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ircd:Ⓜ️:fed::well_known: Move valid cache hit branch before fetch; minor cleanup.

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This commit is contained in:
Jason Volk 2020-10-05 21:52:22 -07:00
parent 9f38a58402
commit 0f94fe66cb
1 changed files with 17 additions and 19 deletions
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36
matrix/fed_well_known.cc
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@ -105,11 +105,6 @@ try
content.get<time_t>("ttl", time_t(86400))
};
const string_view cached
{
data(buf), move(buf, json::string(content["m.server"]))
};
const system_point expires
{
origin_server_ts + ttl
@ -120,24 +115,16 @@ try
ircd::now<system_point>() > expires
};
const string_view cached
{
data(buf), move(buf, json::string(content["m.server"]))
};
const bool valid
{
!empty(cached)
};
// Crucial value that will provide us with a return string for this
// function in any case. This is obtained by either using the value
// found in cache or making a network query for a new value. expired=true
// when a network query needs to be made, otherwise we can return the
// cached value. If the network query fails, this value is still defaulted
// as the origin string to return and we'll also cache that too.
const string_view delegated
{
expired || !valid?
fetch(buf + size(cached), origin):
cached
};
// Branch on valid cache hit to return result.
if(valid && !expired)
{
@ -151,9 +138,20 @@ try
timef(tmbuf, expires, localtime),
};
return delegated;
return cached;
}
// Crucial value that will provide us with a return string for this
// function in any case. This is obtained by either using the value
// found in cache or making a network query for a new value. expired=true
// when a network query needs to be made, otherwise we can return the
// cached value. If the network query fails, this value is still defaulted
// as the origin string to return and we'll also cache that too.
const string_view delegated
{
fetch(buf + size(cached), origin)
};
// Conditions for valid expired cache hit w/ failure to reacquire.
const bool fallback
{