cups/request.c

   1 /*
   2  * "$Id: request.c 7946 2008-09-16 23:27:54Z mike $"
   3  *
   4  *   IPP utilities for CUPS.
   5  *
   6  *   Copyright 2007-2010 by Apple Inc.
   7  *   Copyright 1997-2007 by Easy Software Products.
   8  *
   9  *   These coded instructions, statements, and computer programs are the
  10  *   property of Apple Inc. and are protected by Federal copyright
  11  *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12  *   which should have been included with this file.  If this file is
  13  *   file is missing or damaged, see the license at "http://www.cups.org/".
  14  *
  15  *   This file is subject to the Apple OS-Developed Software exception.
  16  *
  17  * Contents:
  18  *
  19  *   cupsDoFileRequest()    - Do an IPP request with a file.
  20  *   cupsDoIORequest()      - Do an IPP request with file descriptors.
  21  *   cupsDoRequest()        - Do an IPP request.
  22  *   cupsGetResponse()      - Get a response to an IPP request.
  23  *   cupsLastError()        - Return the last IPP status code.
  24  *   cupsLastErrorString()  - Return the last IPP status-message.
  25  *   cupsReadResponseData() - Read additional data after the IPP response.
  26  *   cupsSendRequest()      - Send an IPP request.
  27  *   cupsWriteRequestData() - Write additional data after an IPP request.
  28  *   _cupsConnect()         - Get the default server connection...
  29  *   _cupsSetError()        - Set the last IPP status code and status-message.
  30  *   _cupsSetHTTPError()    - Set the last error using the HTTP status.
  31  */
  32
  33 /*
  34  * Include necessary headers...
  35  */
  36
  37 #include "cups-private.h"
  38 #include <fcntl.h>
  39 #include <sys/stat.h>
  40 #if defined(WIN32) || defined(__EMX__)
  41 #  include <io.h>
  42 #else
  43 #  include <unistd.h>
  44 #endif /* WIN32 || __EMX__ */
  45 #ifndef O_BINARY
  46 #  define O_BINARY 0
  47 #endif /* O_BINARY */
  48
  49
  50 /*
  51  * 'cupsDoFileRequest()' - Do an IPP request with a file.
  52  *
  53  * This function sends the IPP request to the specified server, retrying
  54  * and authenticating as necessary.  The request is freed with @link ippDelete@
  55  * after receiving a valid IPP response.
  56  */
  57
  58 ipp_t *                                 /* O - Response data */
  59 cupsDoFileRequest(http_t     *http,     /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
  60                   ipp_t      *request,  /* I - IPP request */
  61                   const char *resource, /* I - HTTP resource for POST */
  62                   const char *filename) /* I - File to send or @code NULL@ for none */
  63 {
  64   ipp_t         *response;              /* IPP response data */
  65   int           infile;                 /* Input file */
  66
  67
  68   DEBUG_printf(("cupsDoFileRequest(http=%p, request=%p(%s), resource=\"%s\", "
  69                 "filename=\"%s\")", http, request,
  70                 request ? ippOpString(request->request.op.operation_id) : "?",
  71                 resource, filename));
  72
  73   if (filename)
  74   {
  75     if ((infile = open(filename, O_RDONLY | O_BINARY)) < 0)
  76     {
  77      /*
  78       * Can't get file information!
  79       */
  80
  81       _cupsSetError(errno == ENOENT ? IPP_NOT_FOUND : IPP_NOT_AUTHORIZED,
  82                     NULL, 0);
  83
  84       ippDelete(request);
  85
  86       return (NULL);
  87     }
  88   }
  89   else
  90     infile = -1;
  91
  92   response = cupsDoIORequest(http, request, resource, infile, -1);
  93
  94   if (infile >= 0)
  95     close(infile);
  96
  97   return (response);
  98 }
  99
 100
 101 /*
 102  * 'cupsDoIORequest()' - Do an IPP request with file descriptors.
 103  *
 104  * This function sends the IPP request to the specified server, retrying
 105  * and authenticating as necessary.  The request is freed with ippDelete()
 106  * after receiving a valid IPP response.
 107  *
 108  * If "infile" is a valid file descriptor, cupsDoIORequest() copies
 109  * all of the data from the file after the IPP request message.
