Annotation of libwww/Library/src/HTAccess.c, revision 1.45
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
1.2 timbl 18: ** Bugs
19: ** This module assumes that that the graphic object is hypertext, as it
1.9 timbl 20: ** needs to select it when it has been loaded. A superclass needs to be
1.2 timbl 21: ** defined which accepts select and select_anchor.
1.1 timbl 22: */
23:
1.9 timbl 24: #ifndef DEFAULT_WAIS_GATEWAY
1.8 timbl 25: #define DEFAULT_WAIS_GATEWAY "http://info.cern.ch:8001/"
1.9 timbl 26: #endif
1.8 timbl 27:
1.1 timbl 28: /* Implements:
29: */
30: #include "HTAccess.h"
31:
32: /* Uses:
33: */
34:
35: #include "HTParse.h"
36: #include "HTUtils.h"
1.4 timbl 37: #include "HTML.h" /* SCW */
1.2 timbl 38:
39: #ifndef NO_RULES
40: #include "HTRules.h"
41: #endif
42:
1.1 timbl 43: #include <stdio.h>
44:
1.2 timbl 45: #include "HTList.h"
46: #include "HText.h" /* See bugs above */
47: #include "HTAlert.h"
1.17 timbl 48: #include "HTFWriter.h" /* for cache stuff */
49: #include "HTTee.h"
1.2 timbl 50:
1.1 timbl 51: /* These flags may be set to modify the operation of this module
52: */
1.34 frystyk 53: PUBLIC char * HTCacheDir = 0; /* Root for cached files or 0 for no cache */
54: PUBLIC char * HTSaveLocallyDir = SAVE_LOCALLY_HOME_DIR; /* Save & exe files */
1.1 timbl 55: PUBLIC char * HTClientHost = 0; /* Name of remote login host if any */
1.42 frystyk 56: PUBLIC FILE * HTlogfile = 0; /* File to which to output one-liners */
1.41 luotonen 57:
1.34 frystyk 58: PUBLIC BOOL HTForceReload = NO; /* Force reload from cache or net */
1.12 timbl 59: PUBLIC BOOL HTSecure = NO; /* Disable access for telnet users? */
1.27 luotonen 60: PUBLIC BOOL using_proxy = NO; /* are we using a proxy gateway? */
1.43 luotonen 61: PUBLIC char * HTImServer = NULL;/* cern_httpd sets this to the translated URL*/
1.27 luotonen 62: PUBLIC BOOL HTImProxy = NO; /* cern_httpd as a proxy? */
1.1 timbl 63:
1.43 luotonen 64:
1.2 timbl 65: /* To generate other things, play with these:
66: */
67:
1.15 timbl 68: /* PUBLIC HTFormat HTOutputFormat = NULL; use request->output_format */
69: /* PUBLIC HTStream* HTOutputStream = NULL; use request->output_stream */
1.1 timbl 70:
71: PRIVATE HTList * protocols = NULL; /* List of registered protocol descriptors */
72:
1.24 timbl 73: /* Superclass defn */
1.1 timbl 74:
1.24 timbl 75: struct _HTStream {
76: HTStreamClass * isa;
77: /* ... */
78: };
79:
1.15 timbl 80: /* Create a request structure
81: ** ---------------------------
82: */
83:
84: PUBLIC HTRequest * HTRequest_new NOARGS
85: {
1.28 luotonen 86: HTRequest * me = (HTRequest*) calloc(1, sizeof(*me)); /* zero fill */
1.15 timbl 87: if (!me) outofmem(__FILE__, "HTRequest_new()");
88:
1.20 luotonen 89: me->conversions = HTList_new(); /* No conversions registerd yet */
90: me->output_format = WWW_PRESENT; /* default it to present to user */
91:
1.15 timbl 92: return me;
93: }
94:
95:
1.20 luotonen 96: /* Delete a request structure
97: ** --------------------------
98: */
99: PUBLIC void HTRequest_delete ARGS1(HTRequest *, req)
100: {
101: if (req) {
1.34 frystyk 102: HTFormatDelete(req->conversions);
103: HTAACleanup(req);
1.37 luotonen 104: FREE(req->from);
1.34 frystyk 105: FREE(req);
1.20 luotonen 106: }
107: }
108:
109:
1.22 luotonen 110: PRIVATE char * method_names[(int)MAX_METHODS + 1] =
111: {
112: "INVALID-METHOD",
113: "GET",
114: "HEAD",
115: "POST",
116: "PUT",
117: "DELETE",
118: "CHECKOUT",
119: "CHECKIN",
120: "SHOWMETHOD",
121: "LINK",
122: "UNLINK",
123: NULL
124: };
125:
126: /* Get method enum value
127: ** ---------------------
128: */
129: PUBLIC HTMethod HTMethod_enum ARGS1(char *, name)
130: {
131: if (name) {
132: int i;
133: for (i=1; i < (int)MAX_METHODS; i++)
134: if (!strcmp(name, method_names[i]))
135: return (HTMethod)i;
136: }
137: return METHOD_INVALID;
138: }
139:
140:
141: /* Get method name
142: ** ---------------
143: */
144: PUBLIC char * HTMethod_name ARGS1(HTMethod, method)
145: {
146: if ((int)method > (int)METHOD_INVALID &&
147: (int)method < (int)MAX_METHODS)
148: return method_names[(int)method];
149: else
150: return method_names[(int)METHOD_INVALID];
151: }
152:
153:
154: /* Is method in a list of method names?
