@expo/cli/build/src/start/server/middleware/HistoryFallbackMiddleware.js

The Expo CLI

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
Object.defineProperty(exports, "HistoryFallbackMiddleware", {
    enumerable: true,
    get: function() {
        return HistoryFallbackMiddleware;
    }
});
const _resolvePlatform = require("./resolvePlatform");
class HistoryFallbackMiddleware {
    constructor(indexMiddleware){
        this.indexMiddleware = indexMiddleware;
    }
    getHandler() {
        return (req, res, next)=>{
            const platform = (0, _resolvePlatform.parsePlatformHeader)(req);
            if (!platform || platform === 'web') {
                // Redirect unknown to the manifest handler while preserving the path.
                // This implements the HTML5 history fallback API.
                return this.indexMiddleware(req, res, next);
            }
            return next();
        };
    }
}

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