Annotation of libwww/Library/src/HTAccess.c, revision 1.114
1.61 frystyk 1: /* HTAccess.c
2: ** ACCESS MANAGER
3: **
1.75 frystyk 4: ** (c) COPYRIGHT MIT 1995.
1.61 frystyk 5: ** Please first read the full copyright statement in the file COPYRIGH.
1.1 timbl 6: **
7: ** Authors
1.79 frystyk 8: ** TBL Tim Berners-Lee timbl@w3.org
1.4 timbl 9: ** JFG Jean-Francois Groff jfg@dxcern.cern.ch
1.1 timbl 10: ** DD Denis DeLaRoca (310) 825-4580 <CSP1DWD@mvs.oac.ucla.edu>
11: ** History
12: ** 8 Jun 92 Telnet hopping prohibited as telnet is not secure TBL
13: ** 26 Jun 92 When over DECnet, suppressed FTP, Gopher and News. JFG
1.42 frystyk 14: ** 6 Oct 92 Moved HTClientHost and HTlogfile into here. TBL
1.1 timbl 15: ** 17 Dec 92 Tn3270 added, bug fix. DD
1.2 timbl 16: ** 4 Feb 93 Access registration, Search escapes bad chars TBL
1.9 timbl 17: ** PARAMETERS TO HTSEARCH AND HTLOADRELATIVE CHANGED
18: ** 28 May 93 WAIS gateway explicit if no WAIS library linked in.
1.19 timbl 19: ** Dec 93 Bug change around, more reentrant, etc
1.42 frystyk 20: ** 09 May 94 logfile renamed to HTlogfile to avoid clash with WAIS
1.114 ! frystyk 21: ** 8 Jul 94 Insulate HT_FREE();
1.88 frystyk 22: ** Sep 95 Rewritten, HFN
1.1 timbl 23: */
24:
1.68 frystyk 25: #if !defined(HT_DIRECT_WAIS) && !defined(HT_DEFAULT_WAIS_GATEWAY)
26: #define HT_DEFAULT_WAIS_GATEWAY "http://www.w3.org:8001/"
1.54 frystyk 27: #endif
1.8 timbl 28:
1.67 frystyk 29: /* Library include files */
1.88 frystyk 30: #include "WWWLib.h"
1.93 frystyk 31: #include "HTReqMan.h"
32: #include "HTAccess.h" /* Implemented here */
1.88 frystyk 33:
1.99 frystyk 34: #ifndef VC
35: #define VC "unknown"
36: #endif
37:
1.93 frystyk 38: PRIVATE char * HTAppName = NULL; /* Application name: please supply */
39: PRIVATE char * HTAppVersion = NULL; /* Application version: please supply */
1.2 timbl 40:
1.99 frystyk 41: PRIVATE char * HTLibName = "libwww";
42: PRIVATE char * HTLibVersion = VC;
43:
44: PRIVATE BOOL HTSecure = NO; /* Can we access local file system? */
45:
1.111 frystyk 46: #define PUTBLOCK(b, l) (*target->isa->put_block)(target, b, l)
47:
48: struct _HTStream {
49: HTStreamClass * isa;
50: };
51:
1.59 frystyk 52: /* --------------------------------------------------------------------------*/
1.61 frystyk 53: /* Initialization and Termination of the Library */
54: /* --------------------------------------------------------------------------*/
55:
1.99 frystyk 56: /* Information about the Application
57: ** ---------------------------------
1.93 frystyk 58: */
59: PUBLIC CONST char * HTLib_appName (void)
60: {
1.99 frystyk 61: return HTAppName ? HTAppName : "UNKNOWN";
62: }
63:
64: PUBLIC CONST char * HTLib_appVersion (void)
65: {
66: return HTAppVersion ? HTAppVersion : "0.0";
1.93 frystyk 67: }
68:
1.99 frystyk 69: /* Information about libwww
70: ** ------------------------
71: */
72: PUBLIC CONST char * HTLib_name (void)
73: {
74: return HTLibName ? HTLibName : "UNKNOWN";
75: }
76:
77: PUBLIC CONST char * HTLib_version (void)
78: {
79: return HTLibVersion ? HTLibVersion : "0.0";
80: }
81:
82: /* Access Local File System
83: ** ------------------------
84: ** In this mode we do not tough the local file system at all
1.93 frystyk 85: */
1.99 frystyk 86: PUBLIC BOOL HTLib_secure (void)
87: {
88: return HTSecure;