155: ** -----------------------------------
156: */
157: PUBLIC BOOL HTMethod_inList ARGS2(HTMethod, method,
158: HTList *, list)
159: {
160: char * method_name = HTMethod_name(method);
161: HTList *cur = list;
162: char *item;
163:
164: while (NULL != (item = (char*)HTList_nextObject(cur))) {
165: CTRACE(stderr, " %s", item);
166: if (0==strcasecomp(item, method_name))
167: return YES;
168: }
169: return NO; /* Not found */
170: }
171:
172:
173:
174:
1.20 luotonen 175:
1.1 timbl 176: /* Register a Protocol HTRegisterProtocol
177: ** -------------------
178: */
179:
180: PUBLIC BOOL HTRegisterProtocol(protocol)
181: HTProtocol * protocol;
182: {
183: if (!protocols) protocols = HTList_new();
184: HTList_addObject(protocols, protocol);
185: return YES;
186: }
187:
188:
189: /* Register all known protocols
190: ** ----------------------------
191: **
192: ** Add to or subtract from this list if you add or remove protocol modules.
193: ** This routine is called the first time the protocol list is needed,
194: ** unless any protocols are already registered, in which case it is not called.
195: ** Therefore the application can override this list.
196: **
197: ** Compiling with NO_INIT prevents all known protocols from being forced
198: ** in at link time.
199: */
200: #ifndef NO_INIT
201: PRIVATE void HTAccessInit NOARGS /* Call me once */
202: {
1.14 duns 203: GLOBALREF HTProtocol HTTP, HTFile, HTTelnet, HTTn3270, HTRlogin;
1.1 timbl 204: #ifndef DECNET
1.14 duns 205: GLOBALREF HTProtocol HTFTP, HTNews, HTGopher;
1.42 frystyk 206:
207: /* This is the replacement when HTWhoIs gets a complete protocol module */
208: /* GLOBALREF HTProtocol HTFTP, HTNews, HTGopher, HTWhoIs; */
209: /* -------------------------------------------------------------------- */
210:
1.3 timbl 211: #ifdef DIRECT_WAIS
1.14 duns 212: GLOBALREF HTProtocol HTWAIS;
1.3 timbl 213: #endif
1.2 timbl 214: HTRegisterProtocol(&HTFTP);
215: HTRegisterProtocol(&HTNews);
216: HTRegisterProtocol(&HTGopher);
1.42 frystyk 217:
218: /* This should be added when HTWhoIs gets a complete protocol module */
219: /* HTRegisterProtocol(&HTWhoIs); */
220: /* ----------------------------------------------------------------- */
1.3 timbl 221: #ifdef DIRECT_WAIS
222: HTRegisterProtocol(&HTWAIS);
223: #endif
1.1 timbl 224: #endif
225:
1.2 timbl 226: HTRegisterProtocol(&HTTP);
227: HTRegisterProtocol(&HTFile);
228: HTRegisterProtocol(&HTTelnet);
229: HTRegisterProtocol(&HTTn3270);
230: HTRegisterProtocol(&HTRlogin);
1.1 timbl 231: }
232: #endif
233:
234:
1.33 luotonen 235:
236: /* override_proxy()
237: **
238: ** Check the no_proxy environment variable to get the list
239: ** of hosts for which proxy server is not consulted.
240: **
241: ** no_proxy is a comma- or space-separated list of machine
242: ** or domain names, with optional :port part. If no :port
243: ** part is present, it applies to all ports on that domain.
244: **
245: ** Example:
246: ** no_proxy="cern.ch,some.domain:8001"
247: **
248: */
249: PRIVATE BOOL override_proxy ARGS1(CONST char *, addr)
250: {
251: CONST char * no_proxy = getenv("no_proxy");
252: char * p = NULL;
253: char * host = NULL;
254: int port = 0;
255: int h_len = 0;
256:
257: if (!no_proxy || !addr || !(host = HTParse(addr, "", PARSE_HOST)))
258: return NO;
259: if (!*host) { free(host); return NO; }
260:
1.34 frystyk 261: if ((p = strchr(host, ':')) != NULL) { /* Port specified */
1.33 luotonen 262: *p++ = 0; /* Chop off port */
263: port = atoi(p);
264: }
265: else { /* Use default port */
266: char * access = HTParse(addr, "", PARSE_ACCESS);
267: if (access) {
268: if (!strcmp(access,"http")) port = 80;
269: else if (!strcmp(access,"gopher")) port = 70;
270: else if (!strcmp(access,"ftp")) port = 21;
271: free(access);
272: }
273: }
274: if (!port) port = 80; /* Default */
275: h_len = strlen(host);
276:
277: while (*no_proxy) {
278: CONST char * end;
279: CONST char * colon = NULL;
280: int templ_port = 0;
281: int t_len;
282:
283: while (*no_proxy && (WHITE(*no_proxy) || *no_proxy==','))
284: no_proxy++; /* Skip whitespace and separators */
285:
286: end = no_proxy;
287: while (*end && !WHITE(*end) && *end != ',') { /* Find separator */
288: if (*end==':') colon = end; /* Port number given */
289: end++;
290: }
291:
292: if (colon) {
293: templ_port = atoi(colon+1);
294: t_len = colon - no_proxy;
295: }
296: else {
297: t_len = end - no_proxy;
298: }
299:
300: if ((!templ_port || templ_port == port) &&
301: (t_len > 0 && t_len <= h_len &&
302: !strncmp(host + h_len - t_len, no_proxy, t_len))) {
303: free(host);
304: return YES;
305: }
306: if (*end) no_proxy = end+1;
307: else break;
308: }
309:
310: free(host);
311: return NO;
312: }
313:
314:
315:
1.2 timbl 316: /* Find physical name and access protocol
317: ** --------------------------------------
1.1 timbl 318: **
319: **
320: ** On entry,
321: ** addr must point to the fully qualified hypertext reference.
