/src/handler.js |
@@ -12,245 +12,255 @@ |
|
// Checks whether userPath is a child of rootPath. |
function isRooted(userPath, rootPath, separator, callback) { |
fs.realpath(userPath, (error, resolved) => { |
if (error) |
return false; |
resolved = resolved.split(separator).filter(Boolean); |
rootPath = rootPath.split(separator).filter(Boolean); |
callback(resolved.length >= rootPath.length && |
rootPath.every((e, i) => e === resolved[i])); |
}); |
userPath = userPath.split(separator).filter(Boolean); |
rootPath = rootPath.split(separator).filter(Boolean); |
callback(userPath.length >= rootPath.length && |
rootPath.every((e, i) => e === userPath[i])); |
} |
|
// Serves files. |
function files(config, request, response, requestPath, callback) { |
// Check if the file is accessible. |
fs.access(requestPath, fs.constants.R_OK, (error) => { |
if (error) { |
response.statusCode = 403; |
response.end(); |
return; |
} |
// Check if the file is accessible. |
fs.access(requestPath, fs.constants.R_OK, (error) => { |
if (error) { |
response.statusCode = 403; |
response.end(); |
return; |
} |
|
response.setHeader( |
'Content-Type', |
mime.lookup(requestPath) |
); |
response.setHeader( |
'Content-Type', |
mime.lookup(requestPath) |
); |
|
var readStream = fs.createReadStream(requestPath) |
.on('open', () => { |
response.statusCode = 200; |
readStream.pipe(response); |
}) |
.on('error', () => { |
response.statusCode = 500; |
response.end(); |
}); |
var readStream = fs.createReadStream(requestPath) |
.on('open', () => { |
response.statusCode = 200; |
readStream.pipe(response); |
}) |
.on('error', () => { |
response.statusCode = 500; |
response.end(); |
}); |
|
}); |
}); |
} |
|
// Serves a directory listing or the document index in case it exists. |
function index(config, request, response, requestPath, requestURL, callback) { |
const root = path.resolve(requestPath, config.site.index); |
fs.stat(root, (error, stats) => { |
if (error) { |
if (config.site.indexing |
.some((directory) => |
directory.toUpperCase() === requestURL.toUpperCase())) { |
fs.readdir(requestPath, (error, paths) => { |
if (error) { |
process.nextTick(() => { |
callback('Could not list directory: ' + |
requestPath, |
module.exports.error.level.ERROR |
); |
}); |
response.statusCode = 500; |
response.end(); |
return; |
} |
process.nextTick(() => { |
callback('Directory listing requested for: ' + |
requestPath, |
module.exports.error.level.INFO |
); |
}); |
response.statusCode = 200; |
response.write(JSON.stringify(paths)); |
response.end(); |
}); |
const root = path.resolve(requestPath, config.site.index); |
fs.stat(root, (error, stats) => { |
if (error) { |
if (config.site.indexing |
.some((directory) => |
directory.toUpperCase() === requestURL.toUpperCase())) { |
fs.readdir(requestPath, (error, paths) => { |
if (error) { |
process.nextTick(() => { |
callback('Could not list directory: ' + |
requestPath, |
module.exports.error.level.ERROR |
); |
}); |
response.statusCode = 500; |
response.end(); |
return; |
} |
process.nextTick(() => { |
callback('Directory listing requested for: ' + |
requestPath, |
module.exports.error.level.INFO |
); |
}); |
response.statusCode = 200; |
response.write(JSON.stringify(paths)); |
response.end(); |
}); |
|
return; |
} |
return; |
} |
|
// Could not access directory index file and directory listing not allowed. |
response.statusCode = 404; |
response.end(); |
return; |
// Could not access directory index file and directory listing not allowed. |
response.statusCode = 404; |
response.end(); |
return; |
|
} |
} |
|
// Serve the document index. |
fs.access(root, fs.constants.R_OK, (error) => { |
if (error) { |
process.nextTick(() => { |
callback('The server was unable to access the filesystem path: ' + |
