File size: 4,991 Bytes
eb1202c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | import { Effect, Stream } from "effect"
import { Headers, HttpClientRequest } from "effect/unstable/http"
import { Auth } from "../auth"
import { render as renderEndpoint } from "../endpoint"
import { Framing, type Framing as FramingDef } from "../framing"
import type { Transport, TransportPrepareInput } from "./index"
import * as ProviderShared from "../../protocols/shared"
import { mergeJsonRecords, type LLMRequest } from "../../schema"
export type JsonRequestInput<Body> = TransportPrepareInput<Body>
export interface JsonRequestParts<Body = unknown> {
readonly url: string
readonly jsonBody: Body | Record<string, unknown>
readonly bodyText: string
readonly headers: Headers.Headers
}
export interface HttpPrepared<Frame> {
readonly request: HttpClientRequest.HttpClientRequest
readonly framing: FramingDef<Frame>
}
const applyQuery = (url: string, query: Record<string, string> | undefined) => {
if (!query) return url
const next = new URL(url)
Object.entries(query).forEach(([key, value]) => next.searchParams.set(key, value))
return next.toString()
}
const PROTOCOL_BODY_OVERLAY_DENYLIST = new Set([
"content",
"contents",
"frequencyPenalty",
"frequency_penalty",
"generationConfig",
"inferenceConfig",
"input",
"maxTokens",
"max_tokens",
"messages",
"model",
"presencePenalty",
"presence_penalty",
"responseFormat",
"response_format",
"seed",
"stop",
"stopSequences",
"stop_sequences",
"stream",
"streamOptions",
"stream_options",
"system",
"systemInstruction",
"system_instruction",
"temperature",
"thinking",
"toolChoice",
"toolConfig",
"tool_choice",
"tool_config",
"tools",
"topK",
"topP",
"top_k",
"top_p",
])
const forbiddenBodyOverlayKeys = (body: Record<string, unknown>) =>
Object.keys(body).filter((key) => PROTOCOL_BODY_OVERLAY_DENYLIST.has(key))
const bodyWithOverlay = <Body>(body: Body, request: LLMRequest, encodeBody: (body: Body) => string) =>
Effect.gen(function* () {
if (request.http?.body === undefined) return { jsonBody: body, bodyText: encodeBody(body) }
const forbiddenKeys = forbiddenBodyOverlayKeys(request.http.body)
if (forbiddenKeys.length > 0)
return yield* ProviderShared.invalidRequest(
`http.body cannot overlay protocol-owned field(s): ${forbiddenKeys.join(", ")}`,
)
if (ProviderShared.isRecord(body)) {
const overlaid = mergeJsonRecords(body, request.http.body) ?? {}
return { jsonBody: overlaid, bodyText: ProviderShared.encodeJson(overlaid) }
}
return yield* ProviderShared.invalidRequest("http.body can only overlay JSON object request bodies")
})
export const jsonRequestParts = <Body>(input: JsonRequestInput<Body>) =>
Effect.gen(function* () {
const url = applyQuery(
renderEndpoint(input.endpoint, { request: input.request, body: input.body }).toString(),
input.request.http?.query,
)
const body = yield* bodyWithOverlay(input.body, input.request, input.encodeBody)
const headers = yield* Auth.toEffect(input.auth)({
request: input.request,
method: "POST",
url,
body: body.bodyText,
headers: Headers.fromInput({
...input.headers?.({ request: input.request }),
...input.request.http?.headers,
}),
})
return { url, jsonBody: body.jsonBody, bodyText: body.bodyText, headers }
})
export interface HttpJsonInput<_Body, Frame> {
readonly framing: FramingDef<Frame>
}
export type HttpJsonPatch<Body, Frame> = Partial<HttpJsonInput<Body, Frame>>
export interface HttpJsonTransport<Body, Frame> extends Transport<Body, HttpPrepared<Frame>, Frame> {
readonly with: (patch: HttpJsonPatch<Body, Frame>) => HttpJsonTransport<Body, Frame>
}
export const httpJson = <Body, Frame>(input: HttpJsonInput<Body, Frame>): HttpJsonTransport<Body, Frame> => ({
id: "http-json",
with: (patch) => httpJson({ ...input, ...patch }),
prepare: (prepareInput) =>
jsonRequestParts({
...prepareInput,
}).pipe(
Effect.map((parts) => ({
request: ProviderShared.jsonPost({ url: parts.url, body: parts.bodyText, headers: parts.headers }),
framing: input.framing,
})),
),
frames: (prepared, request, runtime) =>
Stream.unwrap(
runtime.http
.execute(prepared.request)
.pipe(
Effect.map((response) =>
prepared.framing.frame(
response.stream.pipe(
Stream.mapError((error) =>
ProviderShared.eventError(
`${request.model.provider}/${request.model.route.id}`,
`Failed to read ${request.model.provider}/${request.model.route.id} stream`,
ProviderShared.errorText(error),
),
),
),
),
),
),
),
})
export const sseJson = {
id: "http-json/sse",
with: <Body>() => httpJson<Body, string>({ framing: Framing.sse }),
} as const
|