Lets say I have a yaml file which I want to validate in Angular6. If yaml file is parsed in json or other format successfully then say it's a valid yaml file otherwise it's not.
I found javascript and java has the solution for this question , but I wanted to do it using angular6.Is it possible to parse using angular and validate it?
I'm not sure WHY you'd want to parse a .yml file from Angular (vs., say, a standalone NodeJS app).
But sure.
The easiest way is probably to add a 3rd party library to your Angular build project (npm install --save), then invoke it from your Angular app.
js-yaml is a good choice: https://www.npmjs.com/package/js-yaml
EXAMPLE CODE (nodeJS):
yaml = require('js-yaml');
fs = require('fs');
// Get document, or throw exception on error
try {
var doc = yaml.safeLoad(fs.readFileSync('/home/ixti/example.yml', 'utf8'));
console.log(doc);
} catch (e) {
console.log(e);
}
Related
I have a url similar to https://www.nonexistentsite.com/fubar.json where fubar.json is a public json file which will download to your file system if you navigate to the url with your browser. I have a React web app where I want to read that file directly so as to display some of its data. I don't want to bother with any kind of a backend that would download the file to the apps file system so that it can read it. I want the React front end to read it directly in it's client side code with a fetch or an axios call or something like that. I'm familiar with the typical situation where I have a REST url like https://www.nonexistentsite.com/fubar which I can call and get the data. I'm failing to find info on how to handle this situation.
You could use Axios to load the data from the json file.
Example usage;
axios.get('https://www.nonexistentsite.com/fubar.json')
.then(jsoncontent => {
console.log(jsoncontent);
//do stuff with jsoncontent here
});
Maybe I'm misunderstanding your question, but I believe if you are just needing to fetch the json from a hosted file, you should be able to do so with axios.get(url)
I am trying to get data of "value" from a data file
{"success":"true","value":"500","items":"12","currency":"NOK"}
this is what i think should work.
<div class="value"></div>
<script>
$.get('URLTOFILE', function(data) {
var text = `Value: ${data.value|| "Not Found"}`
$(".value").html(text);
});
</script>
Is your json file hosted on a server somewhere? If so, are you getting any errors when you attempt to fetch it?
If the json file is simply a file on your computer, you won't be able to load it like that. If you are using webpack or another package manager to bundle your files, you can use import to import the file into your javascript file like so:
import json from "file.json";
console.log("My json: ", json);
// Rest of javascript file here
This assumes that you've set up your bundler to handle json files though. Webpack does this for you automatically. So if you're using it, then this should work. Not sure about other bundlers though.
But it's best to host the file on a server and fetch it, especially if the data changes constantly - such as from an API.
I'm using Superagent in my react app, and i'm making some call's to the IPFS api. Specifically, I am uploading files to my IPFS server. Now, everything works, When I upload one or multiple files the call goes through and the files show up in IPFS no problem.
A problem occurs when I upload multiple files though, the response seems to come back as plain text, instead of JSON, and superagent throws the error
client.js:399 Uncaught (in promise) Error: Parser is unable to parse the response
at Request.<anonymous> (client.js:399)
at Request.Emitter.emit (index.js:133)
at XMLHttpRequest.xhr.onreadystatechange (client.js:708)
So to be clear, when uploading a single file, I get a nice JSON response, but when I upload multiple files, the response is in plain text.
Can I force Superagent to give me the response back and parse it myself? Or can I set something when making the call so that it forces a json parse? Below is my superagent request function
add : acceptedFiles => {
const url = ipfs.getUrl("add")
const req = request.post(url)
acceptedFiles.forEach(file => req.attach(file.name, file))
req.then(res => {
return console.log(res);
})
}
I'm searching for this for a more elegant solution, but before I would have found it , I'd like to provide my own solution.
I think this problem caused by wrong responsive Content-Type set, but I've not confirmed this opinion yet.
However, you can try this:
req.catch(function (err) {
console.log(err.rawResponse)
})
At least, this solves my problem.
According to their docs you can specify custom parser that will take precedence over built-in parser:
You can set a custom parser (that takes precedence over built-in parsers) with the .buffer(true).parse(fn) method. If response buffering is not enabled (.buffer(false)) then the response event will be emitted without waiting for the body parser to finish, so response.body won't be available.
