Annotation of libwww/Library/src/HTAccess.c, revision 1.54
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
1.42 frystyk 11: ** 6 Oct 92 Moved HTClientHost and HTlogfile into here. TBL
1.1 timbl 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.
1.19 timbl 16: ** Dec 93 Bug change around, more reentrant, etc
1.42 frystyk 17: ** 09 May 94 logfile renamed to HTlogfile to avoid clash with WAIS
1.53 duns 18: ** 8 Jul 94 Insulate free() from _free structure element.
1.2 timbl 19: ** Bugs
20: ** This module assumes that that the graphic object is hypertext, as it
1.9 timbl 21: ** needs to select it when it has been loaded. A superclass needs to be
1.2 timbl 22: ** defined which accepts select and select_anchor.
1.1 timbl 23: */
24:
1.9 timbl 25: #ifndef DEFAULT_WAIS_GATEWAY
1.54 ! frystyk 26: #define DEFAULT_WAIS_GATEWAY "http://ptsun00.cern.ch:7001/"
! 27: #if 0
1.8 timbl 28: #define DEFAULT_WAIS_GATEWAY "http://info.cern.ch:8001/"
1.9 timbl 29: #endif
1.54 ! frystyk 30: #endif
1.8 timbl 31:
1.1 timbl 32: /* Implements:
33: */
34: #include "HTAccess.h"
35:
36: /* Uses:
37: */
38:
39: #include "HTParse.h"
40: #include "HTUtils.h"
1.4 timbl 41: #include "HTML.h" /* SCW */
1.2 timbl 42:
43: #ifndef NO_RULES
44: #include "HTRules.h"
45: #endif
46:
47: #include "HTList.h"
48: #include "HText.h" /* See bugs above */
49: #include "HTAlert.h"
1.17 timbl 50: #include "HTFWriter.h" /* for cache stuff */
51: #include "HTTee.h"
1.46 frystyk 52: #include "HTError.h"
1.2 timbl 53:
1.54 ! frystyk 54: /* These flags may be set to modify the operation of this module */
! 55: PUBLIC char * HTCacheDir = NULL; /* Root for cached files or 0 for no cache */
! 56: PUBLIC char * HTSaveLocallyDir = SAVE_LOCALLY_HOME_DIR; /* Save & exe files */
! 57: PUBLIC char * HTClientHost = 0; /* Name of remote login host if any */
! 58: PUBLIC FILE * HTlogfile = 0; /* File to which to output one-liners */
1.41 luotonen 59:
1.34 frystyk 60: PUBLIC BOOL HTForceReload = NO; /* Force reload from cache or net */
1.12 timbl 61: PUBLIC BOOL HTSecure = NO; /* Disable access for telnet users? */
1.27 luotonen 62: PUBLIC BOOL using_proxy = NO; /* are we using a proxy gateway? */
1.43 luotonen 63: PUBLIC char * HTImServer = NULL;/* cern_httpd sets this to the translated URL*/
1.27 luotonen 64: PUBLIC BOOL HTImProxy = NO; /* cern_httpd as a proxy? */
1.1 timbl 65:
1.43 luotonen 66:
1.2 timbl 67: /* To generate other things, play with these:
68: */
69:
1.15 timbl 70: /* PUBLIC HTFormat HTOutputFormat = NULL; use request->output_format */
71: /* PUBLIC HTStream* HTOutputStream = NULL; use request->output_stream */
1.1 timbl 72:
73: PRIVATE HTList * protocols = NULL; /* List of registered protocol descriptors */
74:
1.24 timbl 75: /* Superclass defn */
1.1 timbl 76:
1.24 timbl 77: struct _HTStream {
78: HTStreamClass * isa;
79: /* ... */
80: };
81:
1.15 timbl 82: /* Create a request structure
83: ** ---------------------------
84: */
85:
86: PUBLIC HTRequest * HTRequest_new NOARGS
87: {
1.28 luotonen 88: HTRequest * me = (HTRequest*) calloc(1, sizeof(*me)); /* zero fill */
1.15 timbl 89: if (!me) outofmem(__FILE__, "HTRequest_new()");
90:
1.20 luotonen 91: me->conversions = HTList_new(); /* No conversions registerd yet */
92: me->output_format = WWW_PRESENT; /* default it to present to user */
93:
1.15 timbl 94: return me;
95: }
96:
97:
1.49 frystyk 98: /* Clear a request structure
99: ** ---------------------------
100: ** This function clears the reguest structure so that only the
101: ** conversions remain. Everything else is as if it was created from
102: ** scratch.
