Annotation of libwww/Library/src/HTTP.c, revision 1.120
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.
6: **
7: ** This module implments the HTTP protocol as a state machine
1.55 frystyk 8: **
9: ** History:
1.59 frystyk 10: ** < May 24 94 ?? Unknown - but obviously written
1.56 frystyk 11: ** May 24 94 HF Made reentrent and cleaned up a bit. Implemented
12: ** Forward, redirection, error handling and referer field
1.67 duns 13: ** 8 Jul 94 FM Insulate free() from _free structure element.
1.71 frystyk 14: ** Jul 94 HFN Written on top of HTTP.c, Henrik Frystyk
1.55 frystyk 15: **
1.1 timbl 16: */
17:
1.78 frystyk 18: /* Library include files */
1.119 frystyk 19: #include "sysdep.h"
1.1 timbl 20: #include "HTUtils.h"
1.78 frystyk 21: #include "HTString.h"
1.71 frystyk 22: #include "HTParse.h"
1.1 timbl 23: #include "HTTCP.h"
24: #include "HTFormat.h"
1.85 frystyk 25: #include "HTSocket.h"
1.94 frystyk 26: #include "HTReqMan.h"
1.2 timbl 27: #include "HTAlert.h"
1.14 luotonen 28: #include "HTAABrow.h" /* Access Authorization */
1.20 timbl 29: #include "HTTee.h" /* Tee off a cache stream */
1.78 frystyk 30: #include "HTFWrite.h" /* Write to cache file */
1.90 frystyk 31: #include "HTCache.h"
1.80 frystyk 32: #include "HTWriter.h"
1.54 luotonen 33: #include "HTError.h"
1.94 frystyk 34: #include "HTAccess.h"
1.55 frystyk 35: #include "HTChunk.h"
1.105 frystyk 36: #include "HTWWWStr.h"
1.95 frystyk 37: #include "HTNetMan.h"
1.109 frystyk 38: #include "HTTPUtil.h"
1.113 frystyk 39: #include "HTMIMERq.h"
1.80 frystyk 40: #include "HTTPReq.h"
1.55 frystyk 41: #include "HTTP.h" /* Implements */
42:
43: /* Macros and other defines */
1.94 frystyk 44: #ifndef HTTP_PORT
45: #define HTTP_PORT 80 /* Allocated to http by Jon Postel/ISI 24-Jan-92 */
46: #endif
47:
1.71 frystyk 48: #define PUTC(c) (*me->target->isa->put_character)(me->target, c)
49: #define PUTS(s) (*me->target->isa->put_string)(me->target, s)
50: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
51: #define FREE_TARGET (*me->target->isa->_free)(me->target)
1.74 frystyk 52: #define ABORT_TARGET (*me->target->isa->abort)(me->target, e)
1.2 timbl 53:
1.59 frystyk 54: /* Type definitions and global variables etc. local to this module */
1.94 frystyk 55:
56: /* Final states have negative value */
1.59 frystyk 57: typedef enum _HTTPState {
1.81 frystyk 58: HTTP_RETRY = -4,
1.71 frystyk 59: HTTP_ERROR = -3,
60: HTTP_NO_DATA = -2,
61: HTTP_GOT_DATA = -1,
62: HTTP_BEGIN = 0,
63: HTTP_NEED_CONNECTION,
64: HTTP_NEED_REQUEST,
1.112 frystyk 65: HTTP_PERM_REDIRECT,
66: HTTP_TEMP_REDIRECT,
1.91 frystyk 67: HTTP_NOT_MODIFIED,
1.71 frystyk 68: HTTP_AA
1.59 frystyk 69: } HTTPState;
1.55 frystyk 70:
1.94 frystyk 71: /* This is the context structure for the this module */
1.55 frystyk 72: typedef struct _http_info {
1.81 frystyk 73: HTTPState state; /* Current State of the connection */
74: HTTPState next; /* Next state */
1.55 frystyk 75: } http_info;
76:
1.88 frystyk 77: #define MAX_STATUS_LEN 100 /* Max nb of chars to check StatusLine */
1.55 frystyk 78:
1.71 frystyk 79: struct _HTStream {
1.119 frystyk 80: const HTStreamClass * isa;
1.71 frystyk 81: HTStream * target;
82: HTRequest * request;
83: http_info * http;
84: HTSocketEOL state;
85: BOOL transparent;
1.81 frystyk 86: char * version; /* Should we save this? */
1.71 frystyk 87: int status;
1.81 frystyk 88: char * reason;
1.71 frystyk 89: char buffer[MAX_STATUS_LEN+1];
1.80 frystyk 90: int buflen;
1.71 frystyk 91: };
1.21 luotonen 92:
1.71 frystyk 93: /* ------------------------------------------------------------------------- */
94: /* Help Functions */
95: /* ------------------------------------------------------------------------- */
1.21 luotonen 96:
1.94 frystyk 97: /* HTTPCleanup
98: ** -----------
1.55 frystyk 99: ** This function closes the connection and frees memory.
