I found that in the case of parsing JSON string and creating dictionaries and collections, it did not make too much sense to use the cStringBuilder class. As of the time of this writing, you'll see a link to several different JSON parsers there, but only one is for VB6/VBA (the others are .NET): VB-JSON. That’s all for this article. It works. The issue seems to be in the parsing algorithm used: some structures of valid JSON raise errors using the above code (see some examples here – and maybe watch the issue to see if there’s a fix at some point?). But now, How do i take those objects and serialize them to a JSON string? slegy asked on 2013-12-30. As I recall, phoneNumber is an array, and the code doesn't reference other items on different levels. Does it make any scientific sense that a comet coming to crush Earth would appear "sideways" from a telescope and on the sky (from Earth)? '{ "name":"John", "age":"function () {return To learn more, see our tips on writing great answers. "Garbled" based on that article wrote " JBS data parsing of VBS scripts ", slightly improved my method; but he recently found that this component is not very compatible, and wrote a " VBS script JSON data parsing ( 2) 》, which uses regular expressions to parse JSON; later wrote a " VBS script JSON data parsing (3) [final chapter] ", which uses htmlfile instead of MSScriptControl.ScriptControl to enhance portability Sex: window.execScript "var json = " & strJson, "JScript". @CodenameK You should provide me the real link of your json file to try to parse it correctly, in my example just works for the link in the script ! is there a library for that. and you would have to use eval() to convert them back into functions. Essentially I'm using the parser to deserialize the json i get from a web service. The JSON returned from the server is an array: If you need to include a date, write it as a string. You can convert it back into a function later: You should avoid using functions in JSON, the functions will lose their scope, VbsJson.vbs: Class VbsJson 'Author: Demon 'Date: 2012/5/3 But, we can circumvent using strings and string comparisons. Experts Exchange is the only place where you can interact directly with leading experts in the technology field. The VB-JSON parser does its job, but with these kinds of messages becomes rather slow. How to download and get values from JSON file using VBScript or batch file? Time for a thorough inspection of the code and to implement potential improvements. For my use case, these strings are small, especially the attribute names, the values can be larger, but never at the size that the cStringBuilder class would make a big difference. Learn more, We use analytics cookies to understand how you use our websites so we can make them better, e.g. 23,759 Views. We use optional third-party analytics cookies to understand how you use GitHub.com so we can build better products. This already improved the performance. As the "final chapter" seems to be a little worse, this article is the existence of the final chapter: using Native VBScript to parse JSON - VbsJson class. This class provides two public methods: Encode and Decode, which are used to generate and parse JSON data, respectively. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. The VB-JSON parser does its job, but with these kinds of messages becomes rather slow. I have just used jquery for this and posted to an asp page. When receiving data from a web server, the data is always a string. window.execScript "var json = " & strJson, "JScript" Set ParseJson = window.json: End Function : I have to say that this method is very clever, but it can't traverse arrays and objects. https://github.com/douglascrockford/JSON-js. "date": "Tue, 23 Aug 2011 14:12:01 0200", "token": "7a559a39-51a5-4f21-92aa-cc880da2233f". Parse the data with JSON.parse(), and the data becomes a JavaScript object. I once wrote a " Resolving JSON Format Data with VBS ", which mentions three ways to parse JSON with VBS: First, write a library that parses JSON according to the algorithm; second, use regular expressions to match the required Data; third, parsing with JavaScript. What are "non-Keplerian" orbits? The second BSN developer competition of blockchain service network has come to an end and ten teams have come to the fore! (Get your first solution completely free - no credit card required). before returning the value. Code 800A01B6". I have been involved for the last ten years in designing space missions, satellites and software to support the design of these systems for organizations such as the European Space Agency (ESA), the German Aerospace Agency (DLR) as well as commercial companies such as Airbus DS and Thales. Is there a name for paths that follow gridlines? This class is good for concatenating large strings together. When I tried to download the zip file, Windows said the data was corrupt. You signed in with another tab or window. Here is a sample of the json file: If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: '{ "name":"John", "age":30, "city":"New York"}'. Use the XMLHttpRequest to get data from the server: When using the JSON.parse() on a JSON derived from an array, the method will Private Whitespace, NumberRegex, StringChunk, NumberRegex.Pattern = "(-?(?:0|[1-9]\d*))(\.\d+)?([eE][-+]?\d+)? I take no credit for the VB-JSON Parser Library, that excellent code can be found here and is published under a BSD License, which in turn is based on this project also published under the BSD License. If ASP uses JScript to write server-side code to manipulate JSON strings, it’s easy. Parse JSON string in JavaScript In JavaScript, the JSON object is used to parse a JSON string. "Url": "http://www.example.com/image/481989943". The entry method of the Parser is the following: The parse function takes a (JSON) string as input and it is important to note that this string is passed ByRef and not ByVal. Privacy Policy and The source code of the bas module is included with the article. How many wagons do you need for arming 500 irregulars? 