convert UTF 8 string to URL (ajax) - javascript

I have a string for example, that may contain special characters (+,=,&, etc...):
"Írja ide kérdését, majd üssön entert!"
and I would like to convert it to URL accepteble string for XHR like (because IE does not do it automatically):
"%C3%8Drja%20ide%20k%C3%A9rd%C3%A9s%C3%A9t,%20majd%20%C3%BCss%C3%B6n%20entert!"
Is there any javascript function for this?
Thank you!

You should use the encodeURI function:
encodeURI("Írja ide kérdését, majd üssön entert!");
// => "%C3%8Drja%20ide%20k%C3%A9rd%C3%A9s%C3%A9t,%20majd%20%C3%BCss%C3%B6n%20entert!"

You have added a + sign.
To encode this plus sign too, use the encodeURIComponent function:
encodeURIComponent("+Írja ide kérdését, majd üssön entert!");
// => "%2B%C3%8Drja%20ide%20k%C3%A9rd%C3%A9s%C3%A9t%2C%20majd%20%C3%BCss%C3%B6n%20entert!"
Check this thread for more informations about the differences between escape, encodeURI and encodeURIComponent functions.

Related

JSON parse a decodedURI failed? [duplicate]

What is the difference between the JavaScript functions decodeURIComponent and decodeURI?
To explain the difference between these two let me explain the difference between encodeURI and encodeURIComponent.
The main difference is that:
The encodeURI function is intended for use on the full URI.
The encodeURIComponent function is intended to be used on .. well .. URI components that is
any part that lies between separators (; / ? : # & = + $ , #).
So, in encodeURIComponent these separators are encoded also because they are regarded as text and not special characters.
Now back to the difference between the decode functions, each function decodes strings generated by its corresponding encode counterpart taking care of the semantics of the special characters and their handling.
encodeURIComponent/decodeURIComponent() is almost always the pair you want to use, for concatenating together and splitting apart text strings in URI parts.
encodeURI in less common, and misleadingly named: it should really be called fixBrokenURI. It takes something that's nearly a URI, but has invalid characters such as spaces in it, and turns it into a real URI. It has a valid use in fixing up invalid URIs from user input, and it can also be used to turn an IRI (URI with bare Unicode characters in) into a plain URI (using %-escaped UTF-8 to encode the non-ASCII).
Where encodeURI should really be named fixBrokenURI(), decodeURI() could equally be called potentiallyBreakMyPreviouslyWorkingURI(). I can think of no valid use for it anywhere; avoid.
js> s = "http://www.example.com/string with + and ? and & and spaces";
http://www.example.com/string with + and ? and & and spaces
js> encodeURI(s)
http://www.example.com/string%20with%20+%20and%20?%20and%20&%20and%20spaces
js> encodeURIComponent(s)
http%3A%2F%2Fwww.example.com%2Fstring%20with%20%2B%20and%20%3F%20and%20%26%20and%20spaces
Looks like encodeURI produces a "safe" URI by encoding spaces and some other (e.g. nonprintable) characters, whereas encodeURIComponent additionally encodes the colon and slash and plus characters, and is meant to be used in query strings. The encoding of + and ? and & is of particular importance here, as these are special chars in query strings.
As I had the same question, but didn't find the answer here, I made some tests in order to figure out what the difference actually is.
I did this, since I need the encoding for something, which is not URL/URI related.
encodeURIComponent("A") returns "A", it does not encode "A" to "%41"
decodeURIComponent("%41") returns "A".
encodeURI("A") returns "A", it does not encode "A" to "%41"
decodeURI("%41") returns "A".
-That means both can decode alphanumeric characters, even though they did not encode them. However...
encodeURIComponent("&") returns "%26".
decodeURIComponent("%26") returns "&".
encodeURI("&") returns "&".
decodeURI("%26") returns "%26".
Even though encodeURIComponent does not encode all characters, decodeURIComponent can decode any value between %00 and %7F.
Note: It appears that if you try to decode a value above %7F (unless it's a unicode value), then your script will fail with an "URI error".
encodeURIComponent()
Converts the input into a URL-encoded
string
encodeURI()
URL-encodes the input, but
assumes a full URL is given, so
returns a valid URL by not encoding
the protocol (e.g. http://) and
host name (e.g.
www.stackoverflow.com).
decodeURIComponent() and decodeURI() are the opposite of the above
decodeURIComponent will decode URI special markers such as &, ?, #, etc, decodeURI will not.
encodeURIComponent
Not Escaped:
A-Z a-z 0-9 - _ . ! ~ * ' ( )
encodeURI()
Not Escaped:
A-Z a-z 0-9 ; , / ? : # & = + $ - _ . ! ~ * ' ( ) #
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI
Encode URI:
The encodeURI() method does not encodes:
, / ? : # & = + $ * #
Example
URI: https://my test.asp?name=ståle&car=saab
Encoded URI: https://my%20test.asp?name=st%C3%A5le&car=saab
Encode URI Component:
The encodeURIComponent() method also encodes:
, / ? : # & = + $ #
Example
URI: https://my test.asp?name=ståle&car=saab
Encoded URI: https%3A%2F%2Fmy%20test.asp%3Fname%3Dst%C3%A5le%26car%3Dsaab
For More: W3Schoools.com

