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https://issues.apache.org/jira/browse/HTTPCLIENT-2360?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hiran Chaudhuri updated HTTPCLIENT-2360:
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    Attachment: TestHttpClient.zip

> rfc6266 support in MIME multipart
> ---------------------------------
>
>                 Key: HTTPCLIENT-2360
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2360
>             Project: HttpComponents HttpClient
>          Issue Type: Improvement
>          Components: HttpClient (classic)
>    Affects Versions: 5.4.1
>            Reporter: Hiran Chaudhuri
>            Priority: Minor
>              Labels: volunteers-wanted
>             Fix For: Stuck
>
>         Attachments: TestHttpClient.zip
>
>
> The following code creates a bad HTTP request:
>  
> {code:java}
> File file = ...
> FileBody fileBody = new FileBody(sourceFile);
> MultipartEntityBuilder builder = MultipartEntityBuilder.create();
> builder.setMode(HttpMultipartMode.LEGACY);
> builder.addPart("document", fileBody);
> HttpEntity requestEntity = builder.build();
> URI endpoint = ...
> HttpPost httpPost = new HttpPost(endpoint.toString());
> httpPost.setEntity(requestEntity);
> httpClient.execute(httpPost, getHttpClientContext(), ...); {code}
> The request contains the file and a {{Content-Disposition}} header. Inside 
> this header the filename is contained. So far so good.
>  
> But as filesystems go international and support all kinds of characters, the 
> {{filename}} header needs to be encoded in ISO-8859-1 or rfc5987 applies. But 
> in reality HttpClient 5.4.1 uses UTF-8 encoding, which can break other 
> servers trying to parse the request.
> I like to use this client a lot. Please enhance it to follow 
> https://www.rfc-editor.org/rfc/rfc6266#page-5  which allows to use UTF-8 
> encoding in the {{filename*}} header. Or even better, HttpClient fills both 
> headers so the server can pick.



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