Annotation of libwww/Library/src/HTTP.c, revision 1.126
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.
1.126 ! frystyk 6: ** @(#) $Id: HTTP.c,v 1.125 1996年05月20日 15:07:19 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:
1.78 frystyk 128: case 0: /* 0.9 response */
129: case 200:
1.112 frystyk 130: me->http->next = HTTP_GOT_DATA;
131: break;
132:
1.78 frystyk 133: case 201:
1.112 frystyk 134: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CREATED,
135: me->reason, (int) strlen(me->reason),
136: "HTTPNextState");
137: me->http->next = HTTP_GOT_DATA;
138: break;
139:
1.78 frystyk 140: case 202:
1.112 frystyk 141: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_ACCEPTED,
142: me->reason, (int) strlen(me->reason),
143: "HTTPNextState");
144: me->http->next = HTTP_GOT_DATA;
145: break;
146:
1.78 frystyk 147: case 203:
1.112 frystyk 148: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PARTIAL,
149: me->reason, (int) strlen(me->reason),
150: "HTTPNextState");
1.81 frystyk 151: me->http->next = HTTP_GOT_DATA;
1.71 frystyk 152: break;
1.78 frystyk 153:
154: case 204: /* No Response */
1.112 frystyk 155: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NO_CONTENT,
156: me->reason, (int) strlen(me->reason),
157: "HTTPNextState");
1.81 frystyk 158: me->http->next = HTTP_NO_DATA;
1.71 frystyk 159: break;
1.78 frystyk 160:
1.71 frystyk 161: case 301: /* Moved */
1.112 frystyk 162: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MOVED,
163: me->reason, (int) strlen(me->reason),
164: "HTTPNextState");
165: me->http->next = HTTP_PERM_REDIRECT;
166: break;
167:
1.71 frystyk 168: case 302: /* Found */
1.112 frystyk 169: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_FOUND,
170: me->reason, (int) strlen(me->reason),
171: "HTTPNextState");
172: me->http->next = HTTP_TEMP_REDIRECT;
1.71 frystyk 173: break;
1.55 frystyk 174:
1.71 frystyk 175: case 303: /* Method */
1.107 frystyk 176: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
177: me->reason, (int) strlen(me->reason),
178: "HTTPNextState");
1.81 frystyk 179: me->http->next = HTTP_ERROR;
1.71 frystyk 180: break;
1.91 frystyk 181:
182: case 304: /* Not Modified */
1.112 frystyk 183: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_MODIFIED,
184: me->reason, (int) strlen(me->reason),
185: "HTTPNextState");
1.91 frystyk 186: me->http->next = HTTP_NOT_MODIFIED;
187: break;
1.55 frystyk 188:
1.78 frystyk 189: case 400: /* Bad Request */
1.104 frystyk 190: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
1.100 frystyk 191: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 192: me->http->next = HTTP_ERROR;
1.71 frystyk 193: break;
1.70 howcome 194:
1.71 frystyk 195: case 401:
1.104 frystyk 196: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.100 frystyk 197: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 198: me->http->next = HTTP_AA;
1.71 frystyk 199: break;
200:
201: case 402: /* Payment required */
1.104 frystyk 202: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
1.100 frystyk 203: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 204: me->http->next = HTTP_ERROR;
1.71 frystyk 205: break;
1.55 frystyk 206:
1.71 frystyk 207: case 403: /* Forbidden */
1.104 frystyk 208: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
1.100 frystyk 209: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 210: me->http->next = HTTP_ERROR;
1.71 frystyk 211: break;
1.55 frystyk 212:
1.71 frystyk 213: case 404: /* Not Found */
1.104 frystyk 214: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
1.100 frystyk 215: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 216: me->http->next = HTTP_ERROR;
1.71 frystyk 217: break;
