Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: b368604d9b
Fetching contributors…

Cannot retrieve contributors at this time

file 1879 lines (1676 sloc) 47.77 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879
/*
* nanohttp.c: minimalist HTTP GET implementation to fetch external subsets.
* focuses on size, streamability, reentrancy and portability
*
* This is clearly not a general purpose HTTP implementation
* If you look for one, check:
* http://www.w3.org/Library/
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define NEED_SOCKETS
#define IN_LIBXML
#include "libxml.h"

#ifdef LIBXML_HTTP_ENABLED
#include <string.h>

#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_RESOLV_H
#ifdef HAVE_ARPA_NAMESER_H
#include <arpa/nameser.h>
#endif
#include <resolv.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifndef HAVE_POLL_H
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#else
#include <poll.h>
#endif
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif


#ifdef VMS
#include <stropts>
#define XML_SOCKLEN_T unsigned int
#endif

#if defined(__MINGW32__) || defined(_WIN32_WCE)
#ifndef _WINSOCKAPI_
#define _WINSOCKAPI_
#endif
#include <wsockcompat.h>
#include <winsock2.h>
#undef XML_SOCKLEN_T
#define XML_SOCKLEN_T unsigned int
#endif

#include <libxml/globals.h>
#include <libxml/xmlerror.h>
#include <libxml/xmlmemory.h>
#include <libxml/parser.h> /* for xmlStr(n)casecmp() */
#include <libxml/nanohttp.h>
#include <libxml/globals.h>
#include <libxml/uri.h>

/**
* A couple portability macros
*/
#ifndef _WINSOCKAPI_
#if !defined(__BEOS__) || defined(__HAIKU__)
#define closesocket(s) close(s)
#endif
#define SOCKET int
#define INVALID_SOCKET (-1)
#endif

#ifdef __BEOS__
#ifndef PF_INET
#define PF_INET AF_INET
#endif
#endif

#ifndef XML_SOCKLEN_T
#define XML_SOCKLEN_T unsigned int
#endif

#ifdef STANDALONE
#define DEBUG_HTTP
#define xmlStrncasecmp(a, b, n) strncasecmp((char *)a, (char *)b, n)
#define xmlStrcasecmpi(a, b) strcasecmp((char *)a, (char *)b)
#endif

#define XML_NANO_HTTP_MAX_REDIR 10

#define XML_NANO_HTTP_CHUNK 4096

#define XML_NANO_HTTP_CLOSED 0
#define XML_NANO_HTTP_WRITE 1
#define XML_NANO_HTTP_READ 2
#define XML_NANO_HTTP_NONE 4

typedef struct xmlNanoHTTPCtxt {
    char *protocol; /* the protocol name */
    char *hostname; /* the host name */
    int port; /* the port */
    char *path; /* the path within the URL */
    char *query; /* the query string */
    SOCKET fd; /* the file descriptor for the socket */
    int state; /* WRITE / READ / CLOSED */
    char *out; /* buffer sent (zero terminated) */
    char *outptr; /* index within the buffer sent */
    char *in; /* the receiving buffer */
    char *content; /* the start of the content */
    char *inptr; /* the next byte to read from network */
    char *inrptr; /* the next byte to give back to the client */
    int inlen; /* len of the input buffer */
    int last; /* return code for last operation */
    int returnValue; /* the protocol return value */
    int version; /* the protocol version */
    int ContentLength; /* specified content length from HTTP header */
    char *contentType; /* the MIME type for the input */
    char *location; /* the new URL in case of redirect */
    char *authHeader; /* contents of {WWW,Proxy}-Authenticate header */
    char *encoding; /* encoding extracted from the contentType */
    char *mimeType; /* Mime-Type extracted from the contentType */
#ifdef HAVE_ZLIB_H
    z_stream *strm; /* Zlib stream object */
    int usesGzip; /* "Content-Encoding: gzip" was detected */
#endif
} xmlNanoHTTPCtxt, *xmlNanoHTTPCtxtPtr;

static int initialized = 0;
static char *proxy = NULL; /* the proxy name if any */
static int proxyPort; /* the proxy port if any */
static unsigned int timeout = 60;/* the select() timeout in seconds */

static int xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len );

/**
* xmlHTTPErrMemory:
* @extra: extra informations
*
* Handle an out of memory condition
*/
static void
xmlHTTPErrMemory(const char *extra)
{
    __xmlSimpleError(XML_FROM_HTTP, XML_ERR_NO_MEMORY, NULL, NULL, extra);
}

/**
* A portability function
*/
static int socket_errno(void) {
#ifdef _WINSOCKAPI_
    return(WSAGetLastError());
#else
    return(errno);
#endif
}

#ifdef SUPPORT_IP6
static
int have_ipv6(void) {
    SOCKET s;

    s = socket (AF_INET6, SOCK_STREAM, 0);
    if (s != INVALID_SOCKET) {
close (s);
return (1);
    }
    return (0);
}
#endif

/**
* xmlNanoHTTPInit:
*
* Initialize the HTTP protocol layer.
* Currently it just checks for proxy informations
*/

void
xmlNanoHTTPInit(void) {
    const char *env;
#ifdef _WINSOCKAPI_
    WSADATA wsaData;
#endif

    if (initialized)
return;

#ifdef _WINSOCKAPI_
    if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)
return;
#endif

    if (proxy == NULL) {
proxyPort = 80;
env = getenv("no_proxy");
if (env && ((env[0] == '*') && (env[1] == 0)))
goto done;
env = getenv("http_proxy");
if (env != NULL) {
xmlNanoHTTPScanProxy(env);
goto done;
}
env = getenv("HTTP_PROXY");
if (env != NULL) {
xmlNanoHTTPScanProxy(env);
goto done;
}
    }
done:
    initialized = 1;
}

/**
* xmlNanoHTTPCleanup:
*
* Cleanup the HTTP protocol layer.
*/

void
xmlNanoHTTPCleanup(void) {
    if (proxy != NULL) {
xmlFree(proxy);
proxy = NULL;
    }
#ifdef _WINSOCKAPI_
    if (initialized)
WSACleanup();
#endif
    initialized = 0;
    return;
}

