Annotation of libwww/Library/src/HTTP.c, revision 1.123
1.74 frystyk 1: /* HTTP.c
2: ** MULTITHREADED IMPLEMENTATION OF HTTP CLIENT
1.2 timbl 3: **
1.84 frystyk 4: ** (c) COPYRIGHT MIT 1995.
1.74 frystyk 5: ** Please first read the full copyright statement in the file COPYRIGH.
1.123 ! frystyk 6: ** @(#) $Id: HTTP.c,v 1.122 1996年03月19日 14:28:39 frystyk Exp $
1.74 frystyk 7: **
8: ** This module implments the HTTP protocol as a state machine
1.55 frystyk 9: **
10: ** History:
1.59 frystyk 11: ** < May 24 94 ?? Unknown - but obviously written
1.56 frystyk 12: ** May 24 94 HF Made reentrent and cleaned up a bit. Implemented
13: ** Forward, redirection, error handling and referer field
1.67 duns 14: ** 8 Jul 94 FM Insulate free() from _free structure element.
1.71 frystyk 15: ** Jul 94 HFN Written on top of HTTP.c, Henrik Frystyk
1.55 frystyk 16: **
1.1 timbl 17: */
18:
1.78 frystyk 19: /* Library include files */
1.119 frystyk 20: #include "sysdep.h"
1.123 ! frystyk 21: #include "WWWUtil.h"
! 22: #include "WWWCore.h"
! 23: #include "WWWCache.h"
! 24: #include "WWWMIME.h"
! 25: #include "WWWStream.h"
1.1 timbl 26: #include "HTTCP.h"
1.94 frystyk 27: #include "HTReqMan.h"
1.95 frystyk 28: #include "HTNetMan.h"
1.109 frystyk 29: #include "HTTPUtil.h"
1.80 frystyk 30: #include "HTTPReq.h"
1.55 frystyk 31: #include "HTTP.h" /* Implements */
32:
33: /* Macros and other defines */
1.94 frystyk 34: #ifndef HTTP_PORT
35: #define HTTP_PORT 80 /* Allocated to http by Jon Postel/ISI 24-Jan-92 */
36: #endif
37:
1.71 frystyk 38: #define PUTC(c) (*me->target->isa->put_character)(me->target, c)
39: #define PUTS(s) (*me->target->isa->put_string)(me->target, s)
40: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
41: #define FREE_TARGET (*me->target->isa->_free)(me->target)
1.74 frystyk 42: #define ABORT_TARGET (*me->target->isa->abort)(me->target, e)
1.2 timbl 43:
1.59 frystyk 44: /* Type definitions and global variables etc. local to this module */
1.94 frystyk 45:
46: /* Final states have negative value */
1.59 frystyk 47: typedef enum _HTTPState {
1.81 frystyk 48: HTTP_RETRY = -4,
1.71 frystyk 49: HTTP_ERROR = -3,
50: HTTP_NO_DATA = -2,
51: HTTP_GOT_DATA = -1,
52: HTTP_BEGIN = 0,
53: HTTP_NEED_CONNECTION,
54: HTTP_NEED_REQUEST,
1.112 frystyk 55: HTTP_PERM_REDIRECT,
56: HTTP_TEMP_REDIRECT,
1.91 frystyk 57: HTTP_NOT_MODIFIED,
1.71 frystyk 58: HTTP_AA
1.59 frystyk 59: } HTTPState;
1.55 frystyk 60:
1.94 frystyk 61: /* This is the context structure for the this module */
1.55 frystyk 62: typedef struct _http_info {
1.81 frystyk 63: HTTPState state; /* Current State of the connection */
64: HTTPState next; /* Next state */
1.55 frystyk 65: } http_info;
66:
1.88 frystyk 67: #define MAX_STATUS_LEN 100 /* Max nb of chars to check StatusLine */
1.55 frystyk 68:
1.71 frystyk 69: struct _HTStream {
1.119 frystyk 70: const HTStreamClass * isa;
1.71 frystyk 71: HTStream * target;
72: HTRequest * request;
73: http_info * http;
1.121 frystyk 74: HTEOLState state;
1.71 frystyk 75: BOOL transparent;
1.81 frystyk 76: char * version; /* Should we save this? */
1.71 frystyk 77: int status;
1.81 frystyk 78: char * reason;
1.71 frystyk 79: char buffer[MAX_STATUS_LEN+1];
1.80 frystyk 80: int buflen;
1.71 frystyk 81: };
1.21 luotonen 82:
1.123 ! frystyk 83: struct _HTInputStream {
! 84: const HTInputStreamClass * isa;
! 85: };
! 86:
1.71 frystyk 87: /* ------------------------------------------------------------------------- */
88: /* Help Functions */
89: /* ------------------------------------------------------------------------- */
1.21 luotonen 90:
1.94 frystyk 91: /* HTTPCleanup
92: ** -----------
1.55 frystyk 93: ** This function closes the connection and frees memory.
