Annotation of libwww/Library/src/HTGopher.c, revision 2.59
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"
2.20 frystyk 26: #include "HTTCP.h"
2.42 frystyk 27: #include "HTReqMan.h"
2.43 frystyk 28: #include "HTNetMan.h"
2.20 frystyk 29: #include "HTGopher.h" /* Implemented here */
30:
31: /* Macros and other defines */
32: #ifndef GOPHER_PORT
33: #define GOPHER_PORT 70 /* See protocol spec */
34: #endif
1.2 timbl 35:
2.20 frystyk 36: /* Hypertext object building machinery */
2.17 frystyk 37: #define PUTC(c) (*target->isa->put_character)(target, c)
38: #define PUTS(s) (*target->isa->put_string)(target, s)
39: #define START(e) (*target->isa->start_element)(target, e, 0, 0)
40: #define END(e) (*target->isa->end_element)(target, e)
2.20 frystyk 41:
42: /* Type definitions and global variables etc. local to this module */
43: typedef enum _HTGopherType {
2.42 frystyk 44: GT_TEXT = '0',
45: GT_MENU = '1',
46: GT_CSO = '2',
47: GT_ERROR = '3',
48: GT_MACBINHEX = '4',
49: GT_PCBINHEX = '5',
50: GT_UUENCODED = '6',
51: GT_INDEX = '7',
52: GT_TELNET = '8',
53: GT_BINARY = '9',
54: GT_GIF = 'g',
55: GT_HTML = 'h', /* HTML */
56: GT_INFO = 'i',
57: GT_SOUND = 's',
58: GT_WWW = 'w', /* W3 address */
59: GT_IMAGE = 'I',
60: GT_TN3270 = 'T',
61: GT_DUPLICATE = '+',
62: GT_PLUS_IMAGE = ':', /* Addition from Gopher Plus */
63: GT_PLUS_MOVIE = ';',
64: GT_PLUS_SOUND = '<',
65: GT_EOF = '.'
2.20 frystyk 66: } HTGopherType;
67:
2.42 frystyk 68: /* Final states have negative value */
69: typedef enum _GopherState {
70: GOPHER_ERROR = -3,
71: GOPHER_NO_DATA = -2,
72: GOPHER_GOT_DATA = -1,
73: GOPHER_BEGIN = 0,
74: GOPHER_NEED_CONNECTION,
75: GOPHER_NEED_REQUEST,
76: GOPHER_NEED_RESPONSE
77: } GopherState;
1.2 timbl 78:
2.42 frystyk 79: /* This is the context structure for the this module */
2.20 frystyk 80: typedef struct _gopher_info {
2.30 frystyk 81: HTGopherType type; /* Gopher item type */
2.42 frystyk 82: GopherState state;
83: char * cmd;
2.20 frystyk 84: } gopher_info;
1.1 timbl 85:
2.42 frystyk 86: #define MAX_GOPHER_LINE 256
87:
88: struct _HTStructured {
2.57 frystyk 89: const HTStructuredClass * isa;
2.42 frystyk 90: };
91:
92: struct _HTStream {
2.57 frystyk 93: const HTStreamClass * isa;
2.42 frystyk 94: HTStructured * target;
95: HTRequest * request;
2.58 frystyk 96: HTEOLState state;
2.42 frystyk 97: char * url;
98: BOOL pre; /* Preformatted mode? */
99: BOOL junk; /* For too long lines */
100: BOOL CSO;
101: char cso_rec[10]; /* CSO record number */
102: char buffer[MAX_GOPHER_LINE+1];
103: int buflen;
104: };
105:
2.59 ! frystyk 106: struct _HTInputStream {
! 107: const HTInputStreamClass * isa;
! 108: };
! 109:
2.45 frystyk 110: PRIVATE HTDirShow dir_show = HT_DS_ICON;
111:
2.20 frystyk 112: /* ------------------------------------------------------------------------- */
1.1 timbl 113:
2.42 frystyk 114: /* GopherIcon
115: ** ----------
2.20 frystyk 116: ** This function finds an appopriate icon for the item in the gopher
117: ** list. Actually it is only a shell build upon HTGetIcon().
