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FileServer.cpp
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* Copyright the Collabora Online contributors.
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <config.h>
#include <config_version.h>
#include "FileServer.hpp"
#include "Auth.hpp"
#include "COOLWSD.hpp"
#include "Exceptions.hpp"
#include "FileUtil.hpp"
#include "HttpRequest.hpp"
#include "RequestDetails.hpp"
#include "ServerURL.hpp"
#include <Common.hpp>
#include <Crypto.hpp>
#include <Log.hpp>
#include <Protocol.hpp>
#include <Util.hpp>
#include <JsonUtil.hpp>
#include <common/ConfigUtil.hpp>
#include <common/LangUtil.hpp>
#if !MOBILEAPP
#include <net/HttpHelper.hpp>
#endif
#include <ContentSecurityPolicy.hpp>
#include <Poco/DateTime.h>
#include <Poco/DateTimeFormat.h>
#include <Poco/DateTimeFormatter.h>
#include <Poco/Exception.h>
#include <Poco/FileStream.h>
#include <Poco/MemoryStream.h>
#include <Poco/Net/HTMLForm.h>
#include <Poco/Net/HTTPBasicCredentials.h>
#include <Poco/Net/HTTPCookie.h>
#include <Poco/Net/HTTPRequest.h>
#include <Poco/Net/HTTPResponse.h>
#include <Poco/Net/NameValueCollection.h>
#include <Poco/Net/NetException.h>
#include <Poco/RegularExpression.h>
#include <Poco/Runnable.h>
#include <Poco/SHA1Engine.h>
#include <Poco/StreamCopier.h>
#include <Poco/URI.h>
#include <Poco/Util/LayeredConfiguration.h>
#include <chrono>
#include <iomanip>
#include <string>
#include <vector>
#include <dirent.h>
#include <sys/stat.h>
#include <unistd.h>
#include <zlib.h>
#include <security/pam_appl.h>
#include <openssl/evp.h>
using Poco::Net::HTMLForm;
using Poco::Net::HTTPRequest;
using Poco::Net::NameValueCollection;
using Poco::Util::Application;
std::map<std::string, std::pair<std::string, std::string>> FileServerRequestHandler::FileHash;
// We have files that are at least 2.5 MB already.
constexpr auto MaxFileSizeToCacheInBytes = 5 * 1024 * 1024;
namespace
{
int functionConversation(int /*num_msg*/, const struct pam_message** /*msg*/,
struct pam_response **reply, void *appdata_ptr)
{
*reply = (struct pam_response *)malloc(sizeof(struct pam_response));
(*reply)[0].resp = strdup(static_cast<char *>(appdata_ptr));
(*reply)[0].resp_retcode = 0;
return PAM_SUCCESS;
}
/// Use PAM to check for user / password.
bool isPamAuthOk(const std::string& userProvidedUsr, const std::string& userProvidedPwd)
{
struct pam_conv localConversation { functionConversation, nullptr };
pam_handle_t *localAuthHandle = NULL;
int retval;
localConversation.appdata_ptr = const_cast<char *>(userProvidedPwd.c_str());
retval = pam_start("coolwsd", userProvidedUsr.c_str(), &localConversation, &localAuthHandle);
if (retval != PAM_SUCCESS)
{
LOG_ERR("pam_start returned " << retval);
return false;
}
retval = pam_authenticate(localAuthHandle, 0);
if (retval != PAM_SUCCESS)
{
if (retval == PAM_AUTH_ERR)
{
LOG_ERR("PAM authentication failure for user \"" << userProvidedUsr << "\".");
}
else
{
LOG_ERR("pam_authenticate returned " << retval);
}
return false;
}
LOG_INF("PAM authentication success for user \"" << userProvidedUsr << "\".");
retval = pam_end(localAuthHandle, retval);
if (retval != PAM_SUCCESS)
{
LOG_ERR("pam_end returned " << retval);
}
return true;
}
/// Check for user / password set in coolwsd.xml.
