Annotation of libwww/Library/src/HTAccess.c, revision 1.17
1.1 timbl 1: /* Access Manager HTAccess.c
2: ** ==============
3: **
4: ** Authors
5: ** TBL Tim Berners-Lee timbl@info.cern.ch
1.4 timbl 6: ** JFG Jean-Francois Groff jfg@dxcern.cern.ch
1.1 timbl 7: ** DD Denis DeLaRoca (310) 825-4580 <CSP1DWD@mvs.oac.ucla.edu>
8: ** History
9: ** 8 Jun 92 Telnet hopping prohibited as telnet is not secure TBL
10: ** 26 Jun 92 When over DECnet, suppressed FTP, Gopher and News. JFG
11: ** 6 Oct 92 Moved HTClientHost and logfile into here. TBL
12: ** 17 Dec 92 Tn3270 added, bug fix. DD
1.2 timbl 13: ** 4 Feb 93 Access registration, Search escapes bad chars TBL
1.9 timbl 14: ** PARAMETERS TO HTSEARCH AND HTLOADRELATIVE CHANGED
15: ** 28 May 93 WAIS gateway explicit if no WAIS library linked in.
1.2 timbl 16: **
17: ** Bugs
18: ** This module assumes that that the graphic object is hypertext, as it
1.9 timbl 19: ** needs to select it when it has been loaded. A superclass needs to be
1.2 timbl 20: ** defined which accepts select and select_anchor.
1.1 timbl 21: */
22:
1.9 timbl 23: #ifndef DEFAULT_WAIS_GATEWAY
1.8 timbl 24: #define DEFAULT_WAIS_GATEWAY "http://info.cern.ch:8001/"
1.9 timbl 25: #endif
1.8 timbl 26:
1.1 timbl 27: /* Implements:
28: */
29: #include "HTAccess.h"
30:
31: /* Uses:
32: */
33:
34: #include "HTParse.h"
35: #include "HTUtils.h"
1.4 timbl 36: #include "HTML.h" /* SCW */
1.2 timbl 37:
38: #ifndef NO_RULES
39: #include "HTRules.h"
40: #endif
41:
1.1 timbl 42: #include <stdio.h>
43:
1.2 timbl 44: #include "HTList.h"
45: #include "HText.h" /* See bugs above */
46: #include "HTAlert.h"
1.17 ! timbl 47: #include "HTFWriter.h" /* for cache stuff */
! 48: #include "HTTee.h"
1.2 timbl 49:
1.1 timbl 50: /* These flags may be set to modify the operation of this module
51: */
52: PUBLIC char * HTClientHost = 0; /* Name of remote login host if any */
53: PUBLIC FILE * logfile = 0; /* File to which to output one-liners */
1.12 timbl 54: PUBLIC BOOL HTSecure = NO; /* Disable access for telnet users? */
1.1 timbl 55:
1.2 timbl 56: /* To generate other things, play with these:
57: */
58:
1.15 timbl 59: /* PUBLIC HTFormat HTOutputFormat = NULL; use request->output_format */
60: /* PUBLIC HTStream* HTOutputStream = NULL; use request->output_stream */
1.1 timbl 61:
62: PRIVATE HTList * protocols = NULL; /* List of registered protocol descriptors */
63:
64:
1.15 timbl 65: /* Create a request structure
66: ** ---------------------------
67: */
68:
69: PUBLIC HTRequest * HTRequest_new NOARGS
70: {
71: HTRequest * me = (HTRequest*) calloc(sizeof(*me), 1); /* zero fill */
72: if (!me) outofmem(__FILE__, "HTRequest_new()");
73:
74: me->output_format = WWW_PRESENT; /* default it to present to user */
1.16 timbl 75: me->conversions = HTList_new(); /* No conversions registerd yet */
1.15 timbl 76: return me;
77: }
78:
79:
1.1 timbl 80: /* Register a Protocol HTRegisterProtocol
81: ** -------------------
82: */
83:
84: PUBLIC BOOL HTRegisterProtocol(protocol)
85: HTProtocol * protocol;
86: {
87: if (!protocols) protocols = HTList_new();
88: HTList_addObject(protocols, protocol);
89: return YES;
90: }
91:
92:
93: /* Register all known protocols
94: ** ----------------------------
95: **
96: ** Add to or subtract from this list if you add or remove protocol modules.
