Annotation of libwww/Library/src/HTTP.c, revision 1.140.2.2
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.
1.140.2.2! frystyk 6: ** @(#) $Id: HTTP.c,v 1.140.2.1 1996/10/29 21:27:21 eric Exp $
1.74 frystyk 7: **
8: ** This module implments the HTTP protocol as a state machine
1.55 frystyk 9: **
10: ** History:
1.59 frystyk 11: ** < May 24 94 ?? Unknown - but obviously written
1.56 frystyk 12: ** May 24 94 HF Made reentrent and cleaned up a bit. Implemented
13: ** Forward, redirection, error handling and referer field
1.67 duns 14: ** 8 Jul 94 FM Insulate free() from _free structure element.
1.71 frystyk 15: ** Jul 94 HFN Written on top of HTTP.c, Henrik Frystyk
1.55 frystyk 16: **
1.1 timbl 17: */
18:
1.78 frystyk 19: /* Library include files */
1.119 frystyk 20: #include "sysdep.h"
1.123 frystyk 21: #include "WWWUtil.h"
22: #include "WWWCore.h"
23: #include "WWWMIME.h"
24: #include "WWWStream.h"
1.125 frystyk 25: #include "WWWTrans.h"
1.94 frystyk 26: #include "HTReqMan.h"
1.95 frystyk 27: #include "HTNetMan.h"
1.109 frystyk 28: #include "HTTPUtil.h"
1.80 frystyk 29: #include "HTTPReq.h"
1.55 frystyk 30: #include "HTTP.h" /* Implements */
1.140.2.1 eric 31: #include "HTWatch.h"
1.55 frystyk 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:
1.140 frystyk 44: #define HTTP_DUMP
45:
46: #ifdef HTTP_DUMP
1.139 frystyk 47: #define HTTP_OUTPUT "w3chttp.out"
1.140 frystyk 48: PRIVATE FILE * htfp = NULL;
49: #endif
1.139 frystyk 50:
1.59 frystyk 51: /* Type definitions and global variables etc. local to this module */
1.94 frystyk 52:
53: /* Final states have negative value */
1.59 frystyk 54: typedef enum _HTTPState {
1.134 frystyk 55: HTTP_ERROR = -2,
56: HTTP_OK = -1,
1.71 frystyk 57: HTTP_BEGIN = 0,
58: HTTP_NEED_CONNECTION,
1.140.2.1 eric 59: HTTP_CONNECTED
1.59 frystyk 60: } HTTPState;
1.55 frystyk 61:
1.94 frystyk 62: /* This is the context structure for the this module */
1.55 frystyk 63: typedef struct _http_info {
1.81 frystyk 64: HTTPState state; /* Current State of the connection */
65: HTTPState next; /* Next state */
1.134 frystyk 66: int result; /* Result to report to the after filter */
1.139 frystyk 67: BOOL lock; /* Block for writing */
1.140.2.1 eric 68: HTNet * net;
1.55 frystyk 69: } http_info;
70:
1.88 frystyk 71: #define MAX_STATUS_LEN 100 /* Max nb of chars to check StatusLine */
1.55 frystyk 72:
1.71 frystyk 73: struct _HTStream {
1.119 frystyk 74: const HTStreamClass * isa;
1.71 frystyk 75: HTStream * target;
76: HTRequest * request;
77: http_info * http;
1.121 frystyk 78: HTEOLState state;
1.71 frystyk 79: BOOL transparent;
1.81 frystyk 80: char * version; /* Should we save this? */
1.71 frystyk 81: int status;
1.81 frystyk 82: char * reason;
1.71 frystyk 83: char buffer[MAX_STATUS_LEN+1];
1.80 frystyk 84: int buflen;
1.71 frystyk 85: };
1.21 luotonen 86:
1.123 frystyk 87: struct _HTInputStream {
88: const HTInputStreamClass * isa;
89: };
90:
1.71 frystyk 91: /* ------------------------------------------------------------------------- */
92: /* Help Functions */
93: /* ------------------------------------------------------------------------- */
1.21 luotonen 94:
1.94 frystyk 95: /* HTTPCleanup
96: ** -----------
1.55 frystyk 97: ** This function closes the connection and frees memory.
