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FileServer.cpp
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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 -*- */
/*
* 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 <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>
#include <Poco/DateTime.h>
#include <Poco/DateTimeFormat.h>
#include <Poco/DateTimeFormatter.h>
#include <Poco/Exception.h>
#include <Poco/FileStream.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/StreamCopier.h>
#include <Poco/URI.h>
#include <Poco/JSON/Object.h>
#include "Exceptions.hpp"
#include "Auth.hpp"
#include <Common.hpp>
#include <Crypto.hpp>
#include "FileServer.hpp"
#include "COOLWSD.hpp"
#include "ServerURL.hpp"
#include <Log.hpp>
#include <Protocol.hpp>
#include <Util.hpp>
#include <common/ConfigUtil.hpp>
#if !MOBILEAPP
#include <net/HttpHelper.hpp>
#endif
using Poco::Net::HTMLForm;
using Poco::Net::HTTPBasicCredentials;
using Poco::Net::HTTPRequest;
using Poco::Net::HTTPResponse;
using Poco::Net::NameValueCollection;
using Poco::Util::Application;
std::map<std::string, std::pair<std::string, std::string>> FileServerRequestHandler::FileHash;
/// Place from where we serve the welcome-<lang>.html; defaults to
/// welcome.html if no lang matches.
#define WELCOME_ENDPOINT "/browser/dist/welcome"
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 = Util::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
std::string string = stream.str();
return tokens.equals(4, string.c_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;
}
}
bool FileServerRequestHandler::isAdminLoggedIn(const HTTPRequest& request,
HTTPResponse &response)
{
assert(COOLWSD::AdminEnabled);
const auto& config = Application::instance().config();
NameValueCollection cookies;
request.getCookies(cookies);
try
{
const std::string 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");
}
// If no cookie found, or is invalid, let the admin re-login
HTTPBasicCredentials credentials(request);
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 (config.getBool("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");
const std::string 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() ||
COOLWSD::isSSLTermination());
response.addCookie(cookie);
return true;
}
#if ENABLE_DEBUG
// Represents basic file's attributes.
// Used for localFile
class LocalFileInfo
{
public:
// Everytime we get new request of CheckFileInfo
// we create a LocalFileInfo object of the new file and add
// it to static vector so that we can use/update the file info
// when we get GetFile and PutFile request
static std::vector<LocalFileInfo> fileInfoVec;
// Attributes of file
std::string fileName;
std::string localPath;
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
};
LocalFileInfo(){};
LocalFileInfo(std::string lpath, std::string fName)
{
fileName = fName;
localPath = lpath;
const FileUtil::Stat stat(localPath);
size = std::to_string(stat.size());
fileLastModifiedTime = stat.modifiedTimepoint();
}
//Returns index if object with attribute localPath found in
//the vector else returns -1
static int getIndex(std::string lpath)
{
auto it = std::find_if(fileInfoVec.begin(), fileInfoVec.end(), [&lpath](const LocalFileInfo& obj)
{
return obj.localPath == lpath;
});
if (it != fileInfoVec.end())
{
int index = std::distance(fileInfoVec.begin(), it);
return index;
}
else
{
return -1;
}
}
};
std::atomic<unsigned> lastLocalId;
std::vector<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 (Util::endsWith(path.toString(), suffix))
{
localPath = path.toString().substr(prefix.length(), path.toString().length() - prefix.length() - suffix.length());
}
else
{
localPath = path.toString().substr(prefix.length());
}
if (!Poco::File(localPath).exists())
{
LOG_ERR("Local file URI [" << localPath << "] invalid or doesn't exist.");