97: ** This routine is called the first time the protocol list is needed,
98: ** unless any protocols are already registered, in which case it is not called.
99: ** Therefore the application can override this list.
100: **
101: ** Compiling with NO_INIT prevents all known protocols from being forced
102: ** in at link time.
103: */
104: #ifndef NO_INIT
105: PRIVATE void HTAccessInit NOARGS /* Call me once */
106: {
1.14 duns 107: GLOBALREF HTProtocol HTTP, HTFile, HTTelnet, HTTn3270, HTRlogin;
1.1 timbl 108: #ifndef DECNET
1.14 duns 109: GLOBALREF HTProtocol HTFTP, HTNews, HTGopher;
1.3 timbl 110: #ifdef DIRECT_WAIS
1.14 duns 111: GLOBALREF HTProtocol HTWAIS;
1.3 timbl 112: #endif
1.2 timbl 113: HTRegisterProtocol(&HTFTP);
114: HTRegisterProtocol(&HTNews);
115: HTRegisterProtocol(&HTGopher);
1.3 timbl 116: #ifdef DIRECT_WAIS
117: HTRegisterProtocol(&HTWAIS);
118: #endif
1.1 timbl 119: #endif
120:
1.2 timbl 121: HTRegisterProtocol(&HTTP);
122: HTRegisterProtocol(&HTFile);
123: HTRegisterProtocol(&HTTelnet);
124: HTRegisterProtocol(&HTTn3270);
125: HTRegisterProtocol(&HTRlogin);
1.1 timbl 126: }
127: #endif
128:
129:
1.2 timbl 130: /* Find physical name and access protocol
131: ** --------------------------------------
1.1 timbl 132: **
133: **
134: ** On entry,
135: ** addr must point to the fully qualified hypertext reference.
136: ** anchor a pareent anchor with whose address is addr
137: **
138: ** On exit,
1.2 timbl 139: ** returns HT_NO_ACCESS Error has occured.
140: ** HT_OK Success
1.1 timbl 141: **
142: */
1.2 timbl 143: PRIVATE int get_physical ARGS2(
144: CONST char *, addr,
145: HTParentAnchor *, anchor)
1.1 timbl 146: {
147: char * access=0; /* Name of access method */
1.2 timbl 148: char * physical = 0;
1.1 timbl 149:
1.2 timbl 150: #ifndef NO_RULES
151: physical = HTTranslate(addr);
152: if (!physical) {
153: return HT_FORBIDDEN;
154: }
155: HTAnchor_setPhysical(anchor, physical);
156: free(physical); /* free our copy */
157: #else
158: HTAnchor_setPhysical(anchor, addr);
159: #endif
160:
161: access = HTParse(HTAnchor_physical(anchor),
162: "file:", PARSE_ACCESS);
1.1 timbl 163:
164: /* Check whether gateway access has been set up for this
1.8 timbl 165: **
166: ** This function can be replaced by the rule system above.
