http.c@ 97

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Last change on this file since 97 was 88, checked in by Nishi, on Sep 19, 2024 at 9:59:40 PM
fix select
Property svn:keywords set to `Id`
File size: 7.0 KB

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1	/* $Id: http.c 88 2024-09-19 12:59:40Z nishi $ */
2
3	#define SOURCE
4
5	#include "../config.h"
6
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>
16	#include <string.h>
17
18	#ifdef __MINGW32__
19	#include <winsock2.h>
20	#else
21	#include <sys/select.h>
22	#endif
23
24	void tw_free_request(struct tw_http_request* req) {
25	if(req->method != NULL) free(req->method);
26	if(req->path != NULL) free(req->path);
27	if(req->query != NULL) free(req->query);
28	if(req->headers != NULL) {
29	int i;
30	for(i = 0; req->headers[i] != NULL; i++) free(req->headers[i]);
31	free(req->headers);
32	}
33	if(req->body != NULL) free(req->body);
34	if(req->version != NULL) free(req->version);
35
36	req->method = NULL;
37	req->path = NULL;
38	req->query = NULL;
39	req->headers = NULL;
40	req->body = NULL;
41	req->version = NULL;
42	}
43
44	int tw_http_parse(SSL* ssl, int sock, struct tw_http_request* req) {
45	char buffer[512];
46	char cbuf[2];
47	int phase = 0;
48	fd_set fds;
49
50	bool bad = false;
51
52	cbuf[1] = 0;
53
54	req->method = NULL;
55	req->path = NULL;
56	req->query = NULL;
57	req->headers = NULL;
58	req->body = NULL;
59	req->version = NULL;
60
61	char* header = malloc(1);
62	header[0] = 0;
63	int nl = 0;
64
65	while(1) {
66	FD_ZERO(&fds);
67	FD_SET(sock, &fds);
68	struct timeval tv;
69	tv.tv_sec = 5;
70	tv.tv_usec = 0;
71	#ifndef NO_SSL
72	if(ssl == NULL \|\| !SSL_has_pending(ssl)) {
73	#endif
74	#ifdef __HAIKU__
75	int n = select(32, &fds, NULL, NULL, &tv);
76	#else
77	int n = select(FD_SETSIZE, &fds, NULL, NULL, &tv);
78	#endif
79	if(n <= 0) {
80	cm_log("HTTP", "Timeout, disconncting");
81	free(header);
82	tw_free_request(req);
83	return -1;
84	}
85	#ifndef NO_SSL
86	}
87	#endif
88	int len = tw_read(ssl, sock, buffer, 512);
89	if(len <= 0) {
90	bad = true;
91	break;
92	}
93	int i;
94	for(i = 0; i < len; i++) {
95	char c = buffer[i];
96	if(phase == 0) {
97	if(c == ' ') {
98	if(req->method == NULL) {
99	tw_free_request(req);
100	bad = true;
101	goto getout;
102	} else {
103	phase++;
104	}
105	} else {
106	if(req->method == NULL) {
107	req->method = malloc(1);
108	req->method[0] = 0;
109	}
110	cbuf[0] = c;
111	char* tmp = req->method;
112	req->method = cm_strcat(tmp, cbuf);
113	free(tmp);
114	}
115	} else if(phase == 1) {
116	if(c == ' ') {
117	if(req->path == NULL) {
118	tw_free_request(req);
119	bad = true;
120	goto getout;
121	} else {
122	phase++;
123	}
124	} else {
125	if(req->path == NULL) {
126	req->path = malloc(1);
127	req->path[0] = 0;
128	}
129	cbuf[0] = c;
130	char* tmp = req->path;
131	req->path = cm_strcat(tmp, cbuf);
132	free(tmp);
133	}
134	} else if(phase == 2) {
135	if(c == '\n') {
136	if(req->version == NULL) {
137	tw_free_request(req);
138	bad = true;
139	goto getout;
140	} else {
141	/* We have Method, Path, Version now */
142
143	if(strcmp(req->version, "HTTP/1.1") != 0 && strcmp(req->version, "HTTP/1.0") != 0) {
144	cm_log("HTTP", "Bad HTTP Version");
145	bad = true;
146	goto getout;
147	}
148
149	int j;
150	char* p = malloc(1);
151	p[0] = 0;
152	for(j = 0; req->path[j] != 0; j++) {
153	if(req->path[j] == '/') {
154	cbuf[0] = '/';
155	for(; req->path[j] != 0 && req->path[j] == '/'; j++)
156	;
157	j--;
158	} else {
159	cbuf[0] = req->path[j];
160	}
161	char* tmp = p;
162	p = cm_strcat(tmp, cbuf);
163	free(tmp);
164	}
165	free(req->path);
166	req->path = p;
167
168	int incr = 0;
169	p = malloc(1);
170	p[0] = 0;
171	for(j = 0;; j++) {
172	if(req->path[j] == '/' \|\| req->path[j] == 0) {