103: */
104: PUBLIC void HTRequest_clear ARGS1(HTRequest *, req)
105: {
106: HTList *conversions;
107: if (!req) {
108: if (TRACE)
109: fprintf(stderr, "Clear....... request: Bad argument!\n");
110: return;
111: }
112: conversions = req->conversions; /* Save the conversions */
113: HTErrorFree(req);
114: HTAACleanup(req);
115: FREE(req->from);
116: memset(req, '\0', sizeof(HTRequest));
117:
118: /* Now initialize as from scratch but with the old list of conversions */
119: req->conversions = conversions;
120: req->output_format = WWW_PRESENT; /* default it to present to user */
121: }
122:
123:
1.20 luotonen 124: /* Delete a request structure
125: ** --------------------------
126: */
127: PUBLIC void HTRequest_delete ARGS1(HTRequest *, req)
128: {
129: if (req) {
1.34 frystyk 130: HTFormatDelete(req->conversions);
1.46 frystyk 131: HTErrorFree(req);
1.34 frystyk 132: HTAACleanup(req);
1.37 luotonen 133: FREE(req->from);
1.34 frystyk 134: FREE(req);
1.20 luotonen 135: }
136: }
137:
138:
1.22 luotonen 139: PRIVATE char * method_names[(int)MAX_METHODS + 1] =
140: {
141: "INVALID-METHOD",
142: "GET",
143: "HEAD",
144: "POST",
145: "PUT",
146: "DELETE",
147: "CHECKOUT",
148: "CHECKIN",
149: "SHOWMETHOD",
150: "LINK",
151: "UNLINK",
152: NULL
153: };
154:
155: /* Get method enum value
156: ** ---------------------
157: */
158: PUBLIC HTMethod HTMethod_enum ARGS1(char *, name)
159: {
160: if (name) {
161: int i;
162: for (i=1; i < (int)MAX_METHODS; i++)
163: if (!strcmp(name, method_names[i]))
164: return (HTMethod)i;
165: }
166: return METHOD_INVALID;
167: }
168:
169:
170: /* Get method name
171: ** ---------------
172: */
173: PUBLIC char * HTMethod_name ARGS1(HTMethod, method)
174: {
175: if ((int)method > (int)METHOD_INVALID &&
176: (int)method < (int)MAX_METHODS)
177: return method_names[(int)method];
178: else
179: return method_names[(int)METHOD_INVALID];
180: }
181:
182:
183: /* Is method in a list of method names?
184: ** -----------------------------------
185: */
186: PUBLIC BOOL HTMethod_inList ARGS2(HTMethod, method,
187: HTList *, list)
188: {
189: char * method_name = HTMethod_name(method);
190: HTList *cur = list;
191: char *item;
192:
193: while (NULL != (item = (char*)HTList_nextObject(cur))) {
194: CTRACE(stderr, " %s", item);
195: if (0==strcasecomp(item, method_name))
196: return YES;
197: }
198: return NO; /* Not found */
199: }
200:
201:
202:
203:
1.20 luotonen 204:
1.1 timbl 205: /* Register a Protocol HTRegisterProtocol
206: ** -------------------
207: */
208:
209: PUBLIC BOOL HTRegisterProtocol(protocol)
210: HTProtocol * protocol;
211: {
212: if (!protocols) protocols = HTList_new();
213: HTList_addObject(protocols, protocol);
214: return YES;
215: }
216:
217:
218: /* Register all known protocols
219: ** ----------------------------
220: **
221: ** Add to or subtract from this list if you add or remove protocol modules.
222: ** This routine is called the first time the protocol list is needed,
1.52 frystyk 223: ** unless any protocols are already registered, in which case it is not
224: ** called. Therefore the application can override this list.
1.1 timbl 225: **
226: ** Compiling with NO_INIT prevents all known protocols from being forced
227: ** in at link time.
228: */
229: #ifndef NO_INIT
230: PRIVATE void HTAccessInit NOARGS /* Call me once */
231: {
1.14 duns 232: GLOBALREF HTProtocol HTTP, HTFile, HTTelnet, HTTn3270, HTRlogin;
1.1 timbl 233: #ifndef DECNET
1.54 ! frystyk 234: #ifdef NEW_CODE
! 235: GLOBALREF HTProtocol HTFTP, HTNews, HTNNTP, HTGopher;
! 236: #endif
1.14 duns 237: GLOBALREF HTProtocol HTFTP, HTNews, HTGopher;
1.42 frystyk 238:
1.3 timbl 239: #ifdef DIRECT_WAIS
1.14 duns 240: GLOBALREF HTProtocol HTWAIS;
1.3 timbl 241: #endif
1.2 timbl 242: HTRegisterProtocol(&HTFTP);
243: HTRegisterProtocol(&HTNews);
1.54 ! frystyk 244: #ifdef NEW_CODE
! 245: HTRegisterProtocol(&HTNNTP);
! 246: #endif
1.2 timbl 247: HTRegisterProtocol(&HTGopher);
1.42 frystyk 248:
1.3 timbl 249: #ifdef DIRECT_WAIS
250: HTRegisterProtocol(&HTWAIS);
251: #endif
1.1 timbl 252:
1.54 ! frystyk 253: #endif /* DECNET */
1.2 timbl 254: HTRegisterProtocol(&HTTP);
255: HTRegisterProtocol(&HTFile);
256: HTRegisterProtocol(&HTTelnet);
257: HTRegisterProtocol(&HTTn3270);
258: HTRegisterProtocol(&HTRlogin);
1.1 timbl 259: }
260: #endif
261:
262:
1.33 luotonen 263:
264: /* override_proxy()
265: **
266: ** Check the no_proxy environment variable to get the list
267: ** of hosts for which proxy server is not consulted.
268: **
269: ** no_proxy is a comma- or space-separated list of machine
270: ** or domain names, with optional :port part. If no :port
271: ** part is present, it applies to all ports on that domain.