/**
* xmlNanoHTTPScanURL:
* @ctxt: an HTTP context
* @URL: The URL used to initialize the context
*
* (Re)Initialize an HTTP context by parsing the URL and finding
* the protocol host port and path it indicates.
*/

static void
xmlNanoHTTPScanURL(xmlNanoHTTPCtxtPtr ctxt, const char *URL) {
    xmlURIPtr uri;
    /*
* Clear any existing data from the context
*/
    if (ctxt->protocol != NULL) {
        xmlFree(ctxt->protocol);
ctxt->protocol = NULL;
    }
    if (ctxt->hostname != NULL) {
        xmlFree(ctxt->hostname);
ctxt->hostname = NULL;
    }
    if (ctxt->path != NULL) {
        xmlFree(ctxt->path);
ctxt->path = NULL;
    }
    if (ctxt->query != NULL) {
        xmlFree(ctxt->query);
ctxt->query = NULL;
    }
    if (URL == NULL) return;

    uri = xmlParseURIRaw(URL, 1);
    if (uri == NULL)
return;

    if ((uri->scheme == NULL) || (uri->server == NULL)) {
xmlFreeURI(uri);
return;
    }
    
    ctxt->protocol = xmlMemStrdup(uri->scheme);
    ctxt->hostname = xmlMemStrdup(uri->server);
    if (uri->path != NULL)
ctxt->path = xmlMemStrdup(uri->path);
    else
ctxt->path = xmlMemStrdup("/");
    if (uri->query != NULL)
ctxt->query = xmlMemStrdup(uri->query);
    if (uri->port != 0)
ctxt->port = uri->port;

    xmlFreeURI(uri);
}

/**
* xmlNanoHTTPScanProxy:
* @URL: The proxy URL used to initialize the proxy context
*
* (Re)Initialize the HTTP Proxy context by parsing the URL and finding
* the protocol host port it indicates.
* Should be like http://myproxy/ or http://myproxy:3128/
* A NULL URL cleans up proxy informations.
*/

void
xmlNanoHTTPScanProxy(const char *URL) {
    xmlURIPtr uri;

    if (proxy != NULL) {
        xmlFree(proxy);
proxy = NULL;
    }
    proxyPort = 0;

#ifdef DEBUG_HTTP
    if (URL == NULL)
xmlGenericError(xmlGenericErrorContext,
"Removing HTTP proxy info\n");
    else
xmlGenericError(xmlGenericErrorContext,
"Using HTTP proxy %s\n", URL);
#endif
    if (URL == NULL) return;

    uri = xmlParseURIRaw(URL, 1);
    if ((uri == NULL) || (uri->scheme == NULL) ||
(strcmp(uri->scheme, "http")) || (uri->server == NULL)) {
__xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Syntax Error\n");
if (uri != NULL)
xmlFreeURI(uri);
return;
    }
    
    proxy = xmlMemStrdup(uri->server);
    if (uri->port != 0)
proxyPort = uri->port;

    xmlFreeURI(uri);
}

/**
* xmlNanoHTTPNewCtxt:
* @URL: The URL used to initialize the context
*
* Allocate and initialize a new HTTP context.
*
* Returns an HTTP context or NULL in case of error.
*/

static xmlNanoHTTPCtxtPtr
xmlNanoHTTPNewCtxt(const char *URL) {
    xmlNanoHTTPCtxtPtr ret;

    ret = (xmlNanoHTTPCtxtPtr) xmlMalloc(sizeof(xmlNanoHTTPCtxt));
    if (ret == NULL) {
        xmlHTTPErrMemory("allocating context");
        return(NULL);
    }

    memset(ret, 0, sizeof(xmlNanoHTTPCtxt));
    ret->port = 80;
    ret->returnValue = 0;
    ret->fd = INVALID_SOCKET;
    ret->ContentLength = -1;

    xmlNanoHTTPScanURL(ret, URL);

    return(ret);
}

/**
* xmlNanoHTTPFreeCtxt:
* @ctxt: an HTTP context
*
* Frees the context after closing the connection.
*/

static void
xmlNanoHTTPFreeCtxt(xmlNanoHTTPCtxtPtr ctxt) {
    if (ctxt == NULL) return;
    if (ctxt->hostname != NULL) xmlFree(ctxt->hostname);
    if (ctxt->protocol != NULL) xmlFree(ctxt->protocol);
    if (ctxt->path != NULL) xmlFree(ctxt->path);
    if (ctxt->query != NULL) xmlFree(ctxt->query);
    if (ctxt->out != NULL) xmlFree(ctxt->out);
    if (ctxt->in != NULL) xmlFree(ctxt->in);
    if (ctxt->contentType != NULL) xmlFree(ctxt->contentType);
    if (ctxt->encoding != NULL) xmlFree(ctxt->encoding);
    if (ctxt->mimeType != NULL) xmlFree(ctxt->mimeType);
    if (ctxt->location != NULL) xmlFree(ctxt->location);
    if (ctxt->authHeader != NULL) xmlFree(ctxt->authHeader);
#ifdef HAVE_ZLIB_H
    if (ctxt->strm != NULL) {
inflateEnd(ctxt->strm);
xmlFree(ctxt->strm);
    }
#endif

    ctxt->state = XML_NANO_HTTP_NONE;
    if (ctxt->fd != INVALID_SOCKET) closesocket(ctxt->fd);
    ctxt->fd = INVALID_SOCKET;
    xmlFree(ctxt);
}

/**
* xmlNanoHTTPSend:
* @ctxt: an HTTP context
*
* Send the input needed to initiate the processing on the server side
* Returns number of bytes sent or -1 on error.
*/

static int
xmlNanoHTTPSend(xmlNanoHTTPCtxtPtr ctxt, const char *xmt_ptr, int outlen)
{
    int total_sent = 0;
#ifdef HAVE_POLL_H
    struct pollfd p;
#else
    struct timeval tv;
    fd_set wfd;
#endif

    if ((ctxt->state & XML_NANO_HTTP_WRITE) && (xmt_ptr != NULL)) {
        while (total_sent < outlen) {
            int nsent = send(ctxt->fd, xmt_ptr + total_sent,
                             outlen - total_sent, 0);

            if (nsent > 0)
                total_sent += nsent;
            else if ((nsent == -1) &&
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
                     (socket_errno() != EAGAIN) &&
#endif
                     (socket_errno() != EWOULDBLOCK)) {
                __xmlIOErr(XML_FROM_HTTP, 0, "send failed\n");
                if (total_sent == 0)
                    total_sent = -1;
                break;
            } else {
                /*
* No data sent
* Since non-blocking sockets are used, wait for
* socket to be writable or default timeout prior
* to retrying.
*/
#ifndef HAVE_POLL_H
#ifndef _WINSOCKAPI_
                if (ctxt->fd > FD_SETSIZE)
                    return -1;
#endif

                tv.tv_sec = timeout;
                tv.tv_usec = 0;
                FD_ZERO(&wfd);
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4018)
#endif
                FD_SET(ctxt->fd, &wfd);
#ifdef _MSC_VER
#pragma warning(pop)
#endif
                (void) select(ctxt->fd + 1, NULL, &wfd, NULL, &tv);
#else
                p.fd = ctxt->fd;
                p.events = POLLOUT;
                (void) poll(&p, 1, timeout * 1000);
#endif /* !HAVE_POLL_H */
            }
        }
    }

