Annotation of parser3/src/targets/apache13/modules/extra/mod_parser3.C, revision 1.7
1.2 paf 1: /** @file
1.7 ! paf 2: Parser: apache 1.3 module.
1.2 paf 3:
4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
5:
6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
7:
1.7 ! paf 8: $Id: mod_parser3.C,v 1.6 2001/03/21 16:59:05 paf Exp $
1.2 paf 9: */
10:
11: #include "httpd.h"
12: #include "http_config.h"
13: #include "http_core.h"
14: #include "http_log.h"
15: #include "http_main.h"
16: #include "http_protocol.h"
17: #include "util_script.h"
18:
19: #include <stdio.h>
20:
21:
22: #include "pa_common.h"
23: #include "pa_globals.h"
24: #include "pa_request.h"
25:
26: /*--------------------------------------------------------------------------*/
27: /* */
28: /* Data declarations. */
29: /* */
30: /* Here are the static cells and structure declarations private to our */
31: /* module. */
32: /* */
33: /*--------------------------------------------------------------------------*/
34:
35: /*
36: * Sample configuration record. Used for both per-directory and per-server
37: * configuration data.
38: *
39: * It's perfectly reasonable to have two different structures for the two
40: * different environments. The same command handlers will be called for
41: * both, though, so the handlers need to be able to tell them apart. One
42: * possibility is for both structures to start with an int which is zero for
43: * one and 1 for the other.
44: *
45: * Note that while the per-directory and per-server configuration records are
46: * available to most of the module handlers, they should be treated as
47: * READ-ONLY by all except the command and merge handlers. Sometimes handlers
48: * are handed a record that applies to the current location by implication or
49: * inheritance, and modifying it will change the rules for other locations.
50: */
51: typedef struct excfg {
52: int cmode; /* Environment to which record applies (directory,
53: * server, or combination).
54: */
55: #define CONFIG_MODE_SERVER 1
56: #define CONFIG_MODE_DIRECTORY 2
57: #define CONFIG_MODE_COMBO 3 /* Shouldn't ever happen. */
58: int local; /* Boolean: "Example" directive declared here? */
59: int congenital; /* Boolean: did we inherit an "Example"? */
60: char *trace; /* Pointer to trace string. */
61: char *loc; /* Location to which this record applies. */
62: } excfg;
63:
64: /*
65: * Let's set up a module-local static cell to point to the accreting callback
66: * trace. As each API callback is made to us, we'll tack on the particulars
67: * to whatever we've already recorded. To avoid massive memory bloat as
68: * directories are walked again and again, we record the routine/environment
69: * the first time (non-request context only), and ignore subsequent calls for
70: * the same routine/environment.
71: */
72: static const char *trace = NULL;
73: static table *static_calls_made = NULL;
74:
75: /*
76: * To avoid leaking memory from pools other than the per-request one, we
77: * allocate a module-private pool, and then use a sub-pool of that which gets
78: * freed each time we modify the trace. That way previous layers of trace
79: * data don't get lost.
80: */
1.5 paf 81: static pool *parser3_pool = NULL;
82: static pool *parser3_subpool = NULL;
1.2 paf 83:
84: /*
85: * Declare ourselves so the configuration routines can find and know us.
86: * We'll fill it in at the end of the module.
87: */
88: extern "C" module MODULE_VAR_EXPORT parser3_module;
89:
90: /*--------------------------------------------------------------------------*/
91: /* */
92: /* The following pseudo-prototype declarations illustrate the parameters */
93: /* passed to command handlers for the different types of directive */
94: /* syntax. If an argument was specified in the directive definition */
95: /* (look for "command_rec" below), it's available to the command handler */
96: /* via the (void *) info field in the cmd_parms argument passed to the */
97: /* handler (cmd->info for the examples below). */
98: /* */
99: /*--------------------------------------------------------------------------*/
100:
101: /*
102: * Command handler for a NO_ARGS directive.
103: *
104: * static const char *handle_NO_ARGS(cmd_parms *cmd, void *mconfig);
105: */
106:
107: /*
108: * Command handler for a RAW_ARGS directive. The "args" argument is the text
109: * of the commandline following the directive itself.
110: *
111: * static const char *handle_RAW_ARGS(cmd_parms *cmd, void *mconfig,
112: * const char *args);
113: */
114:
115: /*
116: * Command handler for a FLAG directive. The single parameter is passed in
117: * "bool", which is either zero or not for Off or On respectively.
118: *
119: * static const char *handle_FLAG(cmd_parms *cmd, void *mconfig, int bool);
120: */
121:
122: /*
123: * Command handler for a TAKE1 directive. The single parameter is passed in
124: * "word1".
125: *
126: * static const char *handle_TAKE1(cmd_parms *cmd, void *mconfig,
127: * char *word1);
128: */
129:
130: /*
131: * Command handler for a TAKE2 directive. TAKE2 commands must always have
132: * exactly two arguments.
133: *
134: * static const char *handle_TAKE2(cmd_parms *cmd, void *mconfig,
135: * char *word1, char *word2);
136: */
137:
138: /*
139: * Command handler for a TAKE3 directive. Like TAKE2, these must have exactly
140: * three arguments, or the parser complains and doesn't bother calling us.
