Annotation of libwww/Library/src/HTTP.c, revision 1.87
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"
1.2 timbl 26: #include "HTAlert.h"
27: #include "HTMIME.h"
1.21 luotonen 28: #include "HTAccess.h" /* HTRequest */
1.14 luotonen 29: #include "HTAABrow.h" /* Access Authorization */
1.20 timbl 30: #include "HTTee.h" /* Tee off a cache stream */
1.78 frystyk 31: #include "HTFWrite.h" /* Write to cache file */
1.80 frystyk 32: #include "HTWriter.h"
1.54 luotonen 33: #include "HTError.h"
1.55 frystyk 34: #include "HTChunk.h"
1.71 frystyk 35: #include "HTGuess.h"
36: #include "HTThread.h"
1.80 frystyk 37: #include "HTTPReq.h"
1.55 frystyk 38: #include "HTTP.h" /* Implements */
39:
40: /* Macros and other defines */
1.71 frystyk 41: #define PUTC(c) (*me->target->isa->put_character)(me->target, c)
42: #define PUTS(s) (*me->target->isa->put_string)(me->target, s)
43: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
44: #define FREE_TARGET (*me->target->isa->_free)(me->target)
1.74 frystyk 45: #define ABORT_TARGET (*me->target->isa->abort)(me->target, e)
1.2 timbl 46:
1.59 frystyk 47: /* Type definitions and global variables etc. local to this module */
48: /* This is the local definition of HTRequest->net_info */
49: typedef enum _HTTPState {
1.81 frystyk 50: HTTP_RETRY = -4,
1.71 frystyk 51: HTTP_ERROR = -3,
52: HTTP_NO_DATA = -2,
53: HTTP_GOT_DATA = -1,
54: HTTP_BEGIN = 0,
55: HTTP_NEED_CONNECTION,
56: HTTP_NEED_REQUEST,
57: HTTP_REDIRECTION,
58: HTTP_AA
1.59 frystyk 59: } HTTPState;
1.55 frystyk 60:
61: typedef struct _http_info {
1.78 frystyk 62: SOCKFD sockfd; /* Socket descripter */
1.71 frystyk 63: SockA sock_addr; /* SockA is defined in tcp.h */
1.68 frystyk 64: HTInputSocket * isoc; /* Input buffer */
1.80 frystyk 65: SocAction action; /* Result of the select call */
66: HTStream * target; /* Target stream */
1.71 frystyk 67: int addressCount; /* Attempts if multi-homed host */
68: time_t connecttime; /* Used on multihomed hosts */
69: struct _HTRequest * request; /* Link back to request structure */
1.68 frystyk 70:
1.81 frystyk 71: HTTPState state; /* Current State of the connection */
72: HTTPState next; /* Next state */
1.55 frystyk 73: } http_info;
74:
1.80 frystyk 75: #define MAX_STATUS_LEN 75 /* Max nb of chars to check StatusLine */
1.55 frystyk 76:
1.71 frystyk 77: struct _HTStream {
78: CONST HTStreamClass * isa;
79: HTStream * target;
80: HTRequest * request;
81: http_info * http;
82: HTSocketEOL state;
83: BOOL transparent;
1.81 frystyk 84: char * version; /* Should we save this? */
1.71 frystyk 85: int status;
1.81 frystyk 86: char * reason;
1.71 frystyk 87: char buffer[MAX_STATUS_LEN+1];
1.80 frystyk 88: int buflen;
1.71 frystyk 89: };
1.21 luotonen 90:
1.71 frystyk 91: /* ------------------------------------------------------------------------- */
92: /* Help Functions */
93: /* ------------------------------------------------------------------------- */
1.21 luotonen 94:
1.71 frystyk 95: /* HTTPCleanup
1.1 timbl 96: **
1.55 frystyk 97: ** This function closes the connection and frees memory.
