Annotation of libwww/Library/src/HTGopher.c, revision 2.62
2.32 frystyk 1: /* HTGopher.c
2: ** GOPHER ACCESS
3: **
2.37 frystyk 4: ** (c) COPYRIGHT MIT 1995.
2.32 frystyk 5: ** Please first read the full copyright statement in the file COPYRIGH.
1.1 timbl 6: **
7: ** History:
8: ** 26 Sep 90 Adapted from other accesses (News, HTTP) TBL
9: ** 29 Nov 91 Downgraded to C, for portable implementation.
2.17 frystyk 10: ** 28 Apr 94 target no more global and icons implemented
2.39 frystyk 11: ** HF, frystyk@w3.org
2.19 luotonen 12: ** 2 May 94 Fixed possible security hole when the URL contains
13: ** a newline, that could cause multiple commands to be
14: ** sent to a Gopher server. AL, luotonen@www.cern.ch
2.20 frystyk 15: ** 12 May 94 Checked and made ready for multi-threads, Frystyk
2.27 duns 16: ** 8 Jul 94 FM Insulate free() from _free structure element.
2.42 frystyk 17: ** Sep 95 HFN Made non-blocking and state stream oriented
1.1 timbl 18: */
19:
2.20 frystyk 20: /* Library include files */
2.57 frystyk 21: #include "sysdep.h"
2.59 frystyk 22: #include "WWWUtil.h"
23: #include "WWWCore.h"
24: #include "WWWHTML.h"
25: #include "WWWDir.h"
2.60 frystyk 26: #include "WWWTrans.h"
2.43 frystyk 27: #include "HTNetMan.h"
2.20 frystyk 28: #include "HTGopher.h" /* Implemented here */
29:
30: /* Macros and other defines */
31: #ifndef GOPHER_PORT
32: #define GOPHER_PORT 70 /* See protocol spec */
33: #endif
1.2 timbl 34:
2.20 frystyk 35: /* Hypertext object building machinery */
2.17 frystyk 36: #define PUTC(c) (*target->isa->put_character)(target, c)
37: #define PUTS(s) (*target->isa->put_string)(target, s)
38: #define START(e) (*target->isa->start_element)(target, e, 0, 0)
39: #define END(e) (*target->isa->end_element)(target, e)
2.20 frystyk 40:
41: /* Type definitions and global variables etc. local to this module */
42: typedef enum _HTGopherType {
2.42 frystyk 43: GT_TEXT = '0',
44: GT_MENU = '1',
45: GT_CSO = '2',
46: GT_ERROR = '3',
47: GT_MACBINHEX = '4',
48: GT_PCBINHEX = '5',
49: GT_UUENCODED = '6',
50: GT_INDEX = '7',
51: GT_TELNET = '8',
52: GT_BINARY = '9',
53: GT_GIF = 'g',
54: GT_HTML = 'h', /* HTML */
55: GT_INFO = 'i',
56: GT_SOUND = 's',
57: GT_WWW = 'w', /* W3 address */
58: GT_IMAGE = 'I',
59: GT_TN3270 = 'T',
60: GT_DUPLICATE = '+',
61: GT_PLUS_IMAGE = ':', /* Addition from Gopher Plus */
62: GT_PLUS_MOVIE = ';',
63: GT_PLUS_SOUND = '<',
64: GT_EOF = '.'
2.20 frystyk 65: } HTGopherType;
66:
2.42 frystyk 67: /* Final states have negative value */
68: typedef enum _GopherState {
69: GOPHER_ERROR = -3,
70: GOPHER_NO_DATA = -2,
71: GOPHER_GOT_DATA = -1,
72: GOPHER_BEGIN = 0,
73: GOPHER_NEED_CONNECTION,
74: GOPHER_NEED_REQUEST,
75: GOPHER_NEED_RESPONSE
76: } GopherState;
1.2 timbl 77:
2.42 frystyk 78: /* This is the context structure for the this module */
2.20 frystyk 79: typedef struct _gopher_info {
2.30 frystyk 80: HTGopherType type; /* Gopher item type */
2.42 frystyk 81: GopherState state;
82: char * cmd;
2.20 frystyk 83: } gopher_info;
1.1 timbl 84:
2.42 frystyk 85: #define MAX_GOPHER_LINE 256
86:
87: struct _HTStructured {
2.57 frystyk 88: const HTStructuredClass * isa;
2.42 frystyk 89: };
90:
91: struct _HTStream {
2.57 frystyk 92: const HTStreamClass * isa;
2.42 frystyk 93: HTStructured * target;
94: HTRequest * request;
2.58 frystyk 95: HTEOLState state;
2.42 frystyk 96: char * url;
97: BOOL pre; /* Preformatted mode? */
98: BOOL junk; /* For too long lines */
99: BOOL CSO;
100: char cso_rec[10]; /* CSO record number */
101: char buffer[MAX_GOPHER_LINE+1];
102: int buflen;
103: };
104:
2.59 frystyk 105: struct _HTInputStream {
106: const HTInputStreamClass * isa;
107: };
108:
2.45 frystyk 109: PRIVATE HTDirShow dir_show = HT_DS_ICON;
110:
2.20 frystyk 111: /* ------------------------------------------------------------------------- */
1.1 timbl 112:
2.42 frystyk 113: /* GopherIcon
114: ** ----------
2.20 frystyk 115: ** This function finds an appopriate icon for the item in the gopher
2.61 frystyk 116: ** list. Actually it is only a shell build upon HTIcon_find().
