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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: Cannot transmit a SWA response with a large attachment (HttpEntity can't chunk multipart)
Date Mon, 05 Jun 2017 16:54:56 GMT
On Mon, 2017-06-05 at 16:46 +0000, Dan Wlodarski wrote:
> The source I ran was as provided in the updated Pastebin: 
> https://pastebin.com/2Hzdhpt3
> 
> How would I go about setting the content type of an HttpEntity
> instance? 

Something like that?

---
try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
    responseEntity.writeTo(out);
    response.setEntity(new ByteArrayEntity(out.toByteArray(), ContentType.get(responseEntity)));
}
---

Oleg

> The 
> interface doesn't include any mutators in its contract.
> 
> The getContentType() method of the HttpEntity instance built by 
> MultipartEntityBuilder does indeed return a string (ex. "Content-
> Type: 
> multipart/form-data; boundary=rfNtJUy3v1e0XsLoZmxsYhXSU8k9LohLG"),
> but the 
> Content-Type header doesn't get included in the response.
> 
> -----Original Message-----
> From: Oleg Kalnichevski [mailto:olegk@apache.org]
> Sent: Monday, June 5, 2017 10:58
> To: HttpClient User Discussion <httpclient-users@hc.apache.org>
> Subject: Re: Cannot transmit a SWA response with a large attachment 
> (HttpEntity can't chunk multipart)
> 
> On Mon, 2017-06-05 at 14:39 +0000, Dan Wlodarski wrote:
> > Running the sample server code on Netbeans v8.1 with SoapUI v5.3.0
> > as
> 
> ...
> 
> > 
> > 
> > Please note the missing Content-Type HTTP header.
> > 
> 
> Did you set a Content-Type header on the response entity?
> 
> Oleg
> 
> 
> > The Content-Type header is also missing from the response in my own
> > curl
> > v7.53.0 tests.
> > 
> > The additional testing and verification is appreciated.
> > 
> > -----Original Message-----
> > From: Oleg Kalnichevski [mailto:olegk@apache.org]
> > Sent: Monday, June 5, 2017 10:15
> > To: HttpClient User Discussion <httpclient-users@hc.apache.org>
> > Subject: Re: Cannot transmit a SWA response with a large attachment
> > (HttpEntity can't chunk multipart)
> > 
> > On Mon, 2017-06-05 at 14:07 +0000, Dan Wlodarski wrote:
> > > I've tried that solution previously. The result is a missing
> > > initial
> > > HTTP header. The transmission begins at the MIME multipart
> > > border.
> > > 
> > 
> > I see no evidence supporting this assertion.
> > 
> > Oleg
> > 
> > ---
> > oleg@ok2c:~$ curl -X POST http://localhost:8080/ -v
> > *   Trying ::1...
> > * TCP_NODELAY set
> > * Connected to localhost (::1) port 8080 (#0)
> > > POST / HTTP/1.1
> > > Host: localhost:8080
> > > User-Agent: curl/7.52.1
> > > Accept: */*
> > > 
> > 
> > < HTTP/1.1 200 OK
> > < Date: Mon, 05 Jun 2017 14:13:23 GMT
> > < Server: Test/1.1
> > < Content-Length: 678
> > < Content-Type: multipart/form-data;
> > boundary=PLjXq6xrj2ONaDdnyMPLBEnpkMqZA9Wmjw23
> > <
> > --PLjXq6xrj2ONaDdnyMPLBEnpkMqZA9Wmjw23
> > Content-Disposition: form-data; name="SOAP Envelope"
> > Content-Type: application/xml; charset=ISO-8859-1
> > Content-Transfer-Encoding: 8bit
> > 
> > <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/en
> > ve
> > lope/">;;
> >    <soapenv:Header/>
> >    <soapenv:Body>
> >       <AResponse>
> >          <ResponseFile>/home/oleg/blah.txt</ResponseFile>
> >       </AResponse>
> >    </soapenv:Body>
> > </soapenv:Envelope>
> > --PLjXq6xrj2ONaDdnyMPLBEnpkMqZA9Wmjw23
> > Content-Disposition: form-data; name="/home/oleg/blah.txt";
> > filename="blah.txt"
> > Content-Type: application/octet-stream
> > Content-Transfer-Encoding: binary
> > 
> > blah
> > 
> > --PLjXq6xrj2ONaDdnyMPLBEnpkMqZA9Wmjw23--
> > * Curl_http_done: called premature == 0