2.17 frystyk 118: */
2.42 frystyk 119: PRIVATE HTIconNode *GopherIcon (HTGopherType type)
2.17 frystyk 120: {
2.36 frystyk 121: HTFormat content_type = NULL;
122: HTEncoding content_encoding = NULL;
2.45 frystyk 123: HTFileMode mode = HT_IS_FILE;
2.42 frystyk 124: switch(type) {
2.45 frystyk 125: case GT_MENU:
126: mode = HT_IS_DIR;
2.42 frystyk 127: case GT_TEXT:
2.17 frystyk 128: content_type = HTAtom_for("text/void");
129: break;
2.42 frystyk 130: case GT_IMAGE:
131: case GT_PLUS_IMAGE:
132: case GT_GIF:
2.17 frystyk 133: content_type = HTAtom_for("image/void");
134: break;
2.42 frystyk 135: case GT_WWW:
136: case GT_HTML:
2.17 frystyk 137: content_type = HTAtom_for("text/void");
138: break;
2.42 frystyk 139: case GT_SOUND:
140: case GT_PLUS_SOUND:
2.17 frystyk 141: content_type = HTAtom_for("audio/void");
142: break;
2.42 frystyk 143: case GT_PLUS_MOVIE:
2.20 frystyk 144: content_type = HTAtom_for("video/void");
2.17 frystyk 145: break;
2.42 frystyk 146: case GT_INDEX:
2.17 frystyk 147: content_type = HTAtom_for("application/x-gopher-index");
148: break;
2.42 frystyk 149: case GT_CSO:
2.17 frystyk 150: content_type = HTAtom_for("application/x-gopher-cso");
151: break;
2.42 frystyk 152: case GT_TELNET:
2.17 frystyk 153: content_type = HTAtom_for("application/x-gopher-telnet");
154: break;
2.42 frystyk 155: case GT_TN3270:
2.17 frystyk 156: content_type = HTAtom_for("application/x-gopher-tn3270");
157: break;
2.42 frystyk 158: case GT_DUPLICATE:
2.17 frystyk 159: content_type = HTAtom_for("application/x-gopher-duplicate");
160: break;
2.42 frystyk 161: case GT_ERROR:
2.17 frystyk 162: content_type = HTAtom_for("www/unknown");
163: break;
2.42 frystyk 164: case GT_BINARY:
2.36 frystyk 165: content_type = WWW_BINARY;
166: break;
2.17 frystyk 167: default:
168: content_type = HTAtom_for("www/unknown");
169: break;
170: }
2.45 frystyk 171: return HTGetIcon(mode, content_type, content_encoding);
2.17 frystyk 172: }
173:
2.42 frystyk 174: /* ------------------------------------------------------------------------- */
175: /* STREAMS */
176: /* ------------------------------------------------------------------------- */
2.17 frystyk 177:
2.42 frystyk 178: /* GopherTitle
179: ** -----------
180: ** Create the top part of the page
1.1 timbl 181: */
2.42 frystyk 182: PRIVATE BOOL GopherTitle (HTStream *me)
183: {
184: HTStructured *target = me->target;
185: char *str = NULL;
186: StrAllocCopy(str, me->CSO ? "CSO Search " : "GopherMenu");
2.28 frystyk 187:
2.42 frystyk 188: START(HTML_HTML);
189: START(HTML_HEAD);
190: START(HTML_TITLE);
191: if (me->CSO) {
192: char *keyword = strchr(me->url, '?');
193: if (keyword) {
194: StrAllocCat(str, "for ");
195: StrAllocCat(str, ++keyword);
196: }
197: }
198: PUTS(str);
199: END(HTML_TITLE);
200: END(HTML_HEAD);
2.26 frystyk 201:
2.42 frystyk 202: START(HTML_BODY);
203: START(HTML_H1);
204: PUTS(str);
205: END(HTML_H1);
2.55 frystyk 206: HT_FREE(str);
2.42 frystyk 207: return YES;
208: }
1.1 timbl 209:
2.42 frystyk 210: /* GopherBottom
211: ** ------------
