1: #include "first.h"
2:
3: #include "base.h"
4: #include "log.h"
5: #include "buffer.h"
6: #include "http_chunk.h"
7:
8: #include "plugin.h"
9:
10: #include "mod_magnet_cache.h"
11: #include "response.h"
12: #include "stat_cache.h"
13: #include "status_counter.h"
14: #include "etag.h"
15:
16: #include <ctype.h>
17: #include <stdlib.h>
18: #include <string.h>
19: #include <assert.h>
20: #include <setjmp.h>
21:
22: #ifdef HAVE_LUA_H
23: #include <lua.h>
24: #include <lauxlib.h>
25:
26: #define LUA_RIDX_LIGHTTPD_SERVER "lighty.srv"
27: #define LUA_RIDX_LIGHTTPD_CONNECTION "lighty.con"
28:
29: #define MAGNET_CONFIG_RAW_URL "magnet.attract-raw-url-to"
30: #define MAGNET_CONFIG_PHYSICAL_PATH "magnet.attract-physical-path-to"
31: #define MAGNET_RESTART_REQUEST 99
32:
33: /* plugin config for all request/connections */
34:
35: static jmp_buf exceptionjmp;
36:
37: typedef struct {
38: array *url_raw;
39: array *physical_path;
40: } plugin_config;
41:
42: typedef struct {
43: PLUGIN_DATA;
44:
45: script_cache *cache;
46:
47: buffer *encode_buf;
48:
49: plugin_config **config_storage;
50:
51: plugin_config conf;
52: } plugin_data;
53:
54: /* init the plugin data */
55: INIT_FUNC(mod_magnet_init) {
56: plugin_data *p;
57:
58: p = calloc(1, sizeof(*p));
59:
60: p->cache = script_cache_init();
61: p->encode_buf = buffer_init();
62:
63: return p;
64: }
65:
66: /* detroy the plugin data */
67: FREE_FUNC(mod_magnet_free) {
68: plugin_data *p = p_d;
69:
70: UNUSED(srv);
71:
72: if (!p) return HANDLER_GO_ON;
73:
74: if (p->config_storage) {
75: size_t i;
76:
77: for (i = 0; i < srv->config_context->used; i++) {
78: plugin_config *s = p->config_storage[i];
79:
80: if (NULL == s) continue;
81:
82: array_free(s->url_raw);
83: array_free(s->physical_path);
84:
85: free(s);
86: }
87: free(p->config_storage);
88: }
89:
90: script_cache_free(p->cache);
91: buffer_free(p->encode_buf);
92:
93: free(p);
94:
95: return HANDLER_GO_ON;
96: }
97:
98: /* handle plugin config and check values */
99:
100: SETDEFAULTS_FUNC(mod_magnet_set_defaults) {
101: plugin_data *p = p_d;
102: size_t i = 0;
103:
104: config_values_t cv[] = {
105: { MAGNET_CONFIG_RAW_URL, NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
106: { MAGNET_CONFIG_PHYSICAL_PATH, NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
107: { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
108: };
109:
110: if (!p) return HANDLER_ERROR;
111:
112: p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
113:
114: for (i = 0; i < srv->config_context->used; i++) {
115: data_config const* config = (data_config const*)srv->config_context->data[i];
116: plugin_config *s;
117:
118: s = calloc(1, sizeof(plugin_config));
119: s->url_raw = array_init();
120: s->physical_path = array_init();
121:
122: cv[0].destination = s->url_raw;
123: cv[1].destination = s->physical_path;
124:
125: p->config_storage[i] = s;
126:
127: if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
128: return HANDLER_ERROR;
129: }
130: }
131:
132: return HANDLER_GO_ON;
133: }
134:
135: #define PATCH(x) \
136: p->conf.x = s->x;
137: static int mod_magnet_patch_connection(server *srv, connection *con, plugin_data *p) {
138: size_t i, j;
139: plugin_config *s = p->config_storage[0];
140:
141: PATCH(url_raw);
142: PATCH(physical_path);
143:
144: /* skip the first, the global context */
145: for (i = 1; i < srv->config_context->used; i++) {
146: data_config *dc = (data_config *)srv->config_context->data[i];
147: s = p->config_storage[i];
148:
149: /* condition didn't match */
150: if (!config_check_cond(srv, con, dc)) continue;
151:
152: /* merge config */
153: for (j = 0; j < dc->value->used; j++) {
154: data_unset *du = dc->value->data[j];
155:
156: if (buffer_is_equal_string(du->key, CONST_STR_LEN(MAGNET_CONFIG_RAW_URL))) {
157: PATCH(url_raw);
158: } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(MAGNET_CONFIG_PHYSICAL_PATH))) {
159: PATCH(physical_path);
160: }
161: }
162: }
163:
164: return 0;
165: }
166: #undef PATCH
167:
168: #if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM < 502
169: /* lua5.1 backward compat definition */
170: static void lua_pushglobaltable(lua_State *L) { /* (-0, +1, -) */
171: lua_pushvalue(L, LUA_GLOBALSINDEX);
172: }
173: #endif
174:
175: static void magnet_setfenv_mainfn(lua_State *L, int funcIndex) { /* (-1, 0, -) */
176: #if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM >= 502
177: /* set "_ENV" upvalue, which should be the first upvalue of a "main" lua
178: * function if it uses any global names
179: */
180:
181: const char* first_upvalue_name = lua_getupvalue(L, funcIndex, 1);
182: if (NULL == first_upvalue_name) return; /* doesn't have any upvalues */
183: lua_pop(L, 1); /* only need the name of the upvalue, not the value */
184:
185: if (0 != strcmp(first_upvalue_name, "_ENV")) return;
186:
187: if (NULL == lua_setupvalue(L, funcIndex, 1)) {
188: /* pop value if lua_setupvalue didn't set the (not existing) upvalue */
189: lua_pop(L, 1);
190: }
191: #else
192: lua_setfenv(L, funcIndex);
193: #endif
194: }
195:
196: #if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM < 502
197: /* lua 5.2 already supports __pairs */
198:
199: /* See http://lua-users.org/wiki/GeneralizedPairsAndIpairs for implementation details.