1.94 frystyk 100: ** Returns YES on OK, else NO
1.1 timbl 101: */
1.94 frystyk 102: PRIVATE int HTTPCleanup (HTRequest *req, int status)
1.1 timbl 103: {
1.94 frystyk 104: HTNet *net = req->net;
105: http_info *http = (http_info *) net->context;
1.80 frystyk 106:
1.94 frystyk 107: /* Free stream with data TO network */
1.112 frystyk 108: if (HTRequest_isDestination(req))
109: HTRequest_removeDestination(req);
110: else if (req->input_stream) {
1.94 frystyk 111: if (status == HT_INTERRUPTED)
112: (*req->input_stream->isa->abort)(req->input_stream, NULL);
113: else
114: (*req->input_stream->isa->_free)(req->input_stream);
1.104 frystyk 115: req->input_stream = NULL;
1.94 frystyk 116: }
1.88 frystyk 117:
1.112 frystyk 118: /* Free user part of stream pipe if error */
119: if (!net->target && req->output_stream)
120: (*req->output_stream->isa->abort)(req->output_stream, NULL);
121:
1.94 frystyk 122: /* Remove the request object and our own context structure for http */
1.112 frystyk 123: HTNet_delete(net, req->internal ? HT_IGNORE : status);
1.115 frystyk 124: HT_FREE(http);
1.94 frystyk 125: return YES;
1.55 frystyk 126: }
127:
1.71 frystyk 128: /*
129: ** This is a big switch handling all HTTP return codes. It puts in any
130: ** appropiate error message and decides whether we should expect data
1.78 frystyk 131: ** or not.
1.55 frystyk 132: */
1.100 frystyk 133: PRIVATE void HTTPNextState (HTStream * me)
1.55 frystyk 134: {
1.71 frystyk 135: switch (me->status) {
136:
1.78 frystyk 137: case 0: /* 0.9 response */
138: case 200:
1.112 frystyk 139: me->http->next = HTTP_GOT_DATA;
140: break;
141:
1.78 frystyk 142: case 201:
1.112 frystyk 143: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CREATED,
144: me->reason, (int) strlen(me->reason),
145: "HTTPNextState");
146: me->http->next = HTTP_GOT_DATA;
147: break;
148:
1.78 frystyk 149: case 202:
1.112 frystyk 150: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_ACCEPTED,
151: me->reason, (int) strlen(me->reason),
152: "HTTPNextState");
153: me->http->next = HTTP_GOT_DATA;
154: break;
155:
1.78 frystyk 156: case 203:
1.112 frystyk 157: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PARTIAL,
158: me->reason, (int) strlen(me->reason),
159: "HTTPNextState");
1.81 frystyk 160: me->http->next = HTTP_GOT_DATA;
1.71 frystyk 161: break;
1.78 frystyk 162:
163: case 204: /* No Response */
1.112 frystyk 164: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NO_CONTENT,
165: me->reason, (int) strlen(me->reason),
166: "HTTPNextState");
1.81 frystyk 167: me->http->next = HTTP_NO_DATA;
1.71 frystyk 168: break;
1.78 frystyk 169:
1.71 frystyk 170: case 301: /* Moved */
1.112 frystyk 171: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MOVED,
172: me->reason, (int) strlen(me->reason),
173: "HTTPNextState");
174: me->http->next = HTTP_PERM_REDIRECT;
175: break;
176:
1.71 frystyk 177: case 302: /* Found */
1.112 frystyk 178: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_FOUND,
179: me->reason, (int) strlen(me->reason),
180: "HTTPNextState");
181: me->http->next = HTTP_TEMP_REDIRECT;
1.71 frystyk 182: break;
1.55 frystyk 183:
1.71 frystyk 184: case 303: /* Method */
1.107 frystyk 185: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
186: me->reason, (int) strlen(me->reason),
187: "HTTPNextState");
1.81 frystyk 188: me->http->next = HTTP_ERROR;
1.71 frystyk 189: break;
1.91 frystyk 190:
191: case 304: /* Not Modified */
1.112 frystyk 192: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_MODIFIED,
193: me->reason, (int) strlen(me->reason),
194: "HTTPNextState");
1.91 frystyk 195: me->http->next = HTTP_NOT_MODIFIED;
196: break;
1.55 frystyk 197:
1.78 frystyk 198: case 400: /* Bad Request */
1.104 frystyk 199: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
1.100 frystyk 200: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 201: me->http->next = HTTP_ERROR;
1.71 frystyk 202: break;
1.70 howcome 203:
1.71 frystyk 204: case 401:
1.104 frystyk 205: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.100 frystyk 206: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 207: me->http->next = HTTP_AA;
