Annotation of libwww/Library/src/HTAccess.c, revision 1.38
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.
1.19 timbl 16: ** Dec 93 Bug change around, more reentrant, etc
1.2 timbl 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: */
1.34 frystyk 52: PUBLIC char * HTCacheDir = 0; /* Root for cached files or 0 for no cache */
53: PUBLIC char * HTSaveLocallyDir = SAVE_LOCALLY_HOME_DIR; /* Save & exe files */
1.1 timbl 54: PUBLIC char * HTClientHost = 0; /* Name of remote login host if any */
55: PUBLIC FILE * logfile = 0; /* File to which to output one-liners */
1.34 frystyk 56: PUBLIC BOOL HTForceReload = NO; /* Force reload from cache or net */
1.12 timbl 57: PUBLIC BOOL HTSecure = NO; /* Disable access for telnet users? */
1.27 luotonen 58: PUBLIC BOOL using_proxy = NO; /* are we using a proxy gateway? */
59: PUBLIC BOOL HTImServer = NO; /* cern_httpd sets this */
60: PUBLIC BOOL HTImProxy = NO; /* cern_httpd as a proxy? */
1.1 timbl 61:
1.2 timbl 62: /* To generate other things, play with these:
63: */
64:
1.15 timbl 65: /* PUBLIC HTFormat HTOutputFormat = NULL; use request->output_format */
66: /* PUBLIC HTStream* HTOutputStream = NULL; use request->output_stream */
1.1 timbl 67:
68: PRIVATE HTList * protocols = NULL; /* List of registered protocol descriptors */
69:
1.24 timbl 70: /* Superclass defn */
1.1 timbl 71:
1.24 timbl 72: struct _HTStream {
73: HTStreamClass * isa;
74: /* ... */
75: };
76:
1.15 timbl 77: /* Create a request structure
78: ** ---------------------------
79: */
80:
81: PUBLIC HTRequest * HTRequest_new NOARGS
82: {
1.28 luotonen 83: HTRequest * me = (HTRequest*) calloc(1, sizeof(*me)); /* zero fill */
1.15 timbl 84: if (!me) outofmem(__FILE__, "HTRequest_new()");
85:
1.20 luotonen 86: me->conversions = HTList_new(); /* No conversions registerd yet */
87: me->output_format = WWW_PRESENT; /* default it to present to user */
88:
1.15 timbl 89: return me;
90: }
91:
92:
1.20 luotonen 93: /* Delete a request structure
94: ** --------------------------
95: */
96: PUBLIC void HTRequest_delete ARGS1(HTRequest *, req)
97: {
98: if (req) {
1.34 frystyk 99: HTFormatDelete(req->conversions);
100: HTAACleanup(req);
1.37 luotonen 101: FREE(req->from);
1.34 frystyk 102: FREE(req);
1.20 luotonen 103: }
104: }
105:
106:
1.22 luotonen 107: PRIVATE char * method_names[(int)MAX_METHODS + 1] =
108: {
109: "INVALID-METHOD",
110: "GET",
111: "HEAD",
112: "POST",
113: "PUT",
114: "DELETE",
115: "CHECKOUT",
116: "CHECKIN",
117: "SHOWMETHOD",
118: "LINK",
119: "UNLINK",
120: NULL
121: };
122:
123: /* Get method enum value
124: ** ---------------------
125: */
126: PUBLIC HTMethod HTMethod_enum ARGS1(char *, name)
127: {
128: if (name) {
129: int i;
130: for (i=1; i < (int)MAX_METHODS; i++)
131: if (!strcmp(name, method_names[i]))
132: return (HTMethod)i;
133: }
134: return METHOD_INVALID;
135: }
136:
137:
138: /* Get method name
139: ** ---------------
140: */
141: PUBLIC char * HTMethod_name ARGS1(HTMethod, method)
142: {
143: if ((int)method > (int)METHOD_INVALID &&
144: (int)method < (int)MAX_METHODS)
145: return method_names[(int)method];
146: else
147: return method_names[(int)METHOD_INVALID];
148: }
149:
150:
151: /* Is method in a list of method names?
152: ** -----------------------------------
153: */
154: PUBLIC BOOL HTMethod_inList ARGS2(HTMethod, method,
155: HTList *, list)
156: {
157: char * method_name = HTMethod_name(method);
158: HTList *cur = list;
159: char *item;
160:
161: while (NULL != (item = (char*)HTList_nextObject(cur))) {
162: CTRACE(stderr, " %s", item);
163: if (0==strcasecomp(item, method_name))
164: return YES;
165: }
166: return NO; /* Not found */
167: }
168:
169:
170:
171:
1.20 luotonen 172:
1.1 timbl 173: /* Register a Protocol HTRegisterProtocol
174: ** -------------------
175: */
176:
177: PUBLIC BOOL HTRegisterProtocol(protocol)
178: HTProtocol * protocol;
179: {
180: if (!protocols) protocols = HTList_new();
181: HTList_addObject(protocols, protocol);
182: return YES;
183: }
184:
185:
186: /* Register all known protocols
187: ** ----------------------------
188: **
189: ** Add to or subtract from this list if you add or remove protocol modules.
