Annotation of libwww/Library/src/HTTP.c, revision 1.110
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 */
19: #include "tcp.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"
1.80 frystyk 39: #include "HTTPReq.h"
1.55 frystyk 40: #include "HTTP.h" /* Implements */
41:
42: /* Macros and other defines */
1.94 frystyk 43: #ifndef HTTP_PORT
44: #define HTTP_PORT 80 /* Allocated to http by Jon Postel/ISI 24-Jan-92 */
45: #endif
46:
1.71 frystyk 47: #define PUTC(c) (*me->target->isa->put_character)(me->target, c)
48: #define PUTS(s) (*me->target->isa->put_string)(me->target, s)
49: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
50: #define FREE_TARGET (*me->target->isa->_free)(me->target)
1.74 frystyk 51: #define ABORT_TARGET (*me->target->isa->abort)(me->target, e)
1.2 timbl 52:
1.59 frystyk 53: /* Type definitions and global variables etc. local to this module */
1.94 frystyk 54:
55: /* Final states have negative value */
1.59 frystyk 56: typedef enum _HTTPState {
1.81 frystyk 57: HTTP_RETRY = -4,
1.71 frystyk 58: HTTP_ERROR = -3,
59: HTTP_NO_DATA = -2,
60: HTTP_GOT_DATA = -1,
61: HTTP_BEGIN = 0,
62: HTTP_NEED_CONNECTION,
63: HTTP_NEED_REQUEST,
64: HTTP_REDIRECTION,
1.91 frystyk 65: HTTP_NOT_MODIFIED,
66: HTTP_EXPIRED,
1.71 frystyk 67: HTTP_AA
1.59 frystyk 68: } HTTPState;
1.55 frystyk 69:
1.94 frystyk 70: /* This is the context structure for the this module */
1.55 frystyk 71: typedef struct _http_info {
1.81 frystyk 72: HTTPState state; /* Current State of the connection */
73: HTTPState next; /* Next state */
1.55 frystyk 74: } http_info;
75:
1.88 frystyk 76: #define MAX_STATUS_LEN 100 /* Max nb of chars to check StatusLine */
1.55 frystyk 77:
1.71 frystyk 78: struct _HTStream {
79: CONST HTStreamClass * isa;
80: HTStream * target;
81: HTRequest * request;
82: http_info * http;
83: HTSocketEOL state;
84: BOOL transparent;
1.81 frystyk 85: char * version; /* Should we save this? */
1.71 frystyk 86: int status;
1.81 frystyk 87: char * reason;
1.71 frystyk 88: char buffer[MAX_STATUS_LEN+1];
1.80 frystyk 89: int buflen;
1.71 frystyk 90: };
1.21 luotonen 91:
1.71 frystyk 92: /* ------------------------------------------------------------------------- */
93: /* Help Functions */
94: /* ------------------------------------------------------------------------- */
1.21 luotonen 95:
1.94 frystyk 96: /* HTTPCleanup
97: ** -----------
1.55 frystyk 98: ** This function closes the connection and frees memory.
1.94 frystyk 99: ** Returns YES on OK, else NO
1.1 timbl 100: */
1.94 frystyk 101: PRIVATE int HTTPCleanup (HTRequest *req, int status)
1.1 timbl 102: {
1.94 frystyk 103: HTNet *net = req->net;
104: http_info *http = (http_info *) net->context;
1.80 frystyk 105:
1.94 frystyk 106: /* Free stream with data TO network */
107: if (!HTRequest_isDestination(req) && req->input_stream) {
108: if (status == HT_INTERRUPTED)
109: (*req->input_stream->isa->abort)(req->input_stream, NULL);
110: else
111: (*req->input_stream->isa->_free)(req->input_stream);
1.104 frystyk 112: req->input_stream = NULL;
1.94 frystyk 113: }
1.88 frystyk 114:
1.94 frystyk 115: /* Remove the request object and our own context structure for http */
116: HTNet_delete(net, status);
117: FREE(http);
118: return YES;
1.55 frystyk 119: }
120:
121:
1.94 frystyk 122: PRIVATE BOOL HTTPAuthentication (HTRequest * request)
1.71 frystyk 123: {
124: HTAAScheme scheme;
125: HTList *valid_schemes = HTList_new();
126: HTAssocList **scheme_specifics = NULL;
1.76 frystyk 127: char *tmplate = NULL;
1.71 frystyk 128:
129: if (request->WWWAAScheme) {
130: if ((scheme = HTAAScheme_enum(request->WWWAAScheme)) != HTAA_UNKNOWN) {
131: HTList_addObject(valid_schemes, (void *) scheme);
132: if (!scheme_specifics) {
133: int i;
134: scheme_specifics = (HTAssocList**)
