Commit | Line | Data |
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d0b0d52b | 1 | #include <malloc.h> |
0e6fd2e9 | 2 | #include <stdlib.h> |
d0b0d52b | 3 | #include <string.h> |
8a1d9e4a | 4 | #include <time.h> |
d0b0d52b ML |
5 | |
6 | #include "debug.h" | |
4baf6839 | 7 | #include "file.h" |
d0b0d52b ML |
8 | |
9 | #include "http.h" | |
10 | ||
8a1d9e4a LM |
11 | #define BUFFER_SIZE 128 |
12 | ||
bb0468a5 LM |
13 | #define HTTP_VERSION "HTTP/1.0" |
14 | #define SERVER_NAME "Webserver/0.0.1" | |
15 | ||
8a1d9e4a | 16 | char *codes[15] = { |
bb0468a5 LM |
17 | "200 OK", |
18 | "201 Created", | |
19 | "202 Accepted", | |
20 | "204 No Content", | |
21 | "301 Moved Permanently", | |
22 | "302 Moved Temporarily", | |
23 | "304 Not Modified", | |
24 | "400 Bad Request", | |
25 | "401 Unauthorized", | |
26 | "403 Forbidden", | |
27 | "404 Not Found", | |
28 | "500 Internal Server Error", | |
29 | "501 Not Implemented", | |
30 | "502 Bad Gateway", | |
31 | "503 Service Unavailable"}; | |
32 | ||
33 | typedef enum { | |
34 | c200 = 0, c201, c202, c204, | |
35 | c301, c302, c304, c400, | |
36 | c401, c403, c404, c500, | |
37 | c501, c502, c503 | |
38 | } code_t; | |
39 | ||
40 | typedef enum { | |
41 | not_supported_e = 0, get_e, head_e, post_e | |
42 | } method_t; | |
43 | ||
7fc5f3c6 LM |
44 | typedef enum { |
45 | encoding_plain_e = 0, encoding_gzip_e, encoding_compress_e | |
46 | } encoding_t; | |
47 | ||
bb0468a5 LM |
48 | typedef struct { |
49 | char *allow; | |
50 | char *authorization; | |
7fc5f3c6 | 51 | encoding_t content_encoding; |
bb0468a5 LM |
52 | char *content_length; |
53 | char *content_type; | |
54 | char *date; | |
55 | char *expires; | |
56 | char *from; | |
57 | char *if_modified_since; | |
58 | char *last_modified; | |
59 | char *location; | |
60 | char *pragma; | |
61 | char *referer; | |
62 | char *server; | |
63 | char *user_agent; | |
64 | char *www_authenticate; | |
65 | } header_t; | |
66 | ||
2bec4aa7 LM |
67 | typedef struct { |
68 | char *ext; | |
69 | char *type; | |
70 | char *charset; | |
71 | } mime_t; | |
72 | ||
73 | #define NB_MIMES 8 | |
74 | ||
75 | mime_t mimes[NB_MIMES] = { | |
76 | {"js", "application/javascript", "iso-8859-1"}, | |
77 | {"css", "text/css", "iso-8859-1"}, | |
78 | {"htm", "text/html", "iso-8859-1"}, | |
79 | {"html", "text/html", "iso-8859-1"}, | |
80 | {"png", "image/png", NULL}, | |
81 | {"jpeg", "image/jpeg", NULL}, | |
82 | {"jpg", "image/jpeg", NULL}, | |
83 | {"txt", "text/plain", "iso-8859-1"} | |
84 | }; | |
85 | ||
86 | /* find mime type */ | |
87 | ||
88 | mime_t *find_mime_type (char *filename) | |
89 | { | |
90 | /* find extention */ | |
91 | char *ext = filename + strlen (filename); | |
92 | while (--ext > filename) { | |
93 | if (ext[-1] == '.') { | |
94 | break; | |
95 | } | |
96 | } | |
97 | if (ext == filename) { | |
98 | return NULL; | |
99 | } | |
100 | ||
101 | /* find mime */ | |
102 | int i; | |
103 | for (i = 0; i < NB_MIMES; i++) { | |
104 | if (strcmp (ext, (mimes + i)->ext) == 0) { | |
105 | return mimes + i; | |
106 | } | |
107 | } | |
108 | ||
109 | return NULL; | |
110 | } | |
111 | ||
bb0468a5 LM |
112 | /* print header values */ |
113 | ||
114 | void print_header_values (header_t *header) | |
115 | { | |
cae06547 LM |
116 | printf ("Header values\n"); |
117 | if (header->allow) printf ("allow = '%s'\n", header->allow); | |
118 | if (header->authorization) printf ("authorization = '%s'\n", header->authorization); | |