Decode UTF16 encoded string (URL) in Java Script

I have string that is encoded in UTF16 and i want to decode it using JS, when i use simple decodeURI()
function i get the desired result but in case when special characters are there in the string like á, ó, etc it do not decodes.
On more analysis i came to know that these characters in the encoded string contains the ASCII value.
Say I have string "Acesse já, Encoded version : "Acesse%20j%E1". How can i get the string from the encode version using java script?
EDIT:
The string is a part of URL
Ok, your string seems to have been encoded using escape, use unescape to decode it!
unescape('Acesse%20j%E1'); // => 'Acesse já'
However, escape and unescape are deprecated, you’d better use encodeURI or encodeURIComponent here.
encodeURIComponent('Acesse já'); // => 'Acesse%20j%C3%A1'
decodeURIComponent('Acesse%20j%C3%A1'); // => 'Acesse já'

encoding json to string

I'm interested how does google encode POST params.
In one of a application I've found the following approach, let say I have the following object:
selection={"ty":"mc","cl":{"loc_type":0,"si":9,"aps":false},"sr":[]}
In POST request it takes the following form:
selection=%7B%22ty%22%3A%22mc%22%2C%22cl%22%3A%7B%22loc_type%22%3A0%2C%22si%22%3A9%2C%22aps%22%3Afalse%7D%2C%22sr%22%3A%5B%5D%7D
Which is method is applied here?
The same effect can be achieved by using encodeURIComponent and JSON.stringify functions:
"selection=" + encodeURIComponent(JSON.stringify(selection))
It's simply URL encoding
Check out the built-in function encodeURIComponent(str) and encodeURI(str)
the method in javascript is called encodeURIComponent() write
alert(encodeURIComponent('{"ty":"mc","cl":{"loc_type":0,"si":9,"aps":false},"sr":[]}'));
It is called URL-Encoding.
It replaces non-ASCII characters and characters that have a special meaning in the URI scheme with a ASCII representation: Each character that isn't printable will be written as %xy where xy is the index inside the ASCII table of that character.
There are many programming languages supporting it out-of-the-box:
In JavaScript you can use the encodeURIComponent() or encodeURI() function.
You can easily invoke it like this, e.g.:
var myjson = '{my:json}';
url_encoded_json = encodeURIComponent( myjson );
alert(url_encoded_json);
In other languages:
PHP has the rawurlencode() function.
ASP has the Server.URLEncode() function.
Python has the urllib.urlencode() function.
Java has the java.net.URI(url).toASCIIString() function

Percent encoding javascript

Is there a javascript function that takes a string and converts it into another string that is percent-encoded? That way something like "This Guy" turns into "This%20Guy".
Thanks
encodeURI, encodeURIComponent or escape will work the same way for your string, but they differ in details.
encodeURI is just for escaping URLs
encodeURIComponent also escapes = and &
escape works differently with non-ASCII unicode symbols
encodeURI("Ω") === encodeURIComponent("Ω") === "%CE%A9"
escape("Ω") === "%u03A9"
if you need to send a string as part of request, use encodeURIComponent
Try encodeURIComponent() or escape()
Try this encodeURIComponent()
var stringToDecode = "J&K";
var encodedString = encodeURIComponent(stringToDecode );
Use decodeURIComponent() to decode it again when needed
More Info here
https://en.wikipedia.org/wiki/Percent-encoding#Percent-encoding_reserved_characters
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
Yes, here is
escape('This Guy');

Some encoded Javascript that I need in plain text

I'm having some issues trying to decode some javascript.. I have no idea what kind of encoding this is.. i tried base 64 decoders etc. If you can please help me out with this, here's a fragment of the code:
\x69\x6E\x6E\x65\x72\x48\x54\x4D\x4C","\x61\x70\x70\x34\x39\x34\x39\x3
Any ways I can get plain text from that?
Thanks!
\xNN is an escape sequence. NN is a hexidecimal number (00 to FF) that represents a Latin-1 character.
Escape sequences are interpreted literally within a string. So:
"\x69" === "i" // true
The escape() function encodes a
string.
This function makes a string portable,
so it can be transmitted across any
network to any computer that supports
ASCII characters.
This function encodes special
characters, with the exception of: * #
- _ + . /
The reverse of escape() is the unescape() function.
Try this:
alert(unescape("\x69\x6E\x6E\x65\x72\x48\x54\x4D\x4C\x61\x70\x70\x34\x39\x34\x39\x3"));
Edit: As J-P mentioned unescape isn't really needed here after all.
These are simply hex-values of symbols.
\x69 = i, etc. First several letters: "innerHTML", "ap…"
I think you should use window.unescape(), or unescape()

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