vibe.d maxRequestSize

[Steven Schveighoffer via Digitalmars-d-learn]

On 9/19/16 1:34 PM, Chris wrote:
> On Monday, 19 September 2016 at 16:55:05 UTC, Steven Schveighoffer wrote:
>
>>
>>
>> Hm... you don't get a full stack trace? Hard to tell what max_bytes
>> should be, it defaults to ulong.max, so no way you are exhausting
>> that. Without knowing where readUntilSmall is called, it's hard to
>> diagnose.
>>
>> -Steve
>
> I didn't want to litter the thread, here it is:
>
> 400 - Bad Request
>
> Bad Request
>
> Internal error information:
> object.Exception at ../../.dub/packages/vibe-d-0.7.29/vibe-d/source/vibe/stream/operations.d(349):
> Reached maximum number of bytes while searching for end marker.
> ----------------
> /home/chris/.dvm/compilers/dmd-2.071.1/linux/bin/../../src/phobos/std/exception.d:405
> pure @safe void
> std.exception.bailOut!(Exception).bailOut(immutable(char)[], ulong,
> const(char[])) [0x8f11a7]
> /home/chris/.dvm/compilers/dmd-2.071.1/linux/bin/../../src/phobos/std/exception.d:363
> pure @safe bool std.exception.enforce!(Exception, bool).enforce(bool,
> lazy const(char)[], immutable(char)[], ulong) [0x8f112a]
> .../../.dub/packages/vibe-d-0.7.29/vibe-d/source/vibe/stream/operations.d:348
> void
> vibe.stream.operations.readUntilSmall!(vibe.utils.array.AllocAppender!(ubyte[],
> ubyte).AllocAppender).readUntilSmall(vibe.core.stream.InputStream, ref
> vibe.utils.array.AllocAppender!(ubyte[], ubyte).AllocAppender,
> const(ubyte[]), ulong) [0xb06b00]
> .../../.dub/packages/vibe-d-0.7.29/vibe-d/source/vibe/stream/operations.d:137
> void
> vibe.stream.operations.readUntil!(vibe.utils.array.AllocAppender!(ubyte[],
> ubyte).AllocAppender).readUntil(vibe.core.stream.InputStream, ref
> vibe.utils.array.AllocAppender!(ubyte[], ubyte).AllocAppender,
> const(ubyte[]), ulong) [0xb06a1f]
> .../../.dub/packages/vibe-d-0.7.29/vibe-d/source/vibe/stream/operations.d:53
> void
> vibe.stream.operations.readLine!(vibe.utils.array.AllocAppender!(ubyte[], ubyte).AllocAppender).readLine(vibe.core.stream.InputStream,
> ref vibe.utils.array.AllocAppender!(ubyte[], ubyte).AllocAppender,
> ulong, immutable(char)[]) [0xb069c8]
> .../../.dub/packages/vibe-d-0.7.29/vibe-d/source/vibe/stream/operations.d:39
> ubyte[]
> vibe.stream.operations.readLine!().readLine(vibe.core.stream.InputStream, ulong,
> immutable(char)[], vibe.utils.memory.Allocator) [0xb06984]
> .../../.dub/packages/vibe-d-0.7.29/vibe-d/source/vibe/http/server.d:1861
> void
> vibe.http.server.parseRequestHeader(vibe.http.server.HTTPServerRequest,
> vibe.core.stream.InputStream, vibe.utils.memory.Allocator, ulong)
> [0xb5e827]

Here is the culprit:

https://github.com/rejectedsoftware/vibe.d/blob/0.7.29/source/vibe/http/server.d#L1861

And the definition of MaxHTTPHeaderLineLength is:

https://github.com/rejectedsoftware/vibe.d/blob/0.7.29/source/vibe/http/server.d#L1861

4096 bytes.

I'm not super-familiar with HTTP protocol requirements, but a further 
diagnosis of your net traffic may reveal that your browser is doing 
something unorthodox, or vibe needs to adjust here.

-Steve