212: ** Create the bottom part of the page
213: */
214: PRIVATE BOOL GopherBottom (HTStream *me)
215: {
216: HTStructured *target = me->target;
217: if (me->pre)
218: END(HTML_PRE);
219: END(HTML_BODY);
220: END(HTML_HTML);
221: return YES;
222: }
2.17 frystyk 223:
2.42 frystyk 224: /* GopherMenuLine
225: ** --------------
226: ** Parses a Gopher Menu Line
227: ** Return YES if more data else NO
228: */
229: PRIVATE BOOL GopherMenuLine (HTStream *me, char *line)
230: {
231: HTStructured *target = me->target;
232: HTGopherType gtype = (HTGopherType) *line++;
233: if (PROT_TRACE)
2.56 eric 234: HTTrace("HTGopher.... Menu line: `%s\'\n", line);
2.42 frystyk 235: if (gtype == GT_INFO) {
236: char *stop = strchr(line, '\t');
237: if (stop) *stop = '\0';
238: PUTS(line);
239: } else if (gtype == GT_ERROR) {
240: char *stop = strchr(line, '\t');
241: if (stop) *stop = '\0';
242: PUTS(line);
243: } else if ((strstr(line, "error.host") || strstr(line, "errorhost"))) {
244: char *stop = strchr(line, '\t'); /* Chop off error.host */
245: if (stop) *stop = '\0';
246: PUTS(line);
247: } else if (gtype == GT_EOF) {
248: return NO;
249: } else { /* Parse normal gopher menu line */
250: char *name = line; /* Get link information */
251: char *selector = strchr(name, '\t');
252: char *host = NULL;
253: char *port = NULL;
254: if (selector) {
255: *selector++ = '\0';
256: if ((host = strchr(selector, '\t'))) {
257: *host++ = '\0';
258: if ((port = strchr(host, '\t'))) {
259: char *junk;
260: *port = ':'; /* delimit host a la W3 */
261: if ((junk = strchr(port, '\t')) != NULL)
262: *junk = '\0'; /* Chop port */
263: if (*(port+1) == '0' && !*(port+2))
264: *port = '\0';
2.21 frystyk 265: }
2.42 frystyk 266: }
267: }
268: if (!me->pre) { /* For now we use preformatted listing */
269: START(HTML_PRE);
270: me->pre = YES;
271: }
2.45 frystyk 272: if (dir_show & HT_DS_ICON) { /* Put out the icon */
2.42 frystyk 273: HTIconNode *icon = GopherIcon(gtype);
2.52 frystyk 274: if (icon) {
2.42 frystyk 275: HTMLPutImg(target, icon->icon_url,
276: HTIcon_alt_string(icon->icon_alt, YES), NULL);
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';
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';
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';
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';
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';
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,
513: request->output_format, request->output_stream);
514: HTAnchor_setFormat(request->anchor, WWW_HTML);
515: me->request = request;
516: me->state = EOL_BEGIN;
517: me->url = url;
518: me->CSO = CSO;
519: GopherTitle(me);
520: return me;
521: }
2.20 frystyk 522:
2.42 frystyk 523: /* ------------------------------------------------------------------------- */
524: /* GOPHER STATE MACHINE */
525: /* ------------------------------------------------------------------------- */
2.7 secret 526:
2.42 frystyk 527: /* GopherCleanup
528: ** -------------
529: ** This function closes the connection and frees memory.
