Annotation of libwww/Library/src/HTTP.c, revision 1.128
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.
1.128 ! frystyk 6: ** @(#) $Id: HTTP.c,v 1.127 1996年07月02日 22:55:11 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"
1.125 frystyk 26: #include "WWWTrans.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: {
1.126 frystyk 98: HTNet * net = HTRequest_net(req);
99: http_info * http = (http_info *) HTNet_context(net);
100: HTStream * input = HTRequest_inputStream(req);
1.80 frystyk 101:
1.94 frystyk 102: /* Free stream with data TO network */
1.112 frystyk 103: if (HTRequest_isDestination(req))
104: HTRequest_removeDestination(req);
1.126 frystyk 105: else if (input) {
1.94 frystyk 106: if (status == HT_INTERRUPTED)
1.126 frystyk 107: (*input->isa->abort)(input, NULL);
1.94 frystyk 108: else
1.126 frystyk 109: (*input->isa->_free)(input);
110: HTRequest_setInputStream(req, NULL);
1.94 frystyk 111: }
1.88 frystyk 112:
1.94 frystyk 113: /* Remove the request object and our own context structure for http */
1.126 frystyk 114: HTNet_delete(net, HTRequest_internal(req) ? HT_IGNORE : status);
1.115 frystyk 115: HT_FREE(http);
1.94 frystyk 116: return YES;
1.55 frystyk 117: }
118:
1.71 frystyk 119: /*
120: ** This is a big switch handling all HTTP return codes. It puts in any
121: ** appropiate error message and decides whether we should expect data
1.78 frystyk 122: ** or not.
1.55 frystyk 123: */
1.100 frystyk 124: PRIVATE void HTTPNextState (HTStream * me)
1.55 frystyk 125: {
1.71 frystyk 126: switch (me->status) {
127:
1.127 frystyk 128: case 100:
129: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CONTINUE,
130: me->reason, (int) strlen(me->reason),
131: "HTTPNextState");
132: /* here we should restart the PUT operation */
133: break;
134:
135: case 101:
136: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_SWITCHING,
137: me->reason, (int) strlen(me->reason),
138: "HTTPNextState");
139: break;
140:
1.78 frystyk 141: case 0: /* 0.9 response */
1.127 frystyk 142: case 200: /* OK */
143: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_OK,
144: me->reason, (int) strlen(me->reason),
145: "HTTPNextState");
1.112 frystyk 146: me->http->next = HTTP_GOT_DATA;
147: break;
148:
1.127 frystyk 149: case 201: /* Created */
1.112 frystyk 150: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CREATED,
151: me->reason, (int) strlen(me->reason),
152: "HTTPNextState");
153: me->http->next = HTTP_GOT_DATA;
154: break;
155:
1.127 frystyk 156: case 202: /* Accepted */
1.112 frystyk 157: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_ACCEPTED,
158: me->reason, (int) strlen(me->reason),
159: "HTTPNextState");
160: me->http->next = HTTP_GOT_DATA;
161: break;
162:
1.127 frystyk 163: case 203: /* Non-authoritative information */
164: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NON_AUTHORITATIVE,
1.112 frystyk 165: me->reason, (int) strlen(me->reason),
166: "HTTPNextState");
1.81 frystyk 167: me->http->next = HTTP_GOT_DATA;
1.71 frystyk 168: break;
1.78 frystyk 169:
170: case 204: /* No Response */
1.112 frystyk 171: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NO_CONTENT,
172: me->reason, (int) strlen(me->reason),
173: "HTTPNextState");
1.81 frystyk 174: me->http->next = HTTP_NO_DATA;
1.71 frystyk 175: break;
1.78 frystyk 176:
1.71 frystyk 177: case 301: /* Moved */
1.112 frystyk 178: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MOVED,
179: me->reason, (int) strlen(me->reason),
180: "HTTPNextState");
181: me->http->next = HTTP_PERM_REDIRECT;
182: break;
183:
1.71 frystyk 184: case 302: /* Found */
1.112 frystyk 185: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_FOUND,
186: me->reason, (int) strlen(me->reason),
187: "HTTPNextState");
188: me->http->next = HTTP_TEMP_REDIRECT;
1.71 frystyk 189: break;
1.55 frystyk 190:
1.71 frystyk 191: case 303: /* Method */
1.107 frystyk 192: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
193: me->reason, (int) strlen(me->reason),
194: "HTTPNextState");
1.81 frystyk 195: me->http->next = HTTP_ERROR;
1.71 frystyk 196: break;
1.91 frystyk 197:
198: case 304: /* Not Modified */
1.112 frystyk 199: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_MODIFIED,
200: me->reason, (int) strlen(me->reason),
201: "HTTPNextState");
1.91 frystyk 202: me->http->next = HTTP_NOT_MODIFIED;
203: break;
1.55 frystyk 204:
1.78 frystyk 205: case 400: /* Bad Request */
