/usr/share/ada/adainclude/aws/aws-server-push.adb is in libaws3.2.0-dev 3.2.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 | ------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2000-2013, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This library is distributed in the hope that it will be --
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
------------------------------------------------------------------------------
pragma Ada_2012;
with Ada.Calendar;
with Ada.Containers.Doubly_Linked_Lists;
with Ada.Real_Time;
with Ada.Text_IO;
with Ada.Unchecked_Deallocation;
with AWS.Config;
with AWS.Messages;
with AWS.MIME;
with AWS.Net.Buffered;
with AWS.Net.Generic_Sets;
with AWS.Net.Log;
with AWS.Translator;
with AWS.Utils;
package body AWS.Server.Push is
use Ada;
use Ada.Exceptions;
use AWS.Net;
type Phase_Type is (Available, Going, Waiting);
-- Available when the socket is not in the waiting poll.
-- Going when the socket is in process to be placed into waiting poll.
-- Waiting when the socket is in the waiting poll.
type Action_Type is (Add, Remove, Shutdown, Deallocate);
-- Command to server push waiter
type Client_Holder is record
Socket : Net.Socket_Access;
Kind : Mode;
Created : Real_Time.Time;
Environment : Client_Environment;
Groups : Group_Sets.Set;
Chunks : Chunk_Lists.List;
Chunk_Sent : Natural;
Thin : Thin_Indexes.Map;
Phase : Phase_Type;
Timeout : Real_Time.Time_Span;
Errmsg : Unbounded_String; -- Filled on socket error in waiter
end record;
function To_Holder
(Socket : Net.Socket_Access;
Environment : Client_Environment;
Kind : Mode;
Groups : Group_Set;
Timeout : Duration) return Client_Holder_Access;
procedure Free
(Holder : in out Client_Holder_Access; Socket : Boolean := True);
procedure Unchecked_Free is
new Unchecked_Deallocation (Tables.Map, Map_Access);
procedure Release
(Server : in out Object;
Close_Sockets : Boolean;
Left_Open : Boolean;
Get_Final_Data : access function
(Holder : not null access Client_Holder)
return Stream_Element_Array := null);
procedure Add_To_Groups
(Groups : in out Group_Map;
Group_Name : String;
Client_Id : String;
Holder : Client_Holder_Access);
procedure Register
(Server : in out Object;
Client_Id : Client_Key;
Holder : in out Client_Holder_Access;
Init_Data : Stream_Element_Array;
Content_Type : String;
Duplicated_Age : Duration;
Ext_Sock_Alloc : Boolean);
-- Internal register routine
function Data_Chunk
(Holder : not null access Client_Holder;
Data : Client_Output_Type;
Content_Type : String) return Stream_Element_Array;
procedure Get_Data
(Holder : in out Client_Holder;
Data : out Stream_Element_Array;
Last : out Stream_Element_Offset);
procedure Waiter_Command
(Server : in out Object;
Holder : Client_Holder_Access;
Action : Action_Type);
procedure Waiter_Signal;
procedure Waiter_Pause;
procedure Waiter_Resume;
No_Servers : not null access procedure := Null_Procedure'Access;
First_Server : not null access procedure := Null_Procedure'Access;
New_Line : constant String := ASCII.CR & ASCII.LF;
-- HTTP new line
Byte0 : constant Stream_Element_Array := (1 => 0);
Boundary : constant String :=
"AWS.Push.Boundary_" & Utils.Random_String (8);
-- This is the multi-part boundary string used by AWS push server
Delimiter : constant String := "--" & Boundary & New_Line;
-- And the corresponding delimiter
W_Signal : aliased Net.Socket_Type'Class := Net.Socket (Security => False);
-- Socket to signal waiter to do to select task entries
Internal_Error_Handler : Error_Handler := Text_IO.Put_Line'Access;
type Object_Access is access all Object;
type Waiter_Queue_Element is record
Server : Object_Access;
Holder : Client_Holder_Access;
Action : Action_Type;
end record;
package Waiter_Queues is
new Ada.Containers.Doubly_Linked_Lists (Waiter_Queue_Element);
protected Waiter_Queue is
procedure Add (Item : Waiter_Queue_Element);
procedure Add (Queue : Waiter_Queues.List);
procedure Get (Queue : out Waiter_Queues.List);
private
Queue : Waiter_Queues.List;
end Waiter_Queue;
protected Waiter_Information is
procedure Info
(Size : out Natural;
Max_Size : out Natural;
Max_Size_DT : out Ada.Calendar.Time;
Counter : out Wait_Counter_Type);
entry Empty;
procedure Set_Size (Size : Positive; Counter : Wait_Counter_Type);
private
Size : Positive := 1;
Max_Size : Positive := 1;
Max_Size_DT : Ada.Calendar.Time := Ada.Calendar.Clock;
Counter : Wait_Counter_Type := 0;
end Waiter_Information;
task Waiter with Priority => AWS.Config.Service_Priority is
entry Resume;
end Waiter;
-------------------
-- Add_To_Groups --
-------------------
procedure Add_To_Groups
(Groups : in out Group_Map;
Group_Name : String;
Client_Id : String;
Holder : Client_Holder_Access)
is
Cursor : constant Group_Maps.Cursor := Groups.Find (Group_Name);
Map : Map_Access;
begin
if Group_Maps.Has_Element (Cursor) then
Map := Group_Maps.Element (Cursor);
else
Map := new Tables.Map;
Groups.Insert (Group_Name, Map);
end if;
Map.Insert (Client_Id, Holder);
end Add_To_Groups;
-----------
-- Count --
-----------
function Count (Server : Object) return Natural is
begin
return Server.Count;
end Count;
----------------
-- Data_Chunk --
----------------
function Data_Chunk
(Holder : not null access Client_Holder;
Data : Client_Output_Type;
Content_Type : String) return Stream_Element_Array
is
Data_To_Send : constant Stream_Element_Array :=
To_Stream_Array (Data, Holder.Environment);
-- Data to send, will be sent with a prefix and suffix
function Prefix return String;
-- Message prefix
function Suffix return String;
