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feat(task): add model redirection, per-call billing, and multipart retry fix for async tasks

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1. Async task model redirection (aligned with sync tasks):
   - Integrate ModelMappedHelper in RelayTaskSubmit after model name
     determination, populating OriginModelName / UpstreamModelName on RelayInfo.
   - All task adaptors now send UpstreamModelName to upstream providers:
     - Gemini & Vertex: BuildRequestURL uses UpstreamModelName.
     - Doubao & Ali: BuildRequestBody conditionally overwrites body.Model.
     - Vidu, Kling, Hailuo, Jimeng: convertToRequestPayload accepts RelayInfo
       and unconditionally uses info.UpstreamModelName.
     - Sora: BuildRequestBody parses JSON and multipart bodies to replace
       the "model" field with UpstreamModelName.
   - Frontend log visibility: LogTaskConsumption and taskBillingOther now
     emit is_model_mapped / upstream_model_name in the "other" JSON field.
   - Billing safety: RecalculateTaskQuotaByTokens reads model name from
     BillingContext.OriginModelName (via taskModelName) instead of
     task.Data["model"], preventing billing leaks from upstream model names.

2. Per-call billing (TaskPricePatches lifecycle):
   - Rename TaskBillingContext.ModelName → OriginModelName; add PerCallBilling
     bool field, populated from TaskPricePatches at submission time.
   - settleTaskBillingOnComplete short-circuits when PerCallBilling is true,
     skipping both adaptor adjustments and token-based recalculation.
   - Remove ModelName from TaskSubmitResult; use relayInfo.OriginModelName
     consistently in controller/relay.go for billing context and logging.

3. Multipart retry boundary mismatch fix:
   - Root cause: after Sora (or OpenAI audio) rebuilds a multipart body with a
     new boundary and overwrites c.Request.Header["Content-Type"], subsequent
     calls to ParseMultipartFormReusable on retry would parse the cached
     original body with the wrong boundary, causing "NextPart: EOF".
   - Fix: ParseMultipartFormReusable now caches the original Content-Type in
     gin context key "_original_multipart_ct" on first call and reuses it for
     all subsequent parses, making multipart parsing retry-safe globally.
   - Sora adaptor reverted to the standard pattern (direct header set/get),
     which is now safe thanks to the root fix.

4. Tests:
   - task_billing_test.go: update makeTask to use OriginModelName; add
     PerCallBilling settlement tests (skip adaptor adjust, skip token recalc);
     add non-per-call adaptor adjustment test with refund verification.
This commit is contained in:
CaIon
2026-02-22 15:32:33 +08:00
parent 9976b311ef
commit ec5c6b28ea
19 changed files with 277 additions and 78 deletions
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11
model/task.go
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@@ -109,11 +109,12 @@ type TaskPrivateData struct {
// TaskBillingContext 记录任务提交时的计费参数，以便轮询阶段可以重新计算额度。
type TaskBillingContext struct {
ModelPrice float64 `json:"model_price,omitempty"` // 模型单价
GroupRatio float64 `json:"group_ratio,omitempty"` // 分组倍率
ModelRatio float64 `json:"model_ratio,omitempty"` // 模型倍率
OtherRatios map[string]float64 `json:"other_ratios,omitempty"` // 附加倍率（时长、分辨率等）
ModelName string `json:"model_name,omitempty"` // 模型名称
ModelPrice float64 `json:"model_price,omitempty"` // 模型单价
GroupRatio float64 `json:"group_ratio,omitempty"` // 分组倍率
ModelRatio float64 `json:"model_ratio,omitempty"` // 模型倍率
OtherRatios map[string]float64 `json:"other_ratios,omitempty"` // 附加倍率（时长、分辨率等）
OriginModelName string `json:"origin_model_name,omitempty"` // 模型名称，必须为OriginModelName
PerCallBilling bool `json:"per_call_billing,omitempty"` // 按次计费：跳过轮询阶段的差额结算
}
// GetUpstreamTaskID 获取上游真实 task ID（用于与 provider 通信）