218:
1.78 frystyk 219: case 405: /* Not Allowed */
1.104 frystyk 220: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
1.100 frystyk 221: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 222: me->http->next = HTTP_ERROR;
1.78 frystyk 223: break;
224:
225: case 406: /* None Acceptable */
1.104 frystyk 226: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
1.100 frystyk 227: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 228: me->http->next = HTTP_ERROR;
1.78 frystyk 229: break;
230:
231: case 407: /* Proxy Authentication Required */
1.104 frystyk 232: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PROXY,
1.100 frystyk 233: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 234: me->http->next = HTTP_ERROR;
1.78 frystyk 235: break;
236:
237: case 408: /* Request Timeout */
1.104 frystyk 238: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
1.100 frystyk 239: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 240: me->http->next = HTTP_ERROR;
1.78 frystyk 241: break;
242:
1.71 frystyk 243: case 500:
1.104 frystyk 244: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
1.100 frystyk 245: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 246: me->http->next = HTTP_ERROR;
1.78 frystyk 247: break;
248:
1.71 frystyk 249: case 501:
1.104 frystyk 250: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
1.100 frystyk 251: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 252: me->http->next = HTTP_ERROR;
1.78 frystyk 253: break;
254:
255: case 502:
1.104 frystyk 256: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
1.100 frystyk 257: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 258: me->http->next = HTTP_ERROR;
1.78 frystyk 259: break;
260:
261: case 503:
1.104 frystyk 262: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_DOWN,
1.100 frystyk 263: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 264:
265: /* If Retry-After header is found then return HT_RETRY else HT_ERROR */
1.126 ! frystyk 266: if (HTRequest_retryTime(me->request))
1.81 frystyk 267: me->http->next = HTTP_RETRY;
268: else
269: me->http->next = HTTP_ERROR;
1.78 frystyk 270: break;
271:
272: case 504:
1.104 frystyk 273: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
1.100 frystyk 274: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 275: me->http->next = HTTP_ERROR;
1.71 frystyk 276: break;
1.78 frystyk 277:
1.71 frystyk 278: default: /* bad number */
1.104 frystyk 279: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.100 frystyk 280: (void *) me->buffer, me->buflen, "HTTPNextState");
1.81 frystyk 281: me->http->next = HTTP_ERROR;
1.71 frystyk 282: break;
1.55 frystyk 283: }
284: }
285:
1.71 frystyk 286: /* ------------------------------------------------------------------------- */
287: /* HTTP Status Line Stream */
288: /* ------------------------------------------------------------------------- */
1.55 frystyk 289:
1.71 frystyk 290: /*
1.80 frystyk 291: ** Analyse the stream we have read. If it is a HTTP 1.0 or higher
1.71 frystyk 292: ** then create a MIME-stream, else create a Guess stream to find out
293: ** what the 0.9 server is sending. We need to copy the buffer as we don't
294: ** know if we can modify the contents or not.
1.78 frystyk 295: **
296: ** Stream handling is a function of the status code returned from the
297: ** server:
298: ** 200: Use `output_stream' in HTRequest structure
1.94 frystyk 299: ** else: Use `debug_stream' in HTRequest structure
1.80 frystyk 300: **
301: ** Return: YES if buffer should be written out. NO otherwise
1.56 frystyk 302: */
1.100 frystyk 303: PRIVATE int stream_pipe (HTStream * me)
1.56 frystyk 304: {
1.123 frystyk 305: HTRequest * req = me->request;
