Annotation of Amaya/amaya/AHTURLTools.c, revision 1.37
1.7 cvs 1: /*
2: *
3: * (c) COPYRIGHT MIT and INRIA, 1996.
4: * Please first read the full copyright statement in file COPYRIGHT.
5: *
6: */
1.9 cvs 7:
1.10 cvs 8: /*
9: * AHTURLTools.c: contains all the functions for testing, manipulating,
1.25 cvs 10: * and normalizing URLs. It also contains a local copy of the libWWW
11: * URL parsing functions.
1.10 cvs 12: *
13: * Authors: J. Kahan, I. Vatton
14: *
15: */
1.7 cvs 16:
1.15 cvs 17: #define THOT_EXPORT extern
1.3 cvs 18: #include "amaya.h"
19:
1.8 cvs 20: #include "init_f.h"
21: #include "AHTURLTools_f.h"
22:
1.24 cvs 23: #define MAX_PRINT_URL_LENGTH 50
1.29 cvs 24: typedef struct _HTURI {
25: char * access; /* Now known as "scheme" */
26: char * host;
27: char * absolute;
28: char * relative;
29: char * fragment;
30: } HTURI;
1.24 cvs 31:
1.28 cvs 32:
33: /*----------------------------------------------------------------------
34: ConvertToLowerCase
35: Converts a string to lowercase.
36: ----------------------------------------------------------------------*/
1.22 cvs 37: #ifdef __STDC__
1.28 cvs 38: static void ConvertToLowerCase (char *string)
39: #else /* __STDC__ */
40: static void ConvertToLowerCase (string)
41: char *string;
42:
43: #endif /* __STDC__ */
44: {
45: int i;
46:
47: if (!string)
48: return;
49:
50: for (i = 0; string[i] != EOS; i++)
51: string[i] = tolower (string[i]);
52: }
1.22 cvs 53:
1.8 cvs 54: /*----------------------------------------------------------------------
1.11 cvs 55: ExplodeURL
1.8 cvs 56: ----------------------------------------------------------------------*/
57: #ifdef __STDC__
58: void ExplodeURL (char *url, char **proto, char **host, char **dir, char **file)
59: #else
60: void ExplodeURL (url, proto, host, dir, file)
61: char *url;
62: char **proto;
63: char **host;
64: char **dir;
65: char **file;
66:
67: #endif
68: {
1.33 cvs 69: char *curr, *temp;
70: char used_sep;
1.32 cvs 71:
1.33 cvs 72: if (url && strchr (url, URL_SEP))
73: used_sep = URL_SEP;
74: else
75: used_sep = DIR_SEP;
1.8 cvs 76:
77: if ((url == NULL) || (proto == NULL) || (host == NULL) ||
78: (dir == NULL) || (file == NULL))
79: return;
80:
81: /* initialize every pointer */
82: *proto = *host = *dir = *file = NULL;
83:
84: /* skip any leading space */
85: while ((*url == SPACE) || (*url == TAB))
86: url++;
1.9 cvs 87: curr = url;
88: if (*curr == 0)
1.8 cvs 89: goto finished;
90:
91: /* go to the end of the URL */
1.9 cvs 92: while ((*curr != 0) && (*curr != SPACE) && (*curr != '\b') &&
93: (*curr != '\r') && (*curr != EOL))
94: curr++;
1.8 cvs 95:
96: /* mark the end of the chain */
1.9 cvs 97: *curr = EOS;
98: curr--;
99: if (curr <= url)
1.8 cvs 100: goto finished;
101:
102: /* search the next DIR_SEP indicating the beginning of the file name */
103: do
1.11 cvs 104: curr--;
1.33 cvs 105: while ((curr >= url) && (*curr != used_sep));
1.11 cvs 106:
1.9 cvs 107: if (curr < url)
1.8 cvs 108: goto finished;
1.9 cvs 109: *file = curr + 1;
1.8 cvs 110:
111: /* mark the end of the dir */
1.9 cvs 112: *curr = EOS;
113: curr--;
114: if (curr < url)
1.8 cvs 115: goto finished;
116:
1.29 cvs 117: /* search for the DIR_STR indicating the host name start */
1.33 cvs 118: while ((curr > url) && ((*curr != used_sep) || (*(curr + 1) != used_sep)))
1.9 cvs 119: curr--;
1.8 cvs 120:
121: /* if we found it, separate the host name from the directory */
1.33 cvs 122: if ((*curr == DIR_SEP) && (*(curr + 1) == used_sep))
1.8 cvs 123: {
1.9 cvs 124: *host = temp = curr + 2;
1.33 cvs 125: while ((*temp != 0) && (*temp != used_sep))
1.8 cvs 126: temp++;
1.33 cvs 127: if (*temp == used_sep)
1.8 cvs 128: {
129: *temp = EOS;
130: *dir = temp + 1;
131: }
132: }
133: else
1.11 cvs 134: *dir = curr;
135:
1.9 cvs 136: if (curr <= url)
1.8 cvs 137: goto finished;
138:
139: /* mark the end of the proto */
1.9 cvs 140: *curr = EOS;
141: curr--;
142: if (curr < url)
1.8 cvs 143: goto finished;
144:
1.32 cvs 145: if (*curr == ':')
1.8 cvs 146: {
1.9 cvs 147: *curr = EOS;
148: curr--;
1.8 cvs 149: }
150: else
151: goto finished;
1.11 cvs 152:
1.9 cvs 153: if (curr < url)
1.8 cvs 154: goto finished;
1.9 cvs 155: while ((curr > url) && (isalpha (*curr)))
156: curr--;
157: *proto = curr;
1.8 cvs 158:
159: finished:;
160:
161: #ifdef AMAYA_DEBUG
162: fprintf (stderr, "ExplodeURL(%s)\n\t", url);
163: if (*proto)
164: fprintf (stderr, "proto : %s, ", *proto);
165: if (*host)
166: fprintf (stderr, "host : %s, ", *host);
167: if (*dir)
168: fprintf (stderr, "dir : %s, ", *dir);
169: if (*file)
170: fprintf (stderr, "file : %s ", *file);
171: fprintf (stderr, "\n");
172: #endif
173:
174: }
1.3 cvs 175:
1.4 cvs 176: /*----------------------------------------------------------------------
1.9 cvs 177: IsHTMLName
178: returns TRUE if path points to an HTML resource.
