Annotation of libwww/Library/src/HTTP.c, revision 1.122
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.
1.122 ! frystyk 6: ** @(#) $Id: Date Author State $
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"
1.1 timbl 21: #include "HTUtils.h"
1.78 frystyk 22: #include "HTString.h"
1.71 frystyk 23: #include "HTParse.h"
1.1 timbl 24: #include "HTTCP.h"
25: #include "HTFormat.h"
1.85 frystyk 26: #include "HTSocket.h"
1.94 frystyk 27: #include "HTReqMan.h"
1.2 timbl 28: #include "HTAlert.h"
1.14 luotonen 29: #include "HTAABrow.h" /* Access Authorization */
1.20 timbl 30: #include "HTTee.h" /* Tee off a cache stream */
1.78 frystyk 31: #include "HTFWrite.h" /* Write to cache file */
1.90 frystyk 32: #include "HTCache.h"
1.80 frystyk 33: #include "HTWriter.h"
1.54 luotonen 34: #include "HTError.h"
1.94 frystyk 35: #include "HTAccess.h"
1.55 frystyk 36: #include "HTChunk.h"
1.105 frystyk 37: #include "HTWWWStr.h"
1.95 frystyk 38: #include "HTNetMan.h"
1.109 frystyk 39: #include "HTTPUtil.h"
1.113 frystyk 40: #include "HTMIMERq.h"
1.80 frystyk 41: #include "HTTPReq.h"
1.55 frystyk 42: #include "HTTP.h" /* Implements */
43:
44: /* Macros and other defines */
1.94 frystyk 45: #ifndef HTTP_PORT
46: #define HTTP_PORT 80 /* Allocated to http by Jon Postel/ISI 24-Jan-92 */
47: #endif
48:
1.71 frystyk 49: #define PUTC(c) (*me->target->isa->put_character)(me->target, c)
50: #define PUTS(s) (*me->target->isa->put_string)(me->target, s)
51: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
52: #define FREE_TARGET (*me->target->isa->_free)(me->target)
1.74 frystyk 53: #define ABORT_TARGET (*me->target->isa->abort)(me->target, e)
1.2 timbl 54:
1.59 frystyk 55: /* Type definitions and global variables etc. local to this module */
1.94 frystyk 56:
57: /* Final states have negative value */
1.59 frystyk 58: typedef enum _HTTPState {
1.81 frystyk 59: HTTP_RETRY = -4,
1.71 frystyk 60: HTTP_ERROR = -3,
61: HTTP_NO_DATA = -2,
62: HTTP_GOT_DATA = -1,
63: HTTP_BEGIN = 0,
64: HTTP_NEED_CONNECTION,
65: HTTP_NEED_REQUEST,
1.112 frystyk 66: HTTP_PERM_REDIRECT,
67: HTTP_TEMP_REDIRECT,
1.91 frystyk 68: HTTP_NOT_MODIFIED,
1.71 frystyk 69: HTTP_AA
1.59 frystyk 70: } HTTPState;
1.55 frystyk 71:
1.94 frystyk 72: /* This is the context structure for the this module */
1.55 frystyk 73: typedef struct _http_info {
1.81 frystyk 74: HTTPState state; /* Current State of the connection */
75: HTTPState next; /* Next state */
1.55 frystyk 76: } http_info;
77:
1.88 frystyk 78: #define MAX_STATUS_LEN 100 /* Max nb of chars to check StatusLine */
1.55 frystyk 79:
1.71 frystyk 80: struct _HTStream {
1.119 frystyk 81: const HTStreamClass * isa;
1.71 frystyk 82: HTStream * target;
83: HTRequest * request;
84: http_info * http;
1.121 frystyk 85: HTEOLState state;
1.71 frystyk 86: BOOL transparent;
1.81 frystyk 87: char * version; /* Should we save this? */
1.71 frystyk 88: int status;
1.81 frystyk 89: char * reason;
1.71 frystyk 90: char buffer[MAX_STATUS_LEN+1];
1.80 frystyk 91: int buflen;
1.71 frystyk 92: };
1.21 luotonen 93:
1.71 frystyk 94: /* ------------------------------------------------------------------------- */
95: /* Help Functions */
96: /* ------------------------------------------------------------------------- */
1.21 luotonen 97:
1.94 frystyk 98: /* HTTPCleanup
99: ** -----------
1.55 frystyk 100: ** This function closes the connection and frees memory.