1.1 timbl 167: */
1.8 timbl 168: #define USE_GATEWAYS
1.1 timbl 169: #ifdef USE_GATEWAYS
1.2 timbl 170: {
1.9 timbl 171: char * gateway_parameter, *gateway;
1.2 timbl 172: gateway_parameter = (char *)malloc(strlen(access)+20);
173: if (gateway_parameter == NULL) outofmem(__FILE__, "HTLoad");
174: strcpy(gateway_parameter, "WWW_");
175: strcat(gateway_parameter, access);
176: strcat(gateway_parameter, "_GATEWAY");
177: gateway = (char *)getenv(gateway_parameter); /* coerce for decstation */
178: free(gateway_parameter);
1.8 timbl 179:
180: #ifndef DIRECT_WAIS
1.9 timbl 181: if (!gateway && 0==strcmp(access, "wais")) {
1.8 timbl 182: gateway = DEFAULT_WAIS_GATEWAY;
183: }
184: #endif
1.2 timbl 185: if (gateway) {
1.9 timbl 186: char * path = HTParse(addr, "",
187: PARSE_HOST + PARSE_PATH + PARSE_PUNCTUATION);
188: /* Chop leading / off to make host into part of path */
189: char * gatewayed = HTParse(path+1, gateway, PARSE_ALL);
190: free(path);
1.8 timbl 191: HTAnchor_setPhysical(anchor, gatewayed);
1.9 timbl 192: free(gatewayed);
1.2 timbl 193: free(access);
1.9 timbl 194:
1.8 timbl 195: access = HTParse(HTAnchor_physical(anchor),
196: "http:", PARSE_ACCESS);
1.2 timbl 197: }
198: }
1.1 timbl 199: #endif
200:
201:
202:
203: /* Search registered protocols to find suitable one
204: */
205: {
206: int i, n;
207: #ifndef NO_INIT
1.2 timbl 208: if (!protocols) HTAccessInit();
1.1 timbl 209: #endif
210: n = HTList_count(protocols);
211: for (i=0; i<n; i++) {
1.2 timbl 212: HTProtocol *p = HTList_objectAt(protocols, i);
213: if (strcmp(p->name, access)==0) {
214: HTAnchor_setProtocol(anchor, p);
215: free(access);
216: return (HT_OK);
1.1 timbl 217: }
218: }
219: }
220:
221: free(access);
1.2 timbl 222: return HT_NO_ACCESS;
1.1 timbl 223: }
224:
225:
226: /* Load a document
227: ** ---------------
228: **
1.2 timbl 229: ** This is an internal routine, which has an address AND a matching
230: ** anchor. (The public routines are called with one OR the other.)
231: **
232: ** On entry,
233: ** addr must point to the fully qualified hypertext reference.
1.15 timbl 234: ** request->
235: ** anchor a parent anchor with whose address is addr
236: ** output_format valid
237: ** output_stream valid on NULL
1.2 timbl 238: **
239: ** On exit,
240: ** returns <0 Error has occured.
241: ** HT_LOADED Success
242: ** HT_NO_DATA Success, but no document loaded.
1.8 timbl 243: ** (telnet sesssion started etc)
1.2 timbl 244: **
245: */
1.15 timbl 246: PRIVATE int HTLoad ARGS2(
1.2 timbl 247: CONST char *, addr,
1.15 timbl 248: HTRequest *, request)
1.2 timbl 249: {
250: HTProtocol* p;
1.15 timbl 251: int status = get_physical(addr, request->anchor);
1.2 timbl 252: if (status == HT_FORBIDDEN) {
1.15 timbl 253: return HTLoadError(request->output_stream, 500,
254: "Access forbidden by rule");
1.2 timbl 255: }
256: if (status < 0) return status; /* Can't resolve or forbidden */
257:
1.15 timbl 258: p = HTAnchor_protocol(request->anchor);
1.17 ! timbl 259: return (*(p->load))(request);
1.2 timbl 260: }
261:
262:
263: /* Get a save stream for a document
264: ** --------------------------------
265: */
1.15 timbl 266: PUBLIC HTStream *HTSaveStream ARGS2(
267: HTParentAnchor *, anchor,
268: HTRequest *, request)
269: {
270: HTProtocol * p;
271: request->anchor = anchor;
272: p = HTAnchor_protocol(request->anchor);
1.2 timbl 273: if (!p) return NULL;
274:
1.15 timbl 275: return (*p->saveStream)(request);
1.2 timbl 276:
277: }
278:
279:
280: /* Load a document - with logging etc
281: ** ----------------------------------
282: **
283: ** - Checks or documents already loaded
284: ** - Logs the access
285: ** - Allows stdin filter option
286: ** - Trace ouput and error messages
287: **
1.1 timbl 288: ** On Entry,
289: ** full_address The address of the document to be accessed.