272: **
273: ** Example:
274: ** no_proxy="cern.ch,some.domain:8001"
275: **
276: */
277: PRIVATE BOOL override_proxy ARGS1(CONST char *, addr)
278: {
279: CONST char * no_proxy = getenv("no_proxy");
280: char * p = NULL;
281: char * host = NULL;
282: int port = 0;
283: int h_len = 0;
284:
285: if (!no_proxy || !addr || !(host = HTParse(addr, "", PARSE_HOST)))
286: return NO;
287: if (!*host) { free(host); return NO; }
288:
1.34 frystyk 289: if ((p = strchr(host, ':')) != NULL) { /* Port specified */
1.33 luotonen 290: *p++ = 0; /* Chop off port */
291: port = atoi(p);
292: }
293: else { /* Use default port */
294: char * access = HTParse(addr, "", PARSE_ACCESS);
295: if (access) {
296: if (!strcmp(access,"http")) port = 80;
297: else if (!strcmp(access,"gopher")) port = 70;
298: else if (!strcmp(access,"ftp")) port = 21;
299: free(access);
300: }
301: }
302: if (!port) port = 80; /* Default */
303: h_len = strlen(host);
304:
305: while (*no_proxy) {
306: CONST char * end;
307: CONST char * colon = NULL;
308: int templ_port = 0;
309: int t_len;
310:
311: while (*no_proxy && (WHITE(*no_proxy) || *no_proxy==','))
312: no_proxy++; /* Skip whitespace and separators */
313:
314: end = no_proxy;
315: while (*end && !WHITE(*end) && *end != ',') { /* Find separator */
316: if (*end==':') colon = end; /* Port number given */
317: end++;
318: }
319:
320: if (colon) {
321: templ_port = atoi(colon+1);
322: t_len = colon - no_proxy;
323: }
324: else {
325: t_len = end - no_proxy;
326: }
327:
328: if ((!templ_port || templ_port == port) &&
329: (t_len > 0 && t_len <= h_len &&
330: !strncmp(host + h_len - t_len, no_proxy, t_len))) {
331: free(host);
332: return YES;
333: }
334: if (*end) no_proxy = end+1;
335: else break;
336: }
337:
338: free(host);
339: return NO;
340: }
341:
342:
343:
1.2 timbl 344: /* Find physical name and access protocol
345: ** --------------------------------------
1.1 timbl 346: **
347: **
348: ** On entry,
349: ** addr must point to the fully qualified hypertext reference.
350: ** anchor a pareent anchor with whose address is addr
351: **
352: ** On exit,
1.2 timbl 353: ** returns HT_NO_ACCESS Error has occured.
354: ** HT_OK Success
1.1 timbl 355: **
356: */
1.21 luotonen 357: PRIVATE int get_physical ARGS1(HTRequest *, req)
358: {
1.1 timbl 359: char * access=0; /* Name of access method */
1.21 luotonen 360: char * addr = HTAnchor_address((HTAnchor*)req->anchor); /* free me */
1.27 luotonen 361:
1.35 luotonen 362: /*
363: ** This HACK is here until we have redirection implemented.
364: ** This is used when we are recursively calling HTLoad().
365: ** We then take the physical address, because currently the
366: ** virtual address is kept in a hash table so it can't be
367: ** changed -- otherwise it wouldn't be found anymore.
368: */
1.36 luotonen 369: if (HTAnchor_physical(req->anchor))
370: StrAllocCopy(addr, HTAnchor_physical(req->anchor));
1.35 luotonen 371:
1.2 timbl 372: #ifndef NO_RULES
1.47 luotonen 373: if (HTImServer) { /* cern_httpd has already done its own translations */
1.45 luotonen 374: HTAnchor_setPhysical(req->anchor, HTImServer);
1.47 luotonen 375: StrAllocCopy(addr, HTImServer); /* Oops, queries thru many proxies */
376: /* didn't work without this -- AL */
377: }
1.21 luotonen 378: else {
1.27 luotonen 379: char * physical = HTTranslate(addr);
1.21 luotonen 380: if (!physical) {
1.47 luotonen 381: free(addr);
1.21 luotonen 382: return HT_FORBIDDEN;
383: }
384: HTAnchor_setPhysical(req->anchor, physical);
385: free(physical); /* free our copy */
1.2 timbl 386: }
387: #else
1.21 luotonen 388: HTAnchor_setPhysical(req->anchor, addr);
1.2 timbl 389: #endif
390:
1.21 luotonen 391: access = HTParse(HTAnchor_physical(req->anchor),
1.27 luotonen 392: "file:", PARSE_ACCESS);
1.1 timbl 393:
394: /* Check whether gateway access has been set up for this
1.8 timbl 395: **
396: ** This function can be replaced by the rule system above.