1.94 frystyk 101: ** Returns YES on OK, else NO
1.1 timbl 102: */
1.94 frystyk 103: PRIVATE int HTTPCleanup (HTRequest *req, int status)
1.1 timbl 104: {
1.94 frystyk 105: HTNet *net = req->net;
106: http_info *http = (http_info *) net->context;
1.80 frystyk 107:
1.94 frystyk 108: /* Free stream with data TO network */
1.112 frystyk 109: if (HTRequest_isDestination(req))
110: HTRequest_removeDestination(req);
111: else if (req->input_stream) {
1.94 frystyk 112: if (status == HT_INTERRUPTED)
113: (*req->input_stream->isa->abort)(req->input_stream, NULL);
114: else
115: (*req->input_stream->isa->_free)(req->input_stream);
1.104 frystyk 116: req->input_stream = NULL;
1.94 frystyk 117: }
1.88 frystyk 118:
1.112 frystyk 119: /* Free user part of stream pipe if error */
120: if (!net->target && req->output_stream)
121: (*req->output_stream->isa->abort)(req->output_stream, NULL);
122:
1.94 frystyk 123: /* Remove the request object and our own context structure for http */
1.112 frystyk 124: HTNet_delete(net, req->internal ? HT_IGNORE : status);
1.115 frystyk 125: HT_FREE(http);
1.94 frystyk 126: return YES;
1.55 frystyk 127: }
128:
1.71 frystyk 129: /*
130: ** This is a big switch handling all HTTP return codes. It puts in any
131: ** appropiate error message and decides whether we should expect data
1.78 frystyk 132: ** or not.
1.55 frystyk 133: */
1.100 frystyk 134: PRIVATE void HTTPNextState (HTStream * me)
1.55 frystyk 135: {
1.71 frystyk 136: switch (me->status) {
137:
1.78 frystyk 138: case 0: /* 0.9 response */
139: case 200:
1.112 frystyk 140: me->http->next = HTTP_GOT_DATA;
141: break;
142:
1.78 frystyk 143: case 201:
1.112 frystyk 144: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CREATED,
145: me->reason, (int) strlen(me->reason),
146: "HTTPNextState");
147: me->http->next = HTTP_GOT_DATA;
148: break;
149:
1.78 frystyk 150: case 202:
1.112 frystyk 151: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_ACCEPTED,
152: me->reason, (int) strlen(me->reason),
153: "HTTPNextState");
154: me->http->next = HTTP_GOT_DATA;
155: break;
156:
1.78 frystyk 157: case 203:
1.112 frystyk 158: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PARTIAL,
159: me->reason, (int) strlen(me->reason),
160: "HTTPNextState");
1.81 frystyk 161: me->http->next = HTTP_GOT_DATA;
1.71 frystyk 162: break;
1.78 frystyk 163:
164: case 204: /* No Response */
1.112 frystyk 165: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NO_CONTENT,
166: me->reason, (int) strlen(me->reason),
167: "HTTPNextState");
1.81 frystyk 168: me->http->next = HTTP_NO_DATA;
1.71 frystyk 169: break;
1.78 frystyk 170:
1.71 frystyk 171: case 301: /* Moved */
1.112 frystyk 172: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MOVED,
173: me->reason, (int) strlen(me->reason),
174: "HTTPNextState");
175: me->http->next = HTTP_PERM_REDIRECT;
176: break;
177:
1.71 frystyk 178: case 302: /* Found */
1.112 frystyk 179: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_FOUND,
180: me->reason, (int) strlen(me->reason),
181: "HTTPNextState");
182: me->http->next = HTTP_TEMP_REDIRECT;
1.71 frystyk 183: break;
1.55 frystyk 184:
1.71 frystyk 185: case 303: /* Method */
1.107 frystyk 186: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
187: me->reason, (int) strlen(me->reason),
188: "HTTPNextState");
1.81 frystyk 189: me->http->next = HTTP_ERROR;
1.71 frystyk 190: break;
1.91 frystyk 191:
192: case 304: /* Not Modified */
1.112 frystyk 193: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_MODIFIED,
194: me->reason, (int) strlen(me->reason),
195: "HTTPNextState");
1.91 frystyk 196: me->http->next = HTTP_NOT_MODIFIED;
197: break;
1.55 frystyk 198:
