我有一个搜索框,用户可以搜索任何字符串,包括单引号和双引号,一旦搜索到,后端将关键字传回给我,所以我可以把它放回到框中。我不知道字符串是什么,所以我自己无法逃避引用,下面是一个例子:
var keyword = "hello";
$("#selectionkeywords").val();
我遇到的问题是,如果用户输入“hello”,关键字变为“”hello“”,我收到此错误:
missing ) after argument list
[Break On This Error]
jQuery("#selectionkeywords").val(""hello"");
用户也可以输入单引号,以便将其排除在外。我尝试使用转义unescape但我仍然有同样的问题,例如逃生(“”你好“”) 我可以用非转义格式获取值,例如“你好”,但我不知道该怎么办,逃避不起作用我最终得到这个%26%23034%3Bhello%26%23034%3B
所以我现在几乎陷入困境,因为我无法对字符串,任何想法做任何事情?
答案 0 :(得分:3)
你必须逃避字符串服务器端,所以javascript接收它已经被转义,在PHP的情况下你可以这样做:
$var = str_replace('"', '\"', $var);
然后在javascript中确保您在双引号之间读取它,因为您为此进行了转义:
//use double quotes, as you escaped for them
jQuery("#selectionkeywords").val("<?php echo $var ?>");
答案 1 :(得分:1)
当你从服务器到客户端交换数据时,你想要使用base64编码和解码,以避免这种和其他类型的问题。
Java方面:
import javax.xml.bind.DatatypeConverter;
/* ... */
/* Decode input from client */
String input = DatatypeConverter.printBase64Binary(inputFromClient);
/* Encode output for client */
String output = DatatypeConverter.printBase64Binary(encodedOutput);
Javascript方面:
// Encode data for the server
var dataForServer = Base64.encode(data);
// Decode data coming from the server
var data = Base64.decode(dataFromServer);
使用此课程
var Base64 = {
// private property
_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
// public method for encoding
encode : function (input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = Base64._utf8_encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
}
return output;
},
// public method for decoding
decode : function (input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = this._keyStr.indexOf(input.charAt(i++));
enc2 = this._keyStr.indexOf(input.charAt(i++));
enc3 = this._keyStr.indexOf(input.charAt(i++));
enc4 = this._keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
}
output = Base64._utf8_decode(output);
return output;
},
// private method for UTF-8 encoding
_utf8_encode : function (string) {
string = string.replace(/\r\n/g,"\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
},
// private method for UTF-8 decoding
_utf8_decode : function (utftext) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while ( i < utftext.length ) {
c = utftext.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
}
else if((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
}
else {
c2 = utftext.charCodeAt(i+1);
c3 = utftext.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
}