190: ** This routine is called the first time the protocol list is needed,
191: ** unless any protocols are already registered, in which case it is not called.
192: ** Therefore the application can override this list.
193: **
194: ** Compiling with NO_INIT prevents all known protocols from being forced
195: ** in at link time.
196: */
197: #ifndef NO_INIT
198: PRIVATE void HTAccessInit NOARGS /* Call me once */
199: {
1.14 duns 200: GLOBALREF HTProtocol HTTP, HTFile, HTTelnet, HTTn3270, HTRlogin;
1.1 timbl 201: #ifndef DECNET
1.14 duns 202: GLOBALREF HTProtocol HTFTP, HTNews, HTGopher;
1.3 timbl 203: #ifdef DIRECT_WAIS
1.14 duns 204: GLOBALREF HTProtocol HTWAIS;
1.3 timbl 205: #endif
1.2 timbl 206: HTRegisterProtocol(&HTFTP);
207: HTRegisterProtocol(&HTNews);
208: HTRegisterProtocol(&HTGopher);
1.3 timbl 209: #ifdef DIRECT_WAIS
210: HTRegisterProtocol(&HTWAIS);
211: #endif
1.1 timbl 212: #endif
213:
1.2 timbl 214: HTRegisterProtocol(&HTTP);
215: HTRegisterProtocol(&HTFile);
216: HTRegisterProtocol(&HTTelnet);
217: HTRegisterProtocol(&HTTn3270);
218: HTRegisterProtocol(&HTRlogin);
1.1 timbl 219: }
220: #endif
221:
222:
1.33 luotonen 223:
224: /* override_proxy()
225: **
226: ** Check the no_proxy environment variable to get the list
227: ** of hosts for which proxy server is not consulted.
228: **
229: ** no_proxy is a comma- or space-separated list of machine
230: ** or domain names, with optional :port part. If no :port
231: ** part is present, it applies to all ports on that domain.
232: **
233: ** Example:
234: ** no_proxy="cern.ch,some.domain:8001"
235: **
236: */
237: PRIVATE BOOL override_proxy ARGS1(CONST char *, addr)
238: {
239: CONST char * no_proxy = getenv("no_proxy");
240: char * p = NULL;
241: char * host = NULL;
242: int port = 0;
243: int h_len = 0;
244:
245: if (!no_proxy || !addr || !(host = HTParse(addr, "", PARSE_HOST)))
246: return NO;
247: if (!*host) { free(host); return NO; }
248:
1.34 frystyk 249: if ((p = strchr(host, ':')) != NULL) { /* Port specified */
1.33 luotonen 250: *p++ = 0; /* Chop off port */
251: port = atoi(p);
252: }
253: else { /* Use default port */
254: char * access = HTParse(addr, "", PARSE_ACCESS);
255: if (access) {
256: if (!strcmp(access,"http")) port = 80;
257: else if (!strcmp(access,"gopher")) port = 70;
258: else if (!strcmp(access,"ftp")) port = 21;
259: free(access);
260: }
261: }
262: if (!port) port = 80; /* Default */
263: h_len = strlen(host);
264:
265: while (*no_proxy) {
266: CONST char * end;
267: CONST char * colon = NULL;
268: int templ_port = 0;
269: int t_len;
270:
271: while (*no_proxy && (WHITE(*no_proxy) || *no_proxy==','))
272: no_proxy++; /* Skip whitespace and separators */
273:
274: end = no_proxy;
275: while (*end && !WHITE(*end) && *end != ',') { /* Find separator */
276: if (*end==':') colon = end; /* Port number given */
277: end++;
278: }
279:
280: if (colon) {
281: templ_port = atoi(colon+1);
282: t_len = colon - no_proxy;
283: }
284: else {
285: t_len = end - no_proxy;
286: }
287:
288: if ((!templ_port || templ_port == port) &&
289: (t_len > 0 && t_len <= h_len &&
290: !strncmp(host + h_len - t_len, no_proxy, t_len))) {
291: free(host);
292: return YES;
293: }
294: if (*end) no_proxy = end+1;
295: else break;
296: }
297:
298: free(host);
299: return NO;
300: }
301:
302:
303:
1.2 timbl 304: /* Find physical name and access protocol
305: ** --------------------------------------
1.1 timbl 306: **
307: **
308: ** On entry,
309: ** addr must point to the fully qualified hypertext reference.
