2024年大智慧教你学Java 没有绝对安全的体系，数据结构与算法面试题
给各人的福利零底子入门
对于从来没有打仗过网络安全的同学，我们帮你预备了详细的学习成长路线图。可以说是最科学最体系的学习路线，各人跟着这个大的方向学习准没问题。
https://img-blog.csdnimg.cn/img_convert/95608e9062782d28f4f04f821405d99a.png
同时每个成长路线对应的板块都有配套的视频提供：
https://img-blog.csdnimg.cn/direct/a91b9e8100834e9291cfcf1695d8cd42.png#pic_center
因篇幅有限，仅展示部分资料
网络安全面试题
https://img-blog.csdnimg.cn/img_convert/80674985176a4889f7bb130756893764.png
绿盟护网举措
https://img-blog.csdnimg.cn/img_convert/9f3395407120bb0e1b5bf17bb6b6c743.png
另有各人最喜欢的黑客技能
https://img-blog.csdnimg.cn/img_convert/5912337446dee53639406fead3d3f03c.jpeg
网络安全源码合集+工具包
https://img-blog.csdnimg.cn/img_convert/5072ce807750c7ec721c2501c29cb7d5.png
https://img-blog.csdnimg.cn/img_convert/4a5f4281817dc4613353c120c9543810.png
全部资料共282G，朋侪们假如有必要全套《网络安全入门+黑客进阶学习资源包》，可以扫描下方二维码领取（如遇扫码问题，可以在批评区留言领取哦）~
网上学习资料一大堆，但假如学到的知识不成体系，遇到问题时只是浅尝辄止，不再深入研究，那么很难做到真正的技能提升。
必要这份体系化资料的朋侪，可以点击这里获取
一个人可以走的很快，但一群人才气走的更远！岂论你是正从事IT行业的老鸟或是对IT行业感爱好的新人，都欢迎加入我们的的圈子（技能交换、学习资源、职场吐槽、大厂内推、面试辅导），让我们一起学习成长！
/\*\* regex flag union representing /si modifiers in php \*\*/
private static final int REGEX_FLAGS_SI = Pattern.CASE_INSENSITIVE | Pattern.DOTALL;
private static final Pattern P_COMMENTS = Pattern.compile("<!--(.\*?)-->", Pattern.DOTALL);
private static final Pattern P_COMMENT = Pattern.compile("^!--(.\*)--$", REGEX_FLAGS_SI);
private static final Pattern P_TAGS = Pattern.compile("<(.\*?)>", Pattern.DOTALL);
private static final Pattern P_END_TAG = Pattern.compile("^/(+)", REGEX_FLAGS_SI);
private static final Pattern P_START_TAG = Pattern.compile("^(+)(.\*?)(/?)$", REGEX_FLAGS_SI);
private static final Pattern P_QUOTED_ATTRIBUTES = Pattern.compile("(+)=([\"'])(.\*?)\\2", REGEX_FLAGS_SI);
private static final Pattern P_UNQUOTED_ATTRIBUTES = Pattern.compile("(+)(=)([^\"\\s']+)", REGEX_FLAGS_SI);
private static final Pattern P_PROTOCOL = Pattern.compile("^([^:]+):", REGEX_FLAGS_SI);
private static final Pattern P_ENTITY = Pattern.compile("&#(\\d+);?");
private static final Pattern P_ENTITY_UNICODE = Pattern.compile("&#x(+);?");
private static final Pattern P_ENCODE = Pattern.compile("%({2});?");
private static final Pattern P_VALID_ENTITIES = Pattern.compile("&([^&;]\*)(?=(;|&|$))");
private static final Pattern P_VALID_QUOTES = Pattern.compile("(>|^)([^<]+?)(<|$)", Pattern.DOTALL);
private static final Pattern P_END_ARROW = Pattern.compile("^>");
private static final Pattern P_BODY_TO_END = Pattern.compile("<([^>]\*?)(?=<|$)");
private static final Pattern P_XML_CONTENT = Pattern.compile("(^|>)([^<]\*?)(?=>)");
private static final Pattern P_STRAY_LEFT_ARROW = Pattern.compile("<([^>]\*?)(?=<|$)");
private static final Pattern P_STRAY_RIGHT_ARROW = Pattern.compile("(^|>)([^<]\*?)(?=>)");
private static final Pattern P_AMP = Pattern.compile("&");
private static final Pattern P_QUOTE = Pattern.compile("<");
private static final Pattern P_LEFT_ARROW = Pattern.compile("<");
private static final Pattern P_RIGHT_ARROW = Pattern.compile(">");
private static final Pattern P_BOTH_ARROWS = Pattern.compile("<>");
