Annotation of libwww/Library/src/HTAccess.c, revision 1.47
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"
1.46 frystyk 50: #include "HTError.h"
1.2 timbl 51:
1.1 timbl 52: /* These flags may be set to modify the operation of this module
53: */
1.34 frystyk 54: PUBLIC char * HTCacheDir = 0; /* Root for cached files or 0 for no cache */
55: PUBLIC char * HTSaveLocallyDir = SAVE_LOCALLY_HOME_DIR; /* Save & exe files */
1.1 timbl 56: PUBLIC char * HTClientHost = 0; /* Name of remote login host if any */
1.42 frystyk 57: PUBLIC FILE * HTlogfile = 0; /* File to which to output one-liners */
1.41 luotonen 58:
1.34 frystyk 59: PUBLIC BOOL HTForceReload = NO; /* Force reload from cache or net */
1.12 timbl 60: PUBLIC BOOL HTSecure = NO; /* Disable access for telnet users? */
1.27 luotonen 61: PUBLIC BOOL using_proxy = NO; /* are we using a proxy gateway? */
1.43 luotonen 62: PUBLIC char * HTImServer = NULL;/* cern_httpd sets this to the translated URL*/
1.27 luotonen 63: PUBLIC BOOL HTImProxy = NO; /* cern_httpd as a proxy? */
1.1 timbl 64:
1.43 luotonen 65:
1.2 timbl 66: /* To generate other things, play with these:
67: */
68:
1.15 timbl 69: /* PUBLIC HTFormat HTOutputFormat = NULL; use request->output_format */
70: /* PUBLIC HTStream* HTOutputStream = NULL; use request->output_stream */
1.1 timbl 71:
72: PRIVATE HTList * protocols = NULL; /* List of registered protocol descriptors */
73:
1.24 timbl 74: /* Superclass defn */
1.1 timbl 75:
1.24 timbl 76: struct _HTStream {
77: HTStreamClass * isa;
78: /* ... */
79: };
80:
1.15 timbl 81: /* Create a request structure
82: ** ---------------------------
83: */
84:
85: PUBLIC HTRequest * HTRequest_new NOARGS
86: {
1.28 luotonen 87: HTRequest * me = (HTRequest*) calloc(1, sizeof(*me)); /* zero fill */
1.15 timbl 88: if (!me) outofmem(__FILE__, "HTRequest_new()");
89:
1.20 luotonen 90: me->conversions = HTList_new(); /* No conversions registerd yet */
91: me->output_format = WWW_PRESENT; /* default it to present to user */
92:
1.15 timbl 93: return me;
94: }
95:
96:
1.20 luotonen 97: /* Delete a request structure
98: ** --------------------------
99: */
100: PUBLIC void HTRequest_delete ARGS1(HTRequest *, req)
101: {
102: if (req) {
1.34 frystyk 103: HTFormatDelete(req->conversions);
1.46 frystyk 104: HTErrorFree(req);
1.34 frystyk 105: HTAACleanup(req);
1.37 luotonen 106: FREE(req->from);
1.34 frystyk 107: FREE(req);
1.20 luotonen 108: }
109: }
110:
111:
1.22 luotonen 112: PRIVATE char * method_names[(int)MAX_METHODS + 1] =
113: {
114: "INVALID-METHOD",
115: "GET",
116: "HEAD",
117: "POST",
118: "PUT",
119: "DELETE",
120: "CHECKOUT",
121: "CHECKIN",
122: "SHOWMETHOD",
123: "LINK",
124: "UNLINK",
125: NULL
126: };
127:
128: /* Get method enum value
129: ** ---------------------
130: */
131: PUBLIC HTMethod HTMethod_enum ARGS1(char *, name)
132: {
133: if (name) {
134: int i;
135: for (i=1; i < (int)MAX_METHODS; i++)
136: if (!strcmp(name, method_names[i]))
137: return (HTMethod)i;
138: }
139: return METHOD_INVALID;
140: }
141:
142:
143: /* Get method name
144: ** ---------------
145: */
146: PUBLIC char * HTMethod_name ARGS1(HTMethod, method)
147: {
148: if ((int)method > (int)METHOD_INVALID &&
149: (int)method < (int)MAX_METHODS)
150: return method_names[(int)method];
151: else
152: return method_names[(int)METHOD_INVALID];
153: }
154:
155:
156: /* Is method in a list of method names?
157: ** -----------------------------------
158: */
159: PUBLIC BOOL HTMethod_inList ARGS2(HTMethod, method,
160: HTList *, list)
161: {
162: char * method_name = HTMethod_name(method);
163: HTList *cur = list;
164: char *item;
165:
166: while (NULL != (item = (char*)HTList_nextObject(cur))) {
167: CTRACE(stderr, " %s", item);
168: if (0==strcasecomp(item, method_name))
169: return YES;
170: }
171: return NO; /* Not found */
172: }
173:
174:
175:
176:
1.20 luotonen 177:
1.1 timbl 178: /* Register a Protocol HTRegisterProtocol
179: ** -------------------
180: */
181:
182: PUBLIC BOOL HTRegisterProtocol(protocol)
183: HTProtocol * protocol;
184: {
185: if (!protocols) protocols = HTList_new();
186: HTList_addObject(protocols, protocol);
187: return YES;
188: }
189:
190:
191: /* Register all known protocols
192: ** ----------------------------
193: **
194: ** Add to or subtract from this list if you add or remove protocol modules.
