Annotation of libwww/Library/src/HTAccess.c, revision 1.46
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
1.45 luotonen 347: if (HTImServer) /* cern_httpd has already done its own translations */
348: HTAnchor_setPhysical(req->anchor, HTImServer);
349: #ifdef OLD_CODE
1.27 luotonen 350: HTAnchor_setPhysical(req->anchor, addr);
1.45 luotonen 351: #endif
1.21 luotonen 352: else {
1.27 luotonen 353: char * physical = HTTranslate(addr);
1.21 luotonen 354: if (!physical) {
355: return HT_FORBIDDEN;
356: }
357: HTAnchor_setPhysical(req->anchor, physical);
358: free(physical); /* free our copy */
1.2 timbl 359: }
360: #else
1.21 luotonen 361: HTAnchor_setPhysical(req->anchor, addr);
1.2 timbl 362: #endif
363:
1.21 luotonen 364: access = HTParse(HTAnchor_physical(req->anchor),
1.27 luotonen 365: "file:", PARSE_ACCESS);
1.1 timbl 366:
367: /* Check whether gateway access has been set up for this
1.8 timbl 368: **
369: ** This function can be replaced by the rule system above.
1.1 timbl 370: */
1.8 timbl 371: #define USE_GATEWAYS
1.1 timbl 372: #ifdef USE_GATEWAYS
1.39 luotonen 373:
374: /* make sure the using_proxy variable is false */
375: using_proxy = NO;
376:
1.33 luotonen 377: if (!override_proxy(addr)) {
1.27 luotonen 378: char * gateway_parameter, *gateway, *proxy;
379:
1.2 timbl 380: gateway_parameter = (char *)malloc(strlen(access)+20);
381: if (gateway_parameter == NULL) outofmem(__FILE__, "HTLoad");
1.27 luotonen 382:
383: /* search for proxy gateways */
1.2 timbl 384: strcpy(gateway_parameter, "WWW_");
385: strcat(gateway_parameter, access);
386: strcat(gateway_parameter, "_GATEWAY");
387: gateway = (char *)getenv(gateway_parameter); /* coerce for decstation */
1.27 luotonen 388:
389: /* search for proxy servers */
390: strcpy(gateway_parameter, access);
391: strcat(gateway_parameter, "_proxy");
392: proxy = (char *)getenv(gateway_parameter);
393:
1.2 timbl 394: free(gateway_parameter);
1.27 luotonen 395:
396: if (TRACE && gateway)
397: fprintf(stderr,"Gateway found: %s\n",gateway);
398: if (TRACE && proxy)
399: fprintf(stderr,"Proxy server found: %s\n",proxy);
400:
1.8 timbl 401: #ifndef DIRECT_WAIS
1.9 timbl 402: if (!gateway && 0==strcmp(access, "wais")) {
1.8 timbl 403: gateway = DEFAULT_WAIS_GATEWAY;
404: }
405: #endif
1.27 luotonen 406:
407: /* proxy servers have precedence over gateway servers */
408: if (proxy) {
409: char * gatewayed=0;
410:
411: StrAllocCopy(gatewayed,proxy);
412: StrAllocCat(gatewayed,addr);
413: using_proxy = YES;
414: HTAnchor_setPhysical(req->anchor, gatewayed);
415: free(gatewayed);
416: free(access);
417:
418: access = HTParse(HTAnchor_physical(req->anchor),
419: "http:", PARSE_ACCESS);
420: } else if (gateway) {
1.9 timbl 421: char * path = HTParse(addr, "",
422: PARSE_HOST + PARSE_PATH + PARSE_PUNCTUATION);
423: /* Chop leading / off to make host into part of path */
424: char * gatewayed = HTParse(path+1, gateway, PARSE_ALL);
425: free(path);
1.21 luotonen 426: HTAnchor_setPhysical(req->anchor, gatewayed);
1.9 timbl 427: free(gatewayed);
1.2 timbl 428: free(access);
1.9 timbl 429:
1.21 luotonen 430: access = HTParse(HTAnchor_physical(req->anchor),
1.8 timbl 431: "http:", PARSE_ACCESS);
1.2 timbl 432: }
433: }
1.1 timbl 434: #endif
435:
1.19 timbl 436: free(addr);
1.1 timbl 437:
438:
439: /* Search registered protocols to find suitable one
440: */
441: {
1.20 luotonen 442: HTList *cur;
443: HTProtocol *p;
1.1 timbl 444: #ifndef NO_INIT
1.2 timbl 445: if (!protocols) HTAccessInit();
1.1 timbl 446: #endif
1.20 luotonen 447: cur = protocols;
448: while ((p = (HTProtocol*)HTList_nextObject(cur))) {
1.2 timbl 449: if (strcmp(p->name, access)==0) {
1.21 luotonen 450: HTAnchor_setProtocol(req->anchor, p);
1.2 timbl 451: free(access);
452: return (HT_OK);
1.1 timbl 453: }
454: }
455: }
456:
457: free(access);
1.2 timbl 458: return HT_NO_ACCESS;
1.1 timbl 459: }
460:
461:
462: /* Load a document
463: ** ---------------
464: **
1.2 timbl 465: ** This is an internal routine, which has an address AND a matching
466: ** anchor. (The public routines are called with one OR the other.)
