Annotation of libwww/Library/src/HTTP.c, revision 1.125
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.
1.125 ! frystyk 6: ** @(#) $Id: HTTP.c,v 1.124 1996年05月15日 22:34:37 eric 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: {
1.94 frystyk 98: HTNet *net = req->net;
1.125 ! frystyk 99: http_info * http = (http_info *) HTNet_context(net);;
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:
1.94 frystyk 112: /* Remove the request object and our own context structure for http */
1.112 frystyk 113: HTNet_delete(net, req->internal ? HT_IGNORE : status);
1.115 frystyk 114: HT_FREE(http);
1.94 frystyk 115: return YES;
1.55 frystyk 116: }
117:
1.71 frystyk 118: /*
119: ** This is a big switch handling all HTTP return codes. It puts in any
120: ** appropiate error message and decides whether we should expect data
1.78 frystyk 121: ** or not.
1.55 frystyk 122: */
1.100 frystyk 123: PRIVATE void HTTPNextState (HTStream * me)
1.55 frystyk 124: {
1.71 frystyk 125: switch (me->status) {
126:
1.78 frystyk 127: case 0: /* 0.9 response */
128: case 200:
1.112 frystyk 129: me->http->next = HTTP_GOT_DATA;
130: break;
131:
1.78 frystyk 132: case 201:
1.112 frystyk 133: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CREATED,
134: me->reason, (int) strlen(me->reason),
135: "HTTPNextState");
136: me->http->next = HTTP_GOT_DATA;
137: break;
138:
1.78 frystyk 139: case 202:
1.112 frystyk 140: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_ACCEPTED,
141: me->reason, (int) strlen(me->reason),
142: "HTTPNextState");
143: me->http->next = HTTP_GOT_DATA;
144: break;
145:
1.78 frystyk 146: case 203:
1.112 frystyk 147: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PARTIAL,
148: me->reason, (int) strlen(me->reason),
149: "HTTPNextState");
1.81 frystyk 150: me->http->next = HTTP_GOT_DATA;
1.71 frystyk 151: break;
1.78 frystyk 152:
153: case 204: /* No Response */
1.112 frystyk 154: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NO_CONTENT,
155: me->reason, (int) strlen(me->reason),
156: "HTTPNextState");
1.81 frystyk 157: me->http->next = HTTP_NO_DATA;
1.71 frystyk 158: break;
1.78 frystyk 159:
1.71 frystyk 160: case 301: /* Moved */
1.112 frystyk 161: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MOVED,
162: me->reason, (int) strlen(me->reason),
163: "HTTPNextState");
164: me->http->next = HTTP_PERM_REDIRECT;
165: break;
166:
1.71 frystyk 167: case 302: /* Found */
1.112 frystyk 168: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_FOUND,
169: me->reason, (int) strlen(me->reason),
170: "HTTPNextState");
171: me->http->next = HTTP_TEMP_REDIRECT;
1.71 frystyk 172: break;
1.55 frystyk 173:
1.71 frystyk 174: case 303: /* Method */
1.107 frystyk 175: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
176: me->reason, (int) strlen(me->reason),
177: "HTTPNextState");
1.81 frystyk 178: me->http->next = HTTP_ERROR;
1.71 frystyk 179: break;
1.91 frystyk 180:
181: case 304: /* Not Modified */
1.112 frystyk 182: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_MODIFIED,
183: me->reason, (int) strlen(me->reason),
184: "HTTPNextState");
1.91 frystyk 185: me->http->next = HTTP_NOT_MODIFIED;
186: break;
1.55 frystyk 187:
1.78 frystyk 188: case 400: /* Bad Request */
1.104 frystyk 189: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
1.100 frystyk 190: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 191: me->http->next = HTTP_ERROR;
1.71 frystyk 192: break;
1.70 howcome 193:
1.71 frystyk 194: case 401:
1.104 frystyk 195: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.100 frystyk 196: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 197: me->http->next = HTTP_AA;
1.71 frystyk 198: break;
199:
200: case 402: /* Payment required */
1.104 frystyk 201: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
1.100 frystyk 202: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 203: me->http->next = HTTP_ERROR;
1.71 frystyk 204: break;
1.55 frystyk 205:
1.71 frystyk 206: case 403: /* Forbidden */
1.104 frystyk 207: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
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 404: /* Not Found */