throw BadRequestException("Invalid URI: " + localPath);
}
if (request.getMethod() == "GET" && !Util::endsWith(path.toString(), suffix))
{
LocalFileInfo localFile;
if (!LocalFileInfo::fileInfoVec.empty())
{
int index = LocalFileInfo::getIndex(localPath);
if (index == -1)
{
LocalFileInfo fileInfo(localPath, path.getFileName());
LocalFileInfo::fileInfoVec.emplace_back(fileInfo);
localFile = fileInfo;
}
else
{
localFile = LocalFileInfo::fileInfoVec[index];
}
}
else
{
LocalFileInfo fileInfo(localPath, path.getFileName());
LocalFileInfo::fileInfoVec.emplace_back(fileInfo);
localFile = fileInfo;
}
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", "true");
fileInfo->set("PostMessageOrigin", postMessageOrigin);
fileInfo->set("LastModifiedTime", Util::getIso8601FracformatTime(localFile.fileLastModifiedTime));
fileInfo->set("EnableOwnerTermination", "true");
std::ostringstream jsonStream;
fileInfo->stringify(jsonStream);
std::string responseString = jsonStream.str();
const std::string mimeType = "application/json; charset=utf-8";
std::ostringstream oss;
oss << "HTTP/1.1 200 OK\r\n"
"Last-Modified: " << Util::getHttpTime(localFile.fileLastModifiedTime) << "\r\n"
"User-Agent: " WOPI_AGENT_STRING "\r\n"
"Content-Length: " << responseString.size() << "\r\n"
"Content-Type: " << mimeType << "\r\n"
"\r\n"
<< responseString;
socket->send(oss.str());
return;
}
else if(request.getMethod() == "GET" && Util::endsWith(path.toString(), suffix))
{
LocalFileInfo localFile = LocalFileInfo::fileInfoVec[LocalFileInfo::getIndex(localPath)];
auto ss = std::ostringstream{};
std::ifstream inputFile(localFile.localPath);
ss << inputFile.rdbuf();
const std::string content = ss.str();
const std::string mimeType = "text/plain; charset=utf-8";
std::ostringstream oss;
oss << "HTTP/1.1 200 OK\r\n"
"Last-Modified: " << Util::getHttpTime(localFile.fileLastModifiedTime) << "\r\n"
"User-Agent: " WOPI_AGENT_STRING "\r\n"
"Content-Length: " << localFile.size << "\r\n"
"Content-Type: " << mimeType << "\r\n"
"\r\n"
<< content;
socket->send(oss.str());
return;
}
else if (request.getMethod() == "POST" && Util::endsWith(path.toString(), suffix))
{
int i = LocalFileInfo::getIndex(localPath);
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())
{
const std::string fileModifiedTime = Util::getIso8601FracformatTime(LocalFileInfo::fileInfoVec[i].fileLastModifiedTime);
if (wopiTimestamp != fileModifiedTime)
{
http::Response httpResponse(http::StatusLine(409));
httpResponse.setBody(
"{\"COOLStatusCode\":" +
std::to_string(static_cast<int>(LocalFileInfo::COOLStatusCode::DocChanged)) + ',' +
"{\"LOOLStatusCode\":" +
std::to_string(static_cast<int>(LocalFileInfo::COOLStatusCode::DocChanged)) + '}');
socket->send(httpResponse);
return;
}
}
std::streamsize size = request.getContentLength();
std::vector<char> buffer(size);
message.read(buffer.data(), size);
LocalFileInfo::fileInfoVec[i].fileLastModifiedTime = std::chrono::system_clock::now();
std::ofstream outfile;
outfile.open(LocalFileInfo::fileInfoVec[i].localPath, std::ofstream::binary);
outfile.write(buffer.data(), size);
outfile.close();
const std::string body = "{\"LastModifiedTime\": \"" +
Util::getIso8601FracformatTime(LocalFileInfo::fileInfoVec[i].fileLastModifiedTime) +
"\" }";
http::Response httpResponse(http::StatusLine(200));
httpResponse.setBody(body);
socket->send(httpResponse);
return;
}
}
#endif
void FileServerRequestHandler::handleRequest(const HTTPRequest& request,
const RequestDetails &requestDetails,
Poco::MemoryInputStream& message,
const std::shared_ptr<StreamSocket>& socket)
{
try
{
bool noCache = false;
#if ENABLE_DEBUG
noCache = true;
#endif
Poco::Net::HTTPResponse response;
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)
{
LOG_WRN("client - server version mismatch, disabling browser cache. Expected: " COOLWSD_VERSION_HASH);
noCache = true;
}
std::vector<std::string> requestSegments;
