URL Encoding/Decoding-CodePudding

I have the string below and I am trying to format it as https://any_site/any_item_picture to be able to download the image from any specific server.

output=["https://i5.walmartimages.com/asr/a4ae31fc-572f-45a3-9d2a-4bf311b27e5d_1.ce84f66fa446e24c989f7f43f0a2a665.jpeg?odnHeight=450&odnWidth=450&odnBg=ffffff"

From the original variable, my code below replaces backslashes, and some other characters like "[" to URL scape codes, which I don't need. It also shows an error :

W/System.err: java.net.MalformedURLException: no protocol: ["https://i5.walmartimages.com/asr/a4ae3

The code is as follows:

  @Override
                public void onResponse(String output) {
                    String backslash = output;
                    String imageurl = null;
                    try {
                        imageurl =  URLEncoder.encode(output, "UTF-8");


                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                    }

The response after running the code:

22-10-31 15:09:20.472 10428-10428/com.example.weatherapp D/response: ["https:\/\/i5.walmartimages.com\/asr\/a4ae31fc-572f-45a3-9d2a-4bf311b27e5d_1.ce84f66fa446e24c989f7f43f0a2a665.jpeg?odnHeight=450&odnWidth=450&odnBg=ffffff

Can anyone please, point in the right direction?

Thanks

CodePudding user response：

You have to extract the url first and then encode it. Encoding will not change your string. URL encoding converts characters into a format that can be transmitted over the network.

        public static void  main(String[] args) {
            List<String> extractedUrls = extractUrls("output=[\"https://i5.walmartimages.com/asr/a4ae31fc-572f-45a3-9d2a-4bf311b27e5d_1.ce84f66fa446e24c989f7f43f0a2a665.jpeg?odnHeight=450&odnWidth=450&odnBg=ffffff\"");
    
            for (String url : extractedUrls)
            {
                System.out.println("url "   url);
                try {
                    System.out.println("encodedUrl "   URLEncoder.encode(url, "UTF-8"));
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
            }
        }
    
        public static List<String> extractUrls(String text)
        {
            List<String> containedUrls = new ArrayList<String>();
            String urlRegex = "((https?|ftp|gopher|telnet|file):((//)|(\\\\)) [\\w\\d:#@%/;$()~_?\\ -=\\\\\\.&]*)";
            Pattern pattern = Pattern.compile(urlRegex, Pattern.CASE_INSENSITIVE);
            Matcher urlMatcher = pattern.matcher(text);
    
            while (urlMatcher.find())
            {
                containedUrls.add(text.substring(urlMatcher.start(0),
                        urlMatcher.end(0)));
            }
    
            return containedUrls;
        }

Output:

url https://i5.walmartimages.com/asr/a4ae31fc-572f-45a3-9d2a-4bf311b27e5d_1.ce84f66fa446e24c989f7f43f0a2a665.jpeg?odnHeight=450&odnWidth=450&odnBg=ffffff

encodedUrl https://i5.walmartimages.com/asr/a4ae31fc-572f-45a3-9d2a-4bf311b27e5d_1.ce84f66fa446e24c989f7f43f0a2a665.jpeg?odnHeight=450&odnWidth=450&odnBg=ffffff