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import { ProxyReqMutator } from "../index";
/**
* For AWS/GCP/Azure/Google requests, the body is signed earlier in the request
* pipeline, before the proxy middleware. This function just assigns the path
* and headers to the proxy request.
*/
export const finalizeSignedRequest: ProxyReqMutator = (manager) => {
const req = manager.request;
if (!req.signedRequest) {
throw new Error("Expected req.signedRequest to be set");
}
// The path depends on the selected model and the assigned key's region.
manager.setPath(req.signedRequest.path);
// Amazon doesn't want extra headers, so we need to remove all of them and
// reassign only the ones specified in the signed request.
const headers = req.signedRequest.headers;
Object.keys(headers).forEach((key) => {
manager.removeHeader(key);
});
Object.entries(req.signedRequest.headers).forEach(([key, value]) => {
manager.setHeader(key, value);
});
const serialized =
typeof req.signedRequest.body === "string"
? req.signedRequest.body
: JSON.stringify(req.signedRequest.body);
manager.setHeader("Content-Length", String(Buffer.byteLength(serialized)));
manager.setBody(serialized);
};
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