 110  *
 111  * If "outfile" is a valid file descriptor, cupsDoIORequest() copies
 112  * all of the data after the IPP response message to the file.
 113  *
 114  * @since CUPS 1.3/Mac OS X 10.5@
 115  */
 116
 117 ipp_t *                                 /* O - Response data */
 118 cupsDoIORequest(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 119                 ipp_t      *request,    /* I - IPP request */
 120                 const char *resource,   /* I - HTTP resource for POST */
 121                 int        infile,      /* I - File to read from or -1 for none */
 122                 int        outfile)     /* I - File to write to or -1 for none */
 123 {
 124   ipp_t         *response = NULL;       /* IPP response data */
 125   size_t        length = 0;             /* Content-Length value */
 126   http_status_t status;                 /* Status of HTTP request */
 127   struct stat   fileinfo;               /* File information */
 128   int           bytes;                  /* Number of bytes read/written */
 129   char          buffer[32768];          /* Output buffer */
 130
 131
 132   DEBUG_printf(("cupsDoIORequest(http=%p, request=%p(%s), resource=\"%s\", "
 133                 "infile=%d, outfile=%d)", http, request,
 134                 request ? ippOpString(request->request.op.operation_id) : "?",
 135                 resource, infile, outfile));
 136
 137  /*
 138   * Range check input...
 139   */
 140
 141   if (!request || !resource)
 142   {
 143     ippDelete(request);
 144
 145     _cupsSetError(IPP_INTERNAL_ERROR, strerror(EINVAL), 0);
 146
 147     return (NULL);
 148   }
 149
 150  /*
 151   * Get the default connection as needed...
 152   */
 153
 154   if (!http)
 155     if ((http = _cupsConnect()) == NULL)
 156       return (NULL);
 157
 158  /*
 159   * See if we have a file to send...
 160   */
 161
 162   if (infile >= 0)
 163   {
 164     if (fstat(infile, &fileinfo))
 165     {
 166      /*
 167       * Can't get file information!
 168       */
 169
 170       _cupsSetError(errno == EBADF ? IPP_NOT_FOUND : IPP_NOT_AUTHORIZED,
 171                     NULL, 0);
 172
 173       ippDelete(request);
 174
 175       return (NULL);
 176     }
 177
 178 #ifdef WIN32
 179     if (fileinfo.st_mode & _S_IFDIR)
 180 #else
 181     if (S_ISDIR(fileinfo.st_mode))
 182 #endif /* WIN32 */
 183     {
 184      /*
 185       * Can't send a directory...
 186       */
 187
 188       ippDelete(request);
 189
 190       _cupsSetError(IPP_NOT_POSSIBLE, strerror(EISDIR), 0);
 191
 192       return (NULL);
 193     }
 194
 195 #ifndef WIN32
 196     if (!S_ISREG(fileinfo.st_mode))
 197       length = 0;                       /* Chunk when piping */
 198     else
 199 #endif /* !WIN32 */
 200     length = ippLength(request) + fileinfo.st_size;
 201   }
 202   else
 203     length = ippLength(request);
 204
 205   DEBUG_printf(("2cupsDoIORequest: Request length=%ld, total length=%ld",
 206                 (long)ippLength(request), (long)length));
 207
 208  /*
 209   * Clear any "Local" authentication data since it is probably stale...
 210   */
 211
 212   if (http->authstring && !strncmp(http->authstring, "Local ", 6))
 213     httpSetAuthString(http, NULL, NULL);
 214
 215  /*
 216   * Loop until we can send the request without authorization problems.
 217   */
 218
 219   while (response == NULL)
 220   {
 221     DEBUG_puts("2cupsDoIORequest: setup...");
 222
 223    /*
 224     * Send the request...
 225     */
 226
 227     status = cupsSendRequest(http, request, resource, length);
 228
 229     DEBUG_printf(("2cupsDoIORequest: status=%d", status));
 230
 231     if (status == HTTP_CONTINUE && request->state == IPP_DATA && infile >= 0)
 232     {
 233       DEBUG_puts("2cupsDoIORequest: file write...");
 234
 235      /*
 236       * Send the file with the request...
