Annotation of libwww/Library/src/HTGopher.c, revision 2.68
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 */
2.64 frystyk 21: #include "wwwsys.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;
2.63 frystyk 83: HTNet * net;
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
2.61 frystyk 117: ** list. Actually it is only a shell build upon HTIcon_find().
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: }
2.61 frystyk 171: return HTIcon_find(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++;
2.66 frystyk 233: HTTRACE(PROT_TRACE, "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 */
2.66 frystyk 327: HTTRACE(PROT_TRACE, "HTGopher.... Bad menu item, `%s\'\n" _ line);
2.42 frystyk 328: }
329: }
330: return YES;
331: }
2.21 frystyk 332:
2.42 frystyk 333: /* GopherCSOLine
334: ** --------------
335: ** Parses a Gopher Menu Line
336: ** Return YES if more data else NO
337: */
338: PRIVATE BOOL GopherCSOLine (HTStream *me, char *line)
339: {
340: HTStructured *target = me->target;
341: if (*line == '1') { /* Information line */
342: char *start = strchr(line, ':');
2.67 frystyk 343: if (start) start++; else start=line;
2.42 frystyk 344: PUTS(start);
345: } else if (*line == '2') { /* Transfer complete */
346: return NO;
347: } else if (*line == '5') { /* Error */
348: char *start = strchr(line, ':');
2.67 frystyk 349: if (start) start++; else start=line;
2.42 frystyk 350: PUTS(start);
351: } else if (*line == '-') { /* data */
352: /* data lines look like '-200:code:field:value'
353: * where code is the search result number and can be
354: * multiple digits (infinte?)
355: * find the second colon and check the digit to the
356: * left of it to see if they are diferent
357: * if they are then a different person is starting.
358: */
359: char *code;
360: char *field;
361: if ((code = strchr(line, ':')) && (field = strchr(++code, ':'))) {
362: BOOL newrec = YES;
363: *field++ = '0円';
364: if (!*me->cso_rec) { /* Header of first record */
365: START(HTML_DL);
366: } else if (strcmp(me->cso_rec, code)) { /* Another new record */
367: START(HTML_B);
368: } else
369: newrec = NO;
370: START(HTML_DT);
371:
372: /* I'm not sure whether the name field comes in any
373: * special order or if its even required in a
374: * record, so for now the first line is the header
375: * no matter what it is (it's almost always the
376: * alias)
377: */
378: {
379: char *value = strchr(field, ':');
380: if (!value)
381: value = "Empty value";
382: else
383: *value++ = '0円';
384: {
385: char *strip = HTStrip(field);
386: PUTS(strip);
387: START(HTML_DD);
388: strip = HTStrip(value);
389: if (newrec) {
390: PUTS(strip);
391: END(HTML_B);
2.20 frystyk 392: } else
2.42 frystyk 393: PUTS(strip);
394: }
2.20 frystyk 395:
2.42 frystyk 396: /* Save the code for comparison on the next pass */
397: strcpy(me->cso_rec, code);
2.20 frystyk 398: }
2.42 frystyk 399: }
400: } else { /* Unknown line */
401: char *start = strchr(line, ':');
2.67 frystyk 402: if (start) start++; else start=line;
2.42 frystyk 403: PUTS(start);
2.20 frystyk 404: }
2.42 frystyk 405: return YES;
406: }
1.2 timbl 407:
2.42 frystyk 408: /*
409: ** Searches for Gopher line until buffer fills up or a CRLF or LF is found
410: */
2.57 frystyk 411: PRIVATE int GopherMenu_put_block (HTStream * me, const char * b, int l)
2.42 frystyk 412: {
413: while (l-- > 0) {
414: if (me->state == EOL_FCR) {
415: if (*b == LF && me->buflen) {
416: if (!me->junk) {
417: BOOL cont;
418: *(me->buffer+me->buflen) = '0円';
419: cont = me->CSO ? GopherCSOLine(me, me->buffer) :