195: ** This routine is called the first time the protocol list is needed,
196: ** unless any protocols are already registered, in which case it is not called.
197: ** Therefore the application can override this list.
198: **
199: ** Compiling with NO_INIT prevents all known protocols from being forced
200: ** in at link time.
201: */
202: #ifndef NO_INIT
203: PRIVATE void HTAccessInit NOARGS /* Call me once */
204: {
1.14 duns 205: GLOBALREF HTProtocol HTTP, HTFile, HTTelnet, HTTn3270, HTRlogin;
1.1 timbl 206: #ifndef DECNET
1.14 duns 207: GLOBALREF HTProtocol HTFTP, HTNews, HTGopher;
1.42 frystyk 208:
209: /* This is the replacement when HTWhoIs gets a complete protocol module */
210: /* GLOBALREF HTProtocol HTFTP, HTNews, HTGopher, HTWhoIs; */
211: /* -------------------------------------------------------------------- */
212:
1.3 timbl 213: #ifdef DIRECT_WAIS
1.14 duns 214: GLOBALREF HTProtocol HTWAIS;
1.3 timbl 215: #endif
1.2 timbl 216: HTRegisterProtocol(&HTFTP);
217: HTRegisterProtocol(&HTNews);
218: HTRegisterProtocol(&HTGopher);
1.42 frystyk 219:
220: /* This should be added when HTWhoIs gets a complete protocol module */
221: /* HTRegisterProtocol(&HTWhoIs); */
222: /* ----------------------------------------------------------------- */
1.3 timbl 223: #ifdef DIRECT_WAIS
224: HTRegisterProtocol(&HTWAIS);
225: #endif
1.1 timbl 226: #endif
227:
1.2 timbl 228: HTRegisterProtocol(&HTTP);
229: HTRegisterProtocol(&HTFile);
230: HTRegisterProtocol(&HTTelnet);
231: HTRegisterProtocol(&HTTn3270);
232: HTRegisterProtocol(&HTRlogin);
1.1 timbl 233: }
234: #endif
235:
236:
1.33 luotonen 237:
238: /* override_proxy()
239: **
240: ** Check the no_proxy environment variable to get the list
241: ** of hosts for which proxy server is not consulted.
242: **
243: ** no_proxy is a comma- or space-separated list of machine
244: ** or domain names, with optional :port part. If no :port
245: ** part is present, it applies to all ports on that domain.
246: **
247: ** Example:
248: ** no_proxy="cern.ch,some.domain:8001"
249: **
250: */
251: PRIVATE BOOL override_proxy ARGS1(CONST char *, addr)
252: {
253: CONST char * no_proxy = getenv("no_proxy");
254: char * p = NULL;
255: char * host = NULL;
256: int port = 0;
257: int h_len = 0;
258:
259: if (!no_proxy || !addr || !(host = HTParse(addr, "", PARSE_HOST)))
260: return NO;
261: if (!*host) { free(host); return NO; }
262:
1.34 frystyk 263: if ((p = strchr(host, ':')) != NULL) { /* Port specified */
1.33 luotonen 264: *p++ = 0; /* Chop off port */
265: port = atoi(p);
266: }
267: else { /* Use default port */
268: char * access = HTParse(addr, "", PARSE_ACCESS);
269: if (access) {
270: if (!strcmp(access,"http")) port = 80;
271: else if (!strcmp(access,"gopher")) port = 70;
272: else if (!strcmp(access,"ftp")) port = 21;
273: free(access);
274: }
275: }
276: if (!port) port = 80; /* Default */
277: h_len = strlen(host);
278:
279: while (*no_proxy) {
280: CONST char * end;
281: CONST char * colon = NULL;
282: int templ_port = 0;
283: int t_len;
284:
285: while (*no_proxy && (WHITE(*no_proxy) || *no_proxy==','))
286: no_proxy++; /* Skip whitespace and separators */
287:
288: end = no_proxy;
289: while (*end && !WHITE(*end) && *end != ',') { /* Find separator */
290: if (*end==':') colon = end; /* Port number given */
291: end++;
292: }
293:
294: if (colon) {
295: templ_port = atoi(colon+1);
296: t_len = colon - no_proxy;
297: }
298: else {
299: t_len = end - no_proxy;
300: }
301:
302: if ((!templ_port || templ_port == port) &&
303: (t_len > 0 && t_len <= h_len &&
304: !strncmp(host + h_len - t_len, no_proxy, t_len))) {
305: free(host);
306: return YES;
307: }
308: if (*end) no_proxy = end+1;
309: else break;
310: }
311:
312: free(host);
313: return NO;
314: }
315:
316:
317:
1.2 timbl 318: /* Find physical name and access protocol
319: ** --------------------------------------
1.1 timbl 320: **
321: **
322: ** On entry,
323: ** addr must point to the fully qualified hypertext reference.