310: ** anchor a pareent anchor with whose address is addr
311: **
312: ** On exit,
1.2 timbl 313: ** returns HT_NO_ACCESS Error has occured.
314: ** HT_OK Success
1.1 timbl 315: **
316: */
1.21 luotonen 317: PRIVATE int get_physical ARGS1(HTRequest *, req)
318: {
1.1 timbl 319: char * access=0; /* Name of access method */
1.21 luotonen 320: char * addr = HTAnchor_address((HTAnchor*)req->anchor); /* free me */
1.27 luotonen 321:
1.35 luotonen 322: /*
323: ** This HACK is here until we have redirection implemented.
324: ** This is used when we are recursively calling HTLoad().
325: ** We then take the physical address, because currently the
326: ** virtual address is kept in a hash table so it can't be
327: ** changed -- otherwise it wouldn't be found anymore.
328: */
1.36 luotonen 329: if (HTAnchor_physical(req->anchor))
330: StrAllocCopy(addr, HTAnchor_physical(req->anchor));
1.35 luotonen 331:
1.2 timbl 332: #ifndef NO_RULES
1.27 luotonen 333: if (HTImServer) /* cern_httpd has already done its own translations */
334: HTAnchor_setPhysical(req->anchor, addr);
1.21 luotonen 335: else {
1.27 luotonen 336: char * physical = HTTranslate(addr);
1.21 luotonen 337: if (!physical) {
338: free(addr);
339: return HT_FORBIDDEN;
340: }
341: HTAnchor_setPhysical(req->anchor, physical);
342: free(physical); /* free our copy */
1.2 timbl 343: }
344: #else
1.21 luotonen 345: HTAnchor_setPhysical(req->anchor, addr);
1.2 timbl 346: #endif
347:
1.21 luotonen 348: access = HTParse(HTAnchor_physical(req->anchor),
1.27 luotonen 349: "file:", PARSE_ACCESS);
1.1 timbl 350:
351: /* Check whether gateway access has been set up for this
1.8 timbl 352: **
353: ** This function can be replaced by the rule system above.
1.1 timbl 354: */
1.8 timbl 355: #define USE_GATEWAYS
1.1 timbl 356: #ifdef USE_GATEWAYS
1.33 luotonen 357: if (!override_proxy(addr)) {
1.27 luotonen 358: char * gateway_parameter, *gateway, *proxy;
359:
1.2 timbl 360: gateway_parameter = (char *)malloc(strlen(access)+20);
361: if (gateway_parameter == NULL) outofmem(__FILE__, "HTLoad");
1.27 luotonen 362:
363: /* search for proxy gateways */
1.2 timbl 364: strcpy(gateway_parameter, "WWW_");
365: strcat(gateway_parameter, access);
366: strcat(gateway_parameter, "_GATEWAY");
367: gateway = (char *)getenv(gateway_parameter); /* coerce for decstation */
1.27 luotonen 368:
369: /* search for proxy servers */
370: strcpy(gateway_parameter, access);
371: strcat(gateway_parameter, "_proxy");
372: proxy = (char *)getenv(gateway_parameter);
373:
1.2 timbl 374: free(gateway_parameter);
1.27 luotonen 375:
376: if (TRACE && gateway)
377: fprintf(stderr,"Gateway found: %s\n",gateway);
378: if (TRACE && proxy)
379: fprintf(stderr,"Proxy server found: %s\n",proxy);
380:
1.8 timbl 381: #ifndef DIRECT_WAIS
1.9 timbl 382: if (!gateway && 0==strcmp(access, "wais")) {
1.8 timbl 383: gateway = DEFAULT_WAIS_GATEWAY;
384: }
385: #endif
1.27 luotonen 386: /* make sure the using_proxy variable is false */
387: using_proxy = NO;
388:
389: /* proxy servers have precedence over gateway servers */
390: if (proxy) {
391: char * gatewayed=0;
392:
393: StrAllocCopy(gatewayed,proxy);
394: StrAllocCat(gatewayed,addr);
395: using_proxy = YES;
396: HTAnchor_setPhysical(req->anchor, gatewayed);
397: free(gatewayed);
398: free(access);
399:
400: access = HTParse(HTAnchor_physical(req->anchor),
401: "http:", PARSE_ACCESS);
402: } else if (gateway) {
1.9 timbl 403: char * path = HTParse(addr, "",
404: PARSE_HOST + PARSE_PATH + PARSE_PUNCTUATION);
405: /* Chop leading / off to make host into part of path */