135: malloc(HTAA_MAX_SCHEMES * sizeof(HTAssocList*));
136: if (!scheme_specifics)
137: outofmem(__FILE__, "HTTPAuthentication");
138: for (i=0; i < HTAA_MAX_SCHEMES; i++)
139: scheme_specifics[i] = NULL;
140: }
141: scheme_specifics[scheme] = HTAA_parseArgList(request->WWWAARealm);
142: } else if (PROT_TRACE) {
1.104 frystyk 143: HTRequest_addError(request, ERR_INFO, NO, HTERR_UNKNOWN_AA,
1.71 frystyk 144: (void *) request->WWWAAScheme, 0, "HTTPAuthentication");
145: return NO;
146: }
147: }
148: if (request->WWWprotection) {
149: if (PROT_TRACE)
1.102 frystyk 150: TTYPrint(TDEST, "Protection template set to `%s'\n",
1.71 frystyk 151: request->WWWprotection);
1.76 frystyk 152: StrAllocCopy(tmplate, request->WWWprotection);
1.71 frystyk 153: }
154: request->valid_schemes = valid_schemes;
155: request->scheme_specifics = scheme_specifics;
1.76 frystyk 156: request->prot_template = tmplate;
1.71 frystyk 157: return YES;
158: }
159:
160:
161: /*
162: ** This is a big switch handling all HTTP return codes. It puts in any
163: ** appropiate error message and decides whether we should expect data
1.78 frystyk 164: ** or not.
1.55 frystyk 165: */
1.100 frystyk 166: PRIVATE void HTTPNextState (HTStream * me)
1.55 frystyk 167: {
1.71 frystyk 168: switch (me->status) {
169:
1.78 frystyk 170: case 0: /* 0.9 response */
171: case 200:
172: case 201:
173: case 202:
174: case 203:
1.81 frystyk 175: me->http->next = HTTP_GOT_DATA;
1.71 frystyk 176: break;
1.78 frystyk 177:
178: case 204: /* No Response */
1.81 frystyk 179: me->http->next = HTTP_NO_DATA;
1.71 frystyk 180: break;
1.78 frystyk 181:
1.71 frystyk 182: case 301: /* Moved */
183: case 302: /* Found */
1.81 frystyk 184: me->http->next = HTTP_REDIRECTION;
1.71 frystyk 185: break;
1.55 frystyk 186:
1.71 frystyk 187: case 303: /* Method */
1.107 frystyk 188: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
189: me->reason, (int) strlen(me->reason),
190: "HTTPNextState");
1.81 frystyk 191: me->http->next = HTTP_ERROR;
1.71 frystyk 192: break;
1.91 frystyk 193:
194: case 304: /* Not Modified */
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 */
1.110 ! frystyk 354: if (me->status==200 && req->method==METHOD_GET) {
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))) {
363: me->target = HTTee(me->target, s);
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 */
1.109 frystyk 370: me->target = HTStreamStack(WWW_MIME, WWW_DEBUG, req->debug_stream,
371: req, NO);
1.56 frystyk 372: }
373: }
1.105 frystyk 374: if (!me->target) me->target = HTBlackHole();
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: */
1.100 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:
1.100 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: }
1.71 frystyk 440: 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;
1.71 frystyk 448: free(me);
1.74 frystyk 449: if (PROT_TRACE)
1.102 frystyk 450: TTYPrint(TDEST, "HTTPStatus.. ABORTING...\n");
1.80 frystyk 451: return HT_ERROR;
1.71 frystyk 452: }
453:
454: /* HTTPStatus Stream
455: ** -----------------
456: */
457: PRIVATE CONST HTStreamClass HTTPStatusClass =
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:
1.100 frystyk 468: PRIVATE HTStream * HTTPStatus_new (HTRequest * request, http_info * http)
1.71 frystyk 469: {
470: HTStream * me = (HTStream *) calloc(1, sizeof(HTStream));
471: if (!me) outofmem(__FILE__, "HTTPStatus_new");
472: me->isa = &HTTPStatusClass;
473: me->request = request;
474: me->http = http;
475: me->state = EOL_BEGIN;
476: return me;
477: }
478:
479: /* ------------------------------------------------------------------------- */
480:
481: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 482: ** ==============================
483: **
484: ** Given a hypertext address, this routine loads a document.
