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Added option to ignore rewrite for existing file urls. #5

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c809885
Added option to ignore rewrite for existing file urls.
nleclerc Jun 30, 2014
4ae435d
Fixed error when requesting file path that doesn't exist.
nleclerc Jul 1, 2014
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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@ var gateway_rw = require('gateway-rewrite');

var rwGateway = function (dir){
return gateway_rw(require('path').resolve(dir), {
// ignoreExistingFiles: true // Uncomment this line to allow fallthrough to following middleware when requesting a file that actually exists.
rules: [
{
rule: '^(/api/.+)',
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169 changes: 87 additions & 82 deletions gateway-rewrite.js
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Original file line number Diff line number Diff line change
Expand Up @@ -47,106 +47,111 @@ module.exports = function gateway_rewrite(docroot, options) {

req.pause()

for (var j = 0; j < options.rules.length && !matches; j++) {
var rule = options.rules[j].rule;
var re = new RegExp(rule);

if (url.pathname.match(re)) {
matches ++;
var handler = options.rules[j].cgi
var file = options.rules[j].to
var uri = url.pathname
var path = normalize(join(docroot, file))

// populate the environment
var host = (req.headers.host || '').split(':')
var env = {
SERVER_ROOT: docroot,
DOCUMENT_ROOT: docroot,
SERVER_NAME: host[0],
SERVER_PORT: host[1] || 80,
HTTPS: req.connection.encrypted ? 'On' : 'Off',
REDIRECT_STATUS: 200,

SCRIPT_NAME: file,
REQUEST_URI: uri,
SCRIPT_FILENAME: path,
PATH_TRANSLATED: path,
REQUEST_METHOD: req.method,
QUERY_STRING: url.query || '',
GATEWAY_INTERFACE: 'CGI/1.1',
SERVER_PROTOCOL: 'HTTP/1.1',
PATH: process.env.PATH,
__proto__: options.env || {},

REMOTE_ADDR: '127.0.0.1' // Fake
}
var ignoreExistingFiles = options.ignoreExistingFiles
var requestedPath = join(docroot, url.pathname)

if (!ignoreExistingFiles || !fs.existsSync(requestedPath) || !fs.lstatSync(requestedPath).isFile()) {
for (var j = 0; j < options.rules.length && !matches; j++) {
var rule = options.rules[j].rule;
var re = new RegExp(rule);

if (url.pathname.match(re)) {
matches ++;
var handler = options.rules[j].cgi
var file = options.rules[j].to
var uri = url.pathname
var path = normalize(join(docroot, file))

// populate the environment
var host = (req.headers.host || '').split(':')
var env = {
SERVER_ROOT: docroot,
DOCUMENT_ROOT: docroot,
SERVER_NAME: host[0],
SERVER_PORT: host[1] || 80,
HTTPS: req.connection.encrypted ? 'On' : 'Off',
REDIRECT_STATUS: 200,

SCRIPT_NAME: file,
REQUEST_URI: uri,
SCRIPT_FILENAME: path,
PATH_TRANSLATED: path,
REQUEST_METHOD: req.method,
QUERY_STRING: url.query || '',
GATEWAY_INTERFACE: 'CGI/1.1',
SERVER_PROTOCOL: 'HTTP/1.1',
PATH: process.env.PATH,
__proto__: options.env || {},

REMOTE_ADDR: '127.0.0.1' // Fake
}

// expose request headers
for (var header in req.headers) {
var name = 'HTTP_' + header.toUpperCase().replace(/-/g, '_')
env[name] = req.headers[header]
}
// expose request headers
for (var header in req.headers) {
var name = 'HTTP_' + header.toUpperCase().replace(/-/g, '_')
env[name] = req.headers[header]
}

if ('content-length' in req.headers) {
env.CONTENT_LENGTH = req.headers['content-length']
}
if ('content-length' in req.headers) {
env.CONTENT_LENGTH = req.headers['content-length']
}

if ('content-type' in req.headers) {
env.CONTENT_TYPE = req.headers['content-type']
}
if ('content-type' in req.headers) {
env.CONTENT_TYPE = req.headers['content-type']
}


var child = spawn(handler, [], {
'env': env
}).on('exit', function (code) {
exit = code
done()
})
var child = spawn(handler, [], {
'env': env
}).on('exit', function (code) {
exit = code
done()
})

var line = []
var line = []

child.stdout.on('end', done).on('data', function (buf) {
child.stdout.on('end', done).on('data', function (buf) {

if (body) {
return res.write(buf)
}
if (body) {
return res.write(buf)
}

for (var i = 0; i < buf.length; i++) {
for (var i = 0; i < buf.length; i++) {

var c = buf[i]
var c = buf[i]

if (c == 0xA) {
if (!line.length) {
body = true
res.writeHead(statusCode || 200, reason)
res.write(buf.slice(i + 1))
return
}
if (c == 0xA) {
if (!line.length) {
body = true
res.writeHead(statusCode || 200, reason)
res.write(buf.slice(i + 1))
return
}

var s = line.join('')
line = []
if (!statusCode) {
var m = statusExp.exec(s)
if (m) {
statusCode = m[1]
reason = m[2]
continue;
var s = line.join('')
line = []
if (!statusCode) {
var m = statusExp.exec(s)
if (m) {
statusCode = m[1]
reason = m[2]
continue;
}
}
}

var idx = s.indexOf(':')
if ( !body ) {
var idx = s.indexOf(':')
if ( !body ) {
}
res.setHeader(s.slice(0, idx), s.slice(idx + 1).trim())
} else if (c != 0xD) {
line.push(String.fromCharCode(c))
}
res.setHeader(s.slice(0, idx), s.slice(idx + 1).trim())
} else if (c != 0xD) {
line.push(String.fromCharCode(c))
}
}

})
})

req.pipe(child.stdin)
req.pipe(child.stdin)
}
}
}

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