324: ** anchor a pareent anchor with whose address is addr
325: **
326: ** On exit,
1.2 timbl 327: ** returns HT_NO_ACCESS Error has occured.
328: ** HT_OK Success
1.1 timbl 329: **
330: */
1.21 luotonen 331: PRIVATE int get_physical ARGS1(HTRequest *, req)
332: {
1.1 timbl 333: char * access=0; /* Name of access method */
1.21 luotonen 334: char * addr = HTAnchor_address((HTAnchor*)req->anchor); /* free me */
1.27 luotonen 335:
1.35 luotonen 336: /*
337: ** This HACK is here until we have redirection implemented.
338: ** This is used when we are recursively calling HTLoad().
339: ** We then take the physical address, because currently the
340: ** virtual address is kept in a hash table so it can't be
341: ** changed -- otherwise it wouldn't be found anymore.
342: */
1.36 luotonen 343: if (HTAnchor_physical(req->anchor))
344: StrAllocCopy(addr, HTAnchor_physical(req->anchor));
1.35 luotonen 345:
1.2 timbl 346: #ifndef NO_RULES
1.47 ! luotonen 347: if (HTImServer) { /* cern_httpd has already done its own translations */
1.45 luotonen 348: HTAnchor_setPhysical(req->anchor, HTImServer);
1.47 ! luotonen 349: StrAllocCopy(addr, HTImServer); /* Oops, queries thru many proxies */
! 350: /* didn't work without this -- AL */
! 351: }
1.21 luotonen 352: else {
1.27 luotonen 353: char * physical = HTTranslate(addr);
1.21 luotonen 354: if (!physical) {
1.47 ! luotonen 355: free(addr);
1.21 luotonen 356: return HT_FORBIDDEN;
357: }
358: HTAnchor_setPhysical(req->anchor, physical);
359: free(physical); /* free our copy */
1.2 timbl 360: }
361: #else
1.21 luotonen 362: HTAnchor_setPhysical(req->anchor, addr);
1.2 timbl 363: #endif
364:
1.21 luotonen 365: access = HTParse(HTAnchor_physical(req->anchor),
1.27 luotonen 366: "file:", PARSE_ACCESS);
1.1 timbl 367:
368: /* Check whether gateway access has been set up for this
1.8 timbl 369: **
370: ** This function can be replaced by the rule system above.
1.1 timbl 371: */
1.8 timbl 372: #define USE_GATEWAYS
1.1 timbl 373: #ifdef USE_GATEWAYS
1.39 luotonen 374:
375: /* make sure the using_proxy variable is false */
376: using_proxy = NO;
377:
1.33 luotonen 378: if (!override_proxy(addr)) {
1.27 luotonen 379: char * gateway_parameter, *gateway, *proxy;
380:
1.2 timbl 381: gateway_parameter = (char *)malloc(strlen(access)+20);
382: if (gateway_parameter == NULL) outofmem(__FILE__, "HTLoad");
1.27 luotonen 383:
384: /* search for proxy gateways */
1.2 timbl 385: strcpy(gateway_parameter, "WWW_");
386: strcat(gateway_parameter, access);
387: strcat(gateway_parameter, "_GATEWAY");
388: gateway = (char *)getenv(gateway_parameter); /* coerce for decstation */
1.27 luotonen 389:
390: /* search for proxy servers */
391: strcpy(gateway_parameter, access);
392: strcat(gateway_parameter, "_proxy");
393: proxy = (char *)getenv(gateway_parameter);
394:
1.2 timbl 395: free(gateway_parameter);
1.27 luotonen 396:
397: if (TRACE && gateway)
398: fprintf(stderr,"Gateway found: %s\n",gateway);
399: if (TRACE && proxy)
400: fprintf(stderr,"Proxy server found: %s\n",proxy);
401:
1.8 timbl 402: #ifndef DIRECT_WAIS
1.9 timbl 403: if (!gateway && 0==strcmp(access, "wais")) {
1.8 timbl 404: gateway = DEFAULT_WAIS_GATEWAY;
405: }
406: #endif
1.27 luotonen 407:
408: /* proxy servers have precedence over gateway servers */
409: if (proxy) {
410: char * gatewayed=0;
411:
412: StrAllocCopy(gatewayed,proxy);
413: StrAllocCat(gatewayed,addr);
414: using_proxy = YES;
415: HTAnchor_setPhysical(req->anchor, gatewayed);
416: free(gatewayed);
417: free(access);
418:
419: access = HTParse(HTAnchor_physical(req->anchor),
420: "http:", PARSE_ACCESS);
421: } else if (gateway) {
1.9 timbl 422: char * path = HTParse(addr, "",
423: PARSE_HOST + PARSE_PATH + PARSE_PUNCTUATION);
424: /* Chop leading / off to make host into part of path */
425: char * gatewayed = HTParse(path+1, gateway, PARSE_ALL);
426: free(path);
1.21 luotonen 427: HTAnchor_setPhysical(req->anchor, gatewayed);
1.9 timbl 428: free(gatewayed);
1.2 timbl 429: free(access);
1.9 timbl 430:
1.21 luotonen 431: access = HTParse(HTAnchor_physical(req->anchor),
1.8 timbl 432: "http:", PARSE_ACCESS);
1.2 timbl 433: }
434: }
1.1 timbl 435: #endif
436:
1.19 timbl 437: free(addr);
1.1 timbl 438:
439:
440: /* Search registered protocols to find suitable one
441: */
442: {
1.20 luotonen 443: HTList *cur;
444: HTProtocol *p;
1.1 timbl 445: #ifndef NO_INIT
1.2 timbl 446: if (!protocols) HTAccessInit();
1.1 timbl 447: #endif
1.20 luotonen 448: cur = protocols;
449: while ((p = (HTProtocol*)HTList_nextObject(cur))) {
1.2 timbl 450: if (strcmp(p->name, access)==0) {
1.21 luotonen 451: HTAnchor_setProtocol(req->anchor, p);
1.2 timbl 452: free(access);
453: return (HT_OK);
1.1 timbl 454: }
455: }
456: }
457:
458: free(access);
1.2 timbl 459: return HT_NO_ACCESS;
1.1 timbl 460: }
461:
462:
463: /* Load a document
464: ** ---------------
465: **
1.2 timbl 466: ** This is an internal routine, which has an address AND a matching
467: ** anchor. (The public routines are called with one OR the other.)