141: *
142: * static const char *handle_TAKE3(cmd_parms *cmd, void *mconfig,
143: * char *word1, char *word2, char *word3);
144: */
145:
146: /*
147: * Command handler for a TAKE12 directive. These can take either one or two
148: * arguments.
149: * - word2 is a NULL pointer if no second argument was specified.
150: *
151: * static const char *handle_TAKE12(cmd_parms *cmd, void *mconfig,
152: * char *word1, char *word2);
153: */
154:
155: /*
156: * Command handler for a TAKE123 directive. A TAKE123 directive can be given,
157: * as might be expected, one, two, or three arguments.
158: * - word2 is a NULL pointer if no second argument was specified.
159: * - word3 is a NULL pointer if no third argument was specified.
160: *
161: * static const char *handle_TAKE123(cmd_parms *cmd, void *mconfig,
162: * char *word1, char *word2, char *word3);
163: */
164:
165: /*
166: * Command handler for a TAKE13 directive. Either one or three arguments are
167: * permitted - no two-parameters-only syntax is allowed.
168: * - word2 and word3 are NULL pointers if only one argument was specified.
169: *
170: * static const char *handle_TAKE13(cmd_parms *cmd, void *mconfig,
171: * char *word1, char *word2, char *word3);
172: */
173:
174: /*
175: * Command handler for a TAKE23 directive. At least two and as many as three
176: * arguments must be specified.
177: * - word3 is a NULL pointer if no third argument was specified.
178: *
179: * static const char *handle_TAKE23(cmd_parms *cmd, void *mconfig,
180: * char *word1, char *word2, char *word3);
181: */
182:
183: /*
184: * Command handler for a ITERATE directive.
185: * - Handler is called once for each of n arguments given to the directive.
186: * - word1 points to each argument in turn.
187: *
188: * static const char *handle_ITERATE(cmd_parms *cmd, void *mconfig,
189: * char *word1);
190: */
191:
192: /*
193: * Command handler for a ITERATE2 directive.
194: * - Handler is called once for each of the second and subsequent arguments
195: * given to the directive.
196: * - word1 is the same for each call for a particular directive instance (the
197: * first argument).
198: * - word2 points to each of the second and subsequent arguments in turn.
199: *
200: * static const char *handle_ITERATE2(cmd_parms *cmd, void *mconfig,
201: * char *word1, char *word2);
202: */
203:
204: /*--------------------------------------------------------------------------*/
205: /* */
206: /* These routines are strictly internal to this module, and support its */
207: /* operation. They are not referenced by any external portion of the */
208: /* server. */
209: /* */
210: /*--------------------------------------------------------------------------*/
211:
212: /*
213: * Locate our directory configuration record for the current request.
214: */
215: static excfg *our_dconfig(request_rec *r)
216: {
217:
218: return (excfg *) ap_get_module_config(r->per_dir_config, &parser3_module);
219: }
220:
221: #if 0
222: /*
223: * Locate our server configuration record for the specified server.
224: */
225: static excfg *our_sconfig(server_rec *s)
226: {
227:
228: return (excfg *) ap_get_module_config(s->module_config, &parser3_module);
229: }
230:
231: /*
232: * Likewise for our configuration record for the specified request.
233: */
234: static excfg *our_rconfig(request_rec *r)
235: {
236:
237: return (excfg *) ap_get_module_config(r->request_config, &parser3_module);
238: }
239: #endif
240:
241: /*
242: * This routine sets up some module-wide cells if they haven't been already.
243: */
244: static void setup_module_cells()
245: {
246: /*
247: * If we haven't already allocated our module-private pool, do so now.
248: */
1.5 paf 249: if (parser3_pool == NULL) {
250: parser3_pool = ap_make_sub_pool(NULL);
1.2 paf 251: };
252: /*
253: * Likewise for the table of routine/environment pairs we visit outside of
254: * request context.
255: */
256: if (static_calls_made == NULL) {
1.5 paf 257: static_calls_made = ap_make_table(parser3_pool, 16);
1.2 paf 258: };
259: }
260:
261: /*
262: * This routine is used to add a trace of a callback to the list. We're
263: * passed the server record (if available), the request record (if available),
264: * a pointer to our private configuration record (if available) for the
265: * environment to which the callback is supposed to apply, and some text. We
266: * turn this into a textual representation and add it to the tail of the list.
267: * The list can be displayed by the parser3_handler() routine.
268: *
269: * If the call occurs within a request context (i.e., we're passed a request
270: * record), we put the trace into the request pool and attach it to the
271: * request via the notes mechanism. Otherwise, the trace gets added
272: * to the static (non-request-specific) list.
273: *
274: * Note that the r->notes table is only for storing strings; if you need to
275: * maintain per-request data of any other type, you need to use another
276: * mechanism.
277: */
278:
279: #define TRACE_NOTE "example-trace"
280:
281: static void trace_add(server_rec *s, request_rec *r, excfg *mconfig,
282: const char *note)
283: {
284:
285: const char *sofar;
286: char *addon;
287: char *where;
288: pool *p;
289: const char *trace_copy;
290:
291: /*
292: * Make sure our pools and tables are set up - we need 'em.