1.1 timbl 397: */
1.8 timbl 398: #define USE_GATEWAYS
1.1 timbl 399: #ifdef USE_GATEWAYS
1.39 luotonen 400:
401: /* make sure the using_proxy variable is false */
402: using_proxy = NO;
403:
1.33 luotonen 404: if (!override_proxy(addr)) {
1.27 luotonen 405: char * gateway_parameter, *gateway, *proxy;
406:
1.2 timbl 407: gateway_parameter = (char *)malloc(strlen(access)+20);
408: if (gateway_parameter == NULL) outofmem(__FILE__, "HTLoad");
1.27 luotonen 409:
410: /* search for proxy gateways */
1.2 timbl 411: strcpy(gateway_parameter, "WWW_");
412: strcat(gateway_parameter, access);
413: strcat(gateway_parameter, "_GATEWAY");
414: gateway = (char *)getenv(gateway_parameter); /* coerce for decstation */
1.27 luotonen 415:
416: /* search for proxy servers */
417: strcpy(gateway_parameter, access);
418: strcat(gateway_parameter, "_proxy");
419: proxy = (char *)getenv(gateway_parameter);
420:
1.2 timbl 421: free(gateway_parameter);
1.27 luotonen 422:
423: if (TRACE && gateway)
424: fprintf(stderr,"Gateway found: %s\n",gateway);
425: if (TRACE && proxy)
426: fprintf(stderr,"Proxy server found: %s\n",proxy);
427:
1.8 timbl 428: #ifndef DIRECT_WAIS
1.9 timbl 429: if (!gateway && 0==strcmp(access, "wais")) {
1.8 timbl 430: gateway = DEFAULT_WAIS_GATEWAY;
431: }
432: #endif
1.27 luotonen 433:
434: /* proxy servers have precedence over gateway servers */
435: if (proxy) {
436: char * gatewayed=0;
437:
438: StrAllocCopy(gatewayed,proxy);
439: StrAllocCat(gatewayed,addr);
440: using_proxy = YES;
441: HTAnchor_setPhysical(req->anchor, gatewayed);
442: free(gatewayed);
443: free(access);
444:
445: access = HTParse(HTAnchor_physical(req->anchor),
446: "http:", PARSE_ACCESS);
447: } else if (gateway) {
1.9 timbl 448: char * path = HTParse(addr, "",
449: PARSE_HOST + PARSE_PATH + PARSE_PUNCTUATION);
450: /* Chop leading / off to make host into part of path */
451: char * gatewayed = HTParse(path+1, gateway, PARSE_ALL);
452: free(path);
1.21 luotonen 453: HTAnchor_setPhysical(req->anchor, gatewayed);
1.9 timbl 454: free(gatewayed);
1.2 timbl 455: free(access);
1.9 timbl 456:
1.21 luotonen 457: access = HTParse(HTAnchor_physical(req->anchor),
1.8 timbl 458: "http:", PARSE_ACCESS);
1.2 timbl 459: }
460: }
1.1 timbl 461: #endif
462:
1.19 timbl 463: free(addr);
1.1 timbl 464:
465:
466: /* Search registered protocols to find suitable one
467: */
468: {
1.20 luotonen 469: HTList *cur;
470: HTProtocol *p;
1.1 timbl 471: #ifndef NO_INIT
1.2 timbl 472: if (!protocols) HTAccessInit();
1.1 timbl 473: #endif
1.20 luotonen 474: cur = protocols;
475: while ((p = (HTProtocol*)HTList_nextObject(cur))) {
1.2 timbl 476: if (strcmp(p->name, access)==0) {
1.21 luotonen 477: HTAnchor_setProtocol(req->anchor, p);
1.2 timbl 478: free(access);
479: return (HT_OK);
1.1 timbl 480: }
481: }
482: }
483:
484: free(access);
1.2 timbl 485: return HT_NO_ACCESS;
1.1 timbl 486: }
487:
488:
489: /* Load a document
490: ** ---------------
491: **
1.2 timbl 492: ** This is an internal routine, which has an address AND a matching
493: ** anchor. (The public routines are called with one OR the other.)
494: **
495: ** On entry,
1.15 timbl 496: ** request->
1.35 luotonen 497: ** anchor a parent anchor with fully qualified
498: ** hypertext reference as its address set
1.15 timbl 499: ** output_format valid
500: ** output_stream valid on NULL
1.2 timbl 501: **
502: ** On exit,
503: ** returns <0 Error has occured.
504: ** HT_LOADED Success
505: ** HT_NO_DATA Success, but no document loaded.
1.8 timbl 506: ** (telnet sesssion started etc)
1.2 timbl 507: **
508: */
1.52 frystyk 509: PUBLIC int HTLoad ARGS2(HTRequest *, request, BOOL, keep_error_stack)
1.2 timbl 510: {
1.25 frystyk 511: char *arg = NULL;
512: HTProtocol *p;
513: int status;
514:
1.22 luotonen 515: if (request->method == METHOD_INVALID)
516: request->method = METHOD_GET;
1.52 frystyk 517: if (!keep_error_stack) {
518: HTErrorFree(request);
519: request->error_block = NO;
520: }
521:
1.21 luotonen 522: status = get_physical(request);
1.2 timbl 523: if (status == HT_FORBIDDEN) {
1.49 frystyk 524: char *url = HTAnchor_address((HTAnchor *) request->anchor);
525: if (url) {
526: HTUnEscape(url);
527: HTErrorAdd(request, ERR_FATAL, NO, HTERR_FORBIDDEN,
528: (void *) url, (int) strlen(url), "HTLoad");
529: free(url);
530: } else {
531: HTErrorAdd(request, ERR_FATAL, NO, HTERR_FORBIDDEN,
532: NULL, 0, "HTLoad");
533: }
534: return -1;
1.2 timbl 535: }
536: if (status < 0) return status; /* Can't resolve or forbidden */
1.25 frystyk 537:
538: if(!(arg = HTAnchor_physical(request->anchor)) || !*arg)
539: return (-1);
1.27 luotonen 540:
1.15 timbl 541: p = HTAnchor_protocol(request->anchor);
1.17 timbl 542: return (*(p->load))(request);
1.2 timbl 543: }
544:
545:
546: /* Get a save stream for a document
547: ** --------------------------------
548: */
1.19 timbl 549: PUBLIC HTStream *HTSaveStream ARGS1(HTRequest *, request)
1.15 timbl 550: {
551: HTProtocol * p;
1.19 timbl 552: int status;
1.22 luotonen 553: request->method = METHOD_PUT;
1.21 luotonen 554: status = get_physical(request);
1.19 timbl 555: if (status == HT_FORBIDDEN) {
1.49 frystyk 556: char *url = HTAnchor_address((HTAnchor *) request->anchor);
557: if (url) {
558: HTUnEscape(url);
559: HTErrorAdd(request, ERR_FATAL, NO, HTERR_FORBIDDEN,
560: (void *) url, (int) strlen(url), "HTLoad");
561: free(url);
562: } else {
563: HTErrorAdd(request, ERR_FATAL, NO, HTERR_FORBIDDEN,
564: NULL, 0, "HTLoad");
565: }
566: return NULL; /* should return error status? */
1.19 timbl 567: }
568: if (status < 0) return NULL; /* @@ error. Can't resolve or forbidden */
569:
1.15 timbl 570: p = HTAnchor_protocol(request->anchor);
1.2 timbl 571: if (!p) return NULL;
572:
1.15 timbl 573: return (*p->saveStream)(request);
1.2 timbl 574:
575: }
576:
577:
578: /* Load a document - with logging etc
579: ** ----------------------------------
580: **
581: ** - Checks or documents already loaded
582: ** - Logs the access
583: ** - Allows stdin filter option
584: ** - Trace ouput and error messages
585: **
1.1 timbl 586: ** On Entry,
1.19 timbl 587: ** request->anchor valid for of the document to be accessed.