1.4 cvs 179: ----------------------------------------------------------------------*/
1.3 cvs 180: #ifdef __STDC__
1.34 cvs 181: boolean IsHTMLName (const char *path)
1.3 cvs 182: #else /* __STDC__ */
183: boolean IsHTMLName (path)
1.34 cvs 184: const char *path;
1.3 cvs 185: #endif /* __STDC__ */
186: {
1.5 cvs 187: char temppath[MAX_LENGTH];
188: char suffix[MAX_LENGTH];
189: char nsuffix[MAX_LENGTH];
190: int i;
191:
192: if (!path)
1.37 ! cvs 193: return (FALSE);
1.5 cvs 194:
195: strcpy (temppath, path);
196: ExtractSuffix (temppath, suffix);
197:
198: /* Normalize the suffix */
199: i = 0;
200: while (suffix[i] != EOS)
1.13 cvs 201: {
1.25 cvs 202: nsuffix[i] = tolower (suffix[i]);
1.13 cvs 203: i++;
204: }
1.5 cvs 205: nsuffix[i] = EOS;
206: if ((strcmp (nsuffix, "html")) &&
207: (strcmp (nsuffix, "htm")) &&
208: (strcmp (nsuffix, "shtml")))
1.13 cvs 209: return (FALSE);
1.22 cvs 210: else if (!strcmp (nsuffix, "gz"))
1.13 cvs 211: {
212: /* take in account compressed files */
213: ExtractSuffix (temppath, suffix);
214: /* Normalize the suffix */
215: i = 0;
216: while (suffix[i] != EOS)
217: {
1.25 cvs 218: nsuffix[i] = tolower (suffix[i]);
1.13 cvs 219: i++;
220: }
221: nsuffix[i] = EOS;
222: if ((strcmp (nsuffix, "html")) &&
223: (strcmp (nsuffix, "htm")) &&
224: (strcmp (nsuffix, "shtml")))
225: return (FALSE);
226: else
227: return (TRUE);
228: }
229: else
230: return (TRUE);
1.3 cvs 231: }
232:
1.4 cvs 233: /*----------------------------------------------------------------------
1.9 cvs 234: IsImageName
235: returns TRUE if path points to an image resource.
1.4 cvs 236: ----------------------------------------------------------------------*/
1.3 cvs 237: #ifdef __STDC__
1.34 cvs 238: boolean IsImageName (const char *path)
1.3 cvs 239: #else /* __STDC__ */
240: boolean IsImageName (path)
1.34 cvs 241: const char *path;
1.3 cvs 242: #endif /* __STDC__ */
243: {
1.5 cvs 244: char temppath[MAX_LENGTH];
245: char suffix[MAX_LENGTH];
246: char nsuffix[MAX_LENGTH];
247: int i;
248:
249: if (!path)
1.13 cvs 250: return (FALSE);
1.5 cvs 251:
252: strcpy (temppath, path);
253: ExtractSuffix (temppath, suffix);
254:
255: /* Normalize the suffix */
256: i = 0;
257: while (suffix[i] != EOS)
1.13 cvs 258: {
1.25 cvs 259: nsuffix[i] = tolower (suffix[i]);
1.13 cvs 260: i++;
261: }
1.5 cvs 262: nsuffix[i] = EOS;
263: if ((strcmp (nsuffix, "gif")) && (strcmp (nsuffix, "xbm")) &&
264: (strcmp (nsuffix, "xpm")) && (strcmp (nsuffix, "jpg")) &&
265: (strcmp (nsuffix, "png")) && (strcmp (nsuffix, "au")))
1.13 cvs 266: return (FALSE);
267: return (TRUE);
1.3 cvs 268: }
269:
1.4 cvs 270: /*----------------------------------------------------------------------
1.9 cvs 271: IsTextName
1.4 cvs 272: ----------------------------------------------------------------------*/
1.3 cvs 273: #ifdef __STDC__
1.34 cvs 274: boolean IsTextName (const char *path)
1.3 cvs 275: #else /* __STDC__ */
276: boolean IsTextName (path)
1.34 cvs 277: const char *path;
1.3 cvs 278:
279: #endif /* __STDC__ */
280: {
1.5 cvs 281: char temppath[MAX_LENGTH];
282: char suffix[MAX_LENGTH];
283: char nsuffix[MAX_LENGTH];
284: int i;
285:
286: if (!path)
1.13 cvs 287: return (FALSE);
1.5 cvs 288:
289: strcpy (temppath, path);
290: ExtractSuffix (temppath, suffix);
291:
292: /* Normalize the suffix */
293: i = 0;
294: while (suffix[i] != EOS)
295: {
1.25 cvs 296: nsuffix[i] = tolower (suffix[i]);
1.5 cvs 297: i++;
298: }
299: nsuffix[i] = EOS;
300:
301: if ((strcmp (nsuffix, "gif")) && (strcmp (nsuffix, "xbm")) &&
302: (strcmp (nsuffix, "xpm")) && (strcmp (nsuffix, "jpg")) &&
303: (strcmp (nsuffix, "pdf")) && (strcmp (nsuffix, "png")) &&
1.22 cvs 304: (strcmp (nsuffix, "tgz")) && (strcmp (nsuffix, "tar")) &&
305: (strcmp (nsuffix, "xpg")) && (strcmp (nsuffix, "xpd")) &&
306: (strcmp (nsuffix, "ps")) && (strcmp (nsuffix, "au")))
1.13 cvs 307: return (TRUE);
1.22 cvs 308: else if (!strcmp (nsuffix, "gz"))
1.13 cvs 309: {
310: /* take in account compressed files */
311: ExtractSuffix (temppath, suffix);
312: /* Normalize the suffix */
313: i = 0;
314: while (suffix[i] != EOS)
315: {
1.25 cvs 316: nsuffix[i] = tolower (suffix[i]);
1.13 cvs 317: i++;
318: }
319: nsuffix[i] = EOS;
320: if ((!strcmp (nsuffix, "html")) ||
321: (!strcmp (nsuffix, "htm")) ||
322: (!strcmp (nsuffix, "shtml")))
323: return (TRUE);
324: else
325: return (FALSE);
326: }
327: else
328: return (FALSE);
1.3 cvs 329: }
330:
1.4 cvs 331: /*----------------------------------------------------------------------
1.9 cvs 332: IsHTTPPath
333: returns TRUE if path is in fact an http URL.
1.4 cvs 334: ----------------------------------------------------------------------*/
1.3 cvs 335: #ifdef __STDC__
1.34 cvs 336: boolean IsHTTPPath (const char *path)
1.3 cvs 337: #else /* __STDC__ */
338: boolean IsHTTPPath (path)
1.34 cvs 339: const char *path;
1.3 cvs 340: #endif /* __STDC__ */
341: {
1.5 cvs 342: if (!path)
343: return FALSE;
1.3 cvs 344:
1.5 cvs 345: if (strncmp (path, "http:", 5) != 0)
346: return FALSE;
347: return TRUE;
1.3 cvs 348: }
349:
1.4 cvs 350: /*----------------------------------------------------------------------
1.9 cvs 351: IsWithParameters
352: returns TRUE if url has a concatenated query string.
1.4 cvs 353: ----------------------------------------------------------------------*/
1.3 cvs 354: #ifdef __STDC__
1.34 cvs 355: boolean IsWithParameters (const char *url)
1.3 cvs 356: #else /* __STDC__ */
1.9 cvs 357: boolean IsWithParameters (url)
1.34 cvs 358: const char *url;
1.3 cvs 359: #endif /* __STDC__ */
360: {
1.5 cvs 361: int i;
1.3 cvs 362:
1.9 cvs 363: if ((!url) || (url[0] == EOS))
1.5 cvs 364: return FALSE;
1.3 cvs 365:
1.9 cvs 366: i = strlen (url) - 1;
367: while (i > 0 && url[i--] != '?')