1.71 frystyk 208: break;
209:
210: case 402: /* Payment required */
1.104 frystyk 211: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
1.100 frystyk 212: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 213: me->http->next = HTTP_ERROR;
1.71 frystyk 214: break;
1.55 frystyk 215:
1.71 frystyk 216: case 403: /* Forbidden */
1.104 frystyk 217: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
1.100 frystyk 218: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 219: me->http->next = HTTP_ERROR;
1.71 frystyk 220: break;
1.55 frystyk 221:
1.71 frystyk 222: case 404: /* Not Found */
1.104 frystyk 223: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
1.100 frystyk 224: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 225: me->http->next = HTTP_ERROR;
1.71 frystyk 226: break;
227:
1.78 frystyk 228: case 405: /* Not Allowed */
1.104 frystyk 229: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
1.100 frystyk 230: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 231: me->http->next = HTTP_ERROR;
1.78 frystyk 232: break;
233:
234: case 406: /* None Acceptable */
1.104 frystyk 235: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
1.100 frystyk 236: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 237: me->http->next = HTTP_ERROR;
1.78 frystyk 238: break;
239:
240: case 407: /* Proxy Authentication Required */
1.104 frystyk 241: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PROXY,
1.100 frystyk 242: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 243: me->http->next = HTTP_ERROR;
1.78 frystyk 244: break;
245:
246: case 408: /* Request Timeout */
1.104 frystyk 247: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
1.100 frystyk 248: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 249: me->http->next = HTTP_ERROR;
1.78 frystyk 250: break;
251:
1.71 frystyk 252: case 500:
1.104 frystyk 253: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
1.100 frystyk 254: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 255: me->http->next = HTTP_ERROR;
1.78 frystyk 256: break;
257:
1.71 frystyk 258: case 501:
1.104 frystyk 259: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
1.100 frystyk 260: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 261: me->http->next = HTTP_ERROR;
1.78 frystyk 262: break;
263:
264: case 502:
1.104 frystyk 265: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
1.100 frystyk 266: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 267: me->http->next = HTTP_ERROR;
1.78 frystyk 268: break;
269:
270: case 503:
1.104 frystyk 271: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_DOWN,
1.100 frystyk 272: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 273:
274: /* If Retry-After header is found then return HT_RETRY else HT_ERROR */
275: if (me->request->retry_after)
276: me->http->next = HTTP_RETRY;
277: else
278: me->http->next = HTTP_ERROR;
1.78 frystyk 279: break;
280:
281: case 504:
1.104 frystyk 282: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
1.100 frystyk 283: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.81 frystyk 284: me->http->next = HTTP_ERROR;
1.71 frystyk 285: break;
1.78 frystyk 286:
1.71 frystyk 287: default: /* bad number */
1.104 frystyk 288: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.100 frystyk 289: (void *) me->buffer, me->buflen, "HTTPNextState");
1.81 frystyk 290: me->http->next = HTTP_ERROR;
1.71 frystyk 291: break;
1.55 frystyk 292: }
293: }
294:
1.71 frystyk 295: /* ------------------------------------------------------------------------- */
296: /* HTTP Status Line Stream */
297: /* ------------------------------------------------------------------------- */
1.55 frystyk 298:
1.71 frystyk 299: /*
1.80 frystyk 300: ** Analyse the stream we have read. If it is a HTTP 1.0 or higher
1.71 frystyk 301: ** then create a MIME-stream, else create a Guess stream to find out
302: ** what the 0.9 server is sending. We need to copy the buffer as we don't
303: ** know if we can modify the contents or not.
