Type Function Library json.* Return value Table Revision 2019.3459 Keywords json See also json.decode()
Decodes the contents of a file that is expected to contain
nil, the position of the next character that doesn't belong to the object, and an error message. Errors can either relate to issues opening the file or to JSON syntax issues.
filename parameter should usually be obtained from
system.pathForFile() so it can be correctly located in the application's sandbox. See the Example below.
json.decodeFile( filename [, position [, nullval]] )
String. String containing the name of a file containing JSON data.
Number. Index within file to start decoding (default is
1 if omitted).
Value to be returned for items with a value of
nil don't normally exist).
local json = require( "json" ) local filename = system.pathForFile( "datafile.json", system.ResourceDirectory ) local decoded, pos, msg = json.decodeFile( filename ) if not decoded then print( "Decode failed at "..tostring(pos)..": "..tostring(msg) ) else print( "File successfully decoded!" ) end