32 lines
809 B
JavaScript
32 lines
809 B
JavaScript
var fs = require("fs");
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var path = require("path");
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try {
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fs.mkdirSync("./tmp");
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} catch (e) {
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if (e.code != "EEXIST") throw e;
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}
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function local(url) {
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return path.join("./tmp", encodeURIComponent(url));
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}
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function read(url) {
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return fs.createReadStream(local(url));
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}
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module.exports = function(url, callback) {
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var result = read(url);
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result.on("error", function(e) {
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if (e.code != "ENOENT") return callback(e);
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require(url.slice(0, url.indexOf(":"))).get(url, function(res) {
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if (res.statusCode !== 200) return callback(res);
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res.pipe(fs.createWriteStream(local(url)).on("close", function() {
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callback(null, read(url));
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}));
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});
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}).on("open", function() {
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callback(null, result);
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});
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};
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