89: }
90:
91: PUBLIC void HTLib_setSecure (BOOL mode)
1.93 frystyk 92: {
1.99 frystyk 93: HTSecure = mode;
1.93 frystyk 94: }
95:
1.61 frystyk 96: /* HTLibInit
97: **
98: ** This function initiates the Library and it MUST be called when
99: ** starting up an application. See also HTLibTerminate()
100: */
1.93 frystyk 101: PUBLIC BOOL HTLibInit (CONST char * AppName, CONST char * AppVersion)
1.61 frystyk 102: {
1.105 frystyk 103: #ifdef WWW_WIN_ASYNC
1.110 frystyk 104: /*
105: ** We are here starting a hidden window to take care of events from
106: ** the async select() call in the async version of the event loop in
107: ** the Internal event manager (HTEvntrg.c)
108: */
1.105 frystyk 109: HWND htSocketWin;
110: static char className[] = "AsyncWindowClass";
111: WNDCLASS wc;
1.113 frystyk 112: OSVERSIONINFO osInfo;
1.105 frystyk 113:
114: wc.style=0;
115: wc.lpfnWndProc=(WNDPROC)AsyncWindowProc;
116: wc.cbClsExtra=0;
117: wc.cbWndExtra=0;
118: wc.hIcon=0;
119: wc.hCursor=0;
120: wc.hbrBackground=0;
121: wc.lpszMenuName=(LPSTR)0;
122: wc.lpszClassName=className;
1.113 frystyk 123:
124: osInfo.dwOSVersionInfoSize = sizeof(osInfo);
125: GetVersionEx(&osInfo);
126: if (osInfo.dwPlatformId == VER_PLATFORM_WIN32s || osInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
127: wc.hInstance=GetModuleHandle(NULL); /* 95 and non threaded platforms */
128: else
129: wc.hInstance=GetCurrentProcess(); /* NT and hopefully everything following */
1.105 frystyk 130: #endif /* WWW_WIN_ASYNC */
131:
1.97 frystyk 132: #if WWWTRACE_MODE == WWWTRACE_FILE /* Open trace file */
1.102 frystyk 133: if ((TDEST = fopen(HT_TRACE_FILE, "a")) != NULL) {
1.67 frystyk 134: if (setvbuf(TDEST, NULL, _IOLBF, 0) < 0) { /* Change to line buffer */
1.97 frystyk 135: TTYPrint(TDEST, "WWWLibInit.. Can't initialize TRACE buffer - no TRACE\n");
1.67 frystyk 136: fclose(TDEST);
137: TDEST = NULL;
138: WWW_TraceFlag = 0;
139: }
140: } else
141: WWW_TraceFlag = 0;
1.97 frystyk 142: #endif /* WWWTRACE_FILE */
1.67 frystyk 143:
1.91 frystyk 144: if (WWWTRACE)
1.97 frystyk 145: TTYPrint(TDEST, "WWWLibInit.. INITIALIZING LIBRARY OF COMMON CODE\n");
1.63 frystyk 146:
1.93 frystyk 147: /* Set the application name and version */
148: if (AppName) {
149: char *ptr;
150: StrAllocCopy(HTAppName, AppName);
151: ptr = HTAppName;
152: while (*ptr) {
153: if (WHITE(*ptr)) *ptr = '_';
154: ptr++;
155: }
156: }
157: if (AppVersion) {
158: char *ptr;
159: StrAllocCopy(HTAppVersion, AppVersion);
160: ptr = HTAppVersion;
161: while (*ptr) {
162: if (WHITE(*ptr)) *ptr = '_';
163: ptr++;
164: }
165: }
166:
167: HTBind_init(); /* Initialize bindings */
1.61 frystyk 168:
1.62 frystyk 169: #ifdef WWWLIB_SIG
1.61 frystyk 170: /* On Solaris (and others?) we get a BROKEN PIPE signal when connecting
1.67 frystyk 171: ** to a port where we should get `connection refused'. We ignore this
1.61 frystyk 172: ** using the following function call
173: */
174: HTSetSignal(); /* Set signals in library */
1.1 timbl 175: #endif
176:
1.105 frystyk 177: #ifdef WWW_WIN_ASYNC
178: if (!RegisterClass(&wc)) {
179: TTYPrint(TDEST, "HTEvent_Loop.. Can't RegisterClass \"%s\"\n", className);
180: return NO;
181: }
1.113 frystyk 182: if (!(htSocketWin = CreateWindow(className, "WWW_WIN_ASYNC", WS_POPUP, CW_USEDEFAULT, CW_USEDEFAULT,