293: */
294: setup_module_cells();
295: /*
296: * Now, if we're in request-context, we use the request pool.
297: */
298: if (r != NULL) {
299: p = r->pool;
300: if ((trace_copy = ap_table_get(r->notes, TRACE_NOTE)) == NULL) {
301: trace_copy = "";
302: }
303: }
304: else {
305: /*
306: * We're not in request context, so the trace gets attached to our
307: * module-wide pool. We do the create/destroy every time we're called
308: * in non-request context; this avoids leaking memory in some of
309: * the subsequent calls that allocate memory only once (such as the
310: * key formation below).
311: *
312: * Make a new sub-pool and copy any existing trace to it. Point the
313: * trace cell at the copied value.
314: */
1.5 paf 315: p = ap_make_sub_pool(parser3_pool);
1.2 paf 316: if (trace != NULL) {
317: trace = ap_pstrdup(p, trace);
318: }
319: /*
320: * Now, if we have a sub-pool from before, nuke it and replace with
321: * the one we just allocated.
322: */
1.5 paf 323: if (parser3_subpool != NULL) {
324: ap_destroy_pool(parser3_subpool);
1.2 paf 325: }
1.5 paf 326: parser3_subpool = p;
1.2 paf 327: trace_copy = trace;
328: }
329: /*
330: * If we weren't passed a configuration record, we can't figure out to
331: * what location this call applies. This only happens for co-routines
332: * that don't operate in a particular directory or server context. If we
333: * got a valid record, extract the location (directory or server) to which
334: * it applies.
335: */
336: where = (mconfig != NULL) ? mconfig->loc : "nowhere";
337: where = (where != NULL) ? where : "";
338: /*
339: * Now, if we're not in request context, see if we've been called with
340: * this particular combination before. The table is allocated in the
341: * module's private pool, which doesn't get destroyed.
342: */
343: if (r == NULL) {
344: char *key;
345:
346: key = ap_pstrcat(p, note, ":", where, NULL);
347: if (ap_table_get(static_calls_made, key) != NULL) {
348: /*
349: * Been here, done this.
350: */
351: return;
352: }
353: else {
354: /*
355: * First time for this combination of routine and environment -
356: * log it so we don't do it again.
357: */
358: ap_table_set(static_calls_made, key, "been here");
359: }
360: }
361: addon = ap_pstrcat(p, " <LI>\n", " <DL>\n", " <DT><SAMP>",
362: note, "</SAMP>\n", " </DT>\n", " <DD><SAMP>[",
363: where, "]</SAMP>\n", " </DD>\n", " </DL>\n",
364: " </LI>\n", NULL);
365: sofar = (trace_copy == NULL) ? "" : trace_copy;
366: trace_copy = ap_pstrcat(p, sofar, addon, NULL);
367: if (r != NULL) {
368: ap_table_set(r->notes, TRACE_NOTE, trace_copy);
369: }
370: else {
371: trace = trace_copy;
372: }
373: /*
374: * You *could* change the following if you wanted to see the calling
375: * sequence reported in the server's error_log, but beware - almost all of
376: * these co-routines are called for every single request, and the impact
377: * on the size (and readability) of the error_log is considerable.
378: */
1.5 paf 379: #define parser3_LOG_EACH 0
380: #if parser3_LOG_EACH
1.2 paf 381: if (s != NULL) {
382: ap_log_error(APLOG_MARK, APLOG_DEBUG, s, "mod_example: %s", note);
383: }
384: #endif
385: }
386:
387: /*--------------------------------------------------------------------------*/
388: /* We prototyped the various syntax for command handlers (routines that */
389: /* are called when the configuration parser detects a directive declared */
390: /* by our module) earlier. Now we actually declare a "real" routine that */
391: /* will be invoked by the parser when our "real" directive is */
392: /* encountered. */
393: /* */
394: /* If a command handler encounters a problem processing the directive, it */
395: /* signals this fact by returning a non-NULL pointer to a string */
396: /* describing the problem. */
397: /* */
398: /* The magic return value DECLINE_CMD is used to deal with directives */
399: /* that might be declared by multiple modules. If the command handler */
400: /* returns NULL, the directive was processed; if it returns DECLINE_CMD, */
401: /* the next module (if any) that declares the directive is given a chance */
402: /* at it. If it returns any other value, it's treated as the text of an */
403: /* error message. */
404: /*--------------------------------------------------------------------------*/
405: /*
406: * Command handler for the NO_ARGS "Example" directive. All we do is mark the
407: * call in the trace log, and flag the applicability of the directive to the
408: * current location in that location's configuration record.
