Using nuget.exe via mono on Mac OS X Yosemite (10.10.3) appears to produce an HTTP PUT request that is missing a carriage-return (CR) just before the final multipart boundary.
mono installed via brew
mono: stable 4.0.1.44 (bottled)
nuget.exe version
NuGet Version: 2.8.60318.667
the following push command
mono nuget.exe push SimplePackage.1.0.0.nupkg -source nuget-hosted
Produces the following multipart content which was captured via Charles
PUT /repository/nuget-hosted/ HTTP/1.0
User-Agent: NuGet Command Line/2.8.60318.667 (Unix 14.3.0.0)
X-NuGet-ApiKey: 79982994-af3c-3bb8-a74f-17e1df492a89
Content-Type: multipart/form-data; boundary=---------------------------8d273112e43fb92
Content-Length: 2371
Host: 127.0.0.1:8081
00000000 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d ----------------
00000010 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 38 64 32 -------------8d2
00000020 37 33 31 31 32 65 34 33 66 62 39 32 0d 0a 43 6f 73112e43fb92 Co
00000030 6e 74 65 6e 74 2d 44 69 73 70 6f 73 69 74 69 6f ntent-Dispositio
00000040 6e 3a 20 66 6f 72 6d 2d 64 61 74 61 3b 20 6e 61 n: form-data; na
00000050 6d 65 3d 22 70 61 63 6b 61 67 65 22 3b 20 66 69 me="package"; fi
00000060 6c 65 6e 61 6d 65 3d 22 70 61 63 6b 61 67 65 22 lename="package"
00000070 0d 0a 43 6f 6e 74 65 6e 74 2d 54 79 70 65 3a 20 Content-Type:
00000080 61 70 70 6c 69 63 61 74 69 6f 6e 2f 6f 63 74 65 application/octe
00000090 74 2d 73 74 72 65 61 6d 0d 0a 0d 0a 50 4b 03 04 t-stream PK
000000a0 14 00 00 00 00 00 ee 40 19 50 33 29 50 0a a6 01 @ P3)P
000000b0 00 00 a6 01 00 00 0b 00 00 00 5f 72 65 6c 73 2f _rels/
000000c0 2e 72 65 6c 73 ef bb bf 3c 3f 78 6d 6c 20 76 65 .rels <?xml ve
000000d0 72 73 69 6f 6e 3d 22 31 2e 30 22 3f 3e 3c 52 65 rsion="1.0"?><Re
000000e0 6c 61 74 69 6f 6e 73 68 69 70 73 20 78 6d 6c 6e lationships xmln
000000f0 73 3d 22 68 74 74 70 3a 2f 2f 73 63 68 65 6d 61 s="http://schema
00000100 73 2e 6f 70 65 6e 78 6d 6c 66 6f 72 6d 61 74 73 s.openxmlformats
00000110 2e 6f 72 67 2f 70 61 63 6b 61 67 65 2f 32 30 30 .org/package/200
00000120 36 2f 72 65 6c 61 74 69 6f 6e 73 68 69 70 73 22 6/relationships"
00000130 3e 3c 52 65 6c 61 74 69 6f 6e 73 68 69 70 20 49 ><Relationship I
00000140 64 3d 22 52 65 30 22 20 54 61 72 67 65 74 3d 22 d="Re0" Target="
00000150 2f 53 69 6d 70 6c 65 50 61 63 6b 61 67 65 2e 6e /SimplePackage.n
00000160 75 73 70 65 63 22 20 54 79 70 65 3d 22 68 74 74 uspec" Type="htt
00000170 70 3a 2f 2f 73 63 68 65 6d 61 73 2e 6d 69 63 72 p://schemas.micr
00000180 6f 73 6f 66 74 2e 63 6f 6d 2f 70 61 63 6b 61 67 osoft.com/packag
00000190 69 6e 67 2f 32 30 31 30 2f 30 37 2f 6d 61 6e 69 ing/2010/07/mani
000001a0 66 65 73 74 22 20 2f 3e 3c 52 65 6c 61 74 69 6f fest" /><Relatio
000001b0 6e 73 68 69 70 20 49 64 3d 22 52 65 31 22 20 54 nship Id="Re1" T
000001c0 61 72 67 65 74 3d 22 2f 70 61 63 6b 61 67 65 2f arget="/package/
000001d0 73 65 72 76 69 63 65 73 2f 6d 65 74 61 64 61 74 services/metadat
000001e0 61 2f 63 6f 72 65 2d 70 72 6f 70 65 72 74 69 65 a/core-propertie
000001f0 73 2f 31 2e 70 73 6d 64 63 70 22 20 54 79 70 65 s/1.psmdcp" Type
00000200 3d 22 68 74 74 70 3a 2f 2f 73 63 68 65 6d 61 73 ="http://schemas
00000210 2e 6f 70 65 6e 78 6d 6c 66 6f 72 6d 61 74 73 2e .openxmlformats.