322: ** anchor a pareent anchor with whose address is addr
323: **
324: ** On exit,
1.2 timbl 325: ** returns HT_NO_ACCESS Error has occured.
326: ** HT_OK Success
1.1 timbl 327: **
328: */
1.21 luotonen 329: PRIVATE int get_physical ARGS1(HTRequest *, req)
330: {
1.1 timbl 331: char * access=0; /* Name of access method */
1.21 luotonen 332: char * addr = HTAnchor_address((HTAnchor*)req->anchor); /* free me */
1.27 luotonen 333:
1.35 luotonen 334: /*
335: ** This HACK is here until we have redirection implemented.
336: ** This is used when we are recursively calling HTLoad().
337: ** We then take the physical address, because currently the
338: ** virtual address is kept in a hash table so it can't be
339: ** changed -- otherwise it wouldn't be found anymore.
340: */
1.36 luotonen 341: if (HTAnchor_physical(req->anchor))
342: StrAllocCopy(addr, HTAnchor_physical(req->anchor));
1.35 luotonen 343:
1.2 timbl 344: #ifndef NO_RULES
1.45 ! luotonen 345: if (HTImServer) /* cern_httpd has already done its own translations */
! 346: HTAnchor_setPhysical(req->anchor, HTImServer);
! 347: #ifdef OLD_CODE
1.27 luotonen 348: HTAnchor_setPhysical(req->anchor, addr);
1.45 ! luotonen 349: #endif
1.21 luotonen 350: else {
1.27 luotonen 351: char * physical = HTTranslate(addr);
1.21 luotonen 352: if (!physical) {
353: return HT_FORBIDDEN;
354: }
355: HTAnchor_setPhysical(req->anchor, physical);
356: free(physical); /* free our copy */
1.2 timbl 357: }
358: #else
1.21 luotonen 359: HTAnchor_setPhysical(req->anchor, addr);
1.2 timbl 360: #endif
361:
1.21 luotonen 362: access = HTParse(HTAnchor_physical(req->anchor),
1.27 luotonen 363: "file:", PARSE_ACCESS);
1.1 timbl 364:
365: /* Check whether gateway access has been set up for this
1.8 timbl 366: **
367: ** This function can be replaced by the rule system above.
1.1 timbl 368: */
1.8 timbl 369: #define USE_GATEWAYS
1.1 timbl 370: #ifdef USE_GATEWAYS
1.39 luotonen 371:
372: /* make sure the using_proxy variable is false */
373: using_proxy = NO;
374:
1.33 luotonen 375: if (!override_proxy(addr)) {
1.27 luotonen 376: char * gateway_parameter, *gateway, *proxy;
377:
1.2 timbl 378: gateway_parameter = (char *)malloc(strlen(access)+20);
379: if (gateway_parameter == NULL) outofmem(__FILE__, "HTLoad");
1.27 luotonen 380:
381: /* search for proxy gateways */
1.2 timbl 382: strcpy(gateway_parameter, "WWW_");
383: strcat(gateway_parameter, access);
384: strcat(gateway_parameter, "_GATEWAY");
385: gateway = (char *)getenv(gateway_parameter); /* coerce for decstation */
1.27 luotonen 386:
387: /* search for proxy servers */
388: strcpy(gateway_parameter, access);
389: strcat(gateway_parameter, "_proxy");
390: proxy = (char *)getenv(gateway_parameter);
391:
1.2 timbl 392: free(gateway_parameter);
1.27 luotonen 393:
394: if (TRACE && gateway)
395: fprintf(stderr,"Gateway found: %s\n",gateway);
396: if (TRACE && proxy)
397: fprintf(stderr,"Proxy server found: %s\n",proxy);
398:
1.8 timbl 399: #ifndef DIRECT_WAIS
1.9 timbl 400: if (!gateway && 0==strcmp(access, "wais")) {
1.8 timbl 401: gateway = DEFAULT_WAIS_GATEWAY;
402: }
403: #endif
1.27 luotonen 404:
405: /* proxy servers have precedence over gateway servers */
406: if (proxy) {
407: char * gatewayed=0;
408:
409: StrAllocCopy(gatewayed,proxy);
410: StrAllocCat(gatewayed,addr);
411: using_proxy = YES;
412: HTAnchor_setPhysical(req->anchor, gatewayed);
413: free(gatewayed);
414: free(access);
415:
416: access = HTParse(HTAnchor_physical(req->anchor),
417: "http:", PARSE_ACCESS);
418: } else if (gateway) {
1.9 timbl 419: char * path = HTParse(addr, "",
420: PARSE_HOST + PARSE_PATH + PARSE_PUNCTUATION);