1.78 frystyk 199: case 400: /* Bad Request */
1.104 frystyk 200: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
1.100 frystyk 201: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 202: me->http->next = HTTP_ERROR;
1.71 frystyk 203: break;
1.70 howcome 204:
1.71 frystyk 205: case 401:
1.104 frystyk 206: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.100 frystyk 207: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 208: me->http->next = HTTP_AA;
1.71 frystyk 209: break;
210:
211: case 402: /* Payment required */
1.104 frystyk 212: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
1.100 frystyk 213: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 214: me->http->next = HTTP_ERROR;
1.71 frystyk 215: break;
1.55 frystyk 216:
1.71 frystyk 217: case 403: /* Forbidden */
1.104 frystyk 218: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
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 404: /* Not Found */
1.104 frystyk 224: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
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;
228:
1.78 frystyk 229: case 405: /* Not Allowed */
1.104 frystyk 230: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
1.100 frystyk 231: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 232: me->http->next = HTTP_ERROR;
1.78 frystyk 233: break;
234:
235: case 406: /* None Acceptable */
1.104 frystyk 236: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
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 407: /* Proxy Authentication Required */
1.104 frystyk 242: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PROXY,
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 408: /* Request Timeout */
1.104 frystyk 248: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
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:
1.71 frystyk 253: case 500:
1.104 frystyk 254: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
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 501:
1.104 frystyk 260: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
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:
265: case 502:
1.104 frystyk 266: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
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 503:
1.104 frystyk 272: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_DOWN,
1.100 frystyk 273: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 274:
275: /* If Retry-After header is found then return HT_RETRY else HT_ERROR */
276: if (me->request->retry_after)
277: me->http->next = HTTP_RETRY;
278: else
279: me->http->next = HTTP_ERROR;
1.78 frystyk 280: break;
281:
282: case 504:
1.104 frystyk 283: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
1.100 frystyk 284: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 285: me->http->next = HTTP_ERROR;
1.71 frystyk 286: break;
1.78 frystyk 287:
1.71 frystyk 288: default: /* bad number */
1.104 frystyk 289: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.100 frystyk 290: (void *) me->buffer, me->buflen, "HTTPNextState");
1.81 frystyk 291: me->http->next = HTTP_ERROR;
1.71 frystyk 292: break;
1.55 frystyk 293: }
294: }
295:
1.71 frystyk 296: /* ------------------------------------------------------------------------- */
297: /* HTTP Status Line Stream */
298: /* ------------------------------------------------------------------------- */
1.55 frystyk 299:
1.71 frystyk 300: /*
1.80 frystyk 301: ** Analyse the stream we have read. If it is a HTTP 1.0 or higher
1.71 frystyk 302: ** then create a MIME-stream, else create a Guess stream to find out
303: ** what the 0.9 server is sending. We need to copy the buffer as we don't
304: ** know if we can modify the contents or not.