I tried and it worked well for me.
superagent.get('....')
.buffer(true)
.parse(({ text }) => JSON.parse(text))
.then(...)
I'm using typescript and I'm trying to declare a variable with the data from my json file. I already made some interfaces using js2ts.com. But I don't know how to call the json file in my typescript file.
If it's just a json file/structure, you're going to need to make an AJAX call to it like it was a server resource. If it's an object within a module/library, you can import the object. I'm assuming this is a web app, since you mentioned ionic. If it were a NodeJS app, you could load the resource using the fs module.
Some flavor of the following should work:
$http({
method: 'GET',
url: '/PATH_TO_JSON'
}).then(function success(response) {
// Success handling
}, function failure(response) {
// Error handling
});
If you are attempting to access the file when it is on the device, look into the Cordova File API.
I want to parse the response coming from the server in JSON format. I have done some googling but i can't find any library or jar kind of thing.
Everywhere there is provided open source code as zip file.
How can i achieve this? if there is no jar available for blackberry then how to use that open source code in my application??
There is an open source JSON for J2ME API on Mobile and Embedded Application Developers Project
Also you can download JSON ME (Zip file) at JSON.org not supported anymore. But you can get it from here.
I believe you can simply copy content of json project src folder to your Blackberry project src folder, refresh it in eclipse package explorer and build it.
See for details: Using JavaScript Object Notation (JSON) in Java ME for Data Interchange
I am developing a Blackberry client application and I confronted the same problem. I was searching for JSON way of parsing the response which I get from the server. I am using Eclipse plug-in for BB as IDE and it comes with BB SDK including the ones for JSON.
The easiest answer to this question is that:
Initially do not forget to use this import statement:
import org.json.me.JSONObject;
Then assign your JSON formatted response from the server to a String variable:
String jsonStr = "{\"team\":\"Bursaspor\",\"manager\":\"Ertuğrul Sağlam\",\"year\":\"2010\"}";
Create a JSONObject:
JSONObject obj = new JSONObject(jsonStr);
i.e. if you want to use the value of the "team" field which is "Bursaspor" then you should use your JSONObject like this:
obj.getString("team")
This call will return the string value which is "Bursaspor".
P.S: I inspired this solution from this site which simply explains the solution of the same problem for Android development.
http://trandroid.com/2010/05/17/android-ile-json-parse-etme-ornegi-1/
When you got response string then use this code
try {
JSONObject jsonres = new JSONObject(jsons);
System.out.println("Preview icon from jsonresp:"+jsonres.getString("mydata"));
} catch (JSONException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
one thing jsons is your response string which is in json format & mydata your key of data so you can get your data from JSONObject. Thnks
chek this post to find out how to get JSONME source from SVN:
http://www.java-n-me.com/2010/11/how-to-import-source-code-from-svn-to.html
Hope it helps someone.
You can also try :
http://pensivemode.fileave.com/verified_json.jar
I was also looking for a jar version of json (to link along my lib) :
https://radheshg.wordpress.com/tag/json/
but it seems not portable :
Building example
C:\Program Files (x86)\Research In Motion\BlackBerry JDE 4.5.0\bin\rapc.exe -quiet import="C:\Program Files (x86)\Research In Motion\BlackBerry JDE 4.5.0\lib\net_rim_api.jar";lib\${PROJECT}.jar;lib\json.jar codename=example\example example\example.rapc warnkey=0x52424200;0x52525400;0x52435200 Y:\src\${PROJECT}-java.git\example\src\mypackage\MyApp.java Y:\src\${PROJECT}-java.git\example\src\mypackage\MyScreen.java
tmp3139/org/json/me/JSONArray.class: Error!: Invalid class file: Incorrect classfile version
Error while building project
http://supportforums.blackberry.com/t5/Java-Development/JSON-library/m-p/573687#M117982
So far JSON.simple is looking like a great viable option.
JSONParser parser=new JSONParser();
System.out.println("=======decode=======");
String s="[0,{\"1\":{\"2\":{\"3\":{\"4\":[5,{\"6\":7}]}}}}]";
Object obj=parser.parse(s);
JSONArray array=(JSONArray)obj;
System.out.println("======the 2nd element of array======");
System.out.println(array.get(1));
System.out.println();