bool isConfigAuthOk(const std::string& userProvidedUsr, const std::string& userProvidedPwd)
{
const auto& config = Application::instance().config();
const std::string& user = config.getString("admin_console.username", "");
// Check for the username
if (user.empty())
{
LOG_ERR("Admin Console username missing, admin console disabled.");
return false;
}
else if (user != userProvidedUsr)
{
LOG_ERR("Admin Console wrong username.");
return false;
}
const char useCoolconfig[] = " Use coolconfig to configure the admin password.";
// do we have secure_password?
if (config.has("admin_console.secure_password"))
{
const std::string securePass = config.getString("admin_console.secure_password", "");
if (securePass.empty())
{
LOG_ERR("Admin Console secure password is empty, denying access." << useCoolconfig);
return false;
}
#if HAVE_PKCS5_PBKDF2_HMAC
// Extract the salt from the config
std::vector<unsigned char> saltData;
StringVector tokens = StringVector::tokenize(securePass, '.');
if (tokens.size() != 5 ||
!tokens.equals(0, "pbkdf2") ||
!tokens.equals(1, "sha512") ||
!Util::dataFromHexString(tokens[3], saltData))
{
LOG_ERR("Incorrect format detected for secure_password in config file." << useCoolconfig);
return false;
}
unsigned char userProvidedPwdHash[tokens[4].size() / 2];
PKCS5_PBKDF2_HMAC(userProvidedPwd.c_str(), -1,
saltData.data(), saltData.size(),
std::stoi(tokens[2]),
EVP_sha512(),
sizeof userProvidedPwdHash, userProvidedPwdHash);
std::stringstream stream;
for (unsigned long j = 0; j < sizeof userProvidedPwdHash; ++j)
stream << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(userProvidedPwdHash[j]);
// now compare the hashed user-provided pwd against the stored hash
return tokens.equals(4, stream.str());
#else
const std::string pass = config.getString("admin_console.password", "");
LOG_ERR("The config file has admin_console.secure_password setting, "
<< "but this application was compiled with old OpenSSL version, "
<< "and this setting cannot be used." << (!pass.empty()? " Falling back to plain text password.": ""));
// careful, a fall-through!
#endif
}
const std::string pass = config.getString("admin_console.password", "");
if (pass.empty())
{
LOG_ERR("Admin Console password is empty, denying access." << useCoolconfig);
return false;
}
return pass == userProvidedPwd;
}
std::string stringifyBoolFromConfig(const Poco::Util::LayeredConfiguration& config,
const std::string& propertyName, bool defaultValue)
{
return config.getBool(propertyName, defaultValue) ? "true" : "false";
}
} // namespace
FileServerRequestHandler::FileServerRequestHandler(const std::string& root)
{
// Read all files that we can serve into memory and compress them.
// cool files
try
{
readDirToHash(root, "/browser/dist");
}
catch (...)
{
LOG_ERR("Failed to read from directory " << root);
}
}
FileServerRequestHandler::~FileServerRequestHandler()
{
// Clean cached files.
FileHash.clear();
}
bool FileServerRequestHandler::isAdminLoggedIn(const Poco::Net::HTTPRequest& request,
std::string& jwtToken)
{
assert(COOLWSD::AdminEnabled);
try
{
NameValueCollection cookies;
request.getCookies(cookies);
jwtToken = cookies.get("jwt");
LOG_INF("Verifying JWT token: " << jwtToken);
JWTAuth authAgent("admin", "admin", "admin");
if (authAgent.verify(jwtToken))
{
LOG_TRC("JWT token is valid");
return true;
}
LOG_INF("Invalid JWT token, let the administrator re-login");
}
catch (const Poco::Exception& exc)
{
LOG_INF("No existing JWT cookie found");
}
return false;
}
bool FileServerRequestHandler::authenticateAdmin(const Poco::Net::HTTPBasicCredentials& credentials,
http::Response& response, std::string& jwtToken)
{
assert(COOLWSD::AdminEnabled);
const std::string& userProvidedUsr = credentials.getUsername();
const std::string& userProvidedPwd = credentials.getPassword();
// Deny attempts to login without providing a username / pwd and fail right away
// We don't even want to allow a password-less PAM module to be used here,
// or anything.