// @xxx could grow large... maybe use sesat's ReferenceMap
private static final ConcurrentMap<String,Pattern> P_REMOVE_PAIR_BLANKS = new ConcurrentHashMap<String, Pattern>();
private static final ConcurrentMap<String,Pattern> P_REMOVE_SELF_BLANKS = new ConcurrentHashMap<String, Pattern>();
/\*\* set of allowed html elements, along with allowed attributes for each element \*\*/
private final Map<String, List<String>> vAllowed;
/\*\* counts of open tags for each (allowable) html element \*\*/
private final Map<String, Integer> vTagCounts = new HashMap<String, Integer>();
/\*\* html elements which must always be self-closing (e.g. "<img />") \*\*/
private final String[] vSelfClosingTags;
/\*\* html elements which must always have separate opening and closing tags (e.g. "<b></b>") \*\*/
private final String[] vNeedClosingTags;
/\*\* set of disallowed html elements \*\*/
private final String[] vDisallowed;
/\*\* attributes which should be checked for valid protocols \*\*/
private final String[] vProtocolAtts;
/\*\* allowed protocols \*\*/
private final String[] vAllowedProtocols;
/\*\* tags which should be removed if they contain no content (e.g. "<b></b>" or "<b />") \*\*/
private final String[] vRemoveBlanks;
/\*\* entities allowed within html markup \*\*/
private final String[] vAllowedEntities;
/\*\* flag determining whether comments are allowed in input String. \*/
private final boolean stripComment;
private final boolean encodeQuotes;
private boolean vDebug = false;
/\*\*
* flag determining whether to try to make tags when presented with “unbalanced”
* angle brackets (e.g. “<b text ” becomes “ text ”). If set to false,
* unbalanced angle brackets will be html escaped.
*/
private final boolean alwaysMakeTags;
/\*\* Default constructor.
*
*/
public HTMLFilter() {
vAllowed = new HashMap<>();
final ArrayList<String> a_atts = new ArrayList<String>();
a_atts.add("href");
a_atts.add("target");
vAllowed.put("a", a_atts);
final ArrayList<String> img_atts = new ArrayList<String>();
img_atts.add("src");
img_atts.add("width");
img_atts.add("height");
img_atts.add("alt");
vAllowed.put("img", img_atts);
final ArrayList<String> no_atts = new ArrayList<String>();
vAllowed.put("b", no_atts);
vAllowed.put("strong", no_atts);
vAllowed.put("i", no_atts);
vAllowed.put("em", no_atts);
vSelfClosingTags = new String[]{"img"};
vNeedClosingTags = new String[]{"a", "b", "strong", "i", "em"};
vDisallowed = new String[]{};
vAllowedProtocols = new String[]{"http", "mailto", "https"}; // no ftp.
vProtocolAtts = new String[]{"src", "href"};
vRemoveBlanks = new String[]{"a", "b", "strong", "i", "em"};
vAllowedEntities = new String[]{"amp", "gt", "lt", "quot"};
stripComment = true;
encodeQuotes = true;
alwaysMakeTags = true;
}
/\*\* Set debug flag to true. Otherwise use default settings. See the default constructor.
*
* @param debug turn debug on with a true argument
*/
public HTMLFilter(final boolean debug) {
this();
vDebug = debug;
}
/\*\* Map-parameter configurable constructor.
*
* @param conf map containing configuration. keys match field names.