420: GopherMenuLine(me, me->buffer);
421: if (cont == NO) return HT_LOADED;
422: } else
423: me->junk = NO; /* back to normal */
2.20 frystyk 424: }
2.45 frystyk 425: me->buflen = 0;
426: me->state = EOL_BEGIN;
2.42 frystyk 427: } else if (*b == CR) {
428: me->state = EOL_FCR;
429: } else if (*b == LF && me->buflen) {
430: if (!me->junk) {
431: BOOL cont;
432: *(me->buffer+me->buflen) = '0円';
433: cont = me->CSO ? GopherCSOLine(me, me->buffer) :
434: GopherMenuLine(me, me->buffer);
435: if (cont == NO) return HT_LOADED;
436: } else
437: me->junk = NO; /* back to normal */
438: me->buflen = 0;
439: me->state = EOL_BEGIN;
440: } else {
441: *(me->buffer+me->buflen++) = *b;
442: if (me->buflen >= MAX_GOPHER_LINE) {
2.66 frystyk 443: HTTRACE(PROT_TRACE, "Gopher...... Line too long - ignored\n");
2.42 frystyk 444: me->buflen = 0;
445: me->junk = YES;
2.20 frystyk 446: }
447: }
2.42 frystyk 448: b++;
2.17 frystyk 449: }
2.42 frystyk 450: return HT_OK;
451: }
2.17 frystyk 452:
2.57 frystyk 453: PRIVATE int GopherMenu_put_string (HTStream * me, const char* s)
2.42 frystyk 454: {
455: return GopherMenu_put_block(me, s, (int) strlen(s));
1.1 timbl 456: }
2.11 timbl 457:
2.50 frystyk 458: PRIVATE int GopherMenu_put_character (HTStream * me, char c)
2.42 frystyk 459: {
460: return GopherMenu_put_block(me, &c, 1);
461: }
2.11 timbl 462:
2.50 frystyk 463: PRIVATE int GopherMenu_flush (HTStream * me)
2.42 frystyk 464: {
465: return (*me->target->isa->flush)(me->target);
466: }
467:
2.50 frystyk 468: PRIVATE int GopherMenu_free (HTStream * me)
2.42 frystyk 469: {
470: int status = HT_OK;
471: GopherBottom(me);
472: if ((status = (*me->target->isa->_free)(me->target)) == HT_WOULD_BLOCK)
473: return HT_WOULD_BLOCK;
2.55 frystyk 474: HT_FREE(me);
2.42 frystyk 475: return HT_OK;
476: }
477:
2.50 frystyk 478: PRIVATE int GopherMenu_abort (HTStream * me, HTList * e)
2.42 frystyk 479: {
480: (*me->target->isa->abort)(me->target, e);
2.55 frystyk 481: HT_FREE(me);
2.66 frystyk 482: HTTRACE(PROT_TRACE, "Gopher...... ABORTING...\n");
2.42 frystyk 483: return HT_ERROR;
484: }
485:
486: /* Goper Menu Stream
487: ** -----------------
2.20 frystyk 488: */
2.57 frystyk 489: PRIVATE const HTStreamClass GopherMenuClass =
2.42 frystyk 490: {
491: "GopherMenu",
492: GopherMenu_flush,
493: GopherMenu_free,
494: GopherMenu_abort,
495: GopherMenu_put_character,
496: GopherMenu_put_string,
497: GopherMenu_put_block
498: };
2.26 frystyk 499:
2.42 frystyk 500: /*
501: ** Stream for creating a HTML object out of a Gopher Menu object
502: */
503: PRIVATE HTStream * GopherMenu_new (HTRequest * request, char *url, BOOL CSO)
504: {
2.55 frystyk 505: HTStream * me;
506: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
507: HT_OUTOFMEM("GopherMenu_new");
2.42 frystyk 508: me->isa = &GopherMenuClass;
509: me->target = HTMLGenerator(request, NULL, WWW_HTML,
2.60 frystyk 510: HTRequest_outputFormat(request),
511: HTRequest_outputStream(request));
512: HTAnchor_setFormat(HTRequest_anchor(request), WWW_HTML);
2.42 frystyk 513: me->request = request;
514: me->state = EOL_BEGIN;
515: me->url = url;
516: me->CSO = CSO;
517: GopherTitle(me);
518: return me;
519: }
2.20 frystyk 520:
2.42 frystyk 521: /* ------------------------------------------------------------------------- */
522: /* GOPHER STATE MACHINE */
523: /* ------------------------------------------------------------------------- */
2.7 secret 524:
2.42 frystyk 525: /* GopherCleanup
526: ** -------------
527: ** This function closes the connection and frees memory.