-- Message suffix
------------
-- Prefix --
------------
function Prefix return String is
begin
case Holder.Kind is
when Multipart =>
Holder.Chunk_Sent := Holder.Chunk_Sent + 1;
if Holder.Chunk_Sent = 1 then
return Delimiter & Messages.Content_Type (Content_Type)
& New_Line & New_Line;
else
return Messages.Content_Type (Content_Type)
& New_Line & New_Line;
end if;
when Chunked =>
return Utils.Hex (Data_To_Send'Size / System.Storage_Unit)
& New_Line;
when Plain =>
return "";
end case;
end Prefix;
------------
-- Suffix --
------------
function Suffix return String is
begin
case Holder.Kind is
when Multipart =>
return New_Line & New_Line & Delimiter;
when Chunked =>
return New_Line;
when Plain =>
return "";
end case;
end Suffix;
begin
if Data_To_Send'Length > 0 then
return Translator.To_Stream_Element_Array (Prefix) & Data_To_Send
& Translator.To_Stream_Element_Array (Suffix);
else
return (1 .. 0 => 0);
end if;
end Data_Chunk;
----------
-- Free --
----------
procedure Free
(Holder : in out Client_Holder_Access; Socket : Boolean := True)
is
procedure Unchecked_Free is
new Unchecked_Deallocation (Client_Holder, Client_Holder_Access);
begin
if Socket then
Net.Free (Holder.Socket);
end if;
Unchecked_Free (Holder);
end Free;
--------------
-- Get_Data --
--------------
procedure Get_Data
(Holder : in out Client_Holder;
Data : out Stream_Element_Array;
Last : out Stream_Element_Offset)
is
C : Chunk_Lists.Cursor := Holder.Chunks.First;
begin
pragma Assert (Data'First = 1);
Last := Data'First - 1;
while Chunk_Lists.Has_Element (C) loop
declare
Message : constant Message_Type := Chunk_Lists.Element (C);
Next : constant Stream_Element_Offset :=
Last + Message.Data'Last;
begin
if Next > Data'Last then
if Last < Data'First then
-- Too big single message need to send partially
Data := Message.Data (1 .. Data'Last);
Last := Data'Last;
if Message.Thin /= "" then
Holder.Thin.Delete (Message.Thin);
end if;
Holder.Chunks.Replace_Element
(C,
(Size => Message.Data'Length - Data'Length,
Thin_Size => 0,
Data =>
Message.Data (Last + 1 .. Message.Data'Last),
Thin => ""));
end if;
exit;
end if;
Data (Last + 1 .. Next) := Message.Data;
Last := Next;
if Message.Thin /= "" then
Holder.Thin.Delete (Message.Thin);
end if;
Holder.Chunks.Delete (C);
C := Holder.Chunks.First;
end;
end loop;
end Get_Data;
----------
-- Info --
----------
procedure Info
(Size : out Natural;
Max_Size : out Natural;
Max_Size_DT : out Ada.Calendar.Time;
Counter : out Wait_Counter_Type) is
begin
Waiter_Information.Info
(Size => Size,
Max_Size => Max_Size,
Max_Size_DT => Max_Size_DT,
Counter => Counter);
end Info;
procedure Info
(Server : in out Object;
Clients : out Natural;
Groups : out Natural;
Process : access procedure
(Client_Id : Client_Key;
Address : String;
State : String;
Environment : Client_Environment;
Kind : Mode;
Groups : Group_Set) := null) is
begin
Server.Info (Clients, Group_Count => Groups, Process => Process);
end Info;
-------------
-- Is_Open --
-------------
function Is_Open (Server : Object) return Boolean is
begin
return Server.Is_Open;
end Is_Open;
------------
-- Object --
------------
protected body Object is
procedure Send_Data
(Holder : in out Client_Holder_Access;
Data : Client_Output_Type;
Content_Type : String;
Thin_Id : String);
-- Send Data to a client identified by Holder.
-- If Holder out value is not null it mean that socket become busy
-- waiting for output availability and we have to move it into Waiter.
-- Holder out value could be not null in case of socket error on
-- previous socket operations in waiter.
procedure Unregister (Cursor : in out Tables.Cursor);
-----------
-- Count --
-----------
function Count return Natural is
begin
return Natural (Container.Length);
end Count;
--------------
-- Get_Data --
--------------
procedure Get_Data
(Holder : Client_Holder_Access;
Data : out Stream_Element_Array;
Last : out Stream_Element_Offset) is
begin
pragma Assert (Holder.Phase = Waiting);
Get_Data (Holder.all, Data, Last);
if Last < Data'First then
Holder.Phase := Available;
end if;
end Get_Data;
----------
-- Info --
----------
procedure Info
(Client_Count : out Natural;
Group_Count : out Natural;
Process : access procedure
(Client_Id : Client_Key;
Address : String;
State : String;
Environment : Client_Environment;
Kind : Mode;
Groups : Group_Set))
is
procedure Action (C : Tables.Cursor);
------------
-- Action --
------------
procedure Action (C : Tables.Cursor) is
CA : constant Client_Holder_Access := Tables.Element (C);
Groups : Group_Set (1 .. Integer (CA.Groups.Length));
CG : Group_Sets.Cursor := CA.Groups.First;
G : Group_Maps.Cursor;
function Get_Peer_Addr return String;
-------------------
-- Get_Peer_Addr --
-------------------
function Get_Peer_Addr return String is
begin
return Peer_Addr (CA.Socket.all);
exception
when E : Net.Socket_Error =>
return Exception_Message (E);
end Get_Peer_Addr;
begin
for J in Groups'Range loop
if Process /= null then
Groups (J) := To_Unbounded_String (Group_Sets.Element (CG));
end if;
G := Object.Groups.Find (Group_Sets.Element (CG));
if not Group_Maps.Has_Element (G) then
raise Program_Error with
"Not found group " & Group_Sets.Element (CG)
& " for client";
end if;
if Group_Maps.Element (G).Element (Tables.Key (C)) /= CA then
raise Program_Error with "Loose client in group";
end if;
CG := Group_Sets.Next (CG);
end loop;
if Process /= null then
Process
(Tables.Key (C),
Get_Peer_Addr,
Phase_Type'Image (CA.Phase) & ' ' & To_String (CA.Errmsg),
CA.Environment,