1.2 timbl 290: ** filter if YES, treat stdin as HTML
1.1 timbl 291: **
1.15 timbl 292: ** request->anchor is the node_anchor for the document
293: ** request->output_format is valid
294: **
1.1 timbl 295: ** On Exit,
296: ** returns YES Success in opening document
297: ** NO Failure
298: **
299: */
300:
1.15 timbl 301: PRIVATE BOOL HTLoadDocument ARGS2(
1.2 timbl 302: CONST char *, full_address,
1.15 timbl 303: HTRequest *, request)
1.1 timbl 304:
305: {
306: int status;
307: HText * text;
308:
309: if (TRACE) fprintf (stderr,
310: "HTAccess: loading document %s\n", full_address);
311:
1.15 timbl 312: if (!request->output_format) request->output_format = WWW_PRESENT;
313:
314: if (text=(HText *)HTAnchor_document(request->anchor))
315: { /* Already loaded */
1.1 timbl 316: if (TRACE) fprintf(stderr, "HTAccess: Document already in memory.\n");
317: HText_select(text);
318: return YES;
319: }
1.17 ! timbl 320:
! 321: /* Check the Cache
! 322: */
! 323: /* Bug: for each format, we only check whether it is ok, we
! 324: don't check them all and chose the best */
! 325: if (request->anchor->cacheItems) {
! 326: HTList * list = request->anchor->cacheItems;
! 327: int i;
! 328: int n = HTList_count(list);
! 329: for(i=0; i<n; i++) {
! 330: HTCacheItem * item = HTList_objectAt(list, i);
! 331: HTStream * s = HTStreamStack(item->format, request);
! 332: if (s) { /* format was suitable */
! 333: FILE * fp = fopen(item->filename, "r");
! 334: if (TRACE) fprintf(stderr, "Cache hit for %s\n",
! 335: full_address);
! 336: if (fp) {
! 337: HTFileCopy(fp, s);
! 338: fclose(fp);
! 339: return YES;
! 340: } else {
! 341: fprintf(stderr, "***** Can't read cache file %s !\n",
! 342: item->filename);
! 343: } /* file open ok */
! 344: } /* stream ok */
! 345: } /* next cache item */
! 346: } /* if cache available for this anchor */
1.1 timbl 347:
1.15 timbl 348: status = HTLoad(full_address, request);
1.2 timbl 349:
350:
1.1 timbl 351: /* Log the access if necessary
352: */
353: if (logfile) {
354: time_t theTime;
355: time(&theTime);
356: fprintf(logfile, "%24.24s %s %s %s\n",
357: ctime(&theTime),
358: HTClientHost ? HTClientHost : "local",
359: status<0 ? "FAIL" : "GET",
360: full_address);
361: fflush(logfile); /* Actually update it on disk */
362: if (TRACE) fprintf(stderr, "Log: %24.24s %s %s %s\n",
363: ctime(&theTime),
364: HTClientHost ? HTClientHost : "local",
365: status<0 ? "FAIL" : "GET",
366: full_address);
367: }
368:
369:
370: if (status == HT_LOADED) {
371: if (TRACE) {
372: fprintf(stderr, "HTAccess: `%s' has been accessed.\n",
373: full_address);
374: }
375: return YES;
376: }
377:
378: if (status == HT_NO_DATA) {
379: if (TRACE) {
380: fprintf(stderr,
381: "HTAccess: `%s' has been accessed, No data left.\n",
382: full_address);
383: }
384: return NO;
385: }
386:
1.2 timbl 387: if (status<0) { /* Failure in accessing a document */
1.1 timbl 388: #ifdef CURSES
389: user_message("Can't access `%s'", full_address);
390: #else
1.5 timbl 391: if (TRACE) fprintf(stderr,
392: "HTAccess: Can't access `%s'\n", full_address);
1.1 timbl 393: #endif
1.15 timbl 394: HTLoadError(request->output_stream, 500, "Unable to access document.");
1.1 timbl 395: return NO;
396: }
1.9 timbl 397:
398: /* If you get this, then please find which routine is returning
399: a positive unrecognised error code! */
400:
1.1 timbl 401: fprintf(stderr,
1.2 timbl 402: "**** HTAccess: socket or file number returned by obsolete load routine!\n");
1.9 timbl 403: fprintf(stderr,
404: "**** HTAccess: Internal software error. Please mail www-bug@info.cern.ch!\n");
1.1 timbl 405: exit(-6996);
406:
1.2 timbl 407: } /* HTLoadDocument */
1.1 timbl 408:
409:
410:
411: /* Load a document from absolute name
412: ** ---------------
413: **
414: ** On Entry,
415: ** addr The absolute address of the document to be accessed.