1.104 frystyk 206: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
1.100 frystyk 207: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 208: me->http->next = HTTP_ERROR;
1.71 frystyk 209: break;
1.70 howcome 210:
1.71 frystyk 211: case 401:
1.104 frystyk 212: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.100 frystyk 213: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 214: me->http->next = HTTP_AA;
1.71 frystyk 215: break;
216:
217: case 402: /* Payment required */
1.104 frystyk 218: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
1.100 frystyk 219: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 220: me->http->next = HTTP_ERROR;
1.71 frystyk 221: break;
1.55 frystyk 222:
1.71 frystyk 223: case 403: /* Forbidden */
1.104 frystyk 224: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
1.100 frystyk 225: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 226: me->http->next = HTTP_ERROR;
1.71 frystyk 227: break;
1.55 frystyk 228:
1.71 frystyk 229: case 404: /* Not Found */
1.104 frystyk 230: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
1.100 frystyk 231: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 232: me->http->next = HTTP_ERROR;
1.71 frystyk 233: break;
234:
1.78 frystyk 235: case 405: /* Not Allowed */
1.104 frystyk 236: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
1.100 frystyk 237: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 238: me->http->next = HTTP_ERROR;
1.78 frystyk 239: break;
240:
241: case 406: /* None Acceptable */
1.104 frystyk 242: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
1.100 frystyk 243: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 244: me->http->next = HTTP_ERROR;
1.78 frystyk 245: break;
246:
247: case 407: /* Proxy Authentication Required */
1.127 frystyk 248: HTRequest_addError(me->request, ERR_FATAL, NO,HTERR_PROXY_UNAUTHORIZED,
1.100 frystyk 249: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 250: me->http->next = HTTP_ERROR;
1.78 frystyk 251: break;
252:
253: case 408: /* Request Timeout */
1.104 frystyk 254: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
1.100 frystyk 255: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 256: me->http->next = HTTP_ERROR;
1.78 frystyk 257: break;
258:
1.71 frystyk 259: case 500:
1.104 frystyk 260: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
1.100 frystyk 261: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 262: me->http->next = HTTP_ERROR;
1.78 frystyk 263: break;
264:
1.71 frystyk 265: case 501:
1.104 frystyk 266: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
1.100 frystyk 267: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 268: me->http->next = HTTP_ERROR;
1.78 frystyk 269: break;
270:
271: case 502:
1.104 frystyk 272: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
1.100 frystyk 273: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 274: me->http->next = HTTP_ERROR;
1.78 frystyk 275: break;
276:
277: case 503:
1.104 frystyk 278: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_DOWN,
1.100 frystyk 279: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 280:
281: /* If Retry-After header is found then return HT_RETRY else HT_ERROR */
1.126 frystyk 282: if (HTRequest_retryTime(me->request))
1.81 frystyk 283: me->http->next = HTTP_RETRY;
284: else
285: me->http->next = HTTP_ERROR;
1.78 frystyk 286: break;
287:
288: case 504:
1.104 frystyk 289: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
1.100 frystyk 290: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 291: me->http->next = HTTP_ERROR;
1.71 frystyk 292: break;
1.78 frystyk 293:
1.71 frystyk 294: default: /* bad number */
1.104 frystyk 295: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.100 frystyk 296: (void *) me->buffer, me->buflen, "HTTPNextState");
1.81 frystyk 297: me->http->next = HTTP_ERROR;
1.71 frystyk 298: break;
1.55 frystyk 299: }
300: }
301:
1.71 frystyk 302: /* ------------------------------------------------------------------------- */
303: /* HTTP Status Line Stream */
304: /* ------------------------------------------------------------------------- */
1.55 frystyk 305:
1.71 frystyk 306: /*
1.80 frystyk 307: ** Analyse the stream we have read. If it is a HTTP 1.0 or higher
1.71 frystyk 308: ** then create a MIME-stream, else create a Guess stream to find out
309: ** what the 0.9 server is sending. We need to copy the buffer as we don't
310: ** know if we can modify the contents or not.