183: CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, wc.hInstance,0))) {
184: char space[50];
185: TTYPrint(TDEST, "HTEvent_Loop.. Can't CreateWindow \"WWW_WIN_ASYNC\" - error:");
186: sprintf(space, "%ld\n", GetLastError());
187: TTYPrint(TDEST, space);
1.105 frystyk 188: return NO;
189: }
190: HTEvent_setWinHandle (htSocketWin, WM_USER); /* use first available message since app uses none */
191: #endif /* WWW_WIN_ASYNC */
192:
1.108 frystyk 193: #ifdef _WINSOCKAPI_
1.67 frystyk 194: /*
195: ** Initialise WinSock DLL. This must also be shut down! PMH
196: */
197: {
198: WSADATA wsadata;
199: if (WSAStartup(DESIRED_WINSOCK_VERSION, &wsadata)) {
1.91 frystyk 200: if (WWWTRACE)
1.97 frystyk 201: TTYPrint(TDEST, "WWWLibInit.. Can't initialize WinSoc\n");
1.67 frystyk 202: WSACleanup();
203: return NO;
204: }
205: if (wsadata.wVersion < MINIMUM_WINSOCK_VERSION) {
1.91 frystyk 206: if (WWWTRACE)
1.97 frystyk 207: TTYPrint(TDEST, "WWWLibInit.. Bad version of WinSoc\n");
1.67 frystyk 208: WSACleanup();
209: return NO;
210: }
211: }
1.108 frystyk 212: #endif /* _WINSOCKAPI_ */
1.67 frystyk 213:
1.71 frystyk 214: #ifndef NO_TIMEGM
215: HTGetTimeZoneOffset(); /* Find offset from GMT if using mktime() */
216: #endif
1.70 frystyk 217: HTTmp_setRoot(NULL); /* Set up default tmp directory */
1.61 frystyk 218: return YES;
219: }
220:
221:
1.90 frystyk 222: /* HTLibTerminate
223: ** --------------
1.61 frystyk 224: ** This function frees memory kept by the Library and should be called
1.63 frystyk 225: ** before exit of an application (if you are on a PC platform)
1.61 frystyk 226: */
1.101 frystyk 227: PUBLIC BOOL HTLibTerminate (void)
1.61 frystyk 228: {
1.91 frystyk 229: if (WWWTRACE)
1.97 frystyk 230: TTYPrint(TDEST, "WWWLibTerm.. Cleaning up LIBRARY OF COMMON CODE\n");
1.101 frystyk 231: HTAtom_deleteAll(); /* Remove the atoms */
232: HTDNS_deleteAll(); /* Remove the DNS host cache */
233: HTAnchor_deleteAll(NULL); /* Delete anchors and drop hyperdocs */
1.73 frystyk 234:
1.81 frystyk 235: HTProtocol_deleteAll(); /* Remove bindings between access and protocols */
1.73 frystyk 236: HTBind_deleteAll(); /* Remove bindings between suffixes, media types */
237:
1.77 frystyk 238: HTFreeHostName(); /* Free up some internal strings */
1.63 frystyk 239: HTFreeMailAddress();
1.70 frystyk 240: HTTmp_freeRoot();
1.67 frystyk 241:
1.108 frystyk 242: #ifdef _WINSOCKAPI_
1.67 frystyk 243: WSACleanup();
1.105 frystyk 244: #endif
245:
246: #ifdef WWW_WIN_ASYNC
247: DestroyWindow(HTEvent_getWinHandle(0));
1.67 frystyk 248: #endif
249:
1.97 frystyk 250: #if WWWTRACE_MODE == WWWTRACE_FILE /* Close trace file */
1.67 frystyk 251: if (TDEST) {
252: fclose(TDEST);
253: TDEST = NULL;
254: WWW_TraceFlag = 0;
255: }
1.97 frystyk 256: #endif /* WWWTRACE_FILE */
1.61 frystyk 257: return YES;
258: }
259:
1.59 frystyk 260: /* --------------------------------------------------------------------------*/
1.104 frystyk 261: /* Load Access functions */
1.59 frystyk 262: /* --------------------------------------------------------------------------*/
1.33 luotonen 263:
1.90 frystyk 264: /* Request a document
265: ** -----------------
266: ** Private version that requests a document from the request manager
267: ** Returns YES if request accepted, else NO
1.88 frystyk 268: */