1.94 frystyk 98: ** Returns YES on OK, else NO
1.1 timbl 99: */
1.94 frystyk 100: PRIVATE int HTTPCleanup (HTRequest *req, int status)
1.1 timbl 101: {
1.126 frystyk 102: HTNet * net = HTRequest_net(req);
103: http_info * http = (http_info *) HTNet_context(net);
104: HTStream * input = HTRequest_inputStream(req);
1.80 frystyk 105:
1.94 frystyk 106: /* Free stream with data TO network */
1.112 frystyk 107: if (HTRequest_isDestination(req))
108: HTRequest_removeDestination(req);
1.126 frystyk 109: else if (input) {
1.94 frystyk 110: if (status == HT_INTERRUPTED)
1.126 frystyk 111: (*input->isa->abort)(input, NULL);
1.94 frystyk 112: else
1.126 frystyk 113: (*input->isa->_free)(input);
114: HTRequest_setInputStream(req, NULL);
1.94 frystyk 115: }
1.88 frystyk 116:
1.140 frystyk 117: #ifdef HTTP_DUMP
118: if (htfp) {
119: fclose(htfp);
120: htfp = NULL;
121: }
122: #endif
123:
1.94 frystyk 124: /* Remove the request object and our own context structure for http */
1.133 frystyk 125: HT_FREE(http);
126: HTNet_setContext(net, NULL);
1.131 frystyk 127: HTNet_delete(net, status);
1.94 frystyk 128: return YES;
1.55 frystyk 129: }
130:
1.71 frystyk 131: /*
1.130 frystyk 132: ** Informational 1xx codes are handled separately
1.136 frystyk 133: ** Returns YES if we should continue, NO if we should stop
1.55 frystyk 134: */
1.130 frystyk 135: PRIVATE BOOL HTTPInformation (HTStream * me)
1.55 frystyk 136: {
1.136 frystyk 137: http_info * http = me->http;
1.71 frystyk 138: switch (me->status) {
139:
1.136 frystyk 140: case 100:
141: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CONTINUE,
142: me->reason, (int) strlen(me->reason),
143: "HTTPInformation");
144: return YES;
145: break;
146:
1.130 frystyk 147: case 101:
1.136 frystyk 148: /*
149: ** We consider 101 Switching as a final state and exit this request
150: */
1.130 frystyk 151: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_SWITCHING,
1.127 frystyk 152: me->reason, (int) strlen(me->reason),
1.130 frystyk 153: "HTTPInformation");
1.136 frystyk 154: http->next = HTTP_OK;
155: http->result = HT_UPGRADE;
1.127 frystyk 156: break;
157:
1.130 frystyk 158: default:
1.136 frystyk 159: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
160: (void *) me->buffer, me->buflen, "HTTPNextState");
161: http->next = HTTP_ERROR;
162: http->result = HT_ERROR;
1.127 frystyk 163: break;
1.130 frystyk 164: }
1.136 frystyk 165: return NO;
1.130 frystyk 166: }
167:
168: /*
169: ** This is a big switch handling all HTTP return codes. It puts in any
170: ** appropiate error message and decides whether we should expect data
171: ** or not.
172: */
173: PRIVATE void HTTPNextState (HTStream * me)
174: {
1.134 frystyk 175: http_info * http = me->http;
1.130 frystyk 176: switch (me->status) {
1.127 frystyk 177:
1.78 frystyk 178: case 0: /* 0.9 response */
1.127 frystyk 179: case 200: /* OK */
180: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_OK,
181: me->reason, (int) strlen(me->reason),
182: "HTTPNextState");
1.134 frystyk 183: http->next = HTTP_OK;
184: http->result = HT_LOADED;
1.112 frystyk 185: break;
186:
1.127 frystyk 187: case 201: /* Created */
1.112 frystyk 188: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_CREATED,
189: me->reason, (int) strlen(me->reason),
190: "HTTPNextState");
1.134 frystyk 191: http->next = HTTP_OK;
192: http->result = HT_CREATED;
1.112 frystyk 193: break;
194:
1.127 frystyk 195: case 202: /* Accepted */
1.112 frystyk 196: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_ACCEPTED,
197: me->reason, (int) strlen(me->reason),
198: "HTTPNextState");
1.134 frystyk 199: http->next = HTTP_OK;
200: http->result = HT_ACCEPTED;
1.112 frystyk 201: break;
202:
1.127 frystyk 203: case 203: /* Non-authoritative information */
204: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NON_AUTHORITATIVE,
1.112 frystyk 205: me->reason, (int) strlen(me->reason),
206: "HTTPNextState");
1.134 frystyk 207: http->next = HTTP_OK;
208: http->result = HT_LOADED;
1.71 frystyk 209: break;
1.78 frystyk 210:
211: case 204: /* No Response */
1.112 frystyk 212: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NO_CONTENT,
213: me->reason, (int) strlen(me->reason),
214: "HTTPNextState");
1.134 frystyk 215: http->next = HTTP_OK;
216: http->result = HT_NO_DATA;
217: break;
218:
219: case 205: /* Reset Content */
220: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_RESET,
221: me->reason, (int) strlen(me->reason),
222: "HTTPNextState");
223: http->next = HTTP_OK;
224: http->result = HT_RESET_CONTENT;
225: break;
226:
227: case 206: /* Partial Content */
228: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_PARTIAL,
229: me->reason, (int) strlen(me->reason),
230: "HTTPNextState");
231: http->next = HTTP_OK;
232: http->result = HT_PARTIAL_CONTENT;
233: break;
234:
235: case 300: /* Multiple Choices */
236: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MULTIPLE,
237: me->reason, (int) strlen(me->reason),
238: "HTTPNextState");
239: http->next = HTTP_OK;
240: http->result = HT_LOADED;
1.71 frystyk 241: break;
1.78 frystyk 242:
1.71 frystyk 243: case 301: /* Moved */
1.112 frystyk 244: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_MOVED,
245: me->reason, (int) strlen(me->reason),
246: "HTTPNextState");
1.134 frystyk 247: http->next = HTTP_ERROR;
248: http->result = HT_PERM_REDIRECT;
1.112 frystyk 249: break;
250:
1.71 frystyk 251: case 302: /* Found */
1.112 frystyk 252: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_FOUND,
253: me->reason, (int) strlen(me->reason),
254: "HTTPNextState");
1.134 frystyk 255: http->next = HTTP_ERROR;
256: http->result = HT_TEMP_REDIRECT;
1.71 frystyk 257: break;
1.55 frystyk 258:
1.71 frystyk 259: case 303: /* Method */
1.107 frystyk 260: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
261: me->reason, (int) strlen(me->reason),
262: "HTTPNextState");
1.134 frystyk 263: http->next = HTTP_ERROR;
264: http->result = HT_SEE_OTHER;
1.71 frystyk 265: break;