588: ** request->childAnchor optional anchor within doc to be selected
589: **
1.2 timbl 590: ** filter if YES, treat stdin as HTML
1.1 timbl 591: **
1.15 timbl 592: ** request->anchor is the node_anchor for the document
593: ** request->output_format is valid
594: **
1.1 timbl 595: ** On Exit,
596: ** returns YES Success in opening document
597: ** NO Failure
598: **
599: */
600:
1.52 frystyk 601: PRIVATE BOOL HTLoadDocument ARGS2(HTRequest *, request,
602: BOOL, keep_error_stack)
1.1 timbl 603:
604: {
605: int status;
606: HText * text;
1.19 timbl 607: char * full_address = HTAnchor_address((HTAnchor*)request->anchor);
1.54 ! frystyk 608:
1.49 frystyk 609: if (TRACE) fprintf (stderr, "HTAccess.... Loading document %s\n",
610: full_address);
1.1 timbl 611:
1.18 timbl 612: request->using_cache = NULL;
613:
1.15 timbl 614: if (!request->output_format) request->output_format = WWW_PRESENT;
1.25 frystyk 615:
1.31 frystyk 616: if (!HTForceReload && (text=(HText *)HTAnchor_document(request->anchor)))
1.15 timbl 617: { /* Already loaded */
1.1 timbl 618: if (TRACE) fprintf(stderr, "HTAccess: Document already in memory.\n");
1.19 timbl 619: if (request->childAnchor) {
620: HText_selectAnchor(text, request->childAnchor);
621: } else {
622: HText_select(text);
623: }
624: free(full_address);
1.1 timbl 625: return YES;
626: }
1.17 timbl 627:
1.34 frystyk 628: /* Check the Cache */
1.17 timbl 629: /* Bug: for each format, we only check whether it is ok, we
630: don't check them all and chose the best */
1.54 ! frystyk 631: if (request->anchor->cacheItems) {
1.17 timbl 632: HTList * list = request->anchor->cacheItems;
1.20 luotonen 633: HTList * cur = list;
634: HTCacheItem * item;
635:
636: while ((item = (HTCacheItem*)HTList_nextObject(cur))) {
1.18 timbl 637: HTStream * s;
638:
639: request->using_cache = item;
640:
1.37 luotonen 641: s = HTStreamStack(item->format, request, NO);
1.17 timbl 642: if (s) { /* format was suitable */
643: FILE * fp = fopen(item->filename, "r");
1.18 timbl 644: if (TRACE) fprintf(stderr, "Cache: HIT file %s for %s\n",
1.20 luotonen 645: item->filename,
646: full_address);
1.17 timbl 647: if (fp) {
648: HTFileCopy(fp, s);
1.53 duns 649: (*s->isa->_free)(s); /* close up pipeline */
1.17 timbl 650: fclose(fp);
1.19 timbl 651: free(full_address);
1.17 timbl 652: return YES;
653: } else {
654: fprintf(stderr, "***** Can't read cache file %s !\n",
1.20 luotonen 655: item->filename);
1.17 timbl 656: } /* file open ok */
657: } /* stream ok */
658: } /* next cache item */
659: } /* if cache available for this anchor */
1.1 timbl 660:
1.52 frystyk 661: status = HTLoad(request, keep_error_stack);
1.2 timbl 662:
1.1 timbl 663: /* Log the access if necessary
664: */
1.42 frystyk 665: if (HTlogfile) {
1.1 timbl 666: time_t theTime;
667: time(&theTime);
1.42 frystyk 668: fprintf(HTlogfile, "%24.24s %s %s %s\n",
1.1 timbl 669: ctime(&theTime),
670: HTClientHost ? HTClientHost : "local",
671: status<0 ? "FAIL" : "GET",
672: full_address);
1.42 frystyk 673: fflush(HTlogfile); /* Actually update it on disk */
1.1 timbl 674: if (TRACE) fprintf(stderr, "Log: %24.24s %s %s %s\n",
675: ctime(&theTime),
676: HTClientHost ? HTClientHost : "local",
677: status<0 ? "FAIL" : "GET",
678: full_address);
679: }
680:
1.52 frystyk 681: /* The error stack might contain general information to the client
682: about what has been going on in the library (not only errors) */
683: if (request->error_stack)
684: HTErrorMsg(request);
685:
1.1 timbl 686: if (status == HT_LOADED) {
687: if (TRACE) {
1.54 ! frystyk 688: fprintf(stderr, "HTAccess.... `%s' has been accessed.\n",
1.1 timbl 689: full_address);
690: }
1.19 timbl 691: free(full_address);
1.1 timbl 692: return YES;
693: }
694:
695: if (status == HT_NO_DATA) {
696: if (TRACE) {
697: fprintf(stderr,
1.54 ! frystyk 698: "HTAccess.... `%s' has been accessed, No data left.\n",
1.1 timbl 699: full_address);
700: }
1.19 timbl 701: free(full_address);
1.1 timbl 702: return NO;
703: }
