Current File : /home/devcapijob/public_html/gestion/liberary/Filemanager/connectors/lasso/encode_json.inc
<?LassoScript
//
// JSON Encoding and Decoding
//
// Copyright 2007 LassoSoft, LLC
//
// This file was originally published as a Tip of the Week and then
// updated in a subsequent tip of the week.
//
// <http://www.lassosoft.com/Documentation/TotW/index.lasso?9268>
// <http://www.lassosoft.com/Documentation/TotW/index.lasso?9319>
//
// Changes - 2007-06-30 Whitespace between tokens and UTF-8 BOM
// support by Göran Törnquist. 2007-08-07 New map method of
// embedding native data types and -NoNative and -UseNative keywords
// by Fletcher Sandbeck. 2007-09-28 by Fletcher Sandbeck. Added
// [JSON_RPCCall] tag. Added new RPC.LassoApp files which
// automatically recognizes incoming JSON-RPC calls over HTTP. Added
// support for __jsonclass__ embedding method. Added [Object] and
// [Literal] which make JavaScript objects and functions easier to
// define.
//
// Installation - Either include this file in the Lasso page you
// want to use these tags or place this file in the "LassoStartup"
// folder within the Lasso Professional 8 application folder or the
// sub-folder for a specific site.
//
// Description - These tags implement simple JSON (JavaScript Object
// Notation) encoding and decoding in Lasso. JSON is a text format
// used for language independent data exchange. It is based on the
// syntax of JavaScript and JSON encoded objects can be passed into
// the JavaScript eval() function directly.
//
// JSON supports the following data types natively: Array, Map,
// String, Integer, Decimal, Boolean, Null, and Date. Every JSON
// object must be wrapped in either an array or a map. If any other
// data type is passed to [Encode_JSON] then it will be encoded as a
// single element array. Literal is a subclass of string which will
// be inserted without quotes or encoding. Object is a subclass of
// map whose keys are embedded as literals.
//
// By default, data type which are not supported natively are
// converted to the closest possible JSON data type. Sets, Lists,
// Queues, etc. are converted to Arrays.
//
// -UseNative can be used to turn off this automatic conversion. If
// -UseNative is specified then each data type is embedded using the
// serialization method described next.
//
// Other data types are embedded using the JSON-RPC standard.
// {"__jsonclass__":["constructor", [param1,...]], "prop1": ...} In
// Lasso, the constructor is always "deserialize" and there is one
// parameter which contains the native Lasso serialization of the
// type.
//
// NOTE - This replaces the Lasso-specific serialization scheme in
// an earlier version of this document. However, the earlier
// serialization scheme will still be decoded for backward
// compatibility with earlier implementations.
//
// -NoNative can be used to turn off embedding data types as a
// __jsonclass__. If -NoNative is specified then data types which
// are not supported natively (and cannot be converted) will be
// skipped.
//
// [Encode_JSON] - Encodes a Lasso data type as a string. If a map
// or array is passed then it will be encoded directly. Any other
// data type will be wrapped in a single element array and encoded.
// The output will always use UTF-8 encoding without extra escape
// sequences.
//
// [Decode_JSON] - Decodes a JSON object into native Lasso objects.
// The result will be either an array or a map. The tag expects a
// native Lasso string. If you are importing a JSON object encoded
// in UTF-16 or UTF-32 then it should be imported into a Lasso
// string before being decoded.
//
// [Literal] - This is a subclass of [String]. A literal works
// exactly like a string, but will be inserted directly rather than
// being encoded into JSON. This allows JavaScript elements like
// functions to be inserted into JSON objects. This is most useful
// when the JSON object will be used within a JavaScript on the
// local page. [Map: 'fn'=(Literal: 'function(){ ...})] => {'fn':
// function(){ ...}}
//
// [Object] - This is a subclass of [Map]. An object works exactly
// like a map, but when it is encoded into JSON all of the keys will
// be inserted literally. This makes it easy to create a JavaScript
// object without extraneous quote marks. [Object: 'name'='value']
// => {name: "value"}
//
// Note - [Object] and [Literal] should only be used when encoding
// Javascript for use in local scripts. They will not generate valid
// JSON encodings.
//
// Feedback - Please let us know if you have any problems with this
// implementation. In particular, please forward us any JSON objects
// which do not decode properly. Send mail to: <bugs@lassosoft.com>.
//
// More Information - More information about the JSON standard and
// JSON-RPC can be found at the following URLs.