7fc5f3c6 LM |
119 | if (header->content_encoding) { |
120 | printf ("content_encoding = "); | |
121 | switch (header->content_encoding) { | |
122 | case encoding_plain_e: printf ("plain\n"); break; | |
123 | case encoding_gzip_e: printf ("gzip\n"); break; | |
124 | case encoding_compress_e: printf ("compress\n"); break; | |
125 | } | |
126 | } | |
cae06547 LM |
127 | if (header->content_length) printf ("content_length = '%s'\n", header->content_length); |
128 | if (header->content_type) printf ("content_type = '%s'\n", header->content_type); | |
129 | if (header->date) printf ("date = '%s'\n", header->date); | |
130 | if (header->expires) printf ("expires = '%s'\n", header->expires); | |
131 | if (header->from) printf ("from = '%s'\n", header->from); | |
132 | if (header->if_modified_since) printf ("if_modified_since = '%s'\n", header->if_modified_since); | |
133 | if (header->last_modified) printf ("last_modified = '%s'\n", header->last_modified); | |
134 | if (header->location) printf ("location = '%s'\n", header->location); | |
135 | if (header->pragma) printf ("pragma = '%s'\n", header->pragma); | |
136 | if (header->referer) printf ("referer = '%s'\n", header->referer); | |
137 | if (header->server) printf ("server = '%s'\n", header->server); | |
138 | if (header->user_agent) printf ("user_agent = '%s'\n", header->user_agent); | |
139 | if (header->www_authenticate) printf ("www_authenticate = '%s'\n", header->www_authenticate); | |
bb0468a5 LM |
140 | } |
141 | ||
142 | /* find sequence*/ | |
143 | ||
144 | char *find_sequence (char *data, int len, char *seq, char **pdata) | |
145 | { | |
146 | ||
147 | int size = strlen (seq); | |
148 | ||
149 | int i; | |
150 | for (i = 0; i < len - size + 1; i++) { | |
151 | if (strncmp (data + i, seq, size) == 0) { | |
152 | data[i] = 0; | |
153 | if (pdata != NULL) { | |
154 | *pdata = data + i + size; | |
155 | } | |
156 | return data; | |
157 | } | |
158 | } | |
159 | ||
160 | return NULL; | |
161 | } | |
162 | ||
163 | /* response entity */ | |
164 | ||
8a1d9e4a | 165 | int add_line (char **buffer, char *str) |
bb0468a5 | 166 | { |
2bec4aa7 LM |
167 | VERBOSE (DEBUG, PRINT ("add line: %s\n", str)); |
168 | int len = ((*buffer) ? strlen (*buffer) : 0) + strlen (str) + 3; | |
50c7ef81 LM |
169 | VERBOSE (DEBUG, PRINT ("len: %d\n", len)); |
170 | if (*buffer) { | |
171 | *buffer = (char *)realloc (*buffer, len); | |
172 | } else { | |
173 | *buffer = (char *)calloc (len, 1); | |
174 | } | |
8a1d9e4a | 175 | strcat (*buffer, str); |
2bec4aa7 | 176 | strcat (*buffer, "\r\n"); |
d0b0d52b ML |
177 | return len; |
178 | } | |
179 | ||
8a1d9e4a | 180 | int add_status_line (char **buffer, code_t code) |
bb0468a5 | 181 | { |
8a1d9e4a LM |
182 | char tmp[BUFFER_SIZE] = {0}; |
183 | ||
184 | /* Status */ | |
2bec4aa7 | 185 | sprintf (tmp, "%s %s", HTTP_VERSION, codes[code]); |
8a1d9e4a LM |
186 | add_line (buffer, tmp); |
187 | ||
188 | return strlen (*buffer); | |
bb0468a5 LM |
189 | } |
190 | ||
8a1d9e4a | 191 | int add_general_header (char **buffer) |
bb0468a5 | 192 | { |
8a1d9e4a LM |
193 | char tmp[BUFFER_SIZE] = {0}; |
194 | ||
195 | /* Date */ | |
196 | time_t ts = time (NULL); | |
2bec4aa7 LM |
197 | sprintf (tmp, "Date: %s", ctime (&ts)); |
198 | tmp[strlen (tmp) - 1] = 0; // remove last \n | |
8a1d9e4a LM |
199 | add_line (buffer, tmp); |
200 | ||
201 | /* Pragma */ | |
202 | ||
203 | return strlen (*buffer); | |
204 | } | |
205 | ||