    return total_sent;
}

/**
* xmlNanoHTTPRecv:
* @ctxt: an HTTP context
*
* Read information coming from the HTTP connection.
* This is a blocking call (but it blocks in select(), not read()).
*
* Returns the number of byte read or -1 in case of error.
*/

static int
xmlNanoHTTPRecv(xmlNanoHTTPCtxtPtr ctxt)
{
#ifdef HAVE_POLL_H
    struct pollfd p;
#else
    fd_set rfd;
    struct timeval tv;
#endif


    while (ctxt->state & XML_NANO_HTTP_READ) {
        if (ctxt->in == NULL) {
            ctxt->in = (char *) xmlMallocAtomic(65000 * sizeof(char));
            if (ctxt->in == NULL) {
                xmlHTTPErrMemory("allocating input");
                ctxt->last = -1;
                return (-1);
            }
            ctxt->inlen = 65000;
            ctxt->inptr = ctxt->content = ctxt->inrptr = ctxt->in;
        }
        if (ctxt->inrptr > ctxt->in + XML_NANO_HTTP_CHUNK) {
            int delta = ctxt->inrptr - ctxt->in;
            int len = ctxt->inptr - ctxt->inrptr;

            memmove(ctxt->in, ctxt->inrptr, len);
            ctxt->inrptr -= delta;
            ctxt->content -= delta;
            ctxt->inptr -= delta;
        }
        if ((ctxt->in + ctxt->inlen) < (ctxt->inptr + XML_NANO_HTTP_CHUNK)) {
            int d_inptr = ctxt->inptr - ctxt->in;
            int d_content = ctxt->content - ctxt->in;
            int d_inrptr = ctxt->inrptr - ctxt->in;
            char *tmp_ptr = ctxt->in;

            ctxt->inlen *= 2;
            ctxt->in = (char *) xmlRealloc(tmp_ptr, ctxt->inlen);
            if (ctxt->in == NULL) {
                xmlHTTPErrMemory("allocating input buffer");
                xmlFree(tmp_ptr);
                ctxt->last = -1;
                return (-1);
            }
            ctxt->inptr = ctxt->in + d_inptr;
            ctxt->content = ctxt->in + d_content;
            ctxt->inrptr = ctxt->in + d_inrptr;
        }
        ctxt->last = recv(ctxt->fd, ctxt->inptr, XML_NANO_HTTP_CHUNK, 0);
        if (ctxt->last > 0) {
            ctxt->inptr += ctxt->last;
            return (ctxt->last);
        }
        if (ctxt->last == 0) {
            return (0);
        }
        if (ctxt->last == -1) {
            switch (socket_errno()) {
                case EINPROGRESS:
                case EWOULDBLOCK:
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
                case EAGAIN:
#endif
                    break;

                case ECONNRESET:
                case ESHUTDOWN:
                    return (0);

                default:
                    __xmlIOErr(XML_FROM_HTTP, 0, "recv failed\n");
                    return (-1);
            }
        }
#ifdef HAVE_POLL_H
        p.fd = ctxt->fd;
        p.events = POLLIN;
        if ((poll(&p, 1, timeout * 1000) < 1)
#if defined(EINTR)
            && (errno != EINTR)
#endif
            )
            return (0);
#else /* !HAVE_POLL_H */
#ifndef _WINSOCKAPI_
        if (ctxt->fd > FD_SETSIZE)
            return 0;
#endif

        tv.tv_sec = timeout;
        tv.tv_usec = 0;
        FD_ZERO(&rfd);

#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4018)
#endif

        FD_SET(ctxt->fd, &rfd);

#ifdef _MSC_VER
#pragma warning(pop)
#endif

        if ((select(ctxt->fd + 1, &rfd, NULL, NULL, &tv) < 1)
#if defined(EINTR)
            && (errno != EINTR)
#endif
            )
            return (0);
#endif /* !HAVE_POLL_H */
    }
    return (0);
}

/**
* xmlNanoHTTPReadLine:
* @ctxt: an HTTP context
*
* Read one line in the HTTP server output, usually for extracting
* the HTTP protocol informations from the answer header.
*
* Returns a newly allocated string with a copy of the line, or NULL
* which indicate the end of the input.
*/

static char *
xmlNanoHTTPReadLine(xmlNanoHTTPCtxtPtr ctxt) {
    char buf[4096];
    char *bp = buf;
    int rc;
    
    while (bp - buf < 4095) {
if (ctxt->inrptr == ctxt->inptr) {
if ( (rc = xmlNanoHTTPRecv(ctxt)) == 0) {
if (bp == buf)
return(NULL);
else
*bp = 0;
return(xmlMemStrdup(buf));
}
else if ( rc == -1 ) {
return ( NULL );
}
}
*bp = *ctxt->inrptr++;
if (*bp == '\n') {
*bp = 0;
return(xmlMemStrdup(buf));
}
if (*bp != '\r')
bp++;
    }
    buf[4095] = 0;
    return(xmlMemStrdup(buf));
}


/**
* xmlNanoHTTPScanAnswer:
* @ctxt: an HTTP context
* @line: an HTTP header line
*
* Try to extract useful informations from the server answer.
* We currently parse and process:
* - The HTTP revision/ return code
* - The Content-Type, Mime-Type and charset used
* - The Location for redirect processing.
*
* Returns -1 in case of failure, the file descriptor number otherwise
*/

static void
xmlNanoHTTPScanAnswer(xmlNanoHTTPCtxtPtr ctxt, const char *line) {
    const char *cur = line;

    if (line == NULL) return;

    if (!strncmp(line, "HTTP/", 5)) {
        int version = 0;
int ret = 0;