2.17 frystyk 117: */
2.42 frystyk 118: PRIVATE HTIconNode *GopherIcon (HTGopherType type)
2.17 frystyk 119: {
2.36 frystyk 120: HTFormat content_type = NULL;
121: HTEncoding content_encoding = NULL;
2.45 frystyk 122: HTFileMode mode = HT_IS_FILE;
2.42 frystyk 123: switch(type) {
2.45 frystyk 124: case GT_MENU:
125: mode = HT_IS_DIR;
2.42 frystyk 126: case GT_TEXT:
2.17 frystyk 127: content_type = HTAtom_for("text/void");
128: break;
2.42 frystyk 129: case GT_IMAGE:
130: case GT_PLUS_IMAGE:
131: case GT_GIF:
2.17 frystyk 132: content_type = HTAtom_for("image/void");
133: break;
2.42 frystyk 134: case GT_WWW:
135: case GT_HTML:
2.17 frystyk 136: content_type = HTAtom_for("text/void");
137: break;
2.42 frystyk 138: case GT_SOUND:
139: case GT_PLUS_SOUND:
2.17 frystyk 140: content_type = HTAtom_for("audio/void");
141: break;
2.42 frystyk 142: case GT_PLUS_MOVIE:
2.20 frystyk 143: content_type = HTAtom_for("video/void");
2.17 frystyk 144: break;
2.42 frystyk 145: case GT_INDEX:
2.17 frystyk 146: content_type = HTAtom_for("application/x-gopher-index");
147: break;
2.42 frystyk 148: case GT_CSO:
2.17 frystyk 149: content_type = HTAtom_for("application/x-gopher-cso");
150: break;
2.42 frystyk 151: case GT_TELNET:
2.17 frystyk 152: content_type = HTAtom_for("application/x-gopher-telnet");
153: break;
2.42 frystyk 154: case GT_TN3270:
2.17 frystyk 155: content_type = HTAtom_for("application/x-gopher-tn3270");
156: break;
2.42 frystyk 157: case GT_DUPLICATE:
2.17 frystyk 158: content_type = HTAtom_for("application/x-gopher-duplicate");
159: break;
2.42 frystyk 160: case GT_ERROR:
2.17 frystyk 161: content_type = HTAtom_for("www/unknown");
162: break;
2.42 frystyk 163: case GT_BINARY:
2.36 frystyk 164: content_type = WWW_BINARY;
165: break;
2.17 frystyk 166: default:
167: content_type = HTAtom_for("www/unknown");
168: break;
169: }
2.61 frystyk 170: return HTIcon_find(mode, content_type, content_encoding);
2.17 frystyk 171: }
172:
2.42 frystyk 173: /* ------------------------------------------------------------------------- */
174: /* STREAMS */
175: /* ------------------------------------------------------------------------- */
2.17 frystyk 176:
2.42 frystyk 177: /* GopherTitle
178: ** -----------
179: ** Create the top part of the page
1.1 timbl 180: */
2.42 frystyk 181: PRIVATE BOOL GopherTitle (HTStream *me)
182: {
183: HTStructured *target = me->target;
184: char *str = NULL;
185: StrAllocCopy(str, me->CSO ? "CSO Search " : "GopherMenu");
2.28 frystyk 186:
2.42 frystyk 187: START(HTML_HTML);
188: START(HTML_HEAD);
189: START(HTML_TITLE);
190: if (me->CSO) {
191: char *keyword = strchr(me->url, '?');
192: if (keyword) {
193: StrAllocCat(str, "for ");
194: StrAllocCat(str, ++keyword);
195: }
196: }
197: PUTS(str);
198: END(HTML_TITLE);
199: END(HTML_HEAD);
2.26 frystyk 200:
2.42 frystyk 201: START(HTML_BODY);
202: START(HTML_H1);
203: PUTS(str);
204: END(HTML_H1);
2.55 frystyk 205: HT_FREE(str);
2.42 frystyk 206: return YES;
207: }
1.1 timbl 208:
2.42 frystyk 209: /* GopherBottom
210: ** ------------
211: ** Create the bottom part of the page
212: */
213: PRIVATE BOOL GopherBottom (HTStream *me)
214: {
215: HTStructured *target = me->target;
216: if (me->pre)
217: END(HTML_PRE);
218: END(HTML_BODY);
219: END(HTML_HTML);
220: return YES;