1.78 frystyk 311: **
312: ** Stream handling is a function of the status code returned from the
313: ** server:
314: ** 200: Use `output_stream' in HTRequest structure
1.94 frystyk 315: ** else: Use `debug_stream' in HTRequest structure
1.80 frystyk 316: **
317: ** Return: YES if buffer should be written out. NO otherwise
1.56 frystyk 318: */
1.100 frystyk 319: PRIVATE int stream_pipe (HTStream * me)
1.56 frystyk 320: {
1.123 frystyk 321: HTRequest * req = me->request;
322: HTNet * net = req->net;
323: HTHost * host = HTNet_host(net);
1.80 frystyk 324: if (me->target) {
325: int status = PUTBLOCK(me->buffer, me->buflen);
326: if (status == HT_OK)
327: me->transparent = YES;
328: return status;
1.88 frystyk 329: } else if (HTRequest_isSource(req) && !req->output_stream) {
330: /*
331: ** We need to wait for the destinations to get ready
332: */
333: return HT_WOULD_BLOCK;
1.80 frystyk 334: }
1.88 frystyk 335:
1.81 frystyk 336: if (strncasecomp(me->buffer, "http/", 5)) {
1.80 frystyk 337: int status;
1.104 frystyk 338: HTRequest_addError(req, ERR_INFO, NO, HTERR_HTTP09,
1.80 frystyk 339: (void *) me->buffer, me->buflen, "HTTPStatusStream");
1.105 frystyk 340: me->target = HTStreamStack(WWW_UNKNOWN, req->output_format,
341: req->output_stream, req, NO);
1.88 frystyk 342: me->http->next = HTTP_GOT_DATA;
1.80 frystyk 343: if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
344: me->transparent = YES;
1.123 frystyk 345: HTHost_setVersion(host, HTTP_09);
1.80 frystyk 346: return status;
347: } else {
1.81 frystyk 348: char *ptr = me->buffer+5; /* Skip the HTTP part */
349: me->version = HTNextField(&ptr);
1.95 frystyk 350:
351: /* here we want to find out when to use persistent connection */
1.128 ! frystyk 352: if (!strncasecomp(me->version, "1.0", 3)) {
! 353: if (PROT_TRACE)HTTrace("HTTP Status. This is a HTTP/1.0 server\n");
! 354: HTHost_setVersion(host, HTTP_10);
! 355: } else {
! 356: HTHost_setVersion(host, HTTP_11);
! 357: HTNet_setPersistent(net, YES); /* By default */
! 358: }
1.95 frystyk 359:
1.81 frystyk 360: me->status = atoi(HTNextField(&ptr));
361: me->reason = ptr;
362: if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
363: *ptr = '0円';
364: else if ((ptr = strchr(me->reason, '\n')) != NULL)
365: *ptr = '0円';
366:
367: /* Set up the streams */
1.112 frystyk 368: if (me->status==200) {
1.80 frystyk 369: HTStream *s;
1.103 frystyk 370: me->target = HTStreamStack(WWW_MIME, req->output_format,
371: req->output_stream, req, NO);
1.80 frystyk 372:
1.103 frystyk 373: /* howcome: test for return value from HTCacheWriter 12/1/95 */
374: if (req->method==METHOD_GET && HTCache_isEnabled() &&
375: (s = HTCacheWriter(req, NULL, WWW_MIME, req->output_format,
376: req->output_stream))) {
1.113 frystyk 377: me->target = HTTee(me->target, s, NULL);
1.103 frystyk 378: }
1.94 frystyk 379: } else if (req->debug_stream) {
380: me->target = HTStreamStack(WWW_MIME, req->debug_format,
381: req->debug_stream, req, NO);
1.71 frystyk 382: } else {
1.103 frystyk 383: /* We still need to parser the MIME part */
1.114 frystyk 384: me->target = HTStreamStack(WWW_MIME, req->debug_format,
385: req->debug_stream, req, NO);
1.56 frystyk 386: }
387: }
1.113 frystyk 388: if (!me->target) me->target = HTErrorStream();
1.81 frystyk 389: HTTPNextState(me); /* Get next state */
1.80 frystyk 390: me->transparent = YES;
391: return HT_OK;
1.71 frystyk 392: }
1.56 frystyk 393:
1.80 frystyk 394: /*
395: ** Searches for HTTP header line until buffer fills up or a CRLF or LF
396: ** is found
397: */
1.119 frystyk 398: PRIVATE int HTTPStatus_put_block (HTStream * me, const char * b, int l)