468: **
469: ** On entry,
1.15 timbl 470: ** request->
1.35 luotonen 471: ** anchor a parent anchor with fully qualified
472: ** hypertext reference as its address set
1.15 timbl 473: ** output_format valid
474: ** output_stream valid on NULL
1.2 timbl 475: **
476: ** On exit,
477: ** returns <0 Error has occured.
478: ** HT_LOADED Success
479: ** HT_NO_DATA Success, but no document loaded.
1.8 timbl 480: ** (telnet sesssion started etc)
1.2 timbl 481: **
482: */
1.35 luotonen 483: PUBLIC int HTLoad ARGS1(HTRequest *, request)
1.2 timbl 484: {
1.25 frystyk 485: char *arg = NULL;
486: HTProtocol *p;
487: int status;
488:
1.22 luotonen 489: if (request->method == METHOD_INVALID)
490: request->method = METHOD_GET;
1.21 luotonen 491: status = get_physical(request);
1.2 timbl 492: if (status == HT_FORBIDDEN) {
1.21 luotonen 493: return HTLoadError(request, 500,
494: "Access forbidden by rule");
1.2 timbl 495: }
496: if (status < 0) return status; /* Can't resolve or forbidden */
1.25 frystyk 497:
498: if(!(arg = HTAnchor_physical(request->anchor)) || !*arg)
499: return (-1);
1.27 luotonen 500:
1.15 timbl 501: p = HTAnchor_protocol(request->anchor);
1.17 timbl 502: return (*(p->load))(request);
1.2 timbl 503: }
504:
505:
506: /* Get a save stream for a document
507: ** --------------------------------
508: */
1.19 timbl 509: PUBLIC HTStream *HTSaveStream ARGS1(HTRequest *, request)
1.15 timbl 510: {
511: HTProtocol * p;
1.19 timbl 512: int status;
1.22 luotonen 513: request->method = METHOD_PUT;
1.21 luotonen 514: status = get_physical(request);
1.19 timbl 515: if (status == HT_FORBIDDEN) {
1.21 luotonen 516: HTLoadError(request, 500,
517: "Access forbidden by rule");
1.19 timbl 518: return NULL; /* should return error status? */
519: }
520: if (status < 0) return NULL; /* @@ error. Can't resolve or forbidden */
521:
1.15 timbl 522: p = HTAnchor_protocol(request->anchor);
1.2 timbl 523: if (!p) return NULL;
524:
1.15 timbl 525: return (*p->saveStream)(request);
1.2 timbl 526:
527: }
528:
529:
530: /* Load a document - with logging etc
531: ** ----------------------------------
532: **
533: ** - Checks or documents already loaded
534: ** - Logs the access
535: ** - Allows stdin filter option
536: ** - Trace ouput and error messages
537: **
1.1 timbl 538: ** On Entry,
1.19 timbl 539: ** request->anchor valid for of the document to be accessed.