if (userProvidedUsr.empty() || userProvidedPwd.empty())
{
LOG_ERR("An attempt to log into Admin Console without username or password.");
return false;
}
// Check if the user is allowed to use the admin console
if (COOLWSD::getConfigValue<bool>("admin_console.enable_pam", false))
{
// use PAM - it needs the username too
if (!isPamAuthOk(userProvidedUsr, userProvidedPwd))
return false;
}
else
{
// use the hash or password in the config file
if (!isConfigAuthOk(userProvidedUsr, userProvidedPwd))
return false;
}
// authentication passed, generate and set the cookie
JWTAuth authAgent("admin", "admin", "admin");
jwtToken = authAgent.getAccessToken();
Poco::Net::HTTPCookie cookie("jwt", jwtToken);
// bundlify appears to add an extra /dist -> dist/dist/admin
cookie.setPath(COOLWSD::ServiceRoot + "/browser/dist/");
cookie.setSecure(COOLWSD::isSSLEnabled());
response.header().addCookie(cookie.toString());
return true;
}
bool FileServerRequestHandler::isAdminLoggedIn(const HTTPRequest& request, http::Response& response)
{
std::string jwtToken;
return isAdminLoggedIn(request, jwtToken) ||
authenticateAdmin(Poco::Net::HTTPBasicCredentials(request), response, jwtToken);
}
#if ENABLE_DEBUG
// Represents basic file's attributes.
// Used for localFile
class LocalFileInfo
{
public:
// Attributes of file
std::string localPath;
std::string fileName;
std::string size;
// Last modified time of the file
std::chrono::system_clock::time_point fileLastModifiedTime;
enum class COOLStatusCode
{
DocChanged = 1010 // Document changed externally in storage
};
std::string getLastModifiedTime()
{
return Util::getIso8601FracformatTime(fileLastModifiedTime);
}
LocalFileInfo() = delete;
LocalFileInfo(const std::string &lPath, const std::string &fName)
{
fileName = fName;
localPath = lPath;
const FileUtil::Stat stat(localPath);
size = std::to_string(stat.size());
fileLastModifiedTime = stat.modifiedTimepoint();
}
private:
// Internal tracking of known files: to store various data
// on files - rather than writing it back to the file-system.
static std::vector<std::shared_ptr<LocalFileInfo>> fileInfoVec;
public:
// Lookup a file in our file-list
static std::shared_ptr<LocalFileInfo> getOrCreateFile(const std::string &lpath, const std::string &fname)
{
auto it = std::find_if(fileInfoVec.begin(), fileInfoVec.end(), [&lpath](const std::shared_ptr<LocalFileInfo> obj)
{
return obj->localPath == lpath;
});
if (it != fileInfoVec.end())
return *it;
auto fileInfo = std::make_shared<LocalFileInfo>(lpath, fname);
fileInfoVec.emplace_back(fileInfo);
return fileInfo;
}
};
std::atomic<unsigned> lastLocalId;
std::vector<std::shared_ptr<LocalFileInfo>> LocalFileInfo::fileInfoVec;
//handles request starts with /wopi/files
void handleWopiRequest(const HTTPRequest& request,
const RequestDetails &requestDetails,
Poco::MemoryInputStream& message,
const std::shared_ptr<StreamSocket>& socket)
{
Poco::URI requestUri(request.getURI());
const Poco::Path path = requestUri.getPath();
const std::string prefix = "/wopi/files";
const std::string suffix = "/contents";
std::string localPath;
if (path.toString().ends_with(suffix))
{
localPath = path.toString().substr(prefix.length(), path.toString().length() - prefix.length() - suffix.length());
}
else
{
localPath = path.toString().substr(prefix.length());
}
if (!FileUtil::Stat(localPath).exists())
{
LOG_ERR("Local file URI [" << localPath << "] invalid or doesn't exist.");
throw BadRequestException("Invalid URI: " + localPath);
}
if (request.getMethod() == "GET" && !path.toString().ends_with(suffix))
