func searchHandlerWithProxyMode()

in search.go [32:74]
38 lines of code
7 McCabe index (conditional complexity)

func searchHandlerWithProxyMode(logger *zap.Logger, indexer Indexer, proxyMode *proxymode.ProxyMode, cacheTime time.Duration) func(w http.ResponseWriter, r *http.Request) {
	return func(w http.ResponseWriter, r *http.Request) {
		logger := logger.With(apmzap.TraceContext(r.Context())...)

		filter, err := newSearchFilterFromQuery(r.URL.Query())
		if err != nil {
			badRequest(w, err.Error())
			return
		}
		opts := packages.GetOptions{
			Filter: filter,
		}

		packages, err := indexer.Get(r.Context(), &opts)
		if err != nil {
			notFoundError(w, fmt.Errorf("fetching package failed: %w", err))
			return
		}

		if proxyMode.Enabled() {
			proxiedPackages, err := proxyMode.Search(r)
			if err != nil {
				logger.Error("proxy mode: search failed", zap.Error(err))
				http.Error(w, "internal server error", http.StatusInternalServerError)
				return
			}
			packages = packages.Join(proxiedPackages)
			if !opts.Filter.AllVersions {
				packages = latestPackagesVersion(packages)
			}
		}

		data, err := getSearchOutput(r.Context(), packages)
		if err != nil {
			notFoundError(w, err)
			return
		}

		cacheHeaders(w, cacheTime)
		jsonHeader(w)
		fmt.Fprint(w, string(data))
	}
}