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#include <config.h>
#include <apt-pkg/cmndline.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/strutl.h>
#include <dirent.h>
#include <errno.h>
#include <netinet/in.h>
#include <pthread.h>
#include <regex.h>
#include <signal.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include <algorithm>
#include <iostream>
#include <sstream>
#include <list>
#include <string>
#include <vector>
static std::string httpcodeToStr(int const httpcode) /*{{{*/
{
switch (httpcode)
{
// Informational 1xx
case 100: return _config->Find("aptwebserver::httpcode::100", "100 Continue");
case 101: return _config->Find("aptwebserver::httpcode::101", "101 Switching Protocols");
// Successful 2xx
case 200: return _config->Find("aptwebserver::httpcode::200", "200 OK");
case 201: return _config->Find("aptwebserver::httpcode::201", "201 Created");
case 202: return _config->Find("aptwebserver::httpcode::202", "202 Accepted");
case 203: return _config->Find("aptwebserver::httpcode::203", "203 Non-Authoritative Information");
case 204: return _config->Find("aptwebserver::httpcode::204", "204 No Content");
case 205: return _config->Find("aptwebserver::httpcode::205", "205 Reset Content");
case 206: return _config->Find("aptwebserver::httpcode::206", "206 Partial Content");
// Redirections 3xx
case 300: return _config->Find("aptwebserver::httpcode::300", "300 Multiple Choices");
case 301: return _config->Find("aptwebserver::httpcode::301", "301 Moved Permanently");
case 302: return _config->Find("aptwebserver::httpcode::302", "302 Found");
case 303: return _config->Find("aptwebserver::httpcode::303", "303 See Other");
case 304: return _config->Find("aptwebserver::httpcode::304", "304 Not Modified");
case 305: return _config->Find("aptwebserver::httpcode::305", "305 Use Proxy");
case 307: return _config->Find("aptwebserver::httpcode::307", "307 Temporary Redirect");
// Client errors 4xx
case 400: return _config->Find("aptwebserver::httpcode::400", "400 Bad Request");
case 401: return _config->Find("aptwebserver::httpcode::401", "401 Unauthorized");
case 402: return _config->Find("aptwebserver::httpcode::402", "402 Payment Required");
case 403: return _config->Find("aptwebserver::httpcode::403", "403 Forbidden");
case 404: return _config->Find("aptwebserver::httpcode::404", "404 Not Found");
case 405: return _config->Find("aptwebserver::httpcode::405", "405 Method Not Allowed");
case 406: return _config->Find("aptwebserver::httpcode::406", "406 Not Acceptable");
case 407: return _config->Find("aptwebserver::httpcode::407", "407 Proxy Authentication Required");
case 408: return _config->Find("aptwebserver::httpcode::408", "408 Request Time-out");
case 409: return _config->Find("aptwebserver::httpcode::409", "409 Conflict");
case 410: return _config->Find("aptwebserver::httpcode::410", "410 Gone");
case 411: return _config->Find("aptwebserver::httpcode::411", "411 Length Required");
case 412: return _config->Find("aptwebserver::httpcode::412", "412 Precondition Failed");
case 413: return _config->Find("aptwebserver::httpcode::413", "413 Request Entity Too Large");
case 414: return _config->Find("aptwebserver::httpcode::414", "414 Request-URI Too Large");
case 415: return _config->Find("aptwebserver::httpcode::415", "415 Unsupported Media Type");
case 416: return _config->Find("aptwebserver::httpcode::416", "416 Requested range not satisfiable");
case 417: return _config->Find("aptwebserver::httpcode::417", "417 Expectation Failed");
case 418: return _config->Find("aptwebserver::httpcode::418", "418 I'm a teapot");
