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https://issues.apache.org/jira/browse/HTTPCLIENT-2266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17704041#comment-17704041
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Michael Osipov commented on HTTPCLIENT-2266:
--------------------------------------------
The input is unvalid because the URI you have provided is invalid. Shit in,
shit out. HttpClient expects valid input, otherwise the behavior is undefined.
Regarding URLEncoder: NEVER EVER use this class, this class is fraud. It does
not URL encode, it does form encoding.
> UTF-8 chars unsupported in query params
> ---------------------------------------
>
> Key: HTTPCLIENT-2266
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2266
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient (classic)
> Affects Versions: 5.2.1
> Reporter: Karl-Johan Karlberg
> Priority: Major
>
> Trying to upgrade from HttpClient 4.5.13 to HttpClient 5.2.1 we have ONE test
> failing in a scary way.
> The test spins up a httpserver and we use httpclient to do a simple query
> with "scary Swedish chars in the query".
> Here is the call that works with httpclient 4.5.x and fails with httpclient
> 5.2.1
> {code:java}
> try (CloseableHttpClient client = HttpClientBuilder.create().build()) {
> URI uri = new
> URI("http://localhost:4711/v1/discovery/services?serviceName=Fräs";);
> String s = client.execute(new HttpGet(uri), new
> HttpClientResponseHandler<String>() {
> @Override
> public String handleResponse(ClassicHttpResponse response) throws
> HttpException, IOException {
> return EntityUtils.toString(response.getEntity(), "UTF-8");
> }
> });
> System.out.println(s);
> } catch (IOException e) {
> throw new RuntimeException(e);
> } {code}
>
> This code results in printout of (and of cause http status 400):
> {code:java}
> <h1>Bad Message 400</h1><pre>reason: Bad Request</pre> {code}
> HttpClient 4.5 prints "whatever the server responded and whatever
> statuscode". If you give a dummy non existent path a 404 is retuned. But as
> soon as we switch back to 5.2.1 it responds 400 (without exception and the
> evil text "reason: Bad Request")
> Debugging though the inner workings of httpclient renders nothing out of the
> ordinary and if we URLEncode the "nasty" chars it works.
>
> I.e. it works when request uri is done like:
> {code:java}
> URI uri = new URI("http://localhost:9112/v1/discovery/services?"+
> URLEncoder.encode("Fräs", "UTF-8"));{code}
>
>
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