1.78 frystyk 305: **
306: ** Stream handling is a function of the status code returned from the
307: ** server:
308: ** 200: Use `output_stream' in HTRequest structure
1.94 frystyk 309: ** else: Use `debug_stream' in HTRequest structure
1.80 frystyk 310: **
311: ** Return: YES if buffer should be written out. NO otherwise
1.56 frystyk 312: */
1.100 frystyk 313: PRIVATE int stream_pipe (HTStream * me)
1.56 frystyk 314: {
1.71 frystyk 315: HTRequest *req = me->request;
1.95 frystyk 316: HTNet *net = req->net;
1.80 frystyk 317: if (me->target) {
318: int status = PUTBLOCK(me->buffer, me->buflen);
319: if (status == HT_OK)
320: me->transparent = YES;
321: return status;
1.88 frystyk 322: } else if (HTRequest_isSource(req) && !req->output_stream) {
323: /*
324: ** We need to wait for the destinations to get ready
325: */
326: return HT_WOULD_BLOCK;
1.80 frystyk 327: }
1.88 frystyk 328:
1.81 frystyk 329: if (strncasecomp(me->buffer, "http/", 5)) {
1.80 frystyk 330: int status;
1.104 frystyk 331: HTRequest_addError(req, ERR_INFO, NO, HTERR_HTTP09,
1.80 frystyk 332: (void *) me->buffer, me->buflen, "HTTPStatusStream");
1.105 frystyk 333: me->target = HTStreamStack(WWW_UNKNOWN, req->output_format,
334: req->output_stream, req, NO);
1.88 frystyk 335: me->http->next = HTTP_GOT_DATA;
1.80 frystyk 336: if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
337: me->transparent = YES;
1.98 frystyk 338: HTDNS_setServerVersion(net->dns, HTTP_09);
1.80 frystyk 339: return status;
340: } else {
1.81 frystyk 341: char *ptr = me->buffer+5; /* Skip the HTTP part */
342: me->version = HTNextField(&ptr);
1.95 frystyk 343:
344: /* here we want to find out when to use persistent connection */
1.98 frystyk 345: HTDNS_setServerVersion(net->dns, HTTP_10);
1.95 frystyk 346:
1.81 frystyk 347: me->status = atoi(HTNextField(&ptr));
348: me->reason = ptr;
349: if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
350: *ptr = '0円';
351: else if ((ptr = strchr(me->reason, '\n')) != NULL)
352: *ptr = '0円';
353:
354: /* Set up the streams */
1.112 frystyk 355: if (me->status==200) {
1.80 frystyk 356: HTStream *s;
1.103 frystyk 357: me->target = HTStreamStack(WWW_MIME, req->output_format,
358: req->output_stream, req, NO);
1.80 frystyk 359:
1.103 frystyk 360: /* howcome: test for return value from HTCacheWriter 12/1/95 */
361: if (req->method==METHOD_GET && HTCache_isEnabled() &&
362: (s = HTCacheWriter(req, NULL, WWW_MIME, req->output_format,
363: req->output_stream))) {
1.113 frystyk 364: me->target = HTTee(me->target, s, NULL);
1.103 frystyk 365: }
1.94 frystyk 366: } else if (req->debug_stream) {
367: me->target = HTStreamStack(WWW_MIME, req->debug_format,
368: req->debug_stream, req, NO);
1.71 frystyk 369: } else {
1.103 frystyk 370: /* We still need to parser the MIME part */
1.114 frystyk 371: me->target = HTStreamStack(WWW_MIME, req->debug_format,
372: req->debug_stream, req, NO);
1.56 frystyk 373: }
374: }
1.113 frystyk 375: if (!me->target) me->target = HTErrorStream();
1.81 frystyk 376: HTTPNextState(me); /* Get next state */
1.80 frystyk 377: me->transparent = YES;
378: return HT_OK;
1.71 frystyk 379: }
1.56 frystyk 380:
1.80 frystyk 381: /*
382: ** Searches for HTTP header line until buffer fills up or a CRLF or LF
383: ** is found
384: */
1.119 frystyk 385: PRIVATE int HTTPStatus_put_block (HTStream * me, const char * b, int l)
1.71 frystyk 386: {
1.80 frystyk 387: while (!me->transparent && l-- > 0) {
388: int status;