// Server error 5xx
case 500: return _config->Find("aptwebserver::httpcode::500", "500 Internal Server Error");
case 501: return _config->Find("aptwebserver::httpcode::501", "501 Not Implemented");
case 502: return _config->Find("aptwebserver::httpcode::502", "502 Bad Gateway");
case 503: return _config->Find("aptwebserver::httpcode::503", "503 Service Unavailable");
case 504: return _config->Find("aptwebserver::httpcode::504", "504 Gateway Time-out");
case 505: return _config->Find("aptwebserver::httpcode::505", "505 HTTP Version not supported");
}
return "";
}
/*}}}*/
static bool chunkedTransferEncoding(std::list<std::string> const &headers) {
if (std::find(headers.begin(), headers.end(), "Transfer-Encoding: chunked") != headers.end())
return true;
if (_config->FindB("aptwebserver::chunked-transfer-encoding", false) == true)
return true;
return false;
}
static void addFileHeaders(std::list<std::string> &headers, FileFd &data)/*{{{*/
{
if (chunkedTransferEncoding(headers) == false)
{
std::ostringstream contentlength;
contentlength << "Content-Length: " << data.FileSize();
headers.push_back(contentlength.str());
}
std::string lastmodified("Last-Modified: ");
lastmodified.append(TimeRFC1123(data.ModificationTime()));
headers.push_back(lastmodified);
}
/*}}}*/
static void addDataHeaders(std::list<std::string> &headers, std::string &data)/*{{{*/
{
if (chunkedTransferEncoding(headers) == false)
{
std::ostringstream contentlength;
contentlength << "Content-Length: " << data.size();
headers.push_back(contentlength.str());
}
}
/*}}}*/
static bool sendHead(int const client, int const httpcode, std::list<std::string> &headers)/*{{{*/
{
std::string response("HTTP/1.1 ");
response.append(httpcodeToStr(httpcode));
headers.push_front(response);
_config->Set("APTWebserver::Last-Status-Code", httpcode);
std::stringstream buffer;
_config->Dump(buffer, "aptwebserver::response-header", "%t: %v%n", false);
std::vector<std::string> addheaders = VectorizeString(buffer.str(), '\n');
for (std::vector<std::string>::const_iterator h = addheaders.begin(); h != addheaders.end(); ++h)
headers.push_back(*h);
std::string date("Date: ");
date.append(TimeRFC1123(time(NULL)));
headers.push_back(date);
if (chunkedTransferEncoding(headers) == true)
headers.push_back("Transfer-Encoding: chunked");
std::clog << ">>> RESPONSE to " << client << " >>>" << std::endl;
bool Success = true;
for (std::list<std::string>::const_iterator h = headers.begin();
Success == true && h != headers.end(); ++h)
{
Success &= FileFd::Write(client, h->c_str(), h->size());
if (Success == true)
Success &= FileFd::Write(client, "\r\n", 2);
std::clog << *h << std::endl;
}
if (Success == true)
Success &= FileFd::Write(client, "\r\n", 2);
std::clog << "<<<<<<<<<<<<<<<<" << std::endl;
return Success;
}
/*}}}*/
static bool sendFile(int const client, std::list<std::string> const &headers, FileFd &data)/*{{{*/
{
bool Success = true;
bool const chunked = chunkedTransferEncoding(headers);
char buffer[500];
unsigned long long actual = 0;
while ((Success &= data.Read(buffer, sizeof(buffer), &actual)) == true)
{
if (actual == 0)
break;
if (chunked == true)
{
std::string size;
strprintf(size, "%llX\r\n", actual);
Success &= FileFd::Write(client, size.c_str(), size.size());
Success &= FileFd::Write(client, buffer, actual);
Success &= FileFd::Write(client, "\r\n", strlen("\r\n"));
}
else
Success &= FileFd::Write(client, buffer, actual);
}
if (chunked == true)
{
char const * const finish = "0\r\n\r\n";
Success &= FileFd::Write(client, finish, strlen(finish));
}
if (Success == false)
