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Posted to dev@hc.apache.org by "Nels N. Nelson (JIRA)" <ji...@apache.org> on 2007/07/23 20:27:31 UTC
[jira] Commented: (HTTPCORE-104) Handler Registry Should Match
Using Regular Expressions
[ https://issues.apache.org/jira/browse/HTTPCORE-104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12514714 ]
Nels N. Nelson commented on HTTPCORE-104:
-----------------------------------------
Roland,
Thanks for your response. I see your points, and I agree with you. This has caused me to realign
May I ask, can you recommend any 1.3-compatible code for handling the query strings of plain old string literal uris? I do not see any existing code for such functionality in the httpcore codebase. I'm guessing I'll have to write my own, or co-opt some open source library, but I'd like to see if I can keep my current project as close to the requirements of the httpcore project requirements as possible.
-Nels
> Handler Registry Should Match Using Regular Expressions
> -------------------------------------------------------
>
> Key: HTTPCORE-104
> URL: https://issues.apache.org/jira/browse/HTTPCORE-104
> Project: HttpComponents Core
> Issue Type: Improvement
> Components: HttpCore
> Affects Versions: 4.0-alpha4, 4.0-alpha5, 4.0-alpha6, 4.0-beta1, 4.0-rc1
> Reporter: Nels N. Nelson
> Fix For: 4.0-alpha6
>
>
> Hello!
> In HttpRequestHandlerRegistry, the method matchUriRequestPattern(final String pattern, final String requestUri) uses what is, in my opinion, a poor strategy for pattern matching.
> This method is better and provides more flexibility to developers trying to add new Handlers:
> <code>
> protected boolean matchUriRequestPattern(final String pattern,
> final URI requestUri)
> {
> try {
> String path = requestUri.getPath();
> Pattern p = Pattern.compile(pattern);
> Matcher matcher = p.matcher(path);
> return matcher.matches();
> }
> catch (java.util.regex.PatternSyntaxException ex) {
> return false;
> }
> }
> </code>
> These changes would make this code far more accurate:
> <code>
> protected void doService(
> final HttpRequest request,
> final HttpResponse response,
> final HttpContext context) throws HttpException, IOException {
> HttpRequestHandler handler = null;
> if (this.handlerResolver != null) {
> URI requestURI = request.getRequestLine().getUri();
> handler = this.handlerResolver.lookup(requestURI);
> }
> if (handler != null) {
> handler.handle(request, response, context);
> } else {
> response.setStatusCode(HttpStatus.SC_NOT_IMPLEMENTED);
> }
> }
> </code>
> These changes would allow developers to add new custom handlers in this way:
> <code>
> String pattern = ".*\\.extension";
> HttpRequestHandler handler = new HttpServletHandler(...);
> HttpRequestHandlerRegistry reqistry = new HttpRequestHandlerRegistry();
> reqistry.register(pattern, handler);
> </code>
> Currently, my version of the HttpComponents core software uses <code>URI</code> to represent the <code>requestURI</code> parameter throughout the code. This has provided greater convenience, error handling (in the instantiation of the <code>BasicRequestLine</code> class, for instance), and flexibility of extension. I can enumerate the specifics on this, if necessary, but I believe that would be a discussion for a separate Jira Issue, which I will happily create, if I am convinced that its priority would be at least major, which currently, I am not. Such a change would cause several changes throughout multiple classes, stemming from changes to the <code>RequestLine</code> interface as follows:
> <code>
> public interface RequestLine {
> String getMethod();
> HttpVersion getHttpVersion();
> URI getUri();
>
> }
> </code>
> Thanks for your attention to this issue.
> -Nels
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