540: ** request->childAnchor optional anchor within doc to be selected
541: **
1.2 timbl 542: ** filter if YES, treat stdin as HTML
1.1 timbl 543: **
1.15 timbl 544: ** request->anchor is the node_anchor for the document
545: ** request->output_format is valid
546: **
1.1 timbl 547: ** On Exit,
548: ** returns YES Success in opening document
549: ** NO Failure
550: **
551: */
552:
1.19 timbl 553: PRIVATE BOOL HTLoadDocument ARGS1(HTRequest *, request)
1.1 timbl 554:
555: {
556: int status;
557: HText * text;
1.19 timbl 558: char * full_address = HTAnchor_address((HTAnchor*)request->anchor);
559:
1.1 timbl 560: if (TRACE) fprintf (stderr,
561: "HTAccess: loading document %s\n", full_address);
562:
1.18 timbl 563: request->using_cache = NULL;
564:
1.15 timbl 565: if (!request->output_format) request->output_format = WWW_PRESENT;
1.25 frystyk 566:
1.31 frystyk 567: if (!HTForceReload && (text=(HText *)HTAnchor_document(request->anchor)))
1.15 timbl 568: { /* Already loaded */
1.1 timbl 569: if (TRACE) fprintf(stderr, "HTAccess: Document already in memory.\n");
1.19 timbl 570: if (request->childAnchor) {
571: HText_selectAnchor(text, request->childAnchor);
572: } else {
573: HText_select(text);
574: }
575: free(full_address);
1.1 timbl 576: return YES;
577: }
1.17 timbl 578:
1.34 frystyk 579: /* Check the Cache */
580: /* Caching is ONLY done if (char*) HTCacheDir is set. Henrik 09/03-94 */
1.17 timbl 581: /* Bug: for each format, we only check whether it is ok, we
582: don't check them all and chose the best */
1.38 timbl 583: if (/* HTCacheDir && */ request->anchor->cacheItems) {
1.17 timbl 584: HTList * list = request->anchor->cacheItems;
1.20 luotonen 585: HTList * cur = list;
586: HTCacheItem * item;
587:
588: while ((item = (HTCacheItem*)HTList_nextObject(cur))) {
1.18 timbl 589: HTStream * s;
590:
591: request->using_cache = item;
592:
1.37 luotonen 593: s = HTStreamStack(item->format, request, NO);
1.17 timbl 594: if (s) { /* format was suitable */
595: FILE * fp = fopen(item->filename, "r");
1.18 timbl 596: if (TRACE) fprintf(stderr, "Cache: HIT file %s for %s\n",
1.20 luotonen 597: item->filename,
598: full_address);
1.17 timbl 599: if (fp) {
600: HTFileCopy(fp, s);
1.24 timbl 601: (*s->isa->free)(s); /* close up pipeline */
1.17 timbl 602: fclose(fp);
1.19 timbl 603: free(full_address);
1.17 timbl 604: return YES;
605: } else {
606: fprintf(stderr, "***** Can't read cache file %s !\n",
1.20 luotonen 607: item->filename);
1.17 timbl 608: } /* file open ok */
609: } /* stream ok */
610: } /* next cache item */
611: } /* if cache available for this anchor */
1.1 timbl 612:
1.35 luotonen 613: status = HTLoad(request);
1.2 timbl 614:
615:
1.1 timbl 616: /* Log the access if necessary
617: */
1.42 frystyk 618: if (HTlogfile) {
1.1 timbl 619: time_t theTime;
620: time(&theTime);
1.42 frystyk 621: fprintf(HTlogfile, "%24.24s %s %s %s\n",
1.1 timbl 622: ctime(&theTime),
623: HTClientHost ? HTClientHost : "local",
624: status<0 ? "FAIL" : "GET",
625: full_address);
1.42 frystyk 626: fflush(HTlogfile); /* Actually update it on disk */
1.1 timbl 627: if (TRACE) fprintf(stderr, "Log: %24.24s %s %s %s\n",
628: ctime(&theTime),
629: HTClientHost ? HTClientHost : "local",
630: status<0 ? "FAIL" : "GET",
631: full_address);
632: }
633:
634: if (status == HT_LOADED) {
635: if (TRACE) {
636: fprintf(stderr, "HTAccess: `%s' has been accessed.\n",
637: full_address);
638: }
1.19 timbl 639: free(full_address);
1.1 timbl 640: return YES;
641: }
642:
643: if (status == HT_NO_DATA) {
644: if (TRACE) {
645: fprintf(stderr,
646: "HTAccess: `%s' has been accessed, No data left.\n",
647: full_address);
648: }
1.19 timbl 649: free(full_address);
1.1 timbl 650: return NO;
651: }
652:
1.34 frystyk 653: /* Bug fix thanks to Lou Montulli. Henrik 10/03-94 */
654: if (status<=0) { /* Failure in accessing a document */
1.1 timbl 655: #ifdef CURSES
656: user_message("Can't access `%s'", full_address);
657: #else
1.5 timbl 658: if (TRACE) fprintf(stderr,
659: "HTAccess: Can't access `%s'\n", full_address);
1.1 timbl 660: #endif
1.32 frystyk 661: /* This is done in the specific load procedures... Henrik 07/03-94 */
1.47 ! luotonen 662: if (request->old_error_stack)
1.39 luotonen 663: HTLoadError(request, 500, "Unable to access document.");
1.19 timbl 664: free(full_address);
1.1 timbl 665: return NO;
666: }
1.9 timbl 667:
668: /* If you get this, then please find which routine is returning
669: a positive unrecognised error code! */
670:
1.1 timbl 671: fprintf(stderr,
1.2 timbl 672: "**** HTAccess: socket or file number returned by obsolete load routine!\n");
1.9 timbl 673: fprintf(stderr,
1.19 timbl 674: "**** HTAccess: Internal software error. Please mail www-bug@info.cern.ch quoting the version number of this software and the URL: %s!\n",
675: full_address);
676: free(full_address);
677:
1.1 timbl 678: exit(-6996);
1.20 luotonen 679: return NO; /* For gcc :-( */
1.2 timbl 680: } /* HTLoadDocument */
1.1 timbl 681:
682:
683:
684: /* Load a document from absolute name
685: ** ---------------
686: **
687: ** On Entry,
688: ** addr The absolute address of the document to be accessed.