406: char * gatewayed = HTParse(path+1, gateway, PARSE_ALL);
407: free(path);
1.21 luotonen 408: HTAnchor_setPhysical(req->anchor, gatewayed);
1.9 timbl 409: free(gatewayed);
1.2 timbl 410: free(access);
1.9 timbl 411:
1.21 luotonen 412: access = HTParse(HTAnchor_physical(req->anchor),
1.8 timbl 413: "http:", PARSE_ACCESS);
1.2 timbl 414: }
415: }
1.1 timbl 416: #endif
417:
1.19 timbl 418: free(addr);
1.1 timbl 419:
420:
421: /* Search registered protocols to find suitable one
422: */
423: {
1.20 luotonen 424: HTList *cur;
425: HTProtocol *p;
1.1 timbl 426: #ifndef NO_INIT
1.2 timbl 427: if (!protocols) HTAccessInit();
1.1 timbl 428: #endif
1.20 luotonen 429: cur = protocols;
430: while ((p = (HTProtocol*)HTList_nextObject(cur))) {
1.2 timbl 431: if (strcmp(p->name, access)==0) {
1.21 luotonen 432: HTAnchor_setProtocol(req->anchor, p);
1.2 timbl 433: free(access);
434: return (HT_OK);
1.1 timbl 435: }
436: }
437: }
438:
439: free(access);
1.2 timbl 440: return HT_NO_ACCESS;
1.1 timbl 441: }
442:
443:
444: /* Load a document
445: ** ---------------
446: **
1.2 timbl 447: ** This is an internal routine, which has an address AND a matching
448: ** anchor. (The public routines are called with one OR the other.)
449: **
450: ** On entry,
1.15 timbl 451: ** request->
1.35 luotonen 452: ** anchor a parent anchor with fully qualified
453: ** hypertext reference as its address set
1.15 timbl 454: ** output_format valid
455: ** output_stream valid on NULL
1.2 timbl 456: **
457: ** On exit,
458: ** returns <0 Error has occured.
459: ** HT_LOADED Success
460: ** HT_NO_DATA Success, but no document loaded.
1.8 timbl 461: ** (telnet sesssion started etc)
1.2 timbl 462: **
463: */
1.35 luotonen 464: PUBLIC int HTLoad ARGS1(HTRequest *, request)
1.2 timbl 465: {
1.25 frystyk 466: char *arg = NULL;
467: HTProtocol *p;
468: int status;
469:
1.22 luotonen 470: if (request->method == METHOD_INVALID)
471: request->method = METHOD_GET;
1.21 luotonen 472: status = get_physical(request);
1.2 timbl 473: if (status == HT_FORBIDDEN) {
1.21 luotonen 474: return HTLoadError(request, 500,
475: "Access forbidden by rule");
1.2 timbl 476: }
477: if (status < 0) return status; /* Can't resolve or forbidden */
1.25 frystyk 478:
479: if(!(arg = HTAnchor_physical(request->anchor)) || !*arg)
480: return (-1);
1.27 luotonen 481:
1.15 timbl 482: p = HTAnchor_protocol(request->anchor);
1.17 timbl 483: return (*(p->load))(request);
1.2 timbl 484: }
485:
486:
487: /* Get a save stream for a document
488: ** --------------------------------
489: */
1.19 timbl 490: PUBLIC HTStream *HTSaveStream ARGS1(HTRequest *, request)
1.15 timbl 491: {
492: HTProtocol * p;
1.19 timbl 493: int status;
1.22 luotonen 494: request->method = METHOD_PUT;
1.21 luotonen 495: status = get_physical(request);
1.19 timbl 496: if (status == HT_FORBIDDEN) {
1.21 luotonen 497: HTLoadError(request, 500,
498: "Access forbidden by rule");
1.19 timbl 499: return NULL; /* should return error status? */
500: }
501: if (status < 0) return NULL; /* @@ error. Can't resolve or forbidden */
502:
1.15 timbl 503: p = HTAnchor_protocol(request->anchor);
1.2 timbl 504: if (!p) return NULL;
505:
1.15 timbl 506: return (*p->saveStream)(request);
1.2 timbl 507:
508: }
509:
510:
511: /* Load a document - with logging etc
512: ** ----------------------------------
513: **
514: ** - Checks or documents already loaded
515: ** - Logs the access
516: ** - Allows stdin filter option
517: ** - Trace ouput and error messages
518: **
1.1 timbl 519: ** On Entry,
1.19 timbl 520: ** request->anchor valid for of the document to be accessed.
