var fs = require("fs");
var parse = require("url").parse;
var path = require("path");

try {
    fs.mkdirSync("./tmp");
} catch (e) {
    if (e.code != "EEXIST") throw e;
}

function local(url) {
    return path.join("./tmp", encodeURIComponent(url));
}

function read(url) {
    return fs.createReadStream(local(url));
}

module.exports = function(url, callback) {
    var result = read(url);
    result.on("error", function(e) {
        if (e.code != "ENOENT") return callback(e);
        var options = parse(url);
        options.rejectUnauthorized = false;
        require(options.protocol.slice(0, -1)).get(options, function(res) {
            if (res.statusCode !== 200) return callback(res.statusCode);
            res.pipe(fs.createWriteStream(local(url)));
            callback(null, res);
        });
    }).on("open", function() {
        callback(null, result);
    });
};
/select> <input type='submit' value='switch'/></form></td></tr>
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<div class='path'>path: <a href='/guix/log/?id=7b9e90e40deceb74920adfdaaa758938f13fe594'>root</a>/<a href='/guix/log/tests?id=7b9e90e40deceb74920adfdaaa758938f13fe594'>tests</a>/<a href='/guix/log/tests/guix-package-net.sh?id=7b9e90e40deceb74920adfdaaa758938f13fe594'>guix-package-net.sh</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/guix-package-net.sh?id=7b9e90e40deceb74920adfdaaa758938f13fe594&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-04-21 16:16:38 +0200'>2023-04-21</span></td><td><a href='/guix/commit/tests/guix-package-net.sh?id=37dd69b44511dc73eb04bdebe8d82c9a0386338e'>tests: Fix checks for expected failures.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>