200: * Override the default pairs() function to allow us to use a __pairs metakey
201: */
202: static int magnet_pairs(lua_State *L) {
203: luaL_checkany(L, 1); /* "self" */
204:
205: if (luaL_getmetafield(L, 1, "__pairs")) {
206: /* call __pairs(self) */
207: lua_pushvalue(L, 1);
208: lua_call(L, 1, 3);
209: } else {
210: /* call <original-pairs-method>(self) */
211: lua_pushvalue(L, lua_upvalueindex(1));
212: lua_pushvalue(L, 1);
213: lua_call(L, 1, 3);
214: }
215: return 3;
216: }
217: #endif
218:
219: /* Define a function that will iterate over an array* (in upval 1) using current position (upval 2) */
220: static int magnet_array_next(lua_State *L) {
221: data_unset *du;
222: data_string *ds;
223: data_integer *di;
224:
225: size_t pos = lua_tointeger(L, lua_upvalueindex(1));
226: array *a = lua_touserdata(L, lua_upvalueindex(2));
227:
228: lua_settop(L, 0);
229:
230: if (pos >= a->used) return 0;
231: if (NULL != (du = a->data[pos])) {
232: lua_pushlstring(L, CONST_BUF_LEN(du->key));
233: switch (du->type) {
234: case TYPE_STRING:
235: ds = (data_string *)du;
236: if (!buffer_is_empty(ds->value)) {
237: lua_pushlstring(L, CONST_BUF_LEN(ds->value));
238: } else {
239: lua_pushnil(L);
240: }
241: break;
242: case TYPE_COUNT:
243: case TYPE_INTEGER:
244: di = (data_integer *)du;
245: lua_pushinteger(L, di->value);
246: break;
247: default:
248: lua_pushnil(L);
249: break;
250: }
251:
252: /* Update our positional upval to reflect our new current position */
253: pos++;
254: lua_pushinteger(L, pos);
255: lua_replace(L, lua_upvalueindex(1));
256:
257: /* Returning 2 items on the stack (key, value) */
258: return 2;
259: }
260: return 0;
261: }
262:
263: /* Create the closure necessary to iterate over the array *a with the above function */
264: static int magnet_array_pairs(lua_State *L, array *a) {
265: lua_pushinteger(L, 0); /* Push our current pos (the start) into upval 1 */
266: lua_pushlightuserdata(L, a); /* Push our array *a into upval 2 */
267: lua_pushcclosure(L, magnet_array_next, 2); /* Push our new closure with 2 upvals */
268: return 1;
269: }
270:
271: static server* magnet_get_server(lua_State *L) {
272: server *srv;
273:
274: lua_getfield(L, LUA_REGISTRYINDEX, LUA_RIDX_LIGHTTPD_SERVER);
275: srv = lua_touserdata(L, -1);
276: lua_pop(L, 1);
277:
278: return srv;
279: }
280:
281: static connection* magnet_get_connection(lua_State *L) {
282: connection *con;
283:
284: lua_getfield(L, LUA_REGISTRYINDEX, LUA_RIDX_LIGHTTPD_CONNECTION);
285: con = lua_touserdata(L, -1);
286: lua_pop(L, 1);
287:
288: return con;
289: }
290:
291: typedef struct {
292: const char *ptr;
293: size_t len;
294: } const_buffer;
295:
296: static const_buffer magnet_checkconstbuffer(lua_State *L, int index) {
297: const_buffer cb;
298: cb.ptr = luaL_checklstring(L, index, &cb.len);
299: return cb;
300: }
301:
302: static buffer* magnet_checkbuffer(lua_State *L, int index) {
303: const_buffer cb = magnet_checkconstbuffer(L, index);
304: buffer *b = buffer_init();
305: buffer_copy_string_len(b, cb.ptr, cb.len);
306: return b;
307: }
308:
309: static int magnet_print(lua_State *L) {
310: buffer *b = magnet_checkbuffer(L, 1);
311:
312: log_error_write(magnet_get_server(L), __FILE__, __LINE__, "sB",
313: "(lua-print)",
314: b);
315:
316: buffer_free(b);
317:
318: return 0;
319: }
320:
321: static int magnet_stat(lua_State *L) {
322: buffer *sb = magnet_checkbuffer(L, 1);
323: server *srv = magnet_get_server(L);
324: connection *con = magnet_get_connection(L);
325: stat_cache_entry *sce = NULL;
326: handler_t res;
327:
328: res = stat_cache_get_entry(srv, con, sb, &sce);
329: buffer_free(sb);
330:
331: if (HANDLER_GO_ON != res) {
332: lua_pushnil(L);
333: return 1;
334: }
335:
336: lua_newtable(L); // return value
337:
338: lua_pushboolean(L, S_ISREG(sce->st.st_mode));
339: lua_setfield(L, -2, "is_file");
340:
341: lua_pushboolean(L, S_ISDIR(sce->st.st_mode));
342: lua_setfield(L, -2, "is_dir");
343:
344: lua_pushboolean(L, S_ISCHR(sce->st.st_mode));