1.94 frystyk 94: ** Returns YES on OK, else NO
1.1 timbl 95: */
1.94 frystyk 96: PRIVATE int HTTPCleanup (HTRequest *req, int status)
1.1 timbl 97: {
1.94 frystyk 98: HTNet *net = req->net;
99: http_info *http = (http_info *) net->context;
1.80 frystyk 100:
1.94 frystyk 101: /* Free stream with data TO network */
1.112 frystyk 102: if (HTRequest_isDestination(req))
103: HTRequest_removeDestination(req);
104: else if (req->input_stream) {
1.94 frystyk 105: if (status == HT_INTERRUPTED)
106: (*req->input_stream->isa->abort)(req->input_stream, NULL);
107: else
108: (*req->input_stream->isa->_free)(req->input_stream);
1.104 frystyk 109: req->input_stream = NULL;
1.94 frystyk 110: }
1.88 frystyk 111:
1.112 frystyk 112: /* Free user part of stream pipe if error */
1.123 ! frystyk 113: #if 0
1.112 frystyk 114: if (!net->target && req->output_stream)
115: (*req->output_stream->isa->abort)(req->output_stream, NULL);
1.123 ! frystyk 116: #endif
1.112 frystyk 117:
1.94 frystyk 118: /* Remove the request object and our own context structure for http */
1.112 frystyk 119: HTNet_delete(net, req->internal ? HT_IGNORE : status);
1.115 frystyk 120: HT_FREE(http);
1.94 frystyk 121: return YES;
1.55 frystyk 122: }
123:
1.71 frystyk 124: /*
125: ** This is a big switch handling all HTTP return codes. It puts in any
126: ** appropiate error message and decides whether we should expect data
1.78 frystyk 127: ** or not.
1.55 frystyk 128: */
1.100 frystyk 129: PRIVATE void HTTPNextState (HTStream * me)
1.55 frystyk 130: {
1.71 frystyk 131: switch (me->status) {
132:
1.78 frystyk 133: case 0: /* 0.9 response */
134: case 200:
1.112 frystyk 135: me->http->next = HTTP_GOT_DATA;
136: break;
137:
1.78 frystyk 138: case 201:
1.112 frystyk 139: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CREATED,
140: me->reason, (int) strlen(me->reason),
141: "HTTPNextState");
142: me->http->next = HTTP_GOT_DATA;
143: break;
144:
1.78 frystyk 145: case 202:
1.112 frystyk 146: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_ACCEPTED,
147: me->reason, (int) strlen(me->reason),
148: "HTTPNextState");
149: me->http->next = HTTP_GOT_DATA;
150: break;
151:
1.78 frystyk 152: case 203:
1.112 frystyk 153: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PARTIAL,
154: me->reason, (int) strlen(me->reason),
155: "HTTPNextState");
1.81 frystyk 156: me->http->next = HTTP_GOT_DATA;
1.71 frystyk 157: break;
1.78 frystyk 158:
159: case 204: /* No Response */
1.112 frystyk 160: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NO_CONTENT,
161: me->reason, (int) strlen(me->reason),
162: "HTTPNextState");
1.81 frystyk 163: me->http->next = HTTP_NO_DATA;
1.71 frystyk 164: break;
1.78 frystyk 165:
1.71 frystyk 166: case 301: /* Moved */
1.112 frystyk 167: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MOVED,
168: me->reason, (int) strlen(me->reason),
169: "HTTPNextState");
170: me->http->next = HTTP_PERM_REDIRECT;
171: break;
172:
1.71 frystyk 173: case 302: /* Found */
1.112 frystyk 174: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_FOUND,
175: me->reason, (int) strlen(me->reason),
176: "HTTPNextState");
177: me->http->next = HTTP_TEMP_REDIRECT;
1.71 frystyk 178: break;
1.55 frystyk 179:
1.71 frystyk 180: case 303: /* Method */
1.107 frystyk 181: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
182: me->reason, (int) strlen(me->reason),
183: "HTTPNextState");
1.81 frystyk 184: me->http->next = HTTP_ERROR;
1.71 frystyk 185: break;
1.91 frystyk 186:
187: case 304: /* Not Modified */
1.112 frystyk 188: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_MODIFIED,
189: me->reason, (int) strlen(me->reason),
190: "HTTPNextState");
1.91 frystyk 191: me->http->next = HTTP_NOT_MODIFIED;
192: break;
1.55 frystyk 193:
1.78 frystyk 194: case 400: /* Bad Request */
1.104 frystyk 195: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
1.100 frystyk 196: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 197: me->http->next = HTTP_ERROR;
1.71 frystyk 198: break;
1.70 howcome 199:
1.71 frystyk 200: case 401:
1.104 frystyk 201: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.100 frystyk 202: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 203: me->http->next = HTTP_AA;
1.71 frystyk 204: break;
205:
206: case 402: /* Payment required */
1.104 frystyk 207: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
1.100 frystyk 208: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 209: me->http->next = HTTP_ERROR;
1.71 frystyk 210: break;
1.55 frystyk 211:
1.71 frystyk 212: case 403: /* Forbidden */
1.104 frystyk 213: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
1.100 frystyk 214: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 215: me->http->next = HTTP_ERROR;
1.71 frystyk 216: break;
1.55 frystyk 217:
1.71 frystyk 218: case 404: /* Not Found */
1.104 frystyk 219: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
1.100 frystyk 220: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 221: me->http->next = HTTP_ERROR;
1.71 frystyk 222: break;
223:
1.78 frystyk 224: case 405: /* Not Allowed */
1.104 frystyk 225: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
1.100 frystyk 226: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 227: me->http->next = HTTP_ERROR;
1.78 frystyk 228: break;
229:
230: case 406: /* None Acceptable */
1.104 frystyk 231: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
1.100 frystyk 232: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 233: me->http->next = HTTP_ERROR;
1.78 frystyk 234: break;
235:
236: case 407: /* Proxy Authentication Required */
1.104 frystyk 237: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PROXY,
1.100 frystyk 238: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 239: me->http->next = HTTP_ERROR;
1.78 frystyk 240: break;
241:
242: case 408: /* Request Timeout */
1.104 frystyk 243: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
1.100 frystyk 244: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 245: me->http->next = HTTP_ERROR;
1.78 frystyk 246: break;
247:
1.71 frystyk 248: case 500:
1.104 frystyk 249: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
1.100 frystyk 250: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 251: me->http->next = HTTP_ERROR;
1.78 frystyk 252: break;
253:
1.71 frystyk 254: case 501:
1.104 frystyk 255: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
1.100 frystyk 256: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 257: me->http->next = HTTP_ERROR;
1.78 frystyk 258: break;
259:
260: case 502:
1.104 frystyk 261: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
1.100 frystyk 262: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 263: me->http->next = HTTP_ERROR;
1.78 frystyk 264: break;
265:
266: case 503:
1.104 frystyk 267: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_DOWN,
1.100 frystyk 268: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 269:
270: /* If Retry-After header is found then return HT_RETRY else HT_ERROR */
271: if (me->request->retry_after)
272: me->http->next = HTTP_RETRY;
273: else
274: me->http->next = HTTP_ERROR;
1.78 frystyk 275: break;
276:
277: case 504:
1.104 frystyk 278: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
1.100 frystyk 279: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 280: me->http->next = HTTP_ERROR;
1.71 frystyk 281: break;
1.78 frystyk 282:
1.71 frystyk 283: default: /* bad number */
1.104 frystyk 284: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.100 frystyk 285: (void *) me->buffer, me->buflen, "HTTPNextState");
1.81 frystyk 286: me->http->next = HTTP_ERROR;
1.71 frystyk 287: break;
1.55 frystyk 288: }
289: }
290:
1.71 frystyk 291: /* ------------------------------------------------------------------------- */
292: /* HTTP Status Line Stream */
293: /* ------------------------------------------------------------------------- */
1.55 frystyk 294:
1.71 frystyk 295: /*
1.80 frystyk 296: ** Analyse the stream we have read. If it is a HTTP 1.0 or higher
1.71 frystyk 297: ** then create a MIME-stream, else create a Guess stream to find out
298: ** what the 0.9 server is sending. We need to copy the buffer as we don't
299: ** know if we can modify the contents or not.