 237       */
 238
 239 #ifndef WIN32
 240       if (S_ISREG(fileinfo.st_mode))
 241 #endif /* WIN32 */
 242       lseek(infile, 0, SEEK_SET);
 243
 244       while ((bytes = (int)read(infile, buffer, sizeof(buffer))) > 0)
 245       {
 246         if (httpCheck(http))
 247         {
 248           if ((status = httpUpdate(http)) != HTTP_CONTINUE)
 249             break;
 250         }
 251
 252         if (httpWrite2(http, buffer, bytes) < bytes)
 253           break;
 254       }
 255     }
 256
 257    /*
 258     * Get the server's response...
 259     */
 260
 261     if (status == HTTP_CONTINUE || status == HTTP_OK)
 262     {
 263       response = cupsGetResponse(http, resource);
 264       status   = http->status;
 265     }
 266     else
 267       httpFlush(http);
 268
 269     DEBUG_printf(("2cupsDoIORequest: status=%d", status));
 270
 271     if (status == HTTP_ERROR ||
 272         (status >= HTTP_BAD_REQUEST && status != HTTP_UNAUTHORIZED &&
 273          status != HTTP_UPGRADE_REQUIRED))
 274     {
 275       _cupsSetHTTPError(status);
 276       break;
 277     }
 278
 279     if (response)
 280     {
 281       if (outfile >= 0)
 282       {
 283        /*
 284         * Write trailing data to file...
 285         */
 286
 287         while ((bytes = (int)httpRead2(http, buffer, sizeof(buffer))) > 0)
 288           if (write(outfile, buffer, bytes) < bytes)
 289             break;
 290       }
 291       else
 292       {
 293        /*
 294         * Flush any remaining data...
 295         */
 296
 297         httpFlush(http);
 298       }
 299     }
 300   }
 301
 302  /*
 303   * Delete the original request and return the response...
 304   */
 305
 306   ippDelete(request);
 307
 308   return (response);
 309 }
 310
 311
 312 /*
 313  * 'cupsDoRequest()' - Do an IPP request.
 314  *
 315  * This function sends the IPP request to the specified server, retrying
 316  * and authenticating as necessary.  The request is freed with ippDelete()
 317  * after receiving a valid IPP response.
 318  */
 319
 320 ipp_t *                                 /* O - Response data */
 321 cupsDoRequest(http_t     *http,         /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 322               ipp_t      *request,      /* I - IPP request */
 323               const char *resource)     /* I - HTTP resource for POST */
 324 {
 325   DEBUG_printf(("cupsDoRequest(http=%p, request=%p(%s), resource=\"%s\")",
 326                 http, request,
 327                 request ? ippOpString(request->request.op.operation_id) : "?",
 328                 resource));
 329
 330   return (cupsDoIORequest(http, request, resource, -1, -1));
 331 }
 332
 333
 334 /*
 335  * 'cupsGetResponse()' - Get a response to an IPP request.
 336  *
 337  * Use this function to get the response for an IPP request sent using
 338  * cupsSendDocument() or cupsSendRequest(). For requests that return
 339  * additional data, use httpRead() after getting a successful response.
 340  *
 341  * @since CUPS 1.4/Mac OS X 10.6@
 342  */
 343
 344 ipp_t *                                 /* O - Response or @code NULL@ on HTTP error */
 345 cupsGetResponse(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 346                 const char *resource)   /* I - HTTP resource for POST */
 347 {
 348   http_status_t status;                 /* HTTP status */
 349   ipp_state_t   state;                  /* IPP read state */
 350   ipp_t         *response = NULL;       /* IPP response */
 351
 352
 353   DEBUG_printf(("cupsGetResponse(http=%p, resource=\"%s\")", http, resource));
 354
 355  /*
 356   * Connect to the default server as needed...
 357   */
 358
 359   if (!http)
 360     http = _cupsConnect();
 361
 362   if (!http || (http->state != HTTP_POST_RECV && http->state != HTTP_POST_SEND))
 363     return (NULL);
 364
 365  /*
 366   * Check for an unfinished chunked request...
 367   */
 368
 369   if (http->data_encoding == HTTP_ENCODE_CHUNKED)
 370   {
 371    /*
 372     * Send a 0-length chunk to finish off the request...