173	char oldc = req->path[j];
174	cbuf[0] = oldc;
175	req->path[j] = 0;
176
177	char* pth = req->path + incr;
178
179	if(strcmp(pth, "..") == 0) {
180	int k;
181	if(p[strlen(p) - 1] == '/') p[strlen(p) - 1] = 0;
182	for(k = strlen(p) - 1; k >= 0; k--) {
183	if(p[k] == '/') {
184	p[k + 1] = 0;
185	break;
186	}
187	}
188	if(strlen(p) == 0) {
189	free(p);
190	p = cm_strdup("/");
191	}
192	} else if(strcmp(pth, ".") == 0) {
193	} else {
194	char* tmp = p;
195	p = cm_strcat3(tmp, pth, cbuf);
196	free(tmp);
197	}
198
199	incr = j + 1;
200	if(oldc == 0) break;
201	}
202	}
203	free(req->path);
204	req->path = p;
205
206	cm_log("HTTP", "Request: %s %s %s", req->method, req->path, req->version);
207
208	phase++;
209	}
210	} else if(c != '\r') {
211	if(req->version == NULL) {
212	req->version = malloc(1);
213	req->version[0] = 0;
214	}
215	cbuf[0] = c;
216	char* tmp = req->version;
217	req->version = cm_strcat(tmp, cbuf);
218	free(tmp);
219	}
220	} else if(phase == 3) {
221	if(c == '\n') {
222	nl++;
223	if(nl == 2) {
224	phase++;
225	goto getout;
226	} else {
227	if(req->headers == NULL) {
228	req->headers = malloc(sizeof(*req->headers));
229	req->headers[0] = NULL;
230	}
231	int j;
232	for(j = 0; header[j] != 0; j++) {
233	if(header[j] == ':') {
234	header[j] = 0;
235	j++;
236	for(; header[j] != 0 && (header[j] == ' ' \|\| header[j] == '\t'); j++)
237	;
238	char* kv = header;
239	char* vv = header + j;
240
241	char** old = req->headers;
242	int k;
243	for(k = 0; old[k] != NULL; k++)
244	;
245	req->headers = malloc(sizeof(req->headers) (k + 3));
246	for(k = 0; old[k] != NULL; k++) req->headers[k] = old[k];
247	req->headers[k] = cm_strdup(kv);
248	req->headers[k + 1] = cm_strdup(vv);
249	req->headers[k + 2] = NULL;
250	free(old);
251
252	cm_log("HTTP", "Header: %s: %s", kv, vv);
253
254	break;
255	}
256	}
257	free(header);
258	header = malloc(1);
259	header[0] = 0;
260	}
261	} else if(c != '\r') {
262	nl = 0;
263	cbuf[0] = c;
264	char* tmp = header;
265	header = cm_strcat(tmp, cbuf);
266	free(tmp);
267	}
268	}
269	}
270	}
271	getout:
272	free(header);
273	if(bad) {
274	tw_free_request(req);
275	return 1;
276	}
277	char* result = malloc(1);
278	result[0] = 0;
279	int i;
280	for(i = 0; req->path[i] != 0; i++) {
281	if(req->path[i] == '?') {
282	req->path[i] = 0;
283	req->query = cm_strdup(req->path + i + 1);
284	break;
285	}
286	}
287	for(i = 0; req->path[i] != 0; i++) {
288	if(req->path[i] == '%') {
289	if(req->path[i + 1] == 0) continue;
290	cbuf[0] = cm_hex(req->path + i + 1, 2);
291	if(cbuf[0] != '\\') {
292	char* tmp = result;
293	result = cm_strcat(tmp, cbuf);
294	free(tmp);
295	}
296	i += 2;
297	} else if(req->path[i] != '\\') {
298	cbuf[0] = req->path[i];
299	char* tmp = result;
300	result = cm_strcat(tmp, cbuf);
301	free(tmp);
302	}
303	}
304	free(req->path);
305	req->path = result;
306
307	int incr = 0;
308	char* p = malloc(1);
309	p[0] = 0;
310	int j;
311	for(j = 0;; j++) {
312	if(req->path[j] == '/' \|\| req->path[j] == 0) {
313	char oldc = req->path[j];
314	cbuf[0] = oldc;
315	req->path[j] = 0;
316
317	char* pth = req->path + incr;
318
319	if(strcmp(pth, "..") == 0) {
320	int k;
321	if(p[strlen(p) - 1] == '/') p[strlen(p) - 1] = 0;
322	for(k = strlen(p) - 1; k >= 0; k--) {
323	if(p[k] == '/') {
324	p[k + 1] = 0;
325	break;
326	}
327	}
328	if(strlen(p) == 0) {
329	free(p);
330	p = cm_strdup("/");
331	}
332	} else if(strcmp(pth, ".") == 0) {
333	} else {
334	char* tmp = p;
335	p = cm_strcat3(tmp, pth, cbuf);
336	free(tmp);
337	}
338
339	incr = j + 1;
340	if(oldc == 0) break;
341	}
342	}
343	free(req->path);
344	req->path = p;
345	return 0;
346	}

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source: Main/trunk/Server/http.c@ 97

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