1.1 timbl 98: **
1.55 frystyk 99: ** Returns 0 on OK, else -1
1.1 timbl 100: */
1.80 frystyk 101: PRIVATE int HTTPCleanup ARGS2(HTRequest *, req, BOOL, abort)
1.1 timbl 102: {
1.71 frystyk 103: http_info *http;
1.55 frystyk 104: int status = 0;
1.80 frystyk 105: if (!req || !req->net_info) {
1.78 frystyk 106: if (PROT_TRACE) fprintf(TDEST, "HTTPCleanup. Bad argument!\n");
1.55 frystyk 107: status = -1;
108: } else {
1.80 frystyk 109: http = (http_info *) req->net_info;
1.78 frystyk 110: if (http->sockfd != INVSOC) {
1.80 frystyk 111:
112: /* Free stream with data TO network */
1.85 frystyk 113: if (http->target) {
114: if (!req->PostCallBack) {
115: if (abort) {
116: (*req->input_stream->isa->abort)(req->input_stream,
117: NULL);
118: } else {
119: (*req->input_stream->isa->_free)(req->input_stream);
120: }
121: }
122:
123: /* Free stream with data FROM network */
1.80 frystyk 124: if (abort)
1.85 frystyk 125: (*http->target->isa->abort)(http->target, NULL);
1.80 frystyk 126: else
1.85 frystyk 127: (*http->target->isa->_free)(http->target);
1.80 frystyk 128: }
1.78 frystyk 129: if (PROT_TRACE)
130: fprintf(TDEST,"HTTP........ Closing socket %d\n",http->sockfd);
1.59 frystyk 131: if ((status = NETCLOSE(http->sockfd)) < 0)
1.78 frystyk 132: HTErrorSysAdd(http->request, ERR_FATAL, socerrno, NO,
133: "NETCLOSE");
1.71 frystyk 134: HTThreadState(http->sockfd, THD_CLOSE);
1.80 frystyk 135: http->sockfd = INVSOC;
1.71 frystyk 136: HTThread_clear((HTNetInfo *) http);
137: }
138: if (http->isoc)
139: HTInputSocket_free(http->isoc);
1.80 frystyk 140: free(http);
141: req->net_info = NULL;
1.55 frystyk 142: }
143: return status;
144: }
145:
146:
1.71 frystyk 147: PRIVATE BOOL HTTPAuthentication ARGS1(HTRequest *, request)
148: {
149: HTAAScheme scheme;
150: HTList *valid_schemes = HTList_new();
151: HTAssocList **scheme_specifics = NULL;
1.76 frystyk 152: char *tmplate = NULL;
1.71 frystyk 153:
154: if (request->WWWAAScheme) {
155: if ((scheme = HTAAScheme_enum(request->WWWAAScheme)) != HTAA_UNKNOWN) {
156: HTList_addObject(valid_schemes, (void *) scheme);
157: if (!scheme_specifics) {
158: int i;
159: scheme_specifics = (HTAssocList**)
160: malloc(HTAA_MAX_SCHEMES * sizeof(HTAssocList*));
161: if (!scheme_specifics)
162: outofmem(__FILE__, "HTTPAuthentication");
163: for (i=0; i < HTAA_MAX_SCHEMES; i++)
164: scheme_specifics[i] = NULL;
165: }
166: scheme_specifics[scheme] = HTAA_parseArgList(request->WWWAARealm);
167: } else if (PROT_TRACE) {
168: HTErrorAdd(request, ERR_INFO, NO, HTERR_UNKNOWN_AA,
169: (void *) request->WWWAAScheme, 0, "HTTPAuthentication");
170: return NO;
171: }
172: }
173: if (request->WWWprotection) {
174: if (PROT_TRACE)
1.78 frystyk 175: fprintf(TDEST, "Protection template set to `%s'\n",
1.71 frystyk 176: request->WWWprotection);
1.76 frystyk 177: StrAllocCopy(tmplate, request->WWWprotection);
1.71 frystyk 178: }
179: request->valid_schemes = valid_schemes;
180: request->scheme_specifics = scheme_specifics;
1.76 frystyk 181: request->prot_template = tmplate;
1.71 frystyk 182: return YES;
183: }
184:
185:
186: /*
187: ** This is a big switch handling all HTTP return codes. It puts in any
188: ** appropiate error message and decides whether we should expect data
1.78 frystyk 189: ** or not.
