Multipart content based post failing if the file name contains space or () characters

For a file name ZAF (2).zip the code fails to upload it whereas if I remove the spaces and () from the file name it works.

**One difference I notice is that content length and content type are different just because the file name has spaces.**

> {"content-length", "92"},
> {"content-type", "application/json; charset=utf-8"},

Appreciate if you could look into this and let me know if any additional details needed.

Environment :

erlang 26.0.2
elixir 1.15.6-otp-26
{:httpoison, "~> 2.1"}

Error Case :

```
options = [connect_timeout: 3_600_000, recv_timeout: 3_600_000, timeout: 3_600_000]
path_to_file = "/Users/mpadmaos10/Downloads/ZAF\ \(2\).zip"
content = File.read!(path_to_file)
file_name = "ZAF (2).zip"
url = "http://localhost:52222/api/upsert_activity_attachment/user_id/mpadma/activity_id/450"
headers=[{"content-type", MIME.from_path(path_to_file)}]

HTTPoison.post(url, {:multipart,[{"attachment", content, {"form-data", [name: "attachment", filename: file_name]}, []}]}, headers, options)
```

Response :

```
{:ok,
%HTTPoison.Response{
status_code: 400,
body: "# Plug.Parsers.BadEncodingError at POST /api/upsert_activity_attachment/user_id/mpadma/acivity_id/450\n\nException:\n\n ** (Plug.Parsers.BadEncodingError) invalid UTF-8 on multipart body, got byte 205\n (plug 1.14.2) lib/plug/conn/utils.ex:292: Plug.Conn.Utils.do_validate_utf8!/3\n (plug 1.14.2) lib/plug/parsers/multipart.ex:206: Plug.Parsers.MULTIPART.parse_multipart_headers/5\n (plug 1.14.2) lib/plug/parsers/multipart.ex:186: Plug.Parsers.MULTIPART.parse_multipart/5\n (plug 1.14.2) lib/plug/parsers/multipart.ex:175: Plug.Parsers.MULTIPART.parse_multipart/2\n (plug 1.14.2) lib/plug/parsers/multipart.ex:127: Plug.Parsers.MULTIPART.parse/5\n (plug 1.14.2) lib/plug/parsers.ex:340: Plug.Parsers.reduce/8\n (dharma 1.0.0) lib/dharma_web/endpoint.ex:1: DharmaWeb.Endpoint.plug_builder_call/2\n (dharma 1.0.0) deps/plug/lib/plug/debugger.ex:136: DharmaWeb.Endpoint.\"call (overridable 3)\"/2\n (dharma 1.0.0) lib/dharma_web/endpoint.ex:1: DharmaWeb.Endpoint.call/2\n (phoenix 1.6.16) lib/phoenix/endpoint/cowboy2_handler.ex:54: Phoenix.Endpoint.Cowboy2Handler.init/4\n (cowboy 2.10.0) /Users/mpadmaos10/projects/source_code/dharma/deps/cowboy/src/cowboy_handler.erl:37: :cowboy_handler.execute/2\n (cowboy 2.10.0) /Users/mpadmaos10/projects/source_code/dharma/deps/cowboy/src/cowboy_stream_h.erl:306: :cowboy_stream_h.execute/3\n (cowboy 2.10.0) /Users/mpadmaos10/projects/source_code/dharma/deps/cowboy/src/cowboy_stream_h.erl:295: :cowboy_stream_h.request_process/3\n (stdlib 5.0.2) proc_lib.erl:241: :proc_lib.init_p_do_apply/3\n \n\nCode:\n\n`lib/plug/conn/utils.ex`\n\n 287 defp do_validate_utf8!(<<_::utf8, rest::bits>>, exception, context) do\n 288 do_validate_utf8!(rest, exception, context)\n 289 end\n 290 \n 291 defp do_validate_utf8!(<<byte, _::bits>>, exception, context) do\n 292> raise exception, "invalid UTF-8 on \#{context}, got byte \#{byte}"\n 293 end\n 294 \n 295 defp do_validate_utf8!(<<>>, _exception, _context) do\n 296 :ok\n 297 end\n \n`lib/plug/parsers/multipart.ex`\n\n 201 {:binary, name} ->\n 202 {:ok, limit, body, conn} =\n 203 parse_multipart_body(Plug.Conn.read_part_body(conn, opts), limit, opts, "")\n 204 \n 205 if Keyword.get(opts, :validate_utf8, true) do\n 206> Plug.Conn.Utils.validate_utf8!(body, Plug.Parsers.BadEncodingError, "multipart body")\n 207 end\n 208 \n 209 {conn, limit, [{name, headers, body} | acc]}\n 210 \n 211 {:file, name, path, %Plug.Upload{} = uploaded} ->\n \n`lib/plug/parsers/multipart.ex`\n\n 181 {:error, :too_large, conn}\n 182 end\n 183 end\n 184 \n 185 defp parse_multipart({:ok, headers, conn}, limit, opts, headers_opts, acc) when limit >= 0 do\n 186> {conn, limit, acc} = parse_multipart_headers(headers, conn, limit, opts, acc)\n 187 read_result = Plug.Conn.read_part_headers(conn, headers_opts)\n 188 parse_multipart(read_result, limit, opts, headers_opts, acc)\n 189 end\n 190 \n 191 defp parse_multipart({:ok, _headers, conn}, limit, _opts, _headers_opts, acc) do\n \n`lib/plug/parsers/multipart.ex`\n\n 170 parse_multipart(conn, {m2p, limit, header_opts, opts})\n 171 end\n 172 \n 173 defp parse_multipart(conn, {m2p, limit, headers_opts, opts}) do\n 174 read_result = Plug.Conn.read_part_headers(conn, headers_opts)\n 175> {:ok, limit, acc, conn} = parse_multipart(read_result, limit, opts, headers_opts, [])\n 176 \n 177 if limit > 0 do\n 178 {mod, fun, args} = m2p\n 179 apply(mod, fun, [acc, conn | args])\n 180 else\n \n`lib/plug/parsers/multipart.ex`\n\n 122 \n 123 @impl true\n 124 def parse(conn, "multipart", subtype, _headers, opts_tuple)\n 125 when subtype in ["form-data", "" <> ...,
headers: [
{"cache-control", "max-age=0, private, must-revalidate"},
{"content-length", "8895"},
{"content-type", "text/markdown; charset=utf-8"},
{"date", "Tue, 13 Feb 2024 18:29:59 GMT"},
{"server", "Cowboy"}
],
request_url: "http://localhost:52222/api/upsert_activity_attachment/user_id/mpadma/acivity_id/450",
request: %HTTPoison.Request{
method: :post,
url: "http://localhost:52222/api/upsert_activity_attachment/user_id/mpadma/acivity_id/450",
headers: [],
body: {:multipart,
[
{"attachment",
<<80, 75, 3, 4, 20, 0, 0, 0, 8, 0, 205, 29, 191, 86, 113, 102, 163, 15,
81, 6, 0, 0, 58, 10, 0, 0, 12, 0, 0, 0, 67, 117, 114, 114, ...>>,
{"form-data", [name: "attachment", filename: "ZAF (2).zip"]}, []}
]},
params: %{},
options: [
connect_timeout: 3600000,
recv_timeout: 3600000,
timeout: 3600000
]
}
}}
```