cur += 5;
while ((*cur >= '0') && (*cur <= '9')) {
version *= 10;
version += *cur - '0';
cur++;
}
if (*cur == '.') {
cur++;
if ((*cur >= '0') && (*cur <= '9')) {
version *= 10;
version += *cur - '0';
cur++;
}
while ((*cur >= '0') && (*cur <= '9'))
cur++;
} else
version *= 10;
if ((*cur != ' ') && (*cur != '\t')) return;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if ((*cur < '0') || (*cur > '9')) return;
while ((*cur >= '0') && (*cur <= '9')) {
ret *= 10;
ret += *cur - '0';
cur++;
}
if ((*cur != 0) && (*cur != ' ') && (*cur != '\t')) return;
ctxt->returnValue = ret;
        ctxt->version = version;
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Content-Type:", 13)) {
        const xmlChar *charset, *last, *mime;
        cur += 13;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if (ctxt->contentType != NULL)
xmlFree(ctxt->contentType);
ctxt->contentType = xmlMemStrdup(cur);
mime = (const xmlChar *) cur;
last = mime;
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
(*last != ';') && (*last != ','))
last++;
if (ctxt->mimeType != NULL)
xmlFree(ctxt->mimeType);
ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
if (charset != NULL) {
charset += 8;
last = charset;
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
(*last != ';') && (*last != ','))
last++;
if (ctxt->encoding != NULL)
xmlFree(ctxt->encoding);
ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
}
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"ContentType:", 12)) {
        const xmlChar *charset, *last, *mime;
        cur += 12;
if (ctxt->contentType != NULL) return;
while ((*cur == ' ') || (*cur == '\t')) cur++;
ctxt->contentType = xmlMemStrdup(cur);
mime = (const xmlChar *) cur;
last = mime;
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
(*last != ';') && (*last != ','))
last++;
if (ctxt->mimeType != NULL)
xmlFree(ctxt->mimeType);
ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
if (charset != NULL) {
charset += 8;
last = charset;
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
(*last != ';') && (*last != ','))
last++;
if (ctxt->encoding != NULL)
xmlFree(ctxt->encoding);
ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
}
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Location:", 9)) {
        cur += 9;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if (ctxt->location != NULL)
xmlFree(ctxt->location);
if (*cur == '/') {
xmlChar *tmp_http = xmlStrdup(BAD_CAST "http://");
xmlChar *tmp_loc =
xmlStrcat(tmp_http, (const xmlChar *) ctxt->hostname);
ctxt->location =
(char *) xmlStrcat (tmp_loc, (const xmlChar *) cur);
} else {
ctxt->location = xmlMemStrdup(cur);
}
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"WWW-Authenticate:", 17)) {
        cur += 17;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if (ctxt->authHeader != NULL)
xmlFree(ctxt->authHeader);
ctxt->authHeader = xmlMemStrdup(cur);
    } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Proxy-Authenticate:", 19)) {
        cur += 19;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if (ctxt->authHeader != NULL)
xmlFree(ctxt->authHeader);
ctxt->authHeader = xmlMemStrdup(cur);
#ifdef HAVE_ZLIB_H
    } else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Encoding:", 17) ) {
cur += 17;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if ( !xmlStrncasecmp( BAD_CAST cur, BAD_CAST"gzip", 4) ) {
ctxt->usesGzip = 1;

ctxt->strm = xmlMalloc(sizeof(z_stream));

if (ctxt->strm != NULL) {
ctxt->strm->zalloc = Z_NULL;
ctxt->strm->zfree = Z_NULL;
ctxt->strm->opaque = Z_NULL;
ctxt->strm->avail_in = 0;
ctxt->strm->next_in = Z_NULL;

inflateInit2( ctxt->strm, 31 );
}
}
#endif
    } else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Length:", 15) ) {
cur += 15;
ctxt->ContentLength = strtol( cur, NULL, 10 );
    }
}

/**
* xmlNanoHTTPConnectAttempt:
* @addr: a socket address structure
*
* Attempt a connection to the given IP:port endpoint. It forces
* non-blocking semantic on the socket, and allow 60 seconds for
* the host to answer.
*
* Returns -1 in case of failure, the file descriptor number otherwise
*/

static SOCKET
xmlNanoHTTPConnectAttempt(struct sockaddr *addr)
{
#ifndef HAVE_POLL_H
    fd_set wfd;
#ifdef _WINSOCKAPI_
    fd_set xfd;
#endif
    struct timeval tv;
#else /* !HAVE_POLL_H */
    struct pollfd p;
#endif /* !HAVE_POLL_H */
    int status;

    int addrlen;

    SOCKET s;

#ifdef SUPPORT_IP6
    if (addr->sa_family == AF_INET6) {
        s = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
        addrlen = sizeof(struct sockaddr_in6);
    } else
#endif
    {
        s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
        addrlen = sizeof(struct sockaddr_in);
    }
    if (s == INVALID_SOCKET) {
#ifdef DEBUG_HTTP
        perror("socket");
#endif
        __xmlIOErr(XML_FROM_HTTP, 0, "socket failed\n");
        return INVALID_SOCKET;
    }
#ifdef _WINSOCKAPI_
    {
        u_long one = 1;

        status = ioctlsocket(s, FIONBIO, &one) == SOCKET_ERROR ? -1 : 0;
    }
#else /* _WINSOCKAPI_ */
#if defined(VMS)
    {
        int enable = 1;

        status = ioctl(s, FIONBIO, &enable);
    }
#else /* VMS */
#if defined(__BEOS__) && !defined(__HAIKU__)
    {
        bool noblock = true;

        status =
            setsockopt(s, SOL_SOCKET, SO_NONBLOCK, &noblock,
                       sizeof(noblock));
    }
#else /* __BEOS__ */
    if ((status = fcntl(s, F_GETFL, 0)) != -1) {
#ifdef O_NONBLOCK
        status |= O_NONBLOCK;
#else /* O_NONBLOCK */
#ifdef F_NDELAY
        status |= F_NDELAY;
#endif /* F_NDELAY */
#endif /* !O_NONBLOCK */
        status = fcntl(s, F_SETFL, status);
    }
    if (status < 0) {
#ifdef DEBUG_HTTP
        perror("nonblocking");
#endif
        __xmlIOErr(XML_FROM_HTTP, 0, "error setting non-blocking IO\n");
        closesocket(s);
        return INVALID_SOCKET;
    }
#endif /* !__BEOS__ */
#endif /* !VMS */
#endif /* !_WINSOCKAPI_ */

    if (connect(s, addr, addrlen) == -1) {
        switch (socket_errno()) {
            case EINPROGRESS:
            case EWOULDBLOCK:
                break;
            default:
                __xmlIOErr(XML_FROM_HTTP, 0,
                           "error connecting to HTTP server");
                closesocket(s);
                return INVALID_SOCKET;
        }
    }
#ifndef HAVE_POLL_H
    tv.tv_sec = timeout;
    tv.tv_usec = 0;

#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4018)
#endif
#ifndef _WINSOCKAPI_
    if (s > FD_SETSIZE)
        return INVALID_SOCKET;
#endif
    FD_ZERO(&wfd);
    FD_SET(s, &wfd);

#ifdef _WINSOCKAPI_
    FD_ZERO(&xfd);
    FD_SET(s, &xfd);

    switch (select(s + 1, NULL, &wfd, &xfd, &tv))
#else
    switch (select(s + 1, NULL, &wfd, NULL, &tv))
#endif
#ifdef _MSC_VER
#pragma warning(pop)
#endif

#else /* !HAVE_POLL_H */
    p.fd = s;
    p.events = POLLOUT;
    switch (poll(&p, 1, timeout * 1000))
#endif /* !HAVE_POLL_H */

    {
        case 0:
            /* Time out */
            __xmlIOErr(XML_FROM_HTTP, 0, "Connect attempt timed out");
            closesocket(s);
            return INVALID_SOCKET;
        case -1:
            /* Ermm.. ?? */
            __xmlIOErr(XML_FROM_HTTP, 0, "Connect failed");
            closesocket(s);
            return INVALID_SOCKET;
    }