421: /* Chop leading / off to make host into part of path */
422: char * gatewayed = HTParse(path+1, gateway, PARSE_ALL);
423: free(path);
1.21 luotonen 424: HTAnchor_setPhysical(req->anchor, gatewayed);
1.9 timbl 425: free(gatewayed);
1.2 timbl 426: free(access);
1.9 timbl 427:
1.21 luotonen 428: access = HTParse(HTAnchor_physical(req->anchor),
1.8 timbl 429: "http:", PARSE_ACCESS);
1.2 timbl 430: }
431: }
1.1 timbl 432: #endif
433:
1.19 timbl 434: free(addr);
1.1 timbl 435:
436:
437: /* Search registered protocols to find suitable one
438: */
439: {
1.20 luotonen 440: HTList *cur;
441: HTProtocol *p;
1.1 timbl 442: #ifndef NO_INIT
1.2 timbl 443: if (!protocols) HTAccessInit();
1.1 timbl 444: #endif
1.20 luotonen 445: cur = protocols;
446: while ((p = (HTProtocol*)HTList_nextObject(cur))) {
1.2 timbl 447: if (strcmp(p->name, access)==0) {
1.21 luotonen 448: HTAnchor_setProtocol(req->anchor, p);
1.2 timbl 449: free(access);
450: return (HT_OK);
1.1 timbl 451: }
452: }
453: }
454:
455: free(access);
1.2 timbl 456: return HT_NO_ACCESS;
1.1 timbl 457: }
458:
459:
460: /* Load a document
461: ** ---------------
462: **
1.2 timbl 463: ** This is an internal routine, which has an address AND a matching
464: ** anchor. (The public routines are called with one OR the other.)
465: **
466: ** On entry,
1.15 timbl 467: ** request->
1.35 luotonen 468: ** anchor a parent anchor with fully qualified
469: ** hypertext reference as its address set
1.15 timbl 470: ** output_format valid
471: ** output_stream valid on NULL
1.2 timbl 472: **
473: ** On exit,
474: ** returns <0 Error has occured.
475: ** HT_LOADED Success
476: ** HT_NO_DATA Success, but no document loaded.
1.8 timbl 477: ** (telnet sesssion started etc)
1.2 timbl 478: **
479: */
1.35 luotonen 480: PUBLIC int HTLoad ARGS1(HTRequest *, request)
1.2 timbl 481: {
1.25 frystyk 482: char *arg = NULL;
483: HTProtocol *p;
484: int status;
485:
1.22 luotonen 486: if (request->method == METHOD_INVALID)
487: request->method = METHOD_GET;
1.21 luotonen 488: status = get_physical(request);
1.2 timbl 489: if (status == HT_FORBIDDEN) {
1.21 luotonen 490: return HTLoadError(request, 500,
491: "Access forbidden by rule");
1.2 timbl 492: }
493: if (status < 0) return status; /* Can't resolve or forbidden */
1.25 frystyk 494:
495: if(!(arg = HTAnchor_physical(request->anchor)) || !*arg)
496: return (-1);
1.27 luotonen 497:
1.15 timbl 498: p = HTAnchor_protocol(request->anchor);
1.17 timbl 499: return (*(p->load))(request);
1.2 timbl 500: }
501:
502:
503: /* Get a save stream for a document
504: ** --------------------------------
505: */
1.19 timbl 506: PUBLIC HTStream *HTSaveStream ARGS1(HTRequest *, request)
1.15 timbl 507: {
508: HTProtocol * p;
1.19 timbl 509: int status;
1.22 luotonen 510: request->method = METHOD_PUT;
1.21 luotonen 511: status = get_physical(request);
1.19 timbl 512: if (status == HT_FORBIDDEN) {
1.21 luotonen 513: HTLoadError(request, 500,
514: "Access forbidden by rule");
1.19 timbl 515: return NULL; /* should return error status? */
516: }
517: if (status < 0) return NULL; /* @@ error. Can't resolve or forbidden */
518:
1.15 timbl 519: p = HTAnchor_protocol(request->anchor);
1.2 timbl 520: if (!p) return NULL;
521:
1.15 timbl 522: return (*p->saveStream)(request);
1.2 timbl 523:
524: }
525:
526:
527: /* Load a document - with logging etc
528: ** ----------------------------------
529: **
530: ** - Checks or documents already loaded
531: ** - Logs the access
532: ** - Allows stdin filter option
533: ** - Trace ouput and error messages
534: **
1.1 timbl 535: ** On Entry,
1.19 timbl 536: ** request->anchor valid for of the document to be accessed.