1.5 cvs 368: if (i < 0)
369: return FALSE;
1.3 cvs 370:
1.5 cvs 371: /* There is a parameter */
372: return TRUE;
1.3 cvs 373: }
374:
1.4 cvs 375: /*----------------------------------------------------------------------
1.9 cvs 376: IsW3Path
377: returns TRUE if path is in fact a URL.
1.4 cvs 378: ----------------------------------------------------------------------*/
1.3 cvs 379: #ifdef __STDC__
1.34 cvs 380: boolean IsW3Path (const char *path)
1.3 cvs 381: #else /* __STDC__ */
382: boolean IsW3Path (path)
1.34 cvs 383: const char *path;
1.3 cvs 384: #endif /* __STDC__ */
385: {
1.5 cvs 386: if ((strncmp (path, "http:", 5)) && (strncmp (path, "ftp:", 4)) &&
387: (strncmp (path, "telnet:", 7)) && (strncmp (path, "wais:", 5)) &&
388: (strncmp (path, "news:", 5)) && (strncmp (path, "gopher:", 7)) &&
389: (strncmp (path, "mailto:", 7)) && (strncmp (path, "archie:", 7)))
390: return FALSE;
391: return TRUE;
1.3 cvs 392: }
393:
1.4 cvs 394: /*----------------------------------------------------------------------
1.9 cvs 395: IsValidProtocol
396: returns true if the url protocol is supported by Amaya.
1.4 cvs 397: ----------------------------------------------------------------------*/
1.3 cvs 398: #ifdef __STDC__
1.34 cvs 399: boolean IsValidProtocol (const char *url)
1.3 cvs 400: #else /* __STDC__ */
1.9 cvs 401: boolean IsValidProtocol (url)
1.34 cvs 402: const char *url;
1.3 cvs 403: #endif /* __STDC__ */
404: {
1.26 cvs 405: if (!strncmp (url, "http:", 5))
1.22 cvs 406: /* experimental */
1.26 cvs 407: /*** || !strncmp (url, "ftp:", 4)) ***/
1.24 cvs 408: /*** || !strncmp (path, "news:", 5)***/
1.8 cvs 409: return (TRUE);
1.5 cvs 410: else
1.8 cvs 411: return (FALSE);
1.3 cvs 412: }
413:
1.31 cvs 414:
415: /*----------------------------------------------------------------------
416: GetBaseURL
417: normalizes orgName according to a base associated with doc, and
418: following the standard URL format rules.
419: The function returns the base used to solve relative URL and SRC:
420: - the base of the document,
421: - or the document path (without document name).
422: ----------------------------------------------------------------------*/
423: #ifdef __STDC__
424: char *GetBaseURL (Document doc)
425: #else /* __STDC__ */
426: char *GetBaseURL (doc)
427: Document doc;
428: #endif /* __STDC__ */
429: {
430: Element el;
431: ElementType elType;
432: AttributeType attrType;
433: Attribute attr;
1.34 cvs 434: char used_sep = URL_SEP;
1.33 cvs 435: char *used_str;
1.31 cvs 436: char *ptr, *basename;
437: int length;
438:
439: basename = TtaGetMemory (MAX_LENGTH);
440: strcpy (basename, DocumentURLs[doc]);
441: length = MAX_LENGTH -1;
442: /* get the root element */
443: el = TtaGetMainRoot (doc);
444: /* search the BASE element */
445: elType.ElSSchema = TtaGetDocumentSSchema (doc);
446: elType.ElTypeNum = HTML_EL_BASE;
447: el = TtaSearchTypedElement (elType, SearchInTree, el);
448: if (el)
449: {
450: /* The document has a BASE element -> Get the HREF attribute */
451: attrType.AttrSSchema = elType.ElSSchema;
452: attrType.AttrTypeNum = HTML_ATTR_HREF_;
453: attr = TtaGetAttribute (el, attrType);
454: if (attr)
455: {
456: /* Use the base path of the document */
457: TtaGiveTextAttributeValue (attr, basename, &length);
458: /* base and orgName have to be separated by a DIR_SEP */
459: length--;
1.32 cvs 460:
1.33 cvs 461: if (basename [0] != EOS && strchr (basename, URL_SEP))
462: {
463: used_str = URL_STR;
464: used_sep = URL_SEP;
465: }
466: else
467: {
468: used_str = DIR_STR;
469: used_sep = DIR_SEP;
470: }
1.32 cvs 471:
1.33 cvs 472: if (basename[0] != EOS && basename[length] != used_sep)
1.31 cvs 473: /* verify if the base has the form "protocol://server:port" */
474: {
1.33 cvs 475: ptr = AmayaParseUrl (basename, "", AMAYA_PARSE_ACCESS |
476: AMAYA_PARSE_HOST |
477: AMAYA_PARSE_PUNCTUATION);
1.31 cvs 478: if (ptr && !strcmp (ptr, basename))
479: {
480: /* it has this form, we complete it by adding a DIR_STR */
1.33 cvs 481: strcat (basename, used_str);
1.31 cvs 482: length++;
483: }
484: if (ptr)
485: TtaFreeMemory (ptr);
486: }
487: }
1.33 cvs 488: }
1.32 cvs 489: else
1.33 cvs 490: {
491: if (basename [0] != EOS && strchr (basename, URL_SEP))
492: {
493: used_str = URL_STR;
494: used_sep = URL_SEP;
495: }
496: else
497: {
498: used_str = DIR_STR;
499: used_sep = DIR_SEP;
500: }
501: }
502:
1.31 cvs 503: /* Remove anything after the last DIR_SEP char. If no such char is found,
504: * then search for the first ":" char, hoping that what's before that is a
505: * protocol. If found, end the string there. If neither char is found,
506: * then discard the whole base element.
507: */
508: length = strlen (basename) - 1;
509: /* search for the last DIR_SEP char */
1.33 cvs 510: while (length >= 0 && basename[length] != used_sep)
1.31 cvs 511: length--;
512: if (length >= 0)
513: /* found the last DIR_SEP char, end the string there */
514: basename[length + 1] = EOS;
515: else
516: /* search for the first PATH_STR char */
517: {
1.32 cvs 518: for (length = 0; basename[length] != ':' &&
1.31 cvs 519: basename[length] != EOS; length ++);
1.32 cvs 520: if (basename[length] == ':')
1.31 cvs 521: /* found, so end the string there */
522: basename[length + 1] = EOS;
523: else
524: /* not found, discard the base */
525: basename[0] = EOS;
526: }
527: return (basename);
528: }
529:
530:
1.4 cvs 531: /*----------------------------------------------------------------------
1.9 cvs 532: NormalizeURL
533: normalizes orgName according to a base associated with doc, and
534: following the standard URL format rules.
535: The function returns the new complete and normalized URL
1.12 cvs 536: or file name path (newName) and the name of the document (docName).
1.9 cvs 537: N.B. If the function can't find out what's the docName, it assigns
538: the name "noname.html".
