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var http = require('http');
var https = require('https');
var url = require('url');
var isHttpResource = require('../utils/is-http-resource');
var isHttpsResource = require('../utils/is-https-resource');
var override = require('../utils/override');
var HTTP_PROTOCOL = 'http:';
function loadRemoteResource(uri, inlineRequest, inlineTimeout, callback) {
var proxyProtocol = inlineRequest.protocol || inlineRequest.hostname;
var errorHandled = false;
var requestOptions;
var fetch;
requestOptions = override(
url.parse(uri),
inlineRequest || {}
);
if (inlineRequest.hostname !== undefined) {
// overwrite as we always expect a http proxy currently
requestOptions.protocol = inlineRequest.protocol || HTTP_PROTOCOL;
requestOptions.path = requestOptions.href;
}
fetch = (proxyProtocol && !isHttpsResource(proxyProtocol)) || isHttpResource(uri) ?
http.get :
https.get;
fetch(requestOptions, function (res) {
var chunks = [];
var movedUri;
if (errorHandled) {
return;
}
if (res.statusCode < 200 || res.statusCode > 399) {
return callback(res.statusCode, null);
} else if (res.statusCode > 299) {
movedUri = url.resolve(uri, res.headers.location);
return loadRemoteResource(movedUri, inlineRequest, inlineTimeout, callback);
}
res.on('data', function (chunk) {
chunks.push(chunk.toString());
});
res.on('end', function () {
var body = chunks.join('');
callback(null, body);
});
})
.on('error', function (res) {
if (errorHandled) {
return;
}
errorHandled = true;
callback(res.message, null);
})
.on('timeout', function () {
if (errorHandled) {
return;
}
errorHandled = true;
callback('timeout', null);
})
.setTimeout(inlineTimeout);
}
module.exports = loadRemoteResource;
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