704:
1.34 frystyk 705: /* Bug fix thanks to Lou Montulli. Henrik 10/03-94 */
706: if (status<=0) { /* Failure in accessing a document */
1.1 timbl 707: #ifdef CURSES
708: user_message("Can't access `%s'", full_address);
709: #else
1.5 timbl 710: if (TRACE) fprintf(stderr,
711: "HTAccess: Can't access `%s'\n", full_address);
1.1 timbl 712: #endif
1.19 timbl 713: free(full_address);
1.1 timbl 714: return NO;
715: }
1.9 timbl 716:
717: /* If you get this, then please find which routine is returning
718: a positive unrecognised error code! */
1.1 timbl 719: fprintf(stderr,
1.50 frystyk 720: "**** HTAccess: Internal software error in CERN WWWLib version %s ****\n\nPlease mail www-bug@info.cern.ch quoting what software and what version you are using\nand the URL: %s that caused the problem, thanks!\n",
721: HTLibraryVersion,
722: full_address);
1.19 timbl 723: free(full_address);
724:
1.1 timbl 725: exit(-6996);
1.20 luotonen 726: return NO; /* For gcc :-( */
1.2 timbl 727: } /* HTLoadDocument */
1.1 timbl 728:
729:
730:
731: /* Load a document from absolute name
732: ** ---------------
733: **
734: ** On Entry,
735: ** addr The absolute address of the document to be accessed.
736: ** filter if YES, treat document as HTML
737: **
738: ** On Exit,
739: ** returns YES Success in opening document
740: ** NO Failure
741: **
742: **
743: */
744:
1.15 timbl 745: PUBLIC BOOL HTLoadAbsolute ARGS2(CONST char *,addr, HTRequest*, request)
1.2 timbl 746: {
1.19 timbl 747: HTAnchor * anchor = HTAnchor_findAddress(addr);
748: request->anchor = HTAnchor_parent(anchor);
749: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ?
750: NULL : (HTChildAnchor*) anchor;
1.52 frystyk 751: return HTLoadDocument(request, NO);
1.2 timbl 752: }
753:
754:
755: /* Load a document from absolute name to stream
756: ** --------------------------------------------
757: **
758: ** On Entry,
759: ** addr The absolute address of the document to be accessed.
1.15 timbl 760: ** request->output_stream if non-NULL, send data down this stream
1.2 timbl 761: **
762: ** On Exit,
763: ** returns YES Success in opening document
764: ** NO Failure
765: **
766: **
767: */
768:
769: PUBLIC BOOL HTLoadToStream ARGS3(
770: CONST char *, addr,
771: BOOL, filter,
1.15 timbl 772: HTRequest*, request)
1.1 timbl 773: {
1.19 timbl 774: HTAnchor * anchor = HTAnchor_findAddress(addr);
775: request->anchor = HTAnchor_parent(anchor);
776: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL :
777: (HTChildAnchor*) anchor;
1.15 timbl 778: request->output_stream = request->output_stream;
1.52 frystyk 779: return HTLoadDocument(request, NO);
1.1 timbl 780: }
781:
782:
1.2 timbl 783:
784:
1.1 timbl 785: /* Load a document from relative name
786: ** ---------------
787: **
788: ** On Entry,
1.2 timbl 789: ** relative_name The relative address of the document
790: ** to be accessed.
1.1 timbl 791: **
792: ** On Exit,
793: ** returns YES Success in opening document
794: ** NO Failure
795: **
796: **
797: */
798:
1.15 timbl 799: PUBLIC BOOL HTLoadRelative ARGS3(
1.2 timbl 800: CONST char *, relative_name,
1.15 timbl 801: HTParentAnchor *, here,
1.20 luotonen 802: HTRequest *, request)
1.1 timbl 803: {
804: char * full_address = 0;
805: BOOL result;
806: char * mycopy = 0;
807: char * stripped = 0;
808: char * current_address =
1.2 timbl 809: HTAnchor_address((HTAnchor*)here);
1.1 timbl 810:
811: StrAllocCopy(mycopy, relative_name);
812:
813: stripped = HTStrip(mycopy);
814: full_address = HTParse(stripped,
815: current_address,
816: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.15 timbl 817: result = HTLoadAbsolute(full_address, request);
1.1 timbl 818: free(full_address);
819: free(current_address);
820: free(mycopy); /* Memory leak fixed 10/7/92 -- JFG */
821: return result;
822: }
823:
824:
825: /* Load if necessary, and select an anchor
826: ** --------------------------------------
827: **
828: ** On Entry,
829: ** destination The child or parenet anchor to be loaded.