1.101 frystyk 269: PRIVATE BOOL HTLoadDocument (HTRequest * request, BOOL recursive)
1.88 frystyk 270: {
271: if (PROT_TRACE) {
1.90 frystyk 272: HTParentAnchor *anchor = HTRequest_anchor(request);
273: char * full_address = HTAnchor_address((HTAnchor *) anchor);
1.97 frystyk 274: TTYPrint(TDEST, "HTAccess.... Accessing document %s\n", full_address);
1.114 ! frystyk 275: HT_FREE(full_address);
1.88 frystyk 276: }
1.96 frystyk 277: return HTLoad(request, recursive);
1.58 frystyk 278: }
1.1 timbl 279:
280:
1.90 frystyk 281: /* Request a document from absolute name
282: ** -------------------------------------
283: ** Request a document referencd by an absolute URL.
284: ** Returns YES if request accepted, else NO
285: */
286: PUBLIC BOOL HTLoadAbsolute (CONST char * url, HTRequest* request)
287: {
288: if (url && request) {
289: HTAnchor * anchor = HTAnchor_findAddress(url);
290: HTRequest_setAnchor(request, anchor);
291: return HTLoadDocument(request, NO);
292: }
293: return NO;
294: }
295:
296:
297: /* Request a document from absolute name to stream
298: ** -----------------------------------------------
299: ** Request a document referencd by an absolute URL and sending the data
300: ** down a stream. This is _excactly_ the same as HTLoadAbsolute as
301: ** the ourputstream is specified using the function
302: ** HTRequest_setOutputStream(). 'filter' is ignored!
303: ** Returns YES if request accepted, else NO
304: */
305: PUBLIC BOOL HTLoadToStream (CONST char * url, BOOL filter, HTRequest *request)
306: {
307: return HTLoadAbsolute(url, request);
308: }
309:
310:
311: /* Request a document from relative name
312: ** -------------------------------------
313: ** Request a document referenced by a relative URL. The relative URL is
314: ** made absolute by resolving it relative to the address of the 'base'
315: ** anchor.
316: ** Returns YES if request accepted, else NO
317: */
318: PUBLIC BOOL HTLoadRelative (CONST char * relative,
319: HTParentAnchor * base,
320: HTRequest * request)
321: {
322: BOOL status = NO;
323: if (relative && base && request) {
324: char * rel = NULL;
325: char * full_url = NULL;
326: char * base_url = HTAnchor_address((HTAnchor *) base);
327: StrAllocCopy(rel, relative);
328: full_url = HTParse(HTStrip(rel), base_url,
329: PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
330: status = HTLoadAbsolute(full_url, request);
1.114 ! frystyk 331: HT_FREE(rel);
! 332: HT_FREE(full_url);
! 333: HT_FREE(base_url);
1.90 frystyk 334: }
335: return status;
336: }
337:
338:
339: /* Request an anchor
340: ** -----------------
341: ** Request the document referenced by the anchor
342: ** Returns YES if request accepted, else NO
343: */
344: PUBLIC BOOL HTLoadAnchor (HTAnchor * anchor, HTRequest * request)
345: {
346: if (anchor && request) {
347: HTRequest_setAnchor(request, anchor);
348: return HTLoadDocument(request, NO);
349: }
350: return NO;
351: }
352:
353:
354: /* Request an anchor
355: ** -----------------
356: ** Same as HTLoadAnchor but any information in the Error Stack in the
357: ** request object is kept, so that any error messages in one
1.52 frystyk 358: ** This function is almost identical to HTLoadAnchor, but it doesn't
359: ** clear the error stack so that the information in there is kept.
