
212 nishi 196 
							char* tmp;
16 nishi 197 
							if(req->path[j] == '/') {
198 
								cbuf[0] = '/';
199 
								for(; req->path[j] != 0 && req->path[j] == '/'; j++)
200 
									;
201 
								j--;
202 
							} else {
203 
								cbuf[0] = req->path[j];
204 
							}
212 nishi 205 
							tmp = p;
16 nishi 206 
							p = cm_strcat(tmp, cbuf);
207 
							free(tmp);
208 
						}
209 
						free(req->path);
210 
						req->path = p;
211 
 
212 nishi 212 
						incr = 0;
16 nishi 213 
						p = malloc(1);
214 
						p[0] = 0;
215 
						for(j = 0;; j++) {
216 
							if(req->path[j] == '/' || req->path[j] == 0) {
217 
								char oldc = req->path[j];
212 nishi 218 
								char* pth;
16 nishi 219 
								cbuf[0] = oldc;
220 
								req->path[j] = 0;
221 
 
212 nishi 222 
								pth = req->path + incr;
16 nishi 223 
 
224 
								if(strcmp(pth, "..") == 0) {
225 
									int k;
226 
									if(p[strlen(p) - 1] == '/') p[strlen(p) - 1] = 0;
227 
									for(k = strlen(p) - 1; k >= 0; k--) {
228 
										if(p[k] == '/') {
229 
											p[k + 1] = 0;
230 
											break;
231 
										}
232 
									}
233 
									if(strlen(p) == 0) {
234 
										free(p);
235 
										p = cm_strdup("/");
236 
									}
237 
								} else if(strcmp(pth, ".") == 0) {
238 
								} else {
239 
									char* tmp = p;
240 
									p = cm_strcat3(tmp, pth, cbuf);
241 
									free(tmp);
242 
								}
243 
 
244 
								incr = j + 1;
245 
								if(oldc == 0) break;
246 
							}
247 
						}
248 
						free(req->path);
249 
						req->path = p;
250 
 
251 
						cm_log("HTTP", "Request: %s %s %s", req->method, req->path, req->version);
252 
 
253 
						phase++;
254 
					}
255 
				} else if(c != '\r') {
212 nishi 256 
					char* tmp;
16 nishi 257 
					if(req->version == NULL) {
258 
						req->version = malloc(1);
259 
						req->version[0] = 0;
260 
					}
261 
					cbuf[0] = c;
212 nishi 262 
					tmp = req->version;
16 nishi 263 
					req->version = cm_strcat(tmp, cbuf);
264 
					free(tmp);
265 
				}
266 
			} else if(phase == 3) {
267 
				if(c == '\n') {
268 
					nl++;
269 
					if(nl == 2) {
270 
						phase++;
271 
						goto getout;
272 
					} else {
212 nishi 273 
						int j;
16 nishi 274 
						if(req->headers == NULL) {
275 
							req->headers = malloc(sizeof(*req->headers));
276 
							req->headers[0] = NULL;
277 
						}
278 
						for(j = 0; header[j] != 0; j++) {
279 
							if(header[j] == ':') {
212 nishi 280 
								char* kv;
281 
								char* vv;
282 
								char** old;
283 
								int k;
16 nishi 284 
								header[j] = 0;
285 
								j++;
286 
								for(; header[j] != 0 && (header[j] == ' ' || header[j] == '\t'); j++)
287 
									;
212 nishi 288 
								kv = header;
289 
								vv = header + j;
16 nishi 290 
 
212 nishi 291 
								old = req->headers;
16 nishi 292 
								for(k = 0; old[k] != NULL; k++)
293 
									;
294 
								req->headers = malloc(sizeof(*req->headers) * (k + 3));
295 
								for(k = 0; old[k] != NULL; k++) req->headers[k] = old[k];
296 
								req->headers[k] = cm_strdup(kv);
297 
								req->headers[k + 1] = cm_strdup(vv);
298 
								req->headers[k + 2] = NULL;
299 
								free(old);
300 
 
301 
								cm_log("HTTP", "Header: %s: %s", kv, vv);
302 
 
303 
								break;
304 
							}
305 
						}
306 
						free(header);
307 
						header = malloc(1);
308 
						header[0] = 0;
309 
					}
310 
				} else if(c != '\r') {
212 nishi 311 
					char* tmp;
16 nishi 312 
					nl = 0;
313 
					cbuf[0] = c;
212 nishi 314 
					tmp = header;
16 nishi 315 
					header = cm_strcat(tmp, cbuf);
316 
					free(tmp);
317 
				}
318 
			}
319 
		}
320 
	}
321 
getout:
322 
	free(header);
323 
	if(bad) {
324 
		tw_free_request(req);
325 
		return 1;
326 
	}
212 nishi 327 
	{
328 
		char* result = malloc(1);
329 
		int i;
330 
		int j;
331 
		int incr;
332 
		char* p;
333 
		result[0] = 0;
334 
		for(i = 0; req->path[i] != 0; i++) {
335 
			if(req->path[i] == '?') {
336 
				req->path[i] = 0;
337 
				req->query = cm_strdup(req->path + i + 1);
338 
				break;
339 
			}
20 nishi 340 
		}
212 nishi 341 
		for(i = 0; req->path[i] != 0; i++) {
342 
			if(req->path[i] == '%') {
343 
				if(req->path[i + 1] == 0) continue;
344 
				cbuf[0] = cm_hex(req->path + i + 1, 2);
345 
				if(cbuf[0] != '\\') {
346 
					char* tmp = result;
347 
					result = cm_strcat(tmp, cbuf);
348 
					free(tmp);
349 
				}
350 
				i += 2;
351 
			} else if(req->path[i] != '\\') {
352 
				char* tmp;
353 
				cbuf[0] = req->path[i];
354 
				tmp = result;
70 nishi 355 
				result = cm_strcat(tmp, cbuf);
356 
				free(tmp);
357 
			}
20 nishi 358 
		}
212 nishi 359 
		free(req->path);
360 
		req->path = result;
213 nishi 361 
 
212 nishi 362 
		incr = 0;
363 
		p = malloc(1);
364 
		p[0] = 0;
365 
		for(j = 0;; j++) {
366 
			if(req->path[j] == '/' || req->path[j] == 0) {
367 
				char oldc = req->path[j];
368 
				char* pth;
369 
				cbuf[0] = oldc;
370 
				req->path[j] = 0;
213 nishi 371 
 
212 nishi 372 
				pth = req->path + incr;
213 nishi 373 
 
212 nishi 374 
				if(strcmp(pth, "..") == 0) {
375 
					int k;
376 
					if(p[strlen(p) - 1] == '/') p[strlen(p) - 1] = 0;
377 
					for(k = strlen(p) - 1; k >= 0; k--) {
378 
						if(p[k] == '/') {
379 
							p[k + 1] = 0;
380 
							break;
381 
						}
69 nishi 382 
					}
212 nishi 383 
					if(strlen(p) == 0) {
384 
						free(p);
385 
						p = cm_strdup("/");
386 
					}
387 
				} else if(strcmp(pth, ".") == 0) {
388 
				} else {
389 
					char* tmp = p;
390 
					p = cm_strcat3(tmp, pth, cbuf);
391 
					free(tmp);
69 nishi 392 
				}
213 nishi 393 
 
212 nishi 394 
				incr = j + 1;
395 
				if(oldc == 0) break;
69 nishi 396 
			}
397 
		}
212 nishi 398 
		free(req->path);
399 
		req->path = p;
400 
		return 0;
69 nishi 401 
	}
16 nishi 402 
}