389: if (me->target) {
390: if ((status = stream_pipe(me)) != HT_OK)
391: return status;
392: } else {
393: *(me->buffer+me->buflen++) = *b;
394: if (me->state == EOL_FCR) {
395: if (*b == LF) { /* Line found */
396: if ((status = stream_pipe(me)) != HT_OK)
397: return status;
398: } else {
399: me->state = EOL_BEGIN;
400: }
401: } else if (*b == CR) {
402: me->state = EOL_FCR;
403: } else if (*b == LF) {
404: if ((status = stream_pipe(me)) != HT_OK)
405: return status;
1.71 frystyk 406: } else {
1.80 frystyk 407: if (me->buflen >= MAX_STATUS_LEN) {
408: if ((status = stream_pipe(me)) != HT_OK)
409: return status;
410: }
1.71 frystyk 411: }
1.80 frystyk 412: b++;
1.71 frystyk 413: }
1.56 frystyk 414: }
1.99 frystyk 415: if (l > 0) return PUTBLOCK(b, l);
416: return HT_OK;
1.56 frystyk 417: }
418:
1.119 frystyk 419: PRIVATE int HTTPStatus_put_string (HTStream * me, const char * s)
1.71 frystyk 420: {
1.80 frystyk 421: return HTTPStatus_put_block(me, s, (int) strlen(s));
1.71 frystyk 422: }
1.56 frystyk 423:
1.100 frystyk 424: PRIVATE int HTTPStatus_put_character (HTStream * me, char c)
1.71 frystyk 425: {
1.80 frystyk 426: return HTTPStatus_put_block(me, &c, 1);
427: }
428:
1.100 frystyk 429: PRIVATE int HTTPStatus_flush (HTStream * me)
1.80 frystyk 430: {
431: return (*me->target->isa->flush)(me->target);
1.71 frystyk 432: }
433:
1.100 frystyk 434: PRIVATE int HTTPStatus_free (HTStream * me)
1.71 frystyk 435: {
1.87 frystyk 436: int status = HT_OK;
437: if (me->target) {
438: if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
439: return HT_WOULD_BLOCK;
440: }
1.115 frystyk 441: HT_FREE(me);
1.100 frystyk 442: return status;
1.71 frystyk 443: }
444:
1.104 frystyk 445: PRIVATE int HTTPStatus_abort (HTStream * me, HTList * e)
1.71 frystyk 446: {
447: if (me->target)
1.74 frystyk 448: ABORT_TARGET;
1.115 frystyk 449: HT_FREE(me);
1.74 frystyk 450: if (PROT_TRACE)
1.116 eric 451: HTTrace("HTTPStatus.. ABORTING...\n");
1.80 frystyk 452: return HT_ERROR;
1.71 frystyk 453: }
454:
455: /* HTTPStatus Stream
456: ** -----------------
457: */
1.119 frystyk 458: PRIVATE const HTStreamClass HTTPStatusClass =
1.71 frystyk 459: {
460: "HTTPStatus",
1.80 frystyk 461: HTTPStatus_flush,
1.71 frystyk 462: HTTPStatus_free,
463: HTTPStatus_abort,
464: HTTPStatus_put_character,
465: HTTPStatus_put_string,
466: HTTPStatus_put_block
467: };
468:
1.113 frystyk 469: #if 0
1.100 frystyk 470: PRIVATE HTStream * HTTPStatus_new (HTRequest * request, http_info * http)
1.113 frystyk 471: #endif
472:
473: PUBLIC HTStream * HTTPStatus_new (HTRequest * request,
474: void * param,
475: HTFormat input_format,
476: HTFormat output_format,
477: HTStream * output_stream)
1.71 frystyk 478: {
1.115 frystyk 479: HTStream * me;
480: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
481: HT_OUTOFMEM("HTTPStatus_new");
1.71 frystyk 482: me->isa = &HTTPStatusClass;
1.113 frystyk 483: if (request) {
484: HTNet * net = request->net;
485: http_info * http = (http_info *) net->context; /* Get existing copy */
486: me->request = request;
487: me->http = http;
488: http->next = HTTP_ERROR;
489: me->state = EOL_BEGIN;
490: return me;
491: } else
492: return HTErrorStream();
1.71 frystyk 493: }
494:
495: /* ------------------------------------------------------------------------- */
496:
497: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 498: ** ==============================
499: **
500: ** Given a hypertext address, this routine loads a document.