1.90 frystyk 360: ** Returns YES if request accepted, else NO
361: */
362: PUBLIC BOOL HTLoadAnchorRecursive (HTAnchor * anchor, HTRequest * request)
363: {
364: if (anchor && request) {
365: HTRequest_setAnchor(request, anchor);
366: return HTLoadDocument(request, YES);
367: }
368: return NO;
369: }
370:
371:
372: /* Search an Anchor
373: ** ----------------
374: ** Performs a keyword search on word given by the user. Adds the keyword
375: ** to the end of the current address and attempts to open the new address.
376: ** The list of keywords must be a space-separated list and spaces will
377: ** be converted to '+' before the request is issued.
378: ** Search can also be performed by HTLoadAbsolute() etc.
379: ** Returns YES if request accepted, else NO
380: */
381: PUBLIC BOOL HTSearch (CONST char * keywords,
382: HTParentAnchor * base,
383: HTRequest * request)
384: {
1.99 frystyk 385: BOOL status = NO;
1.90 frystyk 386: if (keywords && base && request) {
387: char *base_url = HTAnchor_address((HTAnchor *) base);
388: if (*keywords) {
389: char *plus;
390: StrAllocCat(base_url, "?");
391: StrAllocCat(base_url, keywords);
392: plus = strchr(base_url, '?');
393: while (*plus) {
394: if (*plus == ' ') *plus = '+';
395: plus++;
396: }
1.2 timbl 397: }
1.99 frystyk 398: status = HTLoadAbsolute(base_url, request);
1.114 ! frystyk 399: HT_FREE(base_url);
1.90 frystyk 400: }
1.99 frystyk 401: return status;
1.2 timbl 402: }
403:
404:
1.90 frystyk 405: /* Search a document from absolute name
406: ** ------------------------------------
407: ** Request a document referencd by an absolute URL appended with the
408: ** keywords given. The URL can NOT contain any fragment identifier!
409: ** The list of keywords must be a space-separated list and spaces will
410: ** be converted to '+' before the request is issued.
411: ** Returns YES if request accepted, else NO
412: */
413: PUBLIC BOOL HTSearchAbsolute (CONST char * keywords,
414: CONST char * url,
415: HTRequest * request)
416: {
417: if (url && request) {
418: HTAnchor * anchor = HTAnchor_findAddress(url);
419: return HTSearch(keywords, HTAnchor_parent(anchor), request);
420: }
421: return NO;
1.57 howcome 422: }
423:
1.70 frystyk 424: /* --------------------------------------------------------------------------*/
1.104 frystyk 425: /* Post Access Functions */
1.70 frystyk 426: /* --------------------------------------------------------------------------*/
427:
1.90 frystyk 428: /* Copy an anchor
1.70 frystyk 429: ** --------------
1.90 frystyk 430: ** Fetch the URL (possibly local file URL) and send it using either PUT
431: ** or POST to the remote destination using HTTP. The caller can decide the
432: ** exact method used and which HTTP header fields to transmit by setting
433: ** the user fields in the request structure.