CA.Kind,
Groups);
end if;
end Action;
C : Tables.Cursor := Container.First;
G : Group_Maps.Cursor;
begin -- Info
Container.Iterate (Action'Access);
G := Groups.First;
while Group_Maps.Has_Element (G) loop
C := Group_Maps.Element (G).First;
while Tables.Has_Element (C) loop
if
not Tables.Element (C).Groups.Contains (Group_Maps.Key (G))
then
raise Program_Error with "Loose group in client";
end if;
C := Tables.Next (C);
end loop;
G := Group_Maps.Next (G);
end loop;
Group_Count := Integer (Groups.Length);
Client_Count := Integer (Container.Length);
end Info;
-------------
-- Is_Open --
-------------
function Is_Open return Boolean is
begin
return Open;
end Is_Open;
--------------
-- Register --
--------------
procedure Register
(Client_Id : Client_Key;
Holder : in out Client_Holder_Access;
Duplicated : out Client_Holder_Access;
Duplicated_Age : Duration;
Ext_Sock_Alloc : Boolean)
is
use Real_Time;
procedure Add_To_Groups (J : Group_Sets.Cursor);
-------------------
-- Add_To_Groups --
-------------------
procedure Add_To_Groups (J : Group_Sets.Cursor) is
begin
Add_To_Groups (Groups, Group_Sets.Element (J), Client_Id, Holder);
end Add_To_Groups;
Cursor : Tables.Cursor;
Success : Boolean;
begin
if not Open then
Free (Holder, Socket => not Ext_Sock_Alloc);
raise Closed;
end if;
Container.Insert (Client_Id, Holder, Cursor, Success);
if Success then
Duplicated := null;
else
Duplicated := Tables.Element (Cursor);
if To_Time_Span (Duplicated_Age) < Clock - Duplicated.Created then
Unregister (Cursor);
Container.Insert (Client_Id, Holder);
else
Free (Holder, Socket => not Ext_Sock_Alloc);
raise Duplicate_Client_Id;
end if;
end if;
Holder.Phase := Going;
Holder.Groups.Iterate (Add_To_Groups'Access);
end Register;
-------------
-- Restart --
-------------
procedure Restart is
begin
Open := True;
end Restart;
----------
-- Send --
----------
procedure Send
(Data : Client_Output_Type;
Group_Id : String;
Content_Type : String;
Thin_Id : String;
Queue : out Tables.Map)
is
Cursor : Tables.Cursor;
Next : Tables.Cursor;
Holder : Client_Holder_Access;
begin
if Group_Id = "" then
Cursor := Container.First;
else
declare
use Group_Maps;
C : constant Group_Maps.Cursor := Groups.Find (Group_Id);
begin
if not Has_Element (C) then
return;
end if;
Cursor := Element (C).First;
end;
end if;
Queue.Clear;
while Tables.Has_Element (Cursor) loop
Holder := Tables.Element (Cursor);
Next := Tables.Next (Cursor);
Send_Data (Holder, Data, Content_Type, Thin_Id);
if Holder /= null then
Queue.Insert (Tables.Key (Cursor), Holder);
if Holder.Errmsg /= Null_Unbounded_String then
if Group_Id /= "" then
-- Cursor have to be from Containers
Cursor := Container.Find (Tables.Key (Cursor));
end if;
Unregister (Cursor);
end if;
end if;
Cursor := Next;
end loop;
end Send;
---------------
-- Send_Data --
---------------
procedure Send_Data
(Holder : in out Client_Holder_Access;
Data : Client_Output_Type;
Content_Type : String;
Thin_Id : String)
is
Events : Net.Event_Set;
procedure To_Buffer;
---------------
-- To_Buffer --
---------------
procedure To_Buffer is
Chunk : constant Stream_Element_Array :=
Data_Chunk (Holder, Data, Content_Type);
CT : Thin_Indexes.Cursor;
begin
if Thin_Id /= "" then
CT := Holder.Thin.Find (Thin_Id);
end if;
if Thin_Indexes.Has_Element (CT) then
Holder.Chunks.Replace_Element
(Thin_Indexes.Element (CT),
(Size => Chunk'Length,
Thin_Size => Thin_Id'Length,
Data => Chunk,
Thin => Thin_Id));
else
Holder.Chunks.Append
((Size => Chunk'Length,
Thin_Size => Thin_Id'Length,
Data => Chunk,
Thin => Thin_Id));
if Thin_Id /= "" then
Holder.Thin.Insert (Thin_Id, Holder.Chunks.Last);
end if;
end if;
end To_Buffer;
begin
if not Open then
raise Closed;
end if;
if Holder.Phase = Available then
if Holder.Errmsg /= Null_Unbounded_String then
return;
end if;
if not Holder.Chunks.Is_Empty then
raise Program_Error;
end if;
-- Net.Check is not blocking operation
begin
Events := Holder.Socket.Check ((others => True));
exception
when E : Socket_Error =>
-- !!! Most possible it is ENOBUFS or ENOMEM error
-- because of too many open sockets. We should see the exact
-- error in the socket error log file.
Holder.Errmsg := To_Unbounded_String (Exception_Message (E));
Events := (others => False);
end;
if Events (Error) then
Holder.Errmsg :=
To_Unbounded_String
("Check server push output error "
& Utils.Image (Net.Errno (Holder.Socket.all)));
Net.Log.Error (Holder.Socket.all, To_String (Holder.Errmsg));
elsif Events (Input) then
-- Need to understand closed socket from peer
declare
Unexpect : Stream_Element_Array (1 .. 64);
Last : Stream_Element_Offset;
begin
Holder.Socket.Receive (Unexpect, Last);
Holder.Errmsg :=
To_Unbounded_String
("Unexpected data from server push socket: "
& Translator.To_String (Unexpect (1 .. Last)));
Net.Log.Error (Holder.Socket.all, To_String (Holder.Errmsg));
exception
when E : Socket_Error =>
Holder.Errmsg :=
To_Unbounded_String (Exception_Message (E));
end;
elsif Events (Output) then
declare
Chunk : constant Stream_Element_Array :=
Data_Chunk (Holder, Data, Content_Type);
Last : Stream_Element_Offset;
begin
-- It is not blocking Net.Send operation
Holder.Socket.Send (Chunk, Last);
if Last = Chunk'Last then
-- Data sent completely
Holder := null;
elsif Last in Chunk'Range then
-- Data sent partially
Holder.Chunks.Append
((Size => Chunk'Last - Last,
Thin_Size => 0,
Data => Chunk (Last + 1 .. Chunk'Last),
Thin => ""));
Holder.Phase := Going;
else
-- Data not sent. Strange, because Check routine did
-- show output availability.
