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