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// ´Ó HTTP Í·ÖÐÈ¡µÃ Referer Öµ 2 String referer=request.getHeader("Referer"); 3 // ÅÐ¶Ï Referer ÊÇ·ñÒÔ bank.example ¿ªÍ· 4 if((referer!=null) &&(referer.trim().startsWith(¡°bank.example¡±))){ 5 chain.doFilter(request, response); 6 }else{ 7 request.getRequestDispatcher(¡°error.jsp¡±).forward(request,response); 8 } |
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HttpServletRequest req = (HttpServletRequest)request; 2 HttpSession s = req.getSession(); 3 4 // ´Ó session Öеõ½ csrftoken ÊôÐÔ 5 String sToken = (String)s.getAttribute(¡°csrftoken¡±); 6 if(sToken == null){ 7 8 // ²úÉúÐ嵀 token ·ÅÈë session ÖÐ 9 sToken = generateToken(); 10 s.setAttribute(¡°csrftoken¡±,sToken); 11 chain.doFilter(request, response); 12 } else{ 13 14 // ´Ó HTTP Í·ÖÐÈ¡µÃ csrftoken 15 String xhrToken = req.getHeader(¡°csrftoken¡±); 16 17 // ´ÓÇëÇó²ÎÊýÖÐÈ¡µÃ csrftoken 18 String pToken = req.getParameter(¡°csrftoken¡±); 19 if(sToken != null && xhrToken != null && sToken.equals(xhrToken)){ 20 chain.doFilter(request, response); 21 }else if(sToken != null && pToken != null && sToken.equals(pToken)){ 22 chain.doFilter(request, response); 23 }else{ 24 request.getRequestDispatcher(¡°error.jsp¡±).forward(request,response); 25 } 26 } |
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function appendToken(){ 2 updateForms(); 3 updateTags(); 4 } 5 6 function updateForms() { 7 // µÃµ½Ò³ÃæÖÐËùÓÐµÄ form ÔªËØ 8 var forms = document.getElementsByTagName('form'); 9 for(i=0; i<forms.length; i++) { 10 var url = forms[i].action; 11 12 // Èç¹ûÕâ¸ö form µÄ action ֵΪ¿Õ£¬Ôò²»¸½¼Ó csrftoken 13 if(url == null || url == "" ) continue; 14 15 // ¶¯Ì¬Éú³É input ÔªËØ£¬¼ÓÈëµ½ form Ö®ºó 16 var e = document.createElement("input"); 17 e.name = "csrftoken"; 18 e.value = token; 19 e.type="hidden"; 20 forms[i].appendChild(e); 21 } 22 } 23 24 function updateTags() { 25 var all = document.getElementsByTagName('a'); 26 var len = all.length; 27 28 // ±éÀúËùÓÐ a ÔªËØ 29 for(var i=0; i<len; i++) { 30 var e = all[i]; 31 updateTag(e, 'href', token); 32 } 33 } 34 35 function updateTag(element, attr, token) { 36 var location = element.getAttribute(attr); 37 if(location != null && location != '' '' ) { 38 var fragmentIndex = location.indexOf('#'); 39 var fragment = null; 40 if(fragmentIndex != -1){ 41 42 //url Öк¬ÓÐÖ»Ï൱ҳµÄê±ê¼Ç 43 fragment = location.substring(fragmentIndex); 44 location = location.substring(0,fragmentIndex); 45 } 46 47 var index = location.indexOf('?'); 48 49 if(index != -1) { 50 //url ÖÐÒѺ¬ÓÐÆäËû²ÎÊý 51 location = location + '&csrftoken=' + token; 52 } else { 53 //url ÖÐûÓÐÆäËû²ÎÊý 54 location = location + '?csrftoken=' + token; 55 } 56 if(fragment != null){ 57 location += fragment; 58 } 59 60 element.setAttribute(attr, location); 61 } 62 } |
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