> > * Connection #0 to host localhost left intact
> > ---
> > 
> > > Pastebin source (https://pastebin.com/2Hzdhpt3) has been updated
> > > for
> > > further error replication.
> > > 
> > > -----Original Message-----
> > > From: Oleg Kalnichevski [mailto:olegk@apache.org]
> > > Sent: Monday, June 5, 2017 07:14
> > > To: HttpClient User Discussion <httpclient-users@hc.apache.org>
> > > Subject: Re: Cannot transmit a SWA response with a large
> > > attachment
> > > (HttpEntity can't chunk multipart)
> > > 
> > > On Sun, 2017-06-04 at 15:03 +0000, Dan Wlodarski wrote:
> > > > To whom it may concern:
> > > > 
> > > > Issue: HttpClient API does not support chunking multipart
> > > > HttpEntities.
> > > > Clients making SOAP requests to a mock SOAP with attachments
> > > > (SWA)
> > > > server are failing (specifically, Apache-based Java clients are
> > > > throwing
> > > > org.apache.http.NoHttpResponseExceptions) when the attachment
> > > > in
> > > > the
> > > > response is large (>2 MiB). Small attachments are transmitted
> > > > without throwing any exceptions. HTTP Content-Length header is
> > > > correct.
> > > > 
> > > > Use case: Multithreaded SOAP server capable of transmitting SWA
> > > > responses of arbitrary content length
> > > > 
> > > > Libraries: HttpCore v4.4.6 + HttpMime v4.5.3
> > > > 
> > > > Example server source for error replication is available at:
> > > > https://pastebin.com/2Hzdhpt3
> > > > 
> > > > Error replication:
> > > > 1. Build the above source with HttpCore v4.4.6 and HttpMime
> > > > v4.5.3
> > > > libraries (HttpMime is part of the HttpClient project).
> > > > 2. Run the program with a sufficiently large (>2 MiB) binary
> > > > file
> > > > named "random.png.gz" with correct pathing and permissions (a
> > > > readable directory sibling of the executable).
> > > > 3. Send the server an arbitrary HTTP POST request via some
> > > > third-
> > > > party client. Note the failure to receive the large server-
> > > > generated multipart result.
> > > > 
> > > > NB: SoapUI can be leveraged as an Apache-based Java client with
> > > > precision logging.
> > > > 
> > > > Please advise.
> > > > 
> > > 
> > > Dan,
> > > 
> > > You are mixing up non-blocking i/o transport and a blocking i/o
> > > entity
> > > implementation. This is generally a bad idea as it cannot be done
> > > efficiently without full or partial content buffering in memory.
> > > 
> > > If do not mind buffering the entire entity in memory, you can
> > > replace
> > > ---
> > > response.setEntity(responseEntity);
> > > ---
> > > 
> > > with
> > > 
> > > ---
> > > final ByteArrayOutputStream out = new ByteArrayOutputStream();
> > > responseEntity.writeTo(out); response.setEntity(new
> > > ByteArrayEntity(out.toByteArray()));
> > > ---
> > > 
> > > and your code will work just fine.
> > > 
> > > Oleg
> > > 
> > > 
> > > > Thanks,
> > > > 
> > > > Dan C. Wlodarski
> > > > The Design Knowledge Company
> > > > 3100 Presidential Drive
> > > > Suite 103
> > > > Fairborn, Ohio 45324
> > > > 
> > > > Phone: 937-427-4276 x175
> > > > Fax: 937-427-1242
> > > > dwlodarski@tdkc.com
> > > > www.tdkc.com
> > > > 
> > > > P.S. This issue was originally submitted on 30 May, but did not
> > > > appear in the archives. Assumed dropped.
> > > > 
> > > > 
> > > > -------------------------------------------------------------
> > > > ----
> > > > ----
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> > > > or
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> > > > For additional commands, e-mail: httpclient-users-help@hc.apach
> > > > e.
> > > > or
> > > > g
> > > > 
> > > 
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> > 
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