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16 nishi 1 
/* $Id: http.c 240 2024-10-03 05:54:55Z 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 
 
219 nishi 18 
#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__BORLANDC__) || defined(__WATCOMC__)
240 nishi 19 
#ifdef USE_WINSOCK1
20 
#include <winsock.h>
21 
#else
17 nishi 22 
#include <winsock2.h>
240 nishi 23 
#endif
17 nishi 24 
#else
118 nishi 25 
#ifdef USE_POLL
187 nishi 26 
#ifdef __PPU__
27 
#include <net/poll.h>
28 
#else
118 nishi 29 
#include <poll.h>
187 nishi 30 
#endif
118 nishi 31 
#else
17 nishi 32 
#include <sys/select.h>
33 
#endif
118 nishi 34 
#endif
17 nishi 35 
 
16 nishi 36 
void tw_free_request(struct tw_http_request* req) {
37 
	if(req->method != NULL) free(req->method);
38 
	if(req->path != NULL) free(req->path);
20 nishi 39 
	if(req->query != NULL) free(req->query);
16 nishi 40 
	if(req->headers != NULL) {
41 
		int i;
42 
		for(i = 0; req->headers[i] != NULL; i++) free(req->headers[i]);
43 
		free(req->headers);
44 
	}
45 
	if(req->body != NULL) free(req->body);
46 
	if(req->version != NULL) free(req->version);
64 nishi 47 
 
48 
	req->method = NULL;
49 
	req->path = NULL;
50 
	req->query = NULL;
51 
	req->headers = NULL;
52 
	req->body = NULL;
53 
	req->version = NULL;
16 nishi 54 
}
55 
 
56 
int tw_http_parse(SSL* ssl, int sock, struct tw_http_request* req) {
57 
	char buffer[512];
58 
	char cbuf[2];
59 
	int phase = 0;
212 nishi 60 
	char* header;
61 
	int nl;
118 nishi 62 
 
63 
#ifdef USE_POLL
64 
	struct pollfd pollfds[1];
65 
	pollfds[0].fd = sock;
66 
	pollfds[0].events = POLLIN | POLLPRI;
67 
#else
16 nishi 68 
	fd_set fds;
118 nishi 69 
#endif
16 nishi 70 
 
71 
	bool bad = false;
72 
 
73 
	cbuf[1] = 0;
74 
 
75 
	req->method = NULL;
76 
	req->path = NULL;
20 nishi 77 
	req->query = NULL;
16 nishi 78 
	req->headers = NULL;
79 
	req->body = NULL;
80 
	req->version = NULL;
81 
 
212 nishi 82 
	header = malloc(1);
16 nishi 83 
	header[0] = 0;
212 nishi 84 
	nl = 0;
16 nishi 85 
 
86 
	while(1) {
212 nishi 87 
		int i;
88 
		int len;
213 nishi 89 
		int n;
118 nishi 90 
#ifndef USE_POLL
212 nishi 91 
		struct timeval tv;
16 nishi 92 
		FD_ZERO(&fds);
93 
		FD_SET(sock, &fds);
94 
		tv.tv_sec = 5;
95 
		tv.tv_usec = 0;
118 nishi 96 
#endif
43 nishi 97 
#ifndef NO_SSL
23 nishi 98 
		if(ssl == NULL || !SSL_has_pending(ssl)) {
43 nishi 99 
#endif
118 nishi 100 
#ifdef USE_POLL
212 nishi 101 
			n = poll(pollfds, 1, 5000);
118 nishi 102 
#else
88 nishi 103 
#ifdef __HAIKU__
212 nishi 104 
		n = select(32, &fds, NULL, NULL, &tv);
88 nishi 105 
#else
212 nishi 106 
		n = select(FD_SETSIZE, &fds, NULL, NULL, &tv);
88 nishi 107 
#endif
118 nishi 108 
#endif
22 nishi 109 
			if(n <= 0) {
147 nishi 110 
				cm_log("HTTP", "Timeout, disconnecting");
22 nishi 111 
				free(header);
112 
				tw_free_request(req);
113 
				return -1;
114 
			}
43 nishi 115 
#ifndef NO_SSL
22 nishi 116 
		}
43 nishi 117 
#endif
212 nishi 118 
		len = tw_read(ssl, sock, buffer, 512);
70 nishi 119 
		if(len <= 0) {
64 nishi 120 
			bad = true;
121 
			break;
122 
		}
16 nishi 123 
		for(i = 0; i < len; i++) {
124 
			char c = buffer[i];
125 
			if(phase == 0) {
126 
				if(c == ' ') {
127 
					if(req->method == NULL) {
128 
						tw_free_request(req);
129 
						bad = true;
130 
						goto getout;
131 
					} else {
132 
						phase++;
133 
					}
134 
				} else {
212 nishi 135 
					char* tmp;
16 nishi 136 
					if(req->method == NULL) {
137 
						req->method = malloc(1);
138 
						req->method[0] = 0;
139 
					}
140 
					cbuf[0] = c;
212 nishi 141 
					tmp = req->method;
16 nishi 142 
					req->method = cm_strcat(tmp, cbuf);
143 
					free(tmp);
144 
				}
145 
			} else if(phase == 1) {
146 
				if(c == ' ') {
147 
					if(req->path == NULL) {
148 
						tw_free_request(req);
149 
						bad = true;
150 
						goto getout;
151 
					} else {
152 
						phase++;
153 
					}
154 
				} else {
212 nishi 155 
					char* tmp;
16 nishi 156 
					if(req->path == NULL) {
157 
						req->path = malloc(1);
158 
						req->path[0] = 0;
159 
					}
160 
					cbuf[0] = c;
212 nishi 161 
					tmp = req->path;
16 nishi 162 
					req->path = cm_strcat(tmp, cbuf);
163 
					free(tmp);
164 
				}
165 
			} else if(phase == 2) {
166 
				if(c == '\n') {
167 
					if(req->version == NULL) {
168 
						tw_free_request(req);
169 
						bad = true;
170 
						goto getout;
171 
					} else {
172 
						/* We have Method, Path, Version now */
212 nishi 173 
						int j;
174 
						char* p;
175 
						int incr;
16 nishi 176 
						if(strcmp(req->version, "HTTP/1.1") != 0 && strcmp(req->version, "HTTP/1.0") != 0) {
177 
							cm_log("HTTP", "Bad HTTP Version");
178 
							bad = true;
179 
							goto getout;
180 
						}
181 
 