345: lua_setfield(L, -2, "is_char");
346:
347: lua_pushboolean(L, S_ISBLK(sce->st.st_mode));
348: lua_setfield(L, -2, "is_block");
349:
350: lua_pushboolean(L, S_ISSOCK(sce->st.st_mode));
351: lua_setfield(L, -2, "is_socket");
352:
353: lua_pushboolean(L, S_ISLNK(sce->st.st_mode));
354: lua_setfield(L, -2, "is_link");
355:
356: lua_pushboolean(L, S_ISFIFO(sce->st.st_mode));
357: lua_setfield(L, -2, "is_fifo");
358:
359: lua_pushinteger(L, sce->st.st_mtime);
360: lua_setfield(L, -2, "st_mtime");
361:
362: lua_pushinteger(L, sce->st.st_ctime);
363: lua_setfield(L, -2, "st_ctime");
364:
365: lua_pushinteger(L, sce->st.st_atime);
366: lua_setfield(L, -2, "st_atime");
367:
368: lua_pushinteger(L, sce->st.st_uid);
369: lua_setfield(L, -2, "st_uid");
370:
371: lua_pushinteger(L, sce->st.st_gid);
372: lua_setfield(L, -2, "st_gid");
373:
374: lua_pushinteger(L, sce->st.st_size);
375: lua_setfield(L, -2, "st_size");
376:
377: lua_pushinteger(L, sce->st.st_ino);
378: lua_setfield(L, -2, "st_ino");
379:
380: if (!buffer_string_is_empty(sce->etag)) {
381: /* we have to mutate the etag */
382: buffer *b = buffer_init();
383: etag_mutate(b, sce->etag);
384:
385: lua_pushlstring(L, CONST_BUF_LEN(b));
386: buffer_free(b);
387: } else {
388: lua_pushnil(L);
389: }
390: lua_setfield(L, -2, "etag");
391:
392: if (!buffer_string_is_empty(sce->content_type)) {
393: lua_pushlstring(L, CONST_BUF_LEN(sce->content_type));
394: } else {
395: lua_pushnil(L);
396: }
397: lua_setfield(L, -2, "content-type");
398:
399: return 1;
400: }
401:
402:
403: static int magnet_atpanic(lua_State *L) {
404: buffer *b = magnet_checkbuffer(L, 1);
405:
406: log_error_write(magnet_get_server(L), __FILE__, __LINE__, "sB",
407: "(lua-atpanic)",
408: b);
409:
410: buffer_free(b);
411:
412: longjmp(exceptionjmp, 1);
413: }
414:
415: static int magnet_reqhdr_get(lua_State *L) {
416: connection *con = magnet_get_connection(L);
417: data_string *ds;
418:
419: /* __index: param 1 is the (empty) table the value was not found in */
420: const char *key = luaL_checkstring(L, 2);
421:
422: if (NULL != (ds = (data_string *)array_get_element(con->request.headers, key))) {
423: if (!buffer_is_empty(ds->value)) {
424: lua_pushlstring(L, CONST_BUF_LEN(ds->value));
425: } else {
426: lua_pushnil(L);
427: }
428: } else {
429: lua_pushnil(L);
430: }
431: return 1;
432: }
433:
434: static int magnet_reqhdr_pairs(lua_State *L) {
435: connection *con = magnet_get_connection(L);
436:
437: return magnet_array_pairs(L, con->request.headers);
438: }
439:
440: static int magnet_status_get(lua_State *L) {
441: data_integer *di;
442: server *srv = magnet_get_server(L);
443:
444: /* __index: param 1 is the (empty) table the value was not found in */
445: const_buffer key = magnet_checkconstbuffer(L, 2);
446:
447: di = status_counter_get_counter(srv, key.ptr, key.len);
448:
449: lua_pushinteger(L, (lua_Integer)di->value);
450:
451: return 1;
452: }
453:
454: static int magnet_status_set(lua_State *L) {
455: server *srv = magnet_get_server(L);
456:
457: /* __newindex: param 1 is the (empty) table the value is supposed to be set in */
458: const_buffer key = magnet_checkconstbuffer(L, 2);
459: int counter = (int) luaL_checkinteger(L, 3);
460:
461: status_counter_set(srv, key.ptr, key.len, counter);
462:
463: return 0;
464: }
465:
466: static int magnet_status_pairs(lua_State *L) {
467: server *srv = magnet_get_server(L);
468:
469: return magnet_array_pairs(L, srv->status);
470: }
471:
472: typedef struct {
473: const char *name;
474: enum {
475: MAGNET_ENV_UNSET,
476:
477: MAGNET_ENV_PHYICAL_PATH,
478: MAGNET_ENV_PHYICAL_REL_PATH,
479: MAGNET_ENV_PHYICAL_DOC_ROOT,
480: MAGNET_ENV_PHYICAL_BASEDIR,
481:
482: MAGNET_ENV_URI_PATH,
483: MAGNET_ENV_URI_PATH_RAW,
484: MAGNET_ENV_URI_SCHEME,
485: MAGNET_ENV_URI_AUTHORITY,
486: MAGNET_ENV_URI_QUERY,
487:
488: MAGNET_ENV_REQUEST_METHOD,
489: MAGNET_ENV_REQUEST_URI,
490: MAGNET_ENV_REQUEST_ORIG_URI,
491: MAGNET_ENV_REQUEST_PATH_INFO,