306: HTNet * net = req->net;
307: HTHost * host = HTNet_host(net);
1.80 frystyk 308: if (me->target) {
309: int status = PUTBLOCK(me->buffer, me->buflen);
310: if (status == HT_OK)
311: me->transparent = YES;
312: return status;
1.88 frystyk 313: } else if (HTRequest_isSource(req) && !req->output_stream) {
314: /*
315: ** We need to wait for the destinations to get ready
316: */
317: return HT_WOULD_BLOCK;
1.80 frystyk 318: }
1.88 frystyk 319:
1.81 frystyk 320: if (strncasecomp(me->buffer, "http/", 5)) {
1.80 frystyk 321: int status;
1.104 frystyk 322: HTRequest_addError(req, ERR_INFO, NO, HTERR_HTTP09,
1.80 frystyk 323: (void *) me->buffer, me->buflen, "HTTPStatusStream");
1.105 frystyk 324: me->target = HTStreamStack(WWW_UNKNOWN, req->output_format,
325: req->output_stream, req, NO);
1.88 frystyk 326: me->http->next = HTTP_GOT_DATA;
1.80 frystyk 327: if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
328: me->transparent = YES;
1.123 frystyk 329: HTHost_setVersion(host, HTTP_09);
1.80 frystyk 330: return status;
331: } else {
1.81 frystyk 332: char *ptr = me->buffer+5; /* Skip the HTTP part */
333: me->version = HTNextField(&ptr);
1.95 frystyk 334:
335: /* here we want to find out when to use persistent connection */
1.123 frystyk 336: HTHost_setVersion(host, HTTP_10);
1.95 frystyk 337:
1.81 frystyk 338: me->status = atoi(HTNextField(&ptr));
339: me->reason = ptr;
340: if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
341: *ptr = '0円';
342: else if ((ptr = strchr(me->reason, '\n')) != NULL)
343: *ptr = '0円';
344:
345: /* Set up the streams */
1.112 frystyk 346: if (me->status==200) {
1.80 frystyk 347: HTStream *s;
1.103 frystyk 348: me->target = HTStreamStack(WWW_MIME, req->output_format,
349: req->output_stream, req, NO);
1.80 frystyk 350:
1.103 frystyk 351: /* howcome: test for return value from HTCacheWriter 12/1/95 */
352: if (req->method==METHOD_GET && HTCache_isEnabled() &&
353: (s = HTCacheWriter(req, NULL, WWW_MIME, req->output_format,
354: req->output_stream))) {
1.113 frystyk 355: me->target = HTTee(me->target, s, NULL);
1.103 frystyk 356: }
1.94 frystyk 357: } else if (req->debug_stream) {
358: me->target = HTStreamStack(WWW_MIME, req->debug_format,
359: req->debug_stream, req, NO);
1.71 frystyk 360: } else {
1.103 frystyk 361: /* We still need to parser the MIME part */
1.114 frystyk 362: me->target = HTStreamStack(WWW_MIME, req->debug_format,
363: req->debug_stream, req, NO);
1.56 frystyk 364: }
365: }
1.113 frystyk 366: if (!me->target) me->target = HTErrorStream();
1.81 frystyk 367: HTTPNextState(me); /* Get next state */
1.80 frystyk 368: me->transparent = YES;
369: return HT_OK;
1.71 frystyk 370: }
1.56 frystyk 371:
1.80 frystyk 372: /*
373: ** Searches for HTTP header line until buffer fills up or a CRLF or LF
374: ** is found
375: */
1.119 frystyk 376: PRIVATE int HTTPStatus_put_block (HTStream * me, const char * b, int l)
1.71 frystyk 377: {
1.80 frystyk 378: while (!me->transparent && l-- > 0) {
379: int status;
380: if (me->target) {
381: if ((status = stream_pipe(me)) != HT_OK)
382: return status;
383: } else {
384: *(me->buffer+me->buflen++) = *b;
385: if (me->state == EOL_FCR) {
386: if (*b == LF) { /* Line found */
387: if ((status = stream_pipe(me)) != HT_OK)
388: return status;
389: } else {
390: me->state = EOL_BEGIN;
391: }
392: } else if (*b == CR) {
393: me->state = EOL_FCR;
394: } else if (*b == LF) {
395: if ((status = stream_pipe(me)) != HT_OK)
396: return status;
1.71 frystyk 397: } else {
1.80 frystyk 398: if (me->buflen >= MAX_STATUS_LEN) {
399: if ((status = stream_pipe(me)) != HT_OK)
400: return status;
401: }
1.71 frystyk 402: }