689: ** filter if YES, treat document as HTML
690: **
691: ** On Exit,
692: ** returns YES Success in opening document
693: ** NO Failure
694: **
695: **
696: */
697:
1.15 timbl 698: PUBLIC BOOL HTLoadAbsolute ARGS2(CONST char *,addr, HTRequest*, request)
1.2 timbl 699: {
1.19 timbl 700: HTAnchor * anchor = HTAnchor_findAddress(addr);
701: request->anchor = HTAnchor_parent(anchor);
702: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ?
703: NULL : (HTChildAnchor*) anchor;
704: return HTLoadDocument(request);
1.2 timbl 705: }
706:
707:
708: /* Load a document from absolute name to stream
709: ** --------------------------------------------
710: **
711: ** On Entry,
712: ** addr The absolute address of the document to be accessed.
1.15 timbl 713: ** request->output_stream if non-NULL, send data down this stream
1.2 timbl 714: **
715: ** On Exit,
716: ** returns YES Success in opening document
717: ** NO Failure
718: **
719: **
720: */
721:
722: PUBLIC BOOL HTLoadToStream ARGS3(
723: CONST char *, addr,
724: BOOL, filter,
1.15 timbl 725: HTRequest*, request)
1.1 timbl 726: {
1.19 timbl 727: HTAnchor * anchor = HTAnchor_findAddress(addr);
728: request->anchor = HTAnchor_parent(anchor);
729: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL :
730: (HTChildAnchor*) anchor;
1.15 timbl 731: request->output_stream = request->output_stream;
1.19 timbl 732: return HTLoadDocument(request);
1.1 timbl 733: }
734:
735:
1.2 timbl 736:
737:
1.1 timbl 738: /* Load a document from relative name
739: ** ---------------
740: **
741: ** On Entry,
1.2 timbl 742: ** relative_name The relative address of the document
743: ** to be accessed.
1.1 timbl 744: **
745: ** On Exit,
746: ** returns YES Success in opening document
747: ** NO Failure
748: **
749: **
750: */
751:
1.15 timbl 752: PUBLIC BOOL HTLoadRelative ARGS3(
1.2 timbl 753: CONST char *, relative_name,
1.15 timbl 754: HTParentAnchor *, here,
1.20 luotonen 755: HTRequest *, request)
1.1 timbl 756: {
757: char * full_address = 0;
758: BOOL result;
759: char * mycopy = 0;
760: char * stripped = 0;
761: char * current_address =
1.2 timbl 762: HTAnchor_address((HTAnchor*)here);
1.1 timbl 763:
764: StrAllocCopy(mycopy, relative_name);
765:
766: stripped = HTStrip(mycopy);
767: full_address = HTParse(stripped,
768: current_address,
769: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.15 timbl 770: result = HTLoadAbsolute(full_address, request);
1.1 timbl 771: free(full_address);
772: free(current_address);
773: free(mycopy); /* Memory leak fixed 10/7/92 -- JFG */
774: return result;
775: }
776:
777:
778: /* Load if necessary, and select an anchor
779: ** --------------------------------------
780: **
781: ** On Entry,
782: ** destination The child or parenet anchor to be loaded.
783: **
784: ** On Exit,
785: ** returns YES Success
786: ** NO Failure
787: **
788: */
789:
1.15 timbl 790: PUBLIC BOOL HTLoadAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1.1 timbl 791: {
1.15 timbl 792: if (!anchor) return NO; /* No link */
1.1 timbl 793:
1.15 timbl 794: request->anchor = HTAnchor_parent(anchor);
1.19 timbl 795: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
796: : (HTChildAnchor*) anchor;
1.1 timbl 797:
1.19 timbl 798: return HTLoadDocument(request) ? YES : NO;
1.1 timbl 799:
800: } /* HTLoadAnchor */
801:
802:
803: /* Search
804: ** ------
805: ** Performs a keyword search on word given by the user. Adds the keyword to
806: ** the end of the current address and attempts to open the new address.
807: **
808: ** On Entry,
809: ** *keywords space-separated keyword list or similar search list
1.2 timbl 810: ** here is anchor search is to be done on.