#ifndef HAVE_POLL_H
    if (FD_ISSET(s, &wfd)
#ifdef _WINSOCKAPI_
        || FD_ISSET(s, &xfd)
#endif
        )
#else /* !HAVE_POLL_H */
    if (p.revents == POLLOUT)
#endif /* !HAVE_POLL_H */
    {
        XML_SOCKLEN_T len;

        len = sizeof(status);
#ifdef SO_ERROR
        if (getsockopt(s, SOL_SOCKET, SO_ERROR, (char *) &status, &len) <
            0) {
            /* Solaris error code */
            __xmlIOErr(XML_FROM_HTTP, 0, "getsockopt failed\n");
            return INVALID_SOCKET;
        }
#endif
        if (status) {
            __xmlIOErr(XML_FROM_HTTP, 0,
                       "Error connecting to remote host");
            closesocket(s);
            errno = status;
            return INVALID_SOCKET;
        }
    } else {
        /* pbm */
        __xmlIOErr(XML_FROM_HTTP, 0, "select failed\n");
        closesocket(s);
        return INVALID_SOCKET;
    }

    return (s);
}

/**
* xmlNanoHTTPConnectHost:
* @host: the host name
* @port: the port number
*
* Attempt a connection to the given host:port endpoint. It tries
* the multiple IP provided by the DNS if available.
*
* Returns -1 in case of failure, the file descriptor number otherwise
*/

static SOCKET
xmlNanoHTTPConnectHost(const char *host, int port)
{
    struct hostent *h;
    struct sockaddr *addr = NULL;
    struct in_addr ia;
    struct sockaddr_in sockin;

#ifdef SUPPORT_IP6
    struct in6_addr ia6;
    struct sockaddr_in6 sockin6;
#endif
    int i;
    SOCKET s;

    memset (&sockin, 0, sizeof(sockin));
#ifdef SUPPORT_IP6
    memset (&sockin6, 0, sizeof(sockin6));
#endif

#if !defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && defined(RES_USE_INET6)
    if (have_ipv6 ())
    {
if (!(_res.options & RES_INIT))
res_init();
_res.options |= RES_USE_INET6;
    }
#endif

#if defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && !defined(_WIN32)
    if (have_ipv6 ())
#endif
#if defined(HAVE_GETADDRINFO) && (defined(SUPPORT_IP6) || defined(_WIN32))
    {
int status;
struct addrinfo hints, *res, *result;

result = NULL;
memset (&hints, 0,sizeof(hints));
hints.ai_socktype = SOCK_STREAM;

status = getaddrinfo (host, NULL, &hints, &result);
if (status) {
__xmlIOErr(XML_FROM_HTTP, 0, "getaddrinfo failed\n");
return INVALID_SOCKET;
}

for (res = result; res; res = res->ai_next) {
if (res->ai_family == AF_INET) {
if (res->ai_addrlen > sizeof(sockin)) {
__xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
freeaddrinfo (result);
return INVALID_SOCKET;
}
memcpy (&sockin, res->ai_addr, res->ai_addrlen);
sockin.sin_port = htons (port);
addr = (struct sockaddr *)&sockin;
#ifdef SUPPORT_IP6
} else if (have_ipv6 () && (res->ai_family == AF_INET6)) {
if (res->ai_addrlen > sizeof(sockin6)) {
__xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
freeaddrinfo (result);
return INVALID_SOCKET;
}
memcpy (&sockin6, res->ai_addr, res->ai_addrlen);
sockin6.sin6_port = htons (port);
addr = (struct sockaddr *)&sockin6;
#endif
} else
continue; /* for */

s = xmlNanoHTTPConnectAttempt (addr);
if (s != INVALID_SOCKET) {
freeaddrinfo (result);
return (s);
}
}

if (result)
freeaddrinfo (result);
    }
#endif
#if defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && !defined(_WIN32)
    else
#endif
#if !defined(HAVE_GETADDRINFO) || !defined(_WIN32)
    {
h = gethostbyname (host);
if (h == NULL) {

/*
* Okay, I got fed up by the non-portability of this error message
* extraction code. it work on Linux, if it work on your platform
* and one want to enable it, send me the defined(foobar) needed
*/
#if defined(HAVE_NETDB_H) && defined(HOST_NOT_FOUND) && defined(linux)
const char *h_err_txt = "";

switch (h_errno) {
case HOST_NOT_FOUND:
h_err_txt = "Authoritive host not found";
break;

case TRY_AGAIN:
h_err_txt =
"Non-authoritive host not found or server failure.";
break;

case NO_RECOVERY:
h_err_txt =
"Non-recoverable errors: FORMERR, REFUSED, or NOTIMP.";
break;

#ifdef NO_ADDRESS
case NO_ADDRESS:
h_err_txt =
"Valid name, no data record of requested type.";
break;
#endif

default:
h_err_txt = "No error text defined.";
break;
}
__xmlIOErr(XML_FROM_HTTP, 0, h_err_txt);
#else
__xmlIOErr(XML_FROM_HTTP, 0, "Failed to resolve host");
#endif
return INVALID_SOCKET;
}

for (i = 0; h->h_addr_list[i]; i++) {
if (h->h_addrtype == AF_INET) {
/* A records (IPv4) */
if ((unsigned int) h->h_length > sizeof(ia)) {
__xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
return INVALID_SOCKET;
}
memcpy (&ia, h->h_addr_list[i], h->h_length);
sockin.sin_family = h->h_addrtype;
sockin.sin_addr = ia;
sockin.sin_port = (unsigned short)htons ((unsigned short)port);
addr = (struct sockaddr *) &sockin;
#ifdef SUPPORT_IP6
} else if (have_ipv6 () && (h->h_addrtype == AF_INET6)) {
/* AAAA records (IPv6) */
if ((unsigned int) h->h_length > sizeof(ia6)) {
__xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
return INVALID_SOCKET;
}
memcpy (&ia6, h->h_addr_list[i], h->h_length);
sockin6.sin6_family = h->h_addrtype;
sockin6.sin6_addr = ia6;
sockin6.sin6_port = htons (port);
addr = (struct sockaddr *) &sockin6;
#endif
} else
break; /* for */

s = xmlNanoHTTPConnectAttempt (addr);
if (s != INVALID_SOCKET)
return (s);
}
    }
#endif

#ifdef DEBUG_HTTP
    xmlGenericError(xmlGenericErrorContext,
                    "xmlNanoHTTPConnectHost: unable to connect to '%s'.\n",
                    host);
#endif
    return INVALID_SOCKET;
}