To_Buffer;
Holder.Phase := Going;
end if;
exception
when E : Net.Socket_Error =>
Holder.Errmsg :=
To_Unbounded_String (Exception_Message (E));
end;
else
To_Buffer;
-- We would return Holder not null to move it to Waiter
Holder.Phase := Going;
end if;
else
To_Buffer;
Holder := null;
end if;
end Send_Data;
-------------
-- Send_To --
-------------
procedure Send_To
(Client_Id : Client_Key;
Data : Client_Output_Type;
Content_Type : String;
Thin_Id : String;
Holder : out Client_Holder_Access)
is
Cursor : Tables.Cursor := Container.Find (Client_Id);
begin
if Tables.Has_Element (Cursor) then
Holder := Tables.Element (Cursor);
Send_Data (Holder, Data, Content_Type, Thin_Id);
if Holder /= null
and then Holder.Errmsg /= Null_Unbounded_String
then
Unregister (Cursor);
end if;
else
raise Client_Gone with "No such client id '" & Client_Id & ''';
end if;
end Send_To;
--------------
-- Shutdown --
--------------
procedure Shutdown
(Final_Data : Client_Output_Type;
Final_Content_Type : String;
Queue : out Tables.Map) is
begin
Send (Final_Data, "", Final_Content_Type, "", Queue);
Open := False;
end Shutdown;
-----------------------
-- Shutdown_If_Empty --
-----------------------
procedure Shutdown_If_Empty (Open : out Boolean) is
use type Ada.Containers.Count_Type;
begin
if Container.Length = 0 then
Object.Open := False;
end if;
Shutdown_If_Empty.Open := Object.Open;
end Shutdown_If_Empty;
---------------
-- Subscribe --
---------------
procedure Subscribe (Client_Id : Client_Key; Group_Id : String) is
procedure Modify
(Key : String; Element : in out Client_Holder_Access);
------------
-- Modify --
------------
procedure Modify
(Key : String; Element : in out Client_Holder_Access)
is
CI : Group_Sets.Cursor;
Success : Boolean;
begin
Element.Groups.Insert (Group_Id, CI, Success);
if Success then
Add_To_Groups (Groups, Group_Id, Key, Element);
end if;
end Modify;
Cursor : constant Tables.Cursor := Container.Find (Client_Id);
begin
if Tables.Has_Element (Cursor) then
Container.Update_Element (Cursor, Modify'Access);
end if;
end Subscribe;
--------------------
-- Subscribe_Copy --
--------------------
procedure Subscribe_Copy (Source : String; Target : String) is
CG : Group_Maps.Cursor;
procedure Process (C : Tables.Cursor);
-------------
-- Process --
-------------
procedure Process (C : Tables.Cursor) is
Element : constant Client_Holder_Access := Tables.Element (C);
CI : Group_Sets.Cursor;
Success : Boolean;
begin
Element.Groups.Insert (Target, CI, Success);
if Success then
Add_To_Groups (Groups, Target, Tables.Key (C), Element);
end if;
end Process;
begin
if Source = "" then
Container.Iterate (Process'Access);
else
CG := Groups.Find (Source);
if Group_Maps.Has_Element (CG) then
Group_Maps.Element (CG).Iterate (Process'Access);
end if;
end if;
end Subscribe_Copy;
----------------
-- Unregister --
----------------
procedure Unregister (Cursor : in out Tables.Cursor) is
Holder : constant Client_Holder_Access := Tables.Element (Cursor);
Key : constant String := Tables.Key (Cursor);
procedure Delete_Group (J : Group_Sets.Cursor);
------------------
-- Delete_Group --
------------------
procedure Delete_Group (J : Group_Sets.Cursor) is
use type Ada.Containers.Count_Type;
C : Group_Maps.Cursor := Groups.Find (Group_Sets.Element (J));
Map : Map_Access := Group_Maps.Element (C);
begin
Tables.Delete (Map.all, Key);
if Map.Length = 0 then
Groups.Delete (C);
Unchecked_Free (Map);
end if;
end Delete_Group;
begin
Container.Delete (Cursor);
Holder.Groups.Iterate (Delete_Group'Access);
end Unregister;
procedure Unregister
(Client_Id : Client_Key; Holder : out Client_Holder_Access)
is
Cursor : Tables.Cursor;
begin
Cursor := Container.Find (Client_Id);
if Tables.Has_Element (Cursor) then
Holder := Tables.Element (Cursor);
Unregister (Cursor);
else
Holder := null;
end if;
end Unregister;
------------------------
-- Unregister_Clients --
------------------------
procedure Unregister_Clients (Queue : out Tables.Map; Open : Boolean) is
Cursor : Tables.Cursor;
begin
Object.Open := Unregister_Clients.Open;
Queue.Clear;
loop
Cursor := Container.First;
exit when not Tables.Has_Element (Cursor);
Queue.Insert (Tables.Key (Cursor), Tables.Element (Cursor));
Unregister (Cursor);
end loop;
end Unregister_Clients;
-----------------
-- Unsubscribe --
-----------------
procedure Unsubscribe (Client_Id : Client_Key; Group_Id : String) is
procedure Modify
(Key : String; Element : in out Client_Holder_Access);
------------
-- Modify --
------------
procedure Modify
(Key : String; Element : in out Client_Holder_Access)
is
pragma Unreferenced (Key);
use type Ada.Containers.Count_Type;
Cursor : Group_Sets.Cursor := Element.Groups.Find (Group_Id);
CG : Group_Maps.Cursor;
Group : Map_Access;
begin
if Group_Sets.Has_Element (Cursor) then
Element.Groups.Delete (Cursor);
CG := Groups.Find (Group_Id);
Group := Group_Maps.Element (CG);
Group.Delete (Client_Id);
if Group.Length = 0 then
Groups.Delete (CG);
Unchecked_Free (Group);
end if;
end if;
end Modify;
Cursor : constant Tables.Cursor := Container.Find (Client_Id);
begin
if Tables.Has_Element (Cursor) then
Container.Update_Element (Cursor, Modify'Access);
end if;
end Unsubscribe;
----------------------
-- Unsubscribe_Copy --