std::cerr << "SENDFILE:" << (chunked ? " CHUNKED" : "") << " READ/WRITE ERROR to " << client << std::endl;
return Success;
}
/*}}}*/
static bool sendData(int const client, std::list<std::string> const &headers, std::string const &data)/*{{{*/
{
if (chunkedTransferEncoding(headers) == true)
{
unsigned long long const ullsize = data.length();
std::string size;
strprintf(size, "%llX\r\n", ullsize);
char const * const finish = "\r\n0\r\n\r\n";
if (FileFd::Write(client, size.c_str(), size.length()) == false ||
FileFd::Write(client, data.c_str(), ullsize) == false ||
FileFd::Write(client, finish, strlen(finish)) == false)
{
std::cerr << "SENDDATA: CHUNK WRITE ERROR to " << client << std::endl;
return false;
}
}
else if (FileFd::Write(client, data.c_str(), data.size()) == false)
{
std::cerr << "SENDDATA: WRITE ERROR to " << client << std::endl;
return false;
}
return true;
}
/*}}}*/
static void sendError(int const client, int const httpcode, std::string const &request,/*{{{*/
bool const content, std::string const &error, std::list<std::string> &headers)
{
std::string response("<html><head><title>");
response.append(httpcodeToStr(httpcode)).append("</title></head>");
response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1>");
if (httpcode != 200)
response.append("<p><em>Error</em>: ");
else
response.append("<p><em>Success</em>: ");
if (error.empty() == false)
response.append(error);
else
response.append(httpcodeToStr(httpcode));
if (httpcode != 200)
response.append("</p>This error is a result of the request: <pre>");
else
response.append("The successfully executed operation was requested by: <pre>");
response.append(request).append("</pre></body></html>");
if (httpcode != 200)
{
if (_config->FindB("aptwebserver::closeOnError", false) == true)
headers.push_back("Connection: close");
}
addDataHeaders(headers, response);
sendHead(client, httpcode, headers);
if (content == true)
sendData(client, headers, response);
}
static void sendSuccess(int const client, std::string const &request,
bool const content, std::string const &error, std::list<std::string> &headers)
{
sendError(client, 200, request, content, error, headers);
}
/*}}}*/
static void sendRedirect(int const client, int const httpcode, std::string const &uri,/*{{{*/
std::string const &request, bool content)
{
std::list<std::string> headers;
std::string response("<html><head><title>");
response.append(httpcodeToStr(httpcode)).append("</title></head>");
response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1");
response.append("<p>You should be redirected to <em>").append(uri).append("</em></p>");
response.append("This page is a result of the request: <pre>");
response.append(request).append("</pre></body></html>");
addDataHeaders(headers, response);
std::string location("Location: ");
if (strncmp(uri.c_str(), "http://", 7) != 0 && strncmp(uri.c_str(), "https://", 8) != 0)
{
std::string const host = LookupTag(request, "Host");
if (host.find(":4433") != std::string::npos)
location.append("https://");
else
location.append("http://");
location.append(host).append("/");
if (strncmp("/home/", uri.c_str(), strlen("/home/")) == 0 && uri.find("/public_html/") != std::string::npos)
{
std::string homeuri = SubstVar(uri, "/home/", "~");
homeuri = SubstVar(homeuri, "/public_html/", "/");
location.append(homeuri);
}
else
location.append(uri);
}
else
location.append(uri);
headers.push_back(location);
sendHead(client, httpcode, headers);
if (content == true)
sendData(client, headers, response);
}
/*}}}*/
static int filter_hidden_files(const struct dirent *a) /*{{{*/
{
if (a->d_name[0] == '.')