 373     */
 374
 375     DEBUG_puts("2cupsGetResponse: Finishing chunked POST...");
 376
 377     if (httpWrite2(http, "", 0) < 0)
 378       return (NULL);
 379   }
 380
 381  /*
 382   * Wait for a response from the server...
 383   */
 384
 385   DEBUG_printf(("2cupsGetResponse: Update loop, http->status=%d...",
 386                 http->status));
 387
 388   status = http->status;
 389   while (status == HTTP_CONTINUE)
 390     status = httpUpdate(http);
 391
 392   DEBUG_printf(("2cupsGetResponse: status=%d", status));
 393
 394   if (status == HTTP_OK)
 395   {
 396    /*
 397     * Get the IPP response...
 398     */
 399
 400     response = ippNew();
 401
 402     while ((state = ippRead(http, response)) != IPP_DATA)
 403       if (state == IPP_ERROR)
 404         break;
 405
 406     if (state == IPP_ERROR)
 407     {
 408      /*
 409       * Delete the response...
 410       */
 411
 412       DEBUG_puts("1cupsGetResponse: IPP read error!");
 413
 414       ippDelete(response);
 415       response = NULL;
 416
 417       _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 418     }
 419   }
 420   else if (status != HTTP_ERROR)
 421   {
 422    /*
 423     * Flush any error message...
 424     */
 425
 426     httpFlush(http);
 427
 428    /*
 429     * Then handle encryption and authentication...
 430     */
 431
 432     if (status == HTTP_UNAUTHORIZED)
 433     {
 434      /*
 435       * See if we can do authentication...
 436       */
 437
 438       DEBUG_puts("2cupsGetResponse: Need authorization...");
 439
 440       if (!cupsDoAuthentication(http, "POST", resource))
 441         httpReconnect(http);
 442       else
 443         status = HTTP_AUTHORIZATION_CANCELED;
 444     }
 445
 446 #ifdef HAVE_SSL
 447     else if (status == HTTP_UPGRADE_REQUIRED)
 448     {
 449      /*
 450       * Force a reconnect with encryption...
 451       */
 452
 453       DEBUG_puts("2cupsGetResponse: Need encryption...");
 454
 455       if (!httpReconnect(http))
 456         httpEncryption(http, HTTP_ENCRYPT_REQUIRED);
 457     }
 458 #endif /* HAVE_SSL */
 459   }
 460
 461   if (response)
 462   {
 463     ipp_attribute_t     *attr;          /* status-message attribute */
 464
 465
 466     attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
 467
 468     DEBUG_printf(("1cupsGetResponse: status-code=%s, status-message=\"%s\"",
 469                   ippErrorString(response->request.status.status_code),
 470                   attr ? attr->values[0].string.text : ""));
 471
 472     _cupsSetError(response->request.status.status_code,
 473                   attr ? attr->values[0].string.text :
 474                       ippErrorString(response->request.status.status_code), 0);
 475   }
 476   else if (status != HTTP_OK)
 477     _cupsSetHTTPError(status);
 478
 479   return (response);
 480 }
 481
 482
 483 /*
 484  * 'cupsLastError()' - Return the last IPP status code.
 485  */
 486
 487 ipp_status_t                            /* O - IPP status code from last request */
 488 cupsLastError(void)
 489 {
 490   return (_cupsGlobals()->last_error);
 491 }
 492
 493
 494 /*
 495  * 'cupsLastErrorString()' - Return the last IPP status-message.
 496  *
 497  * @since CUPS 1.2/Mac OS X 10.5@
 498  */
 499
 500 const char *                            /* O - status-message text from last request */
 501 cupsLastErrorString(void)
 502 {
 503   return (_cupsGlobals()->last_status_message);
 504 }
 505
 506
 507 /*
 508  * 'cupsReadResponseData()' - Read additional data after the IPP response.
 509  *
 510  * This function is used after cupsGetResponse() to read the PPD or document
 511  * files for CUPS_GET_PPD and CUPS_GET_DOCUMENT requests, respectively.
 512  *
 513  * @since CUPS 1.4/Mac OS X 10.6@
 514  */
 515
 516 ssize_t                                 /* O - Bytes read, 0 on EOF, -1 on error */
 517 cupsReadResponseData(
 518     http_t *http,                       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 519     char   *buffer,                     /* I - Buffer to use */
 520     size_t length)                      /* I - Number of bytes to read */
 521 {
 522  /*
 523   * Get the default connection as needed...