1.1 timbl 811: */
812:
1.2 timbl 813: PRIVATE char hex(i)
814: int i;
815: {
1.13 timbl 816: char * hexchars = "0123456789ABCDEF";
817: return hexchars[i];
1.2 timbl 818: }
1.1 timbl 819:
1.15 timbl 820: PUBLIC BOOL HTSearch ARGS3(
1.2 timbl 821: CONST char *, keywords,
1.15 timbl 822: HTParentAnchor *, here,
823: HTRequest *, request)
1.1 timbl 824: {
1.2 timbl 825:
826: #define acceptable \
827: "1234567890abcdefghijlkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_"
828:
829: char *q, *u;
830: CONST char * p, *s, *e; /* Pointers into keywords */
831: char * address = HTAnchor_address((HTAnchor*)here);
1.1 timbl 832: BOOL result;
1.2 timbl 833: char * escaped = malloc(strlen(keywords)*3+1);
834:
1.29 frystyk 835: /* static CONST BOOL isAcceptable[96] = */
836: /* static AND const is not good for a gnu compiler! Frystyk 25/02-94 */
1.30 luotonen 837: static BOOL isAcceptable[96] =
1.2 timbl 838: /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
839: { 0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0, /* 2x !"#$%&'()*+,-./ */
840: 1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0, /* 3x 0123456789:;<=>? */
841: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 4x @ABCDEFGHIJKLMNO */
842: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1, /* 5X PQRSTUVWXYZ[\]^_ */
843: 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 6x `abcdefghijklmno */
844: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0 }; /* 7X pqrstuvwxyz{\}~ DEL */
845:
846: if (escaped == NULL) outofmem(__FILE__, "HTSearch");
847:
1.29 frystyk 848: /* Convert spaces to + and hex escape unacceptable characters */
1.2 timbl 849:
1.29 frystyk 850: for(s=keywords; *s && WHITE(*s); s++); /*scan */ /* Skip white space */
851: for(e = s + strlen(s); e>s && WHITE(*(e-1)) ; e--); /* Skip trailers */
852: for(q=escaped, p=s; p<e; p++) { /* scan stripped field */
1.2 timbl 853: int c = (int)TOASCII(*p);
854: if (WHITE(*p)) {
855: *q++ = '+';
1.29 frystyk 856: } else if (c>=32 && c<=127 && isAcceptable[c-32] != 0) {
1.13 timbl 857: *q++ = *p; /* 930706 TBL for MVS bug */
1.2 timbl 858: } else {
859: *q++ = '%';
860: *q++ = hex(c / 16);
861: *q++ = hex(c % 16);
862: }
863: } /* Loop over string */
1.1 timbl 864:
1.2 timbl 865: *q=0;
866: /* terminate escaped sctring */
867: u=strchr(address, '?'); /* Find old search string */
868: if (u) *u = 0; /* Chop old search off */
1.1 timbl 869:
870: StrAllocCat(address, "?");
1.2 timbl 871: StrAllocCat(address, escaped);
872: free(escaped);
1.15 timbl 873: result = HTLoadRelative(address, here, request);
1.1 timbl 874: free(address);
1.2 timbl 875:
1.1 timbl 876: return result;
1.2 timbl 877: }
878:
879:
880: /* Search Given Indexname
881: ** ------
882: ** Performs a keyword search on word given by the user. Adds the keyword to
883: ** the end of the current address and attempts to open the new address.
884: **
885: ** On Entry,
886: ** *keywords space-separated keyword list or similar search list
887: ** *addres is name of object search is to be done on.
888: */
889:
1.15 timbl 890: PUBLIC BOOL HTSearchAbsolute ARGS3(
1.2 timbl 891: CONST char *, keywords,
1.15 timbl 892: CONST char *, indexname,
893: HTRequest *, request)
1.2 timbl 894: {
895: HTParentAnchor * anchor =
896: (HTParentAnchor*) HTAnchor_findAddress(indexname);
1.15 timbl 897: return HTSearch(keywords, anchor, request);
1.2 timbl 898: }
899:
900:
901: /* Generate the anchor for the home page
902: ** -------------------------------------
903: **
904: ** As it involves file access, this should only be done once
905: ** when the program first runs.
1.10 timbl 906: ** This is a default algorithm -- browser don't HAVE to use this.
907: ** But consistency betwen browsers is STRONGLY recommended!
1.2 timbl 908: **
1.10 timbl 909: ** Priority order is:
910: **
911: ** 1 WWW_HOME environment variable (logical name, etc)
912: ** 2 ~/WWW/default.html
913: ** 3 /usr/local/bin/default.html
914: ** 4 http://info.cern.ch/default.html
915: **
1.2 timbl 916: */
917: PUBLIC HTParentAnchor * HTHomeAnchor NOARGS
918: {
1.12 timbl 919: char * my_home_document = NULL;
920: char * home = (char *)getenv(LOGICAL_DEFAULT);
1.2 timbl 921: char * ref;
922: HTParentAnchor * anchor;
1.1 timbl 923:
1.12 timbl 924: if (home) {
925: StrAllocCopy(my_home_document, home);
926:
927: /* Someone telnets in, they get a special home.