1.55 frystyk 190: */
1.81 frystyk 191: PRIVATE void HTTPNextState ARGS1(HTStream *, me)
1.55 frystyk 192: {
1.71 frystyk 193: switch (me->status) {
194:
1.78 frystyk 195: case 0: /* 0.9 response */
196: case 200:
197: case 201:
198: case 202:
199: case 203:
1.81 frystyk 200: me->http->next = HTTP_GOT_DATA;
1.71 frystyk 201: break;
1.78 frystyk 202:
203: case 204: /* No Response */
1.81 frystyk 204: me->http->next = HTTP_NO_DATA;
1.71 frystyk 205: break;
1.78 frystyk 206:
1.71 frystyk 207: case 301: /* Moved */
208: case 302: /* Found */
1.81 frystyk 209: me->http->next = HTTP_REDIRECTION;
1.71 frystyk 210: break;
1.55 frystyk 211:
1.71 frystyk 212: case 303: /* Method */
213: HTAlert("This client doesn't support automatic redirection of type `Method'");
1.81 frystyk 214: me->http->next = HTTP_ERROR;
1.71 frystyk 215: break;
1.55 frystyk 216:
1.78 frystyk 217: case 400: /* Bad Request */
218: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_BAD_REQUEST,
1.81 frystyk 219: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
220: me->http->next = HTTP_ERROR;
1.71 frystyk 221: break;
1.70 howcome 222:
1.71 frystyk 223: case 401:
1.78 frystyk 224: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
1.81 frystyk 225: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
226: me->http->next = HTTP_AA;
1.71 frystyk 227: break;
228:
229: case 402: /* Payment required */
1.78 frystyk 230: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_PAYMENT_REQUIRED,
1.81 frystyk 231: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
232: me->http->next = HTTP_ERROR;
1.71 frystyk 233: break;
1.55 frystyk 234:
1.71 frystyk 235: case 403: /* Forbidden */
1.78 frystyk 236: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_FORBIDDEN,
1.81 frystyk 237: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
238: me->http->next = HTTP_ERROR;
1.71 frystyk 239: break;
1.55 frystyk 240:
1.71 frystyk 241: case 404: /* Not Found */
1.78 frystyk 242: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_NOT_FOUND,
1.81 frystyk 243: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
244: me->http->next = HTTP_ERROR;
1.71 frystyk 245: break;
246:
1.78 frystyk 247: case 405: /* Not Allowed */
248: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
1.81 frystyk 249: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
250: me->http->next = HTTP_ERROR;
1.78 frystyk 251: break;
252:
253: case 406: /* None Acceptable */
254: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_NONE_ACCEPTABLE,
1.81 frystyk 255: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
256: me->http->next = HTTP_ERROR;
1.78 frystyk 257: break;
258:
259: case 407: /* Proxy Authentication Required */
260: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_PROXY,
1.81 frystyk 261: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
262: me->http->next = HTTP_ERROR;
1.78 frystyk 263: break;
264:
265: case 408: /* Request Timeout */
266: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_TIMEOUT,
1.81 frystyk 267: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
268: me->http->next = HTTP_ERROR;
1.78 frystyk 269: break;
270:
1.71 frystyk 271: case 500:
1.78 frystyk 272: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_INTERNAL,
1.81 frystyk 273: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
274: me->http->next = HTTP_ERROR;
1.78 frystyk 275: break;
276:
1.71 frystyk 277: case 501:
1.78 frystyk 278: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_NOT_IMPLEMENTED,
1.81 frystyk 279: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
280: me->http->next = HTTP_ERROR;
1.78 frystyk 281: break;
282:
283: case 502:
284: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_BAD_GATE,
1.81 frystyk 285: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
286: me->http->next = HTTP_ERROR;
1.78 frystyk 287: break;
288:
289: case 503:
290: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_DOWN,
1.81 frystyk 291: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
292:
293: /* If Retry-After header is found then return HT_RETRY else HT_ERROR */
294: if (me->request->retry_after)
295: me->http->next = HTTP_RETRY;
296: else
297: me->http->next = HTTP_ERROR;
1.78 frystyk 298: break;
299:
300: case 504:
301: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_GATE_TIMEOUT,
1.81 frystyk 302: me->reason, (int) strlen(me->reason), "HTLoadHTTP");
303: me->http->next = HTTP_ERROR;
1.71 frystyk 304: break;
1.78 frystyk 305:
1.71 frystyk 306: default: /* bad number */
307: HTErrorAdd(me->request, ERR_FATAL, NO, HTERR_BAD_REPLY,
1.80 frystyk 308: (void *) me->buffer, me->buflen, "HTLoadHTTP");
1.81 frystyk 309: me->http->next = HTTP_ERROR;
1.71 frystyk 310: break;
1.55 frystyk 311: }
312: }
313:
1.71 frystyk 314: /* ------------------------------------------------------------------------- */
315: /* HTTP Status Line Stream */
316: /* ------------------------------------------------------------------------- */
1.55 frystyk 317:
1.71 frystyk 318: /*
1.80 frystyk 319: ** Analyse the stream we have read. If it is a HTTP 1.0 or higher
1.71 frystyk 320: ** then create a MIME-stream, else create a Guess stream to find out
321: ** what the 0.9 server is sending. We need to copy the buffer as we don't
322: ** know if we can modify the contents or not.