501: **
502: ** On entry,
503: ** request This is the request structure
1.94 frystyk 504: ** returns HT_ERROR Error has occured in call back
505: ** HT_OK Call back was OK
1.55 frystyk 506: */
1.94 frystyk 507: PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request, SockOps ops)
1.55 frystyk 508: {
1.71 frystyk 509: int status = HT_ERROR;
1.94 frystyk 510: HTNet *net = request->net; /* Generic protocol information */
1.55 frystyk 511: http_info *http; /* Specific protocol information */
1.112 frystyk 512: HTParentAnchor *anchor = HTRequest_anchor(request);
513:
1.94 frystyk 514: /*
515: ** Initiate a new http structure and bind to request structure
516: ** This is actually state HTTP_BEGIN, but it can't be in the state
517: ** machine as we need the structure first.
518: */
519: if (ops == FD_NONE) {
1.116 eric 520: if (PROT_TRACE) HTTrace("HTTP........ Looking for `%s\'\n",
1.112 frystyk 521: HTAnchor_physical(anchor));
1.115 frystyk 522: if ((http = (http_info *) HT_CALLOC(1, sizeof(http_info))) == NULL)
523: HT_OUTOFMEM("HTLoadHTTP");
1.71 frystyk 524: http->state = HTTP_BEGIN;
1.113 frystyk 525: http->next = HTTP_GOT_DATA;
1.94 frystyk 526: net->context = http;
1.98 frystyk 527: } else if (ops == FD_CLOSE) { /* Interrupted */
1.112 frystyk 528: HTRequest_addError(request, ERR_FATAL, NO, HTERR_INTERRUPTED,
529: NULL, 0, "HTLoadHTTP");
530: HTTPCleanup(request, HT_INTERRUPTED);
1.94 frystyk 531: return HT_OK;
532: } else
533: http = (http_info *) net->context; /* Get existing copy */
1.71 frystyk 534:
535: /* Now jump into the machine. We know the state from the previous run */
536: while (1) {
537: switch (http->state) {
538: case HTTP_BEGIN:
539: /*
540: ** Compose authorization information (this was moved here
541: ** from after the making of the connection so that the connection
542: ** wouldn't have to wait while prompting username and password
543: ** from the user). -- AL 13.10.93
544: */
1.117 frystyk 545: if (HTAuth_generate(request)) {
546: if (PROT_TRACE)HTTrace("HTTP........ Credentials generated\n");
547: http->state = HTTP_NEED_CONNECTION;
548: } else {
549: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
550: NULL, 0, "HTLoadHTTP");
551: http->state = HTTP_ERROR;
1.71 frystyk 552: }
553: break;
554:
555: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
1.112 frystyk 556: status = HTDoConnect(net, HTAnchor_physical(anchor),
1.95 frystyk 557: HTTP_PORT);
1.80 frystyk 558: if (status == HT_OK) {
1.95 frystyk 559:
560: /* Check the protocol class */
1.97 frystyk 561: char *s_class = HTDNS_serverClass(net->dns);
562: if (s_class && strcasecomp(s_class, "http")) {
1.104 frystyk 563: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
1.95 frystyk 564: NULL, 0, "HTLoadHTTP");
565: http->state = HTTP_ERROR;
566: break;
567: }
568: HTDNS_setServerClass(net->dns, "http");
569:
1.71 frystyk 570: if (PROT_TRACE)
1.116 eric 571: HTTrace("HTTP........ Connected, socket %d\n",
1.94 frystyk 572: net->sockfd);
1.80 frystyk 573:
1.113 frystyk 574: /* Set up stream TO network. If we include a data object in
575: ** the request then add a MIME stream
576: */
577: request->input_stream = HTMethod_hasEntity(request->method) ?