206 | int add_response_header (char **buffer, char *uri) | |
207 | { | |
208 | char tmp[BUFFER_SIZE] = {0}; | |
209 | ||
210 | /* Location */ | |
2bec4aa7 | 211 | sprintf (tmp, "Location: %s", uri); |
8a1d9e4a LM |
212 | add_line (buffer, tmp); |
213 | ||
214 | /* Server */ | |
2bec4aa7 | 215 | sprintf (tmp, "Server: %s", SERVER_NAME); |
8a1d9e4a LM |
216 | add_line (buffer, tmp); |
217 | ||
218 | /* WWW-Authentificate */ | |
219 | ||
220 | return strlen (*buffer); | |
bb0468a5 LM |
221 | } |
222 | ||
cae06547 | 223 | int add_entity (char **buffer, char *entity, int size, char *type, char *encoding) |
bb0468a5 | 224 | { |
8a1d9e4a LM |
225 | char tmp[BUFFER_SIZE] = {0}; |
226 | int len = strlen (*buffer); | |
227 | ||
228 | /* Allow */ | |
229 | /* Expires */ | |
230 | /* Last-Modified */ | |
231 | ||
232 | if (entity != NULL) { | |
233 | ||
234 | /* Content-Encoding */ | |
235 | if (encoding != NULL) { | |
0e6fd2e9 | 236 | sprintf (tmp, "Content-Encoding: %s", encoding); |
8a1d9e4a LM |
237 | add_line (buffer, tmp); |
238 | } | |
239 | ||
240 | /* Content-Length */ | |
2bec4aa7 | 241 | sprintf (tmp, "Content-Length: %d", size); |
8a1d9e4a LM |
242 | add_line (buffer, tmp); |
243 | ||
244 | /* Content-Type */ | |
2bec4aa7 | 245 | sprintf (tmp, "Content-Type: %s", type); |
8a1d9e4a LM |
246 | add_line (buffer, tmp); |
247 | ||
2bec4aa7 | 248 | add_line (buffer, ""); |
8a1d9e4a LM |
249 | |
250 | /* Entity */ | |
251 | len = strlen (*buffer); | |
252 | *buffer = realloc (*buffer, len + size); | |
253 | memcpy (*buffer + len, entity, size); | |
254 | len += size; | |
255 | } | |
256 | ||
bb0468a5 LM |
257 | return len; |
258 | } | |
259 | ||
260 | /* error 400 */ | |
261 | ||
262 | int error_400 (char **buffer) | |
263 | { | |
8a1d9e4a LM |
264 | add_status_line (buffer, c400); |
265 | add_general_header (buffer); | |
266 | add_response_header (buffer, NULL); | |
267 | ||
268 | char *response = "<html><head><title>Error 400</title></head><body><p>Bad Request</p></body></html>"; | |
cae06547 | 269 | return add_entity (buffer, response, strlen (response), "text/html", "iso-8859-1"); |
8a1d9e4a LM |
270 | } |
271 | ||
4baf6839 LM |
272 | /* error 404 */ |
273 | ||
274 | int error_404 (char **buffer, char *uri) | |
275 | { | |
276 | add_status_line (buffer, c404); | |
277 | add_general_header (buffer); | |
278 | add_response_header (buffer, uri); | |
279 | ||
280 | char *response = "<html><head><title>Error 404</title></head><body><p>File not found</p></body></html>"; | |
cae06547 | 281 | return add_entity (buffer, response, strlen (response), "text/html", "iso-8859-1"); |
4baf6839 LM |
282 | } |
283 | ||
2bec4aa7 | 284 | /* generic response */ |
8a1d9e4a | 285 | |
2bec4aa7 | 286 | int generic_response (char **buffer, char *location, char *response, int size) |
8a1d9e4a | 287 | { |
50c7ef81 LM |
288 | int len = 0; |
289 | VERBOSE (DEBUG, PRINT ("add_status_line %d\n", len)); | |
290 | len = add_status_line (buffer, c200); | |
291 | VERBOSE (DEBUG, PRINT ("add_general_header %d\n", len)); | |
292 | len = add_general_header (buffer); | |
293 | VERBOSE (DEBUG, PRINT ("add_response_header %d\n", len)); | |
294 | len = add_response_header (buffer, location); | |
2bec4aa7 | 295 | mime_t *mime = find_mime_type (location); |
50c7ef81 LM |
296 | |
297 | VERBOSE (DEBUG, PRINT ("add_entity %d\n", len)); | |
2bec4aa7 | 298 | return add_entity (buffer, response, size, mime->type, mime->charset); |
bb0468a5 LM |