1.78 frystyk 323: **
324: ** Stream handling is a function of the status code returned from the
325: ** server:
326: ** 200: Use `output_stream' in HTRequest structure
1.80 frystyk 327: ** else: Use `error_stream' in HTRequest structure
328: **
329: ** Return: YES if buffer should be written out. NO otherwise
1.56 frystyk 330: */
1.80 frystyk 331: PRIVATE int stream_pipe ARGS1(HTStream *, me)
1.56 frystyk 332: {
1.71 frystyk 333: HTRequest *req = me->request;
1.80 frystyk 334: if (me->target) {
335: int status = PUTBLOCK(me->buffer, me->buflen);
336: if (status == HT_OK)
337: me->transparent = YES;
338: return status;
339: }
1.81 frystyk 340: if (strncasecomp(me->buffer, "http/", 5)) {
1.80 frystyk 341: int status;
342: HTErrorAdd(req, ERR_INFO, NO, HTERR_HTTP09,
343: (void *) me->buffer, me->buflen, "HTTPStatusStream");
344: me->target = HTGuess_new(req, NULL, WWW_UNKNOWN,
345: req->output_format, req->output_stream);
346: if ((status = PUTBLOCK(me->buffer, me->buflen)) == HT_OK)
347: me->transparent = YES;
348: return status;
349: } else {
1.81 frystyk 350: char *ptr = me->buffer+5; /* Skip the HTTP part */
351: me->version = HTNextField(&ptr);
352: me->status = atoi(HTNextField(&ptr));
353: me->reason = ptr;
354: if ((ptr = strchr(me->reason, '\r')) != NULL) /* Strip \r and \n */
355: *ptr = '0円';
356: else if ((ptr = strchr(me->reason, '\n')) != NULL)
357: *ptr = '0円';
358:
359: /* Set up the streams */
360: if (me->status==200) {
1.80 frystyk 361: HTStream *s;
1.85 frystyk 362: if (req->output_format == WWW_SOURCE) {
363: me->target = HTMIMEConvert(req, NULL, WWW_MIME,
364: req->output_format,
365: req->output_stream);
366: } else {
367: me->target = HTStreamStack(WWW_MIME, req->output_format,
368: req->output_stream, req, NO);
1.80 frystyk 369:
1.85 frystyk 370: /* howcome: test for return value from HTCacheWriter 12/1/95 */
371: if (req->method==METHOD_GET && HTCache_isEnabled() &&
372: (s = HTCacheWriter(req, NULL, WWW_MIME, req->output_format,
373: req->output_stream))) {
374: me->target = HTTee(me->target, s);
375: }
1.80 frystyk 376: }
1.71 frystyk 377: } else {
1.81 frystyk 378: me->target = HTMIMEConvert(req, NULL, WWW_MIME, req->error_format,
379: req->error_stream);
1.56 frystyk 380: }
1.80 frystyk 381: if (!me->target)
382: me->target = HTBlackHole(); /* What else */
1.56 frystyk 383: }
1.81 frystyk 384: HTTPNextState(me); /* Get next state */
1.80 frystyk 385: me->transparent = YES;
386: return HT_OK;
1.71 frystyk 387: }
1.56 frystyk 388:
1.80 frystyk 389: /*
390: ** Searches for HTTP header line until buffer fills up or a CRLF or LF
391: ** is found
392: */
393: PRIVATE int HTTPStatus_put_block ARGS3(HTStream *, me, CONST char*, b, int, l)
1.71 frystyk 394: {
1.80 frystyk 395: while (!me->transparent && l-- > 0) {
396: int status;
397: if (me->target) {
398: if ((status = stream_pipe(me)) != HT_OK)