530: ** Returns YES if OK, else NO
531: */
532: PRIVATE BOOL GopherCleanup (HTRequest *req, int status)
533: {
534: HTNet *net = req->net;
535: gopher_info *gopher = (gopher_info *) net->context;
2.20 frystyk 536:
2.42 frystyk 537: /* Free stream with data TO network */
538: if (req->input_stream) {
539: if (status == HT_INTERRUPTED)
540: (*req->input_stream->isa->abort)(req->input_stream, NULL);
541: else
542: (*req->input_stream->isa->_free)(req->input_stream);
2.20 frystyk 543: }
544:
2.42 frystyk 545: /* Remove the request object and our own context structure for gopher */
546: HTNet_delete(net, status);
547: if (gopher) {
2.55 frystyk 548: HT_FREE(gopher->cmd);
549: HT_FREE(gopher);
2.34 frystyk 550: }
2.42 frystyk 551: return YES;
2.20 frystyk 552: }
2.7 secret 553:
1.1 timbl 554: /* Display a Gopher Index document
2.20 frystyk 555: ** -------------------------------
2.42 frystyk 556: ** We create a small HTML object as we have no network activity
2.20 frystyk 557: */
2.42 frystyk 558: PRIVATE void display_index (HTRequest * request)
1.1 timbl 559: {
2.40 frystyk 560: HTStructured *target = HTMLGenerator(request, NULL, WWW_HTML,
2.42 frystyk 561: request->output_format,
562: request->output_stream);
563: /* Update anchor information */
2.36 frystyk 564: HTAnchor_setFormat(request->anchor, WWW_HTML);
2.42 frystyk 565: HTAnchor_setTitle(request->anchor, "Searchable Gopher Index");
566: /* @@@ We don't set Content-Length */
567:
2.34 frystyk 568: START(HTML_HTML);
569: START(HTML_HEAD);
570: START(HTML_TITLE);
571: PUTS("Searchable Gopher Index");
572: END(HTML_TITLE);
573: END(HTML_HEAD);
574: START(HTML_BODY);
575:
1.2 timbl 576: START(HTML_H1);
2.20 frystyk 577: PUTS("Searchable Gopher Index");
1.2 timbl 578: END(HTML_H1);
2.7 secret 579: START(HTML_ISINDEX);
2.34 frystyk 580: END(HTML_BODY);
581: END(HTML_HTML);
2.42 frystyk 582: (*target->isa->_free)(target);
2.7 secret 583: }
584:
585:
586: /* Display a CSO index document
587: ** -------------------------------
2.42 frystyk 588: ** We create a small HTML object as we have no network activity
2.7 secret 589: */
2.42 frystyk 590: PRIVATE void display_cso (HTRequest * request)
2.7 secret 591: {
2.40 frystyk 592: HTStructured *target = HTMLGenerator(request, NULL, WWW_HTML,
2.42 frystyk 593: request->output_format,
594: request->output_stream);
595: /* Update anchor information */
2.36 frystyk 596: HTAnchor_setFormat(request->anchor, WWW_HTML);
2.42 frystyk 597: HTAnchor_setTitle(request->anchor, "Searchable SCO Index");
598: /* @@@ We don't set Content-Length */
599:
2.34 frystyk 600: START(HTML_HTML);
601: START(HTML_HEAD);
602: START(HTML_TITLE);
603: PUTS("Searchable Index of a CSO Name Server");
604: END(HTML_TITLE);
605: END(HTML_HEAD);
606: START(HTML_BODY);
607:
2.7 secret 608: START(HTML_H1);
2.20 frystyk 609: PUTS("Searchable Index of a CSO Name Server");
2.7 secret 610: END(HTML_H1);
2.34 frystyk 611: PUTS("A CSO Name Server usually provides directory information about people.");
2.7 secret 612: START(HTML_ISINDEX);
2.34 frystyk 613: END(HTML_BODY);
614: END(HTML_HTML);
2.42 frystyk 615: (*target->isa->_free)(target);
1.1 timbl 616: }
617:
2.42 frystyk 618: /* HTLoadGopher
619: ** ------------
2.24 frystyk 620: ** Given a hypertext address, this routine loads a gopher document
621: **
622: ** On entry,
2.42 frystyk 623: ** request This is the request structure
624: ** On Exit
625: ** returns HT_ERROR Error has occured in call back
626: ** HT_OK Call back was OK
1.1 timbl 627: */
2.42 frystyk 628: PUBLIC int HTLoadGopher (SOCKET soc, HTRequest * request, SockOps ops)
1.1 timbl 629: {
2.42 frystyk 630: int status = HT_ERROR;
631: HTNet *net = request->net;
2.20 frystyk 632: gopher_info *gopher;
2.42 frystyk 633: char *url = HTAnchor_physical(request->anchor);
2.20 frystyk 634:
2.42 frystyk 635: /*
636: ** Initiate a new gopher structure and bind to request structure
637: ** This is actually state GOPHER_BEGIN, but it can't be in the state
638: ** machine as we need the structure first.