1.71 frystyk 399: {
1.80 frystyk 400: while (!me->transparent && l-- > 0) {
401: int status;
402: if (me->target) {
403: if ((status = stream_pipe(me)) != HT_OK)
404: return status;
405: } else {
406: *(me->buffer+me->buflen++) = *b;
407: if (me->state == EOL_FCR) {
408: if (*b == LF) { /* Line found */
409: if ((status = stream_pipe(me)) != HT_OK)
410: return status;
411: } else {
412: me->state = EOL_BEGIN;
413: }
414: } else if (*b == CR) {
415: me->state = EOL_FCR;
416: } else if (*b == LF) {
417: if ((status = stream_pipe(me)) != HT_OK)
418: return status;
1.71 frystyk 419: } else {
1.80 frystyk 420: if (me->buflen >= MAX_STATUS_LEN) {
421: if ((status = stream_pipe(me)) != HT_OK)
422: return status;
423: }
1.71 frystyk 424: }
1.80 frystyk 425: b++;
1.71 frystyk 426: }
1.56 frystyk 427: }
1.99 frystyk 428: if (l > 0) return PUTBLOCK(b, l);
429: return HT_OK;
1.56 frystyk 430: }
431:
1.119 frystyk 432: PRIVATE int HTTPStatus_put_string (HTStream * me, const char * s)
1.71 frystyk 433: {
1.80 frystyk 434: return HTTPStatus_put_block(me, s, (int) strlen(s));
1.71 frystyk 435: }
1.56 frystyk 436:
1.100 frystyk 437: PRIVATE int HTTPStatus_put_character (HTStream * me, char c)
1.71 frystyk 438: {
1.80 frystyk 439: return HTTPStatus_put_block(me, &c, 1);
440: }
441:
1.100 frystyk 442: PRIVATE int HTTPStatus_flush (HTStream * me)
1.80 frystyk 443: {
444: return (*me->target->isa->flush)(me->target);
1.71 frystyk 445: }
446:
1.100 frystyk 447: PRIVATE int HTTPStatus_free (HTStream * me)
1.71 frystyk 448: {
1.87 frystyk 449: int status = HT_OK;
450: if (me->target) {
451: if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
452: return HT_WOULD_BLOCK;
453: }
1.115 frystyk 454: HT_FREE(me);
1.100 frystyk 455: return status;
1.71 frystyk 456: }
457:
1.104 frystyk 458: PRIVATE int HTTPStatus_abort (HTStream * me, HTList * e)
1.71 frystyk 459: {
460: if (me->target)
1.74 frystyk 461: ABORT_TARGET;
1.115 frystyk 462: HT_FREE(me);
1.74 frystyk 463: if (PROT_TRACE)
1.116 eric 464: HTTrace("HTTPStatus.. ABORTING...\n");
1.80 frystyk 465: return HT_ERROR;
1.71 frystyk 466: }
467:
468: /* HTTPStatus Stream
469: ** -----------------
470: */
1.119 frystyk 471: PRIVATE const HTStreamClass HTTPStatusClass =
1.71 frystyk 472: {
473: "HTTPStatus",
1.80 frystyk 474: HTTPStatus_flush,
1.71 frystyk 475: HTTPStatus_free,
476: HTTPStatus_abort,
477: HTTPStatus_put_character,
478: HTTPStatus_put_string,
479: HTTPStatus_put_block
480: };
481:
1.113 frystyk 482: #if 0
1.100 frystyk 483: PRIVATE HTStream * HTTPStatus_new (HTRequest * request, http_info * http)
1.113 frystyk 484: #endif
485:
486: PUBLIC HTStream * HTTPStatus_new (HTRequest * request,
487: void * param,
488: HTFormat input_format,
489: HTFormat output_format,
490: HTStream * output_stream)
1.71 frystyk 491: {
1.115 frystyk 492: HTStream * me;
493: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
494: HT_OUTOFMEM("HTTPStatus_new");
1.71 frystyk 495: me->isa = &HTTPStatusClass;
1.113 frystyk 496: if (request) {
1.126 frystyk 497: HTNet * net = HTRequest_net(request);
1.125 frystyk 498: /* Get existing copy */
499: http_info * http = (http_info *) HTNet_context(net);
1.113 frystyk 500: me->request = request;
501: me->http = http;
502: http->next = HTTP_ERROR;
503: me->state = EOL_BEGIN;
504: return me;
505: } else
506: return HTErrorStream();
1.71 frystyk 507: }
508:
509: /* ------------------------------------------------------------------------- */
510:
511: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 512: ** ==============================
513: **
514: ** Given a hypertext address, this routine loads a document.