1.91 frystyk 266:
267: case 304: /* Not Modified */
1.131 frystyk 268: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_NOT_MODIFIED,
1.112 frystyk 269: me->reason, (int) strlen(me->reason),
270: "HTTPNextState");
1.135 frystyk 271: http->next = HTTP_OK;
1.134 frystyk 272: http->result = HT_NOT_MODIFIED;
273: break;
274:
275: case 305: /* Use proxy */
276: HTRequest_addError(me->request, ERR_INFO, NO, HTERR_USE_PROXY,
277: me->reason, (int) strlen(me->reason),
278: "HTTPNextState");
279: http->next = HTTP_ERROR;
280: http->result = HT_USE_PROXY;
1.91 frystyk 281: break;
1.55 frystyk 282:
1.78 frystyk 283: case 400: /* Bad Request */
1.104 frystyk 284: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
1.100 frystyk 285: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 286: http->next = HTTP_ERROR;
287: http->result = HT_ERROR;
1.71 frystyk 288: break;
1.70 howcome 289:
1.71 frystyk 290: case 401:
1.104 frystyk 291: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.100 frystyk 292: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 293: http->next = HTTP_ERROR;
294: http->result = HT_NO_ACCESS;
1.71 frystyk 295: break;
296:
297: case 402: /* Payment required */
1.104 frystyk 298: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
1.100 frystyk 299: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 300: http->next = HTTP_ERROR;
301: http->result = HT_ERROR;
1.71 frystyk 302: break;
1.55 frystyk 303:
1.71 frystyk 304: case 403: /* Forbidden */
1.104 frystyk 305: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
1.100 frystyk 306: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 307: http->next = HTTP_ERROR;
308: http->result = HT_FORBIDDEN;
1.71 frystyk 309: break;
1.55 frystyk 310:
1.71 frystyk 311: case 404: /* Not Found */
1.104 frystyk 312: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
1.100 frystyk 313: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 314: http->next = HTTP_ERROR;
315: http->result = HT_ERROR;
1.71 frystyk 316: break;
317:
1.78 frystyk 318: case 405: /* Not Allowed */
1.104 frystyk 319: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
1.100 frystyk 320: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 321: http->next = HTTP_ERROR;
322: http->result = HT_ERROR;
1.78 frystyk 323: break;
324:
325: case 406: /* None Acceptable */
1.104 frystyk 326: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
1.100 frystyk 327: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 328: http->next = HTTP_ERROR;
329: http->result = HT_NOT_ACCEPTABLE;
1.78 frystyk 330: break;
331:
332: case 407: /* Proxy Authentication Required */
1.127 frystyk 333: HTRequest_addError(me->request, ERR_FATAL, NO,HTERR_PROXY_UNAUTHORIZED,
1.100 frystyk 334: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 335: http->next = HTTP_ERROR;
336: http->result = HT_NO_PROXY_ACCESS;
1.78 frystyk 337: break;
338:
339: case 408: /* Request Timeout */
1.104 frystyk 340: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
1.100 frystyk 341: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 342: http->next = HTTP_ERROR;
343: http->result = HT_ERROR;
344: break;
345:
346: case 409: /* Conflict */
347: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_CONFLICT,
348: me->reason, (int) strlen(me->reason), "HTTPNextState");
349: http->next = HTTP_ERROR;
350: http->result = HT_CONFLICT;
351: break;
352:
353: case 410: /* Gone */
354: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GONE,
355: me->reason, (int) strlen(me->reason), "HTTPNextState");
356: http->next = HTTP_ERROR;
357: http->result = HT_ERROR;
358: break;
359:
360: case 411: /* Length Required */
361: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_LENGTH_REQUIRED,
362: me->reason, (int) strlen(me->reason), "HTTPNextState");
363: http->next = HTTP_ERROR;
364: http->result = HT_LENGTH_REQUIRED;
365: break;
366:
367: case 412: /* Precondition failed */
368: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_PRECON_FAILED,
369: me->reason, (int) strlen(me->reason), "HTTPNextState");
370: http->next = HTTP_ERROR;
371: http->result = HT_ERROR;
372: break;
373:
374: case 413: /* Request entity too large */
375: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_TOO_BIG,
376: me->reason, (int) strlen(me->reason), "HTTPNextState");
377: http->next = HTTP_ERROR;
378: http->result = HT_ERROR;
379: break;
380:
381: case 414: /* Request-URI too long */
382: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_URI_TOO_BIG,
383: me->reason, (int) strlen(me->reason), "HTTPNextState");
384: http->next = HTTP_ERROR;
385: http->result = HT_ERROR;
386: break;
387:
388: case 415: /* Unsupported */
389: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_UNSUPPORTED,
390: me->reason, (int) strlen(me->reason), "HTTPNextState");
391: http->next = HTTP_ERROR;
392: http->result = HT_ERROR;
1.78 frystyk 393: break;
394:
1.71 frystyk 395: case 500:
1.104 frystyk 396: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
1.100 frystyk 397: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 398: http->next = HTTP_ERROR;
399: http->result = HT_ERROR;
1.78 frystyk 400: break;
401:
1.71 frystyk 402: case 501:
1.104 frystyk 403: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
1.100 frystyk 404: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 405: http->next = HTTP_ERROR;
406: http->result = HT_ERROR;
1.78 frystyk 407: break;
408:
409: case 502:
1.104 frystyk 410: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
1.100 frystyk 411: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 412: http->next = HTTP_ERROR;
413: http->result = HT_ERROR;
1.78 frystyk 414: break;
415:
416: case 503:
1.104 frystyk 417: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_DOWN,
1.100 frystyk 418: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 419: http->next = HTTP_ERROR;
1.81 frystyk 420:
1.140 frystyk 421: /*
422: ** If Retry-After header is found then return HT_RETRY else HT_ERROR.
