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fix(apiproxy): configure session export compression

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Session-log ZIP entries always used DEFLATE level 6 even though compression level is a deployment tradeoff: CPU-constrained hosts may prefer low latency while bandwidth-constrained hosts may prefer smaller archives. A hardcoded level also violated the repository rule that deployment-varying plugin choices live in validated Config.

Add sessionExportCompressionLevel to ApiProxyService.Config as an integer 0-9 with default 6, resolve the same default once for direct createApiProxy callers, and pass the required level into the streaming module. Tests prove schema defaulting and rejection as well as a level-0 versus level-9 archive-size difference with identical extracted content. The generated config catalog, bilingual gateway README, and feature note document the knob and its tradeoff.
This commit is contained in:
Tianyi Cui
2026-08-11 15:24:14 +08:00
parent 1419671f3f
commit 8a2a22db84
13 changed files with 101 additions and 21 deletions
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10
packages/host/apiproxy/src/session-export.ts
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@@ -26,6 +26,12 @@ import type { SessionLineageNode, SessionQueryService } from '@deepseek-ai/dsh-s
import type { SessionId, SessionStore } from '@deepseek-ai/dsh-session'
import type { SessionPersistence, SessionRawArtifact } from '@deepseek-ai/dsh-session-persistence'
/** Valid fflate DEFLATE levels accepted by session-log export. */
export type SessionLogCompressionLevel = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
/** Balanced default used when a direct createApiProxy caller omits deployment config. */
export const DEFAULT_SESSION_LOG_COMPRESSION_LEVEL: SessionLogCompressionLevel = 6
/** The services a session-log export needs (the live-session store is optional). */
export interface SessionLogExportDeps {
readonly sessionQuery: SessionQueryService | undefined
@@ -375,6 +381,7 @@ async function pushArtifactChunks(
* @param root - the already-read root artifact (first zip entry).
* @param sessionId - the root session id.
* @param includeDescendants - whether to include every subagent descendant.
* @param compressionLevel - validated fflate DEFLATE level for every ZIP entry.
* @param signal - request cancellation combined with response-consumer cancellation.
* @returns the zip byte stream.
*/
@@ -383,6 +390,7 @@ export function streamSessionLogZip(
root: SessionRawArtifact,
sessionId: SessionId,
includeDescendants: boolean,
compressionLevel: SessionLogCompressionLevel,
signal: AbortSignal,
): ReadableStream<Uint8Array> {
const consumerAbort = new AbortController()
@@ -415,7 +423,7 @@ export function streamSessionLogZip(
void (async () => {
try {
for await (const entry of sessionLogZipEntries(deps, root, sessionId, includeDescendants, producerSignal)) {
const deflate = new ZipDeflate(entry.path, { level: 6 })
const deflate = new ZipDeflate(entry.path, { level: compressionLevel })
archive.add(deflate)
if ('content' in entry) {
await pushArtifactChunks(deflate, entry.content, controller, capacity, producerSignal)