537: ** request->childAnchor optional anchor within doc to be selected
538: **
1.2 timbl 539: ** filter if YES, treat stdin as HTML
1.1 timbl 540: **
1.15 timbl 541: ** request->anchor is the node_anchor for the document
542: ** request->output_format is valid
543: **
1.1 timbl 544: ** On Exit,
545: ** returns YES Success in opening document
546: ** NO Failure
547: **
548: */
549:
1.19 timbl 550: PRIVATE BOOL HTLoadDocument ARGS1(HTRequest *, request)
1.1 timbl 551:
552: {
553: int status;
554: HText * text;
1.19 timbl 555: char * full_address = HTAnchor_address((HTAnchor*)request->anchor);
556:
1.1 timbl 557: if (TRACE) fprintf (stderr,
558: "HTAccess: loading document %s\n", full_address);
559:
1.18 timbl 560: request->using_cache = NULL;
561:
1.15 timbl 562: if (!request->output_format) request->output_format = WWW_PRESENT;
1.25 frystyk 563:
1.31 frystyk 564: if (!HTForceReload && (text=(HText *)HTAnchor_document(request->anchor)))
1.15 timbl 565: { /* Already loaded */
1.1 timbl 566: if (TRACE) fprintf(stderr, "HTAccess: Document already in memory.\n");
1.19 timbl 567: if (request->childAnchor) {
568: HText_selectAnchor(text, request->childAnchor);
569: } else {
570: HText_select(text);
571: }
572: free(full_address);
1.1 timbl 573: return YES;
574: }
1.17 timbl 575:
1.34 frystyk 576: /* Check the Cache */
577: /* Caching is ONLY done if (char*) HTCacheDir is set. Henrik 09/03-94 */
1.17 timbl 578: /* Bug: for each format, we only check whether it is ok, we
579: don't check them all and chose the best */
1.38 timbl 580: if (/* HTCacheDir && */ request->anchor->cacheItems) {
1.17 timbl 581: HTList * list = request->anchor->cacheItems;
1.20 luotonen 582: HTList * cur = list;
583: HTCacheItem * item;
584:
585: while ((item = (HTCacheItem*)HTList_nextObject(cur))) {
1.18 timbl 586: HTStream * s;
587:
588: request->using_cache = item;
589:
1.37 luotonen 590: s = HTStreamStack(item->format, request, NO);
1.17 timbl 591: if (s) { /* format was suitable */
592: FILE * fp = fopen(item->filename, "r");
1.18 timbl 593: if (TRACE) fprintf(stderr, "Cache: HIT file %s for %s\n",
1.20 luotonen 594: item->filename,
595: full_address);
1.17 timbl 596: if (fp) {
597: HTFileCopy(fp, s);
1.24 timbl 598: (*s->isa->free)(s); /* close up pipeline */
1.17 timbl 599: fclose(fp);
1.19 timbl 600: free(full_address);
1.17 timbl 601: return YES;
602: } else {
603: fprintf(stderr, "***** Can't read cache file %s !\n",
1.20 luotonen 604: item->filename);
1.17 timbl 605: } /* file open ok */
606: } /* stream ok */
607: } /* next cache item */
608: } /* if cache available for this anchor */
1.1 timbl 609:
1.35 luotonen 610: status = HTLoad(request);
1.2 timbl 611:
612:
1.1 timbl 613: /* Log the access if necessary
614: */
1.42 frystyk 615: if (HTlogfile) {
1.1 timbl 616: time_t theTime;
617: time(&theTime);
1.42 frystyk 618: fprintf(HTlogfile, "%24.24s %s %s %s\n",
1.1 timbl 619: ctime(&theTime),
620: HTClientHost ? HTClientHost : "local",
621: status<0 ? "FAIL" : "GET",
622: full_address);
1.42 frystyk 623: fflush(HTlogfile); /* Actually update it on disk */
1.1 timbl 624: if (TRACE) fprintf(stderr, "Log: %24.24s %s %s %s\n",
625: ctime(&theTime),
626: HTClientHost ? HTClientHost : "local",
627: status<0 ? "FAIL" : "GET",
628: full_address);
629: }
630:
631: if (status == HT_LOADED) {
632: if (TRACE) {
633: fprintf(stderr, "HTAccess: `%s' has been accessed.\n",
634: full_address);
635: }
1.19 timbl 636: free(full_address);
1.1 timbl 637: return YES;
638: }
639:
640: if (status == HT_NO_DATA) {
641: if (TRACE) {
642: fprintf(stderr,
643: "HTAccess: `%s' has been accessed, No data left.\n",
644: full_address);
645: }
1.19 timbl 646: free(full_address);
1.1 timbl 647: return NO;
648: }
649:
1.34 frystyk 650: /* Bug fix thanks to Lou Montulli. Henrik 10/03-94 */
651: if (status<=0) { /* Failure in accessing a document */
1.1 timbl 652: #ifdef CURSES
653: user_message("Can't access `%s'", full_address);
654: #else
1.5 timbl 655: if (TRACE) fprintf(stderr,
656: "HTAccess: Can't access `%s'\n", full_address);
1.1 timbl 657: #endif
1.32 frystyk 658: /* This is done in the specific load procedures... Henrik 07/03-94 */
1.39 luotonen 659: if (request->error_stack)
660: HTLoadError(request, 500, "Unable to access document.");
1.19 timbl 661: free(full_address);
1.1 timbl 662: return NO;
663: }
1.9 timbl 664:
665: /* If you get this, then please find which routine is returning
666: a positive unrecognised error code! */
667:
1.1 timbl 668: fprintf(stderr,
1.2 timbl 669: "**** HTAccess: socket or file number returned by obsolete load routine!\n");
1.9 timbl 670: fprintf(stderr,
1.19 timbl 671: "**** HTAccess: Internal software error. Please mail www-bug@info.cern.ch quoting the version number of this software and the URL: %s!\n",
672: full_address);
673: free(full_address);
674:
1.1 timbl 675: exit(-6996);
1.20 luotonen 676: return NO; /* For gcc :-( */
1.2 timbl 677: } /* HTLoadDocument */
1.1 timbl 678:
679:
680:
681: /* Load a document from absolute name
682: ** ---------------
683: **
684: ** On Entry,
685: ** addr The absolute address of the document to be accessed.
