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Changes for page 01 Lua Functions

Last modified by Theodore Xu on 2023/10/26 10:51
From version 18.1
edited by Theodore Xu
on 2023/08/25 09:48
Change comment: There is no comment for this version
To version 10.1
edited by Hunter
on 2023/01/15 16:45
Change comment: There is no comment for this version

Summary

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.AiXia
1 +XWiki.Hunter
Content
... ... @@ -1508,12 +1508,9 @@
1508 1508  * Obtaining ICCID (read only)
1509 1509  ** addr_getstring("@W_HSW225",15)
1510 1510  * (((
1511 -TSAP settings of Siemens LOGO PLC*
1512 -
1513 -(((
1511 +TSAP settings of Siemens LOGO PLC* (((
1514 1514  addr_setword("@W_0#HSW1200",8192) means set the Local TSAP as 20.00
1515 1515  )))
1516 -
1517 1517  * (((
1518 1518  addr_setword("@W_0#HSW1201",4096) means set the Remote TSAP as 10.00
1519 1519  )))
... ... @@ -1872,8 +1872,184 @@
1872 1872  
1873 1873  Failed: nil
1874 1874  
1875 -= (% style="font-size:14px" %) (%%) =
1872 += **11 MySQL database operation** =
1876 1876  
1874 +== **luaMySql.init(string sourcename, string username, string password, string host, number port, string character)** ==
1875 +
1876 +**Function:** Configure database connection parameters
1877 +
1878 +**Parameter:**
1879 +
1880 +sourcename: the name of database
1881 +
1882 +username: the username of the connection
1883 +
1884 +password: the password of the connection
1885 +
1886 +host: the host name of the connection
1887 +
1888 +port: the host port of the connection
1889 +
1890 +character: the character set of the connection
1891 +
1892 +**Return:**
1893 +
1894 +Succeed: string
1895 +
1896 +Failed: multi
1897 +
1898 +== **luaMySql.exec(string statement)** ==
1899 +
1900 +**Function:** Execute the given SQL statement without returning the result set (add, delete, change)
1901 +
1902 +**Parameter:**
1903 +
1904 +statement: the given SQL statement
1905 +
1906 +**Return:**
1907 +
1908 +Succeed: status: returns the number of rows affected by SQL statement execution.
1909 +
1910 +Failed: nil, errorString
1911 +
1912 +== **luaMySql.execWithResult(string statement)** ==
1913 +
1914 +**Function:** Execute the given SQL statement returning the result set (check)
1915 +
1916 +**Parameter:**
1917 +
1918 +statement: the given SQL statement
1919 +
1920 +**Return:**
1921 +
1922 +Succeed: table: returns the result set
1923 +
1924 +Failed: nil, errorString
1925 +
1926 +**For example:**
1927 +
1928 +{{code language="LUA"}}
1929 +mysql = require"mysqlclient"
1930 +
1931 +function DataInitRight()
1932 +
1933 +local dbName = "db_lua1"
1934 +
1935 +local user = "root"
1936 +
1937 +local pwd = "123456"
1938 +
1939 +local host = "192.168.56.186"
1940 +
1941 +local port = 3306
1942 +local character = "UTF8"
1943 +
1944 +mysql.init(dbName, user, pwd, host, port, character)
1945 +
1946 +end
1947 +
1948 +function ExecFunc()
1949 +
1950 +status, errorString = mysql.exec("delete from tb_lua1 where mykey =
1951 +
1952 +10;")
1953 +
1954 +if nil == status then
1955 +
1956 +print("ExecFunc() error:", errorString)
1957 +
1958 +return -1
1959 +
1960 +else
1961 +
1962 +print("the number of rows affected by the command:", status)
1963 +
1964 +end
1965 +
1966 +return 0
1967 +
1968 +end
1969 +
1970 +function ExecWithResultFunc()
1971 +
1972 +status, errorString = mysql.execWithResult("select * from tb_lua1;")
1973 +
1974 +if nil == status then
1975 +
1976 +print("ExecWithResultFunc() error:", errorString)
1977 +
1978 +return -1
1979 +
1980 +else
1981 +
1982 +print("ExecWithResultFunc()
1983 +
1984 +success
1985 +
1986 +: status
1987 +
1988 +type
1989 +
1990 +=
1991 +
1992 +",
1993 +
1994 +type(status))
1995 +
1996 +print("ExecWithResultFunc() success : status len = ", #status)
1997 +
1998 +local num = #status
1999 +
2000 +local i = 1
2001 +
2002 +if num > 0 then
2003 +
2004 +for i = 1, num, 1 do
2005 +
2006 +local var = string.format("select result[%d] :mykey = %d,
2007 +
2008 +value = %s", i, status[i].mykey, status[i].value)
2009 +
2010 +print(var)
2011 +
2012 +end
2013 +
2014 +end
2015 +
2016 +print("---------------")
2017 +
2018 +end
2019 +
2020 +return 0
2021 +end
2022 +
2023 +function luaMysql_apiTest.main()
2024 +
2025 +print("script running ...")
2026 +
2027 +DataInitRight()
2028 +
2029 +--use exec demo
2030 +
2031 +if ExecFunc() < 0 then
2032 +
2033 +return
2034 +
2035 +end
2036 +
2037 +--use execWithResult demo
2038 +
2039 +if ExecWithResultFunc() < 0 then
2040 +
2041 +return
2042 +
2043 +end
2044 +
2045 +print("script running success")
2046 +
2047 +end
2048 +{{/code}}
2049 +
1877 1877  = **12 Message summary algorithm** =
1878 1878  
1879 1879  == **hmac(string hash_func, string key, string message)** ==