639: */
640: if (ops == FD_NONE) {
2.56 eric 641: if (PROT_TRACE) HTTrace("Gopher...... Looking for `%s\'\n",url);
2.55 frystyk 642: if ((gopher = (gopher_info *) HT_CALLOC(1, sizeof(gopher_info))) == NULL)
643: HT_OUTOFMEM("HTLoadGopher");
2.42 frystyk 644: gopher->type = GT_MENU;
645: gopher->state = GOPHER_BEGIN;
646: net->context = gopher;
2.44 frystyk 647: } else if (ops == FD_CLOSE) { /* Interrupted */
2.42 frystyk 648: GopherCleanup(request, HT_INTERRUPTED);
649: return HT_OK;
650: } else
651: gopher = (gopher_info *) net->context; /* Get existing copy */
652:
653: /* Now jump into the machine. We know the state from the previous run */
654: while (1) {
655: switch (gopher->state) {
656:
657: case GOPHER_BEGIN: /* Get entity type, and selector string */
658: {
659: char *path = HTParse(url, "", PARSE_PATH);
660: char *selector = path;
661: char *query = NULL;
662: char *separator = NULL;
663: if (*selector) gopher->type = (HTGopherType) *selector++;
664: if (gopher->type == GT_INDEX) {
665: HTAnchor_setIndex(request->anchor); /* Is index */
666: query = strchr(selector, '?');
667:
668: /* Display local cover page only if no search requested */
669: if (!query || !*(query+1)) { /* No search required */
670: display_index(request);
671: gopher->state = GOPHER_GOT_DATA;
2.55 frystyk 672: HT_FREE(path);
2.42 frystyk 673: break;
674: } else {
675: *query++ = 0; /* Skip '?' */
676: separator = "\t";
677: }
678: } else if (gopher->type == GT_CSO) {
679: HTAnchor_setIndex(request->anchor); /* Search is allowed */
680: query = strchr(selector, '?'); /* Look for search string */
681:
682: /* Display local cover page only if no search requested */
683: if (!query || !*(query+1)) { /* No search required */
684: display_cso(request);
685: gopher->state = GOPHER_GOT_DATA;
2.55 frystyk 686: HT_FREE(path);
2.42 frystyk 687: break;
688: } else {
689: *query++ = 0; /* Skip '?' */
690: *selector = 0;
691: separator = "query ";
692: }
693: }
2.20 frystyk 694:
2.42 frystyk 695: /* Now generate the final command */
696: {
697: char crlf[3];
698: StrAllocCopy(gopher->cmd, selector);
699: if (query) {
700: char *p;
701: for (p=query; *p; p++) /* Remove plus signs 921006 */
702: if (*p == '+') *p = ' ';
703: StrAllocCat(gopher->cmd, separator);
704: StrAllocCat(gopher->cmd, query);
705: }
706: HTUnEscape(gopher->cmd);
707: HTCleanTelnetString(gopher->cmd); /* Prevent sec holes */
708: *crlf = CR; /* Telnet termination */
709: *(crlf+1) = LF;
710: *(crlf+2) = '\0';
711: StrAllocCat(gopher->cmd, crlf);
712: }
2.55 frystyk 713: HT_FREE(path);
2.42 frystyk 714: gopher->state = GOPHER_NEED_CONNECTION;
1.1 timbl 715: }
2.42 frystyk 716: break;
717:
718: case GOPHER_NEED_CONNECTION:
2.43 frystyk 719: status = HTDoConnect(net, url, GOPHER_PORT);
2.42 frystyk 720: if (status == HT_OK) {
2.59 ! frystyk 721: /*
! 722: ** Check the protocol class to see if we have connected to a
! 723: ** the right class of server, in this case HTTP.