1.78 frystyk 300: **
301: ** Stream handling is a function of the status code returned from the
302: ** server:
303: ** 200: Use `output_stream' in HTRequest structure
1.94 frystyk 304: ** else: Use `debug_stream' in HTRequest structure
1.80 frystyk 305: **
306: ** Return: YES if buffer should be written out. NO otherwise
1.56 frystyk 307: */
1.100 frystyk 308: PRIVATE int stream_pipe (HTStream * me)
1.56 frystyk 309: {
1.123 ! frystyk 310: HTRequest * req = me->request;
! 311: HTNet * net = req->net;
! 312: HTHost * host = HTNet_host(net);
1.80 frystyk 313: if (me->target) {
314: int status = PUTBLOCK(me->buffer, me->buflen);
315: if (status == HT_OK)
316: me->transparent = YES;
317: return status;
1.88 frystyk 318: } else if (HTRequest_isSource(req) && !req->output_stream) {
319: /*
320: ** We need to wait for the destinations to get ready
321: */
322: return HT_WOULD_BLOCK;
1.80 frystyk 323: }
1.88 frystyk 324:
1.81 frystyk 325: if (strncasecomp(me->buffer, "http/", 5)) {
1.80 frystyk 326: int status;
1.104 frystyk 327: HTRequest_addError(req, ERR_INFO, NO, HTERR_HTTP09,
1.80 frystyk 328: (void *) me->buffer, me->buflen, "HTTPStatusStream");
1.105 frystyk 329: me->target = HTStreamStack(WWW_UNKNOWN, req->output_format,
330: req->output_stream, req, NO);
1.88 frystyk 331: me->http->next = HTTP_GOT_DATA;
1.80 frystyk 332: if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
333: me->transparent = YES;
1.123 ! frystyk 334: HTHost_setVersion(host, HTTP_09);
1.80 frystyk 335: return status;
336: } else {
1.81 frystyk 337: char *ptr = me->buffer+5; /* Skip the HTTP part */
338: me->version = HTNextField(&ptr);
1.95 frystyk 339:
340: /* here we want to find out when to use persistent connection */
1.123 ! frystyk 341: HTHost_setVersion(host, HTTP_10);
1.95 frystyk 342:
1.81 frystyk 343: me->status = atoi(HTNextField(&ptr));
344: me->reason = ptr;
345: if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
346: *ptr = '0円';
347: else if ((ptr = strchr(me->reason, '\n')) != NULL)
348: *ptr = '0円';
349:
350: /* Set up the streams */
1.112 frystyk 351: if (me->status==200) {
1.80 frystyk 352: HTStream *s;
1.103 frystyk 353: me->target = HTStreamStack(WWW_MIME, req->output_format,
354: req->output_stream, req, NO);
1.80 frystyk 355:
1.103 frystyk 356: /* howcome: test for return value from HTCacheWriter 12/1/95 */
357: if (req->method==METHOD_GET && HTCache_isEnabled() &&
358: (s = HTCacheWriter(req, NULL, WWW_MIME, req->output_format,
359: req->output_stream))) {
1.113 frystyk 360: me->target = HTTee(me->target, s, NULL);
1.103 frystyk 361: }
1.94 frystyk 362: } else if (req->debug_stream) {
363: me->target = HTStreamStack(WWW_MIME, req->debug_format,
364: req->debug_stream, req, NO);
1.71 frystyk 365: } else {
1.103 frystyk 366: /* We still need to parser the MIME part */
1.114 frystyk 367: me->target = HTStreamStack(WWW_MIME, req->debug_format,
368: req->debug_stream, req, NO);
1.56 frystyk 369: }
370: }
1.113 frystyk 371: if (!me->target) me->target = HTErrorStream();
1.81 frystyk 372: HTTPNextState(me); /* Get next state */
1.80 frystyk 373: me->transparent = YES;
374: return HT_OK;
1.71 frystyk 375: }
1.56 frystyk 376:
1.80 frystyk 377: /*
378: ** Searches for HTTP header line until buffer fills up or a CRLF or LF
379: ** is found
380: */
1.119 frystyk 381: PRIVATE int HTTPStatus_put_block (HTStream * me, const char * b, int l)
1.71 frystyk 382: {
1.80 frystyk 383: while (!me->transparent && l-- > 0) {
384: int status;