1.78 frystyk 304: **
305: ** Stream handling is a function of the status code returned from the
306: ** server:
307: ** 200: Use `output_stream' in HTRequest structure
1.94 frystyk 308: ** else: Use `debug_stream' in HTRequest structure
1.80 frystyk 309: **
310: ** Return: YES if buffer should be written out. NO otherwise
1.56 frystyk 311: */
1.100 frystyk 312: PRIVATE int stream_pipe (HTStream * me)
1.56 frystyk 313: {
1.71 frystyk 314: HTRequest *req = me->request;
1.95 frystyk 315: HTNet *net = req->net;
1.80 frystyk 316: if (me->target) {
317: int status = PUTBLOCK(me->buffer, me->buflen);
318: if (status == HT_OK)
319: me->transparent = YES;
320: return status;
1.88 frystyk 321: } else if (HTRequest_isSource(req) && !req->output_stream) {
322: /*
323: ** We need to wait for the destinations to get ready
324: */
325: return HT_WOULD_BLOCK;
1.80 frystyk 326: }
1.88 frystyk 327:
1.81 frystyk 328: if (strncasecomp(me->buffer, "http/", 5)) {
1.80 frystyk 329: int status;
1.104 frystyk 330: HTRequest_addError(req, ERR_INFO, NO, HTERR_HTTP09,
1.80 frystyk 331: (void *) me->buffer, me->buflen, "HTTPStatusStream");
1.105 frystyk 332: me->target = HTStreamStack(WWW_UNKNOWN, req->output_format,
333: req->output_stream, req, NO);
1.88 frystyk 334: me->http->next = HTTP_GOT_DATA;
1.80 frystyk 335: if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
336: me->transparent = YES;
1.98 frystyk 337: HTDNS_setServerVersion(net->dns, HTTP_09);
1.80 frystyk 338: return status;
339: } else {
1.81 frystyk 340: char *ptr = me->buffer+5; /* Skip the HTTP part */
341: me->version = HTNextField(&ptr);
1.95 frystyk 342:
343: /* here we want to find out when to use persistent connection */
1.98 frystyk 344: HTDNS_setServerVersion(net->dns, HTTP_10);
1.95 frystyk 345:
1.81 frystyk 346: me->status = atoi(HTNextField(&ptr));
347: me->reason = ptr;
348: if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
349: *ptr = '0円';
350: else if ((ptr = strchr(me->reason, '\n')) != NULL)
351: *ptr = '0円';
352:
353: /* Set up the streams */
1.112 frystyk 354: if (me->status==200) {
1.80 frystyk 355: HTStream *s;
1.103 frystyk 356: me->target = HTStreamStack(WWW_MIME, req->output_format,
357: req->output_stream, req, NO);
1.80 frystyk 358:
1.103 frystyk 359: /* howcome: test for return value from HTCacheWriter 12/1/95 */
360: if (req->method==METHOD_GET && HTCache_isEnabled() &&
361: (s = HTCacheWriter(req, NULL, WWW_MIME, req->output_format,
362: req->output_stream))) {
1.113 frystyk 363: me->target = HTTee(me->target, s, NULL);
1.103 frystyk 364: }
1.94 frystyk 365: } else if (req->debug_stream) {
366: me->target = HTStreamStack(WWW_MIME, req->debug_format,
367: req->debug_stream, req, NO);
1.71 frystyk 368: } else {
1.103 frystyk 369: /* We still need to parser the MIME part */
1.114 frystyk 370: me->target = HTStreamStack(WWW_MIME, req->debug_format,
371: req->debug_stream, req, NO);
1.56 frystyk 372: }
373: }
1.113 frystyk 374: if (!me->target) me->target = HTErrorStream();
1.81 frystyk 375: HTTPNextState(me); /* Get next state */
1.80 frystyk 376: me->transparent = YES;
377: return HT_OK;
1.71 frystyk 378: }
1.56 frystyk 379:
1.80 frystyk 380: /*
381: ** Searches for HTTP header line until buffer fills up or a CRLF or LF
382: ** is found
383: */
1.119 frystyk 384: PRIVATE int HTTPStatus_put_block (HTStream * me, const char * b, int l)
1.71 frystyk 385: {
1.80 frystyk 386: while (!me->transparent && l-- > 0) {
387: int status;