212 nishi 182 
						p = malloc(1);
16 nishi 183 
						p[0] = 0;
184 
						for(j = 0; req->path[j] != 0; j++) {
212 nishi 185 
							char* tmp;
16 nishi 186 
							if(req->path[j] == '/') {
187 
								cbuf[0] = '/';
188 
								for(; req->path[j] != 0 && req->path[j] == '/'; j++)
189 
									;
190 
								j--;
191 
							} else {
192 
								cbuf[0] = req->path[j];
193 
							}
212 nishi 194 
							tmp = p;
16 nishi 195 
							p = cm_strcat(tmp, cbuf);
196 
							free(tmp);
197 
						}
198 
						free(req->path);
199 
						req->path = p;
200 
 
212 nishi 201 
						incr = 0;
16 nishi 202 
						p = malloc(1);
203 
						p[0] = 0;
204 
						for(j = 0;; j++) {
205 
							if(req->path[j] == '/' || req->path[j] == 0) {
206 
								char oldc = req->path[j];
212 nishi 207 
								char* pth;
16 nishi 208 
								cbuf[0] = oldc;
209 
								req->path[j] = 0;
210 
 
212 nishi 211 
								pth = req->path + incr;
16 nishi 212 
 
213 
								if(strcmp(pth, "..") == 0) {
214 
									int k;
215 
									if(p[strlen(p) - 1] == '/') p[strlen(p) - 1] = 0;
216 
									for(k = strlen(p) - 1; k >= 0; k--) {
217 
										if(p[k] == '/') {
218 
											p[k + 1] = 0;
219 
											break;
220 
										}
221 
									}
222 
									if(strlen(p) == 0) {
223 
										free(p);
224 
										p = cm_strdup("/");
225 
									}
226 
								} else if(strcmp(pth, ".") == 0) {
227 
								} else {
228 
									char* tmp = p;
229 
									p = cm_strcat3(tmp, pth, cbuf);
230 
									free(tmp);
231 
								}
232 
 
233 
								incr = j + 1;
234 
								if(oldc == 0) break;
235 
							}
236 
						}
237 
						free(req->path);
238 
						req->path = p;
239 
 
240 
						cm_log("HTTP", "Request: %s %s %s", req->method, req->path, req->version);
241 
 
242 
						phase++;
243 
					}
244 
				} else if(c != '\r') {
212 nishi 245 
					char* tmp;
16 nishi 246 
					if(req->version == NULL) {
247 
						req->version = malloc(1);
248 
						req->version[0] = 0;
249 
					}
250 
					cbuf[0] = c;
212 nishi 251 
					tmp = req->version;
16 nishi 252 
					req->version = cm_strcat(tmp, cbuf);
253 
					free(tmp);
254 
				}
255 
			} else if(phase == 3) {
256 
				if(c == '\n') {
257 
					nl++;
258 
					if(nl == 2) {
259 
						phase++;
260 
						goto getout;
261 
					} else {
212 nishi 262 
						int j;
16 nishi 263 
						if(req->headers == NULL) {
264 
							req->headers = malloc(sizeof(*req->headers));
265 
							req->headers[0] = NULL;
266 
						}
267 
						for(j = 0; header[j] != 0; j++) {
268 
							if(header[j] == ':') {
212 nishi 269 
								char* kv;
270 
								char* vv;
271 
								char** old;
272 
								int k;
16 nishi 273 
								header[j] = 0;
274 
								j++;
275 
								for(; header[j] != 0 && (header[j] == ' ' || header[j] == '\t'); j++)
276 
									;
212 nishi 277 
								kv = header;
278 
								vv = header + j;
16 nishi 279 
 