423: ** The caller may want to reissue the request at a later point in time.
424: */
425: {
426: HTResponse * response = HTRequest_response(me->request);
427: if (HTResponse_retryTime(response))
428: http->result = HT_RETRY;
429: else
430: http->result = HT_ERROR;
431: }
1.78 frystyk 432: break;
433:
434: case 504:
1.104 frystyk 435: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
1.100 frystyk 436: me->reason, (int) strlen(me->reason), "HTTPNextState");
1.134 frystyk 437: http->next = HTTP_ERROR;
438: http->result = HT_ERROR;
439: break;
440:
441: case 505: /* Unsupported protocol version */
442: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_VERSION,
443: me->reason, (int) strlen(me->reason), "HTTPNextState");
444: http->next = HTTP_ERROR;
445: http->result = HT_BAD_VERSION;
1.71 frystyk 446: break;
1.78 frystyk 447:
1.71 frystyk 448: default: /* bad number */
1.104 frystyk 449: HTRequest_addError(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.100 frystyk 450: (void *) me->buffer, me->buflen, "HTTPNextState");
1.134 frystyk 451: http->next = HTTP_ERROR;
452: http->result = HT_ERROR;
1.71 frystyk 453: break;
1.55 frystyk 454: }
455: }
456:
1.71 frystyk 457: /* ------------------------------------------------------------------------- */
458: /* HTTP Status Line Stream */
459: /* ------------------------------------------------------------------------- */
1.55 frystyk 460:
1.71 frystyk 461: /*
1.140.2.1 eric 462: ** Analyze the stream we have read. If it is a HTTP 1.0 or higher
1.71 frystyk 463: ** then create a MIME-stream, else create a Guess stream to find out
464: ** what the 0.9 server is sending. We need to copy the buffer as we don't
465: ** know if we can modify the contents or not.
1.78 frystyk 466: **
467: ** Stream handling is a function of the status code returned from the
468: ** server:
469: ** 200: Use `output_stream' in HTRequest structure
1.94 frystyk 470: ** else: Use `debug_stream' in HTRequest structure
1.80 frystyk 471: **
472: ** Return: YES if buffer should be written out. NO otherwise
1.56 frystyk 473: */
1.100 frystyk 474: PRIVATE int stream_pipe (HTStream * me)
1.56 frystyk 475: {
1.136 frystyk 476: HTRequest * request = me->request;
477: HTNet * net = HTRequest_net(request);
1.123 frystyk 478: HTHost * host = HTNet_host(net);
1.140.2.1 eric 479:
480: HTHost_setConsumed(net->host, me->buflen);
1.80 frystyk 481: if (me->target) {
482: int status = PUTBLOCK(me->buffer, me->buflen);
483: if (status == HT_OK)
484: me->transparent = YES;
485: return status;
1.136 frystyk 486: } else if (HTRequest_isSource(request)&&!HTRequest_outputStream(request)) {
1.88 frystyk 487: /*
488: ** We need to wait for the destinations to get ready
489: */
490: return HT_WOULD_BLOCK;
1.80 frystyk 491: }
1.88 frystyk 492:
1.132 frystyk 493: /*
494: ** Just check for HTTP and not HTTP/ as NCSA server chokes on 1.1 replies
495: ** Thanks to Markku Savela <msa@msa.tte.vtt.fi>
496: */
497: #if 0
1.81 frystyk 498: if (strncasecomp(me->buffer, "http/", 5)) {
1.132 frystyk 499: #else
500: if (strncasecomp(me->buffer, "http", 4)) {
501: #endif
1.80 frystyk 502: int status;
1.136 frystyk 503: HTRequest_addError(request, ERR_INFO, NO, HTERR_HTTP09,
1.80 frystyk 504: (void *) me->buffer, me->buflen, "HTTPStatusStream");
1.136 frystyk 505: me->target = HTStreamStack(WWW_UNKNOWN,
506: HTRequest_outputFormat(request),
507: HTRequest_outputStream(request),
508: request, NO);
1.134 frystyk 509: me->http->next = HTTP_OK;
1.80 frystyk 510: if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
511: me->transparent = YES;
1.123 frystyk 512: HTHost_setVersion(host, HTTP_09);
1.80 frystyk 513: return status;
514: } else {
1.140 frystyk 515: HTResponse * response = HTRequest_response(request);
1.133 frystyk 516: char *ptr = me->buffer+4; /* Skip the HTTP part */
1.81 frystyk 517: me->version = HTNextField(&ptr);
1.95 frystyk 518:
1.130 frystyk 519: /* Here we want to find out when to use persistent connection */
1.133 frystyk 520: if (!strncasecomp(me->version, "/1.0", 4)) {
1.128 frystyk 521: if (PROT_TRACE)HTTrace("HTTP Status. This is a HTTP/1.0 server\n");
522: HTHost_setVersion(host, HTTP_10);
1.133 frystyk 523: } else if (!strncasecomp(me->version, "/1.", 3)) { /* 1.x family */
1.128 frystyk 524: HTHost_setVersion(host, HTTP_11);
1.133 frystyk 525: HTNet_setPersistent(net, YES, HT_TP_INTERLEAVE); /* By default */
526: } else {
527: if (PROT_TRACE)HTTrace("HTTP Status. No 1.x version number - treat it as a HTTP/1.0 server\n");
528: HTHost_setVersion(host, HTTP_10);
1.128 frystyk 529: }
1.95 frystyk 530:
1.81 frystyk 531: me->status = atoi(HTNextField(&ptr));
1.133 frystyk 532: /* Kludge to fix the NCSA server version bug */
533: if (me->status == 0) me->status = atoi(me->version);
534:
1.81 frystyk 535: me->reason = ptr;
536: if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
537: *ptr = '\0';
538: else if ((ptr = strchr(me->reason, '\n')) != NULL)
539: *ptr = '\0';
540:
1.130 frystyk 541: /*
542: ** If it is a 1xx code then find out what to do and return until we
543: ** get the next code. In the case of Upgrade we may not get back here
544: ** at all. If we are uploading an entity then continue doing that
545: */
546: if (me->status/100 == 1) {
1.136 frystyk 547: if (HTTPInformation(me) == YES) {
548: me->buflen = 0;
549: me->state = EOL_BEGIN;
550: return HTMethod_hasEntity(HTRequest_method(request)) ?
551: HT_CONTINUE : HT_OK;
1.103 frystyk 552: }
1.56 frystyk 553: }
1.133 frystyk 554:
555: /*
556: ** As we are getting fresh metainformation in the HTTP response,
557: ** we clear the old metainfomation in order not to mix it with the new
558: ** one. This is particularly important for the content-length and the
1.139 frystyk 559: ** like. The TRACE and OPTIONS method just adds to the current
560: ** metainformation so in that case we don't clear the anchor.
1.133 frystyk 561: */
1.136 frystyk 562: if (me->status==200 || me->status==203 || me->status==300) {
1.140 frystyk 563: /*
564: ** 200, 203 and 300 are all fully cacheable responses. No byte
565: ** ranges or anything else make life hard in this case.
566: */
567: HTResponse_setCachable(response, YES);
1.136 frystyk 568: me->target = HTStreamStack(WWW_MIME,
569: HTRequest_outputFormat(request),
570: HTRequest_outputStream(request),
571: request, NO);
1.140 frystyk 572: } else if (me->status==206) {
573: /*
574: ** We got a partial response and now we must check whether
575: ** we issued a cache If-Range request or it was a new
576: ** partial response which we don't have in cache. In the latter
577: ** case, we don't cache the object and in the former we append
578: ** the result to the already existing cache entry.
579: */
580: HTReload reload = HTRequest_reloadMode(request);
581: if (reload == HT_CACHE_RANGE_VALIDATE) {
582: HTResponse_setCachable(response, YES);
583: me->target = HTStreamStack(WWW_MIME_PART,
584: HTRequest_outputFormat(request),
585: HTRequest_outputStream(request),
586: request, NO);
587: } else {
588: me->target = HTStreamStack(WWW_MIME,
589: HTRequest_outputFormat(request),
590: HTRequest_outputStream(request),
591: request, NO);
592: }
1.139 frystyk 593: } else if (me->status==204 || me->status==304) {
1.140 frystyk 594: HTResponse_setCachable(response, YES);
1.136 frystyk 595: me->target = HTStreamStack(WWW_MIME_HEAD,
596: HTRequest_debugFormat(request),
597: HTRequest_debugStream(request),
598: request, NO);
599: } else if (HTRequest_debugStream(request)) {
600: me->target = HTStreamStack(WWW_MIME,
601: HTRequest_debugFormat(request),
602: HTRequest_debugStream(request),
603: request, NO);
604: } else {
1.140 frystyk 605: /*
606: ** We still need to parse the MIME part in order to find any
607: ** valuable meta information which is needed from the response.
