// synchronously process the request from requestBuffer, and return statusCode
public int Process(HttpCtx ctx, int dummy)
{
var startTime = Stats.Watch.Elapsed;
// path sanity check
foreach (var query in ctx.Params)
{
var value = query.Value;
if (value.IsEmpty)
{
return(400);
}
if (query.Key != "query_id")
{
// all other parameters are invalid
return(400);
}
}
// parse Json and process dto
var buffer = ctx.Buffer;
var start = ctx.RequestBodyStart;
var dto = DtoLikes.Obtain();
int statusCode = 400;
try
{
if (DtoLikes.Parse(buffer, start, dto, store))
{
// update the likes in the storage
statusCode = store.VerifyNewLikes(dto);
if (statusCode == 202)
{
ctx.PostAction = () =>
{
store.PostNewLikes(dto);
DtoLikes.Release(dto);
}
}
;
}
}
catch (Exception)
{
// fall through
}
if (ctx.PostAction == null)
{
DtoLikes.Release(dto);
}
var stopTime = Stats.Watch.Elapsed;
ctx.ContextType = "PostLikes";
// return the result
return(statusCode);
}
public static DtoLikes Obtain()
{
if (!bag.TryTake(out var obj))
{
obj = new DtoLikes();
}
return(obj);
}
// post-processing, serialized
public void PostNewLikes(DtoLikes dtoLikes)
{
for (int i = 0; i < dtoLikes.likes.Count; i++)
{
var dtoLike = dtoLikes.likes[i];
var id = dtoLike.liker;
var acct = Accounts[id];
var like = new Like {
id = dtoLike.likee, ts = dtoLike.ts
};
addLike(id, ref acct, like);
Accounts[id] = acct;
}
}
// pre-validation
public int VerifyNewLikes(DtoLikes dtoLikes)
{
bool lockTaken = false;
try
{
updateLock.Enter(ref lockTaken);
if (!verifyLikes(dtoLikes.likes))
{
return(400);
}
}
finally
{
if (lockTaken)
{
updateLock.Exit();
}
}
return(202);
}
public static bool Parse(byte[] buffer, int start, DtoLikes dto, Storage store)
{
JsonReader reader = new JsonReader(buffer, start);
if (reader.ReadIsNull() || !reader.ReadIsBeginObject())
{
return(false);
}
if (!reader.ReadPropertyNameSegmentRaw().EqualTo(s_likes))
{
return(false);
}
// read array members
if (!reader.ReadIsBeginArray())
{
return(false);
}
while (true)
{
var like = new DtoLike();
// read array of DtoLike objects
if (!reader.ReadIsBeginObject())
{
break;
}
// like properties
while (true)
{
var prop = reader.ReadPropertyNameSegmentRaw();
if (prop[0] == (byte)'t') // ts
{
if (reader.GetCurrentJsonToken() != JsonToken.Number)
{
return(false);
}
like.ts = Like.ExtToIntTS(reader.ReadInt32());
}
else
if (prop[prop.Count - 1] == (byte)'e') // likee
{
if (reader.GetCurrentJsonToken() != JsonToken.Number)
{
return(false);
}
if (!Mapper.ExtIdToIntId(reader.ReadInt32(), out like.likee))
{
return(false);
}
}
else
if (prop[prop.Count - 1] == (byte)'r') // liker
{
if (reader.GetCurrentJsonToken() != JsonToken.Number)
{
return(false);
}
if (!Mapper.ExtIdToIntId(reader.ReadInt32(), out like.liker))
{
return(false);
}
}
else
{
return(false);
}
if (!reader.ReadIsValueSeparator())
{
break;
}
}
if (!reader.ReadIsEndObject())
{
return(false);
}
// add the like
if (like.likee > 0 && like.liker > 0)
{
dto.likes.Add(like);
}
else
{
return(false);
}
if (!reader.ReadIsValueSeparator())
{
break;
}
}
if (!reader.ReadIsEndArray())
{
return(false);
}
if (!reader.ReadIsEndObject())
{
return(false);
}
return(true);
}
public static void Release(DtoLikes obj)
{
obj.Reset();
bag.Add(obj);
}