409: */
410: static const char *cmd_example(cmd_parms *cmd, void *mconfig)
411: {
412:
413: excfg *cfg = (excfg *) mconfig;
414:
415: /*
416: * "Example Wuz Here"
417: */
418: cfg->local = 1;
419: trace_add(cmd->server, NULL, cfg, "cmd_example()");
420: return NULL;
421: }
422:
423: /*--------------------------------------------------------------------------*/
424: /* */
425: /* Now we declare our content handlers, which are invoked when the server */
426: /* encounters a document which our module is supposed to have a chance to */
427: /* see. (See mod_mime's SetHandler and AddHandler directives, and the */
428: /* mod_info and mod_status examples, for more details.) */
429: /* */
430: /* Since content handlers are dumping data directly into the connexion */
431: /* (using the r*() routines, such as rputs() and rprintf()) without */
432: /* intervention by other parts of the server, they need to make */
433: /* sure any accumulated HTTP headers are sent first. This is done by */
434: /* calling send_http_header(). Otherwise, no header will be sent at all, */
435: /* and the output sent to the client will actually be HTTP-uncompliant. */
436: /*--------------------------------------------------------------------------*/
437: /*
438: * Sample content handler. All this does is display the call list that has
439: * been built up so far.
440: *
441: * The return value instructs the caller concerning what happened and what to
442: * do next:
443: * OK ("we did our thing")
444: * DECLINED ("this isn't something with which we want to get involved")
445: * HTTP_mumble ("an error status should be reported")
446: */
447:
448:
449: // service funcs
450:
1.4 paf 451: const char *get_env(Pool& pool, const char *name) {
452: request_rec *r=static_cast<request_rec *>(pool.info());
453: return (const char *)ap_table_get(r->subprocess_env, name);
454: }
455:
1.5 paf 456: uint read_post(Pool& pool, char *buf, uint max_bytes) {
457: request_rec *r=static_cast<request_rec *>(pool.info());
458:
459: /* ap_log_error(APLOG_MARK, APLOG_DEBUG, r->server,
460: "mod_parser3: read_post(max=%u)", max_bytes);
461: */
462: int retval;
463: if((retval = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR)))
464: return 0;
465: if(!ap_should_client_block(r))
466: return 0;
467:
468: uint total_read_bytes=0;
469: void (*handler)(int)=signal(SIGPIPE, SIG_IGN);
470: while (total_read_bytes<max_bytes) {
471: ap_hard_timeout("Read POST information", r); /* start timeout timer */
472: uint read_bytes=
473: ap_get_client_block(r, buf+total_read_bytes, max_bytes-total_read_bytes);
474: ap_reset_timeout(r);
475: if (read_bytes<=0)
1.2 paf 476: break;
1.5 paf 477: total_read_bytes+=read_bytes;
478: }
479: signal(SIGPIPE, handler);
480: return total_read_bytes;
1.2 paf 481: }
482:
483: void add_header_attribute(Pool& pool, const char *key, const char *value) {
484: request_rec *r=static_cast<request_rec *>(pool.info());
485:
1.3 paf 486: if(strcasecmp(key, "content-type")==0) {
1.2 paf 487: /* r->content_type, *not* r->headers_out("Content-type"). If you don't
488: * set it, it will be filled in with the server's default type (typically
489: * "text/plain"). You *must* also ensure that r->content_type is lower
490: * case.
491: */
492: r->content_type = value;
493: } else
494: ap_table_merge(r->headers_out, key, value);
495: }
496:
497: void send_header(Pool& pool) {
498: request_rec *r=static_cast<request_rec *>(pool.info());
1.5 paf 499:
500: ap_hard_timeout("send header", r);
1.2 paf 501: ap_send_http_header(r);
1.5 paf 502: ap_kill_timeout(r);
1.2 paf 503: }
504:
505: void send_body(Pool& pool, const char *buf, size_t size) {
506: request_rec *r=static_cast<request_rec *>(pool.info());
1.5 paf 507:
508: ap_hard_timeout("send body", r);
1.2 paf 509: ap_rwrite(buf, size, r);
1.5 paf 510: ap_kill_timeout(r);
1.2 paf 511: }
512:
513: ///@todo initSocks();
514: static int parser3_handler(request_rec *r)
515: {
516: Pool pool;
517: pool.set_storage(r->pool);
518: pool.set_info(r);
519:
520: excfg *dcfg;
521:
522: dcfg = our_dconfig(r);
523:
524:
525: /* A flag which modules can set, to indicate that the data being
526: * returned is volatile, and clients should be told not to cache it.