608: */
1.136 frystyk 609: me->target = HTStreamStack(WWW_MIME,
610: HTRequest_debugFormat(request),
611: HTRequest_debugStream(request),
612: request, NO);
1.133 frystyk 613: }
1.56 frystyk 614: }
1.113 frystyk 615: if (!me->target) me->target = HTErrorStream();
1.81 frystyk 616: HTTPNextState(me); /* Get next state */
1.80 frystyk 617: me->transparent = YES;
618: return HT_OK;
1.71 frystyk 619: }
1.56 frystyk 620:
1.80 frystyk 621: /*
622: ** Searches for HTTP header line until buffer fills up or a CRLF or LF
623: ** is found
624: */
1.119 frystyk 625: PRIVATE int HTTPStatus_put_block (HTStream * me, const char * b, int l)
1.71 frystyk 626: {
1.80 frystyk 627: while (!me->transparent && l-- > 0) {
628: int status;
629: if (me->target) {
630: if ((status = stream_pipe(me)) != HT_OK)
631: return status;
632: } else {
633: *(me->buffer+me->buflen++) = *b;
634: if (me->state == EOL_FCR) {
635: if (*b == LF) { /* Line found */
636: if ((status = stream_pipe(me)) != HT_OK)
637: return status;
638: } else {
639: me->state = EOL_BEGIN;
640: }
641: } else if (*b == CR) {
642: me->state = EOL_FCR;
643: } else if (*b == LF) {
644: if ((status = stream_pipe(me)) != HT_OK)
645: return status;
1.71 frystyk 646: } else {
1.80 frystyk 647: if (me->buflen >= MAX_STATUS_LEN) {
648: if ((status = stream_pipe(me)) != HT_OK)
649: return status;
650: }
1.71 frystyk 651: }
1.80 frystyk 652: b++;
1.71 frystyk 653: }
1.56 frystyk 654: }
1.99 frystyk 655: if (l > 0) return PUTBLOCK(b, l);
656: return HT_OK;
1.56 frystyk 657: }
658:
1.119 frystyk 659: PRIVATE int HTTPStatus_put_string (HTStream * me, const char * s)
1.71 frystyk 660: {
1.80 frystyk 661: return HTTPStatus_put_block(me, s, (int) strlen(s));
1.71 frystyk 662: }
1.56 frystyk 663:
1.100 frystyk 664: PRIVATE int HTTPStatus_put_character (HTStream * me, char c)
1.71 frystyk 665: {
1.80 frystyk 666: return HTTPStatus_put_block(me, &c, 1);
667: }
668:
1.100 frystyk 669: PRIVATE int HTTPStatus_flush (HTStream * me)
1.80 frystyk 670: {
671: return (*me->target->isa->flush)(me->target);
1.71 frystyk 672: }
673:
1.100 frystyk 674: PRIVATE int HTTPStatus_free (HTStream * me)
1.71 frystyk 675: {
1.87 frystyk 676: int status = HT_OK;
677: if (me->target) {
678: if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
679: return HT_WOULD_BLOCK;
680: }
1.115 frystyk 681: HT_FREE(me);
1.100 frystyk 682: return status;
1.71 frystyk 683: }
684:
1.104 frystyk 685: PRIVATE int HTTPStatus_abort (HTStream * me, HTList * e)
1.71 frystyk 686: {
687: if (me->target)
1.74 frystyk 688: ABORT_TARGET;
1.115 frystyk 689: HT_FREE(me);
1.74 frystyk 690: if (PROT_TRACE)
1.116 eric 691: HTTrace("HTTPStatus.. ABORTING...\n");
1.80 frystyk 692: return HT_ERROR;
1.71 frystyk 693: }
694:
695: /* HTTPStatus Stream
696: ** -----------------
697: */
1.119 frystyk 698: PRIVATE const HTStreamClass HTTPStatusClass =
1.71 frystyk 699: {
700: "HTTPStatus",
1.80 frystyk 701: HTTPStatus_flush,
1.71 frystyk 702: HTTPStatus_free,
703: HTTPStatus_abort,
704: HTTPStatus_put_character,
705: HTTPStatus_put_string,
706: HTTPStatus_put_block
707: };
708:
1.113 frystyk 709: PUBLIC HTStream * HTTPStatus_new (HTRequest * request,
710: void * param,
711: HTFormat input_format,
712: HTFormat output_format,
713: HTStream * output_stream)
1.71 frystyk 714: {
1.115 frystyk 715: HTStream * me;
716: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
717: HT_OUTOFMEM("HTTPStatus_new");
1.71 frystyk 718: me->isa = &HTTPStatusClass;
1.113 frystyk 719: if (request) {
1.126 frystyk 720: HTNet * net = HTRequest_net(request);
1.125 frystyk 721: /* Get existing copy */
722: http_info * http = (http_info *) HTNet_context(net);
1.113 frystyk 723: me->request = request;
724: me->http = http;
725: http->next = HTTP_ERROR;
726: me->state = EOL_BEGIN;
727: return me;
728: } else
729: return HTErrorStream();
1.71 frystyk 730: }
731:
732: /* ------------------------------------------------------------------------- */
733:
734: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 735: ** ==============================
736: **
737: ** Given a hypertext address, this routine loads a document.
738: **
739: ** On entry,
740: ** request This is the request structure
1.94 frystyk 741: ** returns HT_ERROR Error has occured in call back
742: ** HT_OK Call back was OK
1.55 frystyk 743: */
1.140.2.1 eric 744: PRIVATE int HTTPEvent (SOCKET soc, void * pVoid, HTEvent_type type);
745:
746: PUBLIC int HTLoadHTTP (SOCKET soc, HTRequest * request)
1.55 frystyk 747: {
748: http_info *http; /* Specific protocol information */
1.112 frystyk 749: HTParentAnchor *anchor = HTRequest_anchor(request);
1.140.2.1 eric 750: HTNet * net = HTRequest_net(request);
1.112 frystyk 751:
1.94 frystyk 752: /*
753: ** Initiate a new http structure and bind to request structure
754: ** This is actually state HTTP_BEGIN, but it can't be in the state
755: ** machine as we need the structure first.