485: **
486: ** On entry,
487: ** request This is the request structure
1.94 frystyk 488: ** returns HT_ERROR Error has occured in call back
489: ** HT_OK Call back was OK
1.55 frystyk 490: */
1.94 frystyk 491: PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request, SockOps ops)
1.55 frystyk 492: {
1.71 frystyk 493: int status = HT_ERROR;
1.94 frystyk 494: HTNet *net = request->net; /* Generic protocol information */
1.55 frystyk 495: http_info *http; /* Specific protocol information */
1.17 timbl 496:
1.94 frystyk 497: /*
498: ** Initiate a new http structure and bind to request structure
499: ** This is actually state HTTP_BEGIN, but it can't be in the state
500: ** machine as we need the structure first.
501: */
502: if (ops == FD_NONE) {
1.102 frystyk 503: if (PROT_TRACE) TTYPrint(TDEST, "HTTP........ Looking for `%s\'\n",
1.94 frystyk 504: HTAnchor_physical(request->anchor));
1.71 frystyk 505: if ((http = (http_info *) calloc(1, sizeof(http_info))) == NULL)
506: outofmem(__FILE__, "HTLoadHTTP");
507: http->state = HTTP_BEGIN;
1.85 frystyk 508: http->next = HTTP_ERROR;
1.94 frystyk 509: net->context = http;
1.98 frystyk 510: } else if (ops == FD_CLOSE) { /* Interrupted */
1.100 frystyk 511: #if 1
512: if (HTRequest_isPostWeb(request))
513: #else
1.94 frystyk 514: if(HTRequest_isPostWeb(request)&&!HTRequest_isMainDestination(request))
1.100 frystyk 515: #endif
1.94 frystyk 516: HTTPCleanup(request, HT_IGNORE);
517: else
518: HTTPCleanup(request, HT_INTERRUPTED);
519: return HT_OK;
520: } else
521: http = (http_info *) net->context; /* Get existing copy */
1.71 frystyk 522:
523: /* Now jump into the machine. We know the state from the previous run */
524: while (1) {
525: switch (http->state) {
526: case HTTP_BEGIN:
527: /*
528: ** Compose authorization information (this was moved here
529: ** from after the making of the connection so that the connection
530: ** wouldn't have to wait while prompting username and password
531: ** from the user). -- AL 13.10.93
532: */
533: HTAA_composeAuth(request);
534: if (PROT_TRACE) {
535: if (request->authorization)
1.102 frystyk 536: TTYPrint(TDEST, "HTTP........ Sending Authorization: %s\n",
1.71 frystyk 537: request->authorization);
538: else
1.102 frystyk 539: TTYPrint(TDEST,
1.71 frystyk 540: "HTTP........ Not sending authorization (yet)\n");
541: }
542: http->state = HTTP_NEED_CONNECTION;
543: break;
544:
545: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
1.94 frystyk 546: status = HTDoConnect(net, HTAnchor_physical(request->anchor),
1.95 frystyk 547: HTTP_PORT);
1.80 frystyk 548: if (status == HT_OK) {
1.95 frystyk 549:
550: /* Check the protocol class */
1.97 frystyk 551: char *s_class = HTDNS_serverClass(net->dns);
552: if (s_class && strcasecomp(s_class, "http")) {
1.104 frystyk 553: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
1.95 frystyk 554: NULL, 0, "HTLoadHTTP");
555: http->state = HTTP_ERROR;
556: break;
557: }
558: HTDNS_setServerClass(net->dns, "http");
559:
1.71 frystyk 560: if (PROT_TRACE)
1.102 frystyk 561: TTYPrint(TDEST, "HTTP........ Connected, socket %d\n",
1.94 frystyk 562: net->sockfd);
1.80 frystyk 563:
1.88 frystyk 564: /* Set up stream TO network */
565: request->input_stream =
1.100 frystyk 566: HTTPRequest_new(request, HTBufWriter_new(net, YES, 512));
1.88 frystyk 567:
568: /*
569: ** Set up concurrent read/write if this request isn't the
570: ** source for a PUT or POST. As source we don't start reading
571: ** before all destinations are ready. If destination then
572: ** register the input stream and get ready for read
573: */
574: if (HTRequest_isPostWeb(request)) {
1.94 frystyk 575: HTEvent_Register(net->sockfd, request, (SockOps) FD_READ,
576: HTLoadHTTP, net->priority);
1.88 frystyk 577: HTRequest_linkDestination(request);
578: }
579:
580: /* Set up stream FROM network and corresponding read buffer */