1.80 frystyk 403: b++;
1.71 frystyk 404: }
1.56 frystyk 405: }
1.99 frystyk 406: if (l > 0) return PUTBLOCK(b, l);
407: return HT_OK;
1.56 frystyk 408: }
409:
1.119 frystyk 410: PRIVATE int HTTPStatus_put_string (HTStream * me, const char * s)
1.71 frystyk 411: {
1.80 frystyk 412: return HTTPStatus_put_block(me, s, (int) strlen(s));
1.71 frystyk 413: }
1.56 frystyk 414:
1.100 frystyk 415: PRIVATE int HTTPStatus_put_character (HTStream * me, char c)
1.71 frystyk 416: {
1.80 frystyk 417: return HTTPStatus_put_block(me, &c, 1);
418: }
419:
1.100 frystyk 420: PRIVATE int HTTPStatus_flush (HTStream * me)
1.80 frystyk 421: {
422: return (*me->target->isa->flush)(me->target);
1.71 frystyk 423: }
424:
1.100 frystyk 425: PRIVATE int HTTPStatus_free (HTStream * me)
1.71 frystyk 426: {
1.87 frystyk 427: int status = HT_OK;
428: if (me->target) {
429: if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
430: return HT_WOULD_BLOCK;
431: }
1.115 frystyk 432: HT_FREE(me);
1.100 frystyk 433: return status;
1.71 frystyk 434: }
435:
1.104 frystyk 436: PRIVATE int HTTPStatus_abort (HTStream * me, HTList * e)
1.71 frystyk 437: {
438: if (me->target)
1.74 frystyk 439: ABORT_TARGET;
1.115 frystyk 440: HT_FREE(me);
1.74 frystyk 441: if (PROT_TRACE)
1.116 eric 442: HTTrace("HTTPStatus.. ABORTING...\n");
1.80 frystyk 443: return HT_ERROR;
1.71 frystyk 444: }
445:
446: /* HTTPStatus Stream
447: ** -----------------
448: */
1.119 frystyk 449: PRIVATE const HTStreamClass HTTPStatusClass =
1.71 frystyk 450: {
451: "HTTPStatus",
1.80 frystyk 452: HTTPStatus_flush,
1.71 frystyk 453: HTTPStatus_free,
454: HTTPStatus_abort,
455: HTTPStatus_put_character,
456: HTTPStatus_put_string,
457: HTTPStatus_put_block
458: };
459:
1.113 frystyk 460: #if 0
1.100 frystyk 461: PRIVATE HTStream * HTTPStatus_new (HTRequest * request, http_info * http)
1.113 frystyk 462: #endif
463:
464: PUBLIC HTStream * HTTPStatus_new (HTRequest * request,
465: void * param,
466: HTFormat input_format,
467: HTFormat output_format,
468: HTStream * output_stream)
1.71 frystyk 469: {
1.115 frystyk 470: HTStream * me;
471: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
472: HT_OUTOFMEM("HTTPStatus_new");
1.71 frystyk 473: me->isa = &HTTPStatusClass;
1.113 frystyk 474: if (request) {
1.126 ! frystyk 475: HTNet * net = HTRequest_net(request);
1.125 frystyk 476: /* Get existing copy */
477: http_info * http = (http_info *) HTNet_context(net);
1.113 frystyk 478: me->request = request;
479: me->http = http;
480: http->next = HTTP_ERROR;
481: me->state = EOL_BEGIN;
482: return me;
483: } else
484: return HTErrorStream();
1.71 frystyk 485: }
486:
487: /* ------------------------------------------------------------------------- */
488:
489: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 490: ** ==============================
491: **
492: ** Given a hypertext address, this routine loads a document.
493: **
494: ** On entry,
495: ** request This is the request structure
1.94 frystyk 496: ** returns HT_ERROR Error has occured in call back
497: ** HT_OK Call back was OK
1.55 frystyk 498: */
1.94 frystyk 499: PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request, SockOps ops)
1.55 frystyk 500: {
1.71 frystyk 501: int status = HT_ERROR;
1.126 ! frystyk 502: HTNet * net = HTRequest_net(request); /* Generic protocol information */
1.55 frystyk 503: http_info *http; /* Specific protocol information */
1.112 frystyk 504: HTParentAnchor *anchor = HTRequest_anchor(request);
505:
1.94 frystyk 506: /*
507: ** Initiate a new http structure and bind to request structure
508: ** This is actually state HTTP_BEGIN, but it can't be in the state
509: ** machine as we need the structure first.