221: }
2.17 frystyk 222:
2.42 frystyk 223: /* GopherMenuLine
224: ** --------------
225: ** Parses a Gopher Menu Line
226: ** Return YES if more data else NO
227: */
228: PRIVATE BOOL GopherMenuLine (HTStream *me, char *line)
229: {
230: HTStructured *target = me->target;
231: HTGopherType gtype = (HTGopherType) *line++;
232: if (PROT_TRACE)
2.56 eric 233: HTTrace("HTGopher.... Menu line: `%s\'\n", line);
2.42 frystyk 234: if (gtype == GT_INFO) {
235: char *stop = strchr(line, '\t');
236: if (stop) *stop = '0円';
237: PUTS(line);
238: } else if (gtype == GT_ERROR) {
239: char *stop = strchr(line, '\t');
240: if (stop) *stop = '0円';
241: PUTS(line);
242: } else if ((strstr(line, "error.host") || strstr(line, "errorhost"))) {
243: char *stop = strchr(line, '\t'); /* Chop off error.host */
244: if (stop) *stop = '0円';
245: PUTS(line);
246: } else if (gtype == GT_EOF) {
247: return NO;
248: } else { /* Parse normal gopher menu line */
249: char *name = line; /* Get link information */
250: char *selector = strchr(name, '\t');
251: char *host = NULL;
252: char *port = NULL;
253: if (selector) {
254: *selector++ = '0円';
255: if ((host = strchr(selector, '\t'))) {
256: *host++ = '0円';
257: if ((port = strchr(host, '\t'))) {
258: char *junk;
259: *port = ':'; /* delimit host a la W3 */
260: if ((junk = strchr(port, '\t')) != NULL)
261: *junk = '0円'; /* Chop port */
262: if (*(port+1) == '0' && !*(port+2))
263: *port = '0円';
2.21 frystyk 264: }
2.42 frystyk 265: }
266: }
267: if (!me->pre) { /* For now we use preformatted listing */
268: START(HTML_PRE);
269: me->pre = YES;
270: }
2.45 frystyk 271: if (dir_show & HT_DS_ICON) { /* Put out the icon */
2.42 frystyk 272: HTIconNode *icon = GopherIcon(gtype);
2.52 frystyk 273: if (icon) {
2.61 frystyk 274: char * alt = HTIcon_alternative(icon, YES);
275: HTMLPutImg(target, HTIcon_url(icon), alt, NULL);
276: HT_FREE(alt);
2.42 frystyk 277: PUTC(' ');
278: }
279: }
280: if (gtype == GT_WWW) { /* Gopher pointer to W3 */
281: char *escaped = NULL;
282: escaped = HTEscape(selector, URL_PATH);
283: HTStartAnchor(target, NULL, escaped);
284: PUTS(name);
285: END(HTML_A);
2.55 frystyk 286: HT_FREE(escaped);
2.42 frystyk 287: } else if (port) { /* Other types need port */
288: char *escaped = NULL;
289: char *address = NULL;
290: int addr_len;
291:
292: /* Calculate the length of the WWW-address */
293: if (selector && *selector) {
294: escaped = HTEscape(selector, URL_PATH);
295: addr_len = 15 + strlen(escaped) + strlen(host) + 1;
296: } else {
297: addr_len = 15 + strlen(host) + 1;
298: }
2.55 frystyk 299: if ((address = (char *) HT_MALLOC(addr_len)) == NULL)
300: HT_OUTOFMEM("GopherMenuLine");
2.42 frystyk 301: *address = '0円';
302:
303: if (gtype == GT_TELNET) {
304: if (escaped)
305: sprintf(address, "telnet://%s@%s/", escaped, host);
306: else
307: sprintf(address, "telnet://%s/", host);
308: } else if (gtype == GT_TN3270) {
309: if (escaped)
310: sprintf(address, "tn3270://%s@%s/", escaped, host);
311: else
312: sprintf(address, "tn3270://%s/", host);
313: } else {
314: if (escaped)
315: sprintf(address, "//%s/%c%s", host, gtype, escaped);
316: else
317: sprintf(address, "//%s/%c", host, gtype);
318: }
319:
320: HTStartAnchor(target, NULL, address);
321: PUTS(name);
322: END(HTML_A);