756: */
1.140.2.1 eric 757: if (PROT_TRACE) HTTrace("HTTP........ Looking for `%s\'\n",
758: HTAnchor_physical(anchor));
759: if ((http = (http_info *) HT_CALLOC(1, sizeof(http_info))) == NULL)
760: HT_OUTOFMEM("HTLoadHTTP");
761: http->state = HTTP_BEGIN;
762: http->next = HTTP_OK;
763: http->result = HT_ERROR;
764: http->net = net;
765: HTNet_setContext(net, http);
766: HTNet_setEventCallback(net, HTTPEvent);
767: HTNet_setEventParam(net, http); /* callbacks get http* */
768:
769: return HTTPEvent(soc, http, HTEvent_NONE); /* get it started - ops is ignored */
770: }
771:
772: PRIVATE int HTTPEvent (SOCKET soc, void * pVoid, HTEvent_type type)
773: {
774: http_info * http = (http_info *)pVoid;
775: int status = HT_ERROR;
776: HTNet * net = http->net;
777: HTRequest * request = HTNet_request(net);
778: HTParentAnchor *anchor = HTRequest_anchor(request);
779:
1.71 frystyk 780: /* Now jump into the machine. We know the state from the previous run */
781: while (1) {
782: switch (http->state) {
1.134 frystyk 783: case HTTP_BEGIN:
1.129 frystyk 784: http->state = HTTP_NEED_CONNECTION;
1.71 frystyk 785: break;
786:
1.123 frystyk 787: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
1.140.2.1 eric 788: status = HTHost_connect(net->host, net, HTAnchor_physical(anchor), HTTP_PORT);
1.80 frystyk 789: if (status == HT_OK) {
1.140 frystyk 790: HTHost * host = HTNet_host(net);
791:
1.123 frystyk 792: /*
1.140 frystyk 793: ** Check the protocol class to see if we have connected to a
794: ** the right class of server, in this case HTTP. If we don't
795: ** know the server then assume a HTTP/1.0
1.123 frystyk 796: */
797: {
798: char * s_class = HTHost_class(host);
1.140 frystyk 799: if (!s_class) {
800: if (HTRequest_proxy(request) == NULL)
801: HTRequest_addConnection(request, "Keep-Alive", "");
802: HTHost_setClass(host, "http");
803: } else if (strcasecomp(s_class, "http")) {
1.123 frystyk 804: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
805: NULL, 0, "HTLoadHTTP");
806: http->state = HTTP_ERROR;
807: break;
808: }
1.95 frystyk 809: }
1.138 frystyk 810:
1.123 frystyk 811: /*
812: ** Create the stream pipe FROM the channel to the application.
813: ** The target for the input stream pipe is set up using the
814: ** stream stack.
1.113 frystyk 815: */
1.140.2.2! frystyk 816: {
! 817: HTStream *me=HTStreamStack(WWW_HTTP,
! 818: HTRequest_outputFormat(request),
! 819: HTRequest_outputStream(request),
! 820: request, YES);
! 821: HTNet_setReadStream(net, me);
! 822: HTRequest_setOutputConnected(request, YES);
! 823: }
1.127 frystyk 824:
1.123 frystyk 825: /*
826: ** Create the stream pipe TO the channel from the application
827: ** and hook it up to the request object
828: */
829: {
1.140.2.2! frystyk 830: HTChannel * channel = HTHost_channel(net->host);
! 831: HTOutputStream * output = HTChannel_output(channel);
1.140 frystyk 832: int version = HTHost_version(host);
1.139 frystyk 833: HTStream * app = NULL;
1.140.2.2! frystyk 834:
! 835: /*
! 836: ** Instead of calling this directly we could have a
! 837: ** stream stack builder on the output stream as well
! 838: */
! 839: #ifdef HT_MUX
! 840: output = (HTOutputStream *) HTMuxWriter_new(host, net, output);
! 841: #endif
! 842:
1.139 frystyk 843: #ifdef HTTP_DUMP
844: if (PROT_TRACE) {
1.140 frystyk 845: if ((htfp = fopen(HTTP_OUTPUT, "wb"))) {
846: output = (HTOutputStream *)
847: HTTee((HTStream *) output,
848: HTFWriter_new(request, htfp, YES), NULL);
1.139 frystyk 849: HTTrace("HTTP........ Dumping request to `%s\'\n",
850: HTTP_OUTPUT);
851: }
852: }
853: #endif /* HTTP_DUMP */
854: app = HTMethod_hasEntity(HTRequest_method(request)) ?
855: HTMIMERequest_new(request,
1.140 frystyk 856: HTTPRequest_new(request, (HTStream *) output, NO,
857: version),
858: YES) :
859: HTTPRequest_new(request, (HTStream *) output, YES,
860: version);
1.123 frystyk 861: HTRequest_setInputStream(request, app);
862: }
1.88 frystyk 863:
864: /*
865: ** Set up concurrent read/write if this request isn't the
866: ** source for a PUT or POST. As source we don't start reading
867: ** before all destinations are ready. If destination then
868: ** register the input stream and get ready for read
869: */
1.112 frystyk 870: if (HTRequest_isDestination(request)) {
1.140.2.1 eric 871: HTHost_register(net->host, net, HTEvent_READ);
1.88 frystyk 872: HTRequest_linkDestination(request);
873: }
1.140.2.1 eric 874: http->state = HTTP_CONNECTED;
875: type = HTEvent_WRITE; /* fresh, so try a write */
1.133 frystyk 876: } else if (status == HT_WOULD_BLOCK || status == HT_PENDING)
1.94 frystyk 877: return HT_OK;
1.71 frystyk 878: else
879: http->state = HTTP_ERROR; /* Error or interrupt */
880: break;
881:
1.87 frystyk 882: /* As we can do simultanous read and write this is now one state */
1.140.2.1 eric 883: case HTTP_CONNECTED:
884: if (type == HTEvent_WRITE) {
1.88 frystyk 885: if (HTRequest_isDestination(request)) {
1.126 frystyk 886: HTRequest * source = HTRequest_source(request);
887: HTNet * srcnet = HTRequest_net(source);
1.112 frystyk 888: if (srcnet) {
1.140.2.1 eric 889: HTHost_register(srcnet->host, srcnet, HTEvent_READ);
890: HTHost_unregister(srcnet->host, srcnet, HTEvent_WRITE);
1.112 frystyk 891: }
1.94 frystyk 892: return HT_OK;
1.80 frystyk 893: }
1.126 frystyk 894:
895: /*
896: ** Should we use the input stream directly or call the post
897: ** callback function to send data down to the network?
