How make URLencode?

Core Library Questions

chvs2002

in Core Library Questions • 1 year ago

I'm using Processing.net to get data in a server:

import processing.net.*;

import processing.serial.*;

Client c;

String data;

...

But i need pass some parameters in the URL...

String vUrl=addr+ vParam;

println(vUrl); // result .../gettemp.asp?temperatura=24 &data=30/7/2012 22:53:59

c.write("GET "+ vUrl + " HTTP/1.1\r\n");

c.write("Host: "+domain+"\r\n");

...

I get 404 ERROR IN SERVER (not found)

I need encode the URL, but how can i do this in Processing?

Replies(3)

PhiLho

Re: How make URLencode?

1 year ago

It is useful to remember that Processing is made in Java for your searches.
For example, I found: http://stackoverflow.com/questions/724043/http-url-address-encoding-in-java

chvs2002

Re: How make URLencode?

1 year ago

Hi PhiLho

thank you.

This is my first time with Java and i want to avoid using libraries for now.

After your help, I found a "function"

...

String vUrl=addr+ URLEncode(vParametros);

...

String URLEncode(String string){

String output = new String();

try{

byte[] input = string.getBytes("UTF-8");

for(int i=0; i<input.length; i++){

if(input[i]<0)

output += '%' + hex(input[i]);

else if(input[i]==32)

output += '+';

else

output += char(input[i]);

}

catch(UnsupportedEncodingException e){

e.printStackTrace();

}

return output;

}

For now, it worked.

PhiLho

Re: How make URLencode?

1 year ago

The code shown in the link I gave uses plain Java classes, shipped with your JRE, so no libraries are involved there.