521: ** request->childAnchor optional anchor within doc to be selected
522: **
1.2 timbl 523: ** filter if YES, treat stdin as HTML
1.1 timbl 524: **
1.15 timbl 525: ** request->anchor is the node_anchor for the document
526: ** request->output_format is valid
527: **
1.1 timbl 528: ** On Exit,
529: ** returns YES Success in opening document
530: ** NO Failure
531: **
532: */
533:
1.19 timbl 534: PRIVATE BOOL HTLoadDocument ARGS1(HTRequest *, request)
1.1 timbl 535:
536: {
537: int status;
538: HText * text;
1.19 timbl 539: char * full_address = HTAnchor_address((HTAnchor*)request->anchor);
540:
1.1 timbl 541: if (TRACE) fprintf (stderr,
542: "HTAccess: loading document %s\n", full_address);
543:
1.18 timbl 544: request->using_cache = NULL;
545:
1.15 timbl 546: if (!request->output_format) request->output_format = WWW_PRESENT;
1.25 frystyk 547:
1.31 frystyk 548: if (!HTForceReload && (text=(HText *)HTAnchor_document(request->anchor)))
1.15 timbl 549: { /* Already loaded */
1.1 timbl 550: if (TRACE) fprintf(stderr, "HTAccess: Document already in memory.\n");
1.19 timbl 551: if (request->childAnchor) {
552: HText_selectAnchor(text, request->childAnchor);
553: } else {
554: HText_select(text);
555: }
556: free(full_address);
1.1 timbl 557: return YES;
558: }
1.17 timbl 559:
1.34 frystyk 560: /* Check the Cache */
561: /* Caching is ONLY done if (char*) HTCacheDir is set. Henrik 09/03-94 */
1.17 timbl 562: /* Bug: for each format, we only check whether it is ok, we
563: don't check them all and chose the best */
1.38 ! timbl 564: if (/* HTCacheDir && */ request->anchor->cacheItems) {
1.17 timbl 565: HTList * list = request->anchor->cacheItems;
1.20 luotonen 566: HTList * cur = list;
567: HTCacheItem * item;
568:
569: while ((item = (HTCacheItem*)HTList_nextObject(cur))) {
1.18 timbl 570: HTStream * s;
571:
572: request->using_cache = item;
573:
1.37 luotonen 574: s = HTStreamStack(item->format, request, NO);
1.17 timbl 575: if (s) { /* format was suitable */
576: FILE * fp = fopen(item->filename, "r");
1.18 timbl 577: if (TRACE) fprintf(stderr, "Cache: HIT file %s for %s\n",
1.20 luotonen 578: item->filename,
579: full_address);
1.17 timbl 580: if (fp) {
581: HTFileCopy(fp, s);
1.24 timbl 582: (*s->isa->free)(s); /* close up pipeline */
1.17 timbl 583: fclose(fp);
1.19 timbl 584: free(full_address);
1.17 timbl 585: return YES;
586: } else {
587: fprintf(stderr, "***** Can't read cache file %s !\n",
1.20 luotonen 588: item->filename);
1.17 timbl 589: } /* file open ok */
590: } /* stream ok */
591: } /* next cache item */
592: } /* if cache available for this anchor */
1.1 timbl 593:
1.35 luotonen 594: status = HTLoad(request);
1.2 timbl 595:
596:
1.1 timbl 597: /* Log the access if necessary
598: */
599: if (logfile) {
600: time_t theTime;
601: time(&theTime);
602: fprintf(logfile, "%24.24s %s %s %s\n",
603: ctime(&theTime),
604: HTClientHost ? HTClientHost : "local",
605: status<0 ? "FAIL" : "GET",
606: full_address);
607: fflush(logfile); /* Actually update it on disk */
608: if (TRACE) fprintf(stderr, "Log: %24.24s %s %s %s\n",
609: ctime(&theTime),
610: HTClientHost ? HTClientHost : "local",
611: status<0 ? "FAIL" : "GET",
612: full_address);
613: }
614:
615:
616: if (status == HT_LOADED) {
617: if (TRACE) {
618: fprintf(stderr, "HTAccess: `%s' has been accessed.\n",
619: full_address);
620: }
1.19 timbl 621: free(full_address);
1.1 timbl 622: return YES;
623: }
624:
625: if (status == HT_NO_DATA) {
626: if (TRACE) {
627: fprintf(stderr,
628: "HTAccess: `%s' has been accessed, No data left.\n",
629: full_address);
630: }
1.19 timbl 631: free(full_address);
1.1 timbl 632: return NO;
633: }
634:
1.34 frystyk 635: /* Bug fix thanks to Lou Montulli. Henrik 10/03-94 */
636: if (status<=0) { /* Failure in accessing a document */
1.1 timbl 637: #ifdef CURSES
638: user_message("Can't access `%s'", full_address);
639: #else
1.5 timbl 640: if (TRACE) fprintf(stderr,
641: "HTAccess: Can't access `%s'\n", full_address);
1.1 timbl 642: #endif
1.32 frystyk 643: /* This is done in the specific load procedures... Henrik 07/03-94 */
644: /* HTLoadError(request, 500, "Unable to access document."); */
1.19 timbl 645: free(full_address);
1.1 timbl 646: return NO;
647: }
1.9 timbl 648:
649: /* If you get this, then please find which routine is returning
650: a positive unrecognised error code! */
651:
1.1 timbl 652: fprintf(stderr,
1.2 timbl 653: "**** HTAccess: socket or file number returned by obsolete load routine!\n");
1.9 timbl 654: fprintf(stderr,
1.19 timbl 655: "**** HTAccess: Internal software error. Please mail www-bug@info.cern.ch quoting the version number of this software and the URL: %s!\n",
656: full_address);
657: free(full_address);
658:
1.1 timbl 659: exit(-6996);
1.20 luotonen 660: return NO; /* For gcc :-( */
1.2 timbl 661: } /* HTLoadDocument */
1.1 timbl 662:
663:
664:
665: /* Load a document from absolute name
666: ** ---------------
667: **
668: ** On Entry,
669: ** addr The absolute address of the document to be accessed.