510: */
511: if (ops == FD_NONE) {
1.116 eric 512: if (PROT_TRACE) HTTrace("HTTP........ Looking for `%s\'\n",
1.112 frystyk 513: HTAnchor_physical(anchor));
1.115 frystyk 514: if ((http = (http_info *) HT_CALLOC(1, sizeof(http_info))) == NULL)
515: HT_OUTOFMEM("HTLoadHTTP");
1.71 frystyk 516: http->state = HTTP_BEGIN;
1.113 frystyk 517: http->next = HTTP_GOT_DATA;
1.125 frystyk 518: HTNet_setContext(net, http);
1.98 frystyk 519: } else if (ops == FD_CLOSE) { /* Interrupted */
1.112 frystyk 520: HTRequest_addError(request, ERR_FATAL, NO, HTERR_INTERRUPTED,
521: NULL, 0, "HTLoadHTTP");
522: HTTPCleanup(request, HT_INTERRUPTED);
1.94 frystyk 523: return HT_OK;
524: } else
1.125 frystyk 525: http = (http_info *) HTNet_context(net); /* Get existing copy */
1.71 frystyk 526:
527: /* Now jump into the machine. We know the state from the previous run */
528: while (1) {
529: switch (http->state) {
530: case HTTP_BEGIN:
531: /*
532: ** Compose authorization information (this was moved here
533: ** from after the making of the connection so that the connection
534: ** wouldn't have to wait while prompting username and password
535: ** from the user). -- AL 13.10.93
536: */
1.117 frystyk 537: if (HTAuth_generate(request)) {
538: if (PROT_TRACE)HTTrace("HTTP........ Credentials generated\n");
539: http->state = HTTP_NEED_CONNECTION;
540: } else {
541: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
542: NULL, 0, "HTLoadHTTP");
543: http->state = HTTP_ERROR;
1.71 frystyk 544: }
545: break;
546:
1.123 frystyk 547: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
548: status = HTDoConnect(net, HTAnchor_physical(anchor), HTTP_PORT);
1.80 frystyk 549: if (status == HT_OK) {
1.123 frystyk 550: /*
551: ** Check the protocol class to see if we have connected to a
552: ** the right class of server, in this case HTTP.
553: */
554: {
555: HTHost * host = HTNet_host(net);
556: char * s_class = HTHost_class(host);
557: if (s_class && strcasecomp(s_class, "http")) {
558: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
559: NULL, 0, "HTLoadHTTP");
560: http->state = HTTP_ERROR;
561: break;
562: }
563: HTHost_setClass(host, "http");
1.95 frystyk 564: }
565:
1.123 frystyk 566: /*
567: ** Create the stream pipe FROM the channel to the application.
568: ** The target for the input stream pipe is set up using the
569: ** stream stack.
1.113 frystyk 570: */
1.126 ! frystyk 571: HTNet_getInput(net,
! 572: HTStreamStack(WWW_HTTP,
! 573: HTRequest_outputFormat(request),
! 574: HTRequest_outputStream(request),
! 575: request, YES), NULL, 0);
1.123 frystyk 576: /*
577: ** Create the stream pipe TO the channel from the application
578: ** and hook it up to the request object
579: */
580: {
581: HTOutputStream * output = HTNet_getOutput(net, NULL, 0);
1.126 ! frystyk 582: HTStream * app =
! 583: HTMethod_hasEntity(HTRequest_method(request)) ?