388: if (me->target) {
389: if ((status = stream_pipe(me)) != HT_OK)
390: return status;
391: } else {
392: *(me->buffer+me->buflen++) = *b;
393: if (me->state == EOL_FCR) {
394: if (*b == LF) { /* Line found */
395: if ((status = stream_pipe(me)) != HT_OK)
396: return status;
397: } else {
398: me->state = EOL_BEGIN;
399: }
400: } else if (*b == CR) {
401: me->state = EOL_FCR;
402: } else if (*b == LF) {
403: if ((status = stream_pipe(me)) != HT_OK)
404: return status;
1.71 frystyk 405: } else {
1.80 frystyk 406: if (me->buflen >= MAX_STATUS_LEN) {
407: if ((status = stream_pipe(me)) != HT_OK)
408: return status;
409: }
1.71 frystyk 410: }
1.80 frystyk 411: b++;
1.71 frystyk 412: }
1.56 frystyk 413: }
1.99 frystyk 414: if (l > 0) return PUTBLOCK(b, l);
415: return HT_OK;
1.56 frystyk 416: }
417:
1.119 frystyk 418: PRIVATE int HTTPStatus_put_string (HTStream * me, const char * s)
1.71 frystyk 419: {
1.80 frystyk 420: return HTTPStatus_put_block(me, s, (int) strlen(s));
1.71 frystyk 421: }
1.56 frystyk 422:
1.100 frystyk 423: PRIVATE int HTTPStatus_put_character (HTStream * me, char c)
1.71 frystyk 424: {
1.80 frystyk 425: return HTTPStatus_put_block(me, &c, 1);
426: }
427:
1.100 frystyk 428: PRIVATE int HTTPStatus_flush (HTStream * me)
1.80 frystyk 429: {
430: return (*me->target->isa->flush)(me->target);
1.71 frystyk 431: }
432:
1.100 frystyk 433: PRIVATE int HTTPStatus_free (HTStream * me)
1.71 frystyk 434: {
1.87 frystyk 435: int status = HT_OK;
436: if (me->target) {
437: if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
438: return HT_WOULD_BLOCK;
439: }
1.115 frystyk 440: HT_FREE(me);
1.100 frystyk 441: return status;
1.71 frystyk 442: }
443:
1.104 frystyk 444: PRIVATE int HTTPStatus_abort (HTStream * me, HTList * e)
1.71 frystyk 445: {
446: if (me->target)
1.74 frystyk 447: ABORT_TARGET;
1.115 frystyk 448: HT_FREE(me);
1.74 frystyk 449: if (PROT_TRACE)
1.116 eric 450: HTTrace("HTTPStatus.. ABORTING...\n");
1.80 frystyk 451: return HT_ERROR;
1.71 frystyk 452: }
453:
454: /* HTTPStatus Stream
455: ** -----------------
456: */
1.119 frystyk 457: PRIVATE const HTStreamClass HTTPStatusClass =
1.71 frystyk 458: {
459: "HTTPStatus",
1.80 frystyk 460: HTTPStatus_flush,
1.71 frystyk 461: HTTPStatus_free,
462: HTTPStatus_abort,
463: HTTPStatus_put_character,
464: HTTPStatus_put_string,
465: HTTPStatus_put_block
466: };
467:
1.113 frystyk 468: #if 0
1.100 frystyk 469: PRIVATE HTStream * HTTPStatus_new (HTRequest * request, http_info * http)
1.113 frystyk 470: #endif
471:
472: PUBLIC HTStream * HTTPStatus_new (HTRequest * request,
473: void * param,
474: HTFormat input_format,
475: HTFormat output_format,
476: HTStream * output_stream)
1.71 frystyk 477: {
1.115 frystyk 478: HTStream * me;
479: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
480: HT_OUTOFMEM("HTTPStatus_new");
1.71 frystyk 481: me->isa = &HTTPStatusClass;
1.113 frystyk 482: if (request) {
483: HTNet * net = request->net;
484: http_info * http = (http_info *) net->context; /* Get existing copy */
485: me->request = request;
486: me->http = http;
487: http->next = HTTP_ERROR;
488: me->state = EOL_BEGIN;
489: return me;
490: } else
491: return HTErrorStream();
1.71 frystyk 492: }
493:
494: /* ------------------------------------------------------------------------- */
495:
496: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 497: ** ==============================
498: **
499: ** Given a hypertext address, this routine loads a document.