1.4 cvs 539: ----------------------------------------------------------------------*/
1.3 cvs 540: #ifdef __STDC__
541: void NormalizeURL (char *orgName, Document doc, char *newName, char *docName)
542: #else /* __STDC__ */
543: void NormalizeURL (orgName, doc, newName, docName)
544: char *orgName;
545: Document doc;
546: char *newName;
547: char *docName;
548: #endif /* __STDC__ */
549: {
1.31 cvs 550: char *basename;
1.18 cvs 551: char tempOrgName[MAX_LENGTH];
1.5 cvs 552: char *ptr;
553: int length;
1.33 cvs 554: char used_sep;
555: char *used_str;
1.5 cvs 556:
557: if (!newName || !docName)
558: return;
1.18 cvs 559:
1.32 cvs 560: if (doc != 0)
1.33 cvs 561: basename = GetBaseURL (doc);
1.32 cvs 562: else
1.33 cvs 563: basename = (char *) NULL;
1.32 cvs 564:
1.33 cvs 565: if (strchr (orgName, URL_SEP) || (basename && strchr (basename, URL_SEP)))
566: {
567: used_str = URL_STR;
568: used_sep = URL_SEP;
569: }
570: else
571: {
572: used_str = DIR_STR;
573: used_sep = DIR_SEP;
574: }
1.32 cvs 575:
1.18 cvs 576: /*
1.31 cvs 577: * Clean orgName
578: * Make sure we have a complete orgName, without any leading or trailing
579: * white spaces, or trailinbg new lines
580: */
1.18 cvs 581:
1.5 cvs 582: ptr = orgName;
1.18 cvs 583: /* skip leading white space and new line characters */
1.19 cvs 584: while ((*ptr == ' ' || *ptr == EOL) && *ptr++ != EOS);
1.18 cvs 585: strcpy (tempOrgName, ptr);
586: /* clean trailing white space */
587: ptr = strchr (tempOrgName, ' ');
588: if (ptr)
589: *ptr = EOS;
590: /* clean trailing new lines */
1.19 cvs 591: ptr = strchr (tempOrgName, EOL);
1.5 cvs 592: if (ptr)
593: *ptr = EOS;
594:
1.18 cvs 595: /*
1.31 cvs 596: * Make orgName a complete URL
597: * If the URL does not include a protocol, then try to calculate
598: * one using the doc's base element (if it exists),
599: */
1.21 cvs 600: if (tempOrgName[0] == EOS)
601: {
602: newName[0] = EOS;
1.36 cvs 603: TtaFreeMemory (basename);
1.21 cvs 604: return;
605: }
606: else if (IsW3Path (tempOrgName))
607: {
608: /* the name is complete, go to the Sixth Step */
609: strcpy (newName, tempOrgName);
610: /* verify if the URL has the form "protocol://server:port" */
1.25 cvs 611: ptr = AmayaParseUrl (newName, "", AMAYA_PARSE_ACCESS | AMAYA_PARSE_HOST |
612: AMAYA_PARSE_PUNCTUATION);
1.21 cvs 613: if (ptr && !strcmp (ptr, newName))
614: {
1.29 cvs 615: /* it has this form, we complete it by adding a DIR_STR */
1.33 cvs 616: strcat (newName, used_str);
1.21 cvs 617: }
618: if (ptr)
1.25 cvs 619: TtaFreeMemory (ptr);
1.21 cvs 620: }
621: else if ( doc == 0)
1.19 cvs 622: /* the name is complete, go to the Sixth Step */
1.18 cvs 623: strcpy (newName, tempOrgName);
1.5 cvs 624: else
625: {
1.22 cvs 626:
1.31 cvs 627: /* Calculate the absolute URL, using the base or document URL */
1.32 cvs 628:
1.25 cvs 629: ptr = AmayaParseUrl (tempOrgName, basename, AMAYA_PARSE_ALL);
1.14 cvs 630: if (ptr)
631: {
1.29 cvs 632: SimplifyUrl (&ptr);
1.14 cvs 633: strcpy (newName, ptr);
1.25 cvs 634: TtaFreeMemory (ptr);
1.14 cvs 635: }
636: else
1.18 cvs 637: newName[0] = EOS;
1.5 cvs 638: }
1.36 cvs 639:
640: TtaFreeMemory (basename);
1.5 cvs 641:
1.18 cvs 642: /*
1.31 cvs 643: * Prepare the docname that will refer to this ressource in the
644: * .amaya directory. If the new URL finishes on DIR_SEP, then use
645: * noname.html as a default ressource name
1.18 cvs 646: */
1.19 cvs 647: if (newName[0] != EOS)
1.5 cvs 648: {
1.19 cvs 649: length = strlen (newName) - 1;
1.33 cvs 650: if (newName[length] == used_sep)
1.18 cvs 651: {
652: /* docname was not comprised inside the URL, so let's */
653: /* assign the default ressource name */
654: strcpy (docName, "noname.html");
655: /* remove DIR_SEP at the end of complete path */
1.23 cvs 656: /* newName[length] = EOS; */
1.18 cvs 657: }
1.14 cvs 658: else
1.18 cvs 659: {
660: /* docname is comprised inside the URL */
1.33 cvs 661: while (length >= 0 && newName[length] != used_sep)
1.18 cvs 662: length--;
663: if (length < 0)
664: strcpy (docName, newName);
665: else
666: strcpy (docName, &newName[length+1]);
667: }
1.19 cvs 668:
1.5 cvs 669: }
1.18 cvs 670: else
671: docName[0] = EOS;
672: }
1.3 cvs 673:
1.4 cvs 674: /*----------------------------------------------------------------------
1.9 cvs 675: IsSameHost
1.4 cvs 676: ----------------------------------------------------------------------*/
1.3 cvs 677: #ifdef __STDC__
1.34 cvs 678: boolean IsSameHost (const char *url1, const char *url2)
1.3 cvs 679: #else /* __STDC__ */
680: boolean IsSameHost (url1, url2)
1.34 cvs 681: const char *url1;
682: const char *url2;
1.3 cvs 683: #endif /* __STDC__ */
684: {
1.34 cvs 685: char *basename_ptr1, *basename_ptr2;
686: boolean result;
1.3 cvs 687:
1.25 cvs 688: basename_ptr1 = AmayaParseUrl (url1, "", AMAYA_PARSE_ACCESS | AMAYA_PARSE_HOST | AMAYA_PARSE_PUNCTUATION);
689: basename_ptr2 = AmayaParseUrl (url2, "", AMAYA_PARSE_ACCESS | AMAYA_PARSE_HOST | AMAYA_PARSE_PUNCTUATION);
1.3 cvs 690:
1.5 cvs 691: if (strcmp (basename_ptr1, basename_ptr2))
1.8 cvs 692: result = FALSE;
1.5 cvs 693: else
1.8 cvs 694: result = TRUE;
1.3 cvs 695:
1.25 cvs 696: TtaFreeMemory (basename_ptr1);
697: TtaFreeMemory (basename_ptr2);
1.5 cvs 698: return (result);
1.3 cvs 699: }
700:
701:
1.4 cvs 702: /*----------------------------------------------------------------------
1.22 cvs 703: HasKnownFileSuffix
704: returns TRUE if path points to a file ending with a suffix.