//
// <http://json.org/>
// <http://json-rpc.org/>
// <http://www.ietf.org/rfc/rfc4627.txt?number=4627>
//
Define_Tag: 'JSON', -Namespace='Encode_', -Required='value', -Optional='options', -priority='replace';
Local: 'output' = '';
Local: 'newoptions' = (Array: -Internal);
If: !(Local_Defined: 'options') || (#options->(IsA: 'array') == False);
Local: 'options' = (Array);
/If;
If: (#options >> -UseNative) || (Params >> -UseNative);
#newoptions->(Insert: -UseNative);
/If;
If: (#options >> -NoNative) || (Params >> -NoNative);
#newoptions->(Insert: -NoNative);
/If;
If: (#options !>> -Internal) && (#options !>> -UseNative) && (#value->(IsA: 'set')) || (#value->(IsA: 'list')) || (#value->(IsA: 'queue')) || (#value->(IsA: 'priorityqueue')) || (#value->(IsA: 'stack'));
#output += (Encode_JSON: Array->(insertfrom: #value->iterator) &, -Options=#newoptions);
Else: (#options !>> -Internal) && (#value->(Isa: 'array') == False) && (#value->(IsA: 'map') == False);
#output += '[' + (Encode_JSON: #value, -Options=#newoptions) + ']';
Else: (#value->(IsA: 'literal'));
#output += #value;
Else: (#value->(IsA: 'string'));
#output += '"' + ((String: #value)->(Replace: '\"', '\\"') & (Replace: '\r', '\\r') & (Replace: '\n', '\\n') & (Replace: '\t', '\\t') & (Replace: '\f', '\\f') & (Replace: '\b', '\\b') &) + '"';
Else: (#value->(IsA: 'integer')) || (#value->(IsA: 'decimal')) || (#value->(IsA: 'boolean'));
#output += (String: #value);
Else: (#value->(IsA: 'null'));
#output += 'null';
Else: (#value->(IsA: 'date'));
if: #value->gmt;
#output += '"' + #value->(format: '%QT%TZ') + '"';
else;
#output += '"' + #value->(format: '%QT%T') + '"';
/if;
Else: (#value->(IsA: 'array'));
#output += '[';
Iterate: #value, (Local: 'temp');
#output += (Encode_JSON: #temp, -Options=#newoptions);
If: #value->Size != Loop_Count;
#output += ', ';
/If;
/Iterate;
#output += ']';
Else: (#value->(IsA: 'object'));
#output += '{';
Iterate: #value, (Local: 'temp');
#output += #temp->First + ': ' + (Encode_JSON: #temp->Second, -Options=#newoptions);
If: (#value->Size != Loop_Count);
#output += ', ';
/If;
/Iterate;
#output += '}';
Else: (#value->(IsA: 'map'));
#output += '{';
Iterate: #value, (Local: 'temp');
#output += (Encode_JSON: #temp->First, -Options=#newoptions) + ': ' + (Encode_JSON: #temp->Second, -Options=#newoptions);
If: (#value->Size != Loop_Count);
#output += ', ';
/If;
/Iterate;
#output += '}';
Else: (#value->(IsA: 'client_ip')) || (#value->(IsA: 'client_address'));
#output += (Encode_JSON: (String: #value), -Options=#newoptions);
Else: (#options !>> -UseNative) && (#value->(IsA: 'set')) || (#value->(IsA: 'list')) || (#value->(IsA: 'queue')) || (#value->(IsA: 'priorityqueue')) || (#value->(IsA: 'stack'));
#output += (Encode_JSON: Array->(insertfrom: #value->iterator) &, -Options=#newoptions);
Else: (#options !>> -NoNative);
#output += (Encode_JSON: (Map: '__jsonclass__'=(Array:'deserialize',(Array:'<LassoNativeType>' + #value->Serialize + '</LassoNativeType>'))));
/If;
Return: @#output;
/Define_Tag;
Define_Tag: 'JSON', -Namespace='Decode_', -Required='value', -priority='replace';
(#value == '') ? Return: Null;
Define_Tag: 'consume_string', -Required='ibytes';
Local: 'obytes' = bytes;
local: 'temp' = 0;
While: ((#temp := #ibytes->(export8bits: #temp)) != 34);
#obytes->(import8bits: #temp);
(#temp == 92) ? #obytes->(import8bits: #ibytes->export8bits); // Escape \
/While;
Local: 'output' = ((String: #obytes)->(Replace: '\\"', '\"') & (Replace: '\\r', '\r') & (Replace: '\\n', '\n') & (Replace: '\\t', '\t') & (Replace: '\\f', '\f') & (Replace: '\\b', '\b') &);
If: #output->(BeginsWith: '<LassoNativeType>') && #output->(EndsWith: '</LassoNativeType>');
Local: 'temp' = #output - '<LassoNativeType>' - '</LassoNativeType>';
Local: 'output' = null;
Protect;
#output->(Deserialize: #temp);