Same File without spaces.

```
options = [connect_timeout: 3_600_000, recv_timeout: 3_600_000, timeout: 3_600_000]
path_to_file = "/Users/mpadmaos10/Downloads/ZAF.zip"
file_name = "ZAF.zip"
content = File.read!(path_to_file)
headers=[{"content-type", MIME.from_path(path_to_file)}]

HTTPoison.post(url, {:multipart,[{"attachment", content, {"form-data", [name: "attachment", filename: file_name]}, []}]}, headers, options)
```

Response :

```
{:ok,
%HTTPoison.Response{
status_code: 200,
body: "{\"id\":100,\"status\":\"ok\",\"description\":\"Activity Attachment \\\"ZAF.zip\\\" added For Id = 100.\"}",
headers: [
{"access-control-allow-credentials", "true"},
{"access-control-allow-origin", "*"},
{"access-control-expose-headers", ""},
{"cache-control", "max-age=0, private, must-revalidate"},
{"content-length", "92"},
{"content-type", "application/json; charset=utf-8"},
{"date", "Tue, 13 Feb 2024 18:50:30 GMT"},
{"server", "Cowboy"},
{"x-request-id", "F7OAumZclgeU2NgAAADB"}
],
request_url: "http://localhost:52222/api/upsert_activity_attachment/user_id/mpadma/activity_id/450",
request: %HTTPoison.Request{
method: :post,
url: "http://localhost:52222/api/upsert_activity_attachment/user_id/mpadma/activity_id/450",
headers: [],
body: {:multipart,
[
{"attachment",
<<80, 75, 3, 4, 20, 0, 0, 0, 8, 0, 205, 29, 191, 86, 113, 102, 163, 15,
81, 6, 0, 0, 58, 10, 0, 0, 12, 0, 0, 0, 67, 117, 114, 114, ...>>,
{"form-data", [name: "attachment", filename: "ZAF.zip"]}, []}
]},
params: %{},
options: [
connect_timeout: 3600000,
recv_timeout: 3600000,
timeout: 3600000
]
}
}}
```