212 nishi 280 
								old = req->headers;
16 nishi 281 
								for(k = 0; old[k] != NULL; k++)
282 
									;
283 
								req->headers = malloc(sizeof(*req->headers) * (k + 3));
284 
								for(k = 0; old[k] != NULL; k++) req->headers[k] = old[k];
285 
								req->headers[k] = cm_strdup(kv);
286 
								req->headers[k + 1] = cm_strdup(vv);
287 
								req->headers[k + 2] = NULL;
288 
								free(old);
289 
 
290 
								cm_log("HTTP", "Header: %s: %s", kv, vv);
291 
 
292 
								break;
293 
							}
294 
						}
295 
						free(header);
296 
						header = malloc(1);
297 
						header[0] = 0;
298 
					}
299 
				} else if(c != '\r') {
212 nishi 300 
					char* tmp;
16 nishi 301 
					nl = 0;
302 
					cbuf[0] = c;
212 nishi 303 
					tmp = header;
16 nishi 304 
					header = cm_strcat(tmp, cbuf);
305 
					free(tmp);
306 
				}
307 
			}
308 
		}
309 
	}
310 
getout:
311 
	free(header);
312 
	if(bad) {
313 
		tw_free_request(req);
314 
		return 1;
315 
	}
212 nishi 316 
	{
317 
		char* result = malloc(1);
318 
		int i;
319 
		int j;
320 
		int incr;
321 
		char* p;
322 
		result[0] = 0;
323 
		for(i = 0; req->path[i] != 0; i++) {
324 
			if(req->path[i] == '?') {
325 
				req->path[i] = 0;
326 
				req->query = cm_strdup(req->path + i + 1);
327 
				break;
328 
			}
20 nishi 329 
		}
212 nishi 330 
		for(i = 0; req->path[i] != 0; i++) {
331 
			if(req->path[i] == '%') {
332 
				if(req->path[i + 1] == 0) continue;
333 
				cbuf[0] = cm_hex(req->path + i + 1, 2);
334 
				if(cbuf[0] != '\\') {
335 
					char* tmp = result;
336 
					result = cm_strcat(tmp, cbuf);
337 
					free(tmp);
338 
				}
339 
				i += 2;
340 
			} else if(req->path[i] != '\\') {
341 
				char* tmp;
342 
				cbuf[0] = req->path[i];
343 
				tmp = result;
70 nishi 344 
				result = cm_strcat(tmp, cbuf);
345 
				free(tmp);
346 
			}
20 nishi 347 
		}
212 nishi 348 
		free(req->path);
349 
		req->path = result;
213 nishi 350 
 
212 nishi 351 
		incr = 0;
352 
		p = malloc(1);
353 
		p[0] = 0;
354 
		for(j = 0;; j++) {
355 
			if(req->path[j] == '/' || req->path[j] == 0) {
356 
				char oldc = req->path[j];
357 
				char* pth;
358 
				cbuf[0] = oldc;
359 
				req->path[j] = 0;
213 nishi 360 
 
212 nishi 361 
				pth = req->path + incr;
213 nishi 362 
 
212 nishi 363 
				if(strcmp(pth, "..") == 0) {
364 
					int k;
365 
					if(p[strlen(p) - 1] == '/') p[strlen(p) - 1] = 0;
366 
					for(k = strlen(p) - 1; k >= 0; k--) {
367 
						if(p[k] == '/') {
368 
							p[k + 1] = 0;
369 
							break;
370 
						}
69 nishi 371 
					}
212 nishi 372 
					if(strlen(p) == 0) {
373 
						free(p);
374 
						p = cm_strdup("/");
375 
					}
376 
				} else if(strcmp(pth, ".") == 0) {
377 
				} else {
378 
					char* tmp = p;
379 
					p = cm_strcat3(tmp, pth, cbuf);
380 
					free(tmp);
69 nishi 381 
				}
213 nishi 382 
 
212 nishi 383 
				incr = j + 1;
384 
				if(oldc == 0) break;
69 nishi 385 
			}
386 
		}
212 nishi 387 
		free(req->path);
388 
		req->path = p;
389 
		return 0;
69 nishi 390 
	}
16 nishi 391 
}