500: **
501: ** On entry,
502: ** request This is the request structure
1.94 frystyk 503: ** returns HT_ERROR Error has occured in call back
504: ** HT_OK Call back was OK
1.55 frystyk 505: */
1.94 frystyk 506: PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request, SockOps ops)
1.55 frystyk 507: {
1.71 frystyk 508: int status = HT_ERROR;
1.94 frystyk 509: HTNet *net = request->net; /* Generic protocol information */
1.55 frystyk 510: http_info *http; /* Specific protocol information */
1.112 frystyk 511: HTParentAnchor *anchor = HTRequest_anchor(request);
512:
1.94 frystyk 513: /*
514: ** Initiate a new http structure and bind to request structure
515: ** This is actually state HTTP_BEGIN, but it can't be in the state
516: ** machine as we need the structure first.
517: */
518: if (ops == FD_NONE) {
1.116 eric 519: if (PROT_TRACE) HTTrace("HTTP........ Looking for `%s\'\n",
1.112 frystyk 520: HTAnchor_physical(anchor));
1.115 frystyk 521: if ((http = (http_info *) HT_CALLOC(1, sizeof(http_info))) == NULL)
522: HT_OUTOFMEM("HTLoadHTTP");
1.71 frystyk 523: http->state = HTTP_BEGIN;
1.113 frystyk 524: http->next = HTTP_GOT_DATA;
1.94 frystyk 525: net->context = http;
1.98 frystyk 526: } else if (ops == FD_CLOSE) { /* Interrupted */
1.112 frystyk 527: HTRequest_addError(request, ERR_FATAL, NO, HTERR_INTERRUPTED,
528: NULL, 0, "HTLoadHTTP");
529: HTTPCleanup(request, HT_INTERRUPTED);
1.94 frystyk 530: return HT_OK;
531: } else
532: http = (http_info *) net->context; /* Get existing copy */
1.71 frystyk 533:
534: /* Now jump into the machine. We know the state from the previous run */
535: while (1) {
536: switch (http->state) {
537: case HTTP_BEGIN:
538: /*
539: ** Compose authorization information (this was moved here
540: ** from after the making of the connection so that the connection
541: ** wouldn't have to wait while prompting username and password
542: ** from the user). -- AL 13.10.93
543: */
1.117 frystyk 544: if (HTAuth_generate(request)) {
545: if (PROT_TRACE)HTTrace("HTTP........ Credentials generated\n");
546: http->state = HTTP_NEED_CONNECTION;
547: } else {
548: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
549: NULL, 0, "HTLoadHTTP");
550: http->state = HTTP_ERROR;
1.71 frystyk 551: }
552: break;
553:
554: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
1.112 frystyk 555: status = HTDoConnect(net, HTAnchor_physical(anchor),
1.95 frystyk 556: HTTP_PORT);
1.80 frystyk 557: if (status == HT_OK) {
1.95 frystyk 558:
559: /* Check the protocol class */
1.97 frystyk 560: char *s_class = HTDNS_serverClass(net->dns);
561: if (s_class && strcasecomp(s_class, "http")) {
1.104 frystyk 562: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
1.95 frystyk 563: NULL, 0, "HTLoadHTTP");
564: http->state = HTTP_ERROR;
565: break;
566: }
567: HTDNS_setServerClass(net->dns, "http");
568:
1.71 frystyk 569: if (PROT_TRACE)
1.116 eric 570: HTTrace("HTTP........ Connected, socket %d\n",
1.94 frystyk 571: net->sockfd);
1.80 frystyk 572:
1.113 frystyk 573: /* Set up stream TO network. If we include a data object in
574: ** the request then add a MIME stream
575: */
576: request->input_stream = HTMethod_hasEntity(request->method) ?