686: ** filter if YES, treat document as HTML
687: **
688: ** On Exit,
689: ** returns YES Success in opening document
690: ** NO Failure
691: **
692: **
693: */
694:
1.15 timbl 695: PUBLIC BOOL HTLoadAbsolute ARGS2(CONST char *,addr, HTRequest*, request)
1.2 timbl 696: {
1.19 timbl 697: HTAnchor * anchor = HTAnchor_findAddress(addr);
698: request->anchor = HTAnchor_parent(anchor);
699: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ?
700: NULL : (HTChildAnchor*) anchor;
701: return HTLoadDocument(request);
1.2 timbl 702: }
703:
704:
705: /* Load a document from absolute name to stream
706: ** --------------------------------------------
707: **
708: ** On Entry,
709: ** addr The absolute address of the document to be accessed.
1.15 timbl 710: ** request->output_stream if non-NULL, send data down this stream
1.2 timbl 711: **
712: ** On Exit,
713: ** returns YES Success in opening document
714: ** NO Failure
715: **
716: **
717: */
718:
719: PUBLIC BOOL HTLoadToStream ARGS3(
720: CONST char *, addr,
721: BOOL, filter,
1.15 timbl 722: HTRequest*, request)
1.1 timbl 723: {
1.19 timbl 724: HTAnchor * anchor = HTAnchor_findAddress(addr);
725: request->anchor = HTAnchor_parent(anchor);
726: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL :
727: (HTChildAnchor*) anchor;
1.15 timbl 728: request->output_stream = request->output_stream;
1.19 timbl 729: return HTLoadDocument(request);
1.1 timbl 730: }
731:
732:
1.2 timbl 733:
734:
1.1 timbl 735: /* Load a document from relative name
736: ** ---------------
737: **
738: ** On Entry,
1.2 timbl 739: ** relative_name The relative address of the document
740: ** to be accessed.
1.1 timbl 741: **
742: ** On Exit,
743: ** returns YES Success in opening document
744: ** NO Failure
745: **
746: **
747: */
748:
1.15 timbl 749: PUBLIC BOOL HTLoadRelative ARGS3(
1.2 timbl 750: CONST char *, relative_name,
1.15 timbl 751: HTParentAnchor *, here,
1.20 luotonen 752: HTRequest *, request)
1.1 timbl 753: {
754: char * full_address = 0;
755: BOOL result;
756: char * mycopy = 0;
757: char * stripped = 0;
758: char * current_address =
1.2 timbl 759: HTAnchor_address((HTAnchor*)here);
1.1 timbl 760:
761: StrAllocCopy(mycopy, relative_name);
762:
763: stripped = HTStrip(mycopy);
764: full_address = HTParse(stripped,
765: current_address,
766: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.15 timbl 767: result = HTLoadAbsolute(full_address, request);
1.1 timbl 768: free(full_address);
769: free(current_address);
770: free(mycopy); /* Memory leak fixed 10/7/92 -- JFG */
771: return result;
772: }
773:
774:
775: /* Load if necessary, and select an anchor
776: ** --------------------------------------
777: **
778: ** On Entry,
779: ** destination The child or parenet anchor to be loaded.
780: **
781: ** On Exit,
782: ** returns YES Success
783: ** NO Failure
784: **
785: */
786:
1.15 timbl 787: PUBLIC BOOL HTLoadAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1.1 timbl 788: {
1.15 timbl 789: if (!anchor) return NO; /* No link */
1.1 timbl 790:
1.15 timbl 791: request->anchor = HTAnchor_parent(anchor);
1.19 timbl 792: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
793: : (HTChildAnchor*) anchor;
1.1 timbl 794:
1.19 timbl 795: return HTLoadDocument(request) ? YES : NO;
1.1 timbl 796:
797: } /* HTLoadAnchor */
798:
799:
800: /* Search
801: ** ------
802: ** Performs a keyword search on word given by the user. Adds the keyword to
803: ** the end of the current address and attempts to open the new address.
804: **
805: ** On Entry,
806: ** *keywords space-separated keyword list or similar search list
1.2 timbl 807: ** here is anchor search is to be done on.