515: **
516: ** On entry,
517: ** request This is the request structure
1.94 frystyk 518: ** returns HT_ERROR Error has occured in call back
519: ** HT_OK Call back was OK
1.55 frystyk 520: */
1.94 frystyk 521: PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request, SockOps ops)
1.55 frystyk 522: {
1.71 frystyk 523: int status = HT_ERROR;
1.126 frystyk 524: HTNet * net = HTRequest_net(request); /* Generic protocol information */
1.55 frystyk 525: http_info *http; /* Specific protocol information */
1.112 frystyk 526: HTParentAnchor *anchor = HTRequest_anchor(request);
527:
1.94 frystyk 528: /*
529: ** Initiate a new http structure and bind to request structure
530: ** This is actually state HTTP_BEGIN, but it can't be in the state
531: ** machine as we need the structure first.
532: */
533: if (ops == FD_NONE) {
1.116 eric 534: if (PROT_TRACE) HTTrace("HTTP........ Looking for `%s\'\n",
1.112 frystyk 535: HTAnchor_physical(anchor));
1.115 frystyk 536: if ((http = (http_info *) HT_CALLOC(1, sizeof(http_info))) == NULL)
537: HT_OUTOFMEM("HTLoadHTTP");
1.71 frystyk 538: http->state = HTTP_BEGIN;
1.113 frystyk 539: http->next = HTTP_GOT_DATA;
1.125 frystyk 540: HTNet_setContext(net, http);
1.98 frystyk 541: } else if (ops == FD_CLOSE) { /* Interrupted */
1.112 frystyk 542: HTRequest_addError(request, ERR_FATAL, NO, HTERR_INTERRUPTED,
543: NULL, 0, "HTLoadHTTP");
544: HTTPCleanup(request, HT_INTERRUPTED);
1.94 frystyk 545: return HT_OK;
546: } else
1.125 frystyk 547: http = (http_info *) HTNet_context(net); /* Get existing copy */
1.71 frystyk 548:
549: /* Now jump into the machine. We know the state from the previous run */
550: while (1) {
551: switch (http->state) {
552: case HTTP_BEGIN:
553: /*
554: ** Compose authorization information (this was moved here
555: ** from after the making of the connection so that the connection
556: ** wouldn't have to wait while prompting username and password
557: ** from the user). -- AL 13.10.93
558: */
1.117 frystyk 559: if (HTAuth_generate(request)) {
560: if (PROT_TRACE)HTTrace("HTTP........ Credentials generated\n");
561: http->state = HTTP_NEED_CONNECTION;
562: } else {
563: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
564: NULL, 0, "HTLoadHTTP");
565: http->state = HTTP_ERROR;
1.71 frystyk 566: }
567: break;
568:
1.123 frystyk 569: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
570: status = HTDoConnect(net, HTAnchor_physical(anchor), HTTP_PORT);
1.80 frystyk 571: if (status == HT_OK) {
1.123 frystyk 572: /*
573: ** Check the protocol class to see if we have connected to a
574: ** the right class of server, in this case HTTP.
575: */
576: {
577: HTHost * host = HTNet_host(net);
578: char * s_class = HTHost_class(host);
579: if (s_class && strcasecomp(s_class, "http")) {
580: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
581: NULL, 0, "HTLoadHTTP");
582: http->state = HTTP_ERROR;
583: break;
584: }
585: HTHost_setClass(host, "http");
1.95 frystyk 586: }
587:
1.123 frystyk 588: /*
589: ** Create the stream pipe FROM the channel to the application.
590: ** The target for the input stream pipe is set up using the
591: ** stream stack.