/**
* xmlNanoHTTPOpen:
* @URL: The URL to load
* @contentType: if available the Content-Type information will be
* returned at that location
*
* This function try to open a connection to the indicated resource
* via HTTP GET.
*
* Returns NULL in case of failure, otherwise a request handler.
* The contentType, if provided must be freed by the caller
*/

void*
xmlNanoHTTPOpen(const char *URL, char **contentType) {
    if (contentType != NULL) *contentType = NULL;
    return(xmlNanoHTTPMethod(URL, NULL, NULL, contentType, NULL, 0));
}

/**
* xmlNanoHTTPOpenRedir:
* @URL: The URL to load
* @contentType: if available the Content-Type information will be
* returned at that location
* @redir: if available the redirected URL will be returned
*
* This function try to open a connection to the indicated resource
* via HTTP GET.
*
* Returns NULL in case of failure, otherwise a request handler.
* The contentType, if provided must be freed by the caller
*/

void*
xmlNanoHTTPOpenRedir(const char *URL, char **contentType, char **redir) {
    if (contentType != NULL) *contentType = NULL;
    if (redir != NULL) *redir = NULL;
    return(xmlNanoHTTPMethodRedir(URL, NULL, NULL, contentType, redir, NULL,0));
}

/**
* xmlNanoHTTPRead:
* @ctx: the HTTP context
* @dest: a buffer
* @len: the buffer length
*
* This function tries to read @len bytes from the existing HTTP connection
* and saves them in @dest. This is a blocking call.
*
* Returns the number of byte read. 0 is an indication of an end of connection.
* -1 indicates a parameter error.
*/
int
xmlNanoHTTPRead(void *ctx, void *dest, int len) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
#ifdef HAVE_ZLIB_H
    int bytes_read = 0;
    int orig_avail_in;
    int z_ret;
#endif

    if (ctx == NULL) return(-1);
    if (dest == NULL) return(-1);
    if (len <= 0) return(0);

#ifdef HAVE_ZLIB_H
    if (ctxt->usesGzip == 1) {
        if (ctxt->strm == NULL) return(0);
 
        ctxt->strm->next_out = dest;
        ctxt->strm->avail_out = len;
ctxt->strm->avail_in = ctxt->inptr - ctxt->inrptr;

        while (ctxt->strm->avail_out > 0 &&
(ctxt->strm->avail_in > 0 || xmlNanoHTTPRecv(ctxt) > 0)) {
            orig_avail_in = ctxt->strm->avail_in =
ctxt->inptr - ctxt->inrptr - bytes_read;
            ctxt->strm->next_in = BAD_CAST (ctxt->inrptr + bytes_read);

            z_ret = inflate(ctxt->strm, Z_NO_FLUSH);
            bytes_read += orig_avail_in - ctxt->strm->avail_in;

            if (z_ret != Z_OK) break;
}

        ctxt->inrptr += bytes_read;
        return(len - ctxt->strm->avail_out);
    }
#endif

    while (ctxt->inptr - ctxt->inrptr < len) {
        if (xmlNanoHTTPRecv(ctxt) <= 0) break;
    }
    if (ctxt->inptr - ctxt->inrptr < len)
        len = ctxt->inptr - ctxt->inrptr;
    memcpy(dest, ctxt->inrptr, len);
    ctxt->inrptr += len;
    return(len);
}

/**
* xmlNanoHTTPClose:
* @ctx: the HTTP context
*
* This function closes an HTTP context, it ends up the connection and
* free all data related to it.
*/
void
xmlNanoHTTPClose(void *ctx) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;

    if (ctx == NULL) return;

    xmlNanoHTTPFreeCtxt(ctxt);
}

/**
* xmlNanoHTTPMethodRedir:
* @URL: The URL to load
* @method: the HTTP method to use
* @input: the input string if any
* @contentType: the Content-Type information IN and OUT
* @redir: the redirected URL OUT
* @headers: the extra headers
* @ilen: input length
*
* This function try to open a connection to the indicated resource
* via HTTP using the given @method, adding the given extra headers
* and the input buffer for the request content.
*
* Returns NULL in case of failure, otherwise a request handler.
* The contentType, or redir, if provided must be freed by the caller
*/

void*
xmlNanoHTTPMethodRedir(const char *URL, const char *method, const char *input,
                  char **contentType, char **redir,
const char *headers, int ilen ) {
    xmlNanoHTTPCtxtPtr ctxt;
    char *bp, *p;
    int blen;
    SOCKET ret;
    int nbRedirects = 0;
    char *redirURL = NULL;
#ifdef DEBUG_HTTP
    int xmt_bytes;
#endif
    
    if (URL == NULL) return(NULL);
    if (method == NULL) method = "GET";
    xmlNanoHTTPInit();

retry:
    if (redirURL == NULL)
ctxt = xmlNanoHTTPNewCtxt(URL);
    else {
ctxt = xmlNanoHTTPNewCtxt(redirURL);
ctxt->location = xmlMemStrdup(redirURL);
    }

    if ( ctxt == NULL ) {
return ( NULL );
    }

    if ((ctxt->protocol == NULL) || (strcmp(ctxt->protocol, "http"))) {
__xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Not a valid HTTP URI");
        xmlNanoHTTPFreeCtxt(ctxt);
if (redirURL != NULL) xmlFree(redirURL);
        return(NULL);
    }
    if (ctxt->hostname == NULL) {
__xmlIOErr(XML_FROM_HTTP, XML_HTTP_UNKNOWN_HOST,
"Failed to identify host in URI");
        xmlNanoHTTPFreeCtxt(ctxt);
if (redirURL != NULL) xmlFree(redirURL);
        return(NULL);
    }
    if (proxy) {
blen = strlen(ctxt->hostname) * 2 + 16;
ret = xmlNanoHTTPConnectHost(proxy, proxyPort);
    }
    else {
blen = strlen(ctxt->hostname);
ret = xmlNanoHTTPConnectHost(ctxt->hostname, ctxt->port);
    }
    if (ret == INVALID_SOCKET) {
        xmlNanoHTTPFreeCtxt(ctxt);
if (redirURL != NULL) xmlFree(redirURL);
        return(NULL);
    }
    ctxt->fd = ret;

    if (input == NULL)
ilen = 0;
    else
blen += 36;

    if (headers != NULL)
blen += strlen(headers) + 2;
    if (contentType && *contentType)
/* reserve for string plus 'Content-Type: \r\n" */
blen += strlen(*contentType) + 16;
    if (ctxt->query != NULL)
/* 1 for '?' */
blen += strlen(ctxt->query) + 1;
    blen += strlen(method) + strlen(ctxt->path) + 24;
#ifdef HAVE_ZLIB_H
    /* reserve for possible 'Accept-Encoding: gzip' string */
    blen += 23;
#endif
    if (ctxt->port != 80) {
/* reserve space for ':xxxxx', incl. potential proxy */
if (proxy)
blen += 12;
else
blen += 6;
    }
    bp = (char*)xmlMallocAtomic(blen);
    if ( bp == NULL ) {
        xmlNanoHTTPFreeCtxt( ctxt );
xmlHTTPErrMemory("allocating header buffer");
return ( NULL );
    }