2.55 frystyk 323: HT_FREE(address);
324: HT_FREE(escaped);
2.42 frystyk 325: PUTC('\n');
326: } else { /* If parse error */
327: if (PROT_TRACE)
2.56 eric 328: HTTrace("HTGopher.... Bad menu item, `%s\'\n", line);
2.42 frystyk 329: }
330: }
331: return YES;
332: }
2.21 frystyk 333:
2.42 frystyk 334: /* GopherCSOLine
335: ** --------------
336: ** Parses a Gopher Menu Line
337: ** Return YES if more data else NO
338: */
339: PRIVATE BOOL GopherCSOLine (HTStream *me, char *line)
340: {
341: HTStructured *target = me->target;
342: if (*line == '1') { /* Information line */
343: char *start = strchr(line, ':');
344: start = start ? ++start : line;
345: PUTS(start);
346: } else if (*line == '2') { /* Transfer complete */
347: return NO;
348: } else if (*line == '5') { /* Error */
349: char *start = strchr(line, ':');
350: start = start ? ++start : line;
351: PUTS(start);
352: } else if (*line == '-') { /* data */
353: /* data lines look like '-200:code:field:value'
354: * where code is the search result number and can be
355: * multiple digits (infinte?)
356: * find the second colon and check the digit to the
357: * left of it to see if they are diferent
358: * if they are then a different person is starting.
359: */
360: char *code;
361: char *field;
362: if ((code = strchr(line, ':')) && (field = strchr(++code, ':'))) {
363: BOOL newrec = YES;
364: *field++ = '0円';
365: if (!*me->cso_rec) { /* Header of first record */
366: START(HTML_DL);
367: } else if (strcmp(me->cso_rec, code)) { /* Another new record */
368: START(HTML_B);
369: } else
370: newrec = NO;
371: START(HTML_DT);
372:
373: /* I'm not sure whether the name field comes in any
374: * special order or if its even required in a
375: * record, so for now the first line is the header
376: * no matter what it is (it's almost always the
377: * alias)
378: */
379: {
380: char *value = strchr(field, ':');
381: if (!value)
382: value = "Empty value";
383: else
384: *value++ = '0円';
385: {
386: char *strip = HTStrip(field);
387: PUTS(strip);
388: START(HTML_DD);
389: strip = HTStrip(value);
390: if (newrec) {
391: PUTS(strip);
392: END(HTML_B);
2.20 frystyk 393: } else
2.42 frystyk 394: PUTS(strip);
395: }
2.20 frystyk 396:
2.42 frystyk 397: /* Save the code for comparison on the next pass */
398: strcpy(me->cso_rec, code);
2.20 frystyk 399: }
2.42 frystyk 400: }
401: } else { /* Unknown line */
402: char *start = strchr(line, ':');
403: start = start ? ++start : line;
404: PUTS(start);
2.20 frystyk 405: }
2.42 frystyk 406: return YES;
407: }
1.2 timbl 408:
2.42 frystyk 409: /*
410: ** Searches for Gopher line until buffer fills up or a CRLF or LF is found
411: */
2.57 frystyk 412: PRIVATE int GopherMenu_put_block (HTStream * me, const char * b, int l)
2.42 frystyk 413: {
414: while (l-- > 0) {
415: if (me->state == EOL_FCR) {
416: if (*b == LF && me->buflen) {
417: if (!me->junk) {
418: BOOL cont;
419: *(me->buffer+me->buflen) = '0円';
420: cont = me->CSO ? GopherCSOLine(me, me->buffer) :
421: GopherMenuLine(me, me->buffer);
422: if (cont == NO) return HT_LOADED;
423: } else
424: me->junk = NO; /* back to normal */
2.20 frystyk 425: }
2.45 frystyk 426: me->buflen = 0;
427: me->state = EOL_BEGIN;
2.42 frystyk 428: } else if (*b == CR) {
429: me->state = EOL_FCR;