1.113 frystyk 592: */
1.126 frystyk 593: HTNet_getInput(net,
594: HTStreamStack(WWW_HTTP,
595: HTRequest_outputFormat(request),
596: HTRequest_outputStream(request),
597: request, YES), NULL, 0);
1.127 frystyk 598: HTRequest_setOutputConnected(request, YES);
599:
1.123 frystyk 600: /*
601: ** Create the stream pipe TO the channel from the application
602: ** and hook it up to the request object
603: */
604: {
605: HTOutputStream * output = HTNet_getOutput(net, NULL, 0);
1.126 frystyk 606: HTStream * app =
607: HTMethod_hasEntity(HTRequest_method(request)) ?
1.123 frystyk 608: HTMIMERequest_new(request,
609: HTTPRequest_new(request,(HTStream*) output,NO),YES) :
610: HTTPRequest_new(request, (HTStream*) output, YES);
611: HTRequest_setInputStream(request, app);
612: }
1.88 frystyk 613:
614: /*
615: ** Set up concurrent read/write if this request isn't the
616: ** source for a PUT or POST. As source we don't start reading
617: ** before all destinations are ready. If destination then
618: ** register the input stream and get ready for read
619: */
1.112 frystyk 620: if (HTRequest_isDestination(request)) {
1.124 eric 621: HTEvent_register(net->sockfd, request, (SockOps) FD_READ,
1.94 frystyk 622: HTLoadHTTP, net->priority);
1.88 frystyk 623: HTRequest_linkDestination(request);
624: }
1.71 frystyk 625: http->state = HTTP_NEED_REQUEST;
1.96 frystyk 626: } else if (status == HT_WOULD_BLOCK || status == HT_PERSISTENT)
1.94 frystyk 627: return HT_OK;
1.71 frystyk 628: else
629: http->state = HTTP_ERROR; /* Error or interrupt */
630: break;
631:
1.87 frystyk 632: /* As we can do simultanous read and write this is now one state */
1.80 frystyk 633: case HTTP_NEED_REQUEST:
1.94 frystyk 634: if (ops == FD_WRITE || ops == FD_NONE) {
1.88 frystyk 635: if (HTRequest_isDestination(request)) {
1.126 frystyk 636: HTRequest * source = HTRequest_source(request);
637: HTNet * srcnet = HTRequest_net(source);
1.112 frystyk 638: if (srcnet) {
1.126 frystyk 639: SOCKET sockfd = HTNet_socket(srcnet);
640: HTEvent_register(sockfd, source,
1.112 frystyk 641: (SockOps) FD_READ,
642: srcnet->cbf, srcnet->priority);
1.126 frystyk 643: HTEvent_unregister(sockfd, FD_WRITE);
1.112 frystyk 644: }
1.94 frystyk 645: return HT_OK;
1.80 frystyk 646: }
1.126 frystyk 647:
648: /*
649: ** Should we use the input stream directly or call the post
650: ** callback function to send data down to the network?
651: */
652: {
653: HTStream * input = HTRequest_inputStream(request);
654: HTPostCallback * pcbf = HTRequest_postCallback(request);
655: status = pcbf ? pcbf(request, input) :
656: (*input->isa->flush)(input);
657: if (status == HT_WOULD_BLOCK)
658: return HT_OK;
659: else
660: ops = FD_READ; /* Trick to ensure that we do READ */
661: }
1.94 frystyk 662: } else if (ops == FD_READ) {
1.123 frystyk 663: status = (*net->input->isa->read)(net->input);
1.80 frystyk 664: if (status == HT_WOULD_BLOCK)
1.94 frystyk 665: return HT_OK;
1.113 frystyk 666: else if (status==HT_LOADED || status==HT_CLOSED)
1.94 frystyk 667: http->state = http->next; /* Jump to next state */
668: else
669: http->state = HTTP_ERROR;
1.90 frystyk 670: } else {
1.78 frystyk 671: http->state = HTTP_ERROR;
1.90 frystyk 672: }
1.71 frystyk 673: break;
1.80 frystyk 674:
1.91 frystyk 675: case HTTP_NOT_MODIFIED:
676: http->state = HTTP_ERROR;
677: break;
678:
1.112 frystyk 679: case HTTP_PERM_REDIRECT:
680: if (HTRequest_isPostWeb(request)) {
681: if (HTRequest_isDestination(request)) {
1.126 frystyk 682: HTRequest * source = HTRequest_source(request);
683: HTLink * link =
1.127 frystyk 684: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 685: (HTAnchor *) anchor);
686: HTLink_setResult(link, HT_LINK_ERROR);
687: }