492: MAGNET_ENV_REQUEST_REMOTE_IP,
493: MAGNET_ENV_REQUEST_PROTOCOL
494: } type;
495: } magnet_env_t;
496:
497: static const magnet_env_t magnet_env[] = {
498: { "physical.path", MAGNET_ENV_PHYICAL_PATH },
499: { "physical.rel-path", MAGNET_ENV_PHYICAL_REL_PATH },
500: { "physical.doc-root", MAGNET_ENV_PHYICAL_DOC_ROOT },
501: { "physical.basedir", MAGNET_ENV_PHYICAL_BASEDIR },
502:
503: { "uri.path", MAGNET_ENV_URI_PATH },
504: { "uri.path-raw", MAGNET_ENV_URI_PATH_RAW },
505: { "uri.scheme", MAGNET_ENV_URI_SCHEME },
506: { "uri.authority", MAGNET_ENV_URI_AUTHORITY },
507: { "uri.query", MAGNET_ENV_URI_QUERY },
508:
509: { "request.method", MAGNET_ENV_REQUEST_METHOD },
510: { "request.uri", MAGNET_ENV_REQUEST_URI },
511: { "request.orig-uri", MAGNET_ENV_REQUEST_ORIG_URI },
512: { "request.path-info", MAGNET_ENV_REQUEST_PATH_INFO },
513: { "request.remote-ip", MAGNET_ENV_REQUEST_REMOTE_IP },
514: { "request.protocol", MAGNET_ENV_REQUEST_PROTOCOL },
515:
516: { NULL, MAGNET_ENV_UNSET }
517: };
518:
519: static buffer *magnet_env_get_buffer_by_id(server *srv, connection *con, int id) {
520: buffer *dest = NULL;
521:
522: UNUSED(srv);
523:
524: /**
525: * map all internal variables to lua
526: *
527: */
528:
529: switch (id) {
530: case MAGNET_ENV_PHYICAL_PATH: dest = con->physical.path; break;
531: case MAGNET_ENV_PHYICAL_REL_PATH: dest = con->physical.rel_path; break;
532: case MAGNET_ENV_PHYICAL_DOC_ROOT: dest = con->physical.doc_root; break;
533: case MAGNET_ENV_PHYICAL_BASEDIR: dest = con->physical.basedir; break;
534:
535: case MAGNET_ENV_URI_PATH: dest = con->uri.path; break;
536: case MAGNET_ENV_URI_PATH_RAW: dest = con->uri.path_raw; break;
537: case MAGNET_ENV_URI_SCHEME: dest = con->uri.scheme; break;
538: case MAGNET_ENV_URI_AUTHORITY: dest = con->uri.authority; break;
539: case MAGNET_ENV_URI_QUERY: dest = con->uri.query; break;
540:
541: case MAGNET_ENV_REQUEST_METHOD:
542: buffer_copy_string(srv->tmp_buf, get_http_method_name(con->request.http_method));
543: dest = srv->tmp_buf;
544: break;
545: case MAGNET_ENV_REQUEST_URI: dest = con->request.uri; break;
546: case MAGNET_ENV_REQUEST_ORIG_URI: dest = con->request.orig_uri; break;
547: case MAGNET_ENV_REQUEST_PATH_INFO: dest = con->request.pathinfo; break;
548: case MAGNET_ENV_REQUEST_REMOTE_IP: dest = con->dst_addr_buf; break;
549: case MAGNET_ENV_REQUEST_PROTOCOL:
550: buffer_copy_string(srv->tmp_buf, get_http_version_name(con->request.http_version));
551: dest = srv->tmp_buf;
552: break;
553:
554: case MAGNET_ENV_UNSET: break;
555: }
556:
557: return dest;
558: }
559:
560: static buffer *magnet_env_get_buffer(server *srv, connection *con, const char *key) {
561: size_t i;
562:
563: for (i = 0; magnet_env[i].name; i++) {
564: if (0 == strcmp(key, magnet_env[i].name)) break;
565: }
566:
567: return magnet_env_get_buffer_by_id(srv, con, magnet_env[i].type);
568: }
569:
570: static int magnet_env_get(lua_State *L) {
571: server *srv = magnet_get_server(L);
572: connection *con = magnet_get_connection(L);
573:
574: /* __index: param 1 is the (empty) table the value was not found in */
575: const char *key = luaL_checkstring(L, 2);
576: buffer *dest = NULL;
577:
578: dest = magnet_env_get_buffer(srv, con, key);
579:
580: if (!buffer_is_empty(dest)) {
581: lua_pushlstring(L, CONST_BUF_LEN(dest));
582: } else {
583: lua_pushnil(L);
584: }
585:
586: return 1;
587: }
588:
589: static int magnet_env_set(lua_State *L) {
590: server *srv = magnet_get_server(L);
591: connection *con = magnet_get_connection(L);
592:
593: /* __newindex: param 1 is the (empty) table the value is supposed to be set in */
594: const char *key = luaL_checkstring(L, 2);
595: buffer *dest = NULL;
596:
597: luaL_checkany(L, 3); /* nil or a string */
598:
599: if (NULL != (dest = magnet_env_get_buffer(srv, con, key))) {
600: if (lua_isnil(L, 3)) {
601: buffer_reset(dest);
602: } else {
603: const_buffer val = magnet_checkconstbuffer(L, 3);
604: buffer_copy_string_len(dest, val.ptr, val.len);
605: }