----------------------
procedure Unsubscribe_Copy (Source : String; Target : String) is
use type Ada.Containers.Count_Type;
CG : Group_Maps.Cursor := Groups.Find (Target);
CF : Tables.Cursor;
Group : Map_Access;
Client : Client_Holder_Access;
begin
if not Group_Maps.Has_Element (CG) then
return;
end if;
Group := Group_Maps.Element (CG);
CF := Group.First;
while Tables.Has_Element (CF) loop
Client := Tables.Element (CF);
if Source = "" or else Client.Groups.Contains (Source) then
declare
CN : constant Tables.Cursor := Tables.Next (CF);
begin
Client.Groups.Delete (Target);
Group.Delete (CF);
CF := CN;
end;
else
CF := Tables.Next (CF);
end if;
end loop;
if Group.Length = 0 then
Groups.Delete (CG);
Unchecked_Free (Group);
end if;
end Unsubscribe_Copy;
------------------
-- Waiter_Error --
------------------
procedure Waiter_Error
(Holder : Client_Holder_Access; Message : String) is
begin
pragma Assert (Holder.Phase = Waiting);
Holder.Errmsg := To_Unbounded_String (Message);
Holder.Phase := Available;
end Waiter_Error;
end Object;
--------------
-- Register --
--------------
procedure Register
(Server : in out Object;
Client_Id : Client_Key;
Holder : in out Client_Holder_Access;
Init_Data : Stream_Element_Array;
Content_Type : String;
Duplicated_Age : Duration;
Ext_Sock_Alloc : Boolean)
is
Duplicated : Client_Holder_Access;
function Content_Type_Header return String;
-------------------------
-- Content_Type_Header --
-------------------------
function Content_Type_Header return String is
begin
if Content_Type = "" then
return "";
else
return Messages.Content_Type (Content_Type) & New_Line;
end if;
end Content_Type_Header;
begin
Server.Register
(Client_Id, Holder, Duplicated, Duplicated_Age, Ext_Sock_Alloc);
if Duplicated /= null then
if Duplicated.Phase = Available then
Duplicated.Socket.Shutdown;
Free (Duplicated);
else
Waiter_Command (Server, Duplicated, Shutdown);
end if;
end if;
begin
Net.Buffered.Put_Line
(Holder.Socket.all,
"HTTP/1.1 200 OK" & New_Line
& "Server: AWS (Ada Web Server) v" & Version & New_Line
& Messages.Connection ("Close"));
if Holder.Kind = Chunked then
Net.Buffered.Put_Line
(Holder.Socket.all,
Content_Type_Header & Messages.Transfer_Encoding ("chunked")
& New_Line);
elsif Holder.Kind = Multipart then
Net.Buffered.Put_Line
(Holder.Socket.all,
Messages.Content_Type (MIME.Multipart_X_Mixed_Replace, Boundary)
& New_Line);
else
Net.Buffered.Put_Line (Holder.Socket.all, Content_Type_Header);
end if;
Net.Buffered.Write (Holder.Socket.all, Init_Data);
Net.Buffered.Flush (Holder.Socket.all);
Waiter_Command (Server, Holder, Add);
exception
when E : others =>
Server.Unregister (Client_Id, Holder);
Net.Log.Error
(Holder.Socket.all,
"Server push write header error "
& Ada.Exceptions.Exception_Information (E));
Holder.Socket.Shutdown;
Free (Holder);
end;
Socket_Taken;
end Register;
procedure Register
(Server : in out Object;
Client_Id : Client_Key;
Socket : Net.Socket_Access;
Environment : Client_Environment;
Init_Data : Client_Output_Type;
Init_Content_Type : String := "";
Kind : Mode := Plain;
Duplicated_Age : Duration := Duration'Last;
Groups : Group_Set := Empty_Group;
Timeout : Duration := Default.Send_Timeout)
is
Holder : Client_Holder_Access :=
To_Holder (Socket, Environment, Kind, Groups, Timeout);
begin
Register
(Server,
Client_Id,
Holder,
Data_Chunk (Holder, Init_Data, Init_Content_Type),
Init_Content_Type,
Duplicated_Age,
Ext_Sock_Alloc => True);
end Register;
procedure Register
(Server : in out Object;
Client_Id : Client_Key;
Socket : Net.Socket_Type'Class;
Environment : Client_Environment;
Init_Data : Client_Output_Type;
Init_Content_Type : String := "";
Kind : Mode := Plain;
Duplicated_Age : Duration := Duration'Last;
Groups : Group_Set := Empty_Group;
Timeout : Duration := Default.Send_Timeout)
is
Holder : Client_Holder_Access :=
To_Holder
(new Socket_Type'Class'(Socket), Environment, Kind, Groups,
Timeout);
begin
Register
(Server,
Client_Id,
Holder,
Data_Chunk (Holder, Init_Data, Init_Content_Type),
Init_Content_Type,
Duplicated_Age,
Ext_Sock_Alloc => False);
end Register;
procedure Register
(Server : in out Object;
Client_Id : Client_Key;
Socket : Net.Socket_Type'Class;
Environment : Client_Environment;
Content_Type : String := "";
Kind : Mode := Plain;
Duplicated_Age : Duration := Duration'Last;
Groups : Group_Set := Empty_Group;
Timeout : Duration := Default.Send_Timeout)
is
Holder : Client_Holder_Access :=
To_Holder
(new Socket_Type'Class'(Socket), Environment, Kind, Groups,
Timeout);
begin
Register
(Server, Client_Id, Holder, (1 .. 0 => 0), Content_Type,
Duplicated_Age, Ext_Sock_Alloc => False);
end Register;
-------------
-- Release --
-------------
procedure Release
(Server : in out Object;
Close_Sockets : Boolean;
Left_Open : Boolean;
Get_Final_Data : access function
(Holder : not null access Client_Holder)
return Stream_Element_Array := null)
is
Queue : Tables.Map;
Holder : Client_Holder_Access;
begin
Server.Unregister_Clients (Queue, Open => Left_Open);
for Cursor in Queue.Iterate loop
Holder := Tables.Element (Cursor);
if Holder.Phase /= Available then
Waiter_Command (Server, Holder, Remove);
end if;
end loop;
if not Wait_Send_Completion (10.0) then
Internal_Error_Handler ("Could not clear server push waiter");
