英文:
How to place a '/' in an incoming request in Spring
问题
External, unmodifiable service 使用 '___' 而不是 '/' 用于 URL 中的参数路径变量。所以 'http://localhost:9091/infra/Test/Test' 变成 'http://localhost:9091/infra/Test___Test'。
对于每个传入的请求，我需要确保任何可能的 '___' 在请求被处理之前都会转换成 '/' 而不改变映射。以下是我想出来的解决方案：
@Component
public class SlashFilter extends OncePerRequestFilter {
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
final HttpServletRequestWrapper wrapped = new HttpServletRequestWrapper(request) {
@Override
public String getServletPath() {
final String originalUrl = ((HttpServletRequest) getRequest()).getRequestURL().toString();
return originalUrl.replace("___", "/").replace("%20", " "); // 强调
}
};
filterChain.doFilter(wrapped, response);
}
@Override
protected boolean shouldNotFilter(HttpServletRequest request) {
return !request.getPathInfo().contains("___");
}
}
然而，这似乎没有起到作用。如果我收到 http://localhost:9091/infra/Test___Test，它会变成 http://localhost:9091/infra/Test/Test，并且我会收到一个错误：
DELETE /infra/Test___Test http: 500 INTERNAL_SERVER_ERROR {"status":500,"error":"Internal Server Error","message":"Invalid contextPath: 'http://localhost:9091/infra/Test/Test': must start with '/' and not end with '/'","path":"/infra/Test___Test"}
所以，我想让我们在这里对 '/' 进行编码！我将标记的行更改为：
return originalUrl.replace("___", "%2F").replace("%20", " ");
然而，这给我带来了以下错误：
DELETE /infra/Test___Test http: 500 INTERNAL_SERVER_ERROR {"status":500,"error":"Internal Server Error","message":"Invalid contextPath: 'http://localhost:9091/infra/Test%252FTest': must start with '/' and not end with '/'","path":"/infra/Test___Test"}
看起来它也转换了 '%'，'%2F' 变成了 '%252F'。我有点困惑了，已经整天在尝试这个和 RequestWrapper，但到目前为止什么都没用。有人有想法如何让它工作吗？
英文:
An external, unmodifiable service uses '___' instead of '/' for ~parameters~ path variables in URLs. So 'http://localhost:9091/infra/Test/Test' becomes 'http://localhost:9091/infra/Test___Test'.
For every incoming request, I need to make sure that any possible '___' gets converted into '/' without changing the mapping before the request is processed. This is what I came up with:
@Component
public class SlashFilter extends OncePerRequestFilter {
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
final HttpServletRequestWrapper wrapped = new HttpServletRequestWrapper(request) {
@Override
public String getServletPath() {
final String originalUrl = ((HttpServletRequest) getRequest()).getRequestURL().toString();
return originalUrl.replace("___", "/").replace("%20", " "); // emphasis
}
};
filterChain.doFilter(wrapped, response);
}
@Override
protected boolean shouldNotFilter(HttpServletRequest request) {
return !request.getPathInfo().contains("___");
}
}
However, this seems to effectively do nothing. If I receive http://localhost:9091/infra/Test___Test, it becomes http://localhost:9091/infra/Test/Test and I get an error:
DELETE /infra/Test___Test http: 500 INTERNAL_SERVER_ERROR {"status":500,"error":"Internal Server Error","message":"Invalid contextPath: 'http://localhost:9091/infra/Test/Test': must start with '/' and not end with '/'","path":"/infra/Test___Test"}
So, I thought let's encode the / here! I changed the marked line to:
return originalUrl.replace("___", "%2F").replace("%20", " ");
However, this gave me the following error:
DELETE /infra/Test___Test http: 500 INTERNAL_SERVER_ERROR {"status":500,"error":"Internal Server Error","message":"Invalid contextPath: 'http://localhost:9091/infra/Test%252FTest': must start with '/' and not end with '/'","path":"/infra/Test___Test"}
It looks like it converts the % as well, and '%2F' becomes '%252F'. I'm kinda getting lost here, have spent all day fiddling with this and the RequestWrapper, but so far nothing works. Anyone got an idea how to make it work?
答案1
得分: 0
In the end, I realized that there was no real use for using path variables and we changed to request parameters. That was a lot easier than hardcoding some filter.
英文:
In the end, I realized that there was no real use for using path variables and we changed to request parameters. That was a lot easier than hardcoding some filter
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