299 | } |
300 | ||
301 | /* trim string */ | |
302 | ||
303 | char *trim (char *str) | |
304 | { | |
305 | if (str != NULL) { | |
306 | while ((*str == ' ') || (*str == '\t')) { | |
307 | str++; | |
308 | } | |
309 | } | |
310 | return str; | |
311 | } | |
312 | ||
313 | /* main HTTP processing */ | |
314 | ||
2bec4aa7 | 315 | int processing (char *data, int len, conf_t *conf, char **pdata) |
bb0468a5 | 316 | { |
0e6fd2e9 | 317 | char *saved_data = data; |
2bec4aa7 | 318 | char location[BUFFER_SIZE] = {0}; |
bb0468a5 LM |
319 | VERBOSE (DEBUG, PRINT ("Start processing\n")); |
320 | ||
321 | /* check method */ | |
0e6fd2e9 | 322 | char *line = find_sequence (data, len + data - saved_data, "\r\n", &data); |
bb0468a5 LM |
323 | if (line == NULL) { |
324 | VERBOSE (WARNING, PRINT ("Unknown received data\n")); | |
325 | if (pdata != NULL) { | |
326 | *pdata = NULL; | |
327 | } | |
328 | return 0; | |
329 | } | |
330 | VERBOSE (DEBUG, PRINT ("Command line: '%s'\n", line)); | |
331 | ||
332 | char *method = strtok (line, " "); | |
333 | char *uri = strtok (NULL, " "); | |
334 | char *version = strtok (NULL, " "); | |
335 | method_t type = not_supported_e; | |
336 | if (strcmp (method, "GET") == 0) { | |
337 | type = get_e; | |
338 | } else if (strcmp ("HEAD", method) == 0) { | |
339 | type = head_e; | |
340 | } else if (strcmp ("POST", method) == 0) { | |
341 | type = post_e; | |
342 | } else { | |
343 | VERBOSE (WARNING, PRINT ("Unkown method: %s\n", method)); | |
bb0468a5 LM |
344 | return error_400 (pdata); |
345 | } | |
346 | VERBOSE (INFO, PRINT ("%s %s (%s)\n", (type == get_e) ? "Get" : (type == head_e) ? "Head" : "Post", uri, version)); | |
347 | ||
4baf6839 | 348 | /* analyse uri */ |
0e6fd2e9 LM |
349 | char *filename = strtok (uri, "&"); |
350 | char *variables = strtok (NULL, "\n"); | |
351 | char *path = (char *) calloc (strlen (conf->root) + strlen (filename) + 2, 1); | |
2bec4aa7 | 352 | //sprintf (filename, "%s%s%s", conf->root, ((conf->root[strlen (conf->root) - 1] != '/') && (uri[0] != '/')) ? "/" : "", uri); |
0e6fd2e9 | 353 | sprintf (path, "%s/%s", conf->root, filename); |
4baf6839 | 354 | |
bb0468a5 LM |
355 | /* check header */ |
356 | header_t header = {0}; | |
0e6fd2e9 | 357 | while (strcmp (line = find_sequence (data, len + data - saved_data, "\r\n", &data), "") != 0) { |
bb0468a5 LM |
358 | VERBOSE (DEBUG, PRINT ("Header line: '%s'\n", line)); |
359 | char *field = strtok (line, ":"); | |
360 | char *value = trim (strtok (NULL, "\r")); | |
361 | VERBOSE (DEBUG, PRINT ("Field: %s\nValue: %s\n", field, value)); | |
362 | if (*line == 0) { | |
363 | break; | |
364 | } | |
365 | ||
366 | VERBOSE (DEBUG, PRINT ("Analyse field\n")); | |
62584064 LM |
367 | if (strcmp (field, "Allow") == 0) { header.allow = value; } |
368 | else if (strcmp (field, "Authorization") == 0) { header.authorization = value; } | |
7fc5f3c6 LM |
369 | else if (strcmp (field, "Content-Encoding") == 0) { |
370 | if (strcmp (value, "x-gzip") == 0) { | |
371 | header.content_encoding = encoding_gzip_e; | |
372 | } else if (strcmp (value, "x-compress") == 0) { | |
373 | header.content_encoding = encoding_compress_e; | |
374 | } else { | |
375 | VERBOSE (WARNING, PRINT ("Unknown content encoding: %s\n", value)); | |
376 | } | |
377 | } else if (strcmp (field, "Content-Length") == 0) { header.content_length = value; } | |
62584064 LM |
378 | else if (strcmp (field, "Content-Type") == 0) { header.content_type = value; } |