*/
public HTMLFilter(final Map<String,Object> conf) {
assert conf.containsKey("vAllowed") : "configuration requires vAllowed";
assert conf.containsKey("vSelfClosingTags") : "configuration requires vSelfClosingTags";
assert conf.containsKey("vNeedClosingTags") : "configuration requires vNeedClosingTags";
assert conf.containsKey("vDisallowed") : "configuration requires vDisallowed";
assert conf.containsKey("vAllowedProtocols") : "configuration requires vAllowedProtocols";
assert conf.containsKey("vProtocolAtts") : "configuration requires vProtocolAtts";
assert conf.containsKey("vRemoveBlanks") : "configuration requires vRemoveBlanks";
assert conf.containsKey("vAllowedEntities") : "configuration requires vAllowedEntities";
vAllowed = Collections.unmodifiableMap((HashMap<String, List<String>>) conf.get("vAllowed"));
vSelfClosingTags = (String[]) conf.get("vSelfClosingTags");
vNeedClosingTags = (String[]) conf.get("vNeedClosingTags");
vDisallowed = (String[]) conf.get("vDisallowed");
vAllowedProtocols = (String[]) conf.get("vAllowedProtocols");
vProtocolAtts = (String[]) conf.get("vProtocolAtts");
vRemoveBlanks = (String[]) conf.get("vRemoveBlanks");
vAllowedEntities = (String[]) conf.get("vAllowedEntities");
stripComment =conf.containsKey("stripComment") ? (Boolean) conf.get("stripComment") : true;
encodeQuotes = conf.containsKey("encodeQuotes") ? (Boolean) conf.get("encodeQuotes") : true;
alwaysMakeTags = conf.containsKey("alwaysMakeTags") ? (Boolean) conf.get("alwaysMakeTags") : true;
}
private void reset() {
vTagCounts.clear();
}
private void debug(final String msg) {
if (vDebug) {
Logger.getAnonymousLogger().info(msg);
}
}
//---------------------------------------------------------------
// my versions of some PHP library functions
public static String chr(final int decimal) {
return String.valueOf((char) decimal);
}
public static String htmlSpecialChars(final String s) {
String result = s;
result = regexReplace(P_AMP, "&", result);
result = regexReplace(P_QUOTE, """, result);
result = regexReplace(P_LEFT_ARROW, "<", result);
result = regexReplace(P_RIGHT_ARROW, ">", result);
return result;
}
//---------------------------------------------------------------
/\*\*
* given a user submitted input String, filter out any invalid or restricted
* html.
*
* @param input text (i.e. submitted by a user) than may contain html
* @return “clean” version of input, with only valid, whitelisted html elements allowed
*/
public String filter(final String input) {
reset();
String s = input;
debug("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*");
debug(" INPUT: " + input);
s = escapeComments(s);
debug(" escapeComments: " + s);
s = balanceHTML(s);
debug(" balanceHTML: " + s);
s = checkTags(s);
debug(" checkTags: " + s);
s = processRemoveBlanks(s);
debug("processRemoveBlanks: " + s);
s = validateEntities(s);
debug(" validateEntites: " + s);
debug("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\n\n");
return s;
}
public boolean isAlwaysMakeTags(){
return alwaysMakeTags;
}
public boolean isStripComments(){
return stripComment;
}
private String escapeComments(final String s) {
final Matcher m = P_COMMENTS.matcher(s);
final StringBuffer buf = new StringBuffer();
if (m.find()) {
final String match = m.group(1); //(.\*?)