requestUri.getPathSegments(requestSegments);
if (requestSegments.size() < 1)
throw Poco::FileNotFoundException("Invalid URI request: [" + requestUri.toString() + "].");
std::string relPath = getRequestPathname(request);
std::string endPoint = requestSegments[requestSegments.size() - 1];
const auto& config = Application::instance().config();
static std::string etagString = "\"" COOLWSD_VERSION_HASH +
config.getString("ver_suffix", "") + "\"";
#if ENABLE_DEBUG
if (Util::startsWith(relPath, std::string("/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")
{
LOG_ERR(message.rdbuf());
std::ostringstream oss;
response.write(oss);
socket->send(oss.str());
return;
}
}
// handling of the language in welcome-*.html - shorten the langtag as
// necessary, if we don't have the particular language version
if (Util::startsWith(relPath, WELCOME_ENDPOINT "/"))
{
bool found = true;
while (FileHash.find(relPath) == FileHash.end())
{
size_t dot = relPath.find_last_of('.');
if (dot == std::string::npos)
{
found = false;
break;
}
size_t dash = relPath.find_last_of("-_", dot);
if (dash == std::string::npos)
{
found = false;
break;
}
relPath = relPath.substr(0, dash) + relPath.substr(dot);
LOG_TRC("Shortening welcome file request to: " << relPath);
}
if (!found)
throw Poco::FileNotFoundException("Invalid URI welcome file request: [" + requestUri.toString() + "].");
endPoint = relPath.substr(sizeof(WELCOME_ENDPOINT));
}
// Is this a file we read at startup - if not; it's not for serving.
if (FileHash.find(relPath) == FileHash.end())
throw Poco::FileNotFoundException("Invalid URI request: [" + requestUri.toString() + "].");
if (endPoint == "cool.html" ||
endPoint == "help-localizations.json" ||
endPoint == "localizations.json" ||
endPoint == "locore-localizations.json" ||
endPoint == "uno-localizations.json" ||
endPoint == "uno-localizations-override.json")
{
preprocessFile(request, 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")
{
preprocessAdminFile(request, 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";
else
mimeType = "text/plain";
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(304, socket, std::string(), extraHeaders);
return;
}
}
response.set("Server", HTTP_SERVER_STRING);
response.set("Date", Util::getHttpTimeNow());
bool gzip = request.hasToken("Accept-Encoding", "gzip");
const std::string *content;
#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
const std::string filePath = Poco::Path(COOLWSD::FileServerRoot, relPath).absolute().toString();
HttpHelper::sendFileAndShutdown(socket, filePath, mimeType, &response, noCache);
return;
}
#endif
if (gzip)
{
response.set("Content-Encoding", "gzip");
content = getCompressedFile(relPath);
}
else
content = getUncompressedFile(relPath);
if (!noCache)
{
// 60 * 60 * 24 * 128 (days) = 11059200
response.set("Cache-Control", "max-age=11059200");
response.set("ETag", etagString);
}
response.setContentType(mimeType);
response.add("X-Content-Type-Options", "nosniff");
std::ostringstream oss;
response.write(oss);
const std::string header = oss.str();
LOG_TRC('#' << socket->getFD() << ": Sending " <<
(!gzip ? "un":"") << "compressed : file [" << relPath << "]: " << header);
socket->send(header);
socket->send(*content);
// shutdown by caller
}
}
catch (const Poco::Net::NotAuthenticatedException& exc)
{
LOG_ERR("FileServerRequestHandler::NotAuthenticated: " << exc.displayText());
sendError(401, request, socket, "", "", "WWW-authenticate: Basic realm=\"online\"\r\n");
}
catch (const Poco::FileAccessDeniedException& exc)
{
LOG_ERR("FileServerRequestHandler: " << exc.displayText());
sendError(403, request, socket, "403 - Access denied!",
"You are unable to access");
}
catch (const Poco::FileNotFoundException& exc)
{
LOG_ERR("FileServerRequestHandler: " << exc.displayText());