527: */
528: r->no_cache=1;
529:
530: PTRY { // global try
531: const char *filespec_to_process=r->filename;
532:
1.4 paf 533: ap_add_common_vars(r);
534: ap_add_cgi_vars(r);
535:
1.2 paf 536: // Request info
537: Request::Info request_info;
538: const char *document_root=
539: (const char *)ap_table_get(r->subprocess_env, "DOCUMENT_ROOT");
540: if(!document_root) {
541: static char fake_document_root[MAX_STRING];
542: strncpy(fake_document_root, filespec_to_process, MAX_STRING);
543: rsplit(fake_document_root, '/'); rsplit(fake_document_root, '\\');// strip filename
544: document_root=fake_document_root;
545: }
546: request_info.document_root=document_root;
547: request_info.path_translated=filespec_to_process;
548: request_info.method=r->method;
549: request_info.query_string=r->args;
1.4 paf 550: request_info.uri=
551: (const char *)ap_table_get(r->subprocess_env, "REQUEST_URI");
1.5 paf 552: request_info.content_type=
553: (const char *)ap_table_get(r->subprocess_env, "CONTENT_TYPE");
1.2 paf 554: const char *content_length =
555: (const char *)ap_table_get(r->subprocess_env, "CONTENT_LENGTH");
556: request_info.content_length=(content_length?atoi(content_length):0);
1.7 ! paf 557: request_info.cookie=
! 558: (const char *)ap_table_get(r->subprocess_env, "HTTP_COOKIE");
1.2 paf 559:
560: // prepare to process request
561: Request request(pool,
562: request_info,
563: String::UL_HTML_TYPO
564: );
565:
566: /* move this to httpd.conf | .htaccess
567:
568: // some root-controlled location
569: char *sys_auto_path1;
570: #ifdef WIN32
571: // c:\windows
572: sys_auto_path1=(char *)pool.malloc(MAX_STRING);
573: GetWindowsDirectory(sys_auto_path1, MAX_STRING);
574: strcat(sys_auto_path1, PATH_DELIMITER_STRING);
575: #else
576: // ~nobody
1.4 paf 577: sys_auto_path1=zgetenv("HOME");
1.2 paf 578: #endif
579:
580: // beside by binary
581: char *sys_auto_path2=(char *)pool.malloc(MAX_STRING);
582: strncpy(sys_auto_path2, argv[0], MAX_STRING); // filespec of my binary
583: rsplit(sys_auto_path2, '/'); rsplit(sys_auto_path2, '\\');// strip filename
584: strcat(sys_auto_path2, PATH_DELIMITER_STRING);
585:
586: */
587:
588: // process the request
589: request.core(
590: 0/*sys_auto_path1*/,
591: 0/*sys_auto_path2*/,
592: r->header_only!=0);
593: // no actions with request' data past this point
594: // request.exception not not handled here, but all
595: // request' data are associated with it's pool=exception
596:
597: // successful finish
598: } PCATCH(e) { // global problem
599: const char *body=e.comment();
600: int content_length=strlen(body);
601:
602: // prepare header
603: (*service_funcs.add_header_attribute)(pool, "content-type", "text/plain");
604: char content_length_cstr[MAX_NUMBER];
605: snprintf(content_length_cstr, MAX_NUMBER, "%d", content_length);
606: (*service_funcs.add_header_attribute)(pool, "content-length",
607: content_length_cstr);
608:
609: // send header
610: (*service_funcs.send_header)(pool);
611:
612: // send body
613: if(!r->header_only)
614: (*service_funcs.send_body)(pool, body, content_length);
615:
616: // unsuccessful finish
617: }
618: PEND_CATCH
619:
620: /*
621: * We did what we wanted to do, so tell the rest of the server we
622: * succeeded.
623: */
624: return OK;
625: }
626:
627: /*--------------------------------------------------------------------------*/
628: /* */
629: /* Now let's declare routines for each of the callback phase in order. */
630: /* (That's the order in which they're listed in the callback list, *not */
631: /* the order in which the server calls them! See the command_rec */
632: /* declaration near the bottom of this file.) Note that these may be */
633: /* called for situations that don't relate primarily to our function - in */
634: /* other words, the fixup handler shouldn't assume that the request has */
635: /* to do with "example" stuff. */
636: /* */
637: /* With the exception of the content handler, all of our routines will be */
638: /* called for each request, unless an earlier handler from another module */
639: /* aborted the sequence. */
640: /* */
641: /* Handlers that are declared as "int" can return the following: */
642: /* */
643: /* OK Handler accepted the request and did its thing with it. */
644: /* DECLINED Handler took no action. */
645: /* HTTP_mumble Handler looked at request and found it wanting. */
646: /* */
647: /* What the server does after calling a module handler depends upon the */
648: /* handler's return value. In all cases, if the handler returns */
649: /* DECLINED, the server will continue to the next module with an handler */
650: /* for the current phase. However, if the handler return a non-OK, */
651: /* non-DECLINED status, the server aborts the request right there. If */
652: /* the handler returns OK, the server's next action is phase-specific; */
653: /* see the individual handler comments below for details. */
654: /* */
655: /*--------------------------------------------------------------------------*/
656: /*
657: * This function is called during server initialisation. Any information
658: * that needs to be recorded must be in static cells, since there's no
659: * configuration record.
660: *
661: * There is no return value.
662: */
663:
664: /*
665: * All our module-initialiser does is add its trace to the log.
666: */
667: static void parser3_init(server_rec *s, pool *p)
668: {
669: static bool globals_inited=false;
670: if(globals_inited)
671: return;
672: globals_inited=true;
673:
1.6 paf 674: static Pool pool; // global pool
1.2 paf 675: pool.set_storage(p);
676: PTRY {
677: // init global variables
678: globals_init(pool);
679:
680: // Service funcs
1.4 paf 681: service_funcs.get_env=get_env;
1.2 paf 682: service_funcs.read_post=read_post;
683: service_funcs.add_header_attribute=add_header_attribute;
684: service_funcs.send_header=send_header;
685: service_funcs.send_body=send_body;
686:
687: //...