467: **
468: ** On entry,
1.15 timbl 469: ** request->
1.35 luotonen 470: ** anchor a parent anchor with fully qualified
471: ** hypertext reference as its address set
1.15 timbl 472: ** output_format valid
473: ** output_stream valid on NULL
1.2 timbl 474: **
475: ** On exit,
476: ** returns <0 Error has occured.
477: ** HT_LOADED Success
478: ** HT_NO_DATA Success, but no document loaded.
1.8 timbl 479: ** (telnet sesssion started etc)
1.2 timbl 480: **
481: */
1.35 luotonen 482: PUBLIC int HTLoad ARGS1(HTRequest *, request)
1.2 timbl 483: {
1.25 frystyk 484: char *arg = NULL;
485: HTProtocol *p;
486: int status;
487:
1.22 luotonen 488: if (request->method == METHOD_INVALID)
489: request->method = METHOD_GET;
1.21 luotonen 490: status = get_physical(request);
1.2 timbl 491: if (status == HT_FORBIDDEN) {
1.21 luotonen 492: return HTLoadError(request, 500,
493: "Access forbidden by rule");
1.2 timbl 494: }
495: if (status < 0) return status; /* Can't resolve or forbidden */
1.25 frystyk 496:
497: if(!(arg = HTAnchor_physical(request->anchor)) || !*arg)
498: return (-1);
1.27 luotonen 499:
1.15 timbl 500: p = HTAnchor_protocol(request->anchor);
1.17 timbl 501: return (*(p->load))(request);
1.2 timbl 502: }
503:
504:
505: /* Get a save stream for a document
506: ** --------------------------------
507: */
1.19 timbl 508: PUBLIC HTStream *HTSaveStream ARGS1(HTRequest *, request)
1.15 timbl 509: {
510: HTProtocol * p;
1.19 timbl 511: int status;
1.22 luotonen 512: request->method = METHOD_PUT;
1.21 luotonen 513: status = get_physical(request);
1.19 timbl 514: if (status == HT_FORBIDDEN) {
1.21 luotonen 515: HTLoadError(request, 500,
516: "Access forbidden by rule");
1.19 timbl 517: return NULL; /* should return error status? */
518: }
519: if (status < 0) return NULL; /* @@ error. Can't resolve or forbidden */
520:
1.15 timbl 521: p = HTAnchor_protocol(request->anchor);
1.2 timbl 522: if (!p) return NULL;
523:
1.15 timbl 524: return (*p->saveStream)(request);
1.2 timbl 525:
526: }
527:
528:
529: /* Load a document - with logging etc
530: ** ----------------------------------
531: **
532: ** - Checks or documents already loaded
533: ** - Logs the access
534: ** - Allows stdin filter option
535: ** - Trace ouput and error messages
536: **
1.1 timbl 537: ** On Entry,
1.19 timbl 538: ** request->anchor valid for of the document to be accessed.