requestPath, |
module.exports.error.level.WARN |
); |
}); |
response.statusCode = 403; |
response.end(); |
return; |
} |
// Serve the document index. |
fs.access(root, fs.constants.R_OK, (error) => { |
if (error) { |
process.nextTick(() => { |
callback('The server was unable to access the filesystem path: ' + |
requestPath, |
module.exports.error.level.WARN |
); |
}); |
response.statusCode = 403; |
response.end(); |
return; |
} |
|
// Set MIME content type. |
response.setHeader( |
'Content-Type', |
mime.lookup(root) |
); |
// Set MIME content type. |
response.setHeader( |
'Content-Type', |
mime.lookup(root) |
); |
|
var readStream = fs.createReadStream(root) |
.on('open', () => { |
response.statusCode = 200; |
readStream.pipe(response); |
}) |
.on('error', () => { |
response.statusCode = 500; |
response.end(); |
}); |
var readStream = fs.createReadStream(root) |
.on('open', () => { |
response.statusCode = 200; |
readStream.pipe(response); |
}) |
.on('error', () => { |
response.statusCode = 500; |
response.end(); |
}); |
|
}); |
}); |
}); |
}); |
} |
|
// Determines whether the requested filesystem request path is a directory or a file. |
function serve(config, request, response, requestPath, requestURL, callback) { |
fs.stat(requestPath, (error, stats) => { |
// Document does not exist. |
if (error) { |
response.statusCode = 404; |
response.end(); |
return; |
} |
fs.stat(requestPath, (error, stats) => { |
// Document does not exist. |
if (error) { |
response.statusCode = 404; |
response.end(); |
return; |
} |
|
if (stats.isDirectory()) { |
// Directory is requested so provide directory indexes. |
index(config, request, response, requestPath, requestURL, callback); |
return; |
} |
if (stats.isFile()) { |
const file = path.parse(requestPath).base; |
if (stats.isDirectory()) { |
// Directory is requested so provide directory indexes. |
index(config, request, response, requestPath, requestURL, callback); |
return; |
} |
if (stats.isFile()) { |
const file = path.parse(requestPath).base; |
|
// If the file matches the reject list or is not in the accept list, |
// then there is no file to serve. |
if (config.site.reject.some((expression) => expression.test(file)) || |
!config.site.accept.some((expression) => expression.test(file))) { |
response.statusCode = 404; |
response.end(); |
return; |
} |
// If the file matches the reject list or is not in the accept list, |
// then there is no file to serve. |
if (config.site.reject.some((expression) => expression.test(file)) || |
!config.site.accept.some((expression) => expression.test(file))) { |
response.statusCode = 404; |
response.end(); |
return; |
} |
|
// A file was requested so provide the file. |
files(config, request, response, requestPath, callback); |
} |
}); |
// A file was requested so provide the file. |
files(config, request, response, requestPath, callback); |
} |
}); |
} |
|
module.exports = { |
error: { |
level: { |
INFO: 1, |
WARN: 2, |
ERROR: 3 |
} |
}, |
process: (config, request, response, root, callback) => { |
process.nextTick(() => { |
const requestAddress = request.socket.address(); |
const requestURL = url.parse( |
request.url, true |
); |
error: { |
level: { |
INFO: 1, |
WARN: 2, |
ERROR: 3 |
} |
}, |
process: (config, request, response, root, callback) => { |
process.nextTick(() => { |
const requestAddress = request.socket.address(); |
const requestURL = url.parse( |
request.url, true |
); |
|
const trimmedPath = requestURL |
.pathname |
.split('/') |
.filter(Boolean) |
.join('/'); |
const requestPath = trimmedPath === '/' ? |
path.join(root, trimmedPath) : |
path.resolve(root, trimmedPath); |
const trimmedPath = requestURL |
.pathname |
.split('/') |
.filter(Boolean) |
.join('/'); |