688: } PCATCH(e) { // global problem
689: const char *body=e.comment();
690: // somehow report that error
691: }
692: PEND_CATCH
693: }
694:
695: /*
696: * This function is called when an heavy-weight process (such as a child) is
697: * being run down or destroyed. As with the child-initialisation function,
698: * any information that needs to be recorded must be in static cells, since
699: * there's no configuration record.
700: *
701: * There is no return value.
702: */
703:
704: /*
705: * All our process-death routine does is add its trace to the log.
706: */
1.5 paf 707: static void parser3_child_exit(server_rec *s, pool *p)
1.2 paf 708: {
709:
710: char *note;
711: char *sname = s->server_hostname;
712:
713: /*
714: * The arbitrary text we add to our trace entry indicates for which server
715: * we're being called.
716: */
717: sname = (sname != NULL) ? sname : "";
1.5 paf 718: note = ap_pstrcat(p, "parser3_child_exit(", sname, ")", NULL);
1.2 paf 719: trace_add(s, NULL, NULL, note);
720: }
721:
722: /*
723: * This function gets called to create a per-directory configuration
724: * record. This will be called for the "default" server environment, and for
725: * each directory for which the parser finds any of our directives applicable.
726: * If a directory doesn't have any of our directives involved (i.e., they
727: * aren't in the .htaccess file, or a <Location>, <Directory>, or related
728: * block), this routine will *not* be called - the configuration for the
729: * closest ancestor is used.
730: *
731: * The return value is a pointer to the created module-specific
732: * structure.
733: */
1.5 paf 734: static void *parser3_create_dir_config(pool *p, char *dirspec)
1.2 paf 735: {
736:
737: excfg *cfg;
738: char *dname = dirspec;
739:
740: /*
741: * Allocate the space for our record from the pool supplied.
742: */
743: cfg = (excfg *) ap_pcalloc(p, sizeof(excfg));
744: /*
745: * Now fill in the defaults. If there are any `parent' configuration
746: * records, they'll get merged as part of a separate callback.
747: */
748: cfg->local = 0;
749: cfg->congenital = 0;
750: cfg->cmode = CONFIG_MODE_DIRECTORY;
751: /*
752: * Finally, add our trace to the callback list.
753: */
754: dname = (dname != NULL) ? dname : "";
755: cfg->loc = ap_pstrcat(p, "DIR(", dname, ")", NULL);
1.5 paf 756: trace_add(NULL, NULL, cfg, "parser3_create_dir_config()");
1.2 paf 757: return (void *) cfg;
758: }
759:
760: /*
761: * This function gets called to merge two per-directory configuration
762: * records. This is typically done to cope with things like .htaccess files
763: * or <Location> directives for directories that are beneath one for which a
764: * configuration record was already created. The routine has the
765: * responsibility of creating a new record and merging the contents of the
766: * other two into it appropriately. If the module doesn't declare a merge
767: * routine, the record for the closest ancestor location (that has one) is
768: * used exclusively.
769: *
770: * The routine MUST NOT modify any of its arguments!
771: *
772: * The return value is a pointer to the created module-specific structure
773: * containing the merged values.
774: */
1.5 paf 775: static void *parser3_merge_dir_config(pool *p, void *parent_conf,
1.2 paf 776: void *newloc_conf)
777: {
778:
779: excfg *merged_config = (excfg *) ap_pcalloc(p, sizeof(excfg));
780: excfg *pconf = (excfg *) parent_conf;
781: excfg *nconf = (excfg *) newloc_conf;
782: char *note;
783:
784: /*
785: * Some things get copied directly from the more-specific record, rather
786: * than getting merged.
787: */
788: merged_config->local = nconf->local;
789: merged_config->loc = ap_pstrdup(p, nconf->loc);
790: /*
791: * Others, like the setting of the `congenital' flag, get ORed in. The
792: * setting of that particular flag, for instance, is TRUE if it was ever
793: * true anywhere in the upstream configuration.
794: */
795: merged_config->congenital = (pconf->congenital | pconf->local);
796: /*
797: * If we're merging records for two different types of environment (server
798: * and directory), mark the new record appropriately. Otherwise, inherit
799: * the current value.
800: */
801: merged_config->cmode =
802: (pconf->cmode == nconf->cmode) ? pconf->cmode : CONFIG_MODE_COMBO;
803: /*
804: * Now just record our being called in the trace list. Include the
805: * locations we were asked to merge.
806: */
1.5 paf 807: note = ap_pstrcat(p, "parser3_merge_dir_config(\"", pconf->loc, "\",\"",
1.2 paf 808: nconf->loc, "\")", NULL);
809: trace_add(NULL, NULL, merged_config, note);
810: return (void *) merged_config;
811: }
812:
813: /*
814: * This function gets called to create a per-server configuration
815: * record. It will always be called for the "default" server.
816: *
817: * The return value is a pointer to the created module-specific
818: * structure.
819: */
1.5 paf 820: static void *parser3_create_server_config(pool *p, server_rec *s)
1.2 paf 821: {
822:
823: excfg *cfg;
824: char *sname = s->server_hostname;
825:
826: /*
1.5 paf 827: * As with the parser3_create_dir_config() reoutine, we allocate and fill
1.2 paf 828: * in an empty record.