m.appendReplacement(buf, Matcher.quoteReplacement("<!--" + htmlSpecialChars(match) + "-->"));
}
m.appendTail(buf);
return buf.toString();
}
private String balanceHTML(String s) {
if (alwaysMakeTags) {
//
// try and form html
//
s = regexReplace(P_END_ARROW, "", s);
s = regexReplace(P_BODY_TO_END, "<$1>", s);
s = regexReplace(P_XML_CONTENT, "$1<$2", s);
} else {
//
// escape stray brackets
//
s = regexReplace(P_STRAY_LEFT_ARROW, "<$1", s);
s = regexReplace(P_STRAY_RIGHT_ARROW, "$1$2><", s);
//
// the last regexp causes '<>' entities to appear
// (we need to do a lookahead assertion so that the last bracket can
// be used in the next pass of the regexp)
//
s = regexReplace(P_BOTH_ARROWS, "", s);
}
return s;
}
private String checkTags(String s) {
Matcher m = P_TAGS.matcher(s);
final StringBuffer buf = new StringBuffer();
while (m.find()) {
String replaceStr = m.group(1);
replaceStr = processTag(replaceStr);
m.appendReplacement(buf, Matcher.quoteReplacement(replaceStr));
}
m.appendTail(buf);
s = buf.toString();
// these get tallied in processTag
// (remember to reset before subsequent calls to filter method)
for (String key : vTagCounts.keySet()) {
for (int ii = 0; ii < vTagCounts.get(key); ii++) {
s += "</" + key + ">";
}
}
return s;
}
private String processRemoveBlanks(final String s) {
String result = s;
for (String tag : vRemoveBlanks) {
if(!P_REMOVE_PAIR_BLANKS.containsKey(tag)){
P_REMOVE_PAIR_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]\*)?></" + tag + ">"));
}
result = regexReplace(P_REMOVE_PAIR_BLANKS.get(tag), "", result);
if(!P_REMOVE_SELF_BLANKS.containsKey(tag)){
P_REMOVE_SELF_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]\*)?/>"));
}
result = regexReplace(P_REMOVE_SELF_BLANKS.get(tag), "", result);
}
return result;
}
private static String regexReplace(final Pattern regex_pattern, final String replacement, final String s) {
Matcher m = regex_pattern.matcher(s);
return m.replaceAll(replacement);
}
private String processTag(final String s) {
// ending tags
Matcher m = P_END_TAG.matcher(s);
if (m.find()) {
final String name = m.group(1).toLowerCase();
if (allowed(name)) {
if (!inArray(name, vSelfClosingTags)) {
if (vTagCounts.containsKey(name)) {
vTagCounts.put(name, vTagCounts.get(name) - 1);
return "</" + name + ">";
}
}
}
}
// starting tags
m = P_START_TAG.matcher(s);
if (m.find()) {
final String name = m.group(1).toLowerCase();
final String body = m.group(2);
String ending = m.group(3);
if (allowed(name)) {
String params = "";
final Matcher m2 = P_QUOTED_ATTRIBUTES.matcher(body);
final Matcher m3 = P_UNQUOTED_ATTRIBUTES.matcher(body);
final List<String> paramNames = new ArrayList<String>();
final List<String> paramValues = new ArrayList<String>();
while (m2.find()) {
paramNames.add(m2.group(1)); //(+)
paramValues.add(m2.group(3)); //(.\*?)
}
while (m3.find()) {
paramNames.add(m3.group(1)); //(+)
paramValues.add(m3.group(3)); //([^\"\\s']+)
}
String paramName, paramValue;
for (int ii = 0; ii < paramNames.size(); ii++) {
paramName = paramNames.get(ii).toLowerCase();
paramValue = paramValues.get(ii);
if (allowedAttribute(name, paramName)) {
if (inArray(paramName, vProtocolAtts)) {
paramValue = processParamProtocol(paramValue);
}
params += " " + paramName + "=\"" + paramValue + "\"";
}
}
if (inArray(name, vSelfClosingTags)) {
ending = " /";
}
if (inArray(name, vNeedClosingTags)) {
ending = "";
}
if (ending == null || ending.length() < 1) {
if (vTagCounts.containsKey(name)) {
vTagCounts.put(name, vTagCounts.get(name) + 1);
} else {
vTagCounts.put(name, 1);
}
} else {
ending = " /";
}
return "<" + name + params + ending + ">";
} else {
return "";
}
}
// comments
m = P_COMMENT.matcher(s);
if (!stripComment && m.find()) {
return"<" + m.group() + ">";
}
return "";
}
private String processParamProtocol(String s) {
s = decodeEntities(s);
final Matcher m = P_PROTOCOL.matcher(s);