539: ** request->childAnchor optional anchor within doc to be selected
540: **
1.2 timbl 541: ** filter if YES, treat stdin as HTML
1.1 timbl 542: **
1.15 timbl 543: ** request->anchor is the node_anchor for the document
544: ** request->output_format is valid
545: **
1.1 timbl 546: ** On Exit,
547: ** returns YES Success in opening document
548: ** NO Failure
549: **
550: */
551:
1.19 timbl 552: PRIVATE BOOL HTLoadDocument ARGS1(HTRequest *, request)
1.1 timbl 553:
554: {
555: int status;
556: HText * text;
1.19 timbl 557: char * full_address = HTAnchor_address((HTAnchor*)request->anchor);
558:
1.1 timbl 559: if (TRACE) fprintf (stderr,
560: "HTAccess: loading document %s\n", full_address);
561:
1.18 timbl 562: request->using_cache = NULL;
563:
1.15 timbl 564: if (!request->output_format) request->output_format = WWW_PRESENT;
1.25 frystyk 565:
1.31 frystyk 566: if (!HTForceReload && (text=(HText *)HTAnchor_document(request->anchor)))
1.15 timbl 567: { /* Already loaded */
1.1 timbl 568: if (TRACE) fprintf(stderr, "HTAccess: Document already in memory.\n");
1.19 timbl 569: if (request->childAnchor) {
570: HText_selectAnchor(text, request->childAnchor);
571: } else {
572: HText_select(text);
573: }
574: free(full_address);
1.1 timbl 575: return YES;
576: }
1.17 timbl 577:
1.34 frystyk 578: /* Check the Cache */
579: /* Caching is ONLY done if (char*) HTCacheDir is set. Henrik 09/03-94 */
1.17 timbl 580: /* Bug: for each format, we only check whether it is ok, we
581: don't check them all and chose the best */
1.38 timbl 582: if (/* HTCacheDir && */ request->anchor->cacheItems) {
1.17 timbl 583: HTList * list = request->anchor->cacheItems;
1.20 luotonen 584: HTList * cur = list;
585: HTCacheItem * item;
586:
587: while ((item = (HTCacheItem*)HTList_nextObject(cur))) {
1.18 timbl 588: HTStream * s;
589:
590: request->using_cache = item;
591:
1.37 luotonen 592: s = HTStreamStack(item->format, request, NO);
1.17 timbl 593: if (s) { /* format was suitable */
594: FILE * fp = fopen(item->filename, "r");
1.18 timbl 595: if (TRACE) fprintf(stderr, "Cache: HIT file %s for %s\n",
1.20 luotonen 596: item->filename,
597: full_address);
1.17 timbl 598: if (fp) {
599: HTFileCopy(fp, s);
1.24 timbl 600: (*s->isa->free)(s); /* close up pipeline */
1.17 timbl 601: fclose(fp);
1.19 timbl 602: free(full_address);
1.17 timbl 603: return YES;
604: } else {
605: fprintf(stderr, "***** Can't read cache file %s !\n",
1.20 luotonen 606: item->filename);
1.17 timbl 607: } /* file open ok */
608: } /* stream ok */
609: } /* next cache item */
610: } /* if cache available for this anchor */
1.1 timbl 611:
1.35 luotonen 612: status = HTLoad(request);
1.2 timbl 613:
614:
1.1 timbl 615: /* Log the access if necessary
616: */
1.42 frystyk 617: if (HTlogfile) {
1.1 timbl 618: time_t theTime;
619: time(&theTime);
1.42 frystyk 620: fprintf(HTlogfile, "%24.24s %s %s %s\n",
1.1 timbl 621: ctime(&theTime),
622: HTClientHost ? HTClientHost : "local",
623: status<0 ? "FAIL" : "GET",
624: full_address);
1.42 frystyk 625: fflush(HTlogfile); /* Actually update it on disk */
1.1 timbl 626: if (TRACE) fprintf(stderr, "Log: %24.24s %s %s %s\n",
627: ctime(&theTime),
628: HTClientHost ? HTClientHost : "local",
629: status<0 ? "FAIL" : "GET",
630: full_address);
631: }
632:
633: if (status == HT_LOADED) {
634: if (TRACE) {
635: fprintf(stderr, "HTAccess: `%s' has been accessed.\n",
636: full_address);