end if;
for Cursor in Queue.Iterate loop
Holder := Tables.Element (Cursor);
if Get_Final_Data /= null then
declare
Data : Stream_Element_Array (1 .. 8196);
Last : Stream_Element_Offset;
begin
loop
Get_Data (Holder.all, Data, Last);
exit when Last < 1;
Holder.Socket.Send (Data (1 .. Last));
end loop;
Holder.Socket.Send (Get_Final_Data (Holder));
exception
when Net.Socket_Error =>
null;
end;
end if;
if Close_Sockets then
Holder.Socket.Shutdown;
end if;
Free (Holder);
end loop;
end Release;
-------------
-- Restart --
-------------
procedure Restart (Server : in out Object) is
begin
Server.Restart;
end Restart;
----------
-- Send --
----------
procedure Send
(Server : in out Object;
Data : Client_Output_Type;
Group_Id : String := "";
Content_Type : String := "";
Thin_Id : String := "";
Client_Gone : access procedure (Client_Id : String) := null)
is
use type Ada.Containers.Count_Type;
Holder : Client_Holder_Access;
Queue : Tables.Map;
WQ : Waiter_Queues.List;
begin
Server.Send (Data, Group_Id, Content_Type, Thin_Id, Queue);
for Cursor in Queue.Iterate loop
Holder := Tables.Element (Cursor);
if Holder.Errmsg = Null_Unbounded_String then
WQ.Append ((Server'Unrestricted_Access, Holder, Add));
else
declare
Client_Id : constant String := Tables.Key (Cursor);
begin
if Client_Gone /= null then
Client_Gone (Client_Id);
end if;
Holder.Socket.Shutdown;
if Holder.Phase /= Available then
raise Program_Error with
Holder.Phase'Img & ' ' & To_String (Holder.Errmsg);
end if;
Free (Holder);
end;
end if;
end loop;
if not WQ.Is_Empty then
Waiter_Queue.Add (WQ);
Waiter_Signal;
end if;
end Send;
------------
-- Send_G --
------------
procedure Send_G
(Server : in out Object;
Data : Client_Output_Type;
Group_Id : String := "";
Content_Type : String := "";
Thin_Id : String := "")
is
procedure Gone (Client_Id : String);
----------
-- Gone --
----------
procedure Gone (Client_Id : String) is
begin
Client_Gone (Client_Id);
end Gone;
begin
Send (Server, Data, Group_Id, Content_Type, Thin_Id, Gone'Access);
end Send_G;
-------------
-- Send_To --
-------------
procedure Send_To
(Server : in out Object;
Client_Id : Client_Key;
Data : Client_Output_Type;
Content_Type : String := "";
Thin_Id : String := "")
is
Holder : Client_Holder_Access;
begin
Server.Send_To (Client_Id, Data, Content_Type, Thin_Id, Holder);
if Holder /= null then
if Holder.Errmsg /= Null_Unbounded_String then
declare
Errmsg : constant String := To_String (Holder.Errmsg);
begin
Holder.Socket.Shutdown;
if Holder.Phase /= Available then
raise Program_Error with Holder.Phase'Img & ' ' & Errmsg;
end if;
Free (Holder);
raise Client_Gone with Errmsg;
end;
end if;
Waiter_Command (Server, Holder, Add);
end if;
end Send_To;
--------------------------------
-- Set_Internal_Error_Handler --
--------------------------------
procedure Set_Internal_Error_Handler (Handler : Error_Handler) is
begin
Internal_Error_Handler := Handler;
end Set_Internal_Error_Handler;
--------------
-- Shutdown --
--------------
procedure Shutdown
(Server : in out Object; Close_Sockets : Boolean := True) is
begin
Release (Server, Close_Sockets, Left_Open => False);
end Shutdown;
procedure Shutdown
(Server : in out Object;
Final_Data : Client_Output_Type;
Final_Content_Type : String := "")
is
function Get_Final_Data
(Holder : not null access Client_Holder) return Stream_Element_Array;
--------------------
-- Get_Final_Data --
--------------------
function Get_Final_Data
(Holder : not null access Client_Holder) return Stream_Element_Array is
begin
return Data_Chunk (Holder, Final_Data, Final_Content_Type);
end Get_Final_Data;
begin
Release
(Server,
Close_Sockets => True,
Left_Open => False,
Get_Final_Data => Get_Final_Data'Access);
end Shutdown;
-----------------------
-- Shutdown_If_Empty --
-----------------------
procedure Shutdown_If_Empty (Server : in out Object; Open : out Boolean) is
begin
Server.Shutdown_If_Empty (Open);
end Shutdown_If_Empty;
---------------
-- Subscribe --
---------------
procedure Subscribe
(Server : in out Object; Client_Id : Client_Key; Group_Id : String) is
begin
Server.Subscribe (Client_Id, Group_Id);
end Subscribe;
--------------------
-- Subscribe_Copy --
--------------------
procedure Subscribe_Copy
(Server : in out Object; Source : String; Target : String) is
begin
Server.Subscribe_Copy (Source => Source, Target => Target);
end Subscribe_Copy;
---------------
-- To_Holder --
---------------
function To_Holder
(Socket : Net.Socket_Access;
Environment : Client_Environment;
Kind : Mode;
Groups : Group_Set;
Timeout : Duration) return Client_Holder_Access
is
Holder_Groups : Group_Sets.Set;
begin
for J in Groups'Range loop
Holder_Groups.Insert (To_String (Groups (J)));
end loop;
return new Client_Holder'
(Kind => Kind,
Environment => Environment,
Created => Real_Time.Clock,
Socket => Socket,
Groups => Holder_Groups,
Chunks => <>,
Chunk_Sent => 0,
Thin => <>,
Phase => Available,
Timeout => Real_Time.To_Time_Span (Timeout),
Errmsg => <>);
end To_Holder;
----------------
-- Unregister --
----------------
procedure Unregister
(Server : in out Object;
Client_Id : Client_Key;
Close_Socket : Boolean := True)
is
Holder : Client_Holder_Access;
begin
Server.Unregister (Client_Id, Holder);
if Holder = null then