1.94 frystyk 581: net->isoc = HTInputSocket_new(net->sockfd);
1.88 frystyk 582:
1.105 frystyk 583: /* @@@ USE STREAM STACK @@@ */
584: net->target = HTTPStatus_new(request, http);
1.71 frystyk 585: http->state = HTTP_NEED_REQUEST;
1.96 frystyk 586: } else if (status == HT_WOULD_BLOCK || status == HT_PERSISTENT)
1.94 frystyk 587: return HT_OK;
1.71 frystyk 588: else
589: http->state = HTTP_ERROR; /* Error or interrupt */
590: break;
591:
1.87 frystyk 592: /* As we can do simultanous read and write this is now one state */
1.80 frystyk 593: case HTTP_NEED_REQUEST:
1.94 frystyk 594: if (ops == FD_WRITE || ops == FD_NONE) {
1.88 frystyk 595: if (HTRequest_isDestination(request)) {
1.94 frystyk 596: HTNet *srcnet = request->source->net;
597: HTEvent_Register(srcnet->sockfd, request->source,
598: (SockOps) FD_READ,
1.100 frystyk 599: srcnet->cbf, srcnet->priority);
1.94 frystyk 600: return HT_OK;
1.80 frystyk 601: }
1.101 frystyk 602: status = request->PostCallback ?
603: request->PostCallback(request, request->input_stream) :
1.88 frystyk 604: (*request->input_stream->isa->flush)(request->input_stream);
1.71 frystyk 605: if (status == HT_WOULD_BLOCK)
1.94 frystyk 606: return HT_OK;
607: else
608: ops = FD_READ; /* Trick to ensure that we do READ */
609: } else if (ops == FD_READ) {
1.98 frystyk 610: status = HTSocketRead(request, net);
1.80 frystyk 611: if (status == HT_WOULD_BLOCK)
1.94 frystyk 612: return HT_OK;
613: else if (status == HT_LOADED)
614: http->state = http->next; /* Jump to next state */
1.91 frystyk 615: else if (status == HT_RELOAD)
616: http->state = HTTP_EXPIRED;
1.94 frystyk 617: else
618: http->state = HTTP_ERROR;
1.90 frystyk 619: } else {
1.78 frystyk 620: http->state = HTTP_ERROR;
1.90 frystyk 621: }
1.71 frystyk 622: break;
1.80 frystyk 623:
1.91 frystyk 624: case HTTP_NOT_MODIFIED:
625: http->state = HTTP_ERROR;
626: break;
627:
628: case HTTP_EXPIRED:
1.109 frystyk 629: #if 0
1.91 frystyk 630: /* Dirty hack and fall through */
1.102 frystyk 631: if (PROT_TRACE) TTYPrint(TDEST, "HTTP........ Expired\n");
1.91 frystyk 632: request->redirect = request->anchor->address;
1.109 frystyk 633: #endif
1.91 frystyk 634:
1.80 frystyk 635: case HTTP_REDIRECTION:
1.88 frystyk 636: /* Clean up the other connections or just this one */
637: if (HTRequest_isPostWeb(request))
638: HTRequest_killPostWeb(request);
639: else
1.94 frystyk 640: HTTPCleanup(request, HT_IGNORE);
1.88 frystyk 641:
642: /* If we found a new URL in the response */
1.71 frystyk 643: if (request->redirect) {
644: if (status == 301) {
1.104 frystyk 645: HTRequest_addError(request, ERR_INFO, NO, HTERR_MOVED,
1.71 frystyk 646: (void *) request->redirect,
647: (int) strlen(request->redirect), "HTLoadHTTP");
648: } else if (status == 302) {
1.104 frystyk 649: HTRequest_addError(request, ERR_INFO, NO, HTERR_FOUND,
1.71 frystyk 650: (void *) request->redirect,
651: (int) strlen(request->redirect), "HTLoadHTTP");
1.55 frystyk 652: }
1.88 frystyk 653:
654: /* If we haven't reached the limit for redirection */
1.94 frystyk 655: if (HTRequest_retry(request)) {
1.107 frystyk 656: HTAlertCallback *cbf = HTAlert_find(HT_A_CONFIRM);
1.87 frystyk 657: HTAnchor *anchor = HTAnchor_findAddress(request->redirect);
1.108 frystyk 658:
659: /* Make sure that we don't get this from cache */
660: HTRequest_setReloadMode(request, HT_FORCE_RELOAD);
661:
1.88 frystyk 662: if (HTRequest_isPostWeb(request)) {
663: HTRequest *dest = HTRequest_mainDestination(request);
1.107 frystyk 664: if (cbf && (*cbf)(request, HT_A_CONFIRM, HT_MSG_MOVED,
665: NULL, request->redirect, NULL)) {
1.88 frystyk 666:
667: /* The new anchor inherits the Post Web */
1.91 frystyk 668: HTAnchor_moveAllLinks((HTAnchor *) request->anchor,
669: anchor);
1.88 frystyk 670: if (HTRequest_isSource(request))
671: HTRequest_delete(request);
1.94 frystyk 672: return HTCopyAnchor((HTAnchor *) anchor, dest) ?