00000220 6f 72 67 2f 70 61 63 6b 61 67 65 2f 32 30 30 36 org/package/2006
00000230 2f 72 65 6c 61 74 69 6f 6e 73 68 69 70 73 2f 6d /relationships/m
00000240 65 74 61 64 61 74 61 2f 63 6f 72 65 2d 70 72 6f etadata/core-pro
00000250 70 65 72 74 69 65 73 22 20 2f 3e 3c 2f 52 65 6c perties" /></Rel
00000260 61 74 69 6f 6e 73 68 69 70 73 3e 50 4b 03 04 14 ationships>PK
00000270 00 02 00 08 00 1e 43 19 50 3a 26 b1 df a6 01 00 C P:&
00000280 00 53 03 00 00 14 00 00 00 53 69 6d 70 6c 65 50 S SimpleP
00000290 61 63 6b 61 67 65 2e 6e 75 73 70 65 63 85 53 c1 ackage.nuspec S
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00000350 c1 71 f9 00 e2 89 e0 09 49 bc fd 65 e0 03 3d 02 q I e =
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00000370 aa fb 7d 51 dd b2 3d ab 76 fb ea 86 15 ec c0 aa }Q = v
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000003b0 a0 48 03 7e 17 02 ba c0 8d 00 7a e4 ad 8f 5b fd H ~ z [
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000003d0 e7 82 e9 c4 16 b8 87 ad 0d e0 69 d9 6b cd dd 09 i k
000003e0 d9 23 12 0d 37 35 78 a4 b9 04 a4 0c 0a 8d f2 68 # 75x h
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00000440 03 fd 07 50 4b 03 04 14 00 00 00 00 00 b2 45 19 PK E
00000450 50 a1 9f 60 dd 5f 02 00 00 5f 02 00 00 32 00 00 P ` _ _ 2
00000460 00 70 61 63 6b 61 67 65 2f 73 65 72 76 69 63 65 package/service
00000470 73 2f 6d 65 74 61 64 61 74 61 2f 63 6f 72 65 2d s/metadata/core-
00000480 70 72 6f 70 65 72 74 69 65 73 2f 31 2e 70 73 6d properties/1.psm
00000490 64 63 70 ef bb bf 3c 3f 78 6d 6c 20 76 65 72 73 dcp <?xml vers
000004a0 69 6f 6e 3d 22 31 2e 30 22 20 65 6e 63 6f 64 69 ion="1.0" encodi
000004b0 6e 67 3d 22 55 54 46 2d 38 22 3f 3e 3c 63 6f 72 ng="UTF-8"?><cor
000004c0 65 50 72 6f 70 65 72 74 69 65 73 20 78 6d 6c 6e eProperties xmln
000004d0 73 3a 64 63 3d 22 68 74 74 70 3a 2f 2f 70 75 72 s:dc="http://pur
000004e0 6c 2e 6f 72 67 2f 64 63 2f 65 6c 65 6d 65 6e 74 l.org/dc/element
000004f0 73 2f 31 2e 31 2f 22 20 78 6d 6c 6e 73 3a 64 63 s/1.1/" xmlns:dc
00000500 74 65 72 6d 73 3d 22 68 74 74 70 3a 2f 2f 70 75 terms="http://pu
00000510 72 6c 2e 6f 72 67 2f 64 63 2f 74 65 72 6d 73 2f rl.org/dc/terms/
00000520 22 20 78 6d 6c 6e 73 3a 78 73 69 3d 22 68 74 74 " xmlns:xsi="htt
00000530 70 3a 2f 2f 77 77 77 2e 77 33 2e 6f 72 67 2f 32 p://www.w3.org/2
00000540 30 30 31 2f 58 4d 4c 53 63 68 65 6d 61 2d 69 6e 001/XMLSchema-in
00000550 73 74 61 6e 63 65 22 20 78 6d 6c 6e 73 3d 22 68 stance" xmlns="h
00000560 74 74 70 3a 2f 2f 73 63 68 65 6d 61 73 2e 6f 70 ttp://schemas.op
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00000580 2f 70 61 63 6b 61 67 65 2f 32 30 30 36 2f 6d 65 /package/2006/me
00000590 74 61 64 61 74 61 2f 63 6f 72 65 2d 70 72 6f 70 tadata/core-prop
000005a0 65 72 74 69 65 73 22 3e 3c 64 63 3a 63 72 65 61 erties"><dc:crea
000005b0 74 6f 72 3e 62 72 61 64 62 65 63 6b 3c 2f 64 63 tor>bradbeck</dc