705: ----------------------------------------------------------------------*/
706: #ifdef __STDC__
1.34 cvs 707: boolean HasKnownFileSuffix (const char *path)
1.22 cvs 708: #else /* __STDC__ */
709: boolean HasKnownFileSuffix (path)
1.34 cvs 710: const char *path;
1.22 cvs 711: #endif /* __STDC__ */
712: {
1.29 cvs 713: char *root;
714: char temppath[MAX_LENGTH];
715: char suffix[MAX_LENGTH];
1.22 cvs 716:
1.24 cvs 717: if (!path || path[0] == EOS || path[strlen(path)] == DIR_SEP)
1.22 cvs 718: return (FALSE);
719:
1.29 cvs 720: root = AmayaParseUrl(path, "", AMAYA_PARSE_PATH | AMAYA_PARSE_PUNCTUATION);
1.22 cvs 721:
722: if (root)
723: {
724: strcpy (temppath, root);
1.25 cvs 725: TtaFreeMemory (root);
1.22 cvs 726: /* Get the suffix */
727: ExtractSuffix (temppath, suffix);
728:
729: if( suffix[0] == EOS)
730: /* no suffix */
731: return (FALSE);
732:
733: /* Normalize the suffix */
734: ConvertToLowerCase (suffix);
735:
1.23 cvs 736: if (!strcmp (suffix, "gz"))
1.22 cvs 737: /* skip the compressed suffix */
738: {
739: ExtractSuffix (temppath, suffix);
740: if(suffix[0] == EOS)
741: /* no suffix */
742: return (FALSE);
743: /* Normalize the suffix */
744: ConvertToLowerCase (suffix);
745: }
746:
747: if ((strcmp (suffix, "gif")) && (strcmp (suffix, "xbm")) &&
748: (strcmp (suffix, "xpm")) && (strcmp (suffix, "jpg")) &&
749: (strcmp (suffix, "pdf")) && (strcmp (suffix, "png")) &&
750: (strcmp (suffix, "tgz")) && (strcmp (suffix, "xpg")) &&
751: (strcmp (suffix, "xpd")) && (strcmp (suffix, "ps")) &&
752: (strcmp (suffix, "au")) && (strcmp (suffix, "html")) &&
753: (strcmp (suffix, "htm")) && (strcmp (suffix, "shtml")) &&
754: (strcmp (suffix, "txt")) && (strcmp (suffix, "css")) &&
755: (strcmp (suffix, "eps")))
756: return (FALSE);
757: else
758: return (TRUE);
759: }
760: else
761: return (FALSE);
762: }
763:
764:
765: /*----------------------------------------------------------------------
1.24 cvs 766: ChopURL
767: Gives back a URL no longer than MAX_PRINT_URL_LENGTH chars (outputURL).
768: If inputURL is bigger than that size, outputURL receives
769: MAX_PRINT_URL_LENGTH / 2 chars from the beginning of inputURL, "...",
770: and MAX_PRINT_URL_LENGTH / 2 chars from the end of inputURL.
771: If inputURL is not longer than MAX_PRINT_URL_LENGTH chars, it gets
772: copied into outputURL.
773: N.B.: outputURL must point to a memory block of MAX_PRINT_URL_LENGTH
774: chars.
775: ----------------------------------------------------------------------*/
776: #ifdef __STDC__
1.34 cvs 777: void ChopURL (char *outputURL, const char *inputURL)
1.24 cvs 778: #else
779: void ChopURL (outputURL, inputURL)
1.34 cvs 780: char *outputURL;
781: const char *inputURL;
1.24 cvs 782: #endif
1.22 cvs 783:
1.24 cvs 784: {
785: int len;
1.9 cvs 786:
1.24 cvs 787: len = strlen (inputURL);
788: if (len <= MAX_PRINT_URL_LENGTH)
1.29 cvs 789: strcpy (outputURL, inputURL);
1.24 cvs 790: else
791: /* make a truncated urlName on the status window */
792: {
793: strncpy (outputURL, inputURL, MAX_PRINT_URL_LENGTH / 2);
794: outputURL [MAX_PRINT_URL_LENGTH / 2] = EOS;
795: strcat (outputURL, "...");
796: strcat (outputURL, &(inputURL[len - MAX_PRINT_URL_LENGTH / 2 ]));
797: }
1.25 cvs 798: }
799:
800:
801: /*----------------------------------------------------------------------
802: scan
803: Scan a filename for its consituents
804: -----------------------------------
805:
806: On entry,
807: name points to a document name which may be incomplete.
808: On exit,
809: absolute or relative may be nonzero (but not both).
810: host, fragment and access may be nonzero if they were specified.
811: Any which are nonzero point to zero terminated strings.
812: ----------------------------------------------------------------------*/
813: #ifdef __STDC__
814: static void scan (char * name, HTURI * parts)
815: #else /* __STDC__ */
816: static void scan (name, parts)
817: char *name;
818: HTURI *parts;
819:
820: #endif /* __STDC__ */
821: {
1.28 cvs 822: char * p;
823: char * after_access = name;
1.33 cvs 824: char used_sep;
1.32 cvs 825:
1.33 cvs 826: if (name && strchr (name, URL_SEP))
827: {
828: used_sep = URL_SEP;
829: }
830: else
831: {
832: used_sep = DIR_SEP;
833: }
1.32 cvs 834:
1.28 cvs 835: memset(parts, '\0', sizeof(HTURI));
836: /* Look for fragment identifier */
837: if ((p = strrchr(name, '#')) != NULL)
838: {
839: *p++ = '\0';
840: parts->fragment = p;
1.25 cvs 841: }
842:
1.28 cvs 843: for (p=name; *p; p++)
844: {
1.33 cvs 845: if (*p==used_sep || *p=='#' || *p=='?')
1.28 cvs 846: break;
1.32 cvs 847: if (*p==':')
1.28 cvs 848: {
849: *p = 0;
850: parts->access = after_access; /* Scheme has been specified */
851:
852: /* The combination of gcc, the "-O" flag and the HP platform is
853: unhealthy. The following three lines is a quick & dirty fix, but is
854: not recommended. Rather, turn off "-O". */
855:
856: /* after_access = p;*/
857: /* while (*after_access == 0)*/
858: /* after_access++;*/
859: after_access = p+1;
860: if (0==strcasecmp("URL", parts->access))
861: /* Ignore IETF's URL: pre-prefix */
862: parts->access = NULL;
863: else
1.25 cvs 864: break;
865: }
866: }
867:
868: p = after_access;
1.33 cvs 869: if (*p==used_sep)
1.28 cvs 870: {
1.33 cvs 871: if (p[1]==used_sep)
1.28 cvs 872: {
1.25 cvs 873: parts->host = p+2; /* host has been specified */
1.28 cvs 874: *p = 0; /* Terminate access */
875: /* look for end of host name if any */
1.33 cvs 876: p = strchr(parts->host,used_sep);
1.28 cvs 877: if (p)
878: {
1.25 cvs 879: *p=0; /* Terminate host */
880: parts->absolute = p+1; /* Root has been found */
1.28 cvs 881: }
882: }
883: else
884: /* Root found but no host */
885: parts->absolute = p+1;
886: }
887: else
888: {
1.25 cvs 889: parts->relative = (*after_access) ? after_access : 0; /* zero for "" */
1.28 cvs 890: }
1.25 cvs 891: }
892:
893:
894: /*----------------------------------------------------------------------
1.28 cvs 895: AmayaParseUrl: parse a Name relative to another name
896:
897: This returns those parts of a name which are given (and requested)
898: substituting bits from the related name where necessary.