606: } else {
607: /* couldn't save */
608:
609: return luaL_error(L, "couldn't store '%s' in lighty.env[]", key);
610: }
611:
612: return 0;
613: }
614:
615: static int magnet_env_next(lua_State *L) {
616: server *srv = magnet_get_server(L);
617: connection *con = magnet_get_connection(L);
618: const int pos = lua_tointeger(L, lua_upvalueindex(1));
619:
620: buffer *dest;
621:
622: /* ignore previous key: use upvalue for current pos */
623: lua_settop(L, 0);
624:
625: if (NULL == magnet_env[pos].name) return 0; /* end of list */
626: /* Update our positional upval to reflect our new current position */
627: lua_pushinteger(L, pos + 1);
628: lua_replace(L, lua_upvalueindex(1));
629:
630: /* key to return */
631: lua_pushstring(L, magnet_env[pos].name);
632:
633: /* get value */
634: dest = magnet_env_get_buffer_by_id(srv, con, magnet_env[pos].type);
635: if (!buffer_is_empty(dest)) {
636: lua_pushlstring(L, CONST_BUF_LEN(dest));
637: } else {
638: lua_pushnil(L);
639: }
640:
641: /* return 2 items on the stack (key, value) */
642: return 2;
643: }
644:
645: static int magnet_env_pairs(lua_State *L) {
646: lua_pushinteger(L, 0); /* Push our current pos (the start) into upval 1 */
647: lua_pushcclosure(L, magnet_env_next, 1); /* Push our new closure with 1 upvals */
648: return 1;
649: }
650:
651: static int magnet_cgi_get(lua_State *L) {
652: connection *con = magnet_get_connection(L);
653: data_string *ds;
654:
655: /* __index: param 1 is the (empty) table the value was not found in */
656: const char *key = luaL_checkstring(L, 2);
657:
658: ds = (data_string *)array_get_element(con->environment, key);
659: if (NULL != ds && !buffer_is_empty(ds->value))
660: lua_pushlstring(L, CONST_BUF_LEN(ds->value));
661: else
662: lua_pushnil(L);
663:
664: return 1;
665: }
666:
667: static int magnet_cgi_set(lua_State *L) {
668: connection *con = magnet_get_connection(L);
669:
670: /* __newindex: param 1 is the (empty) table the value is supposed to be set in */
671: const_buffer key = magnet_checkconstbuffer(L, 2);
672: const_buffer val = magnet_checkconstbuffer(L, 2);
673:
674: array_set_key_value(con->environment, key.ptr, key.len, val.ptr, val.len);
675:
676: return 0;
677: }
678:
679: static int magnet_cgi_pairs(lua_State *L) {
680: connection *con = magnet_get_connection(L);
681:
682: return magnet_array_pairs(L, con->environment);
683: }
684:
685:
686: static int magnet_copy_response_header(server *srv, connection *con, lua_State *L, int lighty_table_ndx) {
687: force_assert(lua_istable(L, lighty_table_ndx));
688:
689: lua_getfield(L, lighty_table_ndx, "header"); /* lighty.header */
690: if (lua_istable(L, -1)) {
691: /* header is found, and is a table */
692:
693: lua_pushnil(L);
694: while (lua_next(L, -2) != 0) {
695: if (lua_isstring(L, -1) && lua_isstring(L, -2)) {
696: const_buffer key = magnet_checkconstbuffer(L, -2);
697: const_buffer val = magnet_checkconstbuffer(L, -1);
698:
699: response_header_overwrite(srv, con, key.ptr, key.len, val.ptr, val.len);
700: }
701:
702: lua_pop(L, 1);
703: }
704: }
705: lua_pop(L, 1); /* pop lighty.header */
706:
707: return 0;
708: }
709:
710: /**
711: * walk through the content array
712: *
713: * content = { "<pre>", { file = "/content" } , "</pre>" }
714: *
715: * header["Content-Type"] = "text/html"
716: *
717: * return 200
718: */
719: static int magnet_attach_content(server *srv, connection *con, lua_State *L, int lighty_table_ndx) {
720: force_assert(lua_istable(L, lighty_table_ndx));
721:
722: lua_getfield(L, lighty_table_ndx, "content"); /* lighty.content */
723: if (lua_istable(L, -1)) {
724: int i;
725: /* content is found, and is a table */
726:
727: for (i = 1; ; i++) {
728: lua_rawgeti(L, -1, i);
729:
730: /* -1 is the value and should be the value ... aka a table */
731: if (lua_isstring(L, -1)) {
732: const_buffer data = magnet_checkconstbuffer(L, -1);
733:
734: chunkqueue_append_mem(con->write_queue, data.ptr, data.len);
735: } else if (lua_istable(L, -1)) {