return 0;
#ifdef _DIRENT_HAVE_D_TYPE
// if we have the d_type check that only files and dirs will be included
if (a->d_type != DT_UNKNOWN &&
a->d_type != DT_REG &&
a->d_type != DT_LNK && // this includes links to regular files
a->d_type != DT_DIR)
return 0;
#endif
return 1;
}
static int grouped_alpha_case_sort(const struct dirent **a, const struct dirent **b) {
#ifdef _DIRENT_HAVE_D_TYPE
if ((*a)->d_type == DT_DIR && (*b)->d_type == DT_DIR);
else if ((*a)->d_type == DT_DIR && (*b)->d_type == DT_REG)
return -1;
else if ((*b)->d_type == DT_DIR && (*a)->d_type == DT_REG)
return 1;
else
#endif
{
struct stat f_prop; //File's property
stat((*a)->d_name, &f_prop);
int const amode = f_prop.st_mode;
stat((*b)->d_name, &f_prop);
int const bmode = f_prop.st_mode;
if (S_ISDIR(amode) && S_ISDIR(bmode));
else if (S_ISDIR(amode))
return -1;
else if (S_ISDIR(bmode))
return 1;
}
return strcasecmp((*a)->d_name, (*b)->d_name);
}
/*}}}*/
static void sendDirectoryListing(int const client, std::string const &dir,/*{{{*/
std::string const &request, bool content, std::list<std::string> &headers)
{
std::ostringstream listing;
struct dirent **namelist;
int const counter = scandir(dir.c_str(), &namelist, filter_hidden_files, grouped_alpha_case_sort);
if (counter == -1)
{
sendError(client, 500, request, content, "scandir failed", headers);
return;
}
listing << "<html><head><title>Index of " << dir << "</title>"
<< "<style type=\"text/css\"><!-- td {padding: 0.02em 0.5em 0.02em 0.5em;}"
<< "tr:nth-child(even){background-color:#dfdfdf;}"
<< "h1, td:nth-child(3){text-align:center;}"
<< "table {margin-left:auto;margin-right:auto;} --></style>"
<< "</head>" << std::endl
<< "<body><h1>Index of " << dir << "</h1>" << std::endl
<< "<table><tr><th>#</th><th>Name</th><th>Size</th><th>Last-Modified</th></tr>" << std::endl;
if (dir != "./")
listing << "<tr><td>d</td><td><a href=\"..\">Parent Directory</a></td><td>-</td><td>-</td></tr>";
for (int i = 0; i < counter; ++i) {
struct stat fs;
std::string filename(dir);
filename.append("/").append(namelist[i]->d_name);
stat(filename.c_str(), &fs);
if (S_ISDIR(fs.st_mode))
{
listing << "<tr><td>d</td>"
<< "<td><a href=\"" << namelist[i]->d_name << "/\">" << namelist[i]->d_name << "</a></td>"
<< "<td>-</td>";
}
else
{
listing << "<tr><td>f</td>"
<< "<td><a href=\"" << namelist[i]->d_name << "\">" << namelist[i]->d_name << "</a></td>"
<< "<td>" << SizeToStr(fs.st_size) << "B</td>";
}
listing << "<td>" << TimeRFC1123(fs.st_mtime) << "</td></tr>" << std::endl;
}
listing << "</table></body></html>" << std::endl;
std::string response(listing.str());
addDataHeaders(headers, response);
sendHead(client, 200, headers);
if (content == true)
sendData(client, headers, response);
}
/*}}}*/
static bool parseFirstLine(int const client, std::string const &request,/*{{{*/
std::string &filename, std::string &params, bool &sendContent,
bool &closeConnection, std::list<std::string> &headers)
{
if (strncmp(request.c_str(), "HEAD ", 5) == 0)
sendContent = false;
if (strncmp(request.c_str(), "GET ", 4) != 0)
{
sendError(client, 501, request, true, "", headers);
return false;
}
size_t const lineend = request.find('\n');
size_t filestart = request.find(' ');
for (; request[filestart] == ' '; ++filestart);
size_t fileend = request.rfind(' ', lineend);
if (lineend == std::string::npos || filestart == std::string::npos ||
fileend == std::string::npos || filestart == fileend)
{
sendError(client, 500, request, sendContent, "Filename can't be extracted", headers);
return false;
}
size_t httpstart = fileend;
for (; request[httpstart] == ' '; ++httpstart);
if (strncmp(request.c_str() + httpstart, "HTTP/1.1\r", 9) == 0)
closeConnection = strcasecmp(LookupTag(request, "Connection", "Keep-Alive").c_str(), "Keep-Alive") != 0;
else if (strncmp(request.c_str() + httpstart, "HTTP/1.0\r", 9) == 0)
closeConnection = strcasecmp(LookupTag(request, "Connection", "Keep-Alive").c_str(), "close") == 0;
else
{