830: **
831: ** On Exit,
832: ** returns YES Success
833: ** NO Failure
834: **
835: */
836:
1.15 timbl 837: PUBLIC BOOL HTLoadAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1.1 timbl 838: {
1.15 timbl 839: if (!anchor) return NO; /* No link */
1.1 timbl 840:
1.15 timbl 841: request->anchor = HTAnchor_parent(anchor);
1.19 timbl 842: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
843: : (HTChildAnchor*) anchor;
1.1 timbl 844:
1.52 frystyk 845: return HTLoadDocument(request, NO) ? YES : NO;
846:
847: } /* HTLoadAnchor */
848:
849:
850: /* Load if necessary, and select an anchor
851: ** --------------------------------------
852: **
853: ** This function is almost identical to HTLoadAnchor, but it doesn't
854: ** clear the error stack so that the information in there is kept.
855: **
856: ** On Entry,
857: ** destination The child or parenet anchor to be loaded.
858: **
859: ** On Exit,
860: ** returns YES Success
861: ** NO Failure
862: **
863: */
864:
865: PUBLIC BOOL HTLoadAnchorRecursive ARGS2(HTAnchor*, anchor,
866: HTRequest *, request)
867: {
868: if (!anchor) return NO; /* No link */
869:
870: request->anchor = HTAnchor_parent(anchor);
871: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
872: : (HTChildAnchor*) anchor;
873:
874: return HTLoadDocument(request, YES) ? YES : NO;
1.1 timbl 875:
876: } /* HTLoadAnchor */
877:
878:
879: /* Search
880: ** ------
881: ** Performs a keyword search on word given by the user. Adds the keyword to
882: ** the end of the current address and attempts to open the new address.
883: **
884: ** On Entry,
885: ** *keywords space-separated keyword list or similar search list
1.2 timbl 886: ** here is anchor search is to be done on.
1.1 timbl 887: */
888:
1.2 timbl 889: PRIVATE char hex(i)
890: int i;
891: {
1.13 timbl 892: char * hexchars = "0123456789ABCDEF";
893: return hexchars[i];
1.2 timbl 894: }
1.1 timbl 895:
1.15 timbl 896: PUBLIC BOOL HTSearch ARGS3(
1.2 timbl 897: CONST char *, keywords,
1.15 timbl 898: HTParentAnchor *, here,
899: HTRequest *, request)
1.1 timbl 900: {
1.2 timbl 901:
902: #define acceptable \
903: "1234567890abcdefghijlkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_"
904:
905: char *q, *u;
906: CONST char * p, *s, *e; /* Pointers into keywords */
907: char * address = HTAnchor_address((HTAnchor*)here);
1.1 timbl 908: BOOL result;
1.2 timbl 909: char * escaped = malloc(strlen(keywords)*3+1);
910:
1.29 frystyk 911: /* static CONST BOOL isAcceptable[96] = */
912: /* static AND const is not good for a gnu compiler! Frystyk 25/02-94 */
1.30 luotonen 913: static BOOL isAcceptable[96] =
1.2 timbl 914: /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
915: { 0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0, /* 2x !"#$%&'()*+,-./ */
916: 1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0, /* 3x 0123456789:;<=>? */
917: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 4x @ABCDEFGHIJKLMNO */
918: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1, /* 5X PQRSTUVWXYZ[\]^_ */
919: 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 6x `abcdefghijklmno */
920: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0 }; /* 7X pqrstuvwxyz{\}~ DEL */
921:
922: if (escaped == NULL) outofmem(__FILE__, "HTSearch");
923:
1.29 frystyk 924: /* Convert spaces to + and hex escape unacceptable characters */
1.2 timbl 925:
1.29 frystyk 926: for(s=keywords; *s && WHITE(*s); s++); /*scan */ /* Skip white space */
927: for(e = s + strlen(s); e>s && WHITE(*(e-1)) ; e--); /* Skip trailers */
928: for(q=escaped, p=s; p<e; p++) { /* scan stripped field */
1.2 timbl 929: int c = (int)TOASCII(*p);
930: if (WHITE(*p)) {
931: *q++ = '+';
1.29 frystyk 932: } else if (c>=32 && c<=127 && isAcceptable[c-32] != 0) {
1.13 timbl 933: *q++ = *p; /* 930706 TBL for MVS bug */
1.2 timbl 934: } else {
935: *q++ = '%';
936: *q++ = hex(c / 16);
937: *q++ = hex(c % 16);
938: }
939: } /* Loop over string */
1.1 timbl 940:
1.2 timbl 941: *q=0;
942: /* terminate escaped sctring */
943: u=strchr(address, '?'); /* Find old search string */
944: if (u) *u = 0; /* Chop old search off */
1.1 timbl 945:
946: StrAllocCat(address, "?");
1.2 timbl 947: StrAllocCat(address, escaped);
948: free(escaped);
1.15 timbl 949: result = HTLoadRelative(address, here, request);
1.1 timbl 950: free(address);
1.2 timbl 951:
1.1 timbl 952: return result;
1.2 timbl 953: }
954:
955:
956: /* Search Given Indexname
957: ** ------
958: ** Performs a keyword search on word given by the user. Adds the keyword to
959: ** the end of the current address and attempts to open the new address.