430: } else if (*b == LF && me->buflen) {
431: if (!me->junk) {
432: BOOL cont;
433: *(me->buffer+me->buflen) = '0円';
434: cont = me->CSO ? GopherCSOLine(me, me->buffer) :
435: GopherMenuLine(me, me->buffer);
436: if (cont == NO) return HT_LOADED;
437: } else
438: me->junk = NO; /* back to normal */
439: me->buflen = 0;
440: me->state = EOL_BEGIN;
441: } else {
442: *(me->buffer+me->buflen++) = *b;
443: if (me->buflen >= MAX_GOPHER_LINE) {
444: if (PROT_TRACE)
2.56 eric 445: HTTrace("Gopher...... Line too long - ignored\n");
2.42 frystyk 446: me->buflen = 0;
447: me->junk = YES;
2.20 frystyk 448: }
449: }
2.42 frystyk 450: b++;
2.17 frystyk 451: }
2.42 frystyk 452: return HT_OK;
453: }
2.17 frystyk 454:
2.57 frystyk 455: PRIVATE int GopherMenu_put_string (HTStream * me, const char* s)
2.42 frystyk 456: {
457: return GopherMenu_put_block(me, s, (int) strlen(s));
1.1 timbl 458: }
2.11 timbl 459:
2.50 frystyk 460: PRIVATE int GopherMenu_put_character (HTStream * me, char c)
2.42 frystyk 461: {
462: return GopherMenu_put_block(me, &c, 1);
463: }
2.11 timbl 464:
2.50 frystyk 465: PRIVATE int GopherMenu_flush (HTStream * me)
2.42 frystyk 466: {
467: return (*me->target->isa->flush)(me->target);
468: }
469:
2.50 frystyk 470: PRIVATE int GopherMenu_free (HTStream * me)
2.42 frystyk 471: {
472: int status = HT_OK;
473: GopherBottom(me);
474: if ((status = (*me->target->isa->_free)(me->target)) == HT_WOULD_BLOCK)
475: return HT_WOULD_BLOCK;
2.55 frystyk 476: HT_FREE(me);
2.42 frystyk 477: return HT_OK;
478: }
479:
2.50 frystyk 480: PRIVATE int GopherMenu_abort (HTStream * me, HTList * e)
2.42 frystyk 481: {
482: (*me->target->isa->abort)(me->target, e);
2.55 frystyk 483: HT_FREE(me);
2.42 frystyk 484: if (PROT_TRACE)
2.56 eric 485: HTTrace("Gopher...... ABORTING...\n");
2.42 frystyk 486: return HT_ERROR;
487: }
488:
489: /* Goper Menu Stream
490: ** -----------------
2.20 frystyk 491: */
2.57 frystyk 492: PRIVATE const HTStreamClass GopherMenuClass =
2.42 frystyk 493: {
494: "GopherMenu",
495: GopherMenu_flush,
496: GopherMenu_free,
497: GopherMenu_abort,
498: GopherMenu_put_character,
499: GopherMenu_put_string,
500: GopherMenu_put_block
501: };
2.26 frystyk 502:
2.42 frystyk 503: /*
504: ** Stream for creating a HTML object out of a Gopher Menu object
505: */
506: PRIVATE HTStream * GopherMenu_new (HTRequest * request, char *url, BOOL CSO)
507: {
2.55 frystyk 508: HTStream * me;
509: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
510: HT_OUTOFMEM("GopherMenu_new");
2.42 frystyk 511: me->isa = &GopherMenuClass;
512: me->target = HTMLGenerator(request, NULL, WWW_HTML,
2.60 frystyk 513: HTRequest_outputFormat(request),
514: HTRequest_outputStream(request));
515: HTAnchor_setFormat(HTRequest_anchor(request), WWW_HTML);
2.42 frystyk 516: me->request = request;
517: me->state = EOL_BEGIN;
518: me->url = url;
519: me->CSO = CSO;
520: GopherTitle(me);
521: return me;
522: }
2.20 frystyk 523:
2.42 frystyk 524: /* ------------------------------------------------------------------------- */
525: /* GOPHER STATE MACHINE */
526: /* ------------------------------------------------------------------------- */
2.7 secret 527:
2.42 frystyk 528: /* GopherCleanup
529: ** -------------
530: ** This function closes the connection and frees memory.