578: HTMIMERequest_new(request, HTTPRequest_new(request, HTBufWriter_new(net, YES, 512), NO), YES) :
1.118 frystyk 579: HTTPRequest_new(request, HTBufWriter_new(net,YES,512), YES);
1.88 frystyk 580:
581: /*
582: ** Set up concurrent read/write if this request isn't the
583: ** source for a PUT or POST. As source we don't start reading
584: ** before all destinations are ready. If destination then
585: ** register the input stream and get ready for read
586: */
1.112 frystyk 587: if (HTRequest_isDestination(request)) {
1.94 frystyk 588: HTEvent_Register(net->sockfd, request, (SockOps) FD_READ,
589: HTLoadHTTP, net->priority);
1.88 frystyk 590: HTRequest_linkDestination(request);
591: }
592:
1.121 frystyk 593: /* Set up stream FROM network */
594: #if 1
1.113 frystyk 595: net->target=HTStreamStack(WWW_HTTP, request->output_format,
596: request->output_stream, request, NO);
1.121 frystyk 597: #else
598: {
599: HTStream * target = HTStreamStack(WWW_HTTP,
600: request->output_format,
601: request->output_stream,
602: request, NO);
603: HTNet_setTarget(net, target);
604: }
1.113 frystyk 605: #endif
1.71 frystyk 606: http->state = HTTP_NEED_REQUEST;
1.96 frystyk 607: } else if (status == HT_WOULD_BLOCK || status == HT_PERSISTENT)
1.94 frystyk 608: return HT_OK;
1.71 frystyk 609: else
610: http->state = HTTP_ERROR; /* Error or interrupt */
611: break;
612:
1.87 frystyk 613: /* As we can do simultanous read and write this is now one state */
1.80 frystyk 614: case HTTP_NEED_REQUEST:
1.94 frystyk 615: if (ops == FD_WRITE || ops == FD_NONE) {
1.88 frystyk 616: if (HTRequest_isDestination(request)) {
1.94 frystyk 617: HTNet *srcnet = request->source->net;
1.112 frystyk 618: if (srcnet) {
619: HTEvent_Register(srcnet->sockfd, request->source,
620: (SockOps) FD_READ,
621: srcnet->cbf, srcnet->priority);
622: HTEvent_UnRegister(net->sockfd, FD_WRITE);
623: }
1.94 frystyk 624: return HT_OK;
1.80 frystyk 625: }
1.101 frystyk 626: status = request->PostCallback ?
627: request->PostCallback(request, request->input_stream) :
1.88 frystyk 628: (*request->input_stream->isa->flush)(request->input_stream);
1.71 frystyk 629: if (status == HT_WOULD_BLOCK)
1.94 frystyk 630: return HT_OK;
631: else
632: ops = FD_READ; /* Trick to ensure that we do READ */
633: } else if (ops == FD_READ) {
1.121 frystyk 634: status = HTChannel_readSocket(request, net);
1.80 frystyk 635: if (status == HT_WOULD_BLOCK)
1.94 frystyk 636: return HT_OK;
1.113 frystyk 637: else if (status==HT_LOADED || status==HT_CLOSED)
1.94 frystyk 638: http->state = http->next; /* Jump to next state */
639: else
640: http->state = HTTP_ERROR;
1.90 frystyk 641: } else {
1.78 frystyk 642: http->state = HTTP_ERROR;
1.90 frystyk 643: }
1.71 frystyk 644: break;
1.80 frystyk 645:
1.91 frystyk 646: case HTTP_NOT_MODIFIED:
647: http->state = HTTP_ERROR;
648: break;
649:
1.112 frystyk 650: case HTTP_PERM_REDIRECT:
651: if (HTRequest_isPostWeb(request)) {
652: if (HTRequest_isDestination(request)) {
653: HTLink *link =
654: HTAnchor_findLink((HTAnchor *) request->source->anchor,
655: (HTAnchor *) anchor);
656: HTLink_setResult(link, HT_LINK_ERROR);
657: }