385: if (me->target) {
386: if ((status = stream_pipe(me)) != HT_OK)
387: return status;
388: } else {
389: *(me->buffer+me->buflen++) = *b;
390: if (me->state == EOL_FCR) {
391: if (*b == LF) { /* Line found */
392: if ((status = stream_pipe(me)) != HT_OK)
393: return status;
394: } else {
395: me->state = EOL_BEGIN;
396: }
397: } else if (*b == CR) {
398: me->state = EOL_FCR;
399: } else if (*b == LF) {
400: if ((status = stream_pipe(me)) != HT_OK)
401: return status;
1.71 frystyk 402: } else {
1.80 frystyk 403: if (me->buflen >= MAX_STATUS_LEN) {
404: if ((status = stream_pipe(me)) != HT_OK)
405: return status;
406: }
1.71 frystyk 407: }
1.80 frystyk 408: b++;
1.71 frystyk 409: }
1.56 frystyk 410: }
1.99 frystyk 411: if (l > 0) return PUTBLOCK(b, l);
412: return HT_OK;
1.56 frystyk 413: }
414:
1.119 frystyk 415: PRIVATE int HTTPStatus_put_string (HTStream * me, const char * s)
1.71 frystyk 416: {
1.80 frystyk 417: return HTTPStatus_put_block(me, s, (int) strlen(s));
1.71 frystyk 418: }
1.56 frystyk 419:
1.100 frystyk 420: PRIVATE int HTTPStatus_put_character (HTStream * me, char c)
1.71 frystyk 421: {
1.80 frystyk 422: return HTTPStatus_put_block(me, &c, 1);
423: }
424:
1.100 frystyk 425: PRIVATE int HTTPStatus_flush (HTStream * me)
1.80 frystyk 426: {
427: return (*me->target->isa->flush)(me->target);
1.71 frystyk 428: }
429:
1.100 frystyk 430: PRIVATE int HTTPStatus_free (HTStream * me)
1.71 frystyk 431: {
1.87 frystyk 432: int status = HT_OK;
433: if (me->target) {
434: if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
435: return HT_WOULD_BLOCK;
436: }
1.115 frystyk 437: HT_FREE(me);
1.100 frystyk 438: return status;
1.71 frystyk 439: }
440:
1.104 frystyk 441: PRIVATE int HTTPStatus_abort (HTStream * me, HTList * e)
1.71 frystyk 442: {
443: if (me->target)
1.74 frystyk 444: ABORT_TARGET;
1.115 frystyk 445: HT_FREE(me);
1.74 frystyk 446: if (PROT_TRACE)
1.116 eric 447: HTTrace("HTTPStatus.. ABORTING...\n");
1.80 frystyk 448: return HT_ERROR;
1.71 frystyk 449: }
450:
451: /* HTTPStatus Stream
452: ** -----------------
453: */
1.119 frystyk 454: PRIVATE const HTStreamClass HTTPStatusClass =
1.71 frystyk 455: {
456: "HTTPStatus",
1.80 frystyk 457: HTTPStatus_flush,
1.71 frystyk 458: HTTPStatus_free,
459: HTTPStatus_abort,
460: HTTPStatus_put_character,
461: HTTPStatus_put_string,
462: HTTPStatus_put_block
463: };
464:
1.113 frystyk 465: #if 0
1.100 frystyk 466: PRIVATE HTStream * HTTPStatus_new (HTRequest * request, http_info * http)
1.113 frystyk 467: #endif
468:
469: PUBLIC HTStream * HTTPStatus_new (HTRequest * request,
470: void * param,
471: HTFormat input_format,
472: HTFormat output_format,
473: HTStream * output_stream)
1.71 frystyk 474: {
1.115 frystyk 475: HTStream * me;
476: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
477: HT_OUTOFMEM("HTTPStatus_new");
1.71 frystyk 478: me->isa = &HTTPStatusClass;
1.113 frystyk 479: if (request) {
480: HTNet * net = request->net;
481: http_info * http = (http_info *) net->context; /* Get existing copy */
482: me->request = request;
483: me->http = http;
484: http->next = HTTP_ERROR;
485: me->state = EOL_BEGIN;
486: return me;
487: } else
488: return HTErrorStream();
1.71 frystyk 489: }
490:
491: /* ------------------------------------------------------------------------- */
492:
493: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 494: ** ==============================
495: **
496: ** Given a hypertext address, this routine loads a document.