return;
end if;
if Holder.Phase = Available then
if Close_Socket then
Holder.Socket.Shutdown;
end if;
Free (Holder);
elsif Close_Socket then
Waiter_Command (Server, Holder, Shutdown);
else
Waiter_Command (Server, Holder, Deallocate);
end if;
end Unregister;
------------------------
-- Unregister_Clients --
------------------------
procedure Unregister_Clients
(Server : in out Object; Close_Sockets : Boolean := True) is
begin
Release (Server, Close_Sockets, Left_Open => True);
end Unregister_Clients;
-----------------
-- Unsubscribe --
-----------------
procedure Unsubscribe
(Server : in out Object; Client_Id : Client_Key; Group_Id : String) is
begin
Server.Unsubscribe (Client_Id, Group_Id);
end Unsubscribe;
----------------------
-- Unsubscribe_Copy --
----------------------
procedure Unsubscribe_Copy
(Server : in out Object; Source : String; Target : String) is
begin
Server.Unsubscribe_Copy (Source => Source, Target => Target);
end Unsubscribe_Copy;
--------------------------
-- Wait_Send_Completion --
--------------------------
function Wait_Send_Completion (Timeout : Duration) return Boolean is
begin
select
Waiter_Information.Empty;
return True;
or
delay Timeout;
return False;
end select;
end Wait_Send_Completion;
------------
-- Waiter --
------------
task body Waiter is
type Client_In_Wait is record
SP : Object_Access;
CH : Client_Holder_Access;
Exp : Real_Time.Time;
end record;
package Write_Sets is new AWS.Net.Generic_Sets (Client_In_Wait);
Write_Set : Write_Sets.Socket_Set_Type;
use Real_Time;
use Write_Sets;
R_Signal : aliased Net.Socket_Type'Class := Socket (Security => False);
Bytes : Stream_Element_Array (1 .. 32);
B_Last : Stream_Element_Offset;
Queue : Waiter_Queues.List;
Queue_Item : Waiter_Queue_Element;
Counter : Wait_Counter_Type := 0;
procedure Add_Item
(Server : Object_Access; Holder : Client_Holder_Access);
procedure Remove_Processing;
procedure Wait_On_Sockets;
--------------
-- Add_Item --
--------------
procedure Add_Item
(Server : Object_Access; Holder : Client_Holder_Access) is
begin
if Holder.Phase /= Going then
raise Program_Error with Phase_Type'Image (Holder.Phase);
end if;
Holder.Phase := Waiting;
Add
(Set => Write_Set,
Socket => Holder.Socket,
Data => (Server, Holder, Clock + Holder.Timeout),
Mode => Write_Sets.Both);
Counter := Counter + 1;
end Add_Item;
-----------------------
-- Remove_Processing --
-----------------------
procedure Remove_Processing is
begin
case Queue_Item.Action is
when Add => raise Program_Error;
when Remove => null;
when Deallocate => Free (Queue_Item.Holder);
when Shutdown =>
Queue_Item.Holder.Socket.Shutdown;
Free (Queue_Item.Holder);
end case;
end Remove_Processing;
---------------------
-- Wait_On_Sockets --
---------------------
procedure Wait_On_Sockets is
begin
Wait (Write_Set, Timeout => Duration'Last);
exception
when E : Socket_Error =>
-- !!! Most possible it is ENOBUFS or ENOMEM error
-- because of too many open sockets. We should see the exact
-- error in the socket error log file.
-- We should close sockets in waiter because server has a
-- lack of socket resources and clients in other peer of
-- those socket is slow receiving the socket data.
declare
Message : constant String :=
"Clear waiter because of: " & Exception_Message (E);
procedure Process
(Socket : in out Socket_Type'Class;
Client : in out Client_In_Wait);
-------------
-- Process --
-------------
procedure Process
(Socket : in out Socket_Type'Class;
Client : in out Client_In_Wait) is
begin
Client.SP.Waiter_Error (Client.CH, Message);
Net.Log.Error (Socket, Message);
end Process;
begin
for J in reverse 2 .. Count (Write_Set) loop
Update_Socket (Write_Set, J, Process'Access);
Remove_Socket (Write_Set, J);
end loop;
end;
end Wait_On_Sockets;
begin -- Waiter
Net.Socket_Pair (R_Signal, W_Signal);
Add (Write_Set, R_Signal'Unchecked_Access, Mode => Write_Sets.Input);
Waiter_Pause;
loop
Wait_On_Sockets;
if Is_Read_Ready (Write_Set, 1) then
Net.Receive (R_Signal, Bytes, B_Last);
Waiter_Queue.Get (Queue);
end if;
while not Queue.Is_Empty loop
Queue_Item := Queue.First_Element;
Queue.Delete_First;
if Queue_Item.Action = Add then
if Queue_Item.Holder = null
and then Queue_Item.Server = null
then
select
accept Resume;
or
terminate;
end select;
else
Add_Item (Queue_Item.Server, Queue_Item.Holder);
end if;
else -- Remove | Shutdown | Deallocate
case Queue_Item.Holder.Phase is
when Available =>
-- Socket already gone, remove processing only
Remove_Processing;
when Going =>
-- Socket on the way to waiter, move back to waiter queue
Waiter_Queue.Add (Queue_Item);
when Waiting =>
for J in reverse 2 .. Count (Write_Set) loop
if Get_Socket (Write_Set, J).Get_FD
= Queue_Item.Holder.Socket.Get_FD
then
declare
Socket : Net.Socket_Access;
procedure Process
(Socket : in out Socket_Type'Class;
Client : in out Client_In_Wait);
-------------
-- Process --
-------------
procedure Process
(Socket : in out Socket_Type'Class;
Client : in out Client_In_Wait)
is
pragma Unreferenced (Socket);
begin
if Client.SP /= Queue_Item.Server
or else Client.CH /= Queue_Item.Holder
then
raise Program_Error with
"Broken data in waiter";
end if;
-- We could write to phase directly because
-- Holder have to be out of protected object.