673: HT_OK : HT_ERROR;
1.87 frystyk 674: }
1.94 frystyk 675: return HT_OK;
1.101 frystyk 676: } if (request->PostCallback) {
1.87 frystyk 677: #if 0
1.94 frystyk 678: return HTUploadAnchor((HTAnchor*) anchor, request) ?
679: HT_OK : HT_ERROR;
1.87 frystyk 680: #endif
681: } else {
1.94 frystyk 682: return HTLoadAnchor((HTAnchor *) anchor, request) ?
683: HT_OK : HT_ERROR;
1.87 frystyk 684: }
1.71 frystyk 685: } else {
1.106 frystyk 686: HTRequest_addError(request, ERR_FATAL, NO,
687: HTERR_MAX_REDIRECT,NULL,0,"HTLoadHTTP");
1.88 frystyk 688: if (HTRequest_isPostWeb(request)) {
689: BOOL main = HTRequest_isMainDestination(request);
1.91 frystyk 690: if (HTRequest_isDestination(request)) {
691: HTLink *link =
1.106 frystyk 692: HTAnchor_findLink((HTAnchor *)request->source->anchor,
693: (HTAnchor *)request->anchor);
1.109 frystyk 694: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 695: }
1.106 frystyk 696: HTNet_callAfter(request, main ? HT_ERROR : HT_IGNORE);
1.88 frystyk 697: HTRequest_removeDestination(request);
698: }
1.94 frystyk 699: return HT_OK;
1.58 frystyk 700: }
1.71 frystyk 701: } else {
1.104 frystyk 702: HTRequest_addError(request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.71 frystyk 703: NULL, 0, "HTLoadHTTP");
1.94 frystyk 704: return HT_OK;
1.71 frystyk 705: }
706: break;
1.80 frystyk 707:
1.71 frystyk 708: case HTTP_AA:
1.88 frystyk 709: /* Clean up the other connections or just this one */
710: if (HTRequest_isPostWeb(request))
711: HTRequest_killPostWeb(request);
712: else
1.94 frystyk 713: HTTPCleanup(request, HT_IGNORE);
1.88 frystyk 714:
715: /* Ask the user for a UserID and a passwd */
716: if (HTTPAuthentication(request) && HTAA_retryWithAuth(request)) {
1.94 frystyk 717: int ret;
1.108 frystyk 718:
719: /* Make sure that we don't get this from cache */
720: HTRequest_setReloadMode(request, HT_FORCE_RELOAD);
721:
1.88 frystyk 722: if (HTRequest_isPostWeb(request)) {
723: HTRequest *dest = HTRequest_mainDestination(request);
724: HTAnchor_appendMethods(request->anchor, request->method);
1.94 frystyk 725: ret=HTCopyAnchor((HTAnchor*)request->source->anchor, dest);
726: return ret ? HT_OK : HT_ERROR;
1.101 frystyk 727: } else if (request->PostCallback) {
1.85 frystyk 728: #if 0
1.94 frystyk 729: ret = HTUploadAnchor((HTAnchor*) request->anchor,request);
730: return ret ? HT_OK : HT_ERROR;
1.85 frystyk 731: #endif
732: } else {
1.94 frystyk 733: ret = HTLoadAnchor((HTAnchor *) request->anchor, request);
734: return ret ? HT_OK : HT_ERROR;
1.85 frystyk 735: }
1.88 frystyk 736: } else { /* If the guy said no :-( */
1.104 frystyk 737: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.94 frystyk 738: NULL, 0, "HTLoadHTTP");
1.88 frystyk 739: if (HTRequest_isPostWeb(request)) {
740: BOOL main = HTRequest_isMainDestination(request);
1.91 frystyk 741: if (HTRequest_isDestination(request)) {
742: HTLink *link =
743: HTAnchor_findLink((HTAnchor *) request->source->anchor,
744: (HTAnchor *) request->anchor);
1.109 frystyk 745: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 746: }
1.106 frystyk 747: HTNet_callAfter(request, main ? HT_ERROR : HT_IGNORE);
1.88 frystyk 748: HTRequest_removeDestination(request);
749: }
1.94 frystyk 750: return HT_OK;
1.71 frystyk 751: }
752: break;
1.80 frystyk 753:
1.71 frystyk 754: case HTTP_GOT_DATA:
1.88 frystyk 755: if (HTRequest_isPostWeb(request)) {
1.100 frystyk 756: HTTPCleanup(request, HTRequest_isMainDestination(request) ?
