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// Parse the URL and get the pieces we need from it
url = require('url').parse(url);
var hostname = url.hostname, port = url.port || 80;
var path = url.pathname, query = url.query;
if (query) path += "?" + query;
// Make a simple GET request
var client = require("http").createClient(port, hostname);
var request = client.request("GET", path, {
"Host": hostname // Request headers
});
request.end();
// A function to handle the response when it starts to arrive
request.on("response", function(response) {
// Set an encoding so the body is returned as text, not bytes
response.setEncoding("utf8");
// Save the response body as it arrives
var body = ""
response.on("data", function(chunk) { body += chunk; });
// When response is complete, call the callback
response.on("end", function() {
if (callback) callback(response.statusCode, response.headers, body);
});
});
};
// Simple HTTP POST request with data as the request body
exports.post = function(url, data, callback) {
// Parse the URL and get the pieces we need from it
url = require('url').parse(url);
var hostname = url.hostname, port = url.port || 80;
var path = url.pathname, query = url.query;
if (query) path += "?" + query;
// Figure out the type of data we're sending as the request body
var type;
if (data == null) data = "";
if (data instanceof Buffer) // Binary data
type = "application/octet-stream";
else if (typeof data === "string") // String data
type = "text/plain; charset=UTF-8";
else if (typeof data === "object") { // Name=value pairs
data = require("querystring").stringify(data);
type = "application/x-www-form-urlencoded";
}
// Make a POST request, including a request body
var client = require("http").createClient(port, hostname);
var request = client.request("POST", path, {
"Host": hostname,
"Content-Type": type
});
request.write(data); // Send request body
request.end();
request.on("response", function(response) { // Handle the response
12.2 Asynchronous I/O with Node | 303
Core JavaScript