    p = bp;

    if (proxy) {
if (ctxt->port != 80) {
p += snprintf( p, blen - (p - bp), "%s http://%s:%d%s",
method, ctxt->hostname,
ctxt->port, ctxt->path );
}
else
p += snprintf( p, blen - (p - bp), "%s http://%s%s", method,
ctxt->hostname, ctxt->path);
    }
    else
p += snprintf( p, blen - (p - bp), "%s %s", method, ctxt->path);

    if (ctxt->query != NULL)
p += snprintf( p, blen - (p - bp), "?%s", ctxt->query);

    if (ctxt->port == 80) {
        p += snprintf( p, blen - (p - bp), " HTTP/1.0\r\nHost: %s\r\n",
ctxt->hostname);
    } else {
        p += snprintf( p, blen - (p - bp), " HTTP/1.0\r\nHost: %s:%d\r\n",
ctxt->hostname, ctxt->port);
    }

#ifdef HAVE_ZLIB_H
    p += snprintf(p, blen - (p - bp), "Accept-Encoding: gzip\r\n");
#endif

    if (contentType != NULL && *contentType)
p += snprintf(p, blen - (p - bp), "Content-Type: %s\r\n", *contentType);

    if (headers != NULL)
p += snprintf( p, blen - (p - bp), "%s", headers );

    if (input != NULL)
snprintf(p, blen - (p - bp), "Content-Length: %d\r\n\r\n", ilen );
    else
snprintf(p, blen - (p - bp), "\r\n");

#ifdef DEBUG_HTTP
    xmlGenericError(xmlGenericErrorContext,
"-> %s%s", proxy? "(Proxy) " : "", bp);
    if ((blen -= strlen(bp)+1) < 0)
xmlGenericError(xmlGenericErrorContext,
"ERROR: overflowed buffer by %d bytes\n", -blen);
#endif
    ctxt->outptr = ctxt->out = bp;
    ctxt->state = XML_NANO_HTTP_WRITE;
    blen = strlen( ctxt->out );
#ifdef DEBUG_HTTP
    xmt_bytes = xmlNanoHTTPSend(ctxt, ctxt->out, blen );
    if ( xmt_bytes != blen )
        xmlGenericError( xmlGenericErrorContext,
"xmlNanoHTTPMethodRedir: Only %d of %d %s %s\n",
xmt_bytes, blen,
"bytes of HTTP headers sent to host",
ctxt->hostname );
#else
    xmlNanoHTTPSend(ctxt, ctxt->out, blen );
#endif

    if ( input != NULL ) {
#ifdef DEBUG_HTTP
        xmt_bytes = xmlNanoHTTPSend( ctxt, input, ilen );

if ( xmt_bytes != ilen )
xmlGenericError( xmlGenericErrorContext,
"xmlNanoHTTPMethodRedir: Only %d of %d %s %s\n",
xmt_bytes, ilen,
"bytes of HTTP content sent to host",
ctxt->hostname );
#else
xmlNanoHTTPSend( ctxt, input, ilen );
#endif
    }

    ctxt->state = XML_NANO_HTTP_READ;

    while ((p = xmlNanoHTTPReadLine(ctxt)) != NULL) {
        if (*p == 0) {
ctxt->content = ctxt->inrptr;
xmlFree(p);
break;
}
xmlNanoHTTPScanAnswer(ctxt, p);

#ifdef DEBUG_HTTP
xmlGenericError(xmlGenericErrorContext, "<- %s\n", p);
#endif
        xmlFree(p);
    }

    if ((ctxt->location != NULL) && (ctxt->returnValue >= 300) &&
        (ctxt->returnValue < 400)) {
#ifdef DEBUG_HTTP
xmlGenericError(xmlGenericErrorContext,
"\nRedirect to: %s\n", ctxt->location);
#endif
while ( xmlNanoHTTPRecv(ctxt) > 0 ) ;
        if (nbRedirects < XML_NANO_HTTP_MAX_REDIR) {
nbRedirects++;
if (redirURL != NULL)
xmlFree(redirURL);
redirURL = xmlMemStrdup(ctxt->location);
xmlNanoHTTPFreeCtxt(ctxt);
goto retry;
}
xmlNanoHTTPFreeCtxt(ctxt);
if (redirURL != NULL) xmlFree(redirURL);
#ifdef DEBUG_HTTP
xmlGenericError(xmlGenericErrorContext,
"xmlNanoHTTPMethodRedir: Too many redirects, aborting ...\n");
#endif
return(NULL);
    }

    if (contentType != NULL) {
if (ctxt->contentType != NULL)
*contentType = xmlMemStrdup(ctxt->contentType);
else
*contentType = NULL;
    }

    if ((redir != NULL) && (redirURL != NULL)) {
*redir = redirURL;
    } else {
if (redirURL != NULL)
xmlFree(redirURL);
if (redir != NULL)
*redir = NULL;
    }

#ifdef DEBUG_HTTP
    if (ctxt->contentType != NULL)
xmlGenericError(xmlGenericErrorContext,
"\nCode %d, content-type '%s'\n\n",
ctxt->returnValue, ctxt->contentType);
    else
xmlGenericError(xmlGenericErrorContext,
"\nCode %d, no content-type\n\n",
ctxt->returnValue);
#endif

    return((void *) ctxt);
}

/**
* xmlNanoHTTPMethod:
* @URL: The URL to load
* @method: the HTTP method to use
* @input: the input string if any
* @contentType: the Content-Type information IN and OUT
* @headers: the extra headers
* @ilen: input length
*
* This function try to open a connection to the indicated resource
* via HTTP using the given @method, adding the given extra headers
* and the input buffer for the request content.
*
* Returns NULL in case of failure, otherwise a request handler.
* The contentType, if provided must be freed by the caller
*/

void*
xmlNanoHTTPMethod(const char *URL, const char *method, const char *input,
                  char **contentType, const char *headers, int ilen) {
    return(xmlNanoHTTPMethodRedir(URL, method, input, contentType,
NULL, headers, ilen));
}