000005c0 3a 63 72 65 61 74 6f 72 3e 3c 64 63 3a 64 65 73 :creator><dc:des
000005d0 63 72 69 70 74 69 6f 6e 3e 50 61 63 6b 61 67 65 cription>Package
000005e0 20 64 65 73 63 72 69 70 74 69 6f 6e 3c 2f 64 63 description</dc
000005f0 3a 64 65 73 63 72 69 70 74 69 6f 6e 3e 3c 64 63 :description><dc
00000600 3a 69 64 65 6e 74 69 66 69 65 72 3e 53 69 6d 70 :identifier>Simp
00000610 6c 65 50 61 63 6b 61 67 65 3c 2f 64 63 3a 69 64 lePackage</dc:id
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000006e0 3e 3c 2f 63 6f 72 65 50 72 6f 70 65 72 74 69 65 ></corePropertie
000006f0 73 3e 50 4b 03 04 14 00 02 00 08 00 fc 46 19 50 s>PK F P
00000700 c1 13 c7 c6 bf 00 00 00 74 01 00 00 13 00 00 00 t
00000710 5b 43 6f 6e 74 65 6e 74 5f 54 79 70 65 73 5d 2e [Content_Types].
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000007f0 19 50 33 29 50 0a a6 01 00 00 a6 01 00 00 0b 00 P3)P
00000800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000810 5f 72 65 6c 73 2f 2e 72 65 6c 73 50 4b 01 02 00 _rels/.relsPK
00000820 00 14 00 02 00 08 00 1e 43 19 50 3a 26 b1 df a6 C P:&
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00000840 00 00 00 00 00 cf 01 00 00 53 69 6d 70 6c 65 50 SimpleP
00000850 61 63 6b 61 67 65 2e 6e 75 73 70 65 63 50 4b 01 ackage.nuspecPK
00000860 02 00 00 14 00 00 00 00 00 b2 45 19 50 a1 9f 60 E P `
00000870 dd 5f 02 00 00 5f 02 00 00 32 00 00 00 00 00 00 _ _ 2
00000880 00 01 00 00 00 00 00 a7 03 00 00 70 61 63 6b 61 packa
00000890 67 65 2f 73 65 72 76 69 63 65 73 2f 6d 65 74 61 ge/services/meta
000008a0 64 61 74 61 2f 63 6f 72 65 2d 70 72 6f 70 65 72 data/core-proper
000008b0 74 69 65 73 2f 31 2e 70 73 6d 64 63 70 50 4b 01 ties/1.psmdcpPK
000008c0 02 00 00 14 00 02 00 08 00 fc 46 19 50 c1 13 c7 F P
000008d0 c6 bf 00 00 00 74 01 00 00 13 00 00 00 00 00 00 t
000008e0 00 01 00 00 00 00 00 56 06 00 00 5b 43 6f 6e 74 V [Cont
000008f0 65 6e 74 5f 54 79 70 65 73 5d 2e 78 6d 6c 50 4b ent_Types].xmlPK
00000900 05 06 00 00 00 00 04 00 04 00 1c 01 00 00 46 07 F
00000910 00 00 00 00 0a 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d -----------
00000920 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d ----------------
00000930 2d 2d 38 64 32 37 33 31 31 32 65 34 33 66 62 39 --8d273112e43fb9
00000940 32 2d 2d 2--
In the row 00000910, I believe the multipart content-type specification (http://www.w3.org/Protocols/rfc1341/7_2_Multipart.html) requires a carriage-return (Ox0d) and a line-feed (0x0a) prior to the final boundary which, in this case, starts with - (0x2d). But this row contains 00 0a 2d, which is missing the CR (0d).
The current implementation of MultipartWebRequest::CreateMultipartRequest doesn't appear to ensure that there is a CRLF before the closing boundary. It uses Environment.NewLine, which on Unix via mono, I believe will be just LF and not CRLF as on Windows.