829: */
830: cfg = (excfg *) ap_pcalloc(p, sizeof(excfg));
831: cfg->local = 0;
832: cfg->congenital = 0;
833: cfg->cmode = CONFIG_MODE_SERVER;
834: /*
835: * Note that we were called in the trace list.
836: */
837: sname = (sname != NULL) ? sname : "";
838: cfg->loc = ap_pstrcat(p, "SVR(", sname, ")", NULL);
1.5 paf 839: trace_add(s, NULL, cfg, "parser3_create_server_config()");
1.2 paf 840: return (void *) cfg;
841: }
842:
843: /*
844: * This function gets called to merge two per-server configuration
845: * records. This is typically done to cope with things like virtual hosts and
846: * the default server configuration The routine has the responsibility of
847: * creating a new record and merging the contents of the other two into it
848: * appropriately. If the module doesn't declare a merge routine, the more
849: * specific existing record is used exclusively.
850: *
851: * The routine MUST NOT modify any of its arguments!
852: *
853: * The return value is a pointer to the created module-specific structure
854: * containing the merged values.
855: */
1.5 paf 856: static void *parser3_merge_server_config(pool *p, void *server1_conf,
1.2 paf 857: void *server2_conf)
858: {
859:
860: excfg *merged_config = (excfg *) ap_pcalloc(p, sizeof(excfg));
861: excfg *s1conf = (excfg *) server1_conf;
862: excfg *s2conf = (excfg *) server2_conf;
863: char *note;
864:
865: /*
866: * Our inheritance rules are our own, and part of our module's semantics.
867: * Basically, just note whence we came.
868: */
869: merged_config->cmode =
870: (s1conf->cmode == s2conf->cmode) ? s1conf->cmode : CONFIG_MODE_COMBO;
871: merged_config->local = s2conf->local;
872: merged_config->congenital = (s1conf->congenital | s1conf->local);
873: merged_config->loc = ap_pstrdup(p, s2conf->loc);
874: /*
875: * Trace our call, including what we were asked to merge.
876: */
1.5 paf 877: note = ap_pstrcat(p, "parser3_merge_server_config(\"", s1conf->loc, "\",\"",
1.2 paf 878: s2conf->loc, "\")", NULL);
879: trace_add(NULL, NULL, merged_config, note);
880: return (void *) merged_config;
881: }
882:
883: /*
884: * This routine gives our module an opportunity to translate the URI into an
885: * actual filename. If we don't do anything special, the server's default
886: * rules (Alias directives and the like) will continue to be followed.
887: *
888: * The return value is OK, DECLINED, or HTTP_mumble. If we return OK, no
889: * further modules are called for this phase.
890: */
1.5 paf 891: static int parser3_translate_handler(request_rec *r)
1.2 paf 892: {
893:
894: excfg *cfg;
895:
896: cfg = our_dconfig(r);
897: /*
898: * We don't actually *do* anything here, except note the fact that we were
899: * called.
900: */
1.5 paf 901: trace_add(r->server, r, cfg, "parser3_translate_handler()");
1.2 paf 902: return DECLINED;
903: }
904:
905: /*
906: * This routine is called to check the authentication information sent with
907: * the request (such as looking up the user in a database and verifying that
908: * the [encrypted] password sent matches the one in the database).
909: *
910: * The return value is OK, DECLINED, or some HTTP_mumble error (typically
911: * HTTP_UNAUTHORIZED). If we return OK, no other modules are given a chance
912: * at the request during this phase.
913: */
1.5 paf 914: static int parser3_check_user_id(request_rec *r)
1.2 paf 915: {
916:
917: excfg *cfg;
918:
919: cfg = our_dconfig(r);
920: /*
921: * Don't do anything except log the call.
922: */
1.5 paf 923: trace_add(r->server, r, cfg, "parser3_check_user_id()");
1.2 paf 924: return DECLINED;
925: }
926:
927: /*
928: * This routine is called to check to see if the resource being requested
929: * requires authorisation.
930: *
931: * The return value is OK, DECLINED, or HTTP_mumble. If we return OK, no
932: * other modules are called during this phase.
933: *
934: * If *all* modules return DECLINED, the request is aborted with a server
935: * error.
936: */
1.5 paf 937: static int parser3_auth_checker(request_rec *r)
1.2 paf 938: {
939:
940: excfg *cfg;
941:
942: cfg = our_dconfig(r);
943: /*
944: * Log the call and return OK, or access will be denied (even though we
945: * didn't actually do anything).
946: */
1.5 paf 947: trace_add(r->server, r, cfg, "parser3_auth_checker()");
1.2 paf 948: return DECLINED;
949: }
950:
951: /*
952: * This routine is called to check for any module-specific restrictions placed
953: * upon the requested resource. (See the mod_access module for an example.)
954: *
955: * The return value is OK, DECLINED, or HTTP_mumble. All modules with an
956: * handler for this phase are called regardless of whether their predecessors
957: * return OK or DECLINED. The first one to return any other status, however,
958: * will abort the sequence (and the request) as usual.