1.92 frystyk 434: ** If posting to NNTP then we can't dispatch at this level but must pass
435: ** the source anchor to the news module that then takes all the refs
436: ** to NNTP and puts into the "newsgroups" header
1.90 frystyk 437: ** Returns YES if request accepted, else NO
1.70 frystyk 438: */
1.109 frystyk 439: PUBLIC BOOL HTCopyAnchor (HTAnchor * src_anchor, HTRequest * main_dest)
1.80 frystyk 440: {
1.106 frystyk 441: HTRequest * src_req;
442: HTList * cur;
1.109 frystyk 443: if (!src_anchor || !main_dest) {
444: if (WWWTRACE) TTYPrint(TDEST, "Copy........ BAD ARGUMENT\n");
1.90 frystyk 445: return NO;
1.109 frystyk 446: }
1.70 frystyk 447:
1.112 frystyk 448: /* Set the source anchor */
449: main_dest->source_anchor = HTAnchor_parent(src_anchor);
450:
1.80 frystyk 451: /* Build the POST web if not already there */
1.109 frystyk 452: if (!main_dest->source) {
453: src_req = HTRequest_dupInternal(main_dest); /* Get a duplicate */
1.80 frystyk 454: HTAnchor_clearHeader((HTParentAnchor *) src_anchor);
1.109 frystyk 455: src_req->method = METHOD_GET;
1.85 frystyk 456: src_req->reload = HT_MEM_REFRESH;
1.104 frystyk 457: src_req->output_stream = NULL;
1.80 frystyk 458: src_req->output_format = WWW_SOURCE; /* We want source (for now) */
459:
460: /* Set up the main link in the source anchor */
461: {
1.106 frystyk 462: HTLink * main_link = HTAnchor_mainLink((HTAnchor *) src_anchor);
463: HTAnchor *main_anchor = HTLink_destination(main_link);
464: HTMethod method = HTLink_method(main_link);
1.85 frystyk 465: if (!main_link || method==METHOD_INVALID) {
1.91 frystyk 466: if (WWWTRACE)
1.109 frystyk 467: TTYPrint(TDEST, "Copy Anchor. No destination found or unspecified method\n");
1.80 frystyk 468: HTRequest_delete(src_req);
1.90 frystyk 469: return NO;
1.80 frystyk 470: }
1.109 frystyk 471: main_dest->GenMask |= HT_G_DATE; /* Send date header */
472: main_dest->reload = HT_CACHE_REFRESH;
473: main_dest->method = method;
474: main_dest->input_format = WWW_SOURCE;
475: HTRequest_addDestination(src_req, main_dest);
476: if (HTLoadAnchor(main_anchor, main_dest) == NO)
477: return NO;
1.80 frystyk 478: }
1.78 frystyk 479:
1.80 frystyk 480: /* For all other links in the source anchor */
1.106 frystyk 481: if ((cur = HTAnchor_subLinks(src_anchor))) {
482: HTLink * pres;
1.109 frystyk 483: while ((pres = (HTLink *) HTList_nextObject(cur))) {
1.106 frystyk 484: HTAnchor *dest = HTLink_destination(pres);
485: HTMethod method = HTLink_method(pres);
1.80 frystyk 486: HTRequest *dest_req;
487: if (!dest || method==METHOD_INVALID) {
1.91 frystyk 488: if (WWWTRACE)
1.97 frystyk 489: TTYPrint(TDEST, "Copy Anchor. Bad anchor setup %p\n",
1.80 frystyk 490: dest);
1.90 frystyk 491: return NO;
1.80 frystyk 492: }
1.109 frystyk 493: dest_req = HTRequest_dupInternal(main_dest);
1.107 frystyk 494: dest_req->GenMask |= HT_G_DATE; /* Send date header */
1.85 frystyk 495: dest_req->reload = HT_CACHE_REFRESH;
1.80 frystyk 496: dest_req->method = method;
1.104 frystyk 497: dest_req->output_stream = NULL;
498: dest_req->output_format = WWW_SOURCE;
1.109 frystyk 499: HTRequest_addDestination(src_req, dest_req);
1.104 frystyk 500:
1.90 frystyk 501: if (HTLoadAnchor(dest, dest_req) == NO)
502: return NO;
1.80 frystyk 503: }
504: }
505: } else { /* Use the existing Post Web and restart it */
1.109 frystyk 506: src_req = main_dest->source;
1.80 frystyk 507: if (src_req->mainDestination)
1.109 frystyk 508: if (HTLoadDocument(main_dest, NO) == NO)
1.90 frystyk 509: return NO;
1.80 frystyk 510: if (src_req->destinations) {
1.106 frystyk 511: HTRequest * pres;
512: cur = HTAnchor_subLinks(src_anchor);
1.80 frystyk 513: while ((pres = (HTRequest *) HTList_nextObject(cur)) != NULL) {
1.90 frystyk 514: if (HTLoadDocument(pres, NO) == NO)
515: return NO;
1.80 frystyk 516: }
517: }
1.78 frystyk 518: }
519:
1.80 frystyk 520: /* Now open the source */
521: return HTLoadAnchor(src_anchor, src_req);
1.70 frystyk 522: }
523:
524:
1.90 frystyk 525: /* Upload an Anchor
1.70 frystyk 526: ** ----------------
1.111 frystyk 527: ** This function can be used to send data along with a request to a remote
528: ** server. It can for example be used to POST form data to a remote HTTP
529: ** server - or it can be used to post a newsletter to a NNTP server. In
530: ** either case, you pass a callback function which the request calls when
531: ** the remote destination is ready to accept data. In this callback
532: ** you get the current request object and a stream into where you can
533: ** write data. It is very important that you return the value returned
534: ** by this stream to the Library so that it knows what to do next. The
535: ** reason is that the outgoing stream might block or an error may
536: ** occur and in that case the Library must know about it. The source
537: ** anchor represents the data object in memory and it points to
538: ** the destination anchor by using the POSTWeb method. The source anchor
539: ** contains metainformation about the data object in memory and the
540: ** destination anchor represents the reponse from the remote server.