736: lua_getfield(L, -1, "filename");
737: lua_getfield(L, -2, "length"); /* (0-based) end of range (not actually "length") */
738: lua_getfield(L, -3, "offset"); /* (0-based) start of range */
739:
740: if (lua_isstring(L, -3)) { /* filename has to be a string */
741: buffer *fn = magnet_checkbuffer(L, -3);
742: off_t off = (off_t) luaL_optinteger(L, -1, 0);
743: off_t len = (off_t) luaL_optinteger(L, -2, -1); /*(-1 to http_chunk_append_file_range() uses file size minus offset)*/
744: if (off < 0) {
745: buffer_free(fn);
746: return luaL_error(L, "offset for '%s' is negative", lua_tostring(L, -3));
747: }
748:
749: if (len >= off) {
750: len -= off;
751: } else if (-1 != len) {
752: buffer_free(fn);
753: return luaL_error(L, "offset > length for '%s'", lua_tostring(L, -3));
754: }
755:
756: if (0 != len && 0 != http_chunk_append_file_range(srv, con, fn, off, len)) {
757: buffer_free(fn);
758: return luaL_error(L, "error opening file content '%s' at offset %lld", lua_tostring(L, -3), (long long)off);
759: }
760:
761: buffer_free(fn);
762: } else {
763: return luaL_error(L, "content[%d] is a table and requires the field \"filename\"", i);
764: }
765:
766: lua_pop(L, 3);
767: } else if (lua_isnil(L, -1)) {
768: /* end of list */
769:
770: lua_pop(L, 1);
771:
772: break;
773: } else {
774: return luaL_error(L, "content[%d] is neither a string nor a table: ", i);
775: }
776:
777: lua_pop(L, 1); /* pop the content[...] entry value */
778: }
779: } else {
780: return luaL_error(L, "lighty.content has to be a table");
781: }
782: lua_pop(L, 1); /* pop lighty.content */
783:
784: return 0;
785: }
786:
787: static int traceback(lua_State *L) {
788: if (!lua_isstring(L, 1)) /* 'message' not a string? */
789: return 1; /* keep it intact */
790: lua_getglobal(L, "debug");
791: if (!lua_istable(L, -1)) {
792: lua_pop(L, 1);
793: return 1;
794: }
795: lua_getfield(L, -1, "traceback");
796: if (!lua_isfunction(L, -1)) {
797: lua_pop(L, 2);
798: return 1;
799: }
800: lua_pushvalue(L, 1); /* pass error message */
801: lua_pushinteger(L, 2); /* skip this function and traceback */
802: lua_call(L, 2, 1); /* call debug.traceback */
803: return 1;
804: }
805:
806: /* push traceback function before calling lua_pcall after narg arguments
807: * have been pushed (inserts it before the arguments). returns index for
808: * traceback function ("msgh" in lua_pcall)
809: */
810: static int push_traceback(lua_State *L, int narg) {
811: int base = lua_gettop(L) - narg; /* function index */
812: lua_pushcfunction(L, traceback);
813: lua_insert(L, base);
814: return base;
815: }
816:
817: static handler_t magnet_attract(server *srv, connection *con, plugin_data *p, buffer *name) {
818: lua_State *L;
819: int lua_return_value;
820: const int func_ndx = 1;
821: const int lighty_table_ndx = 2;
822:
823: /* get the script-context */
824: L = script_cache_get_script(srv, con, p->cache, name);
825:
826: if (lua_isstring(L, -1)) {
827: log_error_write(srv, __FILE__, __LINE__,
828: "sbss",
829: "loading script",
830: name,
831: "failed:",
832: lua_tostring(L, -1));
833:
834: lua_pop(L, 1);
835:
836: force_assert(lua_gettop(L) == 0); /* only the error should have been on the stack */
837:
838: con->http_status = 500;
839: con->mode = DIRECT;
840:
841: return HANDLER_FINISHED;
842: }
843:
844: force_assert(lua_gettop(L) == 1);
845: force_assert(lua_isfunction(L, func_ndx));
846:
847: lua_pushlightuserdata(L, srv);
848: lua_setfield(L, LUA_REGISTRYINDEX, LUA_RIDX_LIGHTTPD_SERVER);
849:
850: lua_pushlightuserdata(L, con);
851: lua_setfield(L, LUA_REGISTRYINDEX, LUA_RIDX_LIGHTTPD_CONNECTION);
852:
853: lua_atpanic(L, magnet_atpanic);
854:
855: /**
856: * we want to create empty environment for our script
857: *
858: * setmetatable({}, {__index = _G})
859: *
860: * if a function symbol is not defined in our env, __index will lookup
861: * in the global env.
862: *
863: * all variables created in the script-env will be thrown
864: * away at the end of the script run.