1.104 frystyk 213: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
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;
217:
1.78 frystyk 218: case 405: /* Not Allowed */
1.104 frystyk 219: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
1.100 frystyk 220: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 221: me->http->next = HTTP_ERROR;
1.78 frystyk 222: break;
223:
224: case 406: /* None Acceptable */
1.104 frystyk 225: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
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 407: /* Proxy Authentication Required */
1.104 frystyk 231: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PROXY,
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 408: /* Request Timeout */
1.104 frystyk 237: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
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:
1.71 frystyk 242: case 500:
1.104 frystyk 243: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
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 501:
1.104 frystyk 249: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
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:
254: case 502:
1.104 frystyk 255: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
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 503:
1.104 frystyk 261: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_DOWN,
1.100 frystyk 262: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 263:
264: /* If Retry-After header is found then return HT_RETRY else HT_ERROR */
265: if (me->request->retry_after)
266: me->http->next = HTTP_RETRY;
267: else
268: me->http->next = HTTP_ERROR;
1.78 frystyk 269: break;
270:
271: case 504:
1.104 frystyk 272: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
1.100 frystyk 273: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 274: me->http->next = HTTP_ERROR;
1.71 frystyk 275: break;
1.78 frystyk 276:
1.71 frystyk 277: default: /* bad number */
1.104 frystyk 278: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.100 frystyk 279: (void *) me->buffer, me->buflen, "HTTPNextState");
1.81 frystyk 280: me->http->next = HTTP_ERROR;
1.71 frystyk 281: break;
1.55 frystyk 282: }
283: }
284:
1.71 frystyk 285: /* ------------------------------------------------------------------------- */
286: /* HTTP Status Line Stream */
287: /* ------------------------------------------------------------------------- */
1.55 frystyk 288:
1.71 frystyk 289: /*
1.80 frystyk 290: ** Analyse the stream we have read. If it is a HTTP 1.0 or higher
1.71 frystyk 291: ** then create a MIME-stream, else create a Guess stream to find out
292: ** what the 0.9 server is sending. We need to copy the buffer as we don't
293: ** know if we can modify the contents or not.
1.78 frystyk 294: **
295: ** Stream handling is a function of the status code returned from the
296: ** server:
297: ** 200: Use `output_stream' in HTRequest structure
1.94 frystyk 298: ** else: Use `debug_stream' in HTRequest structure
1.80 frystyk 299: **
300: ** Return: YES if buffer should be written out. NO otherwise
1.56 frystyk 301: */
1.100 frystyk 302: PRIVATE int stream_pipe (HTStream * me)
1.56 frystyk 303: {
1.123 frystyk 304: HTRequest * req = me->request;
305: HTNet * net = req->net;
306: HTHost * host = HTNet_host(net);
1.80 frystyk 307: if (me->target) {
308: int status = PUTBLOCK(me->buffer, me->buflen);
309: if (status == HT_OK)
310: me->transparent = YES;
311: return status;
1.88 frystyk 312: } else if (HTRequest_isSource(req) && !req->output_stream) {
313: /*
314: ** We need to wait for the destinations to get ready
315: */
316: return HT_WOULD_BLOCK;
1.80 frystyk 317: }
1.88 frystyk 318:
1.81 frystyk 319: if (strncasecomp(me->buffer, "http/", 5)) {
1.80 frystyk 320: int status;
1.104 frystyk 321: HTRequest_addError(req, ERR_INFO, NO, HTERR_HTTP09,
1.80 frystyk 322: (void *) me->buffer, me->buflen, "HTTPStatusStream");
1.105 frystyk 323: me->target = HTStreamStack(WWW_UNKNOWN, req->output_format,
324: req->output_stream, req, NO);
1.88 frystyk 325: me->http->next = HTTP_GOT_DATA;
1.80 frystyk 326: if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