/Protect;
Else: (Valid_Date: #output, -Format='%QT%TZ');
Local: 'output' = (Date: #output, -Format='%QT%TZ');
Else: (Valid_Date: #output, -Format='%QT%T');
Local: 'output' = (Date: #output, -Format='%QT%T');
/If;
Return: @#output;
/Define_Tag;
Define_Tag: 'consume_token', -Required='ibytes', -required='temp';
Local: 'obytes' = bytes->(import8bits: #temp) &;
local: 'delimit' = (array: 9, 10, 13, 32, 44, 58, 93, 125); // \t\r\n ,:]}
While: (#delimit !>> (#temp := #ibytes->export8bits));
#obytes->(import8bits: #temp);
/While;
Local: 'output' = (String: #obytes);
If: (#output == 'true') || (#output == 'false');
Return: (Boolean: #output);
Else: (#output == 'null');
Return: Null;
Else: (String_IsNumeric: #output);
Return: (#output >> '.') ? (Decimal: #output) | (Integer: #output);
/If;
Return: @#output;
/Define_Tag;
Define_Tag: 'consume_array', -Required='ibytes';
Local: 'output' = array;
local: 'delimit' = (array: 9, 10, 13, 32, 44); // \t\r\n ,
local: 'temp' = 0;
While: ((#temp := #ibytes->export8bits) != 93); // ]
If: (#delimit >> #temp);
// Discard whitespace
Else: (#temp == 34); // "
#output->(insert: (consume_string: @#ibytes));
Else: (#temp == 91); // [
#output->(insert: (consume_array: @#ibytes));
Else: (#temp == 123); // {
#output->(insert: (consume_object: @#ibytes));
Else;
#output->(insert: (consume_token: @#ibytes, @#temp));
(#temp == 93) ? Loop_Abort;
/If;
/While;
Return: @#output;
/Define_Tag;
Define_Tag: 'consume_object', -Required='ibytes';
Local: 'output' = map;
local: 'delimit' = (array: 9, 10, 13, 32, 44); // \t\r\n ,
local: 'temp' = 0;
local: 'key' = null;
local: 'val' = null;
While: ((#temp := #ibytes->export8bits) != 125); // }
If: (#delimit >> #temp);
// Discard whitespace
Else: (#key !== null) && (#temp == 34); // "
#output->(insert: #key = (consume_string: @#ibytes));
#key = null;
Else: (#key !== null) && (#temp == 91); // [
#output->(insert: #key = (consume_array: @#ibytes));
#key = null;
Else: (#key !== null) && (#temp == 123); // {
#output->(insert: #key = (consume_object: @#ibytes));
#key = null;
Else: (#key !== null);
#output->(insert: #key = (consume_token: @#ibytes, @#temp));
(#temp == 125) ? Loop_abort;
#key = null;
Else;
#key = (consume_string: @#ibytes);
while(#delimit >> (#temp := #ibytes->export8bits));
/while;
#temp != 58 ? Loop_Abort;
/If;
/While;
If: (#output >> '__jsonclass__') && (#output->(Find: '__jsonclass__')->(isa: 'array')) && (#output->(Find: '__jsonclass__')->size >= 2) && (#output->(Find: '__jsonclass__')->First == 'deserialize');
Return: #output->(find: '__jsonclass__')->Second->First;
Else: (#output >> 'native') && (#output >> 'comment') && (#output->(find: 'comment') == 'http://www.lassosoft.com/json');
Return: #output->(find: 'native');
/If;
Return: @#output;
/Define_Tag;
Local: 'ibytes' = (bytes: #value);
Local: 'start' = 1;
#ibytes->removeLeading(BOM_UTF8);
Local: 'temp' = #ibytes->export8bits;
If: (#temp == 91); // [
Local: 'output' = (consume_array: @#ibytes);
Return: @#output;
Else: (#temp == 123); // {
Local: 'output' = (consume_object: @#ibytes);
Return: @#output;
/If;
/Define_Tag;
Define_Type: 'Literal', 'String';
/Define_Type;
Define_Type: 'Object', 'Map';
/Define_Type;
Define_Tag: 'RPCCall', -Namespace='JSON_',
-Required='method',
-Optional='params',
-Optional='id',
-Optional='host', -priority='replace';
!(Local_Defined: 'host') ? Local: 'host' = 'http://localhost/lassoapps.8/rpc/rpc.lasso';
!(Local_Defined: 'id') ? Local: 'id' = Lasso_UniqueID;
Local: 'request' = (Map: 'method' = #method, 'params' = #params, 'id' = #id);
Local: 'request' = (Encode_JSON: #request);
Local: 'result' = (Include_URL: #host, -PostParams=#request);
Local: 'result' = (Decode_JSON: #result);
Return: @#result;
/Define_Tag;
?>
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