 524   */
 525
 526   DEBUG_printf(("cupsReadResponseData(http=%p, buffer=%p, "
 527                 "length=" CUPS_LLFMT ")", http, buffer, CUPS_LLCAST length));
 528
 529   if (!http)
 530   {
 531     _cups_globals_t *cg = _cupsGlobals();
 532                                         /* Pointer to library globals */
 533
 534     if ((http = cg->http) == NULL)
 535     {
 536       _cupsSetError(IPP_INTERNAL_ERROR, _("No active connection"), 1);
 537       return (-1);
 538     }
 539   }
 540
 541  /*
 542   * Then read from the HTTP connection...
 543   */
 544
 545   return (httpRead2(http, buffer, length));
 546 }
 547
 548
 549 /*
 550  * 'cupsSendRequest()' - Send an IPP request.
 551  *
 552  * Use httpWrite() to write any additional data (document, PPD file, etc.)
 553  * for the request, cupsGetResponse() to get the IPP response, and httpRead()
 554  * to read any additional data following the response. Only one request can be
 555  * sent/queued at a time.
 556  *
 557  * Unlike cupsDoFileRequest(), cupsDoIORequest(), and cupsDoRequest(), the
 558  * request is not freed.
 559  *
 560  * @since CUPS 1.4/Mac OS X 10.6@
 561  */
 562
 563 http_status_t                           /* O - Initial HTTP status */
 564 cupsSendRequest(http_t     *http,       /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 565                 ipp_t      *request,    /* I - IPP request */
 566                 const char *resource,   /* I - Resource path */
 567                 size_t     length)      /* I - Length of data to follow or @code CUPS_LENGTH_VARIABLE@ */
 568 {
 569   http_status_t status;                 /* Status of HTTP request */
 570   int           got_status;             /* Did we get the status? */
 571   ipp_state_t   state;                  /* State of IPP processing */
 572   http_status_t expect;                 /* Expect: header to use */
 573
 574
 575   DEBUG_printf(("cupsSendRequest(http=%p, request=%p(%s), resource=\"%s\", "
 576                 "length=" CUPS_LLFMT ")", http, request,
 577                 request ? ippOpString(request->request.op.operation_id) : "?",
 578                 resource, CUPS_LLCAST length));
 579
 580  /*
 581   * Range check input...
 582   */
 583
 584   if (!request || !resource)
 585   {
 586     _cupsSetError(IPP_INTERNAL_ERROR, strerror(EINVAL), 0);
 587
 588     return (HTTP_ERROR);
 589   }
 590
 591  /*
 592   * Get the default connection as needed...
 593   */
 594
 595   if (!http)
 596     if ((http = _cupsConnect()) == NULL)
 597       return (HTTP_SERVICE_UNAVAILABLE);
 598
 599 #ifdef HAVE_SSL
 600  /*
 601   * See if we have an auth-info attribute and are communicating over
 602   * a non-local link.  If so, encrypt the link so that we can pass
 603   * the authentication information securely...
 604   */
 605
 606   if (ippFindAttribute(request, "auth-info", IPP_TAG_TEXT) &&
 607       !httpAddrLocalhost(http->hostaddr) && !http->tls &&
 608       httpEncryption(http, HTTP_ENCRYPT_REQUIRED))
 609   {
 610     _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 611     return (HTTP_SERVICE_UNAVAILABLE);
 612   }
 613 #endif /* HAVE_SSL */
 614
 615  /*
 616   * Reconnect if the last response had a "Connection: close"...
 617   */
 618
 619   if (!strcasecmp(http->fields[HTTP_FIELD_CONNECTION], "close"))
 620     if (httpReconnect(http))
 621     {
 622       _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 623       return (HTTP_SERVICE_UNAVAILABLE);
 624     }
 625
 626  /*
 627   * Loop until we can send the request without authorization problems.
 628   */
 629
 630   expect = HTTP_CONTINUE;
 631
 632   for (;;)
 633   {
 634     DEBUG_puts("2cupsSendRequest: Setup...");
 635
 636    /*
 637     * Setup the HTTP variables needed...