327: me->transparent = YES;
1.123 frystyk 328: HTHost_setVersion(host, HTTP_09);
1.80 frystyk 329: return status;
330: } else {
1.81 frystyk 331: char *ptr = me->buffer+5; /* Skip the HTTP part */
332: me->version = HTNextField(&ptr);
1.95 frystyk 333:
334: /* here we want to find out when to use persistent connection */
1.123 frystyk 335: HTHost_setVersion(host, HTTP_10);
1.95 frystyk 336:
1.81 frystyk 337: me->status = atoi(HTNextField(&ptr));
338: me->reason = ptr;
339: if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
340: *ptr = '0円';
341: else if ((ptr = strchr(me->reason, '\n')) != NULL)
342: *ptr = '0円';
343:
344: /* Set up the streams */
1.112 frystyk 345: if (me->status==200) {
1.80 frystyk 346: HTStream *s;
1.103 frystyk 347: me->target = HTStreamStack(WWW_MIME, req->output_format,
348: req->output_stream, req, NO);
1.80 frystyk 349:
1.103 frystyk 350: /* howcome: test for return value from HTCacheWriter 12/1/95 */
351: if (req->method==METHOD_GET && HTCache_isEnabled() &&
352: (s = HTCacheWriter(req, NULL, WWW_MIME, req->output_format,
353: req->output_stream))) {
1.113 frystyk 354: me->target = HTTee(me->target, s, NULL);
1.103 frystyk 355: }
1.94 frystyk 356: } else if (req->debug_stream) {
357: me->target = HTStreamStack(WWW_MIME, req->debug_format,
358: req->debug_stream, req, NO);
1.71 frystyk 359: } else {
1.103 frystyk 360: /* We still need to parser the MIME part */
1.114 frystyk 361: me->target = HTStreamStack(WWW_MIME, req->debug_format,
362: req->debug_stream, req, NO);
1.56 frystyk 363: }
364: }
1.113 frystyk 365: if (!me->target) me->target = HTErrorStream();
1.81 frystyk 366: HTTPNextState(me); /* Get next state */
1.80 frystyk 367: me->transparent = YES;
368: return HT_OK;
1.71 frystyk 369: }
1.56 frystyk 370:
1.80 frystyk 371: /*
372: ** Searches for HTTP header line until buffer fills up or a CRLF or LF
373: ** is found
374: */
1.119 frystyk 375: PRIVATE int HTTPStatus_put_block (HTStream * me, const char * b, int l)
1.71 frystyk 376: {
1.80 frystyk 377: while (!me->transparent && l-- > 0) {
378: int status;
379: if (me->target) {
380: if ((status = stream_pipe(me)) != HT_OK)
381: return status;
382: } else {
383: *(me->buffer+me->buflen++) = *b;
384: if (me->state == EOL_FCR) {
385: if (*b == LF) { /* Line found */
386: if ((status = stream_pipe(me)) != HT_OK)
387: return status;
388: } else {
389: me->state = EOL_BEGIN;
390: }
391: } else if (*b == CR) {
392: me->state = EOL_FCR;
393: } else if (*b == LF) {
394: if ((status = stream_pipe(me)) != HT_OK)
395: return status;
1.71 frystyk 396: } else {
1.80 frystyk 397: if (me->buflen >= MAX_STATUS_LEN) {
398: if ((status = stream_pipe(me)) != HT_OK)
399: return status;
400: }
1.71 frystyk 401: }
1.80 frystyk 402: b++;
1.71 frystyk 403: }
1.56 frystyk 404: }
1.99 frystyk 405: if (l > 0) return PUTBLOCK(b, l);
406: return HT_OK;
1.56 frystyk 407: }
408:
1.119 frystyk 409: PRIVATE int HTTPStatus_put_string (HTStream * me, const char * s)
1.71 frystyk 410: {
1.80 frystyk 411: return HTTPStatus_put_block(me, s, (int) strlen(s));
1.71 frystyk 412: }
1.56 frystyk 413:
1.100 frystyk 414: PRIVATE int HTTPStatus_put_character (HTStream * me, char c)
1.71 frystyk 415: {
1.80 frystyk 416: return HTTPStatus_put_block(me, &c, 1);
417: }
418:
1.100 frystyk 419: PRIVATE int HTTPStatus_flush (HTStream * me)
1.80 frystyk 420: {
421: return (*me->target->isa->flush)(me->target);
1.71 frystyk 422: }
423:
1.100 frystyk 424: PRIVATE int HTTPStatus_free (HTStream * me)
1.71 frystyk 425: {
1.87 frystyk 426: int status = HT_OK;
427: if (me->target) {
428: if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
429: return HT_WOULD_BLOCK;
430: }
1.115 frystyk 431: HT_FREE(me);
1.100 frystyk 432: return status;
1.71 frystyk 433: }
434:
1.104 frystyk 435: PRIVATE int HTTPStatus_abort (HTStream * me, HTList * e)
1.71 frystyk 436: {
437: if (me->target)
1.74 frystyk 438: ABORT_TARGET;
1.115 frystyk 439: HT_FREE(me);
1.74 frystyk 440: if (PROT_TRACE)
1.116 eric 441: HTTrace("HTTPStatus.. ABORTING...\n");
1.80 frystyk 442: return HT_ERROR;
1.71 frystyk 443: }
444:
445: /* HTTPStatus Stream
446: ** -----------------
447: */
1.119 frystyk 448: PRIVATE const HTStreamClass HTTPStatusClass =
1.71 frystyk 449: {
450: "HTTPStatus",
1.80 frystyk 451: HTTPStatus_flush,
1.71 frystyk 452: HTTPStatus_free,
453: HTTPStatus_abort,
454: HTTPStatus_put_character,
455: HTTPStatus_put_string,
456: HTTPStatus_put_block
457: };
458:
1.113 frystyk 459: #if 0
1.100 frystyk 460: PRIVATE HTStream * HTTPStatus_new (HTRequest * request, http_info * http)
1.113 frystyk 461: #endif
462:
463: PUBLIC HTStream * HTTPStatus_new (HTRequest * request,
464: void * param,
465: HTFormat input_format,
466: HTFormat output_format,
467: HTStream * output_stream)
1.71 frystyk 468: {
1.115 frystyk 469: HTStream * me;
470: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
471: HT_OUTOFMEM("HTTPStatus_new");
1.71 frystyk 472: me->isa = &HTTPStatusClass;
1.113 frystyk 473: if (request) {
474: HTNet * net = request->net;
1.125 ! frystyk 475: /* Get existing copy */
! 476: http_info * http = (http_info *) HTNet_context(net);
1.113 frystyk 477: me->request = request;
478: me->http = http;
479: http->next = HTTP_ERROR;
480: me->state = EOL_BEGIN;
481: return me;
482: } else
483: return HTErrorStream();
1.71 frystyk 484: }
485:
486: /* ------------------------------------------------------------------------- */
487:
488: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 489: ** ==============================
490: **
491: ** Given a hypertext address, this routine loads a document.
492: **
493: ** On entry,
494: ** request This is the request structure
1.94 frystyk 495: ** returns HT_ERROR Error has occured in call back
496: ** HT_OK Call back was OK
1.55 frystyk 497: */
1.94 frystyk 498: PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request, SockOps ops)
1.55 frystyk 499: {
1.71 frystyk 500: int status = HT_ERROR;
1.94 frystyk 501: HTNet *net = request->net; /* Generic protocol information */
1.55 frystyk 502: http_info *http; /* Specific protocol information */
1.112 frystyk 503: HTParentAnchor *anchor = HTRequest_anchor(request);
504:
1.94 frystyk 505: /*
506: ** Initiate a new http structure and bind to request structure
507: ** This is actually state HTTP_BEGIN, but it can't be in the state
508: ** machine as we need the structure first.
509: */
510: if (ops == FD_NONE) {
1.116 eric 511: if (PROT_TRACE) HTTrace("HTTP........ Looking for `%s\'\n",
1.112 frystyk 512: HTAnchor_physical(anchor));
1.115 frystyk 513: if ((http = (http_info *) HT_CALLOC(1, sizeof(http_info))) == NULL)
514: HT_OUTOFMEM("HTLoadHTTP");
1.71 frystyk 515: http->state = HTTP_BEGIN;
1.113 frystyk 516: http->next = HTTP_GOT_DATA;
1.125 ! frystyk 517: HTNet_setContext(net, http);
1.98 frystyk 518: } else if (ops == FD_CLOSE) { /* Interrupted */
1.112 frystyk 519: HTRequest_addError(request, ERR_FATAL, NO, HTERR_INTERRUPTED,
520: NULL, 0, "HTLoadHTTP");
521: HTTPCleanup(request, HT_INTERRUPTED);
1.94 frystyk 522: return HT_OK;
523: } else
1.125 ! frystyk 524: http = (http_info *) HTNet_context(net); /* Get existing copy */
1.71 frystyk 525:
526: /* Now jump into the machine. We know the state from the previous run */
527: while (1) {
528: switch (http->state) {
529: case HTTP_BEGIN:
530: /*
531: ** Compose authorization information (this was moved here
532: ** from after the making of the connection so that the connection
533: ** wouldn't have to wait while prompting username and password
534: ** from the user). -- AL 13.10.93
535: */
1.117 frystyk 536: if (HTAuth_generate(request)) {
537: if (PROT_TRACE)HTTrace("HTTP........ Credentials generated\n");
538: http->state = HTTP_NEED_CONNECTION;
539: } else {
540: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
541: NULL, 0, "HTLoadHTTP");
542: http->state = HTTP_ERROR;
1.71 frystyk 543: }
544: break;
545:
1.123 frystyk 546: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
547: status = HTDoConnect(net, HTAnchor_physical(anchor), HTTP_PORT);
1.80 frystyk 548: if (status == HT_OK) {
1.123 frystyk 549: /*
550: ** Check the protocol class to see if we have connected to a
551: ** the right class of server, in this case HTTP.