898: */
899: {
900: HTStream * input = HTRequest_inputStream(request);
901: HTPostCallback * pcbf = HTRequest_postCallback(request);
1.131 frystyk 902: if (pcbf) {
1.139 frystyk 903: if (http->lock)
904: return HT_OK;
905: else {
1.140.2.1 eric 906: status = (*pcbf)(request, input);
1.140 frystyk 907: if (status == HT_PAUSE || status == HT_LOADED) {
1.140.2.1 eric 908: type = HTEvent_READ;
1.139 frystyk 909: http->lock = YES;
1.140 frystyk 910: } else if (status == HT_ERROR) {
1.139 frystyk 911: http->result = HT_INTERRUPTED;
912: http->state = HTTP_ERROR;
913: break;
914: }
915: }
1.131 frystyk 916: } else {
1.140.2.1 eric 917: if (!HTHost_launchPending(net->host))
918: status = (*input->isa->flush)(input);
919: type = HTEvent_READ;
1.131 frystyk 920: }
921: if (status == HT_WOULD_BLOCK) return HT_OK;
1.126 frystyk 922: }
1.140.2.1 eric 923: } else if (type == HTEvent_READ) {
924: status = HTHost_read(net->host);
1.131 frystyk 925: if (status == HT_WOULD_BLOCK)
1.94 frystyk 926: return HT_OK;
1.131 frystyk 927: else if (status == HT_CONTINUE) {
1.130 frystyk 928: if (PROT_TRACE) HTTrace("HTTP........ Continuing\n");
1.139 frystyk 929: http->lock = NO;
1.140.2.1 eric 930: type = HTEvent_WRITE;
1.130 frystyk 931: continue;
1.133 frystyk 932: } else if (status==HT_LOADED)
1.140.2.1 eric 933: http->state = http->next; /* Jump to next state (OK or ERROR) */
1.133 frystyk 934: else if (status==HT_CLOSED) {
935: HTHost * host = HTNet_host(net);
936:
937: /*
938: ** If this is a persistent connection and we get a close
939: ** then it is an error and we should recover from it by
940: ** restarting the pipe line of requests if any
941: */
942: if (HTHost_isPersistent(host)) {
1.135 frystyk 943: http->result = HT_RECOVER_PIPE;
1.133 frystyk 944: http->state = HTTP_ERROR;
945: break;
946: } else
1.134 frystyk 947: http->state = HTTP_OK;
1.133 frystyk 948: } else
1.94 frystyk 949: http->state = HTTP_ERROR;
1.90 frystyk 950: } else {
1.140.2.1 eric 951: http->state = HTTP_ERROR; /* don't know how to handle OOB */
1.90 frystyk 952: }
1.71 frystyk 953: break;
1.80 frystyk 954:
1.134 frystyk 955: case HTTP_OK:
1.88 frystyk 956: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 957: if (HTRequest_isDestination(request)) {
1.126 frystyk 958: HTRequest * source = HTRequest_source(request);
1.91 frystyk 959: HTLink *link =
1.127 frystyk 960: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 961: (HTAnchor *) anchor);
1.109 frystyk 962: HTLink_setResult(link, HT_LINK_OK);
1.91 frystyk 963: }
1.112 frystyk 964: }
1.134 frystyk 965: HTTPCleanup(request, http->result);
1.94 frystyk 966: return HT_OK;
1.71 frystyk 967: break;
1.80 frystyk 968:
1.71 frystyk 969: case HTTP_ERROR:
1.88 frystyk 970: if (HTRequest_isPostWeb(request)) {
1.91 frystyk 971: if (HTRequest_isDestination(request)) {
1.126 frystyk 972: HTRequest * source = HTRequest_source(request);
1.91 frystyk 973: HTLink *link =
1.127 frystyk 974: HTLink_find((HTAnchor *)HTRequest_anchor(source),
1.112 frystyk 975: (HTAnchor *) anchor);
1.109 frystyk 976: HTLink_setResult(link, HT_LINK_ERROR);
1.91 frystyk 977: }
1.112 frystyk 978: HTRequest_killPostWeb(request);
979: }
1.134 frystyk 980: HTTPCleanup(request, http->result);
1.94 frystyk 981: return HT_OK;
1.71 frystyk 982: break;
983: }
984: } /* End of while(1) */
985: }
1.88 frystyk 986:
1.21 luotonen 987:
Webmaster
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to HTTP.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Public] / libwww / Library / src