928: */
929: #define MAX_FILE_NAME 1024 /* @@@ */
930: } else if (HTClientHost) { /* Telnet server */
931: FILE * fp = fopen(REMOTE_POINTER, "r");
932: char * status;
933: if (fp) {
934: my_home_document = (char*) malloc(MAX_FILE_NAME);
935: status = fgets(my_home_document, MAX_FILE_NAME, fp);
936: if (!status) {
937: free(my_home_document);
938: my_home_document = NULL;
939: }
940: fclose(fp);
941: }
942: if (!my_home_document) StrAllocCopy(my_home_document, REMOTE_ADDRESS);
943: }
944:
945:
946:
1.2 timbl 947: #ifdef unix
1.12 timbl 948:
1.10 timbl 949: if (!my_home_document) {
950: FILE * fp = NULL;
951: CONST char * home = (CONST char*)getenv("HOME");
952: if (home) {
953: my_home_document = (char *)malloc(
954: strlen(home)+1+ strlen(PERSONAL_DEFAULT)+1);
955: if (my_home_document == NULL) outofmem(__FILE__, "HTLocalName");
956: sprintf(my_home_document, "%s/%s", home, PERSONAL_DEFAULT);
957: fp = fopen(my_home_document, "r");
958: }
959:
960: if (!fp) {
961: StrAllocCopy(my_home_document, LOCAL_DEFAULT_FILE);
962: fp = fopen(my_home_document, "r");
963: }
1.2 timbl 964: if (fp) {
965: fclose(fp);
966: } else {
967: if (TRACE) fprintf(stderr,
1.10 timbl 968: "HTBrowse: No local home document ~/%s or %s\n",
969: PERSONAL_DEFAULT, LOCAL_DEFAULT_FILE);
1.11 timbl 970: free(my_home_document);
971: my_home_document = NULL;
1.2 timbl 972: }
973: }
974: #endif
1.10 timbl 975: ref = HTParse( my_home_document ? my_home_document :
976: HTClientHost ? REMOTE_ADDRESS
977: : LAST_RESORT,
978: "file:",
1.2 timbl 979: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.10 timbl 980: if (my_home_document) {
1.2 timbl 981: if (TRACE) fprintf(stderr,
982: "HTAccess: Using custom home page %s i.e. address %s\n",
1.10 timbl 983: my_home_document, ref);
984: free(my_home_document);
1.2 timbl 985: }
986: anchor = (HTParentAnchor*) HTAnchor_findAddress(ref);
987: free(ref);
988: return anchor;
1.1 timbl 989: }
1.26 frystyk 990:
991:
992: /* Bind an Anchor to the request structure
993: ** ---------------------------------------
994: **
995: ** On Entry,
996: ** anchor The child or parenet anchor to be binded
997: ** request The request sturcture
998: ** On Exit,
999: ** returns YES Success
1000: ** NO Failure
1001: **
1002: ** Note: Actually the same as HTLoadAnchor() but DOES NOT do the loading
1003: ** Henrik Frystyk 17/02-94
1004: */
1005:
1006: PUBLIC BOOL HTBindAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1007: {
1008: if (!anchor) return NO; /* No link */
1009:
1010: request->anchor = HTAnchor_parent(anchor);
1011: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
1012: : (HTChildAnchor*) anchor;
1013:
1.29 frystyk 1014: return YES;
1.26 frystyk 1015: } /* HTBindAnchor */
1.39 luotonen 1016:
1017:
1018:
1019: /*
1020: * Error diagnostics
1021: */
1022: PUBLIC void HTAddError ARGS2(HTRequest *, req,
1.40 luotonen 1023: CONST char *, msg)
1.39 luotonen 1024: {
1025: HTAddError2(req,msg,NULL);
1026: }
1027:
1028: PUBLIC void HTAddError2 ARGS3(HTRequest *, req,
1.40 luotonen 1029: CONST char *, msg,
1030: CONST char *, param)
1.39 luotonen 1031: {
1032: int mlen = msg ? strlen(msg) : 0;
1033: int plen = param ? strlen(param) : 0;
1034: char * str;
1035:
1036: if (!req) return;
1.47 ! luotonen 1037: if (!req->old_error_stack) req->old_error_stack = HTList_new();
1.39 luotonen 1038:
1039: str = (char*)malloc(mlen + plen + 2);
1040: if (!str) outofmem(__FILE__,"HTAddError2");
1041:
1042: if (msg) strcpy(str,msg);
1043: strcpy(str+mlen," ");
1044: if (param) strcpy(str+mlen+1,param);
1045:
1.47 ! luotonen 1046: HTList_addObject(req->old_error_stack, (void*)str);
1.39 luotonen 1047: CTRACE(stderr, "libwww error: %s\n", str);
1048: }
1049:
1050: PUBLIC void HTAddErrorN ARGS3(HTRequest *, req,
1.40 luotonen 1051: CONST char *, msg,
1.39 luotonen 1052: int, num)
1053: {
1054: char buf[20];
1055: sprintf(buf,"%d",num);
1056: HTAddError2(req,msg,buf);
1057: }
1058:
1059: PUBLIC void HTClearErrors ARGS1(HTRequest *, req)
1060: {
1.47 ! luotonen 1061: if (req && req->old_error_stack) {
! 1062: HTList * cur = req->old_error_stack;
1.39 luotonen 1063: char * str;
1064: while ((str = (char*)HTList_nextObject(cur)))
1065: free(str);
1.47 ! luotonen 1066: HTList_delete(req->old_error_stack);
! 1067: req->old_error_stack = NULL;
1.39 luotonen 1068: }
1069: }
1.26 frystyk 1070:
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