531: ** Returns YES if OK, else NO
532: */
2.60 frystyk 533: PRIVATE BOOL GopherCleanup (HTRequest * request, int status)
2.42 frystyk 534: {
2.60 frystyk 535: HTNet * net = HTRequest_net(request);
536: gopher_info * gopher = (gopher_info *) HTNet_context(net);
537: HTStream * input = HTRequest_inputStream(request);
2.20 frystyk 538:
2.42 frystyk 539: /* Free stream with data TO network */
2.60 frystyk 540: if (input) {
2.42 frystyk 541: if (status == HT_INTERRUPTED)
2.60 frystyk 542: (*input->isa->abort)(input, NULL);
2.42 frystyk 543: else
2.60 frystyk 544: (*input->isa->_free)(input);
2.20 frystyk 545: }
546:
2.42 frystyk 547: /* Remove the request object and our own context structure for gopher */
548: HTNet_delete(net, status);
549: if (gopher) {
2.55 frystyk 550: HT_FREE(gopher->cmd);
551: HT_FREE(gopher);
2.34 frystyk 552: }
2.42 frystyk 553: return YES;
2.20 frystyk 554: }
2.7 secret 555:
1.1 timbl 556: /* Display a Gopher Index document
2.20 frystyk 557: ** -------------------------------
2.42 frystyk 558: ** We create a small HTML object as we have no network activity
2.20 frystyk 559: */
2.42 frystyk 560: PRIVATE void display_index (HTRequest * request)
1.1 timbl 561: {
2.60 frystyk 562: HTParentAnchor * anchor = HTRequest_anchor(request);
2.40 frystyk 563: HTStructured *target = HTMLGenerator(request, NULL, WWW_HTML,
2.60 frystyk 564: HTRequest_outputFormat(request),
565: HTRequest_outputStream(request));
566:
2.42 frystyk 567: /* Update anchor information */
2.60 frystyk 568: HTAnchor_setFormat(anchor, WWW_HTML);
569: HTAnchor_setTitle(anchor, "Searchable Gopher Index");
2.42 frystyk 570: /* @@@ We don't set Content-Length */
571:
2.34 frystyk 572: START(HTML_HTML);
573: START(HTML_HEAD);
574: START(HTML_TITLE);
575: PUTS("Searchable Gopher Index");
576: END(HTML_TITLE);
577: END(HTML_HEAD);
578: START(HTML_BODY);
579:
1.2 timbl 580: START(HTML_H1);
2.20 frystyk 581: PUTS("Searchable Gopher Index");
1.2 timbl 582: END(HTML_H1);
2.7 secret 583: START(HTML_ISINDEX);
2.34 frystyk 584: END(HTML_BODY);
585: END(HTML_HTML);
2.42 frystyk 586: (*target->isa->_free)(target);
2.7 secret 587: }
588:
589:
590: /* Display a CSO index document
591: ** -------------------------------
2.42 frystyk 592: ** We create a small HTML object as we have no network activity
2.7 secret 593: */
2.42 frystyk 594: PRIVATE void display_cso (HTRequest * request)
2.7 secret 595: {
2.60 frystyk 596: HTParentAnchor * anchor = HTRequest_anchor(request);
2.40 frystyk 597: HTStructured *target = HTMLGenerator(request, NULL, WWW_HTML,
2.60 frystyk 598: HTRequest_outputFormat(request),
599: HTRequest_outputStream(request));
600:
2.42 frystyk 601: /* Update anchor information */
2.60 frystyk 602: HTAnchor_setFormat(anchor, WWW_HTML);
603: HTAnchor_setTitle(anchor, "Searchable SCO Index");
2.42 frystyk 604: /* @@@ We don't set Content-Length */
605:
2.34 frystyk 606: START(HTML_HTML);
607: START(HTML_HEAD);
608: START(HTML_TITLE);
609: PUTS("Searchable Index of a CSO Name Server");
610: END(HTML_TITLE);
611: END(HTML_HEAD);
612: START(HTML_BODY);
613:
2.7 secret 614: START(HTML_H1);
2.20 frystyk 615: PUTS("Searchable Index of a CSO Name Server");
2.7 secret 616: END(HTML_H1);
2.34 frystyk 617: PUTS("A CSO Name Server usually provides directory information about people.");
2.7 secret 618: START(HTML_ISINDEX);
2.34 frystyk 619: END(HTML_BODY);
620: END(HTML_HTML);
2.42 frystyk 621: (*target->isa->_free)(target);
1.1 timbl 622: }
623:
2.42 frystyk 624: /* HTLoadGopher
625: ** ------------
2.24 frystyk 626: ** Given a hypertext address, this routine loads a gopher document
627: **
628: ** On entry,
2.42 frystyk 629: ** request This is the request structure
630: ** On Exit