1.25 cvs 899:
1.28 cvs 900: On entry,
1.25 cvs 901: aName A filename given
902: relatedName A name relative to which aName is to be parsed. Give
903: it an empty string if aName is absolute.
904: wanted A mask for the bits which are wanted.
905:
1.28 cvs 906: On exit,
1.25 cvs 907: returns A pointer to a malloc'd string which MUST BE FREED
908: ----------------------------------------------------------------------*/
909: #ifdef __STDC__
1.34 cvs 910: char *AmayaParseUrl (const char *aName, char *relatedName, int wanted)
1.25 cvs 911: #else /* __STDC__ */
1.28 cvs 912: char *AmayaParseUrl (aName, relatedName, wanted)
1.34 cvs 913: const char *aName;
1.28 cvs 914: char *relatedName;
915: int wanted;
1.25 cvs 916:
917: #endif /* __STDC__ */
918: {
1.29 cvs 919: char *return_value;
920: char result[MAX_LENGTH];
921: char name[MAX_LENGTH];
922: char rel[MAX_LENGTH];
923: char *p, *access;
924: HTURI given, related;
925: int len;
1.33 cvs 926: char used_sep;
927: char *used_str;
1.32 cvs 928:
1.33 cvs 929: if (strchr (aName, URL_SEP) || strchr (relatedName, URL_SEP) )
930: {
931: used_str = URL_STR;
932: used_sep = URL_SEP;
933: }
1.32 cvs 934: else
1.33 cvs 935: {
936: used_str = DIR_STR;
937: used_sep = DIR_SEP;
938: }
1.32 cvs 939:
1.29 cvs 940: /* Make working copies of input strings to cut up: */
941: return_value = NULL;
942: result[0] = 0; /* Clear string */
943: strcpy (name, aName);
944: if (relatedName != NULL)
945: strcpy (rel, relatedName);
946: else
947: relatedName[0] = EOS;
948:
949: scan (name, &given);
950: scan (rel, &related);
951: access = given.access ? given.access : related.access;
952: if (wanted & AMAYA_PARSE_ACCESS)
953: if (access)
954: {
955: strcat (result, access);
956: if(wanted & AMAYA_PARSE_PUNCTUATION)
1.32 cvs 957: strcat (result, ":");
1.29 cvs 958: }
959:
960: if (given.access && related.access)
961: /* If different, inherit nothing. */
962: if (strcmp (given.access, related.access) != 0)
963: {
964: related.host = 0;
965: related.absolute = 0;
966: related.relative = 0;
967: related.fragment = 0;
968: }
969:
970: if (wanted & AMAYA_PARSE_HOST)
971: if(given.host || related.host)
972: {
973: if(wanted & AMAYA_PARSE_PUNCTUATION)
974: strcat (result, "//");
975: strcat (result, given.host ? given.host : related.host);
976: }
977:
978: if (given.host && related.host)
979: /* If different hosts, inherit no path. */
980: if (strcmp(given.host, related.host) != 0)
981: {
982: related.absolute = 0;
983: related.relative = 0;
984: related.fragment = 0;
985: }
986:
987: if (wanted & AMAYA_PARSE_PATH)
988: {
989: if (given.absolute)
990: {
991: /* All is given */
992: if (wanted & AMAYA_PARSE_PUNCTUATION)
1.33 cvs 993: strcat (result, used_str);
1.29 cvs 994: strcat (result, given.absolute);
1.25 cvs 995: }
1.29 cvs 996: else if (related.absolute)
997: {
998: /* Adopt path not name */
1.33 cvs 999: strcat (result, used_str);
1.29 cvs 1000: strcat (result, related.absolute);
1001: if (given.relative)
1002: {
1003: /* Search part? */
1004: p = strchr (result, '?');
1005: if (!p)
1006: p=result+strlen(result)-1;
1.33 cvs 1007: for (; *p!=used_sep; p--); /* last / */
1.29 cvs 1008: /* Remove filename */
1009: p[1]=0;
1010: /* Add given one */
1011: strcat (result, given.relative);
1012: /*SimplifyUrl (&result);*/
1.25 cvs 1013: }
1014: }
1.29 cvs 1015: else if (given.relative)
1016: /* what we've got */
1017: strcat (result, given.relative);
1018: else if (related.relative)
1019: strcat (result, related.relative);
1020: else
1021: /* No inheritance */
1.33 cvs 1022: strcat (result, used_str);
1.25 cvs 1023: }
1.29 cvs 1024:
1025: if (wanted & AMAYA_PARSE_ANCHOR)
1026: if (given.fragment || related.fragment)
1027: {
1028: if (given.absolute && given.fragment)
1029: {
1030: /*Fixes for relURLs...*/
1031: if (wanted & AMAYA_PARSE_PUNCTUATION)
1032: strcat (result, "#");
1033: strcat (result, given.fragment);
1034: }
1035: else if (!(given.absolute) && !(given.fragment))
1036: strcat (result, "");
1037: else
1038: {
1039: if (wanted & AMAYA_PARSE_PUNCTUATION)
1040: strcat (result, "#");
1041: strcat (result, given.fragment ? given.fragment : related.fragment);
1042: }
1043: }
1044: len = strlen (result);
1045: if ((return_value = (char *) TtaGetMemory (len + 1)) != NULL)
1046: strcpy (return_value, result);
1047: return (return_value); /* exactly the right length */
1.25 cvs 1048: }
1049:
1050: /*----------------------------------------------------------------------
1051: HTCanon
1052: Canonicalizes the URL in the following manner starting from the host
1053: pointer:
1054:
1055: 1) The host name is converted to lowercase
1056: 2) Chop off port if `:80' (http), `:70' (gopher), or `:21' (ftp)
1057:
1058: Return: OK The position of the current path part of the URL
1059: which might be the old one or a new one.