{
std::shared_ptr<LocalFileInfo> localFile =
LocalFileInfo::getOrCreateFile(localPath, path.getFileName());
std::string userId = std::to_string(lastLocalId++);
std::string userNameString = "LocalUser#" + userId;
Poco::JSON::Object::Ptr fileInfo = new Poco::JSON::Object();
std::string postMessageOrigin;
config::isSslEnabled() ? postMessageOrigin = "https://" : postMessageOrigin = "http://";
postMessageOrigin += requestDetails.getHostUntrusted();
fileInfo->set("BaseFileName", localFile->fileName);
fileInfo->set("Size", localFile->size);
fileInfo->set("Version", "1.0");
fileInfo->set("OwnerId", "test");
fileInfo->set("UserId", userId);
fileInfo->set("UserFriendlyName", userNameString);
fileInfo->set("UserCanWrite", (requestDetails.getParam("permission") != "readonly") ? "true": "false");
fileInfo->set("PostMessageOrigin", postMessageOrigin);
fileInfo->set("LastModifiedTime", localFile->getLastModifiedTime());
fileInfo->set("EnableOwnerTermination", "true");
std::ostringstream jsonStream;
fileInfo->stringify(jsonStream);
http::Response httpResponse(http::StatusCode::OK);
FileServerRequestHandler::hstsHeaders(httpResponse);
httpResponse.set("Last-Modified", Util::getHttpTime(localFile->fileLastModifiedTime));
httpResponse.setBody(jsonStream.str(), "application/json; charset=utf-8");
socket->send(httpResponse);
return;
}
else if(request.getMethod() == "GET" && path.toString().ends_with(suffix))
{
std::shared_ptr<LocalFileInfo> localFile =
LocalFileInfo::getOrCreateFile(localPath,path.getFileName());
auto ss = std::ostringstream{};
std::ifstream inputFile(localFile->localPath);
ss << inputFile.rdbuf();
http::Response httpResponse(http::StatusCode::OK);
FileServerRequestHandler::hstsHeaders(httpResponse);
httpResponse.set("Last-Modified", Util::getHttpTime(localFile->fileLastModifiedTime));
httpResponse.setBody(ss.str(), "text/plain; charset=utf-8");
socket->send(httpResponse);
return;
}
else if (request.getMethod() == "POST" && path.toString().ends_with(suffix))
{
std::shared_ptr<LocalFileInfo> localFile =
LocalFileInfo::getOrCreateFile(localPath,path.getFileName());
std::string wopiTimestamp = request.get("X-COOL-WOPI-Timestamp", std::string());
if (wopiTimestamp.empty())
wopiTimestamp = request.get("X-LOOL-WOPI-Timestamp", std::string());
if (!wopiTimestamp.empty())
{
if (wopiTimestamp != localFile->getLastModifiedTime())
{
http::Response httpResponse(http::StatusCode::Conflict);
httpResponse.setBody("{\"COOLStatusCode\":" +
std::to_string(static_cast<int>(
LocalFileInfo::COOLStatusCode::DocChanged)) +
',' + "{\"LOOLStatusCode\":" +
std::to_string(static_cast<int>(
LocalFileInfo::COOLStatusCode::DocChanged)) +
'}',
"application/json; charset=utf-8");
socket->send(httpResponse);
return;
}
}
std::streamsize size = request.getContentLength();
std::vector<char> buffer(size);
message.read(buffer.data(), size);
localFile->fileLastModifiedTime = std::chrono::system_clock::now();
std::ofstream outfile;
outfile.open(localFile->localPath, std::ofstream::binary);
outfile.write(buffer.data(), size);
outfile.close();
const std::string body = "{\"LastModifiedTime\": \"" +
localFile->getLastModifiedTime() + "\" }";
http::Response httpResponse(http::StatusCode::OK);
FileServerRequestHandler::hstsHeaders(httpResponse);
httpResponse.setBody(body, "application/json; charset=utf-8");
socket->send(httpResponse);
return;
}
}
#endif
void FileServerRequestHandler::handleRequest(const HTTPRequest& request,
const RequestDetails& requestDetails,
Poco::MemoryInputStream& message,
