英文:
Pass a Regular Expression via URL
问题
我有一个类似这样的资源端点：'.../rest/regex/{regex:.+}/matches{value:.+}';
我如何安全地将正则表达式传递到URL？我该如何对其进行编码？
在 JavaScript 中，我尝试这样做：
public matches(regex: string, value: string): ng.IPromise<boolean> {return this.RestService.httpGet(this.path + this.escapeRegExp(regex) +'/matches/' + encodeURIComponent(value));}escapeRegExp(str: string) {return str.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\$&');}
但是，当我使用这个正则表达式：TNGSXGIN02BZ0(1|3)[1][8-9][0-5][0-9]\d{4} 时，在服务器端（Java）我会得到这个错误：
java.util.regex.PatternSyntaxException: Unclosed counted closure near index 60 (?i)^TNGSXGIN02BZ0/(1/|3/)/[1/]/[8/-9/]/[0/-5/]/[0/-9/]/d/{4/}$
Java 代码如下：
@Path("regex")@RunInTransaction@Produces(MediaType.TEXT_PLAIN)public final class RegexService {private static final Logger LOG = Log.getLogger();@GET@Path("{regex:.+}/matches/{value:.+}")public boolean matches(@PathParam("regex") String regex, @PathParam("value") String value) {LOG.debug("GET Test regex: {} with value: {}", regex, value);return Pattern.matches("(?i)^" + regex + "$", value);}}
更新：
当我在 JavaScript 中这样写：
public matches(regex: string, value: string): ng.IPromise<boolean> {return this.RestService.httpGet(this.path + encodeURIComponent(regex) +'/matches/' + encodeURIComponent(value));}
以及在 Java 中这样写：
@GET@Path("{regex:.+}/matches/{value:.+}")public boolean matches(@PathParam("regex") String regex, @PathParam("value") String value) {LOG.debug("GET Test regex: {} with value: {}", URLDecoder.decode(regex, StandardCharsets.UTF_8), value);return Pattern.matches("(?i)^" + URLDecoder.decode(regex, StandardCharsets.UTF_8) + "$", value);}
我仍然会得到一个异常：
(?i)^TNGSXGIN02BZ0/(1/|3/)/[1/]/[8/-9/]/[0/-5/]/[0/-9/]/d/{4/}$```<details><summary>英文:</summary>I have resource endpoint like this: '.../rest/regex/{regex:.+}/matches{value:.+}';How can i safely pass the regex in the url? How do I encode it?In javascript I tried to do:```javascriptpublic matches(regex: string, value: string): ng.IPromise<boolean> {return this.RestService.httpGet(this.path + this.escapeRegExp(regex) +'/matches/' + encodeURIComponent(value));}escapeRegExp(str: string) {return str.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\$&');}
But when I use this regex: TNGSXGIN02BZ0(1|3)[1][8-9][0-5][0-9]\d{4} then server-side (java) i get this error:
java.util.regex.PatternSyntaxException: Unclosed counted closure near index 60
(?i)^TNGSXGIN02BZ0/(1/|3/)/[1/]/[8/-9/]/[0/-5/]/[0/-9/]/d/{4/}$
Java code looks like this:
@Path("regex")@RunInTransaction@Produces(MediaType.TEXT_PLAIN)public final class RegexService {private static final Logger LOG = Log.getLogger();@GET@Path("{regex:.+}/matches/{value:.+}")public boolean matches(@PathParam("regex") String regex, @PathParam("value") String value) {LOG.debug("GET Test regex: {} with value: {}", regex, value);return Pattern.matches("(?i)^" + regex + "$", value);}}
UPDATE:
When i have this in javascript:
public matches(regex: string, value: string): ng.IPromise<boolean> {return this.RestService.httpGet(this.path + encodeURIComponent(regex) +'/matches/' + encodeURIComponent(value));}
And this in Java:
@GET@Path("{regex:.+}/matches/{value:.+}")public boolean matches(@PathParam("regex") String regex, @PathParam("value") String value) {LOG.debug("GET Test regex: {} with value: {}", URLDecoder.decode(regex, StandardCharsets.UTF_8), value);return Pattern.matches("(?i)^" + URLDecoder.decode(regex, StandardCharsets.UTF_8) + "$", value);}
I still get an exception:
>java.util.regex.PatternSyntaxException: Unclosed counted closure near index 60
(?i)^TNGSXGIN02BZ0/(1/|3/)/[1/]/[8/-9/]/[0/-5/]/[0/-9/]/d/{4/}$
答案1
得分: 2
你需要对你的正则表达式进行 URL 编码和解码。
对于 JavaScript 编码：https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
对于 Java 中的解码：https://docs.oracle.com/javase/7/docs/api/java/net/URLDecoder.html
英文:
You need to URL encode & decode your regex.
For Javascript encoding: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
For decoding in Java: https://docs.oracle.com/javase/7/docs/api/java/net/URLDecoder.html
答案2
得分: -1
可以还使用 String 构造函数：
let regex = new RegExp(".*", "g");let urlRegex = encodeURIComponent(String(regex));console.log(urlRegex);let regexresult = new RegExp(decodeURIComponent(urlRegex));console.log(decodeURIComponent(urlRegex));
英文:
You can also make use of the String constructor:
let regex = new RegExp(".*", "g");let urlRegex = encodeURIComponent(String(regex));console.log(urlRegex);let regexresult = new RegExp(decodeURIComponent(urlRegex));console.log(decodeURIComponent(urlRegex));
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