670: ** filter if YES, treat document as HTML
671: **
672: ** On Exit,
673: ** returns YES Success in opening document
674: ** NO Failure
675: **
676: **
677: */
678:
1.15 timbl 679: PUBLIC BOOL HTLoadAbsolute ARGS2(CONST char *,addr, HTRequest*, request)
1.2 timbl 680: {
1.19 timbl 681: HTAnchor * anchor = HTAnchor_findAddress(addr);
682: request->anchor = HTAnchor_parent(anchor);
683: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ?
684: NULL : (HTChildAnchor*) anchor;
685: return HTLoadDocument(request);
1.2 timbl 686: }
687:
688:
689: /* Load a document from absolute name to stream
690: ** --------------------------------------------
691: **
692: ** On Entry,
693: ** addr The absolute address of the document to be accessed.
1.15 timbl 694: ** request->output_stream if non-NULL, send data down this stream
1.2 timbl 695: **
696: ** On Exit,
697: ** returns YES Success in opening document
698: ** NO Failure
699: **
700: **
701: */
702:
703: PUBLIC BOOL HTLoadToStream ARGS3(
704: CONST char *, addr,
705: BOOL, filter,
1.15 timbl 706: HTRequest*, request)
1.1 timbl 707: {
1.19 timbl 708: HTAnchor * anchor = HTAnchor_findAddress(addr);
709: request->anchor = HTAnchor_parent(anchor);
710: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL :
711: (HTChildAnchor*) anchor;
1.15 timbl 712: request->output_stream = request->output_stream;
1.19 timbl 713: return HTLoadDocument(request);
1.1 timbl 714: }
715:
716:
1.2 timbl 717:
718:
1.1 timbl 719: /* Load a document from relative name
720: ** ---------------
721: **
722: ** On Entry,
1.2 timbl 723: ** relative_name The relative address of the document
724: ** to be accessed.
1.1 timbl 725: **
726: ** On Exit,
727: ** returns YES Success in opening document
728: ** NO Failure
729: **
730: **
731: */
732:
1.15 timbl 733: PUBLIC BOOL HTLoadRelative ARGS3(
1.2 timbl 734: CONST char *, relative_name,
1.15 timbl 735: HTParentAnchor *, here,
1.20 luotonen 736: HTRequest *, request)
1.1 timbl 737: {
738: char * full_address = 0;
739: BOOL result;
740: char * mycopy = 0;
741: char * stripped = 0;
742: char * current_address =
1.2 timbl 743: HTAnchor_address((HTAnchor*)here);
1.1 timbl 744:
745: StrAllocCopy(mycopy, relative_name);
746:
747: stripped = HTStrip(mycopy);
748: full_address = HTParse(stripped,
749: current_address,
750: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.15 timbl 751: result = HTLoadAbsolute(full_address, request);
1.1 timbl 752: free(full_address);
753: free(current_address);
754: free(mycopy); /* Memory leak fixed 10/7/92 -- JFG */
755: return result;
756: }
757:
758:
759: /* Load if necessary, and select an anchor
760: ** --------------------------------------
761: **
762: ** On Entry,
763: ** destination The child or parenet anchor to be loaded.