const std::shared_ptr<StreamSocket>& socket,
ResourceAccessDetails& accessDetails)
{
try
{
bool noCache = false;
#if ENABLE_DEBUG
noCache = !COOLWSD::ForceCaching; // for cypress
#endif
http::Response response(http::StatusCode::OK);
hstsHeaders(response);
const auto& config = Application::instance().config();
Poco::URI requestUri(request.getURI());
LOG_TRC("Fileserver request: " << requestUri.toString());
requestUri.normalize(); // avoid .'s and ..'s
if (requestUri.getPath().find("browser/" COOLWSD_VERSION_HASH "/") == std::string::npos &&
requestUri.getPath().find("admin/") == std::string::npos)
{
LOG_WRN("Client - server version mismatch, disabling browser cache. "
"Expected: " COOLWSD_VERSION_HASH "; Actual URI path with version hash: "
<< requestUri.getPath());
noCache = true;
}
std::vector<std::string> requestSegments;
requestUri.getPathSegments(requestSegments);
if (requestSegments.size() < 1)
throw Poco::FileNotFoundException("Invalid URI request: [" + requestUri.toString() + "].");
const std::string relPath = getRequestPathname(request, requestDetails);
const std::string endPoint = requestSegments[requestSegments.size() - 1];
static std::string etagString = "\"" COOLWSD_VERSION_HASH +
config.getString("ver_suffix", "") + "\"";
#if ENABLE_DEBUG
if (relPath.starts_with("/wopi/files")) {
handleWopiRequest(request, requestDetails, message, socket);
return;
}
#endif
if (request.getMethod() == HTTPRequest::HTTP_POST && endPoint == "logging.html")
{
const std::string coolLogging = config.getString("browser_logging", "false");
if (coolLogging != "false")
{
std::string token;
Poco::SHA1Engine engine;
engine.update(COOLWSD::LogToken);
std::getline(message, token, ' ');
if (Poco::DigestEngine::digestToHex(engine.digest()) == token)
{
LOG_ERR(message.rdbuf());
http::Response httpResponse(http::StatusCode::OK);
FileServerRequestHandler::hstsHeaders(httpResponse);
socket->send(httpResponse);
return;
}
}
}
// Is this a file we read at startup - if not; it's not for serving.
if (FileHash.find(relPath) == FileHash.end() &&
FileHash.find(relPath + ".br") == FileHash.end())
throw Poco::FileNotFoundException("Invalid URI request: [" + requestUri.toString() + "].");
if (endPoint == "welcome.html")
{
preprocessWelcomeFile(request, response, requestDetails, message, socket);
return;
}
if (endPoint == "cool.html" ||
endPoint == "help-localizations.json" ||
endPoint == "localizations.json" ||
endPoint == "locore-localizations.json" ||
endPoint == "uno-localizations.json" ||
endPoint == "uno-localizations-override.json")
{
accessDetails = preprocessFile(request, response, requestDetails, message, socket);
return;
}
if (request.getMethod() == HTTPRequest::HTTP_GET)
{
if (endPoint == "admin.html" || endPoint == "adminSettings.html" ||
endPoint == "adminHistory.html" || endPoint == "adminAnalytics.html" ||
endPoint == "adminLog.html" || endPoint == "adminClusterOverview.html" ||
endPoint == "adminClusterOverviewAbout.html")
{
preprocessAdminFile(request, response, requestDetails, socket);
return;
}
if (endPoint == "admin-bundle.js" ||
endPoint == "admin-localizations.js")
{
noCache = true;
if (!COOLWSD::AdminEnabled)
throw Poco::FileAccessDeniedException("Admin console disabled");
if (!FileServerRequestHandler::isAdminLoggedIn(request, response))
throw Poco::Net::NotAuthenticatedException("Invalid admin login");
// Ask UAs to block if they detect any XSS attempt
response.add("X-XSS-Protection", "1; mode=block");
// No referrer-policy
response.add("Referrer-Policy", "no-referrer");
}
// Do we have an extension.