sendError(404, 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(500, request, socket, "500 - Internal Server Error!",
"Cannot process the request");
}
}
void FileServerRequestHandler::sendError(int 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())
{
Poco::URI requestUri(request.getURI());
std::string pathSanitized;
Poco::URI::encode(requestUri.getPath(), "", pathSanitized);
headers += "Content-Type: text/html charset=UTF-8\r\n";
body = "<h1>Error: " + shortMessage + "</h1>" +
"<p>" + longMessage + ' ' + pathSanitized + "</p>" +
"<p>Please contact your system administrator.</p>";
}
HttpHelper::sendError(errorCode, socket, body, headers);
}
void FileServerRequestHandler::readDirToHash(const std::string &basePath, const std::string &path, const std::string &prefix)
{
LOG_DBG("Caching files in [" << basePath + path << ']');
DIR* workingdir = opendir((basePath + path).c_str());
if (!workingdir)
{
LOG_SYS("Failed to open directory [" << basePath + path << ']');
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;
stat ((basePath + relPath).c_str(), &fileStat);
if (S_ISDIR(fileStat.st_mode))
readDirToHash(basePath, relPath);
else if (S_ISREG(fileStat.st_mode))
{
fileCount++;
filesRead.append(currentFile->d_name);
filesRead += ' ';
std::ifstream file(basePath + relPath, std::ios::binary);
z_stream strm;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 31, 8, Z_DEFAULT_STRATEGY);
std::unique_ptr<char[]> buf(new char[fileStat.st_size]);
std::string compressedFile;
compressedFile.reserve(fileStat.st_size);
std::string uncompressedFile;
uncompressedFile.reserve(fileStat.st_size);
do
{
file.read(&buf[0], fileStat.st_size);
const long unsigned int size = file.gcount();
if (size == 0)
break;
const long unsigned int compSize = compressBound(size);
char *cbuf = (char *)calloc(compSize, sizeof(char));
strm.next_in = (unsigned char *)&buf[0];
strm.avail_in = size;
strm.avail_out = compSize;
strm.next_out = (unsigned char *)&cbuf[0];
deflate(&strm, Z_FINISH);
const long unsigned int haveComp = compSize - strm.avail_out;
std::string partialcompFile(cbuf, haveComp);
std::string partialuncompFile(buf.get(), size);
compressedFile += partialcompFile;
uncompressedFile += partialuncompFile;
free(cbuf);
} while(true);
FileHash.emplace(prefix + relPath, std::make_pair(uncompressedFile, compressedFile));
deflateEnd(&strm);
}
}
closedir(workingdir);
if (fileCount > 0)
LOG_TRC("Pre-read " << fileCount << " file(s) from directory: " << basePath << path << ": " << filesRead);
}
void FileServerRequestHandler::initialize()
{
// cool files
try {
readDirToHash(COOLWSD::FileServerRoot, "/browser/dist");
} catch (...) {
LOG_ERR("Failed to read from directory " << COOLWSD::FileServerRoot);
}
// welcome / release notes files
if (!COOLWSD::WelcomeFilesRoot.empty())
{
try {
readDirToHash(COOLWSD::WelcomeFilesRoot, "", WELCOME_ENDPOINT);
} catch (...) {
LOG_ERR("Failed to read from directory " << COOLWSD::WelcomeFilesRoot);
}
}
}
const std::string *FileServerRequestHandler::getCompressedFile(const std::string &path)
{
return &FileHash[path].second;
}
const std::string *FileServerRequestHandler::getUncompressedFile(const std::string &path)
{
return &FileHash[path].first;
}
std::string FileServerRequestHandler::getRequestPathname(const HTTPRequest& request)
{
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/"));
}
return path;
}
constexpr char BRANDING[] = "branding";
#if ENABLE_SUPPORT_KEY
constexpr char BRANDING_UNSUPPORTED[] = "branding-unsupported";
#endif
namespace {
}
void FileServerRequestHandler::preprocessFile(const HTTPRequest& request,
const RequestDetails &requestDetails,
Poco::MemoryInputStream& message,
const std::shared_ptr<StreamSocket>& socket)
{
ServerURL cnxDetails(requestDetails);
const Poco::URI::QueryParameters params = Poco::URI(request.getURI()).getQueryParameters();
// Is this a file we read at startup - if not; it's not for serving.