1.88 frystyk 688: HTRequest_killPostWeb(request);
1.112 frystyk 689: }
690: HTTPCleanup(request, HT_PERM_REDIRECT);
691: return HT_OK;
692: break;
693:
1.88 frystyk 694:
1.112 frystyk 695: case HTTP_TEMP_REDIRECT:
696: if (HTRequest_isPostWeb(request)) {
697: if (HTRequest_isDestination(request)) {
1.126 frystyk 698: HTRequest * source = HTRequest_source(request);
1.112 frystyk 699: HTLink *link =
1.127 frystyk 700: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 701: (HTAnchor *) anchor);
702: HTLink_setResult(link, HT_LINK_ERROR);
1.58 frystyk 703: }
1.112 frystyk 704: HTRequest_killPostWeb(request);
1.71 frystyk 705: }
1.112 frystyk 706: HTTPCleanup(request, HT_TEMP_REDIRECT);
707: return HT_OK;
1.71 frystyk 708: break;
1.112 frystyk 709:
1.71 frystyk 710: case HTTP_AA:
1.112 frystyk 711: if (HTRequest_isPostWeb(request)) {
712: if (HTRequest_isDestination(request)) {
1.126 frystyk 713: HTRequest * source = HTRequest_source(request);
1.112 frystyk 714: HTLink *link =
1.127 frystyk 715: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 716: (HTAnchor *) anchor);
717: HTLink_setResult(link, HT_LINK_ERROR);
718: }
1.88 frystyk 719: HTRequest_killPostWeb(request);
1.71 frystyk 720: }
1.112 frystyk 721: HTTPCleanup(request, HT_NO_ACCESS);
722: return HT_OK;
1.71 frystyk 723: break;
1.112 frystyk 724:
1.71 frystyk 725: case HTTP_GOT_DATA:
1.88 frystyk 726: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 727: if (HTRequest_isDestination(request)) {
1.126 frystyk 728: HTRequest * source = HTRequest_source(request);
1.91 frystyk 729: HTLink *link =
1.127 frystyk 730: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 731: (HTAnchor *) anchor);
1.109 frystyk 732: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 733: }
1.112 frystyk 734: }
735: HTTPCleanup(request, HT_LOADED);
1.94 frystyk 736: return HT_OK;
1.71 frystyk 737: break;
738:
739: case HTTP_NO_DATA:
1.88 frystyk 740: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 741: if (HTRequest_isDestination(request)) {
1.126 frystyk 742: HTRequest * source = HTRequest_source(request);
1.91 frystyk 743: HTLink *link =
1.127 frystyk 744: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 745: (HTAnchor *) anchor);
1.109 frystyk 746: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 747: }
1.112 frystyk 748: }
749: HTTPCleanup(request, HT_NO_DATA);
1.94 frystyk 750: return HT_OK;
1.71 frystyk 751: break;
1.80 frystyk 752:
1.94 frystyk 753: case HTTP_RETRY:
1.88 frystyk 754: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 755: if (HTRequest_isDestination(request)) {
1.126 frystyk 756: HTRequest * source = HTRequest_source(request);
1.91 frystyk 757: HTLink *link =
1.127 frystyk 758: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.126 frystyk 759: (HTAnchor *) anchor);
1.109 frystyk 760: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 761: }
1.112 frystyk 762: HTRequest_killPostWeb(request);
763: }
764: HTTPCleanup(request, HT_RETRY);
1.94 frystyk 765: return HT_OK;
1.81 frystyk 766: break;
767:
1.71 frystyk 768: case HTTP_ERROR:
1.88 frystyk 769: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 770: if (HTRequest_isDestination(request)) {
1.126 frystyk 771: HTRequest * source = HTRequest_source(request);
1.91 frystyk 772: HTLink *link =
1.127 frystyk 773: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 774: (HTAnchor *) anchor);
1.109 frystyk 775: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 776: }
1.112 frystyk 777: HTRequest_killPostWeb(request);
778: }
1.120 eric 779: HTTPCleanup(request, status);
1.94 frystyk 780: return HT_OK;
1.71 frystyk 781: break;
782: }
783: } /* End of while(1) */
784: }
1.88 frystyk 785:
1.21 luotonen 786:
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