528: ** Returns YES if OK, else NO
529: */
2.60 frystyk 530: PRIVATE BOOL GopherCleanup (HTRequest * request, int status)
2.42 frystyk 531: {
2.60 frystyk 532: HTNet * net = HTRequest_net(request);
533: gopher_info * gopher = (gopher_info *) HTNet_context(net);
534: HTStream * input = HTRequest_inputStream(request);
2.20 frystyk 535:
2.42 frystyk 536: /* Free stream with data TO network */
2.60 frystyk 537: if (input) {
2.42 frystyk 538: if (status == HT_INTERRUPTED)
2.60 frystyk 539: (*input->isa->abort)(input, NULL);
2.42 frystyk 540: else
2.60 frystyk 541: (*input->isa->_free)(input);
2.20 frystyk 542: }
543:
2.42 frystyk 544: /* Remove the request object and our own context structure for gopher */
545: HTNet_delete(net, status);
546: if (gopher) {
2.55 frystyk 547: HT_FREE(gopher->cmd);
548: HT_FREE(gopher);
2.34 frystyk 549: }
2.42 frystyk 550: return YES;
2.20 frystyk 551: }
2.7 secret 552:
1.1 timbl 553: /* Display a Gopher Index document
2.20 frystyk 554: ** -------------------------------
2.42 frystyk 555: ** We create a small HTML object as we have no network activity
2.20 frystyk 556: */
2.42 frystyk 557: PRIVATE void display_index (HTRequest * request)
1.1 timbl 558: {
2.60 frystyk 559: HTParentAnchor * anchor = HTRequest_anchor(request);
2.40 frystyk 560: HTStructured *target = HTMLGenerator(request, NULL, WWW_HTML,
2.60 frystyk 561: HTRequest_outputFormat(request),
562: HTRequest_outputStream(request));
563:
2.42 frystyk 564: /* Update anchor information */
2.60 frystyk 565: HTAnchor_setFormat(anchor, WWW_HTML);
566: HTAnchor_setTitle(anchor, "Searchable Gopher Index");
2.42 frystyk 567: /* @@@ We don't set Content-Length */
568:
2.34 frystyk 569: START(HTML_HTML);
570: START(HTML_HEAD);
571: START(HTML_TITLE);
572: PUTS("Searchable Gopher Index");
573: END(HTML_TITLE);
574: END(HTML_HEAD);
575: START(HTML_BODY);
576:
1.2 timbl 577: START(HTML_H1);
2.20 frystyk 578: PUTS("Searchable Gopher Index");
1.2 timbl 579: END(HTML_H1);
2.7 secret 580: START(HTML_ISINDEX);
2.34 frystyk 581: END(HTML_BODY);
582: END(HTML_HTML);
2.42 frystyk 583: (*target->isa->_free)(target);
2.7 secret 584: }
585:
586:
587: /* Display a CSO index document
588: ** -------------------------------
2.42 frystyk 589: ** We create a small HTML object as we have no network activity
2.7 secret 590: */
2.42 frystyk 591: PRIVATE void display_cso (HTRequest * request)
2.7 secret 592: {
2.60 frystyk 593: HTParentAnchor * anchor = HTRequest_anchor(request);
2.40 frystyk 594: HTStructured *target = HTMLGenerator(request, NULL, WWW_HTML,
2.60 frystyk 595: HTRequest_outputFormat(request),
596: HTRequest_outputStream(request));
597:
2.42 frystyk 598: /* Update anchor information */
2.60 frystyk 599: HTAnchor_setFormat(anchor, WWW_HTML);
600: HTAnchor_setTitle(anchor, "Searchable SCO Index");
2.42 frystyk 601: /* @@@ We don't set Content-Length */
602:
2.34 frystyk 603: START(HTML_HTML);
604: START(HTML_HEAD);
605: START(HTML_TITLE);
606: PUTS("Searchable Index of a CSO Name Server");
607: END(HTML_TITLE);
608: END(HTML_HEAD);
609: START(HTML_BODY);
610:
2.7 secret 611: START(HTML_H1);
2.20 frystyk 612: PUTS("Searchable Index of a CSO Name Server");
2.7 secret 613: END(HTML_H1);
2.34 frystyk 614: PUTS("A CSO Name Server usually provides directory information about people.");
2.7 secret 615: START(HTML_ISINDEX);
2.34 frystyk 616: END(HTML_BODY);
617: END(HTML_HTML);
2.42 frystyk 618: (*target->isa->_free)(target);
1.1 timbl 619: }
620:
2.42 frystyk 621: /* HTLoadGopher
622: ** ------------
2.24 frystyk 623: ** Given a hypertext address, this routine loads a gopher document
624: **
625: ** On entry,
2.42 frystyk 626: ** request This is the request structure
627: ** On Exit
628: ** returns HT_ERROR Error has occured in call back
629: ** HT_OK Call back was OK
1.1 timbl 630: */
2.63 frystyk 631: PRIVATE int GopherEvent (SOCKET soc, void * pVoid, HTEventType type);
632:
633: PUBLIC int HTLoadGopher (SOCKET soc, HTRequest * request)
1.1 timbl 634: {
2.63 frystyk 635: gopher_info * gopher;
2.60 frystyk 636: HTNet * net = HTRequest_net(request);
637: HTParentAnchor * anchor = HTRequest_anchor(request);
638: char * url = HTAnchor_physical(anchor);
2.20 frystyk 639:
2.42 frystyk 640: /*
641: ** Initiate a new gopher structure and bind to request structure
642: ** This is actually state GOPHER_BEGIN, but it can't be in the state
643: ** machine as we need the structure first.