764: **
765: ** On Exit,
766: ** returns YES Success
767: ** NO Failure
768: **
769: */
770:
1.15 timbl 771: PUBLIC BOOL HTLoadAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1.1 timbl 772: {
1.15 timbl 773: if (!anchor) return NO; /* No link */
1.1 timbl 774:
1.15 timbl 775: request->anchor = HTAnchor_parent(anchor);
1.19 timbl 776: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
777: : (HTChildAnchor*) anchor;
1.1 timbl 778:
1.19 timbl 779: return HTLoadDocument(request) ? YES : NO;
1.1 timbl 780:
781: } /* HTLoadAnchor */
782:
783:
784: /* Search
785: ** ------
786: ** Performs a keyword search on word given by the user. Adds the keyword to
787: ** the end of the current address and attempts to open the new address.
788: **
789: ** On Entry,
790: ** *keywords space-separated keyword list or similar search list
1.2 timbl 791: ** here is anchor search is to be done on.
1.1 timbl 792: */
793:
1.2 timbl 794: PRIVATE char hex(i)
795: int i;
796: {
1.13 timbl 797: char * hexchars = "0123456789ABCDEF";
798: return hexchars[i];
1.2 timbl 799: }
1.1 timbl 800:
1.15 timbl 801: PUBLIC BOOL HTSearch ARGS3(
1.2 timbl 802: CONST char *, keywords,
1.15 timbl 803: HTParentAnchor *, here,
804: HTRequest *, request)
1.1 timbl 805: {
1.2 timbl 806:
807: #define acceptable \
808: "1234567890abcdefghijlkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_"
809:
810: char *q, *u;
811: CONST char * p, *s, *e; /* Pointers into keywords */
812: char * address = HTAnchor_address((HTAnchor*)here);
1.1 timbl 813: BOOL result;
1.2 timbl 814: char * escaped = malloc(strlen(keywords)*3+1);
815:
1.29 frystyk 816: /* static CONST BOOL isAcceptable[96] = */
817: /* static AND const is not good for a gnu compiler! Frystyk 25/02-94 */
1.30 luotonen 818: static BOOL isAcceptable[96] =
1.2 timbl 819: /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
820: { 0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0, /* 2x !"#$%&'()*+,-./ */
821: 1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0, /* 3x 0123456789:;<=>? */
822: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 4x @ABCDEFGHIJKLMNO */
823: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1, /* 5X PQRSTUVWXYZ[\]^_ */
824: 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 6x `abcdefghijklmno */
825: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0 }; /* 7X pqrstuvwxyz{\}~ DEL */
826:
827: if (escaped == NULL) outofmem(__FILE__, "HTSearch");
828:
1.29 frystyk 829: /* Convert spaces to + and hex escape unacceptable characters */
1.2 timbl 830:
1.29 frystyk 831: for(s=keywords; *s && WHITE(*s); s++); /*scan */ /* Skip white space */
832: for(e = s + strlen(s); e>s && WHITE(*(e-1)) ; e--); /* Skip trailers */
833: for(q=escaped, p=s; p<e; p++) { /* scan stripped field */
1.2 timbl 834: int c = (int)TOASCII(*p);
835: if (WHITE(*p)) {
836: *q++ = '+';
1.29 frystyk 837: } else if (c>=32 && c<=127 && isAcceptable[c-32] != 0) {
1.13 timbl 838: *q++ = *p; /* 930706 TBL for MVS bug */
1.2 timbl 839: } else {
840: *q++ = '%';
841: *q++ = hex(c / 16);
842: *q++ = hex(c % 16);
843: }
844: } /* Loop over string */
1.1 timbl 845:
1.2 timbl 846: *q=0;
847: /* terminate escaped sctring */
848: u=strchr(address, '?'); /* Find old search string */
849: if (u) *u = 0; /* Chop old search off */
1.1 timbl 850:
851: StrAllocCat(address, "?");
1.2 timbl 852: StrAllocCat(address, escaped);
853: free(escaped);
1.15 timbl 854: result = HTLoadRelative(address, here, request);
1.1 timbl 855: free(address);
1.2 timbl 856:
1.1 timbl 857: return result;
1.2 timbl 858: }
859:
860:
861: /* Search Given Indexname
862: ** ------
863: ** Performs a keyword search on word given by the user. Adds the keyword to
864: ** the end of the current address and attempts to open the new address.
865: **
866: ** On Entry,
867: ** *keywords space-separated keyword list or similar search list
868: ** *addres is name of object search is to be done on.
869: */
870:
1.15 timbl 871: PUBLIC BOOL HTSearchAbsolute ARGS3(
1.2 timbl 872: CONST char *, keywords,
1.15 timbl 873: CONST char *, indexname,
874: HTRequest *, request)
1.2 timbl 875: {
876: HTParentAnchor * anchor =
877: (HTParentAnchor*) HTAnchor_findAddress(indexname);
1.15 timbl 878: return HTSearch(keywords, anchor, request);
1.2 timbl 879: }
880:
881:
882: /* Generate the anchor for the home page
883: ** -------------------------------------
884: **
885: ** As it involves file access, this should only be done once
886: ** when the program first runs.