if (m.find()) {
final String protocol = m.group(1);
if (!inArray(protocol, vAllowedProtocols)) {
// bad protocol, turn into local anchor link instead
s = "#" + s.substring(protocol.length() + 1, s.length());
if (s.startsWith("#//")) {
s = "#" + s.substring(3, s.length());
}
}
}
return s;
}
private String decodeEntities(String s) {
StringBuffer buf = new StringBuffer();
Matcher m = P_ENTITY.matcher(s);
while (m.find()) {
final String match = m.group(1);
final int decimal = Integer.decode(match).intValue();
m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
}
m.appendTail(buf);
s = buf.toString();
buf = new StringBuffer();
m = P_ENTITY_UNICODE.matcher(s);
while (m.find()) {
final String match = m.group(1);
final int decimal = Integer.valueOf(match, 16).intValue();
m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
}
m.appendTail(buf);
s = buf.toString();
buf = new StringBuffer();
m = P_ENCODE.matcher(s);
while (m.find()) {
final String match = m.group(1);
final int decimal = Integer.valueOf(match, 16).intValue();
m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
}
m.appendTail(buf);
s = buf.toString();
s = validateEntities(s);
return s;
}
private String validateEntities(final String s) {
StringBuffer buf = new StringBuffer();
// validate entities throughout the string
Matcher m = P_VALID_ENTITIES.matcher(s);
while (m.find()) {
final String one = m.group(1); //([^&;]\*)
final String two = m.group(2); //(?=(;|&|$))
m.appendReplacement(buf, Matcher.quoteReplacement(checkEntity(one, two)));
}
m.appendTail(buf);
return encodeQuotes(buf.toString());
}
private String encodeQuotes(final String s){
if(encodeQuotes){
StringBuffer buf = new StringBuffer();
Matcher m = P_VALID_QUOTES.matcher(s);
while (m.find()) {
final String one = m.group(1); //(>|^)
final String two = m.group(2); //([^<]+?)
final String three = m.group(3); //(<|$)
m.appendReplacement(buf, Matcher.quoteReplacement(one + regexReplace(P_QUOTE, """, two) + three));
}
m.appendTail(buf);
return buf.toString();
}else{
return s;
}
}
private String checkEntity(final String preamble, final String term) {
return ";".equals(term) && isValidEntity(preamble)
? '&' + preamble
: "&" + preamble;
}
private boolean isValidEntity(final String entity) {
return inArray(entity, vAllowedEntities);
}
private static boolean inArray(final String s, final String[] array) {
for (String item : array) {
if (item != null && item.equals(s)) {
return true;
}
}
return false;
}
private boolean allowed(final String name) {
return (vAllowed.isEmpty() || vAllowed.containsKey(name)) && !inArray(name, vDisallowed);
}
private boolean allowedAttribute(final String name, final String paramName) {
return allowed(name) && (vAllowed.isEmpty() || vAllowed.get(name).contains(paramName));
}
}
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
* XSS过滤
*
*/
public class XssFilter implements Filter {
@Override
public void init(FilterConfig config) throws ServletException {
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
XssHttpServletRequestWrapper xssRequest = new XssHttpServletRequestWrapper((HttpServletRequest) request);
chain.doFilter(xssRequest, response);
}
@Override
public void destroy() {
}
}
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.http.MediaType;
/**
* XSS过滤处置惩罚
给各人的福利
零底子入门
对于从来没有打仗过网络安全的同学，我们帮你预备了详细的学习成长路线图。可以说是最科学最体系的学习路线，各人跟着这个大的方向学习准没问题。
https://img-blog.csdnimg.cn/img_convert/95608e9062782d28f4f04f821405d99a.png
同时每个成长路线对应的板块都有配套的视频提供：
https://img-blog.csdnimg.cn/direct/a91b9e8100834e9291cfcf1695d8cd42.png#pic_center
因篇幅有限，仅展示部分资料
网上学习资料一大堆，但假如学到的知识不成体系，遇到问题时只是浅尝辄止，不再深入研究，那么很难做到真正的技能提升。
必要这份体系化资料的朋侪，可以点击这里获取
一个人可以走的很快，但一群人才气走的更远！岂论你是正从事IT行业的老鸟或是对IT行业感爱好的新人，都欢迎加入我们的的圈子（技能交换、学习资源、职场吐槽、大厂内推、面试辅导），让我们一起学习成长！
免责声明：如果侵犯了您的权益，请联系站长，我们会及时删除侵权内容，谢谢合作！更多信息从访问主页：qidao123.com:ToB企服之家，中国第一个企服评测及商务社交产业平台。
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