1.1 timbl 808: */
809:
1.2 timbl 810: PRIVATE char hex(i)
811: int i;
812: {
1.13 timbl 813: char * hexchars = "0123456789ABCDEF";
814: return hexchars[i];
1.2 timbl 815: }
1.1 timbl 816:
1.15 timbl 817: PUBLIC BOOL HTSearch ARGS3(
1.2 timbl 818: CONST char *, keywords,
1.15 timbl 819: HTParentAnchor *, here,
820: HTRequest *, request)
1.1 timbl 821: {
1.2 timbl 822:
823: #define acceptable \
824: "1234567890abcdefghijlkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_"
825:
826: char *q, *u;
827: CONST char * p, *s, *e; /* Pointers into keywords */
828: char * address = HTAnchor_address((HTAnchor*)here);
1.1 timbl 829: BOOL result;
1.2 timbl 830: char * escaped = malloc(strlen(keywords)*3+1);
831:
1.29 frystyk 832: /* static CONST BOOL isAcceptable[96] = */
833: /* static AND const is not good for a gnu compiler! Frystyk 25/02-94 */
1.30 luotonen 834: static BOOL isAcceptable[96] =
1.2 timbl 835: /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
836: { 0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0, /* 2x !"#$%&'()*+,-./ */
837: 1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0, /* 3x 0123456789:;<=>? */
838: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 4x @ABCDEFGHIJKLMNO */
839: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1, /* 5X PQRSTUVWXYZ[\]^_ */
840: 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 6x `abcdefghijklmno */
841: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0 }; /* 7X pqrstuvwxyz{\}~ DEL */
842:
843: if (escaped == NULL) outofmem(__FILE__, "HTSearch");
844:
1.29 frystyk 845: /* Convert spaces to + and hex escape unacceptable characters */
1.2 timbl 846:
1.29 frystyk 847: for(s=keywords; *s && WHITE(*s); s++); /*scan */ /* Skip white space */
848: for(e = s + strlen(s); e>s && WHITE(*(e-1)) ; e--); /* Skip trailers */
849: for(q=escaped, p=s; p<e; p++) { /* scan stripped field */
1.2 timbl 850: int c = (int)TOASCII(*p);
851: if (WHITE(*p)) {
852: *q++ = '+';
1.29 frystyk 853: } else if (c>=32 && c<=127 && isAcceptable[c-32] != 0) {
1.13 timbl 854: *q++ = *p; /* 930706 TBL for MVS bug */
1.2 timbl 855: } else {
856: *q++ = '%';
857: *q++ = hex(c / 16);
858: *q++ = hex(c % 16);
859: }
860: } /* Loop over string */
1.1 timbl 861:
1.2 timbl 862: *q=0;
863: /* terminate escaped sctring */
864: u=strchr(address, '?'); /* Find old search string */
865: if (u) *u = 0; /* Chop old search off */
1.1 timbl 866:
867: StrAllocCat(address, "?");
1.2 timbl 868: StrAllocCat(address, escaped);
869: free(escaped);
1.15 timbl 870: result = HTLoadRelative(address, here, request);
1.1 timbl 871: free(address);
1.2 timbl 872:
1.1 timbl 873: return result;
1.2 timbl 874: }
875:
876:
877: /* Search Given Indexname
878: ** ------
879: ** Performs a keyword search on word given by the user. Adds the keyword to
880: ** the end of the current address and attempts to open the new address.
881: **
882: ** On Entry,
883: ** *keywords space-separated keyword list or similar search list
884: ** *addres is name of object search is to be done on.
885: */
886:
1.15 timbl 887: PUBLIC BOOL HTSearchAbsolute ARGS3(
1.2 timbl 888: CONST char *, keywords,
1.15 timbl 889: CONST char *, indexname,
890: HTRequest *, request)
1.2 timbl 891: {
892: HTParentAnchor * anchor =
893: (HTParentAnchor*) HTAnchor_findAddress(indexname);
1.15 timbl 894: return HTSearch(keywords, anchor, request);
1.2 timbl 895: }
896:
897:
898: /* Generate the anchor for the home page
899: ** -------------------------------------
900: **
901: ** As it involves file access, this should only be done once
902: ** when the program first runs.
1.10 timbl 903: ** This is a default algorithm -- browser don't HAVE to use this.
904: ** But consistency betwen browsers is STRONGLY recommended!
1.2 timbl 905: **
1.10 timbl 906: ** Priority order is:
907: **
908: ** 1 WWW_HOME environment variable (logical name, etc)
909: ** 2 ~/WWW/default.html
910: ** 3 /usr/local/bin/default.html
911: ** 4 http://info.cern.ch/default.html
912: **
1.2 timbl 913: */
914: PUBLIC HTParentAnchor * HTHomeAnchor NOARGS
915: {
1.12 timbl 916: char * my_home_document = NULL;
917: char * home = (char *)getenv(LOGICAL_DEFAULT);
1.2 timbl 918: char * ref;
919: HTParentAnchor * anchor;
1.1 timbl 920:
1.12 timbl 921: if (home) {
922: StrAllocCopy(my_home_document, home);
923:
924: /* Someone telnets in, they get a special home.