631: ** returns HT_ERROR Error has occured in call back
632: ** HT_OK Call back was OK
1.1 timbl 633: */
2.42 frystyk 634: PUBLIC int HTLoadGopher (SOCKET soc, HTRequest * request, SockOps ops)
1.1 timbl 635: {
2.42 frystyk 636: int status = HT_ERROR;
2.60 frystyk 637: HTNet * net = HTRequest_net(request);
638: HTParentAnchor * anchor = HTRequest_anchor(request);
639: char * url = HTAnchor_physical(anchor);
640: gopher_info * gopher;
2.20 frystyk 641:
2.42 frystyk 642: /*
643: ** Initiate a new gopher structure and bind to request structure
644: ** This is actually state GOPHER_BEGIN, but it can't be in the state
645: ** machine as we need the structure first.
646: */
647: if (ops == FD_NONE) {
2.56 eric 648: if (PROT_TRACE) HTTrace("Gopher...... Looking for `%s\'\n",url);
2.55 frystyk 649: if ((gopher = (gopher_info *) HT_CALLOC(1, sizeof(gopher_info))) == NULL)
650: HT_OUTOFMEM("HTLoadGopher");
2.42 frystyk 651: gopher->type = GT_MENU;
652: gopher->state = GOPHER_BEGIN;
2.60 frystyk 653: HTNet_setContext(net, gopher);
2.44 frystyk 654: } else if (ops == FD_CLOSE) { /* Interrupted */
2.42 frystyk 655: GopherCleanup(request, HT_INTERRUPTED);
656: return HT_OK;
657: } else
2.60 frystyk 658: gopher = (gopher_info *) HTNet_context(net); /* Get existing copy */
2.42 frystyk 659:
660: /* Now jump into the machine. We know the state from the previous run */
661: while (1) {
662: switch (gopher->state) {
663:
664: case GOPHER_BEGIN: /* Get entity type, and selector string */
665: {
666: char *path = HTParse(url, "", PARSE_PATH);
667: char *selector = path;
668: char *query = NULL;
669: char *separator = NULL;
670: if (*selector) gopher->type = (HTGopherType) *selector++;
671: if (gopher->type == GT_INDEX) {
2.60 frystyk 672: HTAnchor_setIndex(anchor); /* Is index */
2.42 frystyk 673: query = strchr(selector, '?');
674:
675: /* Display local cover page only if no search requested */
676: if (!query || !*(query+1)) { /* No search required */
677: display_index(request);
678: gopher->state = GOPHER_GOT_DATA;
2.55 frystyk 679: HT_FREE(path);
2.42 frystyk 680: break;
681: } else {
682: *query++ = 0; /* Skip '?' */
683: separator = "\t";
684: }
685: } else if (gopher->type == GT_CSO) {
2.60 frystyk 686: HTAnchor_setIndex(anchor); /* Search is allowed */
2.42 frystyk 687: query = strchr(selector, '?'); /* Look for search string */
688:
689: /* Display local cover page only if no search requested */
690: if (!query || !*(query+1)) { /* No search required */
691: display_cso(request);
692: gopher->state = GOPHER_GOT_DATA;
2.55 frystyk 693: HT_FREE(path);
2.42 frystyk 694: break;
695: } else {
696: *query++ = 0; /* Skip '?' */
697: *selector = 0;
698: separator = "query ";
699: }
700: }
2.20 frystyk 701:
2.42 frystyk 702: /* Now generate the final command */
703: {
704: char crlf[3];
705: StrAllocCopy(gopher->cmd, selector);
706: if (query) {
707: char *p;
708: for (p=query; *p; p++) /* Remove plus signs 921006 */
709: if (*p == '+') *p = ' ';
710: StrAllocCat(gopher->cmd, separator);
711: StrAllocCat(gopher->cmd, query);
712: }
713: HTUnEscape(gopher->cmd);
714: HTCleanTelnetString(gopher->cmd); /* Prevent sec holes */
715: *crlf = CR; /* Telnet termination */
716: *(crlf+1) = LF;
717: *(crlf+2) = '0円';
718: StrAllocCat(gopher->cmd, crlf);
719: }
2.55 frystyk 720: HT_FREE(path);
2.42 frystyk 721: gopher->state = GOPHER_NEED_CONNECTION;
1.1 timbl 722: }
2.42 frystyk 723: break;
724:
725: case GOPHER_NEED_CONNECTION:
2.43 frystyk 726: status = HTDoConnect(net, url, GOPHER_PORT);
2.42 frystyk 727: if (status == HT_OK) {
2.59 frystyk 728: /*
729: ** Check the protocol class to see if we have connected to a
730: ** the right class of server, in this case HTTP.