1.10 timbl 887: ** This is a default algorithm -- browser don't HAVE to use this.
888: ** But consistency betwen browsers is STRONGLY recommended!
1.2 timbl 889: **
1.10 timbl 890: ** Priority order is:
891: **
892: ** 1 WWW_HOME environment variable (logical name, etc)
893: ** 2 ~/WWW/default.html
894: ** 3 /usr/local/bin/default.html
895: ** 4 http://info.cern.ch/default.html
896: **
1.2 timbl 897: */
898: PUBLIC HTParentAnchor * HTHomeAnchor NOARGS
899: {
1.12 timbl 900: char * my_home_document = NULL;
901: char * home = (char *)getenv(LOGICAL_DEFAULT);
1.2 timbl 902: char * ref;
903: HTParentAnchor * anchor;
1.1 timbl 904:
1.12 timbl 905: if (home) {
906: StrAllocCopy(my_home_document, home);
907:
908: /* Someone telnets in, they get a special home.
909: */
910: #define MAX_FILE_NAME 1024 /* @@@ */
911: } else if (HTClientHost) { /* Telnet server */
912: FILE * fp = fopen(REMOTE_POINTER, "r");
913: char * status;
914: if (fp) {
915: my_home_document = (char*) malloc(MAX_FILE_NAME);
916: status = fgets(my_home_document, MAX_FILE_NAME, fp);
917: if (!status) {
918: free(my_home_document);
919: my_home_document = NULL;
920: }
921: fclose(fp);
922: }
923: if (!my_home_document) StrAllocCopy(my_home_document, REMOTE_ADDRESS);
924: }
925:
926:
927:
1.2 timbl 928: #ifdef unix
1.12 timbl 929:
1.10 timbl 930: if (!my_home_document) {
931: FILE * fp = NULL;
932: CONST char * home = (CONST char*)getenv("HOME");
933: if (home) {
934: my_home_document = (char *)malloc(
935: strlen(home)+1+ strlen(PERSONAL_DEFAULT)+1);
936: if (my_home_document == NULL) outofmem(__FILE__, "HTLocalName");
937: sprintf(my_home_document, "%s/%s", home, PERSONAL_DEFAULT);
938: fp = fopen(my_home_document, "r");
939: }
940:
941: if (!fp) {
942: StrAllocCopy(my_home_document, LOCAL_DEFAULT_FILE);
943: fp = fopen(my_home_document, "r");
944: }
1.2 timbl 945: if (fp) {
946: fclose(fp);
947: } else {
948: if (TRACE) fprintf(stderr,
1.10 timbl 949: "HTBrowse: No local home document ~/%s or %s\n",
950: PERSONAL_DEFAULT, LOCAL_DEFAULT_FILE);
1.11 timbl 951: free(my_home_document);
952: my_home_document = NULL;
1.2 timbl 953: }
954: }
955: #endif
1.10 timbl 956: ref = HTParse( my_home_document ? my_home_document :
957: HTClientHost ? REMOTE_ADDRESS
958: : LAST_RESORT,
959: "file:",
1.2 timbl 960: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.10 timbl 961: if (my_home_document) {
1.2 timbl 962: if (TRACE) fprintf(stderr,
963: "HTAccess: Using custom home page %s i.e. address %s\n",
1.10 timbl 964: my_home_document, ref);
965: free(my_home_document);
1.2 timbl 966: }
967: anchor = (HTParentAnchor*) HTAnchor_findAddress(ref);
968: free(ref);
969: return anchor;
1.1 timbl 970: }
1.26 frystyk 971:
972:
973: /* Bind an Anchor to the request structure
974: ** ---------------------------------------
975: **
976: ** On Entry,
977: ** anchor The child or parenet anchor to be binded
978: ** request The request sturcture
979: ** On Exit,
980: ** returns YES Success
981: ** NO Failure
982: **
983: ** Note: Actually the same as HTLoadAnchor() but DOES NOT do the loading
984: ** Henrik Frystyk 17/02-94
985: */
986:
987: PUBLIC BOOL HTBindAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
988: {
989: if (!anchor) return NO; /* No link */
990:
991: request->anchor = HTAnchor_parent(anchor);
992: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
993: : (HTChildAnchor*) anchor;
994:
1.29 frystyk 995: return YES;
1.26 frystyk 996: } /* HTBindAnchor */
997:
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