file ftp mailto http https jar netdoc

<?php
$url = 'gopher://35.185.163.134:2333/_joy%0achou';
header("location: $url");
?>

https://localhost:8080/urlConnection?url=https://joychou.me/302.php

java.net.MalformedURLException: unknown protocol: gopher

    private boolean followRedirect() throws IOException {
        if(!this.getInstanceFollowRedirects()) {
            return false;
        } else {
            final int var1 = this.getResponseCode();
            if(var1 >= 300 && var1 <= 307 && var1 != 306 && var1 != 304) {
                final String var2 = this.getHeaderField("Location");
                if(var2 == null) {
                    return false;
                } else {
                    URL var3;
                    try {
                        // 该行代码发生异常，var2变量值为`gopher://35.185.163.134:2333/_joy%0achou`
                        var3 = new URL(var2);
                        /* 该行代码，表示传入的协议必须和重定向的协议一致
                         * 即https://joychou.me/302.php的协议必须和gopher://35.185.163.134:2333/_joy%0achou一致
                         */
                        if(!this.url.getProtocol().equalsIgnoreCase(var3.getProtocol())) {
                            return false;
                        }
                    } catch (MalformedURLException var8) {
                        var3 = new URL(this.url, var2);
                    }