399: return status;
400: } else {
401: *(me->buffer+me->buflen++) = *b;
402: if (me->state == EOL_FCR) {
403: if (*b == LF) { /* Line found */
404: if ((status = stream_pipe(me)) != HT_OK)
405: return status;
406: } else {
407: me->state = EOL_BEGIN;
408: }
409: } else if (*b == CR) {
410: me->state = EOL_FCR;
411: } else if (*b == LF) {
412: if ((status = stream_pipe(me)) != HT_OK)
413: return status;
1.71 frystyk 414: } else {
1.80 frystyk 415: if (me->buflen >= MAX_STATUS_LEN) {
416: if ((status = stream_pipe(me)) != HT_OK)
417: return status;
418: }
1.71 frystyk 419: }
1.80 frystyk 420: b++;
1.71 frystyk 421: }
1.56 frystyk 422: }
1.80 frystyk 423: if (l > 0)
424: return PUTBLOCK(b, l);
425: return HT_OK;
1.56 frystyk 426: }
427:
1.80 frystyk 428: PRIVATE int HTTPStatus_put_string ARGS2(HTStream *, me, CONST char*, s)
1.71 frystyk 429: {
1.80 frystyk 430: return HTTPStatus_put_block(me, s, (int) strlen(s));
1.71 frystyk 431: }
1.56 frystyk 432:
1.80 frystyk 433: PRIVATE int HTTPStatus_put_character ARGS2(HTStream *, me, char, c)
1.71 frystyk 434: {
1.80 frystyk 435: return HTTPStatus_put_block(me, &c, 1);
436: }
437:
438: PRIVATE int HTTPStatus_flush ARGS1(HTStream *, me)
439: {
440: return (*me->target->isa->flush)(me->target);
1.71 frystyk 441: }
442:
443: PRIVATE int HTTPStatus_free ARGS1(HTStream *, me)
444: {
1.87 ! frystyk 445: int status = HT_OK;
! 446: if (me->target) {
! 447: if ((status = (*me->target->isa->_free)(me->target))==HT_WOULD_BLOCK)
! 448: return HT_WOULD_BLOCK;
! 449: }
1.71 frystyk 450: free(me);
1.80 frystyk 451: return HT_OK;
1.71 frystyk 452: }
453:
454: PRIVATE int HTTPStatus_abort ARGS2(HTStream *, me, HTError, e)
455: {
456: if (me->target)
1.74 frystyk 457: ABORT_TARGET;
1.71 frystyk 458: free(me);
1.74 frystyk 459: if (PROT_TRACE)
1.80 frystyk 460: fprintf(TDEST, "HTTPStatus.. ABORTING...\n");
461: return HT_ERROR;
1.71 frystyk 462: }
463:
464: /* HTTPStatus Stream
465: ** -----------------
466: */
467: PRIVATE CONST HTStreamClass HTTPStatusClass =
468: {
469: "HTTPStatus",
1.80 frystyk 470: HTTPStatus_flush,
1.71 frystyk 471: HTTPStatus_free,
472: HTTPStatus_abort,
473: HTTPStatus_put_character,
474: HTTPStatus_put_string,
475: HTTPStatus_put_block
476: };
477:
478: PUBLIC HTStream * HTTPStatus_new ARGS2(HTRequest *, request,
479: http_info *, http)
480: {
481: HTStream * me = (HTStream *) calloc(1, sizeof(HTStream));
482: if (!me) outofmem(__FILE__, "HTTPStatus_new");
483: me->isa = &HTTPStatusClass;
484: me->request = request;
485: me->http = http;
486: me->state = EOL_BEGIN;
487: return me;
488: }
489:
490: /* ------------------------------------------------------------------------- */
491:
492: /* Load Document from HTTP Server HTLoadHTTP
1.55 frystyk 493: ** ==============================
494: **
495: ** Given a hypertext address, this routine loads a document.