 638     */
 639
 640     httpClearFields(http);
 641     httpSetLength(http, length);
 642     httpSetField(http, HTTP_FIELD_CONTENT_TYPE, "application/ipp");
 643     httpSetField(http, HTTP_FIELD_AUTHORIZATION, http->authstring);
 644     httpSetExpect(http, expect);
 645
 646     DEBUG_printf(("2cupsSendRequest: authstring=\"%s\"", http->authstring));
 647
 648    /*
 649     * Try the request...
 650     */
 651
 652     DEBUG_puts("2cupsSendRequest: Sending HTTP POST...");
 653
 654     if (httpPost(http, resource))
 655     {
 656       if (httpReconnect(http))
 657       {
 658         _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 659         return (HTTP_SERVICE_UNAVAILABLE);
 660       }
 661       else
 662         continue;
 663     }
 664
 665    /*
 666     * Send the IPP data...
 667     */
 668
 669     DEBUG_puts("2cupsSendRequest: Writing IPP request...");
 670
 671     request->state = IPP_IDLE;
 672     status         = HTTP_CONTINUE;
 673     got_status     = 0;
 674
 675     while ((state = ippWrite(http, request)) != IPP_DATA)
 676       if (state == IPP_ERROR)
 677         break;
 678       else if (httpCheck(http))
 679       {
 680         got_status = 1;
 681
 682         if ((status = httpUpdate(http)) != HTTP_CONTINUE)
 683           break;
 684       }
 685
 686    /*
 687     * Wait up to 1 second to get the 100-continue response as needed...
 688     */
 689
 690     if (!got_status && expect == HTTP_CONTINUE)
 691     {
 692       DEBUG_puts("2cupsSendRequest: Waiting for 100-continue...");
 693
 694       if (httpWait(http, 1000))
 695         status = httpUpdate(http);
 696     }
 697     else if (httpCheck(http))
 698       status = httpUpdate(http);
 699
 700     DEBUG_printf(("2cupsSendRequest: status=%d", status));
 701
 702    /*
 703     * Process the current HTTP status...
 704     */
 705
 706     if (status >= HTTP_BAD_REQUEST)
 707       httpFlush(http);
 708
 709     switch (status)
 710     {
 711       case HTTP_ERROR :
 712       case HTTP_CONTINUE :
 713       case HTTP_OK :
 714           return (status);
 715
 716       case HTTP_UNAUTHORIZED :
 717           if (cupsDoAuthentication(http, "POST", resource))
 718             return (HTTP_AUTHORIZATION_CANCELED);
 719
 720           if (httpReconnect(http))
 721           {
 722             _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 723             return (HTTP_SERVICE_UNAVAILABLE);
 724           }
 725           break;
 726
 727 #ifdef HAVE_SSL
 728       case HTTP_UPGRADE_REQUIRED :
 729          /*
 730           * Flush any error message, reconnect, and then upgrade with
 731           * encryption...
 732           */
 733
 734           if (httpReconnect(http))
 735           {
 736             _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 737             return (HTTP_SERVICE_UNAVAILABLE);
 738           }
 739
 740           if (httpEncryption(http, HTTP_ENCRYPT_REQUIRED))
 741           {
 742             _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 743             return (HTTP_SERVICE_UNAVAILABLE);
 744           }
 745           break;
 746 #endif /* HAVE_SSL */
 747
 748       case HTTP_EXPECTATION_FAILED :
 749          /*
 750           * Don't try using the Expect: header the next time around...
 751           */
 752
 753           expect = (http_status_t)0;
 754
 755           if (httpReconnect(http))
 756           {
 757             _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 758             return (HTTP_SERVICE_UNAVAILABLE);
 759           }
 760           break;
 761
 762       default :
 763          /*
 764           * Some other error...
 765           */
 766
 767           return (status);
 768     }
 769   }
 770 }
 771
 772
 773 /*
 774  * 'cupsWriteRequestData()' - Write additional data after an IPP request.
 775  *
 776  * This function is used after @link cupsSendRequest@ to provide a PPD and
 777  * after @link cupsStartDocument@ to provide a document file.