925: */
926: #define MAX_FILE_NAME 1024 /* @@@ */
927: } else if (HTClientHost) { /* Telnet server */
928: FILE * fp = fopen(REMOTE_POINTER, "r");
929: char * status;
930: if (fp) {
931: my_home_document = (char*) malloc(MAX_FILE_NAME);
932: status = fgets(my_home_document, MAX_FILE_NAME, fp);
933: if (!status) {
934: free(my_home_document);
935: my_home_document = NULL;
936: }
937: fclose(fp);
938: }
939: if (!my_home_document) StrAllocCopy(my_home_document, REMOTE_ADDRESS);
940: }
941:
942:
943:
1.2 timbl 944: #ifdef unix
1.12 timbl 945:
1.10 timbl 946: if (!my_home_document) {
947: FILE * fp = NULL;
948: CONST char * home = (CONST char*)getenv("HOME");
949: if (home) {
950: my_home_document = (char *)malloc(
951: strlen(home)+1+ strlen(PERSONAL_DEFAULT)+1);
952: if (my_home_document == NULL) outofmem(__FILE__, "HTLocalName");
953: sprintf(my_home_document, "%s/%s", home, PERSONAL_DEFAULT);
954: fp = fopen(my_home_document, "r");
955: }
956:
957: if (!fp) {
958: StrAllocCopy(my_home_document, LOCAL_DEFAULT_FILE);
959: fp = fopen(my_home_document, "r");
960: }
1.2 timbl 961: if (fp) {
962: fclose(fp);
963: } else {
964: if (TRACE) fprintf(stderr,
1.10 timbl 965: "HTBrowse: No local home document ~/%s or %s\n",
966: PERSONAL_DEFAULT, LOCAL_DEFAULT_FILE);
1.11 timbl 967: free(my_home_document);
968: my_home_document = NULL;
1.2 timbl 969: }
970: }
971: #endif
1.10 timbl 972: ref = HTParse( my_home_document ? my_home_document :
973: HTClientHost ? REMOTE_ADDRESS
974: : LAST_RESORT,
975: "file:",
1.2 timbl 976: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.10 timbl 977: if (my_home_document) {
1.2 timbl 978: if (TRACE) fprintf(stderr,
979: "HTAccess: Using custom home page %s i.e. address %s\n",
1.10 timbl 980: my_home_document, ref);
981: free(my_home_document);
1.2 timbl 982: }
983: anchor = (HTParentAnchor*) HTAnchor_findAddress(ref);
984: free(ref);
985: return anchor;
1.1 timbl 986: }
1.26 frystyk 987:
988:
989: /* Bind an Anchor to the request structure
990: ** ---------------------------------------
991: **
992: ** On Entry,
993: ** anchor The child or parenet anchor to be binded
994: ** request The request sturcture
995: ** On Exit,
996: ** returns YES Success
997: ** NO Failure
998: **
999: ** Note: Actually the same as HTLoadAnchor() but DOES NOT do the loading
1000: ** Henrik Frystyk 17/02-94
1001: */
1002:
1003: PUBLIC BOOL HTBindAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1004: {
1005: if (!anchor) return NO; /* No link */
1006:
1007: request->anchor = HTAnchor_parent(anchor);
1008: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
1009: : (HTChildAnchor*) anchor;
1010:
1.29 frystyk 1011: return YES;
1.26 frystyk 1012: } /* HTBindAnchor */
1.39 luotonen 1013:
1014:
1015:
1016: /*
1017: * Error diagnostics
1018: */
1019: PUBLIC void HTAddError ARGS2(HTRequest *, req,
1.40 luotonen 1020: CONST char *, msg)
1.39 luotonen 1021: {
1022: HTAddError2(req,msg,NULL);
1023: }
1024:
1025: PUBLIC void HTAddError2 ARGS3(HTRequest *, req,
1.40 luotonen 1026: CONST char *, msg,
1027: CONST char *, param)
1.39 luotonen 1028: {
1029: int mlen = msg ? strlen(msg) : 0;
1030: int plen = param ? strlen(param) : 0;
1031: char * str;
1032:
1033: if (!req) return;
1034: if (!req->error_stack) req->error_stack = HTList_new();
1035:
1036: str = (char*)malloc(mlen + plen + 2);
1037: if (!str) outofmem(__FILE__,"HTAddError2");
1038:
1039: if (msg) strcpy(str,msg);
1040: strcpy(str+mlen," ");
1041: if (param) strcpy(str+mlen+1,param);
1042:
1043: HTList_addObject(req->error_stack, (void*)str);
1044: CTRACE(stderr, "libwww error: %s\n", str);
1045: }
1046:
1047: PUBLIC void HTAddErrorN ARGS3(HTRequest *, req,
1.40 luotonen 1048: CONST char *, msg,
1.39 luotonen 1049: int, num)
1050: {
1051: char buf[20];
1052: sprintf(buf,"%d",num);
1053: HTAddError2(req,msg,buf);
1054: }
1055:
1056: PUBLIC void HTClearErrors ARGS1(HTRequest *, req)
1057: {
1058: if (req && req->error_stack) {
1059: HTList * cur = req->error_stack;
1060: char * str;
1061: while ((str = (char*)HTList_nextObject(cur)))
1062: free(str);
1063: HTList_delete(req->error_stack);
1064: req->error_stack = NULL;
1065: }
1066: }
1.26 frystyk 1067:
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