637: }
1.19 timbl 638: free(full_address);
1.1 timbl 639: return YES;
640: }
641:
642: if (status == HT_NO_DATA) {
643: if (TRACE) {
644: fprintf(stderr,
645: "HTAccess: `%s' has been accessed, No data left.\n",
646: full_address);
647: }
1.19 timbl 648: free(full_address);
1.1 timbl 649: return NO;
650: }
651:
1.34 frystyk 652: /* Bug fix thanks to Lou Montulli. Henrik 10/03-94 */
653: if (status<=0) { /* Failure in accessing a document */
1.1 timbl 654: #ifdef CURSES
655: user_message("Can't access `%s'", full_address);
656: #else
1.5 timbl 657: if (TRACE) fprintf(stderr,
658: "HTAccess: Can't access `%s'\n", full_address);
1.1 timbl 659: #endif
1.32 frystyk 660: /* This is done in the specific load procedures... Henrik 07/03-94 */
1.46 ! frystyk 661: #if 0
1.39 luotonen 662: if (request->error_stack)
663: HTLoadError(request, 500, "Unable to access document.");
1.46 ! frystyk 664: #endif
1.19 timbl 665: free(full_address);
1.1 timbl 666: return NO;
667: }
1.9 timbl 668:
669: /* If you get this, then please find which routine is returning
670: a positive unrecognised error code! */
671:
1.1 timbl 672: fprintf(stderr,
1.2 timbl 673: "**** HTAccess: socket or file number returned by obsolete load routine!\n");
1.9 timbl 674: fprintf(stderr,
1.19 timbl 675: "**** HTAccess: Internal software error. Please mail www-bug@info.cern.ch quoting the version number of this software and the URL: %s!\n",
676: full_address);
677: free(full_address);
678:
1.1 timbl 679: exit(-6996);
1.20 luotonen 680: return NO; /* For gcc :-( */
1.2 timbl 681: } /* HTLoadDocument */
1.1 timbl 682:
683:
684:
685: /* Load a document from absolute name
686: ** ---------------
687: **
688: ** On Entry,
689: ** addr The absolute address of the document to be accessed.
690: ** filter if YES, treat document as HTML
691: **
692: ** On Exit,
693: ** returns YES Success in opening document
694: ** NO Failure
695: **
696: **
697: */
698:
1.15 timbl 699: PUBLIC BOOL HTLoadAbsolute ARGS2(CONST char *,addr, HTRequest*, request)
1.2 timbl 700: {
1.19 timbl 701: HTAnchor * anchor = HTAnchor_findAddress(addr);
702: request->anchor = HTAnchor_parent(anchor);
703: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ?
704: NULL : (HTChildAnchor*) anchor;
705: return HTLoadDocument(request);
1.2 timbl 706: }
707:
708:
709: /* Load a document from absolute name to stream
710: ** --------------------------------------------
711: **
712: ** On Entry,
713: ** addr The absolute address of the document to be accessed.
1.15 timbl 714: ** request->output_stream if non-NULL, send data down this stream
1.2 timbl 715: **
716: ** On Exit,
717: ** returns YES Success in opening document
718: ** NO Failure
719: **
720: **
721: */
722:
723: PUBLIC BOOL HTLoadToStream ARGS3(
724: CONST char *, addr,
725: BOOL, filter,
1.15 timbl 726: HTRequest*, request)
1.1 timbl 727: {
1.19 timbl 728: HTAnchor * anchor = HTAnchor_findAddress(addr);
729: request->anchor = HTAnchor_parent(anchor);
730: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL :
731: (HTChildAnchor*) anchor;
1.15 timbl 732: request->output_stream = request->output_stream;
1.19 timbl 733: return HTLoadDocument(request);
1.1 timbl 734: }
735:
736:
1.2 timbl 737:
738:
1.1 timbl 739: /* Load a document from relative name
740: ** ---------------
741: **
742: ** On Entry,
1.2 timbl 743: ** relative_name The relative address of the document
744: ** to be accessed.