731: */
732: {
733: HTHost * host = HTNet_host(net);
734: char * s_class = HTHost_class(host);
735: if (s_class && strcasecomp(s_class, "gopher")) {
736: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
737: NULL, 0, "HTLoadGopher");
738: gopher->state = GOPHER_ERROR;
739: break;
740: }
741: HTHost_setClass(host, "gopher");
742: }
2.42 frystyk 743:
2.59 frystyk 744: /*
745: ** Create the stream pipe FROM the channel to the application.
746: ** The target for the input stream pipe is set up using the
747: ** stream stack.
748: */
749: {
750: HTStream * target;
751: if (gopher->type == GT_MENU || gopher->type == GT_INDEX)
752: target = GopherMenu_new(request, url, NO);
753: else if (gopher->type == GT_CSO)
754: target = GopherMenu_new(request, url, YES);
755: else
756: target = HTStreamStack(WWW_UNKNOWN,
2.60 frystyk 757: HTRequest_outputFormat(request),
758: HTRequest_outputStream(request),
2.59 frystyk 759: request, NO);
760: HTNet_getInput(net, target, NULL, 0);
2.62 ! frystyk 761: HTRequest_setOutputConnected(request, YES);
2.59 frystyk 762: }
2.42 frystyk 763:
2.59 frystyk 764: /*
765: ** Create the stream pipe TO the channel from the application
766: ** and hook it up to the request object
767: */
768: {
769: HTOutputStream * output = HTNet_getOutput(net, NULL, 0);
770: HTRequest_setInputStream(request, (HTStream *) output);
771: }
2.42 frystyk 772: gopher->state = GOPHER_NEED_REQUEST;
2.59 frystyk 773:
2.42 frystyk 774: } else if (status == HT_WOULD_BLOCK)
775: return HT_OK;
776: else
777: gopher->state = GOPHER_ERROR;
778: break;
779:
780: case GOPHER_NEED_REQUEST:
2.56 eric 781: if (PROT_TRACE) HTTrace("Gopher Tx... `%s\'", gopher->cmd);
2.60 frystyk 782: {
783: HTStream * input = HTRequest_inputStream(request);
784: status = (*input->isa->put_block)
785: (input, gopher->cmd, strlen(gopher->cmd));
786: if (status == HT_WOULD_BLOCK)
787: return HT_OK;
788: else if (status == HT_ERROR)
789: gopher->state = GOPHER_ERROR;
790: else
791: gopher->state = GOPHER_NEED_RESPONSE;
792: }
2.42 frystyk 793: break;
1.1 timbl 794:
2.42 frystyk 795: case GOPHER_NEED_RESPONSE:
2.59 frystyk 796: status = (*net->input->isa->read)(net->input);
2.42 frystyk 797: if (status == HT_WOULD_BLOCK)
798: return HT_OK;
2.53 frystyk 799: else if (status == HT_LOADED || status == HT_CLOSED)
2.42 frystyk 800: gopher->state = GOPHER_GOT_DATA;
801: else
802: gopher->state = GOPHER_ERROR;
803: break;
1.2 timbl 804:
2.42 frystyk 805: case GOPHER_GOT_DATA:
806: GopherCleanup(request, HT_LOADED);
807: return HT_OK;
808: break;
809:
810: case GOPHER_NO_DATA:
811: GopherCleanup(request, HT_NO_DATA);
812: return HT_OK;
813: break;
814:
815: case GOPHER_ERROR:
816: GopherCleanup(request, HT_ERROR);
817: return HT_OK;
818: break;
2.25 frystyk 819: }
2.42 frystyk 820: } /* while(1) */
1.1 timbl 821: }
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