496: **
497: ** On entry,
498: ** request This is the request structure
499: ** On exit,
1.80 frystyk 500: ** returns HT_ERROR Error has occured or interrupted
1.71 frystyk 501: ** HT_WOULD_BLOCK if operation would have blocked
1.58 frystyk 502: ** HT_LOADED if return status 200 OK
503: ** HT_NO_DATA if return status 204 No Response
1.81 frystyk 504: ** HT_RETRY if return status 503 Service Unavail.
1.55 frystyk 505: */
506: PUBLIC int HTLoadHTTP ARGS1 (HTRequest *, request)
507: {
1.71 frystyk 508: int status = HT_ERROR;
509: char *url; /* Gets initialized on every entry */
1.55 frystyk 510: http_info *http; /* Specific protocol information */
511:
512: if (!request || !request->anchor) {
1.78 frystyk 513: if (PROT_TRACE) fprintf(TDEST, "HTLoadHTTP.. Bad argument\n");
1.71 frystyk 514: return HT_ERROR;
1.55 frystyk 515: }
516: url = HTAnchor_physical(request->anchor);
1.17 timbl 517:
1.71 frystyk 518: /* Only do the setup first time through. This is actually state HTTP_BEGIN
519: but it can't be in the state machine as we need the structure first */
520: if (!request->net_info) {
1.22 luotonen 521: /*
1.71 frystyk 522: ** Initiate a new http structure and bind to request structure
523: ** This is actually state HTTP_BEGIN, but it can't be in the state
524: ** machine as we need the structure first.
1.22 luotonen 525: */
1.80 frystyk 526: if (PROT_TRACE) fprintf(TDEST, "HTTP........ Looking for `%s\'\n",url);
1.71 frystyk 527: if ((http = (http_info *) calloc(1, sizeof(http_info))) == NULL)
528: outofmem(__FILE__, "HTLoadHTTP");
1.78 frystyk 529: http->sockfd = INVSOC; /* Invalid socket number */
1.71 frystyk 530: http->request = request;
531: http->state = HTTP_BEGIN;
1.85 frystyk 532: http->next = HTTP_ERROR;
1.71 frystyk 533: request->net_info = (HTNetInfo *) http;
534: HTThread_new((HTNetInfo *) http);
1.80 frystyk 535: request->input_stream = HTTPRequest_new(request,request->input_stream);
1.85 frystyk 536: } else {
1.71 frystyk 537: http = (http_info *) request->net_info; /* Get existing copy */
1.85 frystyk 538: if (http->sockfd != INVSOC && HTThreadIntr(http->sockfd))
539: http->state = HTTP_ERROR;
540: }
1.71 frystyk 541:
542: /* Now jump into the machine. We know the state from the previous run */
543: while (1) {
544: switch (http->state) {
545: case HTTP_BEGIN:
546: /*
547: ** Compose authorization information (this was moved here
548: ** from after the making of the connection so that the connection
549: ** wouldn't have to wait while prompting username and password
550: ** from the user). -- AL 13.10.93
551: */
552: HTAA_composeAuth(request);
553: if (PROT_TRACE) {
554: if (request->authorization)
1.78 frystyk 555: fprintf(TDEST, "HTTP........ Sending Authorization: %s\n",
1.71 frystyk 556: request->authorization);
557: else
1.78 frystyk 558: fprintf(TDEST,
1.71 frystyk 559: "HTTP........ Not sending authorization (yet)\n");
560: }
561: http->state = HTTP_NEED_CONNECTION;
562: break;
563:
564: case HTTP_NEED_CONNECTION: /* Now let's set up a connection */
565: status = HTDoConnect((HTNetInfo *) http, url, TCP_PORT,
566: NULL, NO);
1.80 frystyk 567: if (status == HT_OK) {
1.71 frystyk 568: if (PROT_TRACE)
1.78 frystyk 569: fprintf(TDEST, "HTTP........ Connected, socket %d\n",
1.71 frystyk 570: http->sockfd);
1.80 frystyk 571:
572: /* Set up read buffer, streams and concurrent read/write */
1.71 frystyk 573: http->isoc = HTInputSocket_new(http->sockfd);
1.80 frystyk 574: request->input_stream->target=HTWriter_new(http->sockfd, YES);
575: http->target = HTImProxy ?