1.123 frystyk 584: HTMIMERequest_new(request,
585: HTTPRequest_new(request,(HTStream*) output,NO),YES) :
586: HTTPRequest_new(request, (HTStream*) output, YES);
587: HTRequest_setInputStream(request, app);
588: }
1.88 frystyk 589:
590: /*
591: ** Set up concurrent read/write if this request isn't the
592: ** source for a PUT or POST. As source we don't start reading
593: ** before all destinations are ready. If destination then
594: ** register the input stream and get ready for read
595: */
1.112 frystyk 596: if (HTRequest_isDestination(request)) {
1.124 eric 597: HTEvent_register(net->sockfd, request, (SockOps) FD_READ,
1.94 frystyk 598: HTLoadHTTP, net->priority);
1.88 frystyk 599: HTRequest_linkDestination(request);
600: }
1.71 frystyk 601: http->state = HTTP_NEED_REQUEST;
1.96 frystyk 602: } else if (status == HT_WOULD_BLOCK || status == HT_PERSISTENT)
1.94 frystyk 603: return HT_OK;
1.71 frystyk 604: else
605: http->state = HTTP_ERROR; /* Error or interrupt */
606: break;
607:
1.87 frystyk 608: /* As we can do simultanous read and write this is now one state */
1.80 frystyk 609: case HTTP_NEED_REQUEST:
1.94 frystyk 610: if (ops == FD_WRITE || ops == FD_NONE) {
1.88 frystyk 611: if (HTRequest_isDestination(request)) {
1.126 ! frystyk 612: HTRequest * source = HTRequest_source(request);
! 613: HTNet * srcnet = HTRequest_net(source);
1.112 frystyk 614: if (srcnet) {
1.126 ! frystyk 615: SOCKET sockfd = HTNet_socket(srcnet);
! 616: HTEvent_register(sockfd, source,
1.112 frystyk 617: (SockOps) FD_READ,
618: srcnet->cbf, srcnet->priority);
1.126 ! frystyk 619: HTEvent_unregister(sockfd, FD_WRITE);
1.112 frystyk 620: }
1.94 frystyk 621: return HT_OK;
1.80 frystyk 622: }
1.126 ! frystyk 623:
! 624: /*
! 625: ** Should we use the input stream directly or call the post
! 626: ** callback function to send data down to the network?
! 627: */
! 628: {
! 629: HTStream * input = HTRequest_inputStream(request);
! 630: HTPostCallback * pcbf = HTRequest_postCallback(request);
! 631: status = pcbf ? pcbf(request, input) :
! 632: (*input->isa->flush)(input);
! 633: if (status == HT_WOULD_BLOCK)
! 634: return HT_OK;
! 635: else
! 636: ops = FD_READ; /* Trick to ensure that we do READ */
! 637: }
1.94 frystyk 638: } else if (ops == FD_READ) {
1.123 frystyk 639: status = (*net->input->isa->read)(net->input);
1.80 frystyk 640: if (status == HT_WOULD_BLOCK)
1.94 frystyk 641: return HT_OK;
1.113 frystyk 642: else if (status==HT_LOADED || status==HT_CLOSED)
1.94 frystyk 643: http->state = http->next; /* Jump to next state */
644: else
645: http->state = HTTP_ERROR;
1.90 frystyk 646: } else {
1.78 frystyk 647: http->state = HTTP_ERROR;
1.90 frystyk 648: }
1.71 frystyk 649: break;
1.80 frystyk 650:
1.91 frystyk 651: case HTTP_NOT_MODIFIED:
652: http->state = HTTP_ERROR;
653: break;
654:
1.112 frystyk 655: case HTTP_PERM_REDIRECT:
656: if (HTRequest_isPostWeb(request)) {
657: if (HTRequest_isDestination(request)) {
1.126 ! frystyk 658: HTRequest * source = HTRequest_source(request);
! 659: HTLink * link =
! 660: HTAnchor_findLink((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 661: (HTAnchor *) anchor);
662: HTLink_setResult(link, HT_LINK_ERROR);
663: }
1.88 frystyk 664: HTRequest_killPostWeb(request);
1.112 frystyk 665: }
666: HTTPCleanup(request, HT_PERM_REDIRECT);
667: return HT_OK;
668: break;
669:
1.88 frystyk 670:
1.112 frystyk 671: case HTTP_TEMP_REDIRECT:
672: if (HTRequest_isPostWeb(request)) {
673: if (HTRequest_isDestination(request)) {