1.90 frystyk 541: ** Returns YES if request accepted, else NO
542: */
1.111 frystyk 543: PUBLIC BOOL HTUploadAnchor (HTAnchor * source_anchor,
544: HTRequest * request,
545: HTPostCallback * callback)
546: {
547: HTLink * link = HTAnchor_mainLink((HTAnchor *) source_anchor);
548: HTAnchor * dest_anchor = HTLink_destination(link);
549: HTMethod method = HTLink_method(link);
550: if (!link || method==METHOD_INVALID || !callback) {
551: if (WWWTRACE)
552: TTYPrint(TDEST, "Upload...... No destination found or unspecified method\n");
1.90 frystyk 553: return NO;
1.109 frystyk 554: }
1.111 frystyk 555: request->GenMask |= HT_G_DATE; /* Send date header */
556: request->reload = HT_CACHE_REFRESH;
557: request->method = method;
558: request->source_anchor = HTAnchor_parent(source_anchor);
559: request->PostCallback = callback;
560: return HTLoadAnchor(dest_anchor, request);
561: }
562:
563: /* POST Callback Handler
564: ** ---------------------
565: ** If you do not want to handle the stream interface on your own, you
566: ** can use this function which writes the source anchor hyperdoc to the
567: ** target stream for the anchor upload and also handles the return value
568: ** from the stream. If you don't want to write the source anchor hyperdoc
569: ** then you can register your own callback function that can get the data
570: ** you want.
571: */
572: PUBLIC int HTUpload_callback (HTRequest * request, HTStream * target)
573: {
574: if (WWWTRACE) TTYPrint(TDEST, "Uploading... from callback function\n");
575: if (!request || !request->source_anchor || !target) return HT_ERROR;
576: {
577: int status;
578: HTParentAnchor * source = request->source_anchor;
579: char * document = (char *) HTAnchor_document(request->source_anchor);
580: int len = HTAnchor_length(source);
581: if (len < 0) {
582: len = strlen(document);
583: HTAnchor_setLength(source, len);
584: }
585: status = (*target->isa->put_block)(target, document, len);
586: if (status == HT_OK)
587: return (*target->isa->flush)(target);
588: if (status == HT_WOULD_BLOCK) {
589: if (PROT_TRACE)TTYPrint(TDEST,"POST Anchor. Target WOULD BLOCK\n");
590: return HT_WOULD_BLOCK;
591: } else if (status == HT_PAUSE) {
592: if (PROT_TRACE) TTYPrint(TDEST,"POST Anchor. Target PAUSED\n");
593: return HT_PAUSE;
594: } else if (status > 0) { /* Stream specific return code */
595: if (PROT_TRACE)
596: TTYPrint(TDEST, "POST Anchor. Target returns %d\n", status);
597: return status;
598: } else { /* We have a real error */
599: if (PROT_TRACE) TTYPrint(TDEST, "POST Anchor. Target ERROR\n");
600: return status;
601: }
1.70 frystyk 602: }
1.1 timbl 603: }
Webmaster
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to HTAccess.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Public] / libwww / Library / src