577: HTMIMERequest_new(request, HTTPRequest_new(request, HTBufWriter_new(net, YES, 512), NO), YES) :
1.118 frystyk 578: HTTPRequest_new(request, HTBufWriter_new(net,YES,512), YES);
1.88 frystyk 579:
580: /*
581: ** Set up concurrent read/write if this request isn't the
582: ** source for a PUT or POST. As source we don't start reading
583: ** before all destinations are ready. If destination then
584: ** register the input stream and get ready for read
585: */
1.112 frystyk 586: if (HTRequest_isDestination(request)) {
1.94 frystyk 587: HTEvent_Register(net->sockfd, request, (SockOps) FD_READ,
588: HTLoadHTTP, net->priority);
1.88 frystyk 589: HTRequest_linkDestination(request);
590: }
591:
592: /* Set up stream FROM network and corresponding read buffer */
1.94 frystyk 593: net->isoc = HTInputSocket_new(net->sockfd);
1.113 frystyk 594: net->target=HTStreamStack(WWW_HTTP, request->output_format,
595: request->output_stream, request, NO);
596: #if 0
597: if (request->output_format == WWW_RAW) {
598: net->target = request->output_stream;
599: http->next = HTTP_GOT_DATA;
600: } else
601: net->target = HTTPStatus_new(request, http);
602: #endif
1.88 frystyk 603:
1.71 frystyk 604: http->state = HTTP_NEED_REQUEST;
1.96 frystyk 605: } else if (status == HT_WOULD_BLOCK || status == HT_PERSISTENT)
1.94 frystyk 606: return HT_OK;
1.71 frystyk 607: else
608: http->state = HTTP_ERROR; /* Error or interrupt */
609: break;
610:
1.87 frystyk 611: /* As we can do simultanous read and write this is now one state */
1.80 frystyk 612: case HTTP_NEED_REQUEST:
1.94 frystyk 613: if (ops == FD_WRITE || ops == FD_NONE) {
1.88 frystyk 614: if (HTRequest_isDestination(request)) {
1.94 frystyk 615: HTNet *srcnet = request->source->net;
1.112 frystyk 616: if (srcnet) {
617: HTEvent_Register(srcnet->sockfd, request->source,
618: (SockOps) FD_READ,
619: srcnet->cbf, srcnet->priority);
620: HTEvent_UnRegister(net->sockfd, FD_WRITE);
621: }
1.94 frystyk 622: return HT_OK;
1.80 frystyk 623: }
1.101 frystyk 624: status = request->PostCallback ?
