Unable to put-attachment with a com.sun.mail.util.BASE64DecoderStream

[Murphy McMahon]

Hello Clutch users,

For a couple of days I have been fiddling with a simple SMTP server
that would store attachments it receives in CouchDB via Clutch. (I've
used Clojure and CouchDB for a little while but am relatively new to
SMTP and the javax.mail.* lib.)

For simplicity's and memory footprint's sake, I would like to handle
and insert the multipart attachments as InputStreams, without any
intermediate file-saving.

I noticed that javax.mail.internet.MimeBodyPart instances representing
individual parts/attachments provide a different class as a result of
their .getInputStream() method, apparently depending on whether the
attachment is plain text or binary in nature
(javax.mail.util.SharedByteArrayInputStream or
com.sun.mail.util.BASE64DecoderStream, respectively). In the former
case, calls to clutch/put-attachment go off without a hitch.

In the latter case, however, the REPL just appears to freeze, and
after an extended period there is a timeout and I get the following
exception/stacktrace:

org.apache.http.NoHttpResponseException: The target server failed to respond
at org.apache.http.impl.conn.DefaultResponseParser.parseHead
(DefaultResponseParser.java:101)
org.apache.http.impl.io.AbstractMessageParser.parse
(AbstractMessageParser.java:252)
org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader
(AbstractHttpClientConnection.java:282)
org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader
(DefaultClientConnection.java:247)
org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader
(AbstractClientConnAdapter.java:216)
org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse
(HttpRequestExecutor.java:298)
org.apache.http.protocol.HttpRequestExecutor.execute
(HttpRequestExecutor.java:125)
org.apache.http.impl.client.DefaultRequestDirector.tryExecute
(DefaultRequestDirector.java:647)
org.apache.http.impl.client.DefaultRequestDirector.execute
(DefaultRequestDirector.java:464)
org.apache.http.impl.client.AbstractHttpClient.execute
(AbstractHttpClient.java:820)
org.apache.http.impl.client.AbstractHttpClient.execute
(AbstractHttpClient.java:754)
org.apache.http.impl.client.AbstractHttpClient.execute
(AbstractHttpClient.java:732)
clj_http.core$request.invoke (core.clj:238)
clojure.lang.Var.invoke (Var.java:415)
clj_http.client$wrap_query_params$fn__2054.invoke (client.clj:293)
clj_http.client$wrap_basic_auth$fn__2058.invoke (client.clj:306)
clj_http.client$wrap_oauth$fn__2062.invoke (client.clj:315)
clj_http.client$wrap_user_info$fn__2067.invoke (client.clj:325)
clj_http.client$wrap_url$fn__2097.invoke (client.clj:374)
clj_http.client$wrap_redirects$fn__2001.invoke (client.clj:106)
clj_http.client$wrap_decompression$fn__2006.invoke (client.clj:142)
clj_http.client$wrap_input_coercion$fn__2023.invoke (client.clj:234)
clj_http.client$wrap_output_coercion$fn__2012.invoke (client.clj:151)
clj_http.client$wrap_exceptions$fn__1991.invoke (client.clj:80)
clj_http.client$wrap_accept$fn__2036.invoke (client.clj:261)
clj_http.client$wrap_accept_encoding$fn__2041.invoke (client.clj:272)
clj_http.client$wrap_content_type$fn__2032.invoke (client.clj:253)
clj_http.client$wrap_form_params$fn__2077.invoke (client.clj:346)
clj_http.client$wrap_nested_params$fn__2094.invoke (client.clj:366)
clj_http.client$wrap_method$fn__2072.invoke (client.clj:331)
clj_http.cookies$wrap_cookies$fn__1744.invoke (cookies.clj:116)
clj_http.links$wrap_links$fn__1777.invoke (links.clj:50)
clj_http.client$wrap_unknown_host$fn__2102.invoke (client.clj:380)
com.ashafa.clutch.http_client$connect.invoke (http_client.clj:52)
com.ashafa.clutch.http_client$couchdb_request_STAR_.doInvoke
(http_client.clj:75)
clojure.lang.RestFn.applyTo (RestFn.java:142)
clojure.core$apply.invoke (core.clj:601)
com.ashafa.clutch.http_client$couchdb_request.doInvoke (http_client.clj:80)
clojure.lang.RestFn.invoke (RestFn.java:619)
com.ashafa.clutch$put_attachment.doInvoke (clutch.clj:358)

I am going to keep trying to debug this but I just thought I would ask
here in case anyone has faced this, or worked with javax.mail.* and
Clutch, and can point me in the right direction.

Thanks,
Murph