865: */
866: lua_newtable(L); /* my empty environment aka {} (sp += 1) */
867:
868: /* we have to overwrite the print function */
869: lua_pushcfunction(L, magnet_print); /* (sp += 1) */
870: lua_setfield(L, -2, "print"); /* -1 is the env we want to set(sp -= 1) */
871:
872: /**
873: * lighty.request[] (ro) has the HTTP-request headers
874: * lighty.env[] (rw) has various url/physical file paths and
875: * request meta data; might contain nil values
876: * lighty.req_env[] (ro) has the cgi environment
877: * lighty.status[] (ro) has the status counters
878: * lighty.content[] (rw) is a table of string/file
879: * lighty.header[] (rw) is a array to set response headers
880: */
881:
882: lua_newtable(L); /* lighty.* (sp += 1) */
883:
884: lua_newtable(L); /* {} (sp += 1) */
885: lua_newtable(L); /* the meta-table for the request-table (sp += 1) */
886: lua_pushcfunction(L, magnet_reqhdr_get); /* (sp += 1) */
887: lua_setfield(L, -2, "__index"); /* (sp -= 1) */
888: lua_pushcfunction(L, magnet_reqhdr_pairs); /* (sp += 1) */
889: lua_setfield(L, -2, "__pairs"); /* (sp -= 1) */
890: lua_setmetatable(L, -2); /* tie the metatable to request (sp -= 1) */
891: lua_setfield(L, -2, "request"); /* content = {} (sp -= 1) */
892:
893: lua_newtable(L); /* {} (sp += 1) */
894: lua_newtable(L); /* the meta-table for the env-table (sp += 1) */
895: lua_pushcfunction(L, magnet_env_get); /* (sp += 1) */
896: lua_setfield(L, -2, "__index"); /* (sp -= 1) */
897: lua_pushcfunction(L, magnet_env_set); /* (sp += 1) */
898: lua_setfield(L, -2, "__newindex"); /* (sp -= 1) */
899: lua_pushcfunction(L, magnet_env_pairs); /* (sp += 1) */
900: lua_setfield(L, -2, "__pairs"); /* (sp -= 1) */
901: lua_setmetatable(L, -2); /* tie the metatable to env (sp -= 1) */
902: lua_setfield(L, -2, "env"); /* content = {} (sp -= 1) */
903:
904: lua_newtable(L); /* {} (sp += 1) */
905: lua_newtable(L); /* the meta-table for the req_env-table (sp += 1) */
906: lua_pushcfunction(L, magnet_cgi_get); /* (sp += 1) */
907: lua_setfield(L, -2, "__index"); /* (sp -= 1) */
908: lua_pushcfunction(L, magnet_cgi_set); /* (sp += 1) */
909: lua_setfield(L, -2, "__newindex"); /* (sp -= 1) */
910: lua_pushcfunction(L, magnet_cgi_pairs); /* (sp += 1) */
911: lua_setfield(L, -2, "__pairs"); /* (sp -= 1) */
912: lua_setmetatable(L, -2); /* tie the metatable to req_env (sp -= 1) */
913: lua_setfield(L, -2, "req_env"); /* content = {} (sp -= 1) */
914:
915: lua_newtable(L); /* {} (sp += 1) */
916: lua_newtable(L); /* the meta-table for the status-table (sp += 1) */
917: lua_pushcfunction(L, magnet_status_get); /* (sp += 1) */
918: lua_setfield(L, -2, "__index"); /* (sp -= 1) */
919: lua_pushcfunction(L, magnet_status_set); /* (sp += 1) */
920: lua_setfield(L, -2, "__newindex"); /* (sp -= 1) */
921: lua_pushcfunction(L, magnet_status_pairs); /* (sp += 1) */
922: lua_setfield(L, -2, "__pairs"); /* (sp -= 1) */
923: lua_setmetatable(L, -2); /* tie the metatable to statzs (sp -= 1) */
924: lua_setfield(L, -2, "status"); /* content = {} (sp -= 1) */
925:
926: /* add empty 'content' and 'header' tables */
927: lua_newtable(L); /* {} (sp += 1) */
928: lua_setfield(L, -2, "content"); /* content = {} (sp -= 1) */
929:
930: lua_newtable(L); /* {} (sp += 1) */
931: lua_setfield(L, -2, "header"); /* header = {} (sp -= 1) */
932:
933: lua_pushinteger(L, MAGNET_RESTART_REQUEST);
934: lua_setfield(L, -2, "RESTART_REQUEST");
935:
936: lua_pushcfunction(L, magnet_stat); /* (sp += 1) */
937: lua_setfield(L, -2, "stat"); /* -1 is the env we want to set (sp -= 1) */
938:
939: /* insert lighty table at index 2 */
940: lua_pushvalue(L, -1);
941: lua_insert(L, lighty_table_ndx);
942:
943: lua_setfield(L, -2, "lighty"); /* lighty.* (sp -= 1) */
944:
945: #if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM < 502
946: /* override the default pairs() function to our __pairs capable version;
947: * not needed for lua 5.2+
948: */
949: lua_getglobal(L, "pairs"); /* push original pairs() (sp += 1) */
950: lua_pushcclosure(L, magnet_pairs, 1);
951: lua_setfield(L, -2, "pairs"); /* (sp -= 1) */
952: #endif
953:
954: lua_newtable(L); /* the meta-table for the new env (sp += 1) */
955: lua_pushglobaltable(L); /* (sp += 1) */
956: lua_setfield(L, -2, "__index"); /* { __index = _G } (sp -= 1) */
957: lua_setmetatable(L, -2); /* setmetatable({}, {__index = _G}) (sp -= 1) */
958:
959: magnet_setfenv_mainfn(L, 1); /* (sp -= 1) */