sendError(client, 500, request, sendContent, "Not a HTTP/1.{0,1} request", headers);
return false;
}
filename = request.substr(filestart, fileend - filestart);
if (filename.find(' ') != std::string::npos)
{
sendError(client, 500, request, sendContent, "Filename contains an unencoded space", headers);
return false;
}
std::string host = LookupTag(request, "Host", "");
if (host.empty() == true)
{
// RFC 2616 §14.23 requires Host
sendError(client, 400, request, sendContent, "Host header is required", headers);
return false;
}
host = "http://" + host;
// Proxies require absolute uris, so this is a simple proxy-fake option
std::string const absolute = _config->Find("aptwebserver::request::absolute", "uri,path");
if (strncmp(host.c_str(), filename.c_str(), host.length()) == 0 && APT::String::Startswith(filename, "/_config/") == false)
{
if (absolute.find("uri") == std::string::npos)
{
sendError(client, 400, request, sendContent, "Request is absoluteURI, but configured to not accept that", headers);
return false;
}
// strip the host from the request to make it an absolute path
filename.erase(0, host.length());
std::string const authConf = _config->Find("aptwebserver::proxy-authorization", "");
std::string auth = LookupTag(request, "Proxy-Authorization", "");
if (authConf.empty() != auth.empty())
{
if (auth.empty())
sendError(client, 407, request, sendContent, "Proxy requires authentication", headers);
else
sendError(client, 407, request, sendContent, "Client wants to authenticate to proxy, but proxy doesn't need it", headers);
return false;
}
if (authConf.empty() == false)
{
char const * const basic = "Basic ";
if (strncmp(auth.c_str(), basic, strlen(basic)) == 0)
{
auth.erase(0, strlen(basic));
if (auth != authConf)
{
sendError(client, 407, request, sendContent, "Proxy-Authentication doesn't match", headers);
return false;
}
}
else
{
std::list<std::string> headers;
headers.push_back("Proxy-Authenticate: Basic");
sendError(client, 407, request, sendContent, "Unsupported Proxy-Authentication Scheme", headers);
return false;
}
}
}
else if (absolute.find("path") == std::string::npos && APT::String::Startswith(filename, "/_config/") == false)
{
sendError(client, 400, request, sendContent, "Request is absolutePath, but configured to not accept that", headers);
return false;
}
if (APT::String::Startswith(filename, "/_config/") == false)
{
std::string const authConf = _config->Find("aptwebserver::authorization", "");
std::string auth = LookupTag(request, "Authorization", "");
if (authConf.empty() != auth.empty())
{
if (auth.empty())
sendError(client, 401, request, sendContent, "Server requires authentication", headers);
else
sendError(client, 401, request, sendContent, "Client wants to authenticate to server, but server doesn't need it", headers);
return false;
}
if (authConf.empty() == false)
{
char const * const basic = "Basic ";
if (strncmp(auth.c_str(), basic, strlen(basic)) == 0)
{
auth.erase(0, strlen(basic));
if (auth != authConf)
{
sendError(client, 401, request, sendContent, "Authentication doesn't match", headers);
return false;
}
}
else
{
headers.push_back("WWW-Authenticate: Basic");
sendError(client, 401, request, sendContent, "Unsupported Authentication Scheme", headers);
return false;
}
}
}
size_t paramspos = filename.find('?');
if (paramspos != std::string::npos)
{
params = filename.substr(paramspos + 1);
filename.erase(paramspos);
}
filename = DeQuoteString(filename);
// this is not a secure server, but at least prevent the obvious …
if (filename.empty() == true || filename[0] != '/' ||
strncmp(filename.c_str(), "//", 2) == 0 ||
filename.find_first_of("\r\n\t\f\v") != std::string::npos ||
filename.find("/../") != std::string::npos)
{
std::list<std::string> headers;
sendError(client, 400, request, sendContent, "Filename contains illegal character (sequence)", headers);
return false;
}
// nuke the first character which is a / as we assured above
filename.erase(0, 1);
if (filename.empty() == true)