1060:
1061: ----------------------------------------------------------------------*/
1062: #ifdef __STDC__
1.28 cvs 1063: static char *HTCanon (char ** filename, char * host)
1.25 cvs 1064: #else /* __STDC__ */
1.28 cvs 1065: static char *HTCanon (filename, host)
1066: char **filename;
1067: char *host;
1.25 cvs 1068: #endif /* __STDC__ */
1069: {
1070: char *newname = NULL;
1071: char *port;
1072: char *strptr;
1073: char *path;
1074: char *access = host-3;
1.33 cvs 1075: char used_sep;
1.32 cvs 1076:
1077:
1.33 cvs 1078: if (*filename && strchr (*filename, URL_SEP))
1079: {
1080: used_sep = URL_SEP;
1081: }
1082: else
1083: {
1084: used_sep = DIR_SEP;
1085: }
1.32 cvs 1086:
1.33 cvs 1087: while (access>*filename && *(access-1)!= used_sep) /* Find access method */
1.25 cvs 1088: access--;
1.33 cvs 1089: if ((path = strchr(host, used_sep)) == NULL) /* Find path */
1.25 cvs 1090: path = host + strlen(host);
1091: if ((strptr = strchr(host, '@')) != NULL && strptr<path) /* UserId */
1092: host = strptr;
1.32 cvs 1093: if ((port = strchr(host, ':')) != NULL && port>path) /* Port number */
1.25 cvs 1094: port = NULL;
1095:
1096: strptr = host; /* Convert to lower-case */
1.33 cvs 1097: while (strptr<path)
1098: {
1.25 cvs 1099: *strptr = tolower(*strptr);
1100: strptr++;
1.33 cvs 1101: }
1.25 cvs 1102:
1103: /* Does the URL contain a full domain name? This also works for a
1104: numerical host name. The domain name is already made lower-case
1105: and without a trailing dot. */
1106: {
1.33 cvs 1107: char *dot = port ? port : path;
1108: if (dot > *filename && *--dot=='.')
1109: {
1110: char *orig=dot, *dest=dot+1;
1111: while((*orig++ = *dest++));
1112: if (port) port--;
1113: path--;
1.25 cvs 1114: }
1115: }
1116: /* Chop off port if `:', `:80' (http), `:70' (gopher), or `:21' (ftp) */
1.33 cvs 1117: if (port)
1118: {
1119: if (!*(port+1) || *(port+1)==used_sep)
1120: {
1121: if (!newname)
1122: {
1.25 cvs 1123: char *orig=port, *dest=port+1;
1124: while((*orig++ = *dest++));
1.33 cvs 1125: }
1126: }
1127: else if ((!strncmp(access, "http", 4) &&
1128: (*(port+1)=='8'&&*(port+2)=='0'&&(*(port+3)==used_sep||!*(port+3)))) ||
1129: (!strncmp(access, "gopher", 6) &&
1130: (*(port+1)=='7'&&*(port+2)=='0'&&(*(port+3)==used_sep||!*(port+3)))) ||
1131: (!strncmp(access, "ftp", 3) &&
1132: (*(port+1)=='2'&&*(port+2)=='1'&&(*(port+3)==used_sep||!*(port+3))))) {
1133: if (!newname)
1134: {
1135: char *orig=port, *dest=port+3;
1136: while((*orig++ = *dest++));
1137: /* Update path position, Henry Minsky */
1138: path -= 3;
1.25 cvs 1139: }
1.33 cvs 1140: }
1141: else if (newname)
1142: strncat(newname, port, (int) (path-port));
1143: }
1.25 cvs 1144:
1.33 cvs 1145: if (newname)
1146: {
1.25 cvs 1147: char *newpath = newname+strlen(newname);
1148: strcat(newname, path);
1149: path = newpath;
1.28 cvs 1150: /* Free old copy */
1151: TtaFreeMemory(*filename);
1.25 cvs 1152: *filename = newname;
1.33 cvs 1153: }
1.25 cvs 1154: return path;
1155: }
1156:
1157:
1158: /*----------------------------------------------------------------------
1.29 cvs 1159: SimplifyUrl: simplify a URI
1.32 cvs 1160: A URI is allowed to contain the sequence xxx/../ which may be
1161: replaced by "" , and the sequence "/./" which may be replaced by DIR_STR.
1.28 cvs 1162: Simplification helps us recognize duplicate URIs.
1.25 cvs 1163:
1.28 cvs 1164: Thus, /etc/junk/../fred becomes /etc/fred
1165: /etc/junk/./fred becomes /etc/junk/fred
1.25 cvs 1166:
1.28 cvs 1167: but we should NOT change
1168: http://fred.xxx.edu/../..
1.25 cvs 1169:
1170: or ../../albert.html
1171:
1.28 cvs 1172: In order to avoid empty URLs the following URLs become:
1.25 cvs 1173:
1174: /fred/.. becomes /fred/..
1175: /fred/././.. becomes /fred/..
1176: /fred/.././junk/.././ becomes /fred/..
1177:
1.28 cvs 1178: If more than one set of `://' is found (several proxies in cascade) then
1179: only the part after the last `://' is simplified.
1.25 cvs 1180:
1.28 cvs 1181: Returns: A string which might be the old one or a new one.
1.25 cvs 1182: ----------------------------------------------------------------------*/
1183: #ifdef __STDC__
1.29 cvs 1184: void SimplifyUrl (char ** url)
1.25 cvs 1185: #else /* __STDC__ */
1.29 cvs 1186: void SimplifyUrl (url)
1.28 cvs 1187: char **url;
1.25 cvs 1188: #endif /* __STDC__ */
1189: {
1.28 cvs 1190: char *path, *p;
1191: char *newptr, *access;
1192: char *orig, *dest, *end;
1193:
1.33 cvs 1194: char used_sep;
1.32 cvs 1195:
1196:
1.28 cvs 1197: if (!url || !*url)
1198: return;
1199:
1.33 cvs 1200: if (strchr (*url, URL_SEP))
1201: {
1202: used_sep = URL_SEP;
1203: }
1.32 cvs 1204: else
1.33 cvs 1205: {
1206: used_sep = DIR_SEP;
1207: }
1.32 cvs 1208:
1.28 cvs 1209: /* Find any scheme name */
1210: if ((path = strstr(*url, "://")) != NULL)
1.33 cvs 1211: {
1212: /* Find host name */
1.28 cvs 1213: access = *url;
1214: while (access<path && (*access=tolower(*access)))
1215: access++;
1216: path += 3;
1217: while ((newptr = strstr(path, "://")) != NULL)
1218: /* For proxies */
1219: path = newptr+3;
1220: /* We have a host name */
1221: path = HTCanon(url, path);
1.25 cvs 1222: }
1.28 cvs 1223: else if ((path = strstr(*url, ":/")) != NULL)
1224: path += 2;
1225: else
1226: path = *url;
1.25 cvs 1227:
1.33 cvs 1228: if (*path == used_sep && *(path+1)==used_sep)
1.28 cvs 1229: /* Some URLs start //<foo> */
1230: path += 1;
1231: else if (!strncmp(path, "news:", 5))
1232: {
1233: newptr = strchr(path+5, '@');
1234: if (!newptr)
1235: newptr = path + 5;
1236: while (*newptr)
1237: {
1238: /* Make group or host lower case */
1239: *newptr = tolower (*newptr);
1240: newptr++;
1.25 cvs 1241: }
1.28 cvs 1242: /* Doesn't need to do any more */
1243: return;
1.25 cvs 1244: }
1.28 cvs 1245:
1246: if ((p = path))
1247: {
1248: if (!((end = strchr (path, ';')) || (end = strchr (path, '?')) ||
1249: (end = strchr (path, '#'))))
1250: end = path + strlen (path);
1251:
1252: /* Parse string second time to simplify */
1253: p = path;
1254: while (p < end)
1255: {
1.33 cvs 1256: if (*p==used_sep)
1.28 cvs 1257: {
1.33 cvs 1258: if (p > *url && *(p+1) == '.' && (*(p+2) == used_sep || !*(p+2)))
1.28 cvs 1259: {
1260: orig = p + 1;
1.33 cvs 1261: dest = (*(p+2)!=used_sep) ? p+2 : p+3;
1.28 cvs 1262: while ((*orig++ = *dest++)); /* Remove a slash and a dot */
1263: end = orig - 1;
1264: }
1.33 cvs 1265: else if (*(p+1)=='.' && *(p+2)=='.' && (*(p+3)==used_sep || !*(p+3)))
1.28 cvs 1266: {
1267: newptr = p;
1.33 cvs 1268: while (newptr>path && *--newptr!=used_sep); /* prev slash */
1.28 cvs 1269: if (strncmp(newptr, "/../", 4))
1270: {
1271: orig = newptr + 1;
1.33 cvs 1272: dest = (*(p+3)!=used_sep) ? p+3 : p+4;
1.28 cvs 1273: while ((*orig++ = *dest++)); /* Remove /xxx/.. */
1274: end = orig-1;
1275: /* Start again with prev slash */
1276: p = newptr;
1.25 cvs 1277: }
1.28 cvs 1278: else
1.25 cvs 1279: p++;
1.28 cvs 1280: }
1.33 cvs 1281: else if (*(p+1) == used_sep)
1.28 cvs 1282: {
1.33 cvs 1283: while (*(p+1) == used_sep)
1.28 cvs 1284: {
1285: orig = p;
1286: dest = p + 1;
1287: while ((*orig++ = *dest++)); /* Remove multiple /'s */
1288: end = orig-1;
1289: }
1290: }
1291: else
1.25 cvs 1292: p++;
1.28 cvs 1293: }
1294: else
1295: p++;
1.25 cvs 1296: }
1297: }
1.28 cvs 1298: return;
1299: }
1300:
1301:
1302: /*----------------------------------------------------------------------
1303: NormalizeFile normalizes local names.