757: HT_ERROR : HT_IGNORE);
1.91 frystyk 758: if (HTRequest_isDestination(request)) {
759: HTLink *link =
760: HTAnchor_findLink((HTAnchor *) request->source->anchor,
761: (HTAnchor *) request->anchor);
1.109 frystyk 762: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 763: }
1.88 frystyk 764: HTRequest_removeDestination(request);
1.94 frystyk 765: } else
766: HTTPCleanup(request, HT_LOADED);
767: return HT_OK;
1.71 frystyk 768: break;
769:
770: case HTTP_NO_DATA:
1.88 frystyk 771: if (HTRequest_isPostWeb(request)) {
1.100 frystyk 772: HTTPCleanup(request, HTRequest_isMainDestination(request) ?
773: HT_ERROR : HT_IGNORE);
1.91 frystyk 774: if (HTRequest_isDestination(request)) {
775: HTLink *link =
776: HTAnchor_findLink((HTAnchor *) request->source->anchor,
777: (HTAnchor *) request->anchor);
1.109 frystyk 778: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 779: }
1.88 frystyk 780: HTRequest_removeDestination(request);
1.94 frystyk 781: } else
782: HTTPCleanup(request, HT_NO_DATA);
783: return HT_OK;
1.71 frystyk 784: break;
1.80 frystyk 785:
1.94 frystyk 786: case HTTP_RETRY:
1.88 frystyk 787: if (HTRequest_isPostWeb(request)) {
1.100 frystyk 788: HTTPCleanup(request, HTRequest_isMainDestination(request) ?
789: HT_ERROR : HT_IGNORE);
1.91 frystyk 790: HTRequest_killPostWeb(request);
791: if (HTRequest_isDestination(request)) {
792: HTLink *link =
793: HTAnchor_findLink((HTAnchor*) request->source->anchor,
794: (HTAnchor*) request->anchor);
1.109 frystyk 795: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 796: }
1.88 frystyk 797: HTRequest_removeDestination(request);
1.91 frystyk 798: } else
1.94 frystyk 799: HTTPCleanup(request, HT_RETRY);
800: return HT_OK;
1.81 frystyk 801: break;
802:
1.71 frystyk 803: case HTTP_ERROR:
1.88 frystyk 804: /* Clean up the other connections or just this one */
805: if (HTRequest_isPostWeb(request)) {
1.100 frystyk 806: HTTPCleanup(request, HTRequest_isMainDestination(request) ?
807: HT_ERROR : HT_IGNORE);
1.88 frystyk 808: HTRequest_killPostWeb(request);
1.91 frystyk 809: if (HTRequest_isDestination(request)) {
810: HTLink *link =
811: HTAnchor_findLink((HTAnchor *) request->source->anchor,
812: (HTAnchor *) request->anchor);
1.109 frystyk 813: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 814: }
815: HTRequest_removeDestination(request);
1.88 frystyk 816: } else
1.94 frystyk 817: HTTPCleanup(request, HT_ERROR);
818: return HT_OK;
1.71 frystyk 819: break;
820: }
821: } /* End of while(1) */
822: }
1.88 frystyk 823:
1.21 luotonen 824:
Webmaster