I am using Delphi XE7 and I am having trouble converting objects into JSON. I can get some object to give back what I think is proper JSON, eg TTestObject:
{"Test":{"Field":"TestField","Operation":"TestOperation","values":
["Value1","Value2","Value3","Value4"]}}
JOBJ:= TJSONObject.Create;
JOBJ.AddPair('Test', ATestObject.JSONObj);
memo1.Lines.Add(JObj.ToJSON);
JOBJ.Free;
However, when I try to get JSON back from my objects that have properties that are objects as well, I get JSON with \ characters.
{"Exceptions":{"TestObject1":"
{\"Mode\":\"0\",\"Value\":\"100.50\",\"Days\":\"10\"}","TestObject2":"
{\"Mode\":\"0\",\"Days\":\"0\",\"UnitsSold\":\"
...
What is causing this?
The JSON is perfectly valid. Your nested objects, when represented as JSON, contain double quote characters. Since they are reserved as string delimiters they need to be escaped. Hence the use of the backslash character as the escape character.
Related
I'm having the below JSON coming in as a String input to my code. Since the string isn't uniformly formatted, overcoming the escape characters and grouping of the quotes to read the string and convert it into Java Object and sub-objects has run into issues
{"payload":{"details":"{\"source\":\"incor\",\"type\":\"build\",\"created\":\"1553855543108\",\"organization\":null,\"project\":null,\"application\":null,\"_content_id\":null,\"attributes\":null,\"requestHeaders\":{}}","content":"{\"project\":{\"name\":\"spinner\",\"lastBuild\":{\"building\":false,\"number\":0}},\"master\":\"IncorHealthCheck\"}","rawContent":null,"eventId":"bb357b79-069b-426d-8d21-8d04b06f5009"},"eventName":"city_spinner_events"}
I've tried using GSON, Jackson so far to try and read the String and convert into object and sub-objects. However, I've been able to objectify only the top level object. I face issues while I need to create sub-objects due to the escape characters and misreading of grouping of quotes by the parser. It throws errors and exceptions.
The expected JSON is as below which can be converted to object :
{"payload":{"details":{"source":"incor","type":"build","created":"1553855543108","organization":null,"project":null,"application":null,"_content_id":null,"attributes":null,"requestHeaders":{}},"content":{"project":{"name":"spinner","lastBuild":{"building":false,"number":0}},"master":"IncorHealthCheck"},"rawContent":null,"eventId":"bb357b79-069b-426d-8d21-8d04b06f5009"},"eventName":"city_spinner_events"}
Try unescapeJava from org.apache.commons.text.StringEscapeUtils,
StringEscapeUtils.unescapeJava(str);
I'm using json plugin to get the response in json.
But I m getting the unwanted result:
Here is what I get:
{"data":"[[\"service\",\"webservices\",\"document\"],[\"validation\",\"adapters\",\"server\"]]","records":25,"recordsTotal":75}
originally the data var in my action class is like this:
[["service","webservices","document"],["validation","adapters","server"]]
but json plugin adds the backslash.
The wanted result is that:
{"data":[["service","webservices","document"],["validation","adapters","server"]],"records":25,"recordsTotal":75}
Is there a way to get the later result ?
Thanks
You're representing the data as a PHP string. " is obviously a reserved character in JSON, so your serialization library is dutifully escaping the quote using /.
If you set up the PHP variable so it's an array of arrays, instead of a string representing an array of arrays, then your JSON serialization will work fine.
I have json stored in data attributes.
<div data-dataarray="[["Shipper","Ship No","Weight"],["1WWWQUICK\PARTSCOM",1,1]]">
data = $('#'+moduleId).data('dataarray')
So data is now a string.
Which I then need to parse to get it back to json:
jsondata = JSON.parse(data);
This json can have special characters (notice the backslash)... which causes an error. How can I escape them before/while parsing?
firstly
I think the html5 data attributes need to have a form like data-xyzUserVariable. then you retrieve them using jquery.data("#xyz_id", "xyzUserVariable"),
secondly
However, be wary that jQuery cleverly attempts to convert the data to a suitable type (booleans, numbers, objects, arrays or null) and avoids touching the DOM.
thirdly
your json seems to be an array of objects ..is it missing an ending bracket ']' ?
I use jackson to parse json data. Now I have a problem with handling a \uXXXX issue.
The data I got here is like
{"UID":"here_\ud83d\udc3b"}
After I use ObjectMapper.readValue(jsonContent, UserId.class); to convert json to an instance of UserId, the UID property is not literally "here_\ud83d\udc3b". Jackson convert \ud83d\udc3b to 2 chars as the unicode value.
My question is, is it possible to let jackson skip this "Unicode transformation" and key the literal value "\ud83d\udc3b" as it is?
No. JSON parsers are required to handle Unicode escapes to produce underlying Unicode characters.
When writing, on the other hand, some characters may also be encoded using similar Unicode escapes.
So if you need to use escaping, you need to re-encode such values yourself.
Having created a text file with a JSON object (from an array) using json_encode, I'm now supposed to decode the same object. However, with json_decode, the unicode escape sequences don't seem to be properly converted back.
Here is the example of a string from the JSON file:
S\u00720066006f006cd industriomr\u00640065
After json_decoding, the text becomes:
Sr0066006f006cd industriomrd0065
Any idea what's going on here?
The decoding seems to work fine; the final text does indeed correspond with the encoded one. What was the object like before encoding?