1.126 ! frystyk 674: HTRequest * source = HTRequest_source(request);
1.112 frystyk 675: HTLink *link =
1.126 ! frystyk 676: HTAnchor_findLink((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 677: (HTAnchor *) anchor);
678: HTLink_setResult(link, HT_LINK_ERROR);
1.58 frystyk 679: }
1.112 frystyk 680: HTRequest_killPostWeb(request);
1.71 frystyk 681: }
1.112 frystyk 682: HTTPCleanup(request, HT_TEMP_REDIRECT);
683: return HT_OK;
1.71 frystyk 684: break;
1.112 frystyk 685:
1.71 frystyk 686: case HTTP_AA:
1.112 frystyk 687: if (HTRequest_isPostWeb(request)) {
688: if (HTRequest_isDestination(request)) {
1.126 ! frystyk 689: HTRequest * source = HTRequest_source(request);
1.112 frystyk 690: HTLink *link =
1.126 ! frystyk 691: HTAnchor_findLink((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 692: (HTAnchor *) anchor);
693: HTLink_setResult(link, HT_LINK_ERROR);
694: }
1.88 frystyk 695: HTRequest_killPostWeb(request);
1.71 frystyk 696: }
1.112 frystyk 697: HTTPCleanup(request, HT_NO_ACCESS);
698: return HT_OK;
1.71 frystyk 699: break;
1.112 frystyk 700:
1.71 frystyk 701: case HTTP_GOT_DATA:
1.88 frystyk 702: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 703: if (HTRequest_isDestination(request)) {
1.126 ! frystyk 704: HTRequest * source = HTRequest_source(request);
1.91 frystyk 705: HTLink *link =
1.126 ! frystyk 706: HTAnchor_findLink((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 707: (HTAnchor *) anchor);
1.109 frystyk 708: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 709: }
1.112 frystyk 710: }
711: HTTPCleanup(request, HT_LOADED);
1.94 frystyk 712: return HT_OK;
1.71 frystyk 713: break;
714:
715: case HTTP_NO_DATA:
1.88 frystyk 716: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 717: if (HTRequest_isDestination(request)) {
1.126 ! frystyk 718: HTRequest * source = HTRequest_source(request);
1.91 frystyk 719: HTLink *link =
1.126 ! frystyk 720: HTAnchor_findLink((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 721: (HTAnchor *) anchor);
1.109 frystyk 722: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 723: }
1.112 frystyk 724: }
725: HTTPCleanup(request, HT_NO_DATA);
1.94 frystyk 726: return HT_OK;
1.71 frystyk 727: break;
1.80 frystyk 728:
1.94 frystyk 729: case HTTP_RETRY:
1.88 frystyk 730: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 731: if (HTRequest_isDestination(request)) {
1.126 ! frystyk 732: HTRequest * source = HTRequest_source(request);
1.91 frystyk 733: HTLink *link =
1.126 ! frystyk 734: HTAnchor_findLink((HTAnchor *)HTRequest_anchor(source),
! 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: }
740: HTTPCleanup(request, HT_RETRY);
1.94 frystyk 741: return HT_OK;
1.81 frystyk 742: break;
743:
1.71 frystyk 744: case HTTP_ERROR:
1.88 frystyk 745: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 746: if (HTRequest_isDestination(request)) {
1.126 ! frystyk 747: HTRequest * source = HTRequest_source(request);
1.91 frystyk 748: HTLink *link =
1.126 ! frystyk 749: HTAnchor_findLink((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 750: (HTAnchor *) anchor);
1.109 frystyk 751: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 752: }
1.112 frystyk 753: HTRequest_killPostWeb(request);
754: }
1.120 eric 755: HTTPCleanup(request, status);
1.94 frystyk 756: return HT_OK;
1.71 frystyk 757: break;
758: }
759: } /* End of while(1) */
760: }
1.88 frystyk 761:
1.21 luotonen 762:
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