 778  *
 779  * @since CUPS 1.4/Mac OS X 10.6@
 780  */
 781
 782 http_status_t                           /* O - @code HTTP_CONTINUE@ if OK or HTTP status on error */
 783 cupsWriteRequestData(
 784     http_t     *http,                   /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
 785     const char *buffer,                 /* I - Bytes to write */
 786     size_t     length)                  /* I - Number of bytes to write */
 787 {
 788   int   wused;                          /* Previous bytes in buffer */
 789
 790
 791  /*
 792   * Get the default connection as needed...
 793   */
 794
 795   DEBUG_printf(("cupsWriteRequestData(http=%p, buffer=%p, "
 796                 "length=" CUPS_LLFMT ")", http, buffer, CUPS_LLCAST length));
 797
 798   if (!http)
 799   {
 800     _cups_globals_t *cg = _cupsGlobals();
 801                                         /* Pointer to library globals */
 802
 803     if ((http = cg->http) == NULL)
 804     {
 805       _cupsSetError(IPP_INTERNAL_ERROR, _("No active connection"), 1);
 806       DEBUG_puts("1cupsWriteRequestData: Returning HTTP_ERROR.");
 807       return (HTTP_ERROR);
 808     }
 809   }
 810
 811  /*
 812   * Then write to the HTTP connection...
 813   */
 814
 815   wused = http->wused;
 816
 817   if (httpWrite2(http, buffer, length) < 0)
 818   {
 819     DEBUG_puts("1cupsWriteRequestData: Returning HTTP_ERROR.");
 820     _cupsSetError(IPP_INTERNAL_ERROR, strerror(http->error), 0);
 821     return (HTTP_ERROR);
 822   }
 823
 824  /*
 825   * Finally, check if we have any pending data from the server...
 826   */
 827
 828   if (length >= HTTP_MAX_BUFFER ||
 829       http->wused < wused ||
 830       (wused > 0 && http->wused == length))
 831   {
 832    /*
 833     * We've written something to the server, so check for response data...
 834     */
 835
 836     if (_httpWait(http, 0, 1))
 837     {
 838       http_status_t     status;         /* Status from httpUpdate */
 839
 840       if ((status = httpUpdate(http)) >= HTTP_BAD_REQUEST)
 841       {
 842         _cupsSetHTTPError(status);
 843         httpFlush(http);
 844       }
 845
 846       DEBUG_printf(("1cupsWriteRequestData: Returning %d.\n", status));
 847       return (status);
 848     }
 849   }
 850
 851   DEBUG_puts("1cupsWriteRequestData: Returning HTTP_CONTINUE.");
 852   return (HTTP_CONTINUE);
 853 }
 854
 855
 856 /*
 857  * '_cupsConnect()' - Get the default server connection...
 858  */
 859
 860 http_t *                                /* O - HTTP connection */
 861 _cupsConnect(void)
 862 {
 863   _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
 864
 865
 866  /*
 867   * See if we are connected to the same server...
 868   */
 869
 870   if (cg->http)
 871   {
 872    /*
 873     * Compare the connection hostname, port, and encryption settings to
 874     * the cached defaults; these were initialized the first time we
 875     * connected...
 876     */
 877
 878     if (strcmp(cg->http->hostname, cg->server) ||
 879         cg->ipp_port != _httpAddrPort(cg->http->hostaddr) ||
 880         (cg->http->encryption != cg->encryption &&
 881          cg->http->encryption == HTTP_ENCRYPT_NEVER))
 882     {
 883      /*
 884       * Need to close the current connection because something has changed...
 885       */
 886
 887       httpClose(cg->http);
 888       cg->http = NULL;
 889     }
 890   }
 891
 892  /*
 893   * (Re)connect as needed...
 894   */
 895
 896   if (!cg->http)
 897   {
 898     if ((cg->http = httpConnectEncrypt(cupsServer(), ippPort(),
 899                                        cupsEncryption())) == NULL)
 900     {
 901       if (errno)
 902         _cupsSetError(IPP_SERVICE_UNAVAILABLE, NULL, 0);
 903       else
 904         _cupsSetError(IPP_SERVICE_UNAVAILABLE,
 905                       _("Unable to connect to host."), 1);
 906     }
 907   }
 908
 909  /*
 910   * Return the cached connection...