644: */
2.66 frystyk 645: HTTRACE(PROT_TRACE, "Gopher...... Looking for `%s\'\n" _ url);
2.63 frystyk 646: if ((gopher = (gopher_info *) HT_CALLOC(1, sizeof(gopher_info))) == NULL)
647: HT_OUTOFMEM("HTLoadGopher");
648: gopher->type = GT_MENU;
649: gopher->state = GOPHER_BEGIN;
650: gopher->net = net;
651: HTNet_setContext(net, gopher);
652: HTNet_setEventCallback(net, GopherEvent);
653: HTNet_setEventParam(net, gopher); /* callbacks get http* */
654:
655: return GopherEvent(soc, gopher, HTEvent_BEGIN); /* get it started - ops is ignored */
656: }
657:
658: PRIVATE int GopherEvent (SOCKET soc, void * pVoid, HTEventType type)
659: {
660: gopher_info * gopher = (gopher_info *)pVoid;
661: int status = HT_ERROR;
662: HTNet * net = gopher->net;
663: HTRequest * request = HTNet_request(net);
664: HTParentAnchor * anchor = HTRequest_anchor(request);
2.65 frystyk 665: HTHost * host = HTNet_host(net);
2.63 frystyk 666: char * url = HTAnchor_physical(anchor);
667:
668: if (type == HTEvent_CLOSE) { /* Interrupted */
2.42 frystyk 669: GopherCleanup(request, HT_INTERRUPTED);
670: return HT_OK;
671: } else
2.60 frystyk 672: gopher = (gopher_info *) HTNet_context(net); /* Get existing copy */
2.42 frystyk 673:
674: /* Now jump into the machine. We know the state from the previous run */
675: while (1) {
676: switch (gopher->state) {
677:
678: case GOPHER_BEGIN: /* Get entity type, and selector string */
679: {
680: char *path = HTParse(url, "", PARSE_PATH);
681: char *selector = path;
682: char *query = NULL;
683: char *separator = NULL;
684: if (*selector) gopher->type = (HTGopherType) *selector++;
685: if (gopher->type == GT_INDEX) {
2.60 frystyk 686: HTAnchor_setIndex(anchor); /* Is index */
2.42 frystyk 687: query = strchr(selector, '?');
688:
689: /* Display local cover page only if no search requested */
690: if (!query || !*(query+1)) { /* No search required */
691: display_index(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: separator = "\t";
698: }
699: } else if (gopher->type == GT_CSO) {
2.60 frystyk 700: HTAnchor_setIndex(anchor); /* Search is allowed */
2.42 frystyk 701: query = strchr(selector, '?'); /* Look for search string */
702:
703: /* Display local cover page only if no search requested */
704: if (!query || !*(query+1)) { /* No search required */
705: display_cso(request);
706: gopher->state = GOPHER_GOT_DATA;
2.55 frystyk 707: HT_FREE(path);
2.42 frystyk 708: break;
709: } else {
710: *query++ = 0; /* Skip '?' */
711: *selector = 0;
712: separator = "query ";
713: }
714: }
2.20 frystyk 715:
2.42 frystyk 716: /* Now generate the final command */
717: {
718: char crlf[3];
719: StrAllocCopy(gopher->cmd, selector);
720: if (query) {
721: char *p;
722: for (p=query; *p; p++) /* Remove plus signs 921006 */
723: if (*p == '+') *p = ' ';
724: StrAllocCat(gopher->cmd, separator);
725: StrAllocCat(gopher->cmd, query);
726: }
727: HTUnEscape(gopher->cmd);
728: HTCleanTelnetString(gopher->cmd); /* Prevent sec holes */
729: *crlf = CR; /* Telnet termination */
730: *(crlf+1) = LF;
731: *(crlf+2) = '0円';
732: StrAllocCat(gopher->cmd, crlf);
733: }
2.55 frystyk 734: HT_FREE(path);
2.42 frystyk 735: gopher->state = GOPHER_NEED_CONNECTION;
1.1 timbl 736: }
2.42 frystyk 737: break;
738:
739: case GOPHER_NEED_CONNECTION:
2.68 ! frystyk 740: status = HTHost_connect(host, net, url);
2.65 frystyk 741: host = HTNet_host(net);
2.42 frystyk 742: if (status == HT_OK) {
2.59 frystyk 743: /*
744: ** Check the protocol class to see if we have connected to a
745: ** the right class of server, in this case HTTP.
