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add check for openai stainless streaming header #172

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add check for openai stainless streaming header #172

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9 changes: 9 additions & 0 deletions packages/proxy/src/proxy.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,8 @@ export const CACHED_HEADER = "x-bt-cached";

export const USED_ENDPOINT_HEADER = "x-bt-used-endpoint";

export const OAI_STAINLESS_METHOD_HEADER = "x-stainless-helper-method";

const CACHE_MODES = ["auto", "always", "never"] as const;

// Options to control how the cache key is generated.
Expand Down Expand Up @@ -334,6 +336,13 @@ export async function proxyV1({

let startTime = getCurrentUnixTimestamp();
let spanType: SpanType | undefined = undefined;
// TEMP: support OAI streaming via oai.beta.chat.completions.stream
// openai-node currently overrides the usual stream param to false
const isStainlessStream =
proxyHeaders[OAI_STAINLESS_METHOD_HEADER] === "stream";
if (isStainlessStream && bodyData) {
bodyData.stream = true;
}
const isStreaming = !!bodyData?.stream;

let stream: ReadableStream<Uint8Array> | null = null;
Expand Down