379 | else if (strcmp (field, "Date") == 0) { header.date = value; } | |
380 | else if (strcmp (field, "Expires") == 0) { header.expires = value; } | |
381 | else if (strcmp (field, "From") == 0) { header.from = value; } | |
382 | else if (strcmp (field, "If-Modified-Since") == 0) { header.if_modified_since = value; } | |
383 | else if (strcmp (field, "Last-Modified") == 0) { header.last_modified = value; } | |
384 | else if (strcmp (field, "Location") == 0) { header.location = value; } | |
385 | else if (strcmp (field, "Pragma") == 0) { header.pragma = value; } | |
386 | else if (strcmp (field, "Referer") == 0) { header.referer = value; } | |
387 | else if (strcmp (field, "Server") == 0) { header.server = value; } | |
388 | else if (strcmp (field, "User-Agent") == 0) { header.user_agent = value; } | |
389 | else if (strcmp (field, "WWW-Authenticate") == 0) { header.www_authenticate = value; } | |
390 | else { VERBOSE (WARNING, PRINT ("Unknown header field: '%s'\n", field)); } | |
bb0468a5 LM |
391 | } |
392 | VERBOSE (DEBUG, print_header_values (&header)); | |
393 | ||
0e6fd2e9 LM |
394 | /* body */ |
395 | char *body = data; | |
396 | len -= saved_data - data; | |
397 | if (len != (header.content_length ? atoi (header.content_length) : 0)) { | |
398 | VERBOSE (WARNING, PRINT ("Incoherent size (%d <> %s)\n", len, header.content_length)); | |
399 | } | |
7fc5f3c6 LM |
400 | if (len > 0) { |
401 | switch (header.content_encoding) { | |
402 | case encoding_plain_e: break; | |
403 | case encoding_gzip_e: VERBOSE (WARNING, PRINT ("Gzip encoding not supported yet\n")); break; | |
404 | case encoding_compress_e: VERBOSE (WARNING, PRINT ("Compress encoding not supported yet\n")); break; | |
405 | } | |
406 | } | |
0e6fd2e9 | 407 | |
bb0468a5 | 408 | /* response */ |
4baf6839 | 409 | char *buffer = NULL; |
62584064 | 410 | FILE *fid = NULL; |
8a1d9e4a LM |
411 | switch (type) { |
412 | case get_e: | |
0e6fd2e9 LM |
413 | case post_e: /* fall through */ |
414 | VERBOSE (DEBUG, PRINT ("Read file %s\n", path)); | |
415 | len = readfile (&buffer, path); | |
d256f755 | 416 | if (len < 0) { |
2bec4aa7 LM |
417 | sprintf (location, "http://%s/", conf->servername); |
418 | len = error_404 (pdata, location); | |
4baf6839 | 419 | } else { |
0e6fd2e9 | 420 | sprintf (location, "http://%s%s", conf->servername, path); |
2bec4aa7 | 421 | len = generic_response (pdata, location, buffer, len); |
4baf6839 LM |
422 | free (buffer); |
423 | } | |
8a1d9e4a LM |
424 | break; |
425 | case head_e: | |
0e6fd2e9 LM |
426 | VERBOSE (DEBUG, PRINT ("Test file %s\n", path)); |
427 | fid = fopen (path, "rb"); | |
62584064 LM |
428 | if (fid == NULL) { |
429 | sprintf (location, "http://%s/", conf->servername); | |
430 | len = error_404 (pdata, location); | |
431 | } else { | |
432 | fclose (fid); | |
0e6fd2e9 | 433 | sprintf (location, "http://%s%s", conf->servername, path); |
62584064 LM |
434 | len = generic_response (pdata, location, NULL, 0); |
435 | } | |
8a1d9e4a | 436 | break; |
8a1d9e4a LM |
437 | case not_supported_e: |
438 | break; | |
439 | } | |
440 | ||
4baf6839 | 441 | /* cleaning */ |
6add28e9 | 442 | VERBOSE (DEBUG, PRINT ("Cleaning\n")); |
0e6fd2e9 LM |
443 | if (path) { |
444 | VERBOSE (DEBUG, PRINT ("Cleaning path\n")); | |
445 | free (path); | |
6add28e9 | 446 | } |
4baf6839 | 447 | |
8a1d9e4a | 448 | return len; |
bb0468a5 LM |
449 | } |
450 | ||
d0b0d52b | 451 | /* vim: set ts=4 sw=4 et: */ |