960: **
961: ** On Entry,
962: ** *keywords space-separated keyword list or similar search list
963: ** *addres is name of object search is to be done on.
964: */
965:
1.15 timbl 966: PUBLIC BOOL HTSearchAbsolute ARGS3(
1.2 timbl 967: CONST char *, keywords,
1.15 timbl 968: CONST char *, indexname,
969: HTRequest *, request)
1.2 timbl 970: {
971: HTParentAnchor * anchor =
972: (HTParentAnchor*) HTAnchor_findAddress(indexname);
1.15 timbl 973: return HTSearch(keywords, anchor, request);
1.2 timbl 974: }
975:
976:
977: /* Generate the anchor for the home page
978: ** -------------------------------------
979: **
980: ** As it involves file access, this should only be done once
981: ** when the program first runs.
1.10 timbl 982: ** This is a default algorithm -- browser don't HAVE to use this.
983: ** But consistency betwen browsers is STRONGLY recommended!
1.2 timbl 984: **
1.10 timbl 985: ** Priority order is:
986: **
987: ** 1 WWW_HOME environment variable (logical name, etc)
988: ** 2 ~/WWW/default.html
989: ** 3 /usr/local/bin/default.html
990: ** 4 http://info.cern.ch/default.html
991: **
1.2 timbl 992: */
993: PUBLIC HTParentAnchor * HTHomeAnchor NOARGS
994: {
1.12 timbl 995: char * my_home_document = NULL;
996: char * home = (char *)getenv(LOGICAL_DEFAULT);
1.2 timbl 997: char * ref;
998: HTParentAnchor * anchor;
1.1 timbl 999:
1.12 timbl 1000: if (home) {
1001: StrAllocCopy(my_home_document, home);
1002:
1003: /* Someone telnets in, they get a special home.
1004: */
1005: #define MAX_FILE_NAME 1024 /* @@@ */
1006: } else if (HTClientHost) { /* Telnet server */
1007: FILE * fp = fopen(REMOTE_POINTER, "r");
1008: char * status;
1009: if (fp) {
1010: my_home_document = (char*) malloc(MAX_FILE_NAME);
1011: status = fgets(my_home_document, MAX_FILE_NAME, fp);
1012: if (!status) {
1013: free(my_home_document);
1014: my_home_document = NULL;
1015: }
1016: fclose(fp);
1017: }
1018: if (!my_home_document) StrAllocCopy(my_home_document, REMOTE_ADDRESS);
1019: }
1020:
1021:
1022:
1.2 timbl 1023: #ifdef unix
1.12 timbl 1024:
1.10 timbl 1025: if (!my_home_document) {
1026: FILE * fp = NULL;
1027: CONST char * home = (CONST char*)getenv("HOME");
1028: if (home) {
1029: my_home_document = (char *)malloc(
1030: strlen(home)+1+ strlen(PERSONAL_DEFAULT)+1);
1031: if (my_home_document == NULL) outofmem(__FILE__, "HTLocalName");
1032: sprintf(my_home_document, "%s/%s", home, PERSONAL_DEFAULT);
1033: fp = fopen(my_home_document, "r");
1034: }
1035:
1036: if (!fp) {
1037: StrAllocCopy(my_home_document, LOCAL_DEFAULT_FILE);
1038: fp = fopen(my_home_document, "r");
1039: }
1.2 timbl 1040: if (fp) {
1041: fclose(fp);
1042: } else {
1043: if (TRACE) fprintf(stderr,
1.10 timbl 1044: "HTBrowse: No local home document ~/%s or %s\n",
1045: PERSONAL_DEFAULT, LOCAL_DEFAULT_FILE);
1.11 timbl 1046: free(my_home_document);
1047: my_home_document = NULL;
1.2 timbl 1048: }
1049: }
1050: #endif
1.10 timbl 1051: ref = HTParse( my_home_document ? my_home_document :
1052: HTClientHost ? REMOTE_ADDRESS
1053: : LAST_RESORT,
1054: "file:",
1.2 timbl 1055: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.10 timbl 1056: if (my_home_document) {
1.2 timbl 1057: if (TRACE) fprintf(stderr,
1058: "HTAccess: Using custom home page %s i.e. address %s\n",
1.10 timbl 1059: my_home_document, ref);
1060: free(my_home_document);
1.2 timbl 1061: }
1062: anchor = (HTParentAnchor*) HTAnchor_findAddress(ref);
1063: free(ref);
1064: return anchor;
1.1 timbl 1065: }
1.26 frystyk 1066:
1067:
1068: /* Bind an Anchor to the request structure
1069: ** ---------------------------------------
1070: **
1071: ** On Entry,
1072: ** anchor The child or parenet anchor to be binded
1073: ** request The request sturcture
1074: ** On Exit,
1075: ** returns YES Success
1076: ** NO Failure
1077: **
1078: ** Note: Actually the same as HTLoadAnchor() but DOES NOT do the loading
1079: ** Henrik Frystyk 17/02-94
1080: */
1081:
1082: PUBLIC BOOL HTBindAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1083: {
1084: if (!anchor) return NO; /* No link */
1085:
1086: request->anchor = HTAnchor_parent(anchor);
1087: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
1088: : (HTChildAnchor*) anchor;
1089:
1.29 frystyk 1090: return YES;
1.26 frystyk 1091: } /* HTBindAnchor */
1092:
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