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With UGCUSE3DSERVICES=7:0 (the client's default) the client asks its world for a blueprint file's MD5 and size (REQUEST_UGC_MANIFEST_INFO, world 27) and then downloads BrickModels/UserMade/<id % 1000>/<id>.<ext>.sd0. Layouts checked in the 1.10.64 client: the request is a u64 blueprint id and a u8 resource type; the answer (UGC_MANIFEST_RESPONSE, client 60) repeats them and adds a u8 valid, the u32 size and the 16 byte MD5 of the inflated file, 37 bytes after the 0x53 exactly or the client drops it. - dNet: WorldPackets::RequestUgcManifestInfo, ClientPackets::UgcManifestResponse (eUgcResourceType), with byte tests against the client's layouts. - Database: ugc_file_checksums (per model or module combination and file) and ugc_modular_build.combination_id (migrations 89 / 72), GetUgcFileChecksum looks a blueprint up as a model, else as a build through its combination. - UGC server: every download is also written as .sd0 (Sd0::Compress); workers hand the checksums back and the main thread stores them; old items get their sd0 icon and checksum, and builds their combination id, once at start-up, a few per tick; serves <dir>/BrickModels/UserMade/<bucket>/<id>.<ext>.sd0 under client_path, /<folder>/UserBrickModels and the root (.hkx 404). - World: UgcManifest answers on the main thread with one indexed query per request; files not made yet are answered when they are (looked at again every 5 seconds), and a model in its quiet period is made right away. No worker threads, HTTP or file reads in the world. Off by default (ugc_manifest=0): checked in game, the client then downloads from http://127.0.0.1:80/lwoclient/UserBrickModels/ whatever its boot.cfg says and logs the player out when it can't connect, so icons need the UGC server on port 80 of each player's machine. docs/UgcServer.md has the details. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
30 lines
1.3 KiB
C++
30 lines
1.3 KiB
C++
#ifndef UGCMANIFEST_H
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#define UGCMANIFEST_H
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#include "dCommonVars.h"
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#include "eUgcResourceType.h"
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#include "RakNetTypes.h"
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/**
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* Answers the client's REQUEST_UGC_MANIFEST_INFO (sent when its UGCUSE3DSERVICES is off, the default): the MD5 and
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* size of a blueprint's file, which the client needs before it downloads the file from the UGC server
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* (BrickModels/UserMade/<id % 1000>/<id>.<ext>.sd0). The checksums are the ones the UGC server stored when it made the
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* files (ugc_file_checksums); a file it hasn't made yet is answered once it has (Update looks again every few seconds
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* for a while). Nothing is answered for files it never makes (LXFML, HKX), or unless `ugc_manifest` is 1: the client
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* then downloads from http://127.0.0.1:80/lwoclient/UserBrickModels/ whatever its boot.cfg says, and is logged out when
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* it can't connect there.
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*
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* Main thread only: each lookup is one indexed query and the answers are sent from here. See docs/UgcServer.md.
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*/
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namespace UgcManifest {
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void OnRequest(const SystemAddress& sysAddr, LWOOBJID blueprintId, eUgcResourceType resourceType);
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// Answers the waiting requests whose files have been made since, and forgets the ones waited on too long
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void Update();
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// A client left: its waiting requests are dropped
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void OnDisconnect(const SystemAddress& sysAddr);
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}
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#endif //!UGCMANIFEST_H
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