416: ** filter if YES, treat document as HTML
417: **
418: ** On Exit,
419: ** returns YES Success in opening document
420: ** NO Failure
421: **
422: **
423: */
424:
1.15 timbl 425: PUBLIC BOOL HTLoadAbsolute ARGS2(CONST char *,addr, HTRequest*, request)
1.2 timbl 426: {
1.15 timbl 427: request->anchor = HTAnchor_parent(HTAnchor_findAddress(addr));
428:
429: return HTLoadDocument( addr, request);
1.2 timbl 430: }
431:
432:
433: /* Load a document from absolute name to stream
434: ** --------------------------------------------
435: **
436: ** On Entry,
437: ** addr The absolute address of the document to be accessed.
1.15 timbl 438: ** request->output_stream if non-NULL, send data down this stream
1.2 timbl 439: **
440: ** On Exit,
441: ** returns YES Success in opening document
442: ** NO Failure
443: **
444: **
445: */
446:
447: PUBLIC BOOL HTLoadToStream ARGS3(
448: CONST char *, addr,
449: BOOL, filter,
1.15 timbl 450: HTRequest*, request)
1.1 timbl 451: {
1.15 timbl 452: request->output_stream = request->output_stream;
453: request->anchor = HTAnchor_parent(HTAnchor_findAddress(addr));
454: return HTLoadDocument(addr, request);
1.1 timbl 455: }
456:
457:
1.2 timbl 458:
459:
1.1 timbl 460: /* Load a document from relative name
461: ** ---------------
462: **
463: ** On Entry,
1.2 timbl 464: ** relative_name The relative address of the document
465: ** to be accessed.
1.1 timbl 466: **
467: ** On Exit,
468: ** returns YES Success in opening document
469: ** NO Failure
470: **
471: **
472: */
473:
1.15 timbl 474: PUBLIC BOOL HTLoadRelative ARGS3(
1.2 timbl 475: CONST char *, relative_name,
1.15 timbl 476: HTParentAnchor *, here,
477: HTRequest*, request)
1.1 timbl 478: {
479: char * full_address = 0;
480: BOOL result;
481: char * mycopy = 0;
482: char * stripped = 0;
483: char * current_address =
1.2 timbl 484: HTAnchor_address((HTAnchor*)here);
1.1 timbl 485:
486: StrAllocCopy(mycopy, relative_name);
487:
488: stripped = HTStrip(mycopy);
489: full_address = HTParse(stripped,
490: current_address,
491: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.15 timbl 492: result = HTLoadAbsolute(full_address, request);
1.1 timbl 493: free(full_address);
494: free(current_address);
495: free(mycopy); /* Memory leak fixed 10/7/92 -- JFG */
496: return result;
497: }
498:
499:
500: /* Load if necessary, and select an anchor
501: ** --------------------------------------
502: **
503: ** On Entry,
504: ** destination The child or parenet anchor to be loaded.
505: **
506: ** On Exit,
507: ** returns YES Success
508: ** NO Failure
509: **
510: */
511:
1.15 timbl 512: PUBLIC BOOL HTLoadAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1.1 timbl 513: {
514: BOOL loaded = NO;
1.15 timbl 515: if (!anchor) return NO; /* No link */
1.1 timbl 516:
1.15 timbl 517: request->anchor = HTAnchor_parent(anchor);
1.1 timbl 518:
1.15 timbl 519: if (HTAnchor_document(request->anchor) == NULL) {/* If not alread loaded */
1.1 timbl 520: BOOL result;
1.15 timbl 521: char * address = HTAnchor_address((HTAnchor*) request->anchor);
522: result = HTLoadDocument(address, request);
1.1 timbl 523: free(address);
524: if (!result) return NO;
525: loaded = YES;
526: }
527:
528: {
1.15 timbl 529: HText *text = (HText*)HTAnchor_document(request->anchor);
530: if (anchor != (HTAnchor *)request->anchor) { /* If child anchor */
1.1 timbl 531: HText_selectAnchor(text,
1.15 timbl 532: (HTChildAnchor*)anchor); /* Double display? @@ */
1.1 timbl 533: } else {
534: if (!loaded) HText_select(text);
535: }
536: }
537: return YES;
538:
539: } /* HTLoadAnchor */
540:
541:
542: /* Search
543: ** ------
544: ** Performs a keyword search on word given by the user. Adds the keyword to
545: ** the end of the current address and attempts to open the new address.