const std::size_t extPoint = endPoint.find_last_of('.');
if (extPoint == std::string::npos)
throw Poco::FileNotFoundException("Invalid file.");
const std::string fileType = endPoint.substr(extPoint + 1);
std::string mimeType;
if (fileType == "js")
mimeType = "application/javascript";
else if (fileType == "css")
mimeType = "text/css";
else if (fileType == "html")
mimeType = "text/html";
else if (fileType == "png")
mimeType = "image/png";
else if (fileType == "svg")
mimeType = "image/svg+xml";
#if !MOBILEAPP
else if (fileType == "wasm" &&
COOLWSD::WASMState != COOLWSD::WASMActivationState::Disabled)
mimeType = "application/wasm";
#endif // !MOBILEAPP
else
mimeType = "text/plain";
response.setContentType(mimeType);
auto it = request.find("If-None-Match");
if (it != request.end())
{
// if ETags match avoid re-sending the file.
if (!noCache && it->second == etagString)
{
// TESTME: harder ... - do we even want ETag support ?
std::ostringstream oss;
Poco::DateTime now;
Poco::DateTime later(now.utcTime(), int64_t(1000)*1000 * 60 * 60 * 24 * 128);
std::string extraHeaders =
"Expires: " + Poco::DateTimeFormatter::format(
later, Poco::DateTimeFormat::HTTP_FORMAT) + "\r\n" +
"Cache-Control: max-age=11059200\r\n";
HttpHelper::sendErrorAndShutdown(http::StatusCode::NotModified, socket,
std::string(), extraHeaders);
return;
}
}
#if !MOBILEAPP
if (COOLWSD::WASMState != COOLWSD::WASMActivationState::Disabled &&
relPath.find("wasm") != std::string::npos)
{
response.add("Cross-Origin-Opener-Policy", "same-origin");
response.add("Cross-Origin-Embedder-Policy", "require-corp");
response.add("Cross-Origin-Resource-Policy", "cross-origin");
}
#endif // !MOBILEAPP
const bool brotli = request.hasToken("Accept-Encoding", "br");
#if ENABLE_DEBUG
if (std::getenv("COOL_SERVE_FROM_FS"))
{
// Useful to not serve from memory sometimes especially during cool development
// Avoids having to restart cool everytime you make a change in cool
std::string filePath =
Poco::Path(COOLWSD::FileServerRoot, relPath).absolute().toString();
if (brotli && FileUtil::Stat(filePath + ".br").exists())
{
filePath += ".br";
response.set("Content-Encoding", "br");
}
HttpHelper::sendFileAndShutdown(socket, filePath, response, noCache);
return;
}
#endif
bool compressed = false;
const std::string* content;
if (brotli && FileHash.find(relPath + ".br") != FileHash.end())
{
compressed = true;
response.set("Content-Encoding", "br");
content = getUncompressedFile(relPath + ".br");
}
else if (request.hasToken("Accept-Encoding", "gzip"))
{
compressed = true;
response.set("Content-Encoding", "gzip");
content = getCompressedFile(relPath);
}
else
content = getUncompressedFile(relPath);
response.add("Content-Length", std::to_string(content->size()));
response.add("Connection", "close");
if (!noCache)
{
// 60 * 60 * 24 * 128 (days) = 11059200
response.set("Cache-Control", "max-age=11059200");
response.set("ETag", etagString);
}
response.add("X-Content-Type-Options", "nosniff");
LOG_TRC('#' << socket->getFD() << ": Sending " << (!compressed ? "un" : "")
<< "compressed : file [" << relPath << "]: " << response.header());
socket->send(response);
socket->send(*content);
// shutdown by caller
}
}
catch (const Poco::Net::NotAuthenticatedException& exc)
{
LOG_ERR("FileServerRequestHandler::NotAuthenticated: " << exc.displayText());
sendError(http::StatusCode::Unauthorized, request, socket, "", "",
"WWW-authenticate: Basic realm=\"online\"\r\n");
}
catch (const Poco::FileAccessDeniedException& exc)
{
LOG_ERR("FileServerRequestHandler: " << exc.displayText());
sendError(http::StatusCode::Forbidden, request, socket, "403 - Access denied!",
"You are unable to access");
}
catch (const Poco::FileNotFoundException& exc)
{
LOG_ERR("FileServerRequestHandler: " << exc.displayText());
sendError(http::StatusCode::NotFound, request, socket, "404 - file not found!",
"There seems to be a problem locating");
}
catch (Poco::SyntaxException& exc)
{
LOG_ERR("Incorrect config value: " << exc.displayText());
sendError(http::StatusCode::InternalServerError, request, socket,
"500 - Internal Server Error!",
"Cannot process the request - " + exc.displayText());
}
}
void FileServerRequestHandler::sendError(http::StatusCode errorCode,
const Poco::Net::HTTPRequest& request,
const std::shared_ptr<StreamSocket>& socket,
const std::string& shortMessage,
const std::string& longMessage,
const std::string& extraHeader)
{
std::string body;
std::string headers = extraHeader;
if (!shortMessage.empty())
{
const Poco::URI requestUri(request.getURI());
const std::string pathSanitized =
Util::encodeURIComponent(requestUri.getPath(), std::string());
// Let's keep message as plain text to avoid complications.
