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var url = require("url") | |
module.exports = rest | |
function rest(db) { | |
return function route(req, res) { | |
var uri = url.parse(req.url) | |
, paths = uri.pathname.split("/") | |
, length = paths.length | |
, key = paths[length - 1] | |
, method = paths[length - 2] | |
, action | |
if (method === "get") { | |
action = "get" | |
} else if (method === "put") { | |
action = "put" | |
} else if (method === "del") { | |
action = "del" | |
} else if (method === "batch") { | |
action = "batch" | |
} else if (method === "readStream") { | |
action = "readStream" | |
} else if (req.method === "GET") { | |
action = "get" | |
} else if (req.method === "POST" || req.method === "PUT") { | |
action = "put" | |
} else if (req.method === "DELETE") { | |
action = "del" | |
} | |
if (action === "get") { | |
db.get(key, returnValue) | |
} else if (action === "del") { | |
db.del(key, returnValue) | |
} else if (action === "readStream") { | |
var parts = key.split("~") | |
var stream = db.readStream({ | |
start: parts[0] | |
, end: parts[1] | |
}) | |
res.setHeader("content-type", "application/json") | |
stream.on("data", function (chunk) { | |
res.write(JSON.stringify(chunk) + "\n") | |
}) | |
stream.on("end", function () { | |
res.end() | |
}) | |
} else { | |
jsonBody(res, res, function (err, body) { | |
if (err) { | |
return error(req, res, err) | |
} | |
if (action === "put") { | |
db.put(key, body, returnValue) | |
} else if (action === "batch") { | |
db.batch(value, returnValue) | |
} | |
}) | |
} | |
function returnValue(err, value) { | |
if (err) { | |
return error(req, res, err) | |
} | |
sendJson(req, res, value) | |
} | |
} | |
} | |
function jsonBody(req, res, callback) { | |
var result = "" | |
req.on("data", function (chunk) { | |
result += chunk | |
}) | |
req.on("end", function () { | |
var json | |
try { | |
json = JSON.parse(result) | |
} catch (err) { | |
callback(err) | |
} | |
callbak(null, json) | |
}) | |
} | |
function error(req, res, err) { | |
res.statusCode = 500 | |
res.end(err.message) | |
} | |
function sendJson(req, res, data) { | |
res.setHeader("content-type", "application/json") | |
res.statusCode = 200 | |
data = new Buffer(JSON.stringify(data)) | |
res.setHeader("content-length", data.length) | |
res.end(data) | |
} |
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