! 724: */
! 725: {
! 726: HTHost * host = HTNet_host(net);
! 727: char * s_class = HTHost_class(host);
! 728: if (s_class && strcasecomp(s_class, "gopher")) {
! 729: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
! 730: NULL, 0, "HTLoadGopher");
! 731: gopher->state = GOPHER_ERROR;
! 732: break;
! 733: }
! 734: HTHost_setClass(host, "gopher");
! 735: }
2.42 frystyk 736:
2.59 ! frystyk 737: /*
! 738: ** Create the stream pipe FROM the channel to the application.
! 739: ** The target for the input stream pipe is set up using the
! 740: ** stream stack.
! 741: */
! 742: {
! 743: HTStream * target;
! 744: if (gopher->type == GT_MENU || gopher->type == GT_INDEX)
! 745: target = GopherMenu_new(request, url, NO);
! 746: else if (gopher->type == GT_CSO)
! 747: target = GopherMenu_new(request, url, YES);
! 748: else
! 749: target = HTStreamStack(WWW_UNKNOWN,
! 750: request->output_format,
! 751: request->output_stream,
! 752: request, NO);
! 753: HTNet_getInput(net, target, NULL, 0);
! 754: }
2.42 frystyk 755:
2.59 ! frystyk 756: /*
! 757: ** Create the stream pipe TO the channel from the application
! 758: ** and hook it up to the request object
! 759: */
! 760: {
! 761: HTOutputStream * output = HTNet_getOutput(net, NULL, 0);
! 762: HTRequest_setInputStream(request, (HTStream *) output);
! 763: }
2.42 frystyk 764: gopher->state = GOPHER_NEED_REQUEST;
2.59 ! frystyk 765:
2.42 frystyk 766: } else if (status == HT_WOULD_BLOCK)
767: return HT_OK;
768: else
769: gopher->state = GOPHER_ERROR;
770: break;
771:
772: case GOPHER_NEED_REQUEST:
2.56 eric 773: if (PROT_TRACE) HTTrace("Gopher Tx... `%s\'", gopher->cmd);
2.42 frystyk 774: status = (*request->input_stream->isa->put_block)
775: (request->input_stream, gopher->cmd, strlen(gopher->cmd));
776: if (status == HT_WOULD_BLOCK)
777: return HT_OK;
778: else if (status == HT_ERROR)
779: gopher->state = GOPHER_ERROR;
780: else
781: gopher->state = GOPHER_NEED_RESPONSE;
782: break;
1.1 timbl 783:
2.42 frystyk 784: case GOPHER_NEED_RESPONSE:
2.59 ! frystyk 785: status = (*net->input->isa->read)(net->input);
2.42 frystyk 786: if (status == HT_WOULD_BLOCK)
787: return HT_OK;
2.53 frystyk 788: else if (status == HT_LOADED || status == HT_CLOSED)
2.42 frystyk 789: gopher->state = GOPHER_GOT_DATA;
790: else
791: gopher->state = GOPHER_ERROR;
792: break;
1.2 timbl 793:
2.42 frystyk 794: case GOPHER_GOT_DATA:
795: GopherCleanup(request, HT_LOADED);
796: return HT_OK;
797: break;
798:
799: case GOPHER_NO_DATA:
800: GopherCleanup(request, HT_NO_DATA);
801: return HT_OK;
802: break;
803:
804: case GOPHER_ERROR:
805: GopherCleanup(request, HT_ERROR);
806: return HT_OK;
807: break;
2.25 frystyk 808: }
2.42 frystyk 809: } /* while(1) */
1.1 timbl 810: }
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