1.88 frystyk 658: HTRequest_killPostWeb(request);
1.112 frystyk 659: }
660: HTTPCleanup(request, HT_PERM_REDIRECT);
661: return HT_OK;
662: break;
663:
1.88 frystyk 664:
1.112 frystyk 665: case HTTP_TEMP_REDIRECT:
666: if (HTRequest_isPostWeb(request)) {
667: if (HTRequest_isDestination(request)) {
668: HTLink *link =
669: HTAnchor_findLink((HTAnchor *) request->source->anchor,
670: (HTAnchor *) anchor);
671: HTLink_setResult(link, HT_LINK_ERROR);
1.58 frystyk 672: }
1.112 frystyk 673: HTRequest_killPostWeb(request);
1.71 frystyk 674: }
1.112 frystyk 675: HTTPCleanup(request, HT_TEMP_REDIRECT);
676: return HT_OK;
1.71 frystyk 677: break;
1.112 frystyk 678:
1.71 frystyk 679: case HTTP_AA:
1.112 frystyk 680: if (HTRequest_isPostWeb(request)) {
681: if (HTRequest_isDestination(request)) {
682: HTLink *link =
683: HTAnchor_findLink((HTAnchor *) request->source->anchor,
684: (HTAnchor *) anchor);
685: HTLink_setResult(link, HT_LINK_ERROR);
686: }
1.88 frystyk 687: HTRequest_killPostWeb(request);
1.71 frystyk 688: }
1.112 frystyk 689: HTTPCleanup(request, HT_NO_ACCESS);
690: return HT_OK;
1.71 frystyk 691: break;
1.112 frystyk 692:
1.71 frystyk 693: case HTTP_GOT_DATA:
1.88 frystyk 694: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 695: if (HTRequest_isDestination(request)) {
696: HTLink *link =
697: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 698: (HTAnchor *) anchor);
1.109 frystyk 699: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 700: }
1.112 frystyk 701: }
702: HTTPCleanup(request, HT_LOADED);
1.94 frystyk 703: return HT_OK;
1.71 frystyk 704: break;
705:
706: case HTTP_NO_DATA:
1.88 frystyk 707: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 708: if (HTRequest_isDestination(request)) {
709: HTLink *link =
710: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 711: (HTAnchor *) anchor);
1.109 frystyk 712: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 713: }
1.112 frystyk 714: }
715: HTTPCleanup(request, HT_NO_DATA);
1.94 frystyk 716: return HT_OK;
1.71 frystyk 717: break;
1.80 frystyk 718:
1.94 frystyk 719: case HTTP_RETRY:
1.88 frystyk 720: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 721: if (HTRequest_isDestination(request)) {
722: HTLink *link =
723: HTAnchor_findLink((HTAnchor*) request->source->anchor,
1.112 frystyk 724: (HTAnchor*) anchor);
1.109 frystyk 725: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 726: }
1.112 frystyk 727: HTRequest_killPostWeb(request);
728: }
729: HTTPCleanup(request, HT_RETRY);
1.94 frystyk 730: return HT_OK;
1.81 frystyk 731: break;
732:
1.71 frystyk 733: case HTTP_ERROR:
1.88 frystyk 734: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 735: if (HTRequest_isDestination(request)) {
736: HTLink *link =
737: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 738: (HTAnchor *) anchor);
1.109 frystyk 739: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 740: }
1.112 frystyk 741: HTRequest_killPostWeb(request);
742: }
1.120 eric 743: HTTPCleanup(request, status);
1.94 frystyk 744: return HT_OK;
1.71 frystyk 745: break;
746: }
747: } /* End of while(1) */
748: }
1.88 frystyk 749:
1.21 luotonen 750:
Webmaster