552: */
553: {
554: HTHost * host = HTNet_host(net);
555: char * s_class = HTHost_class(host);
556: if (s_class && strcasecomp(s_class, "http")) {
557: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
558: NULL, 0, "HTLoadHTTP");
559: http->state = HTTP_ERROR;
560: break;
561: }
562: HTHost_setClass(host, "http");
1.95 frystyk 563: }
564:
1.123 frystyk 565: /*
566: ** Create the stream pipe FROM the channel to the application.
567: ** The target for the input stream pipe is set up using the
568: ** stream stack.
1.113 frystyk 569: */
1.123 frystyk 570: HTNet_getInput(net, HTStreamStack(WWW_HTTP,
571: request->output_format,
572: request->output_stream,
573: request, YES), NULL, 0);
574: /*
575: ** Create the stream pipe TO the channel from the application
576: ** and hook it up to the request object
577: */
578: {
579: HTOutputStream * output = HTNet_getOutput(net, NULL, 0);
580: HTStream * app = HTMethod_hasEntity(request->method) ?
581: HTMIMERequest_new(request,
582: HTTPRequest_new(request,(HTStream*) output,NO),YES) :
583: HTTPRequest_new(request, (HTStream*) output, YES);
584: HTRequest_setInputStream(request, app);
585: }
1.88 frystyk 586:
587: /*
588: ** Set up concurrent read/write if this request isn't the
589: ** source for a PUT or POST. As source we don't start reading
590: ** before all destinations are ready. If destination then
591: ** register the input stream and get ready for read
592: */
1.112 frystyk 593: if (HTRequest_isDestination(request)) {
1.124 eric 594: HTEvent_register(net->sockfd, request, (SockOps) FD_READ,
1.94 frystyk 595: HTLoadHTTP, net->priority);
1.88 frystyk 596: HTRequest_linkDestination(request);
597: }
1.71 frystyk 598: http->state = HTTP_NEED_REQUEST;
1.96 frystyk 599: } else if (status == HT_WOULD_BLOCK || status == HT_PERSISTENT)
1.94 frystyk 600: return HT_OK;
1.71 frystyk 601: else
602: http->state = HTTP_ERROR; /* Error or interrupt */
603: break;
604:
1.87 frystyk 605: /* As we can do simultanous read and write this is now one state */
1.80 frystyk 606: case HTTP_NEED_REQUEST:
1.94 frystyk 607: if (ops == FD_WRITE || ops == FD_NONE) {
1.88 frystyk 608: if (HTRequest_isDestination(request)) {
1.94 frystyk 609: HTNet *srcnet = request->source->net;
1.112 frystyk 610: if (srcnet) {
1.124 eric 611: HTEvent_register(srcnet->sockfd, request->source,
1.112 frystyk 612: (SockOps) FD_READ,
613: srcnet->cbf, srcnet->priority);
1.124 eric 614: HTEvent_unregister(net->sockfd, FD_WRITE);
1.112 frystyk 615: }
1.94 frystyk 616: return HT_OK;
1.80 frystyk 617: }
1.101 frystyk 618: status = request->PostCallback ?