546: **
547: ** On Entry,
548: ** *keywords space-separated keyword list or similar search list
1.2 timbl 549: ** here is anchor search is to be done on.
1.1 timbl 550: */
551:
1.2 timbl 552: PRIVATE char hex(i)
553: int i;
554: {
1.13 timbl 555: char * hexchars = "0123456789ABCDEF";
556: return hexchars[i];
1.2 timbl 557: }
1.1 timbl 558:
1.15 timbl 559: PUBLIC BOOL HTSearch ARGS3(
1.2 timbl 560: CONST char *, keywords,
1.15 timbl 561: HTParentAnchor *, here,
562: HTRequest *, request)
1.1 timbl 563: {
1.2 timbl 564:
565: #define acceptable \
566: "1234567890abcdefghijlkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_"
567:
568: char *q, *u;
569: CONST char * p, *s, *e; /* Pointers into keywords */
570: char * address = HTAnchor_address((HTAnchor*)here);
1.1 timbl 571: BOOL result;
1.2 timbl 572: char * escaped = malloc(strlen(keywords)*3+1);
573:
574: static CONST BOOL isAcceptable[96] =
575:
576: /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
577: { 0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0, /* 2x !"#$%&'()*+,-./ */
578: 1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0, /* 3x 0123456789:;<=>? */
579: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 4x @ABCDEFGHIJKLMNO */
580: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1, /* 5X PQRSTUVWXYZ[\]^_ */
581: 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 6x `abcdefghijklmno */
582: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0 }; /* 7X pqrstuvwxyz{\}~ DEL */
583:
584: if (escaped == NULL) outofmem(__FILE__, "HTSearch");
585:
586:
587: /* Convert spaces to + and hex escape unacceptable characters
588: */
589: for(s=keywords; *s && WHITE(*s); s++) /*scan */ ; /* Skip white space */
590: for(e = s + strlen(s); e>s && WHITE(*(e-1)) ; e--); /* Skip trailers */
591: for(q=escaped, p=s; p<e; p++) { /* scan stripped field */
592: int c = (int)TOASCII(*p);
593: if (WHITE(*p)) {
594: *q++ = '+';
595: } else if (c>=32 && c<=(char)127 && isAcceptable[c-32]) {
1.13 timbl 596: *q++ = *p; /* 930706 TBL for MVS bug */
1.2 timbl 597: } else {
598: *q++ = '%';
599: *q++ = hex(c / 16);
600: *q++ = hex(c % 16);
601: }
602: } /* Loop over string */
1.1 timbl 603:
1.2 timbl 604: *q=0;
605: /* terminate escaped sctring */
606: u=strchr(address, '?'); /* Find old search string */
607: if (u) *u = 0; /* Chop old search off */
1.1 timbl 608:
609: StrAllocCat(address, "?");
1.2 timbl 610: StrAllocCat(address, escaped);
611: free(escaped);
1.15 timbl 612: result = HTLoadRelative(address, here, request);
1.1 timbl 613: free(address);
1.2 timbl 614:
1.1 timbl 615: return result;
1.2 timbl 616: }
617:
618:
619: /* Search Given Indexname
620: ** ------
621: ** Performs a keyword search on word given by the user. Adds the keyword to
622: ** the end of the current address and attempts to open the new address.
623: **
624: ** On Entry,
625: ** *keywords space-separated keyword list or similar search list
626: ** *addres is name of object search is to be done on.