const std::string relPath = getRequestPathname(request);
LOG_DBG("Preprocessing file: " << relPath);
std::string preprocess = *getUncompressedFile(relPath);
// We need to pass certain parameters from the cool html GET URI
// to the embedded document URI. Here we extract those params
// from the GET URI and set them in the generated html (see cool.html.m4).
HTMLForm form(request, message);
const std::string accessToken = form.get("access_token", "");
const std::string accessTokenTtl = form.get("access_token_ttl", "");
LOG_TRC("access_token=" << accessToken << ", access_token_ttl=" << accessTokenTtl);
const std::string accessHeader = form.get("access_header", "");
LOG_TRC("access_header=" << accessHeader);
const std::string uiDefaults = form.get("ui_defaults", "");
LOG_TRC("ui_defaults=" << uiDefaults);
const std::string cssVars = form.get("css_variables", "");
LOG_TRC("css_variables=" << cssVars);
const std::string postMessageOrigin = form.get("postmessage_origin", "");
LOG_TRC("postmessage_origin" << postMessageOrigin);
const std::string theme = form.get("theme", "");
LOG_TRC("theme=" << theme);
// Escape bad characters in access token.
// This is placed directly in javascript in cool.html, we need to make sure
// that no one can do anything nasty with their clever inputs.
std::string escapedAccessToken, escapedAccessHeader, escapedPostmessageOrigin;
Poco::URI::encode(accessToken, "'", escapedAccessToken);
Poco::URI::encode(accessHeader, "'", escapedAccessHeader);
Poco::URI::encode(postMessageOrigin, "'", escapedPostmessageOrigin);
unsigned long tokenTtl = 0;
if (!accessToken.empty())
{
if (!accessTokenTtl.empty())
{
try
{
tokenTtl = std::stoul(accessTokenTtl);
}
catch (const std::exception& exc)
{
LOG_ERR("access_token_ttl must be represented as the number of milliseconds since January 1, 1970 UTC, when the token will expire");
}
}
else
{
LOG_INF("WOPI host did not pass optional access_token_ttl");
}
}
std::string socketProxy = "false";
if (requestDetails.isProxy())
socketProxy = "true";
Poco::replaceInPlace(preprocess, std::string("%SOCKET_PROXY%"), socketProxy);
std::string responseRoot = cnxDetails.getResponseRoot();
std::string userInterfaceMode;
Poco::replaceInPlace(preprocess, std::string("%ACCESS_TOKEN%"), escapedAccessToken);
Poco::replaceInPlace(preprocess, std::string("%ACCESS_TOKEN_TTL%"), std::to_string(tokenTtl));
Poco::replaceInPlace(preprocess, std::string("%ACCESS_HEADER%"), escapedAccessHeader);
Poco::replaceInPlace(preprocess, std::string("%HOST%"), cnxDetails.getWebSocketUrl());
Poco::replaceInPlace(preprocess, std::string("%VERSION%"), std::string(COOLWSD_VERSION_HASH));
Poco::replaceInPlace(preprocess, std::string("%SERVICE_ROOT%"), responseRoot);
Poco::replaceInPlace(preprocess, std::string("%UI_DEFAULTS%"), uiDefaultsToJSON(uiDefaults, userInterfaceMode));