headers += "Content-Type: text/plain charset=UTF-8\r\n";
body = "Error: " + shortMessage + '\n' +
longMessage + ' ' + pathSanitized + '\n' +
"Please contact your system administrator.";
}
HttpHelper::sendError(errorCode, socket, body, headers);
}
void FileServerRequestHandler::readDirToHash(const std::string &basePath, const std::string &path, const std::string &prefix)
{
const std::string fullPath = basePath + path;
LOG_DBG("Caching files in [" << fullPath << ']');
#if !MOBILEAPP
if (COOLWSD::WASMState == COOLWSD::WASMActivationState::Disabled &&
path.find("wasm") != std::string::npos)
{
LOG_INF("Skipping [" << fullPath << "] as WASM is disabled");
return;
}
#endif // !MOBILEAPP
DIR* workingdir = opendir((fullPath).c_str());
if (!workingdir)
{
LOG_SYS("Failed to open directory [" << fullPath << ']');
return;
}
size_t fileCount = 0;
std::string filesRead;
filesRead.reserve(1024);
struct dirent *currentFile;
while ((currentFile = readdir(workingdir)) != nullptr)
{
if (currentFile->d_name[0] == '.')
continue;
const std::string relPath = path + '/' + currentFile->d_name;
struct stat fileStat;
if (stat ((basePath + relPath).c_str(), &fileStat) != 0)
{
LOG_ERR("Failed to stat " << relPath);
continue;
}
if (S_ISDIR(fileStat.st_mode))
readDirToHash(basePath, relPath);
else if (S_ISREG(fileStat.st_mode) && relPath.ends_with(".br"))
{
// Only cache without compressing.
fileCount++;
filesRead.append(currentFile->d_name);
filesRead += ' ';
std::string uncompressedFile;
FileUtil::readFile(basePath + relPath, uncompressedFile);
FileHash.emplace(prefix + relPath,
std::make_pair(std::move(uncompressedFile), std::string()));
}
else if (S_ISREG(fileStat.st_mode))
{
std::string uncompressedFile;
const ssize_t size =
FileUtil::readFile(basePath + relPath, uncompressedFile, MaxFileSizeToCacheInBytes);
assert(size < MaxFileSizeToCacheInBytes && "MaxFileSizeToCacheInBytes is too small for "
"static-file serving; please increase it");
if (size <= 0)
{
assert(uncompressedFile.empty() &&
"Unexpected data in uncompressedFile after failed read");
if (size < 0)
{
LOG_ERR("Failed to read file [" << basePath + relPath
<< "] or is too large to cache and serve");
}
// Always add the entry, even if the contents are empty.
FileHash.emplace(prefix + relPath,
std::make_pair(std::move(uncompressedFile), std::string()));
continue;
}
z_stream strm;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
const int initResult = deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 31, 8, Z_DEFAULT_STRATEGY);
if (initResult != Z_OK)
{
LOG_ERR("Failed to deflateInit2 for file [" << basePath + relPath
<< "], result: " << initResult);
// Add the uncompressed version; it's better to serve uncompressed than nothing at all.