/**
* xmlNanoHTTPFetch:
* @URL: The URL to load
* @filename: the filename where the content should be saved
* @contentType: if available the Content-Type information will be
* returned at that location
*
* This function try to fetch the indicated resource via HTTP GET
* and save it's content in the file.
*
* Returns -1 in case of failure, 0 incase of success. The contentType,
* if provided must be freed by the caller
*/
int
xmlNanoHTTPFetch(const char *URL, const char *filename, char **contentType) {
    void *ctxt = NULL;
    char *buf = NULL;
    int fd;
    int len;
    int ret = 0;

    if (filename == NULL) return(-1);
    ctxt = xmlNanoHTTPOpen(URL, contentType);
    if (ctxt == NULL) return(-1);

    if (!strcmp(filename, "-"))
        fd = 0;
    else {
        fd = open(filename, O_CREAT | O_WRONLY, 00644);
if (fd < 0) {
xmlNanoHTTPClose(ctxt);
if ((contentType != NULL) && (*contentType != NULL)) {
xmlFree(*contentType);
*contentType = NULL;
}
return(-1);
}
    }

    xmlNanoHTTPFetchContent( ctxt, &buf, &len );
    if ( len > 0 ) {
if (write(fd, buf, len) == -1) {
ret = -1;
}
    }

    xmlNanoHTTPClose(ctxt);
    close(fd);
    return(ret);
}

#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlNanoHTTPSave:
* @ctxt: the HTTP context
* @filename: the filename where the content should be saved
*
* This function saves the output of the HTTP transaction to a file
* It closes and free the context at the end
*
* Returns -1 in case of failure, 0 incase of success.
*/
int
xmlNanoHTTPSave(void *ctxt, const char *filename) {
    char *buf = NULL;
    int fd;
    int len;
    int ret = 0;

    if ((ctxt == NULL) || (filename == NULL)) return(-1);

    if (!strcmp(filename, "-"))
        fd = 0;
    else {
        fd = open(filename, O_CREAT | O_WRONLY, 0666);
if (fd < 0) {
xmlNanoHTTPClose(ctxt);
return(-1);
}
    }

    xmlNanoHTTPFetchContent( ctxt, &buf, &len );
    if ( len > 0 ) {
if (write(fd, buf, len) == -1) {
ret = -1;
}
    }

    xmlNanoHTTPClose(ctxt);
    close(fd);
    return(ret);
}
#endif /* LIBXML_OUTPUT_ENABLED */

/**
* xmlNanoHTTPReturnCode:
* @ctx: the HTTP context
*
* Get the latest HTTP return code received
*
* Returns the HTTP return code for the request.
*/
int
xmlNanoHTTPReturnCode(void *ctx) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;

    if (ctxt == NULL) return(-1);

    return(ctxt->returnValue);
}

/**
* xmlNanoHTTPAuthHeader:
* @ctx: the HTTP context
*
* Get the authentication header of an HTTP context
*
* Returns the stashed value of the WWW-Authenticate or Proxy-Authenticate
* header.
*/
const char *
xmlNanoHTTPAuthHeader(void *ctx) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;

    if (ctxt == NULL) return(NULL);

    return(ctxt->authHeader);
}

/**
* xmlNanoHTTPContentLength:
* @ctx: the HTTP context
*
* Provides the specified content length from the HTTP header.
*
* Return the specified content length from the HTTP header. Note that
* a value of -1 indicates that the content length element was not included in
* the response header.
*/
int
xmlNanoHTTPContentLength( void * ctx ) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;

    return ( ( ctxt == NULL ) ? -1 : ctxt->ContentLength );
}

/**
* xmlNanoHTTPRedir:
* @ctx: the HTTP context
*
* Provides the specified redirection URL if available from the HTTP header.
*
* Return the specified redirection URL or NULL if not redirected.
*/
const char *
xmlNanoHTTPRedir( void * ctx ) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;

    return ( ( ctxt == NULL ) ? NULL : ctxt->location );
}

/**
* xmlNanoHTTPEncoding:
* @ctx: the HTTP context
*
* Provides the specified encoding if specified in the HTTP headers.
*
* Return the specified encoding or NULL if not available
*/
const char *
xmlNanoHTTPEncoding( void * ctx ) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;

    return ( ( ctxt == NULL ) ? NULL : ctxt->encoding );
}

/**
* xmlNanoHTTPMimeType:
* @ctx: the HTTP context
*
* Provides the specified Mime-Type if specified in the HTTP headers.
*
* Return the specified Mime-Type or NULL if not available
*/
const char *
xmlNanoHTTPMimeType( void * ctx ) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;

    return ( ( ctxt == NULL ) ? NULL : ctxt->mimeType );
}

/**
* xmlNanoHTTPFetchContent:
* @ctx: the HTTP context
* @ptr: pointer to set to the content buffer.
* @len: integer pointer to hold the length of the content
*
* Check if all the content was read
*
* Returns 0 if all the content was read and available, returns
* -1 if received content length was less than specified or an error
* occurred.
*/
static int
xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len ) {
    xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;

    int rc = 0;
    int cur_lgth;
    int rcvd_lgth;
    int dummy_int;
    char * dummy_ptr = NULL;

    /* Dummy up return input parameters if not provided */

    if ( len == NULL )
        len = &dummy_int;

    if ( ptr == NULL )
        ptr = &dummy_ptr;

    /* But can't work without the context pointer */

    if ( ( ctxt == NULL ) || ( ctxt->content == NULL ) ) {
        *len = 0;
*ptr = NULL;
return ( -1 );
    }

    rcvd_lgth = ctxt->inptr - ctxt->content;

    while ( (cur_lgth = xmlNanoHTTPRecv( ctxt )) > 0 ) {

rcvd_lgth += cur_lgth;
if ( (ctxt->ContentLength > 0) && (rcvd_lgth >= ctxt->ContentLength) )
break;
    }

    *ptr = ctxt->content;
    *len = rcvd_lgth;

    if ( ( ctxt->ContentLength > 0 ) && ( rcvd_lgth < ctxt->ContentLength ) )
        rc = -1;
    else if ( rcvd_lgth == 0 )
rc = -1;

    return ( rc );
}

#ifdef STANDALONE
int main(int argc, char **argv) {
    char *contentType = NULL;

    if (argv[1] != NULL) {
if (argv[2] != NULL)
xmlNanoHTTPFetch(argv[1], argv[2], &contentType);
        else
xmlNanoHTTPFetch(argv[1], "-", &contentType);
if (contentType != NULL) xmlFree(contentType);
    } else {
        xmlGenericError(xmlGenericErrorContext,
"%s: minimal HTTP GET implementation\n", argv[0]);
        xmlGenericError(xmlGenericErrorContext,
"\tusage %s [ URL [ filename ] ]\n", argv[0]);
    }
    xmlNanoHTTPCleanup();
    xmlMemoryDump();
    return(0);
}
#endif /* STANDALONE */
#else /* !LIBXML_HTTP_ENABLED */
#ifdef STANDALONE
#include <stdio.h>
int main(int argc, char **argv) {
    xmlGenericError(xmlGenericErrorContext,
"%s : HTTP support not compiled in\n", argv[0]);
    return(0);
}
#endif /* STANDALONE */
#endif /* LIBXML_HTTP_ENABLED */
#define bottom_nanohttp
#include "elfgcchack.h"
Something went wrong with that request. Please try again.