string FileServer::parseResourcePath(const string& aResource, const websocketpp::http::parser::request& aRequest, StringPairList& headers_) const {
// Serve files only from the resource directory
if (aResource.empty() || aResource.find("..") != std::string::npos) {
throw RequestException(websocketpp::http::status_code::bad_request, "Invalid resource path");
}
auto request = aResource;
auto extension = getExtension(request);
if (!extension.empty()) {
dcassert(extension[0] != '.');
// We have compressed versions only for JS files
if (extension == "js" && aRequest.get_header("Accept-Encoding").find("gzip") != string::npos) {
request += ".gz";
// The Content-Encoding header will be set only after the file has been read successfully
// as gzip encoding shouldn't be used in case of errors...
}
if (extension != "html" && aResource != "/sw.js") {
// File versioning is done with hashes in filenames (except for the index file and service worker)
addCacheControlHeader(headers_, 365);
}
} else {
// Forward all requests for non-static files to index
// (but try to report API requests or other downloads with an invalid path)
if (aRequest.get_header("Accept").find("text/html") == string::npos) {
if (aRequest.get_header("Content-Type") == "application/json") {
throw RequestException(websocketpp::http::status_code::not_acceptable, "File server won't serve JSON files. Did you mean \"/api" + aResource + "\" instead?");
}
throw RequestException(websocketpp::http::status_code::not_found, "Invalid file path (hint: use \"Accept: text/html\" if you want index.html)");
}
request = "index.html";
// The main chunk name may change and it's stored in the HTML file
addCacheControlHeader(headers_, 0);
}
// Avoid double separators because of assertions
if (!request.empty() && request.front() == '/') {
request = request.substr(1);
}
// For windows
Util::replace(request, "/", PATH_SEPARATOR_STR);
return resourcePath + request;
}
websocketpp::http::status_code::value ApiRouter::handleHttpRequest(const string& aRequestPath,
const websocketpp::http::parser::request& aRequest, json& output_, json& error_,
bool aIsSecure, const string& aIp) noexcept {
SessionPtr session = nullptr;
auto token = aRequest.get_header("Authorization");
if (token != websocketpp::http::empty_header) {
session = WebServerManager::getInstance()->getUserManager().getSession(token);
}
auto& requestBody = aRequest.get_body();
dcdebug("Received HTTP request: %s\n", aRequest.get_body().c_str());
try {
ApiRequest apiRequest(aRequestPath, aRequest.get_method(), output_, error_);
apiRequest.validate();
apiRequest.parseHttpRequestJson(requestBody);
apiRequest.setSession(session);
return handleRequest(apiRequest, aIsSecure, nullptr, aIp);
} catch (const std::exception& e) {
error_ = { "message", "Parsing failed: " + string(e.what()) };
return websocketpp::http::status_code::bad_request;
}
return websocketpp::http::status_code::ok;
}
string FileServer::parseResourcePath(const string& aResource, const websocketpp::http::parser::request& aRequest, StringPairList& headers_) const noexcept {
auto request = aResource;
auto extension = getExtension(request);
if (!extension.empty()) {
// Strip the dot
extension = extension.substr(1);
// We have compressed versions only for JS files
if (extension == "js" && aRequest.get_header("Accept-Encoding").find("gzip") != string::npos) {
request += ".gz";
headers_.emplace_back("Content-Encoding", "gzip");
}
} else if (request.find("/build") != 0 && request != "/favicon.ico") {
// Forward all requests for non-static files to index
request = "/index.html";
}
// For windows
Util::replace(request, "/", PATH_SEPARATOR_STR);
return resourcePath + request;
}
websocketpp::http::status_code::value FileServer::handleGetRequest(const websocketpp::http::parser::request& aRequest,
string& output_, StringPairList& headers_, const SessionPtr& aSession) noexcept {
const auto& requestUrl = aRequest.get_uri();
dcdebug("Requesting file %s\n", requestUrl.c_str());
// Get the disk path
string filePath;
try {
if (requestUrl.length() >= 6 && requestUrl.compare(0, 6, "/view/") == 0) {
filePath = parseViewFilePath(requestUrl.substr(6), headers_, aSession);
} else {
filePath = parseResourcePath(requestUrl, aRequest, headers_);
}
} catch (const RequestException& e) {
output_ = e.what();
return e.getCode();
}
auto fileSize = File::getSize(filePath);
int64_t startPos = 0, endPos = fileSize - 1;
auto partialContent = parsePartialRange(aRequest.get_header("Range"), startPos, endPos);
// Read file
try {
File f(filePath, File::READ, File::OPEN);
f.setPos(startPos);
output_ = f.read(static_cast<size_t>(endPos) + 1);
} catch (const FileException& e) {
dcdebug("Failed to serve the file %s: %s\n", filePath.c_str(), e.getError().c_str());
output_ = e.getError();
return websocketpp::http::status_code::not_found;
} catch (const std::bad_alloc&) {
output_ = "Not enough memory on the server to serve this request";
return websocketpp::http::status_code::internal_server_error;
}
{
const auto ext = Util::getFileExt(filePath);
if (ext == ".nfo") {
string encoding;
// Platform-independent encoding conversion function could be added if there is more use for it
#ifdef _WIN32
encoding = "CP.437";
#else
encoding = "cp437";
#endif
output_ = Text::toUtf8(output_, encoding);
} else if (ext == ".gz" && aRequest.get_header("Accept-Encoding").find("gzip") != string::npos) {
headers_.emplace_back("Content-Encoding", "gzip");
}
}
{
// Get the mime type (but get it from the original request with gzipped content)
auto usingEncoding = find_if(headers_.begin(), headers_.end(), CompareFirst<string, string>("Content-Encoding")) != headers_.end();
auto type = getMimeType(usingEncoding ? requestUrl : filePath);
if (type) {
headers_.emplace_back("Content-Type", type);
}
}
if (partialContent) {
headers_.emplace_back("Content-Range", formatPartialRange(startPos, endPos, fileSize));
headers_.emplace_back("Accept-Ranges", "bytes");
return websocketpp::http::status_code::partial_content;
}
return websocketpp::http::status_code::ok;
}