Function schemeFetch

deps/undici/undici.js:13778–13868

(fetchParams)

    }
    __name(mainFetch, "mainFetch");
    function schemeFetch(fetchParams) {
      if (isCancelled(fetchParams) && fetchParams.request.redirectCount === 0) {
        return Promise.resolve(makeAppropriateNetworkError(fetchParams));
      }
      const { request } = fetchParams;
      const { protocol: scheme } = requestCurrentURL(request);
      switch (scheme) {
        case "about:": {
          return Promise.resolve(makeNetworkError("about scheme is not supported"));
        }
        case "blob:": {
          if (!resolveObjectURL) {
            resolveObjectURL = require("node:buffer").resolveObjectURL;
          }
          const blobURLEntry = requestCurrentURL(request);
          if (blobURLEntry.search.length !== 0) {
            return Promise.resolve(makeNetworkError("NetworkError when attempting to fetch resource."));
          }
          const blob = resolveObjectURL(blobURLEntry.toString());
          if (request.method !== "GET" || !webidl.is.Blob(blob)) {
            return Promise.resolve(makeNetworkError("invalid method"));
          }
          const response = makeResponse();
          const fullLength = blob.size;
          const serializedFullLength = isomorphicEncode(`${fullLength}`);
          const type = blob.type;
          if (!request.headersList.contains("range", true)) {
            const bodyWithType = extractBody(blob);
            response.statusText = "OK";
            response.body = bodyWithType[0];
            response.headersList.set("content-length", serializedFullLength, true);
            response.headersList.set("content-type", type, true);
          } else {
            response.rangeRequested = true;
            const rangeHeader = request.headersList.get("range", true);
            const rangeValue = simpleRangeHeaderValue(rangeHeader, true);
            if (rangeValue === "failure") {
              return Promise.resolve(makeNetworkError("failed to fetch the data URL"));
            }
            let { rangeStartValue: rangeStart, rangeEndValue: rangeEnd } = rangeValue;
            if (rangeStart === null) {
              rangeStart = fullLength - rangeEnd;
              rangeEnd = rangeStart + rangeEnd - 1;
            } else {
              if (rangeStart >= fullLength) {
                return Promise.resolve(makeNetworkError("Range start is greater than the blob's size."));
              }
              if (rangeEnd === null || rangeEnd >= fullLength) {
                rangeEnd = fullLength - 1;
              }
            }
            const slicedBlob = blob.slice(rangeStart, rangeEnd + 1, type);
            const slicedBodyWithType = extractBody(slicedBlob);
            response.body = slicedBodyWithType[0];
            const serializedSlicedLength = isomorphicEncode(`${slicedBlob.size}`);
            const contentRange = buildContentRange(rangeStart, rangeEnd, fullLength);
            response.status = 206;
            response.statusText = "Partial Content";