1.1 timbl 745: **
746: ** On Exit,
747: ** returns YES Success in opening document
748: ** NO Failure
749: **
750: **
751: */
752:
1.15 timbl 753: PUBLIC BOOL HTLoadRelative ARGS3(
1.2 timbl 754: CONST char *, relative_name,
1.15 timbl 755: HTParentAnchor *, here,
1.20 luotonen 756: HTRequest *, request)
1.1 timbl 757: {
758: char * full_address = 0;
759: BOOL result;
760: char * mycopy = 0;
761: char * stripped = 0;
762: char * current_address =
1.2 timbl 763: HTAnchor_address((HTAnchor*)here);
1.1 timbl 764:
765: StrAllocCopy(mycopy, relative_name);
766:
767: stripped = HTStrip(mycopy);
768: full_address = HTParse(stripped,
769: current_address,
770: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.15 timbl 771: result = HTLoadAbsolute(full_address, request);
1.1 timbl 772: free(full_address);
773: free(current_address);
774: free(mycopy); /* Memory leak fixed 10/7/92 -- JFG */
775: return result;
776: }
777:
778:
779: /* Load if necessary, and select an anchor
780: ** --------------------------------------
781: **
782: ** On Entry,
783: ** destination The child or parenet anchor to be loaded.
784: **
785: ** On Exit,
786: ** returns YES Success
787: ** NO Failure
788: **
789: */
790:
1.15 timbl 791: PUBLIC BOOL HTLoadAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1.1 timbl 792: {
1.15 timbl 793: if (!anchor) return NO; /* No link */
1.1 timbl 794:
1.15 timbl 795: request->anchor = HTAnchor_parent(anchor);
1.19 timbl 796: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
797: : (HTChildAnchor*) anchor;
1.1 timbl 798:
1.19 timbl 799: return HTLoadDocument(request) ? YES : NO;
1.1 timbl 800:
801: } /* HTLoadAnchor */
802:
803:
804: /* Search
805: ** ------
806: ** Performs a keyword search on word given by the user. Adds the keyword to
807: ** the end of the current address and attempts to open the new address.
808: **
809: ** On Entry,
810: ** *keywords space-separated keyword list or similar search list
1.2 timbl 811: ** here is anchor search is to be done on.
1.1 timbl 812: */
813:
1.2 timbl 814: PRIVATE char hex(i)
815: int i;
816: {
1.13 timbl 817: char * hexchars = "0123456789ABCDEF";
818: return hexchars[i];
1.2 timbl 819: }
1.1 timbl 820:
1.15 timbl 821: PUBLIC BOOL HTSearch ARGS3(
1.2 timbl 822: CONST char *, keywords,
1.15 timbl 823: HTParentAnchor *, here,
824: HTRequest *, request)
1.1 timbl 825: {
1.2 timbl 826:
827: #define acceptable \
828: "1234567890abcdefghijlkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_"
829:
830: char *q, *u;
831: CONST char * p, *s, *e; /* Pointers into keywords */
832: char * address = HTAnchor_address((HTAnchor*)here);
1.1 timbl 833: BOOL result;
1.2 timbl 834: char * escaped = malloc(strlen(keywords)*3+1);
835:
1.29 frystyk 836: /* static CONST BOOL isAcceptable[96] = */
837: /* static AND const is not good for a gnu compiler! Frystyk 25/02-94 */
1.30 luotonen 838: static BOOL isAcceptable[96] =
1.2 timbl 839: /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
840: { 0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0, /* 2x !"#$%&'()*+,-./ */
841: 1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0, /* 3x 0123456789:;<=>? */
842: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 4x @ABCDEFGHIJKLMNO */
843: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1, /* 5X PQRSTUVWXYZ[\]^_ */
844: 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 6x `abcdefghijklmno */
845: 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0 }; /* 7X pqrstuvwxyz{\}~ DEL */
846:
847: if (escaped == NULL) outofmem(__FILE__, "HTSearch");
848:
1.29 frystyk 849: /* Convert spaces to + and hex escape unacceptable characters */
1.2 timbl 850:
1.29 frystyk 851: for(s=keywords; *s && WHITE(*s); s++); /*scan */ /* Skip white space */
852: for(e = s + strlen(s); e>s && WHITE(*(e-1)) ; e--); /* Skip trailers */
853: for(q=escaped, p=s; p<e; p++) { /* scan stripped field */
1.2 timbl 854: int c = (int)TOASCII(*p);
855: if (WHITE(*p)) {
856: *q++ = '+';
1.29 frystyk 857: } else if (c>=32 && c<=127 && isAcceptable[c-32] != 0) {
1.13 timbl 858: *q++ = *p; /* 930706 TBL for MVS bug */
1.2 timbl 859: } else {
860: *q++ = '%';
861: *q++ = hex(c / 16);
862: *q++ = hex(c % 16);
863: }
864: } /* Loop over string */
1.1 timbl 865:
1.2 timbl 866: *q=0;
867: /* terminate escaped sctring */
868: u=strchr(address, '?'); /* Find old search string */
869: if (u) *u = 0; /* Chop old search off */
1.1 timbl 870:
871: StrAllocCat(address, "?");
1.2 timbl 872: StrAllocCat(address, escaped);
873: free(escaped);
1.15 timbl 874: result = HTLoadRelative(address, here, request);
1.1 timbl 875: free(address);
1.2 timbl 876:
1.1 timbl 877: return result;
1.2 timbl 878: }
879:
880:
881: /* Search Given Indexname
882: ** ------
883: ** Performs a keyword search on word given by the user. Adds the keyword to
884: ** the end of the current address and attempts to open the new address.