627: */
628:
1.15 timbl 629: PUBLIC BOOL HTSearchAbsolute ARGS3(
1.2 timbl 630: CONST char *, keywords,
1.15 timbl 631: CONST char *, indexname,
632: HTRequest *, request)
1.2 timbl 633: {
634: HTParentAnchor * anchor =
635: (HTParentAnchor*) HTAnchor_findAddress(indexname);
1.15 timbl 636: return HTSearch(keywords, anchor, request);
1.2 timbl 637: }
638:
639:
640: /* Generate the anchor for the home page
641: ** -------------------------------------
642: **
643: ** As it involves file access, this should only be done once
644: ** when the program first runs.
1.10 timbl 645: ** This is a default algorithm -- browser don't HAVE to use this.
646: ** But consistency betwen browsers is STRONGLY recommended!
1.2 timbl 647: **
1.10 timbl 648: ** Priority order is:
649: **
650: ** 1 WWW_HOME environment variable (logical name, etc)
651: ** 2 ~/WWW/default.html
652: ** 3 /usr/local/bin/default.html
653: ** 4 http://info.cern.ch/default.html
654: **
1.2 timbl 655: */
656: PUBLIC HTParentAnchor * HTHomeAnchor NOARGS
657: {
1.12 timbl 658: char * my_home_document = NULL;
659: char * home = (char *)getenv(LOGICAL_DEFAULT);
1.2 timbl 660: char * ref;
661: HTParentAnchor * anchor;
1.1 timbl 662:
1.12 timbl 663: if (home) {
664: StrAllocCopy(my_home_document, home);
665:
666: /* Someone telnets in, they get a special home.
667: */
668: #define MAX_FILE_NAME 1024 /* @@@ */
669: } else if (HTClientHost) { /* Telnet server */
670: FILE * fp = fopen(REMOTE_POINTER, "r");
671: char * status;
672: if (fp) {
673: my_home_document = (char*) malloc(MAX_FILE_NAME);
674: status = fgets(my_home_document, MAX_FILE_NAME, fp);
675: if (!status) {
676: free(my_home_document);
677: my_home_document = NULL;
678: }
679: fclose(fp);
680: }
681: if (!my_home_document) StrAllocCopy(my_home_document, REMOTE_ADDRESS);
682: }
683:
684:
685:
1.2 timbl 686: #ifdef unix
1.12 timbl 687:
1.10 timbl 688: if (!my_home_document) {
689: FILE * fp = NULL;
690: CONST char * home = (CONST char*)getenv("HOME");
691: if (home) {
692: my_home_document = (char *)malloc(
693: strlen(home)+1+ strlen(PERSONAL_DEFAULT)+1);
694: if (my_home_document == NULL) outofmem(__FILE__, "HTLocalName");
695: sprintf(my_home_document, "%s/%s", home, PERSONAL_DEFAULT);
696: fp = fopen(my_home_document, "r");
697: }
698:
699: if (!fp) {
700: StrAllocCopy(my_home_document, LOCAL_DEFAULT_FILE);
701: fp = fopen(my_home_document, "r");
702: }
1.2 timbl 703: if (fp) {
704: fclose(fp);
705: } else {
706: if (TRACE) fprintf(stderr,
1.10 timbl 707: "HTBrowse: No local home document ~/%s or %s\n",
708: PERSONAL_DEFAULT, LOCAL_DEFAULT_FILE);
1.11 timbl 709: free(my_home_document);
710: my_home_document = NULL;
1.2 timbl 711: }
712: }
713: #endif
1.10 timbl 714: ref = HTParse( my_home_document ? my_home_document :
715: HTClientHost ? REMOTE_ADDRESS
716: : LAST_RESORT,
717: "file:",
1.2 timbl 718: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.10 timbl 719: if (my_home_document) {
1.2 timbl 720: if (TRACE) fprintf(stderr,
721: "HTAccess: Using custom home page %s i.e. address %s\n",
1.10 timbl 722: my_home_document, ref);
723: free(my_home_document);
1.2 timbl 724: }
725: anchor = (HTParentAnchor*) HTAnchor_findAddress(ref);
726: free(ref);
727: return anchor;
1.1 timbl 728: }
729:
730:
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