746: */
747: {
748: HTHost * host = HTNet_host(net);
749: char * s_class = HTHost_class(host);
750: if (s_class && strcasecomp(s_class, "gopher")) {
751: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
752: NULL, 0, "HTLoadGopher");
753: gopher->state = GOPHER_ERROR;
754: break;
755: }
756: HTHost_setClass(host, "gopher");
757: }
2.42 frystyk 758:
2.59 frystyk 759: /*
760: ** Create the stream pipe FROM the channel to the application.
761: ** The target for the input stream pipe is set up using the
762: ** stream stack.
763: */
764: {
765: if (gopher->type == GT_MENU || gopher->type == GT_INDEX)
2.63 frystyk 766: net->readStream = GopherMenu_new(request, url, NO);
2.59 frystyk 767: else if (gopher->type == GT_CSO)
2.63 frystyk 768: net->readStream = GopherMenu_new(request, url, YES);
2.59 frystyk 769: else
2.63 frystyk 770: net->readStream = HTStreamStack(WWW_UNKNOWN,
2.60 frystyk 771: HTRequest_outputFormat(request),
772: HTRequest_outputStream(request),
2.59 frystyk 773: request, NO);
2.62 frystyk 774: HTRequest_setOutputConnected(request, YES);
2.59 frystyk 775: }
2.42 frystyk 776:
2.59 frystyk 777: /*
778: ** Create the stream pipe TO the channel from the application
779: ** and hook it up to the request object
780: */
781: {
782: HTOutputStream * output = HTNet_getOutput(net, NULL, 0);
783: HTRequest_setInputStream(request, (HTStream *) output);
784: }
2.42 frystyk 785: gopher->state = GOPHER_NEED_REQUEST;
2.59 frystyk 786:
2.42 frystyk 787: } else if (status == HT_WOULD_BLOCK)
788: return HT_OK;
789: else
790: gopher->state = GOPHER_ERROR;
791: break;
792:
793: case GOPHER_NEED_REQUEST:
2.66 frystyk 794: HTTRACE(PROT_TRACE, "Gopher Tx... `%s\'" _ gopher->cmd);
2.60 frystyk 795: {
796: HTStream * input = HTRequest_inputStream(request);
797: status = (*input->isa->put_block)
798: (input, gopher->cmd, strlen(gopher->cmd));
799: if (status == HT_WOULD_BLOCK)
800: return HT_OK;
801: else if (status == HT_ERROR)
802: gopher->state = GOPHER_ERROR;
803: else
804: gopher->state = GOPHER_NEED_RESPONSE;
805: }
2.42 frystyk 806: break;
1.1 timbl 807:
2.42 frystyk 808: case GOPHER_NEED_RESPONSE:
2.63 frystyk 809: status = HTHost_read(net->host, net);
2.42 frystyk 810: if (status == HT_WOULD_BLOCK)
811: return HT_OK;
2.53 frystyk 812: else if (status == HT_LOADED || status == HT_CLOSED)
2.42 frystyk 813: gopher->state = GOPHER_GOT_DATA;
814: else
815: gopher->state = GOPHER_ERROR;
816: break;
1.2 timbl 817:
2.42 frystyk 818: case GOPHER_GOT_DATA:
819: GopherCleanup(request, HT_LOADED);
820: return HT_OK;
821: break;
822:
823: case GOPHER_NO_DATA:
824: GopherCleanup(request, HT_NO_DATA);
825: return HT_OK;
826: break;
827:
828: case GOPHER_ERROR:
829: GopherCleanup(request, HT_ERROR);
830: return HT_OK;
831: break;
2.25 frystyk 832: }
2.42 frystyk 833: } /* while(1) */
1.1 timbl 834: }
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