885: **
886: ** On Entry,
887: ** *keywords space-separated keyword list or similar search list
888: ** *addres is name of object search is to be done on.
889: */
890:
1.15 timbl 891: PUBLIC BOOL HTSearchAbsolute ARGS3(
1.2 timbl 892: CONST char *, keywords,
1.15 timbl 893: CONST char *, indexname,
894: HTRequest *, request)
1.2 timbl 895: {
896: HTParentAnchor * anchor =
897: (HTParentAnchor*) HTAnchor_findAddress(indexname);
1.15 timbl 898: return HTSearch(keywords, anchor, request);
1.2 timbl 899: }
900:
901:
902: /* Generate the anchor for the home page
903: ** -------------------------------------
904: **
905: ** As it involves file access, this should only be done once
906: ** when the program first runs.
1.10 timbl 907: ** This is a default algorithm -- browser don't HAVE to use this.
908: ** But consistency betwen browsers is STRONGLY recommended!
1.2 timbl 909: **
1.10 timbl 910: ** Priority order is:
911: **
912: ** 1 WWW_HOME environment variable (logical name, etc)
913: ** 2 ~/WWW/default.html
914: ** 3 /usr/local/bin/default.html
915: ** 4 http://info.cern.ch/default.html
916: **
1.2 timbl 917: */
918: PUBLIC HTParentAnchor * HTHomeAnchor NOARGS
919: {
1.12 timbl 920: char * my_home_document = NULL;
921: char * home = (char *)getenv(LOGICAL_DEFAULT);
1.2 timbl 922: char * ref;
923: HTParentAnchor * anchor;
1.1 timbl 924:
1.12 timbl 925: if (home) {
926: StrAllocCopy(my_home_document, home);
927:
928: /* Someone telnets in, they get a special home.
929: */
930: #define MAX_FILE_NAME 1024 /* @@@ */
931: } else if (HTClientHost) { /* Telnet server */
932: FILE * fp = fopen(REMOTE_POINTER, "r");
933: char * status;
934: if (fp) {
935: my_home_document = (char*) malloc(MAX_FILE_NAME);
936: status = fgets(my_home_document, MAX_FILE_NAME, fp);
937: if (!status) {
938: free(my_home_document);
939: my_home_document = NULL;
940: }
941: fclose(fp);
942: }
943: if (!my_home_document) StrAllocCopy(my_home_document, REMOTE_ADDRESS);
944: }
945:
946:
947:
1.2 timbl 948: #ifdef unix
1.12 timbl 949:
1.10 timbl 950: if (!my_home_document) {
951: FILE * fp = NULL;
952: CONST char * home = (CONST char*)getenv("HOME");
953: if (home) {
954: my_home_document = (char *)malloc(
955: strlen(home)+1+ strlen(PERSONAL_DEFAULT)+1);
956: if (my_home_document == NULL) outofmem(__FILE__, "HTLocalName");
957: sprintf(my_home_document, "%s/%s", home, PERSONAL_DEFAULT);
958: fp = fopen(my_home_document, "r");
959: }
960:
961: if (!fp) {
962: StrAllocCopy(my_home_document, LOCAL_DEFAULT_FILE);
963: fp = fopen(my_home_document, "r");
964: }
1.2 timbl 965: if (fp) {
966: fclose(fp);
967: } else {
968: if (TRACE) fprintf(stderr,
1.10 timbl 969: "HTBrowse: No local home document ~/%s or %s\n",
970: PERSONAL_DEFAULT, LOCAL_DEFAULT_FILE);
1.11 timbl 971: free(my_home_document);
972: my_home_document = NULL;
1.2 timbl 973: }
974: }
975: #endif