8+ characters (letters, numbers, and a symbol). Our community of experts have been thoroughly vetted for their expertise and industry experience. Learn more. I leave that to the reader to check. by a "," of the local Value variable in case the regional settings such that the decimal separator is a comma. Podcast 283: Cleaning up the cloud to help fight climate change, Creating new Help Center documents for Review queues: Project overview. I have never coded in vbscript. The JSON.parse() function is included in all major browsers and in the latest ECMAScript (JavaScript) standard. Making statements based on opinion; back them up with references or personal experience. Algorithm for Apple IIe and Apple IIgs boot/start beep. The following constants have been defined at the top of the module: The GenerateStringArray method stores the length of the JSON string in a private variable for later use (instead of recalculating in each of the methods the length of the JSON string) and stores the Unicode value for each character in the m_str array. Parse the data with JSON.parse(), and the … Last Modified: 2014-01-02. I must be missing something. In the following sections, I treat some of the functions and methods that I have refactored to gain the improved performance to get the idea across. Here we get an error, "Object needed" respetively "Object missing", Last Visit: 3-Nov-20 9:31 Last Update: 3-Nov-20 9:31, http://www.ediy.co.nz/vbjson-json-parser-library-in-vb6-xidc55680.html, http://www.aivosto.com/vbtips/stringopt.html, http://www.vbaccelerator.com/home/VB/Code/Techniques/StringBuilder/article.asp, how would you recommend serializing the objects that Parse returns, Re: how would you recommend serializing the objects that Parse returns, Re: Acces data deeper in the JSON structur. Here is the original method: Again, it makes use of string comparisons which I have improved by using the m_str array, the m_length variable and the constants that are declared in the module. This page also contains a list of many pieces of software related to JSON. As long as the response from the server is written in JSON format, you can The optimized parser only contains methods to parse JSON, not to generate JSON. Script Control or JScript on the server side as an intermediary. 1 Solution. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. Experts with Gold status have received one of our highest-level Expert Awards, which recognize experts for their valuable contributions. The original parseNumber method works fine for those locales where a the decimal separator is a period, but not for those where it is a comma. You can request JSON from the server by using an AJAX request. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A JSON array is JSON that begins with "[" and ends with "]". Why sister [nouns] and not brother [nouns]? Author has published a graph but won't share their results table. But I have a JSON file that looks like this which is online. 30;}", "city":"New York"}'; W3Schools is optimized for learning and training. What's wrong with the "airline marginal cost pricing" argument? I have used the VB-JSON parser library in one of my projects (VB6/VBA) to parse the JSON response of a JSON webservice. Can you change the link in your answer as the link is personal? For example, this is a JSON array that contains 3 JSON objects. Examples of usage of MSScriptControl.ScriptControl components, Introduction of MSScriptControl. The skipChar method is a method that moves the index or cursor forward in the JSON string. Method 1 of VBScript parsing JSON characters into JSON objects Furthermore, there’s a number of other “hand-made” parsers that seem to suffer the same faulty algorithm. Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages. Friends who need it can refer to it. )([""\\\x00-\x1f])", 'Return a JSON string representation of a VBScript data structure, 'Supports the following objects and types, Set buf = CreateObject ( "Scripting.Dictionary" ), Case vbInteger , vbLong , vbSingle , vbDouble, If g Then g = False Else buf.Add buf.Count, ",", buf.Add buf.Count, """" & i & """" & ":" & Encode(obj(i)), Err .Raise 8732 ,, "None dictionary object", buf.Add buf.Count, """" & CStr (obj) & """", 'Return the VBScript representation of ``str(``, 'Performs the following translations in decoding, Private Function ScanOnce( ByRef str, ByRef idx), ElseIf c = "n" And StrComp ( "null" , Mid (str, idx, 4 )) = 0 Then, ElseIf c = "t" And StrComp ( "true" , Mid (str, idx, 4 )) = 0 Then, ElseIf c = "f" And StrComp ( "false" , Mid (str, idx, 5 )) = 0 Then, Set ms = NumberRegex.Execute( Mid (str, idx)), Err .Raise 8732 ,, "No JSON object could be ScanOnced", Private Function ParseObject( ByRef str, ByRef idx), Set ParseObject = CreateObject ( "Scripting.Dictionary" ), Err .Raise 8732 ,, "Expecting property name", Err .Raise 8732 ,, "Expecting : delimiter", Err .Raise 8732 ,, "Expecting , delimiter", Private Function ParseArray( ByRef str, ByRef idx), Set values = CreateObject ( "Scripting.Dictionary" ), Private Function ParseString( ByRef str, ByRef idx), Dim chunks, content, terminator, ms, esc, char, Set chunks = CreateObject ( "Scripting.Dictionary" ), Set ms = StringChunk.Execute( Mid (str, idx)), Err .Raise 8732 ,, "Unterminated string starting", Err .Raise 8732 ,, "Invalid control character", Case Else Err .Raise 8732 ,, "Invalid escape", Char = ChrW( "&H" & Mid (str, idx + 1 , 4 )), Private Function SkipWhitespace( ByRef str, ByVal idx), InStr (Whitespace, Mid (str, idx, 1 )) > 0, Set fso = WScript.
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