960:
961: /* pcall will destroy the func value, duplicate it */ /* (sp += 1) */
962: lua_pushvalue(L, func_ndx);
963: {
964: int errfunc = push_traceback(L, 0);
965: int ret = lua_pcall(L, 0, 1, errfunc);
966: lua_remove(L, errfunc);
967:
968: /* reset environment */
969: lua_pushglobaltable(L); /* (sp += 1) */
970: magnet_setfenv_mainfn(L, 1); /* (sp -= 1) */
971:
972: if (0 != ret) {
973: log_error_write(srv, __FILE__, __LINE__,
974: "ss",
975: "lua_pcall():",
976: lua_tostring(L, -1));
977: lua_pop(L, 2); /* remove the error-msg and the lighty table at index 2 */
978:
979: force_assert(lua_gettop(L) == 1); /* only the function should be on the stack */
980:
981: con->http_status = 500;
982: con->mode = DIRECT;
983:
984: return HANDLER_FINISHED;
985: }
986: }
987:
988: /* we should have the function, the lighty table and the return value on the stack */
989: force_assert(lua_gettop(L) == 3);
990:
991: lua_return_value = (int) luaL_optinteger(L, -1, -1);
992: lua_pop(L, 1); /* pop return value */
993:
994: magnet_copy_response_header(srv, con, L, lighty_table_ndx);
995:
996: {
997: handler_t result = HANDLER_GO_ON;
998:
999: if (lua_return_value > 99) {
1000: con->http_status = lua_return_value;
1001: con->file_finished = 1;
1002:
1003: /* try { ...*/
1004: if (0 == setjmp(exceptionjmp)) {
1005: magnet_attach_content(srv, con, L, lighty_table_ndx);
1006: if (!chunkqueue_is_empty(con->write_queue)) {
1007: con->mode = p->id;
1008: }
1009: } else {
1010: lua_settop(L, 2); /* remove all but function and lighty table */
1011: /* } catch () { */
1012: con->http_status = 500;
1013: con->mode = DIRECT;
1014: }
1015:
1016: result = HANDLER_FINISHED;
1017: } else if (MAGNET_RESTART_REQUEST == lua_return_value) {
1018: result = HANDLER_COMEBACK;
1019: }
1020:
1021: lua_pop(L, 1); /* pop the lighty table */
1022: force_assert(lua_gettop(L) == 1); /* only the function should remain on the stack */
1023:
1024: return result;
1025: }
1026: }
1027:
1028: static handler_t magnet_attract_array(server *srv, connection *con, plugin_data *p, array *files) {
1029: size_t i;
1030: handler_t ret = HANDLER_GO_ON;
1031:
1032: /* no filename set */
1033: if (files->used == 0) return HANDLER_GO_ON;
1034:
1035: /**
1036: * execute all files and jump out on the first !HANDLER_GO_ON
1037: */
1038: for (i = 0; i < files->used && ret == HANDLER_GO_ON; i++) {
1039: data_string *ds = (data_string *)files->data[i];
1040:
1041: if (buffer_string_is_empty(ds->value)) continue;
1042:
1043: ret = magnet_attract(srv, con, p, ds->value);
1044: }
1045:
1046: if (con->error_handler_saved_status) {
1047: /* retrieve (possibly modified) REDIRECT_STATUS and store as number */
1048: unsigned long x;
1049: data_string * const ds = (data_string *)array_get_element(con->environment, "REDIRECT_STATUS");
1050: if (ds && (x = strtoul(ds->value->ptr, NULL, 10)) < 1000)
1051: /*(simplified validity check x < 1000)*/
1052: con->error_handler_saved_status =
1053: con->error_handler_saved_status > 0 ? (int)x : -(int)x;
1054: }
1055:
1056: return ret;
1057: }
1058:
1059: URIHANDLER_FUNC(mod_magnet_uri_handler) {
1060: plugin_data *p = p_d;
1061:
1062: mod_magnet_patch_connection(srv, con, p);
1063:
1064: return magnet_attract_array(srv, con, p, p->conf.url_raw);
1065: }
1066:
1067: URIHANDLER_FUNC(mod_magnet_physical) {
1068: plugin_data *p = p_d;
1069:
1070: mod_magnet_patch_connection(srv, con, p);
1071:
1072: return magnet_attract_array(srv, con, p, p->conf.physical_path);
1073: }
1074:
1075:
1076: /* this function is called at dlopen() time and inits the callbacks */
1077:
1078: int mod_magnet_plugin_init(plugin *p);
1079: int mod_magnet_plugin_init(plugin *p) {
1080: p->version = LIGHTTPD_VERSION_ID;
1081: p->name = buffer_init_string("magnet");
1082:
1083: p->init = mod_magnet_init;
1084: p->handle_uri_clean = mod_magnet_uri_handler;
1085: p->handle_physical = mod_magnet_physical;
1086: p->set_defaults = mod_magnet_set_defaults;
1087: p->cleanup = mod_magnet_free;
1088:
1089: p->data = NULL;
1090:
1091: return 0;
1092: }
1093:
1094: #else
1095:
1096: #pragma message("lua is required, but was not found")
1097:
1098: int mod_magnet_plugin_init(plugin *p);
1099: int mod_magnet_plugin_init(plugin *p) {
1100: UNUSED(p);
1101: return -1;
1102: }
1103: #endif
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to mod_magnet.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / lighttpd / src