1.10 timbl 976: ref = HTParse( my_home_document ? my_home_document :
977: HTClientHost ? REMOTE_ADDRESS
978: : LAST_RESORT,
979: "file:",
1.2 timbl 980: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
1.10 timbl 981: if (my_home_document) {
1.2 timbl 982: if (TRACE) fprintf(stderr,
983: "HTAccess: Using custom home page %s i.e. address %s\n",
1.10 timbl 984: my_home_document, ref);
985: free(my_home_document);
1.2 timbl 986: }
987: anchor = (HTParentAnchor*) HTAnchor_findAddress(ref);
988: free(ref);
989: return anchor;
1.1 timbl 990: }
1.26 frystyk 991:
992:
993: /* Bind an Anchor to the request structure
994: ** ---------------------------------------
995: **
996: ** On Entry,
997: ** anchor The child or parenet anchor to be binded
998: ** request The request sturcture
999: ** On Exit,
1000: ** returns YES Success
1001: ** NO Failure
1002: **
1003: ** Note: Actually the same as HTLoadAnchor() but DOES NOT do the loading
1004: ** Henrik Frystyk 17/02-94
1005: */
1006:
1007: PUBLIC BOOL HTBindAnchor ARGS2(HTAnchor*, anchor, HTRequest *, request)
1008: {
1009: if (!anchor) return NO; /* No link */
1010:
1011: request->anchor = HTAnchor_parent(anchor);
1012: request->childAnchor = ((HTAnchor*)request->anchor == anchor) ? NULL
1013: : (HTChildAnchor*) anchor;
1014:
1.29 frystyk 1015: return YES;
1.26 frystyk 1016: } /* HTBindAnchor */
1.39 luotonen 1017:
1018:
1019:
1020: /*
1021: * Error diagnostics
1022: */
1023: PUBLIC void HTAddError ARGS2(HTRequest *, req,
1.40 luotonen 1024: CONST char *, msg)
1.39 luotonen 1025: {
1026: HTAddError2(req,msg,NULL);
1027: }
1028:
1029: PUBLIC void HTAddError2 ARGS3(HTRequest *, req,
1.40 luotonen 1030: CONST char *, msg,
1031: CONST char *, param)
1.39 luotonen 1032: {
1033: int mlen = msg ? strlen(msg) : 0;
1034: int plen = param ? strlen(param) : 0;
1035: char * str;
1036:
1037: if (!req) return;
1038: if (!req->error_stack) req->error_stack = HTList_new();
1039:
1040: str = (char*)malloc(mlen + plen + 2);
1041: if (!str) outofmem(__FILE__,"HTAddError2");
1042:
1043: if (msg) strcpy(str,msg);
1044: strcpy(str+mlen," ");
1045: if (param) strcpy(str+mlen+1,param);
1046:
1047: HTList_addObject(req->error_stack, (void*)str);
1048: CTRACE(stderr, "libwww error: %s\n", str);
1049: }
1050:
1051: PUBLIC void HTAddErrorN ARGS3(HTRequest *, req,
1.40 luotonen 1052: CONST char *, msg,
1.39 luotonen 1053: int, num)
1054: {
1055: char buf[20];
1056: sprintf(buf,"%d",num);
1057: HTAddError2(req,msg,buf);
1058: }
1059:
1060: PUBLIC void HTClearErrors ARGS1(HTRequest *, req)
1061: {
1062: if (req && req->error_stack) {
1063: HTList * cur = req->error_stack;
1064: char * str;
1065: while ((str = (char*)HTList_nextObject(cur)))
1066: free(str);
1067: HTList_delete(req->error_stack);
1068: req->error_stack = NULL;
1069: }
1070: }
1.26 frystyk 1071:
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