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Allow empty reason string in validation of HTTP response.

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HTTP/1.0 and HTTP/1.1 allow the reason string to be empty.
Some servers produce empty reason strings on success,
e.g. "HTTP/1.1 200 ", which throws a "bad HTTP response"
exception.

From the specification:
    "Reason-Phrase  = *<TEXT, excluding CR, LF>"

From notational conventions:
    "*(element) allows any number, including zero"

References:
www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2
www.w3.org/Protocols/HTTP/1.0/spec.html
www.w3.org/Protocols/rfc2616/rfc2616-sec6.html
This commit is contained in:
Richard Senior 2017-02-01 09:20:01 +00:00
parent c87dff7e8f
commit 6334c30eb6
1 changed files with 3 additions and 3 deletions
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6
simgear/io/HTTPRequest.cxx
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@ -132,15 +132,15 @@ Request::HTTPVersion decodeHTTPVersion(const std::string& v)
//------------------------------------------------------------------------------
void Request::responseStart(const std::string& r)
{
const int maxSplit = 2; // HTTP/1.1 nnn reason-string
const int maxSplit = 2; // HTTP/1.1 nnn reason-string?
string_list parts = strutils::split(r, NULL, maxSplit);
if (parts.size() != 3) {
if (parts.size() < 2) {
throw sg_io_exception("bad HTTP response:" + r);
}
_responseVersion = decodeHTTPVersion(parts[0]);
_responseStatus = strutils::to_int(parts[1]);
_responseReason = parts[2];
_responseReason = parts.size() > 2 ? parts[2] : "";
setReadyState(STATUS_RECEIVED);
}