959: */
1.5 paf 960: static int parser3_access_checker(request_rec *r)
1.2 paf 961: {
962:
963: excfg *cfg;
964:
965: cfg = our_dconfig(r);
1.5 paf 966: trace_add(r->server, r, cfg, "parser3_access_checker()");
1.2 paf 967: return DECLINED;
968: }
969:
970: /*
971: * This routine is called to perform any module-specific logging activities
972: * over and above the normal server things.
973: *
974: * The return value is OK, DECLINED, or HTTP_mumble. If we return OK, any
975: * remaining modules with an handler for this phase will still be called.
976: */
1.5 paf 977: static int parser3_logger(request_rec *r)
1.2 paf 978: {
979:
980: excfg *cfg;
981:
982: cfg = our_dconfig(r);
1.5 paf 983: trace_add(r->server, r, cfg, "parser3_logger()");
1.2 paf 984: return DECLINED;
985: }
986:
987:
988: /*--------------------------------------------------------------------------*/
989: /* */
990: /* All of the routines have been declared now. Here's the list of */
991: /* directives specific to our module, and information about where they */
992: /* may appear and how the command parser should pass them to us for */
993: /* processing. Note that care must be taken to ensure that there are NO */
994: /* collisions of directive names between modules. */
995: /* */
996: /*--------------------------------------------------------------------------*/
997: /*
998: * List of directives specific to our module.
999: */
1.5 paf 1000: static const command_rec parser3_cmds[] =
1.2 paf 1001: {
1002: {
1003: "Example", /* directive name */
1004: (const char *(*)(void))((void *)cmd_example), /* config action routine */
1005: NULL, /* argument to include in call */
1006: (int)OR_OPTIONS, /* where available */
1007: NO_ARGS, /* arguments */
1008: "Example directive - no arguments"
1009: /* directive description */
1010: },
1011: {NULL}
1012: };
1013:
1014: /*--------------------------------------------------------------------------*/
1015: /* */
1016: /* Now the list of content handlers available from this module. */
1017: /* */
1018: /*--------------------------------------------------------------------------*/
1019: /*
1020: * List of content handlers our module supplies. Each handler is defined by
1021: * two parts: a name by which it can be referenced (such as by
1022: * {Add,Set}Handler), and the actual routine name. The list is terminated by
1023: * a NULL block, since it can be of variable length.
1024: *
1025: * Note that content-handlers are invoked on a most-specific to least-specific
1026: * basis; that is, a handler that is declared for "text/plain" will be
1027: * invoked before one that was declared for "text / *". Note also that
1028: * if a content-handler returns anything except DECLINED, no other
1029: * content-handlers will be called.
1030: */
1031: static const handler_rec parser3_handlers[] =
1032: {
1033: {"parser3-handler", parser3_handler},
1034: {NULL}
1035: };
1036:
1037: /*--------------------------------------------------------------------------*/
1038: /* */
1039: /* Finally, the list of callback routines and data structures that */
1040: /* provide the hooks into our module from the other parts of the server. */
1041: /* */
1042: /*--------------------------------------------------------------------------*/
1043: /*
1044: * Module definition for configuration. If a particular callback is not
1045: * needed, replace its routine name below with the word NULL.
1046: *
1047: * The number in brackets indicates the order in which the routine is called
1048: * during request processing. Note that not all routines are necessarily
1049: * called (such as if a resource doesn't have access restrictions).
1050: */
1051: module MODULE_VAR_EXPORT parser3_module =
1052: {
1053: STANDARD_MODULE_STUFF,
1054: parser3_init, /* module initializer */
1.5 paf 1055: parser3_create_dir_config, /* per-directory config creator */
1056: parser3_merge_dir_config, /* dir config merger */
1057: parser3_create_server_config, /* server config creator */
1058: parser3_merge_server_config, /* server config merger */
1059: parser3_cmds, /* command table */
1.2 paf 1060: parser3_handlers, /* [9] list of handlers */
1.5 paf 1061: parser3_translate_handler, /* [2] filename-to-URI translation */
1062: parser3_check_user_id, /* [5] check/validate user_id */
1063: parser3_auth_checker, /* [6] check user_id is valid *here* */
1064: parser3_access_checker, /* [4] check access by host address */
1065: 0, /* [7] MIME type checker/setter */
1066: 0, /* [8] fixups */
1067: parser3_logger /* [10] logger */
1.2 paf 1068: #if MODULE_MAGIC_NUMBER >= 19970103
1.5 paf 1069: ,0 /* [3] header parser */
1.2 paf 1070: #endif
1071: #if MODULE_MAGIC_NUMBER >= 19970719
1.7 ! paf 1072: ,0 /* process initializer */
1.2 paf 1073: #endif
1074: #if MODULE_MAGIC_NUMBER >= 19970728
1.5 paf 1075: ,parser3_child_exit /* process exit/cleanup */
1.2 paf 1076: #endif
1077: #if MODULE_MAGIC_NUMBER >= 19970902
1.5 paf 1078: ,0 /* [1] post read_request handling */
1.2 paf 1079: #endif
1080: };
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