497: **
498: ** On entry,
499: ** request This is the request structure
1.94 frystyk 500: ** returns HT_ERROR Error has occured in call back
501: ** HT_OK Call back was OK
1.55 frystyk 502: */
1.94 frystyk 503: PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request, SockOps ops)
1.55 frystyk 504: {
1.71 frystyk 505: int status = HT_ERROR;
1.94 frystyk 506: HTNet *net = request->net; /* Generic protocol information */
1.55 frystyk 507: http_info *http; /* Specific protocol information */
1.112 frystyk 508: HTParentAnchor *anchor = HTRequest_anchor(request);
509:
1.94 frystyk 510: /*
511: ** Initiate a new http structure and bind to request structure
512: ** This is actually state HTTP_BEGIN, but it can't be in the state
513: ** machine as we need the structure first.
514: */
515: if (ops == FD_NONE) {
1.116 eric 516: if (PROT_TRACE) HTTrace("HTTP........ Looking for `%s\'\n",
1.112 frystyk 517: HTAnchor_physical(anchor));
1.115 frystyk 518: if ((http = (http_info *) HT_CALLOC(1, sizeof(http_info))) == NULL)
519: HT_OUTOFMEM("HTLoadHTTP");
1.71 frystyk 520: http->state = HTTP_BEGIN;
1.113 frystyk 521: http->next = HTTP_GOT_DATA;
1.94 frystyk 522: net->context = http;
1.98 frystyk 523: } else if (ops == FD_CLOSE) { /* Interrupted */
1.112 frystyk 524: HTRequest_addError(request, ERR_FATAL, NO, HTERR_INTERRUPTED,
525: NULL, 0, "HTLoadHTTP");
526: HTTPCleanup(request, HT_INTERRUPTED);
1.94 frystyk 527: return HT_OK;
528: } else
529: http = (http_info *) net->context; /* Get existing copy */
1.71 frystyk 530:
531: /* Now jump into the machine. We know the state from the previous run */
532: while (1) {
533: switch (http->state) {
534: case HTTP_BEGIN:
535: /*
536: ** Compose authorization information (this was moved here
537: ** from after the making of the connection so that the connection
538: ** wouldn't have to wait while prompting username and password
539: ** from the user). -- AL 13.10.93
540: */
1.117 frystyk 541: if (HTAuth_generate(request)) {
542: if (PROT_TRACE)HTTrace("HTTP........ Credentials generated\n");
543: http->state = HTTP_NEED_CONNECTION;
544: } else {
545: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
546: NULL, 0, "HTLoadHTTP");
547: http->state = HTTP_ERROR;
1.71 frystyk 548: }
549: break;
550:
1.123 ! frystyk 551: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
! 552: status = HTDoConnect(net, HTAnchor_physical(anchor), HTTP_PORT);
1.80 frystyk 553: if (status == HT_OK) {
1.123 ! frystyk 554: /*
! 555: ** Check the protocol class to see if we have connected to a
! 556: ** the right class of server, in this case HTTP.