Queue_Item.Holder.Phase := Available;
end Process;
begin
Update_Socket (Write_Set, J, Process'Access);
Remove_Socket (Write_Set, J, Socket);
if Socket /= Queue_Item.Holder.Socket then
raise Program_Error with
"Broken socket in waiter";
end if;
Remove_Processing;
Queue_Item.Holder := null; -- To check integrity
exit;
end;
elsif
Get_Data (Write_Set, J).CH = Queue_Item.Holder
then
raise Program_Error with "Broken holder";
end if;
end loop;
if Queue_Item.Holder /= null then
Internal_Error_Handler
("Error: removing server push socket not found");
end if;
end case;
end if; -- end Remove | Shutdown | Deallocate
end loop;
for J in reverse 2 .. Count (Write_Set) loop
declare
Remove : Boolean := False;
Error : Unbounded_String;
Err_SP : Object_Access;
Err_CH : Client_Holder_Access;
procedure Process
(Socket : in out Socket_Type'Class;
Client : in out Client_In_Wait);
-------------
-- Process --
-------------
procedure Process
(Socket : in out Socket_Type'Class;
Client : in out Client_In_Wait)
is
Data : Stream_Element_Array (1 .. 8192);
Last : Stream_Element_Offset;
procedure Socket_Error (Message : String);
procedure Socket_Error_Log (Message : String);
------------------
-- Socket_Error --
------------------
procedure Socket_Error (Message : String) is
begin
Error := To_Unbounded_String (Message);
Err_SP := Client.SP;
Err_CH := Client.CH;
Remove := True;
end Socket_Error;
----------------------
-- Socket_Error_Log --
----------------------
procedure Socket_Error_Log (Message : String) is
begin
Net.Log.Error (Socket, Message);
Socket_Error (Message);
end Socket_Error_Log;
begin
if Client.CH.Phase /= Waiting then
raise Program_Error with Client.CH.Phase'Img;
end if;
if Is_Error (Write_Set, J) then
Socket_Error_Log
("Waiter socket error " & Utils.Image (Socket.Errno));
elsif Is_Read_Ready (Write_Set, J) then
begin
Socket.Receive (Data, Last);
Socket_Error_Log
("Unexpected input SP data: "
& Translator.To_String (Data (1 .. Last)));
exception
when E : Net.Socket_Error =>
Socket_Error (Exception_Message (E));
end;
elsif Is_Write_Ready (Write_Set, J) then
Client.SP.Get_Data (Client.CH, Data, Last);
if Last >= Data'First then
begin
Socket.Send (Data (1 .. Last));
Client.Exp := Clock + Client.CH.Timeout;
exception
when E : Net.Socket_Error =>
Socket_Error (Exception_Message (E));
end;
else
Remove := True;
end if;
elsif Client.Exp < Clock then
Socket_Error_Log
("Wait for write availability timeout "
& Utils.Significant_Image
(Real_Time.To_Duration (Client.CH.Timeout), 3));
end if;
end Process;
begin
Update_Socket (Write_Set, J, Process'Access);
if Remove then
if Err_SP /= null then
Err_SP.Waiter_Error (Err_CH, To_String (Error));
end if;
Remove_Socket (Write_Set, J);
end if;
end;
end loop;
-- Set size after receiving loop because most important to know about
-- empty waiter than maximum size.
Waiter_Information.Set_Size (Integer (Count (Write_Set)), Counter);
end loop;
exception
when E : others =>
Internal_Error_Handler
("Server push broken, " & Exception_Information (E));
end Waiter;
--------------------
-- Waiter_Command --
--------------------
procedure Waiter_Command
(Server : in out Object;
Holder : Client_Holder_Access;
Action : Action_Type) is
begin
-- Waiter_Queue_Element' is necessary to workaround GNAT-2010 bug
Waiter_Queue.Add
(Waiter_Queue_Element'(Server'Unrestricted_Access, Holder, Action));
Waiter_Signal;
end Waiter_Command;
------------------
-- Waiter_Queue --
------------------
protected body Waiter_Queue is
---------
-- Add --
---------
procedure Add (Item : Waiter_Queue_Element) is
begin
Queue.Append (Item);
end Add;
procedure Add (Queue : Waiter_Queues.List) is
begin
for Item of Add.Queue loop
Waiter_Queue.Queue.Append (Item);
end loop;
end Add;
---------
-- Get --
---------
procedure Get (Queue : out Waiter_Queues.List) is
begin
Get.Queue := Waiter_Queue.Queue;
Waiter_Queue.Queue.Clear;
end Get;
end Waiter_Queue;
------------------------
-- Waiter_Information --
------------------------
protected body Waiter_Information is
----------
-- Info --
----------
procedure Info
(Size : out Natural;
Max_Size : out Natural;
Max_Size_DT : out Ada.Calendar.Time;
Counter : out Wait_Counter_Type) is
begin
Info.Size := Waiter_Information.Size - 1;
Info.Max_Size := Waiter_Information.Max_Size - 1;
Info.Max_Size_DT := Waiter_Information.Max_Size_DT;
Info.Counter := Waiter_Information.Counter;
end Info;
-----------
-- Empty --
-----------
entry Empty when Size <= 1 is
begin
null;
end Empty;
--------------
-- Set_Size --
--------------
procedure Set_Size (Size : Positive; Counter : Wait_Counter_Type) is
begin
Waiter_Information.Counter := Set_Size.Counter;
Waiter_Information.Size := Set_Size.Size;
if Size > Max_Size then
Max_Size := Size;
Max_Size_DT := Ada.Calendar.Clock;
end if;
end Set_Size;
end Waiter_Information;
------------------
-- Waiter_Pause --
------------------
procedure Waiter_Pause is
begin
Push.No_Servers.all;
-- Waiter_Queue_Element' is necessary to workaround GNAT-2010 bug
Waiter_Queue.Add (Waiter_Queue_Element'(null, null, Add));
Waiter_Signal;
end Waiter_Pause;
-------------------
-- Waiter_Resume --
-------------------
procedure Waiter_Resume is
begin
Push.First_Server.all;
select
Waiter.Resume;
or delay 10.0;
raise Program_Error with "Could not resume server push waiter";
end select;
end Waiter_Resume;
-------------------
-- Waiter_Signal --
-------------------
procedure Waiter_Signal is
begin
W_Signal.Send (Byte0);
end Waiter_Signal;
begin
Push.No_Servers := Server.No_Servers;
Push.First_Server := Server.First_Server;
Server.No_Servers := Waiter_Pause'Access;
Server.First_Server := Waiter_Resume'Access;
end AWS.Server.Push;
|