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Fix http_request:http_headers/1 to send content-length when length is…

… zero

In R16B01, the http_request:http_headers/1 function removes the content-length
field from the HTTP headers if the content length is zero. This results in
some (perhaps many) HTTP servers rejecting POSTs and PUTs without data with
a 411 status word. From RFC2616, section 14.13: "Any Content-Length greater than
or EQUAL to zero is a valid value".
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commit 5e7c3147b25b96cf08c3083cbb32f18f955f6f0f 1 parent 3ec3fcf
@hammingweight hammingweight authored IngelaAndin committed
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9 lib/inets/src/http_lib/http_request.erl
@@ -248,13 +248,8 @@ key_value_str(Key = 'content-language', Headers) ->
key_value_str(atom_to_list(Key),
Headers#http_request_h.'content-language');
key_value_str(Key = 'content-length', Headers) ->
- case Headers#http_request_h.'content-length' of
- "0" ->
- undefined;
- _ ->
- key_value_str(atom_to_list(Key),
- Headers#http_request_h.'content-length')
- end;
+ key_value_str(atom_to_list(Key),
+ Headers#http_request_h.'content-length');
key_value_str(Key = 'content-location', Headers) ->
key_value_str(atom_to_list(Key),
Headers#http_request_h.'content-location');
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24 lib/inets/test/http_format_SUITE.erl
@@ -35,14 +35,15 @@
chunk_decode_trailer/1,
http_response/1, http_request/1, validate_request_line/1,
esi_parse_headers/1, cgi_parse_headers/1,
- is_absolut_uri/1, convert_netscapecookie_date/1]).
+ is_absolut_uri/1, convert_netscapecookie_date/1,
+ check_content_length_encoding/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[{group, chunk}, http_response, http_request,
validate_request_line, {group, script}, is_absolut_uri,
- convert_netscapecookie_date].
+ convert_netscapecookie_date, check_content_length_encoding].
groups() ->
[{script, [], [esi_parse_headers, cgi_parse_headers]},
@@ -456,6 +457,25 @@ validate_request_line(Config) when is_list(Config) ->
httpd_request:validate("GET", NewForbiddenUri1, "HTTP/1.1"),
ok.
+
+%%-------------------------------------------------------------------------
+check_content_length_encoding(doc) ->
+ ["Test http_request:headers/2. Check that the content-length is"
+ " encoded even when it is zero." ];
+check_content_length_encoding(suite) ->
+ [];
+check_content_length_encoding(Config) when is_list(Config) ->
+
+ %% Check that the content-length is preserved.
+ %% Sanity check.
+ Header1 = http_request:http_headers(#http_request_h{'content-length'="123"}),
+ true = (string:str(Header1, "content-length: 123\r\n") > 0),
+ %% Check that content-length=0 is handled correctly.
+ Header2 = http_request:http_headers(#http_request_h{'content-length'="0"}),
+ true = (string:str(Header2, "content-length: 0\r\n") > 0),
+
+ ok.
+
%%-------------------------------------------------------------------------
esi_parse_headers(doc) ->
["Test httpd_esi:*. All header values are received in the same"
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