! 557: */
! 558: {
! 559: HTHost * host = HTNet_host(net);
! 560: char * s_class = HTHost_class(host);
! 561: if (s_class && strcasecomp(s_class, "http")) {
! 562: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
! 563: NULL, 0, "HTLoadHTTP");
! 564: http->state = HTTP_ERROR;
! 565: break;
! 566: }
! 567: HTHost_setClass(host, "http");
1.95 frystyk 568: }
569:
1.123 ! frystyk 570: /*
! 571: ** Create the stream pipe FROM the channel to the application.
! 572: ** The target for the input stream pipe is set up using the
! 573: ** stream stack.
1.113 frystyk 574: */
1.123 ! frystyk 575: HTNet_getInput(net, HTStreamStack(WWW_HTTP,
! 576: request->output_format,
! 577: request->output_stream,
! 578: request, YES), NULL, 0);
! 579: /*
! 580: ** Create the stream pipe TO the channel from the application
! 581: ** and hook it up to the request object
! 582: */
! 583: {
! 584: HTOutputStream * output = HTNet_getOutput(net, NULL, 0);
! 585: HTStream * app = HTMethod_hasEntity(request->method) ?
! 586: HTMIMERequest_new(request,
! 587: HTTPRequest_new(request,(HTStream*) output,NO),YES) :
! 588: HTTPRequest_new(request, (HTStream*) output, YES);
! 589: HTRequest_setInputStream(request, app);
! 590: }
1.88 frystyk 591:
592: /*
593: ** Set up concurrent read/write if this request isn't the
594: ** source for a PUT or POST. As source we don't start reading
595: ** before all destinations are ready. If destination then
596: ** register the input stream and get ready for read
597: */
1.112 frystyk 598: if (HTRequest_isDestination(request)) {
1.94 frystyk 599: HTEvent_Register(net->sockfd, request, (SockOps) FD_READ,
600: HTLoadHTTP, net->priority);
1.88 frystyk 601: HTRequest_linkDestination(request);
602: }
1.71 frystyk 603: http->state = HTTP_NEED_REQUEST;
1.96 frystyk 604: } else if (status == HT_WOULD_BLOCK || status == HT_PERSISTENT)
1.94 frystyk 605: return HT_OK;
1.71 frystyk 606: else
607: http->state = HTTP_ERROR; /* Error or interrupt */
608: break;
609:
1.87 frystyk 610: /* As we can do simultanous read and write this is now one state */
1.80 frystyk 611: case HTTP_NEED_REQUEST:
1.94 frystyk 612: if (ops == FD_WRITE || ops == FD_NONE) {
1.88 frystyk 613: if (HTRequest_isDestination(request)) {
1.94 frystyk 614: HTNet *srcnet = request->source->net;
1.112 frystyk 615: if (srcnet) {
616: HTEvent_Register(srcnet->sockfd, request->source,
617: (SockOps) FD_READ,
618: srcnet->cbf, srcnet->priority);
619: HTEvent_UnRegister(net->sockfd, FD_WRITE);
620: }
1.94 frystyk 621: return HT_OK;
1.80 frystyk 622: }
1.101 frystyk 623: status = request->PostCallback ?