const requestPath = trimmedPath === '/' ? |
path.join(root, trimmedPath) : |
path.resolve(root, trimmedPath); |
|
// Check for path traversals early on and bail if the requested path does not |
// lie within the specified document root. |
isRooted(requestPath, root, path.sep, (rooted) => { |
if (!rooted) { |
process.nextTick(() => { |
callback('Attempted path traversal: ' + |
requestAddress.address + ':' + |
requestAddress.port + |
' requesting: ' + |
requestURL.pathname, |
module.exports.error.level.WARN |
); |
}); |
response.statusCode = 404; |
response.end(); |
return; |
} |
fs.realpath(requestPath, (error, resolvedPath) => { |
if (error) { |
callback('Unknown path requested: ' + |
requestAddress.address + ':' + |
requestAddress.port + |
' requesting: ' + |
requestURL.pathname, |
module.exports.error.level.WARN |
); |
response.statusCode = 404; |
response.end(); |
return; |
} |
// Check for path traversals early on and bail if the requested path does not |
// lie within the specified document root. |
isRooted(resolvedPath, root, path.sep, (rooted) => { |
if (!rooted) { |
process.nextTick(() => { |
callback('Attempted path traversal: ' + |
requestAddress.address + ':' + |
requestAddress.port + |
' requesting: ' + |
requestURL.pathname, |
module.exports.error.level.WARN |
); |
}); |
response.statusCode = 404; |
response.end(); |
return; |
} |
|
// If authentication is required for this path then perform authentication. |
if (config.auth.locations.some( |
(authPath) => authPath.toUpperCase() === requestURL.pathname.toUpperCase())) { |
// Create digest authentication. |
const authentication = auth.digest({ |
realm: config.auth.realm, |
file: path.resolve( |
path.dirname(require.main.filename), |
config.auth.digest |
) |
}); |
// Requested location requires authentication. |
authentication.check(request, response, (request, response) => { |
process.nextTick(() => { |
callback('Authenticated client: ' + |
requestAddress.address + ':' + |
requestAddress.port + |
' accessing: ' + |
requestURL.pathname, |
module.exports.error.level.INFO |
); |
}); |
serve(config, |
request, |
response, |
requestPath, |
requestURL.pathname, |
callback |
); |
}); |
return; |
} |
// If authentication is required for this path then perform authentication. |
if (config.auth.locations.some( |
(authPath) => authPath.toUpperCase() === requestURL.pathname.toUpperCase())) { |
// Create digest authentication. |
const authentication = auth.digest({ |
realm: config.auth.realm, |
file: path.resolve( |
path.dirname(require.main.filename), |
config.auth.digest |
) |
}); |
// Requested location requires authentication. |
authentication.check(request, response, (request, response) => { |
process.nextTick(() => { |
callback('Authenticated client: ' + |
requestAddress.address + ':' + |
requestAddress.port + |
' accessing: ' + |
requestURL.pathname, |
module.exports.error.level.INFO |
); |
}); |
serve(config, |
request, |
response, |
requestPath, |
requestURL.pathname, |
callback |
); |
}); |
return; |
} |
|
// If no authentication is required then serve the request. |
process.nextTick(() => { |
callback('Client: ' + |
requestAddress.address + ':' + |
requestAddress.port + |
' accessing: ' + |
requestURL.pathname, |
module.exports.error.level.INFO |
); |
}); |
serve(config, |
request, |
response, |
requestPath, |
requestURL.pathname, |
callback |
); |
}); |
}); |
} |
// If no authentication is required then serve the request. |
process.nextTick(() => { |
callback('Client: ' + |
requestAddress.address + ':' + |
requestAddress.port + |
' accessing: ' + |
requestURL.pathname, |
module.exports.error.level.INFO |
); |
}); |
serve(config, |
request, |
response, |
requestPath, |
requestURL.pathname, |
callback |
); |
}); |
}); |
}); |
} |
}; |