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