624: request->PostCallback(request, request->input_stream) :
1.88 frystyk 625: (*request->input_stream->isa->flush)(request->input_stream);
1.71 frystyk 626: if (status == HT_WOULD_BLOCK)
1.94 frystyk 627: return HT_OK;
628: else
629: ops = FD_READ; /* Trick to ensure that we do READ */
630: } else if (ops == FD_READ) {
1.123 ! frystyk 631: status = (*net->input->isa->read)(net->input);
1.80 frystyk 632: if (status == HT_WOULD_BLOCK)
1.94 frystyk 633: return HT_OK;
1.113 frystyk 634: else if (status==HT_LOADED || status==HT_CLOSED)
1.94 frystyk 635: http->state = http->next; /* Jump to next state */
636: else
637: http->state = HTTP_ERROR;
1.90 frystyk 638: } else {
1.78 frystyk 639: http->state = HTTP_ERROR;
1.90 frystyk 640: }
1.71 frystyk 641: break;
1.80 frystyk 642:
1.91 frystyk 643: case HTTP_NOT_MODIFIED:
644: http->state = HTTP_ERROR;
645: break;
646:
1.112 frystyk 647: case HTTP_PERM_REDIRECT:
648: if (HTRequest_isPostWeb(request)) {
649: if (HTRequest_isDestination(request)) {
650: HTLink *link =
651: HTAnchor_findLink((HTAnchor *) request->source->anchor,
652: (HTAnchor *) anchor);
653: HTLink_setResult(link, HT_LINK_ERROR);
654: }
1.88 frystyk 655: HTRequest_killPostWeb(request);
1.112 frystyk 656: }
657: HTTPCleanup(request, HT_PERM_REDIRECT);
658: return HT_OK;
659: break;
660:
1.88 frystyk 661:
1.112 frystyk 662: case HTTP_TEMP_REDIRECT:
663: if (HTRequest_isPostWeb(request)) {
664: if (HTRequest_isDestination(request)) {
665: HTLink *link =
666: HTAnchor_findLink((HTAnchor *) request->source->anchor,
667: (HTAnchor *) anchor);
668: HTLink_setResult(link, HT_LINK_ERROR);
1.58 frystyk 669: }
1.112 frystyk 670: HTRequest_killPostWeb(request);
1.71 frystyk 671: }
1.112 frystyk 672: HTTPCleanup(request, HT_TEMP_REDIRECT);
673: return HT_OK;
1.71 frystyk 674: break;
1.112 frystyk 675:
1.71 frystyk 676: case HTTP_AA:
1.112 frystyk 677: if (HTRequest_isPostWeb(request)) {
678: if (HTRequest_isDestination(request)) {
679: HTLink *link =
680: HTAnchor_findLink((HTAnchor *) request->source->anchor,
681: (HTAnchor *) anchor);
682: HTLink_setResult(link, HT_LINK_ERROR);
683: }
1.88 frystyk 684: HTRequest_killPostWeb(request);
1.71 frystyk 685: }
1.112 frystyk 686: HTTPCleanup(request, HT_NO_ACCESS);
687: return HT_OK;
1.71 frystyk 688: break;
1.112 frystyk 689:
1.71 frystyk 690: case HTTP_GOT_DATA:
1.88 frystyk 691: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 692: if (HTRequest_isDestination(request)) {
693: HTLink *link =
694: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 695: (HTAnchor *) anchor);
1.109 frystyk 696: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 697: }
1.112 frystyk 698: }
699: HTTPCleanup(request, HT_LOADED);
1.94 frystyk 700: return HT_OK;
1.71 frystyk 701: break;
702:
703: case HTTP_NO_DATA:
1.88 frystyk 704: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 705: if (HTRequest_isDestination(request)) {
706: HTLink *link =
707: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 708: (HTAnchor *) anchor);
1.109 frystyk 709: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 710: }
1.112 frystyk 711: }
712: HTTPCleanup(request, HT_NO_DATA);
1.94 frystyk 713: return HT_OK;
1.71 frystyk 714: break;
1.80 frystyk 715:
1.94 frystyk 716: case HTTP_RETRY:
1.88 frystyk 717: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 718: if (HTRequest_isDestination(request)) {
719: HTLink *link =
720: HTAnchor_findLink((HTAnchor*) request->source->anchor,
1.112 frystyk 721: (HTAnchor*) anchor);
1.109 frystyk 722: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 723: }
1.112 frystyk 724: HTRequest_killPostWeb(request);
725: }
726: HTTPCleanup(request, HT_RETRY);
1.94 frystyk 727: return HT_OK;
1.81 frystyk 728: break;
729:
1.71 frystyk 730: case HTTP_ERROR:
1.88 frystyk 731: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 732: if (HTRequest_isDestination(request)) {
733: HTLink *link =
734: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 735: (HTAnchor *) anchor);
1.109 frystyk 736: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 737: }
1.112 frystyk 738: HTRequest_killPostWeb(request);
739: }
1.120 eric 740: HTTPCleanup(request, status);
1.94 frystyk 741: return HT_OK;
1.71 frystyk 742: break;
743: }
744: } /* End of while(1) */
745: }
1.88 frystyk 746:
1.21 luotonen 747:
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