576: request->output_stream : HTTPStatus_new(request, http);
1.85 frystyk 577: HTThreadState(http->sockfd, THD_SET_READ);
1.71 frystyk 578: http->state = HTTP_NEED_REQUEST;
579: } else if (status == HT_WOULD_BLOCK)
580: return status;
581: else
582: http->state = HTTP_ERROR; /* Error or interrupt */
583: break;
584:
1.87 ! frystyk 585: /* As we can do simultanous read and write this is now one state */
1.80 frystyk 586: case HTTP_NEED_REQUEST:
587: if (http->action == SOC_WRITE) {
588:
589: /* Find the right way to call back */
590: if (request->CopyRequest) {
591: if (!HTAnchor_headerParsed(request->CopyRequest->anchor))
592: return HT_WOULD_BLOCK;
593: status = request->PostCallBack(request->CopyRequest,
594: request->input_stream);
595: } else if (request->PostCallBack) {
596: status = request->PostCallBack(request,
597: request->input_stream);
598: } else {
599: status = (*request->input_stream->isa->flush)
600: (request->input_stream);
601: }
1.71 frystyk 602: if (status == HT_WOULD_BLOCK)
1.80 frystyk 603: return HT_WOULD_BLOCK;
604: else if (status == HT_INTERRUPTED)
605: http->state = HTTP_ERROR;
1.71 frystyk 606: else
1.80 frystyk 607: http->action = SOC_READ;
608: } else if (http->action == SOC_READ) {
609: status = HTSocketRead(request, http->target);
610: if (status == HT_WOULD_BLOCK)
611: return HT_WOULD_BLOCK;
612: else if (status == HT_INTERRUPTED)
1.71 frystyk 613: http->state = HTTP_ERROR;
1.85 frystyk 614: #if 0
1.80 frystyk 615: else if (status == HT_LOADED) {
1.81 frystyk 616: http->state = http->next; /* Jump to next state */
1.80 frystyk 617: } else
618: http->state = HTTP_ERROR;
1.85 frystyk 619: #else
620: else {
621: if (PROT_TRACE)
1.87 ! frystyk 622: fprintf(TDEST, "TESTTESTTEST Jumping to next state\n");
1.85 frystyk 623: http->state = http->next; /* Jump to next state */
624: }
625: #endif
1.80 frystyk 626: } else
1.78 frystyk 627: http->state = HTTP_ERROR;
1.71 frystyk 628: break;
1.80 frystyk 629:
630: case HTTP_REDIRECTION:
1.71 frystyk 631: if (request->redirect) {
632: if (status == 301) {
633: HTErrorAdd(request, ERR_INFO, NO, HTERR_MOVED,
634: (void *) request->redirect,
635: (int) strlen(request->redirect), "HTLoadHTTP");
636: } else if (status == 302) {
637: HTErrorAdd(request, ERR_INFO, NO, HTERR_FOUND,
638: (void *) request->redirect,
639: (int) strlen(request->redirect), "HTLoadHTTP");
1.55 frystyk 640: }
1.71 frystyk 641: if (++request->redirections < HTMaxRedirections) {
1.87 ! frystyk 642: HTAnchor *anchor = HTAnchor_findAddress(request->redirect);
1.80 frystyk 643: HTTPCleanup(request, NO);
1.87 ! frystyk 644: if (request->CopyRequest) {
! 645: HTThread_kill(request->CopyRequest->net_info);
! 646: request->input_stream = NULL;
! 647: }
! 648:
! 649: /* We have to figure out where we were called from */
! 650: if (request->CopyRequest) {
! 651: char *msg = malloc(strlen(request->redirect)+100);
! 652: if (!msg) outofmem(__FILE__, "HTLoadHTTP");
! 653: sprintf(msg, "Location for destination location has changed to %s, continue operation?", request->redirect);
! 654: if (!HTConfirm(msg)) {
! 655: http->state = HTTP_ERROR;
! 656: free(msg);