 911   */
 912
 913   return (cg->http);
 914 }
 915
 916
 917 /*
 918  * '_cupsSetError()' - Set the last IPP status code and status-message.
 919  */
 920
 921 void
 922 _cupsSetError(ipp_status_t status,      /* I - IPP status code */
 923               const char   *message,    /* I - status-message value */
 924               int          localize)    /* I - Localize the message? */
 925 {
 926   _cups_globals_t       *cg;            /* Global data */
 927
 928
 929   if (!message && errno)
 930   {
 931     message  = strerror(errno);
 932     localize = 0;
 933   }
 934
 935   cg             = _cupsGlobals();
 936   cg->last_error = status;
 937
 938   if (cg->last_status_message)
 939   {
 940     _cupsStrFree(cg->last_status_message);
 941
 942     cg->last_status_message = NULL;
 943   }
 944
 945   if (message)
 946   {
 947     if (localize)
 948     {
 949      /*
 950       * Get the message catalog...
 951       */
 952
 953       if (!cg->lang_default)
 954         cg->lang_default = cupsLangDefault();
 955
 956       cg->last_status_message = _cupsStrAlloc(_cupsLangString(cg->lang_default,
 957                                                               message));
 958     }
 959     else
 960       cg->last_status_message = _cupsStrAlloc(message);
 961   }
 962
 963   DEBUG_printf(("4_cupsSetError: last_error=%s, last_status_message=\"%s\"",
 964                 ippErrorString(cg->last_error), cg->last_status_message));
 965 }
 966
 967
 968 /*
 969  * '_cupsSetHTTPError()' - Set the last error using the HTTP status.
 970  */
 971
 972 void
 973 _cupsSetHTTPError(http_status_t status) /* I - HTTP status code */
 974 {
 975   switch (status)
 976   {
 977     case HTTP_NOT_FOUND :
 978         _cupsSetError(IPP_NOT_FOUND, httpStatus(status), 0);
 979         break;
 980
 981     case HTTP_UNAUTHORIZED :
 982         _cupsSetError(IPP_NOT_AUTHENTICATED, httpStatus(status), 0);
 983         break;
 984
 985     case HTTP_AUTHORIZATION_CANCELED :
 986         _cupsSetError(IPP_AUTHENTICATION_CANCELED, httpStatus(status), 0);
 987         break;
 988
 989     case HTTP_FORBIDDEN :
 990         _cupsSetError(IPP_FORBIDDEN, httpStatus(status), 0);
 991         break;
 992
 993     case HTTP_BAD_REQUEST :
 994         _cupsSetError(IPP_BAD_REQUEST, httpStatus(status), 0);
 995         break;
 996
 997     case HTTP_REQUEST_TOO_LARGE :
 998         _cupsSetError(IPP_REQUEST_VALUE, httpStatus(status), 0);
 999         break;
1000
1001     case HTTP_NOT_IMPLEMENTED :
1002         _cupsSetError(IPP_OPERATION_NOT_SUPPORTED, httpStatus(status), 0);
1003         break;
1004
1005     case HTTP_NOT_SUPPORTED :
1006         _cupsSetError(IPP_VERSION_NOT_SUPPORTED, httpStatus(status), 0);
1007         break;
1008
1009     case HTTP_UPGRADE_REQUIRED :
1010         _cupsSetError(IPP_UPGRADE_REQUIRED, httpStatus(status), 0);
1011         break;
1012
1013     case HTTP_PKI_ERROR :
1014         _cupsSetError(IPP_PKI_ERROR, httpStatus(status), 0);
1015         break;
1016
1017     case HTTP_ERROR :
1018         _cupsSetError(IPP_INTERNAL_ERROR, httpStatus(status), 0);
1019         break;
1020
1021     default :
1022         DEBUG_printf(("4_cupsSetHTTPError: HTTP error %d mapped to "
1023                       "IPP_SERVICE_UNAVAILABLE!", status));
1024         _cupsSetError(IPP_SERVICE_UNAVAILABLE, httpStatus(status), 0);
1025         break;
1026   }
1027 }
1028
1029
1030 /*
1031  * End of "$Id: request.c 7946 2008-09-16 23:27:54Z mike $".
1032  */