FileHash.emplace(prefix + relPath,
std::make_pair(std::move(uncompressedFile), std::string()));
continue;
}
fileCount++;
filesRead.append(currentFile->d_name);
filesRead += ' ';
// Compress.
assert(size > 0 && "No data to compress");
assert(!uncompressedFile.empty() && "Unexpected empty uncompressedFile");
std::string compressedFile;
const long unsigned int compSize = compressBound(size);
compressedFile.resize(compSize);
strm.next_in = (unsigned char*)&uncompressedFile[0];
strm.avail_in = size;
strm.avail_out = compSize;
strm.next_out = (unsigned char*)&compressedFile[0];
strm.total_out = strm.total_in = 0;
const int deflateResult = deflate(&strm, Z_FINISH);
if (deflateResult != Z_OK && deflateResult != Z_STREAM_END)
{
LOG_ERR("Failed to deflate [" << basePath + relPath
<< "], result: " << deflateResult);
compressedFile.clear(); // Can't trust the compressed data, if any.
}
else
{
compressedFile.resize(compSize - strm.avail_out);
}
FileHash.emplace(prefix + relPath, std::make_pair(std::move(uncompressedFile),
std::move(compressedFile)));
deflateEnd(&strm);
}
}
closedir(workingdir);
if (fileCount > 0)
LOG_TRC("Pre-read " << fileCount << " file(s) from directory: " << fullPath << ": "
<< filesRead);
}
const std::string *FileServerRequestHandler::getCompressedFile(const std::string &path)
{
// If a compressed version is not available, return the original uncompressed data.
const auto& pair = FileHash[path];
return pair.second.empty() ? &pair.first : &pair.second;
}
const std::string *FileServerRequestHandler::getUncompressedFile(const std::string &path)
{
return &FileHash[path].first;
}
std::string FileServerRequestHandler::getRequestPathname(const HTTPRequest& request,
const RequestDetails& requestDetails)
{
Poco::URI requestUri(request.getURI());
// avoid .'s and ..'s
requestUri.normalize();
std::string path(requestUri.getPath());
Poco::RegularExpression gitHashRe("/([0-9a-f]+)/");
std::string gitHash;
if (gitHashRe.extract(path, gitHash))
{
// Convert version back to a real file name.
Poco::replaceInPlace(path, std::string("/browser" + gitHash), std::string("/browser/dist/"));
}
#if !MOBILEAPP
bool isWasm = false;
#if ENABLE_DEBUG
if (COOLWSD::WASMState == COOLWSD::WASMActivationState::Forced)
{
isWasm = (path.find("/browser/dist/wasm/") == std::string::npos);
}
else
#endif
{
const std::string wopiSrc = requestDetails.getLineModeKey(std::string());
if (!wopiSrc.empty())
{
const auto it = COOLWSD::Uri2WasmModeMap.find(wopiSrc);
if (it != COOLWSD::Uri2WasmModeMap.end())
{
const bool isRecent =
(std::chrono::steady_clock::now() - it->second) <= std::chrono::minutes(1);
isWasm = (isRecent && path.find("/browser/dist/wasm/") == std::string::npos);
// Clean up only after it expires, because we need it more than once.
if (!isRecent)
{
COOLWSD::Uri2WasmModeMap.erase(it);
}
}
}
}
if (!isWasm)
{
std::vector<std::string> requestSegments;
requestUri.getPathSegments(requestSegments);
const std::string endPoint = requestSegments[requestSegments.size() - 1];
if (endPoint == "online.js" || endPoint == "online.worker.js" ||
endPoint == "online.wasm" || endPoint == "online.data" || endPoint == "soffice.data")
{
isWasm = true;
}
else if (endPoint == "online.wasm.debug.wasm" || endPoint == "soffice.data.js.metadata")
{
isWasm = true;
}
}
if (isWasm)
{
Poco::replaceInPlace(path, std::string("/browser/dist/"),
std::string("/browser/dist/wasm/"));
}
#endif // !MOBILEAPP
return path;
}
/*