core/src/main/java/hudson/util/FormValidation.java [464:484]:
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        protected BufferedReader open(URL url) throws IOException {
            // use HTTP content type to find out the charset.
            URLConnection con = ProxyConfiguration.open(url);
            if (con == null) { // TODO is this even permitted by URL.openConnection?
                throw new IOException(url.toExternalForm());
            }
            return new BufferedReader(
                new InputStreamReader(con.getInputStream(),getCharset(con)));
        }

        /**
         * Finds the string literal from the given reader.
         * @return
         *      true if found, false otherwise.
         */
        protected boolean findText(BufferedReader in, String literal) throws IOException {
            String line;
            while((line=in.readLine())!=null)
                if(line.contains(literal))
                    return true;
            return false;
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core/src/main/java/hudson/util/FormFieldValidator.java [258:278]:
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        protected BufferedReader open(URL url) throws IOException {
            // use HTTP content type to find out the charset.
            URLConnection con = ProxyConfiguration.open(url);
            if (con == null) { // TODO is this even permitted by URL.openConnection?
                throw new IOException(url.toExternalForm());
            }
            return new BufferedReader(
                new InputStreamReader(con.getInputStream(),getCharset(con)));
        }

        /**
         * Finds the string literal from the given reader.
         * @return
         *      true if found, false otherwise.
         */
        protected boolean findText(BufferedReader in, String literal) throws IOException {
            String line;
            while((line=in.readLine())!=null)
                if(line.contains(literal))
                    return true;
            return false;
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