Poco::replaceInPlace(preprocess, std::string("%POSTMESSAGE_ORIGIN%"), escapedPostmessageOrigin);
const auto& config = Application::instance().config();
std::string protocolDebug = stringifyBoolFromConfig(config, "logging.protocol", false);
Poco::replaceInPlace(preprocess, std::string("%PROTOCOL_DEBUG%"), protocolDebug);
static const std::string hexifyEmbeddedUrls =
COOLWSD::getConfigValue<bool>("hexify_embedded_urls", false) ? "true" : "false";
Poco::replaceInPlace(preprocess, std::string("%HEXIFY_URL%"), hexifyEmbeddedUrls);
std::string themePreFix = (theme == "nextcloud") ? theme + "/" : "";
const std::string linkCSS("<link rel=\"stylesheet\" href=\"%s/browser/" COOLWSD_VERSION_HASH "/" + themePreFix + "%s.css\">");
const std::string scriptJS("<script src=\"%s/browser/" COOLWSD_VERSION_HASH "/" + themePreFix + "%s.js\"></script>");
std::string brandCSS(Poco::format(linkCSS, responseRoot, std::string(BRANDING)));
std::string brandJS(Poco::format(scriptJS, responseRoot, std::string(BRANDING)));
#if ENABLE_SUPPORT_KEY
const std::string keyString = config.getString("support_key", "");
SupportKey key(keyString);
if (!key.verify() || key.validDaysRemaining() <= 0)
{
brandCSS = Poco::format(linkCSS, responseRoot, std::string(BRANDING_UNSUPPORTED));
brandJS = Poco::format(scriptJS, responseRoot, std::string(BRANDING_UNSUPPORTED));
}
#endif
Poco::replaceInPlace(preprocess, std::string("<!--%BRANDING_CSS%-->"), brandCSS);
Poco::replaceInPlace(preprocess, std::string("<!--%BRANDING_JS%-->"), brandJS);
Poco::replaceInPlace(preprocess, std::string("<!--%CSS_VARIABLES%-->"), cssVarsToStyle(cssVars));
// Customization related to document signing.
std::string documentSigningDiv;
std::string escapedDocumentSigningURL;
const std::string documentSigningURL = config.getString("per_document.document_signing_url", "");
if (!documentSigningURL.empty())
{
documentSigningDiv = "<div id=\"document-signing-bar\"></div>";
Poco::URI::encode(documentSigningURL, "'", escapedDocumentSigningURL);
}
Poco::replaceInPlace(preprocess, std::string("<!--%DOCUMENT_SIGNING_DIV%-->"), documentSigningDiv);
Poco::replaceInPlace(preprocess, std::string("%DOCUMENT_SIGNING_URL%"), escapedDocumentSigningURL);
const auto coolLogging = stringifyBoolFromConfig(config, "browser_logging", false);
Poco::replaceInPlace(preprocess, std::string("%BROWSER_LOGGING%"), coolLogging);
const unsigned int outOfFocusTimeoutSecs = config.getUInt("per_view.out_of_focus_timeout_secs", 60);
Poco::replaceInPlace(preprocess, std::string("%OUT_OF_FOCUS_TIMEOUT_SECS%"), std::to_string(outOfFocusTimeoutSecs));
const unsigned int idleTimeoutSecs = config.getUInt("per_view.idle_timeout_secs", 900);
Poco::replaceInPlace(preprocess, std::string("%IDLE_TIMEOUT_SECS%"), std::to_string(idleTimeoutSecs));