1304: Return TRUE if target and src differ.
1305: ----------------------------------------------------------------------*/
1306: #ifdef __STDC__
1307: boolean NormalizeFile (char *src, char *target)
1308: #else
1309: boolean NormalizeFile (src, target)
1310: char *src;
1311: char *target;
1312:
1313: #endif
1314: {
1315: char *s;
1316: boolean change;
1317:
1318: change = FALSE;
1319: if (src[0] == '~')
1320: {
1321: /* replace ~ */
1322: s = (char *) TtaGetEnvString ("HOME");
1323: strcpy (target, s);
1324: strcat (target, &src[1]);
1325: change = TRUE;
1326: }
1327: else if (strncmp (src, "file:", 5) == 0)
1328: {
1329: /* remove the prefix file: */
1330: if (src[5] == EOS)
1331: strcpy (target, DIR_STR);
1332: else if (src[0] == '~')
1333: {
1334: /* replace ~ */
1335: s = (char *) TtaGetEnvString ("HOME");
1336: strcpy (target, s);
1337: strcat (target, &src[5]);
1338: }
1339: else
1340: strcpy (target, &src[5]);
1341: change = TRUE;
1342: }
1343: else
1344: strcpy (target, src);
1345:
1346: /* remove /../ and /./ */
1.29 cvs 1347: SimplifyUrl (&target);
1.28 cvs 1348: return (change);
1.25 cvs 1349: }
1350:
1.28 cvs 1351:
1.25 cvs 1352: /*----------------------------------------------------------------------
1.31 cvs 1353: MakeRelativeURL: make relative name
1.25 cvs 1354:
1.28 cvs 1355: This function creates and returns a string which gives an expression of
1356: one address as related to another. Where there is no relation, an absolute
1357: address is retured.
1.25 cvs 1358:
1.28 cvs 1359: On entry,
1.25 cvs 1360: Both names must be absolute, fully qualified names of nodes
1361: (no fragment bits)
1362:
1.28 cvs 1363: On exit,
1.25 cvs 1364: The return result points to a newly allocated name which, if
1365: parsed by AmayaParseUrl relative to relatedName, will yield aName.
1366: The caller is responsible for freeing the resulting name later.
1367: ----------------------------------------------------------------------*/
1368: #ifdef __STDC__
1.31 cvs 1369: char *MakeRelativeURL (char *aName, char *relatedName)
1.25 cvs 1370: #else /* __STDC__ */
1.31 cvs 1371: char *MakeRelativeURL (aName, relatedName)
1.28 cvs 1372: char *aName;
1373: char *relatedName;
1.25 cvs 1374: #endif /* __STDC__ */
1375: {
1.29 cvs 1376: char *return_value;
1377: char result[MAX_LENGTH];
1378: char *p;
1.34 cvs 1379: char *q;
1.29 cvs 1380: char *after_access;
1381: char *last_slash = NULL;
1382: int slashes, levels, len;
1383:
1384: if (aName == NULL || relatedName == NULL)
1385: return (NULL);
1386:
1387: slashes = 0;
1388: after_access = NULL;
1389: p = aName;
1390: q = relatedName;
1391: for (; *p && (*p == *q); p++, q++)
1.27 cvs 1392: {
1393: /* Find extent of match */
1.32 cvs 1394: if (*p == ':')
1.29 cvs 1395: after_access = p + 1;
1.28 cvs 1396: if (*p == DIR_SEP)
1.27 cvs 1397: {
1.29 cvs 1398: /* memorize the last slash position and count them */
1.27 cvs 1399: last_slash = p;
1400: slashes++;
1.25 cvs 1401: }
1402: }
1403:
1.31 cvs 1404: /* q, p point to the first non-matching character or zero */
1405: if (*q == EOS)
1406: {
1407: /* New name is a subset of the related name */
1408: /* exactly the right length */
1409: len = strlen (p);
1410: if ((return_value = (char *) TtaGetMemory (len + 1)) != NULL)
1411: strcpy (return_value, p);
1412: }
1413: else if ((slashes < 2 && after_access == NULL)
1414: || (slashes < 3 && after_access != NULL))
1415: {
1416: /* Two names whitout common path */
1417: /* exactly the right length */
1418: len = strlen (aName);
1419: if ((return_value = (char *) TtaGetMemory (len + 1)) != NULL)
1420: strcpy (return_value, aName);
1421: }
1422: else
1423: {
1424: /* Some path in common */
1425: if (slashes == 3 && strncmp (aName, "http:", 5) == 0)
1426: /* just the same server */
1427: strcpy (result, last_slash);
1428: else
1429: {
1430: levels= 0;
1431: for (; *q && (*q != '#'); q++)
1432: if (*q == DIR_SEP)
1433: levels++;
1434:
1435: result[0] = 0;
1436: for (;levels; levels--)
1437: strcat (result, "../");
1438: strcat (result, last_slash+1);
1439: }
1440:
1441: /* exactly the right length */
1442: len = strlen (result);
1443: if ((return_value = (char *) TtaGetMemory (len + 1)) != NULL)
1444: strcpy (return_value, result);
1.25 cvs 1445: }
1.29 cvs 1446: return (return_value);
1.24 cvs 1447: }
1.35 cvs 1448:
1449:
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