发布时间:2018-10-27作者:laosun阅读(3851)
solr是基于 lucence开发的应用,如果query中带有非法字符串,结果很可能是检索出所有内容或者直接报错,所以你对用户的输入必须要先做处理。输入星号,能够检索出所有内容;输入加号,则会报错。
最近博主在处理solr的时候,偶然发现了一个问题。就是特殊符号的搜索会抛出异常。
异常信息如下:
[ERROR][2018-10-27 14:11:46146]Error from server at XXXXXXXXXXXX: org.apache.solr.search.SyntaxError: Cannot parse 'title:http:sunjs.com OR digest:http:sunjs.com': Encountered " ":" ": "" at line 1, column 10. Was expecting one of: <EOF> <AND> ... <OR> ... <NOT> ... "+" ... "-" ... <BAREOPER> ... "(" ... "*" ... "^" ... <QUOTED> ... <TERM> ... <FUZZY_SLOP> ... <PREFIXTERM> ... <WILDTERM> ... <REGEXPTERM> ... "[" ... "{" ... <LPARAMS> ... "filter(" ... <NUMBER> ...
这种异常就是特殊符号所引起的,我们需要对齐进行转义处理
官方的处理办法:
public static String escapeQueryChars(String s) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < s.length(); i++) { char c = s.charAt(i); // These characters are part of the query syntax and must be escaped if (c == '\\' || c == '+' || c == '-' || c == '!' || c == '(' || c == ')' || c == ':' || c == '^' || c == '[' || c == ']' || c == '\"' || c == '{' || c == '}' || c == '~' || c == '*' || c == '?' || c == '|' || c == '&' || c == ';' || c == '/' || Character.isWhitespace(c)) { sb.append('\\'); } sb.append(c); } return sb.toString(); }
翻译的php版本(利用preg_replace函数进行正则替换):
static public function escape($value) { //list taken from http://lucene.apache.org/java/docs/queryparsersyntax.html#Escaping%20Special%20Characters $pattern = '/(\+|-|&|\||!|\(|\)|\{|}|\[|]|\^|"|~|\*|\?|:|;|~|\/)/'; $replace = '\\\$1'; return preg_replace($pattern, $replace, $value); }
翻译后的python版本:
import re def escape_solr(word): return re.sub('(\\\|\+|-|&|\|\||!|\(|\)|\{|}|\[|]|\^|"|~|\*|\?|:|;|/|\~)','\\\1', word )
文章转载自:https://blog.csdn.net/wgw335363240/article/details/39889979
版权属于: 技术客
原文地址: https://www.sunjs.com/article/detail/5bc41ee90d7045c5ba503616474e95ca.html
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