625: request->PostCallback(request, request->input_stream) :
1.88 frystyk 626: (*request->input_stream->isa->flush)(request->input_stream);
1.71 frystyk 627: if (status == HT_WOULD_BLOCK)
1.94 frystyk 628: return HT_OK;
629: else
630: ops = FD_READ; /* Trick to ensure that we do READ */
631: } else if (ops == FD_READ) {
1.98 frystyk 632: status = HTSocketRead(request, net);
1.80 frystyk 633: if (status == HT_WOULD_BLOCK)
1.94 frystyk 634: return HT_OK;
1.113 frystyk 635: else if (status==HT_LOADED || status==HT_CLOSED)
1.94 frystyk 636: http->state = http->next; /* Jump to next state */
637: else
638: http->state = HTTP_ERROR;
1.90 frystyk 639: } else {
1.78 frystyk 640: http->state = HTTP_ERROR;
1.90 frystyk 641: }
1.71 frystyk 642: break;
1.80 frystyk 643:
1.91 frystyk 644: case HTTP_NOT_MODIFIED:
645: http->state = HTTP_ERROR;
646: break;
647:
1.112 frystyk 648: case HTTP_PERM_REDIRECT:
649: if (HTRequest_isPostWeb(request)) {
650: if (HTRequest_isDestination(request)) {
651: HTLink *link =
652: HTAnchor_findLink((HTAnchor *) request->source->anchor,
653: (HTAnchor *) anchor);
654: HTLink_setResult(link, HT_LINK_ERROR);
655: }
1.88 frystyk 656: HTRequest_killPostWeb(request);
1.112 frystyk 657: }
658: HTTPCleanup(request, HT_PERM_REDIRECT);
659: return HT_OK;
660: break;
661:
1.88 frystyk 662:
1.112 frystyk 663: case HTTP_TEMP_REDIRECT:
664: if (HTRequest_isPostWeb(request)) {
665: if (HTRequest_isDestination(request)) {
666: HTLink *link =
667: HTAnchor_findLink((HTAnchor *) request->source->anchor,
668: (HTAnchor *) anchor);
669: HTLink_setResult(link, HT_LINK_ERROR);
1.58 frystyk 670: }
1.112 frystyk 671: HTRequest_killPostWeb(request);
1.71 frystyk 672: }
1.112 frystyk 673: HTTPCleanup(request, HT_TEMP_REDIRECT);
674: return HT_OK;
1.71 frystyk 675: break;
1.112 frystyk 676:
1.71 frystyk 677: case HTTP_AA:
1.112 frystyk 678: if (HTRequest_isPostWeb(request)) {
679: if (HTRequest_isDestination(request)) {
680: HTLink *link =
681: HTAnchor_findLink((HTAnchor *) request->source->anchor,
682: (HTAnchor *) anchor);
683: HTLink_setResult(link, HT_LINK_ERROR);
684: }
1.88 frystyk 685: HTRequest_killPostWeb(request);
1.71 frystyk 686: }
1.112 frystyk 687: HTTPCleanup(request, HT_NO_ACCESS);
688: return HT_OK;
1.71 frystyk 689: break;
1.112 frystyk 690:
1.71 frystyk 691: case HTTP_GOT_DATA:
1.88 frystyk 692: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 693: if (HTRequest_isDestination(request)) {
694: HTLink *link =
695: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 696: (HTAnchor *) anchor);
1.109 frystyk 697: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 698: }
1.112 frystyk 699: }
700: HTTPCleanup(request, HT_LOADED);
1.94 frystyk 701: return HT_OK;
1.71 frystyk 702: break;
703:
704: case HTTP_NO_DATA:
1.88 frystyk 705: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 706: if (HTRequest_isDestination(request)) {
707: HTLink *link =
708: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 709: (HTAnchor *) anchor);
1.109 frystyk 710: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 711: }
1.112 frystyk 712: }
713: HTTPCleanup(request, HT_NO_DATA);
1.94 frystyk 714: return HT_OK;
1.71 frystyk 715: break;
1.80 frystyk 716:
1.94 frystyk 717: case HTTP_RETRY:
1.88 frystyk 718: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 719: if (HTRequest_isDestination(request)) {
720: HTLink *link =
721: HTAnchor_findLink((HTAnchor*) request->source->anchor,
1.112 frystyk 722: (HTAnchor*) anchor);
1.109 frystyk 723: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 724: }
1.112 frystyk 725: HTRequest_killPostWeb(request);
726: }
727: HTTPCleanup(request, HT_RETRY);
1.94 frystyk 728: return HT_OK;
1.81 frystyk 729: break;
730:
1.71 frystyk 731: case HTTP_ERROR:
1.88 frystyk 732: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 733: if (HTRequest_isDestination(request)) {
734: HTLink *link =
735: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1.112 frystyk 736: (HTAnchor *) anchor);
1.109 frystyk 737: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 738: }
1.112 frystyk 739: HTRequest_killPostWeb(request);
740: }
1.120 ! eric 741: HTTPCleanup(request, status);
1.94 frystyk 742: return HT_OK;
1.71 frystyk 743: break;
744: }
745: } /* End of while(1) */
746: }
1.88 frystyk 747:
1.21 luotonen 748:
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