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);
    });
};
elect> <input type='submit' value='switch'/></form></td></tr>
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<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a'>refs</a><a class='active' href='/guix/log/tests/services/linux.scm'>log</a><a href='/guix/tree/tests/services/linux.scm?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a'>tree</a><a href='/guix/commit/tests/services/linux.scm?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a'>commit</a><a href='/guix/diff/tests/services/linux.scm?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/services/linux.scm'>
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<div class='path'>path: <a href='/guix/log/?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a'>root</a>/<a href='/guix/log/tests?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a'>tests</a>/<a href='/guix/log/tests/services?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a'>services</a>/<a href='/guix/log/tests/services/linux.scm?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a'>linux.scm</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/services/linux.scm?id=de4e4506c1a6a52692358f2c7857a3ae14c8b30a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-08-02 15:54:37 +0300'>2020-08-02</span></td><td><a href='/guix/commit/tests/services/linux.scm?id=587e0d911dfff81647015e89847084b606e68f71'>services: Add zram-device-service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/linux.scm (&lt;zram-device-configuration&gt;): New record.
(zram-device-service-type): New variable.
* doc/guix.texi (Linux Services): Document it.
* tests/services/linux.scm (zram-swap-device-test): New tests.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-01-31 23:37:13 -0500'>2020-01-31</span></td><td><a href='/guix/commit/tests/services/linux.scm?id=d3e439e355284f136ff13eb3e6fffb4661552f3b'>gnu: Add earlyoom-service-type.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/linux.scm: New file.
* tests/services/linux.scm: Add test.
* Makefile.am (SCM_TESTS): Register test.
* doc/guix.texi (Linux Services): Add a new section and document the new
service and its configuration.
</span></span></td><td>Maxim Cournoyer</td></tr>