619: request->PostCallback(request, request->input_stream) :
1.88 frystyk 620: (*request->input_stream->isa->flush)(request->input_stream);
1.71 frystyk 621: if (status == HT_WOULD_BLOCK)
1.94 frystyk 622: return HT_OK;
623: else
624: ops = FD_READ; /* Trick to ensure that we do READ */
625: } else if (ops == FD_READ) {
1.123 frystyk 626: status = (*net->input->isa->read)(net->input);
1.80 frystyk 627: if (status == HT_WOULD_BLOCK)
1.94 frystyk 628: return HT_OK;
1.113 frystyk 629: else if (status==HT_LOADED || status==HT_CLOSED)
1.94 frystyk 630: http->state = http->next; /* Jump to next state */
631: else
632: http->state = HTTP_ERROR;
1.90 frystyk 633: } else {
1.78 frystyk 634: http->state = HTTP_ERROR;
1.90 frystyk 635: }
1.71 frystyk 636: break;
1.80 frystyk 637:
1.91 frystyk 638: case HTTP_NOT_MODIFIED:
639: http->state = HTTP_ERROR;
640: break;
641:
1.112 frystyk 642: case HTTP_PERM_REDIRECT:
643: if (HTRequest_isPostWeb(request)) {
644: if (HTRequest_isDestination(request)) {
645: HTLink *link =
646: HTAnchor_findLink((HTAnchor *) request->source->anchor,
647: (HTAnchor *) anchor);
648: HTLink_setResult(link, HT_LINK_ERROR);
649: }
1.88 frystyk 650: HTRequest_killPostWeb(request);
1.112 frystyk 651: }
652: HTTPCleanup(request, HT_PERM_REDIRECT);
653: return HT_OK;
654: break;
655:
1.88 frystyk 656:
1.112 frystyk 657: case HTTP_TEMP_REDIRECT:
658: if (HTRequest_isPostWeb(request)) {
659: if (HTRequest_isDestination(request)) {
660: HTLink *link =
661: HTAnchor_findLink((HTAnchor *) request->source->anchor,
662: (HTAnchor *) anchor);
663: HTLink_setResult(link, HT_LINK_ERROR);
1.58 frystyk 664: }
1.112 frystyk 665: HTRequest_killPostWeb(request);
1.71 frystyk 666: }
1.112 frystyk 667: HTTPCleanup(request, HT_TEMP_REDIRECT);
668: return HT_OK;
1.71 frystyk 669: break;
1.112 frystyk 670:
1.71 frystyk 671: case HTTP_AA:
1.112 frystyk 672: if (HTRequest_isPostWeb(request)) {
673: if (HTRequest_isDestination(request)) {
674: HTLink *link =
675: HTAnchor_findLink((HTAnchor *) request->source->anchor,
676: (HTAnchor *) anchor);
677: HTLink_setResult(link, HT_LINK_ERROR);
678: }
1.88 frystyk 679: HTRequest_killPostWeb(request);
1.71 frystyk 680: }
1.112 frystyk 681: HTTPCleanup(request, HT_NO_ACCESS);
682: return HT_OK;
1.71 frystyk 683: break;
1.112 frystyk 684:
1.71 frystyk 685: case HTTP_GOT_DATA:
1.88 frystyk 686: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 687: if (HTRequest_isDestination(request)) {
688: HTLink *link =
689: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 690: (HTAnchor *) anchor);
1.109 frystyk 691: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 692: }
1.112 frystyk 693: }
694: HTTPCleanup(request, HT_LOADED);
1.94 frystyk 695: return HT_OK;
1.71 frystyk 696: break;
697:
698: case HTTP_NO_DATA:
1.88 frystyk 699: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 700: if (HTRequest_isDestination(request)) {
701: HTLink *link =
702: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 703: (HTAnchor *) anchor);
1.109 frystyk 704: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 705: }
1.112 frystyk 706: }
707: HTTPCleanup(request, HT_NO_DATA);
1.94 frystyk 708: return HT_OK;
1.71 frystyk 709: break;
1.80 frystyk 710:
1.94 frystyk 711: case HTTP_RETRY:
1.88 frystyk 712: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 713: if (HTRequest_isDestination(request)) {
714: HTLink *link =
715: HTAnchor_findLink((HTAnchor*) request->source->anchor,
1.112 frystyk 716: (HTAnchor*) anchor);
1.109 frystyk 717: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 718: }
1.112 frystyk 719: HTRequest_killPostWeb(request);
720: }
721: HTTPCleanup(request, HT_RETRY);
1.94 frystyk 722: return HT_OK;
1.81 frystyk 723: break;
724:
1.71 frystyk 725: case HTTP_ERROR:
1.88 frystyk 726: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 727: if (HTRequest_isDestination(request)) {
728: HTLink *link =
729: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 730: (HTAnchor *) anchor);
1.109 frystyk 731: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 732: }
1.112 frystyk 733: HTRequest_killPostWeb(request);
734: }
1.120 eric 735: HTTPCleanup(request, status);
1.94 frystyk 736: return HT_OK;
1.71 frystyk 737: break;
738: }
739: } /* End of while(1) */
740: }
1.88 frystyk 741:
1.21 luotonen 742:
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