! 657: break;
! 658: }
! 659: free(msg);
! 660: return HTCopyAnchor((HTAnchor *)
! 661: request->CopyRequest->anchor,
! 662: (HTParentAnchor *) anchor,
! 663: request);
! 664: } else if (request->PostCallBack) {
! 665: #if 0
! 666: /* Ask if OK */
! 667: return HTUploadAnchor((HTAnchor *) anchor, request);
! 668: #endif
! 669: } else {
! 670: return HTLoadAnchor((HTAnchor *) anchor, request);
! 671: }
1.71 frystyk 672: } else {
673: HTErrorAdd(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
1.58 frystyk 674: NULL, 0, "HTLoadHTTP");
1.71 frystyk 675: http->state = HTTP_ERROR;
1.58 frystyk 676: }
1.71 frystyk 677: } else {
678: HTErrorAdd(request, ERR_FATAL, NO, HTERR_BAD_REPLY,
679: NULL, 0, "HTLoadHTTP");
680: http->state = HTTP_ERROR;
681: }
682: break;
1.80 frystyk 683:
1.71 frystyk 684: case HTTP_AA:
1.80 frystyk 685: HTTPCleanup(request, NO); /* Close connection */
1.85 frystyk 686: /*
1.87 ! frystyk 687: ** We must also kill the source request. If this request has
! 688: ** already got all the date this will result in that we close
! 689: ** the connection but keeps the stream chain and return
! 690: ** HT_WOULD_BLOCK so that we can get the data using the
! 691: ** call back function
1.85 frystyk 692: */
693: if (request->CopyRequest) {
694: HTThread_kill(request->CopyRequest->net_info);
695: request->input_stream = NULL;
696: }
1.71 frystyk 697: if (HTTPAuthentication(request) == YES &&
698: HTAA_retryWithAuth(request) == YES) {
1.85 frystyk 699:
700: /* We have to figure out where we were called from */
701: if (request->CopyRequest) {
702: return HTCopyAnchor((HTAnchor *)
703: request->CopyRequest->anchor,
704: request->anchor,
705: request);
706: } else if (request->PostCallBack) {
707: #if 0
708: return HTUploadAnchor((HTAnchor *)request->anchor,request);
709: #endif
710: } else {
711: return HTLoadAnchor((HTAnchor *) request->anchor, request);
712: }
1.71 frystyk 713: } else {
714: char *unescaped = NULL;
715: StrAllocCopy(unescaped, url);
716: HTUnEscape(unescaped);
717: HTErrorAdd(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
718: (void *) unescaped,
719: (int) strlen(unescaped), "HTLoadHTTP");
720: free(unescaped);
1.80 frystyk 721: return HT_ERROR;
1.71 frystyk 722: }
723: break;
1.80 frystyk 724:
1.71 frystyk 725: case HTTP_GOT_DATA:
1.80 frystyk 726: HTTPCleanup(request, NO);
1.87 ! frystyk 727:
! 728: /* HT_OK means evreything is OK, but not finished! */
! 729: return request->Source ? HT_OK : HT_LOADED;
1.71 frystyk 730: break;
731:
732: case HTTP_NO_DATA:
1.80 frystyk 733: HTTPCleanup(request, NO);
1.71 frystyk 734: return HT_NO_DATA;
735: break;
1.80 frystyk 736:
1.81 frystyk 737: case HTTP_RETRY:
738: HTTPCleanup(request, YES);
739: return HT_RETRY;
740: break;
741:
1.71 frystyk 742: case HTTP_ERROR:
1.80 frystyk 743: HTTPCleanup(request, YES);
1.71 frystyk 744: return HT_ERROR;
745: break;
746: }
747: } /* End of while(1) */
748: }
749:
750: /* Protocol descriptor */
751:
752: GLOBALDEF PUBLIC HTProtocol HTTP = {
753: "http", SOC_NON_BLOCK, HTLoadHTTP, NULL, NULL
754: };
1.21 luotonen 755:
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