filename = "./";
// support ~user/ uris to refer to /home/user/public_html/ as a kind-of special directory
else if (filename[0] == '~')
{
// /home/user is actually not entirely correct, but good enough for now
size_t dashpos = filename.find('/');
if (dashpos != std::string::npos)
{
std::string home = filename.substr(1, filename.find('/') - 1);
std::string pubhtml = filename.substr(filename.find('/') + 1);
filename = "/home/" + home + "/public_html/" + pubhtml;
}
else
filename = "/home/" + filename.substr(1) + "/public_html/";
}
// if no filename is given, but a valid directory see if we can use an index or
// have to resort to a autogenerated directory listing later on
if (DirectoryExists(filename) == true)
{
std::string const directoryIndex = _config->Find("aptwebserver::directoryindex");
if (directoryIndex.empty() == false && directoryIndex == flNotDir(directoryIndex) &&
RealFileExists(filename + directoryIndex) == true)
filename += directoryIndex;
}
return true;
}
/*}}}*/
static bool handleOnTheFlyReconfiguration(int const client, std::string const &request,/*{{{*/
std::vector<std::string> parts, std::list<std::string> &headers)
{
size_t const pcount = parts.size();
for (size_t i = 0; i < pcount; ++i)
parts[i] = DeQuoteString(parts[i]);
if (pcount == 4 && parts[1] == "set")
{
_config->Set(parts[2], parts[3]);
sendSuccess(client, request, true, "Option '" + parts[2] + "' was set to '" + parts[3] + "'!", headers);
return true;
}
else if (pcount == 4 && parts[1] == "find")
{
std::string response = _config->Find(parts[2], parts[3]);
addDataHeaders(headers, response);
sendHead(client, 200, headers);
sendData(client, headers, response);
return true;
}
else if (pcount == 3 && parts[1] == "find")
{
if (_config->Exists(parts[2]) == true)
{
std::string response = _config->Find(parts[2]);
addDataHeaders(headers, response);
sendHead(client, 200, headers);
sendData(client, headers, response);
return true;
}
sendError(client, 404, request, true, "Requested Configuration option doesn't exist", headers);
return false;
}
else if (pcount == 3 && parts[1] == "clear")
{
_config->Clear(parts[2]);
sendSuccess(client, request, true, "Option '" + parts[2] + "' was cleared.", headers);
return true;
}
sendError(client, 400, request, true, "Unknown on-the-fly configuration request", headers);
return false;
}
/*}}}*/
static void * handleClient(void * voidclient) /*{{{*/
{
int client = *((int*)(voidclient));
std::clog << "ACCEPT client " << client << std::endl;
std::vector<std::string> messages;
bool closeConnection = false;
std::list<std::string> headers;
while (closeConnection == false && ReadMessages(client, messages))
{
// if we announced a closing, do the close
if (std::find(headers.begin(), headers.end(), std::string("Connection: close")) != headers.end())
break;
headers.clear();
for (std::vector<std::string>::const_iterator m = messages.begin();
m != messages.end() && closeConnection == false; ++m) {
std::clog << ">>> REQUEST from " << client << " >>>" << std::endl << *m
<< std::endl << "<<<<<<<<<<<<<<<<" << std::endl;
std::string filename;
std::string params;
bool sendContent = true;
if (parseFirstLine(client, *m, filename, params, sendContent, closeConnection, headers) == false)
continue;
// special webserver command request
if (filename.length() > 1 && filename[0] == '_')
{
std::vector<std::string> parts = VectorizeString(filename, '/');
if (parts[0] == "_config")
{
handleOnTheFlyReconfiguration(client, *m, parts, headers);
continue;
}
}
// string replacements in the requested filename
::Configuration::Item const *Replaces = _config->Tree("aptwebserver::redirect::replace");
if (Replaces != NULL)
{
std::string redirect = "/" + filename;
for (::Configuration::Item *I = Replaces->Child; I != NULL; I = I->Next)
redirect = SubstVar(redirect, I->Tag, I->Value);
if (redirect.empty() == false && redirect[0] == '/')
redirect.erase(0,1);
if (redirect != filename)
{
sendRedirect(client, 301, redirect, *m, sendContent);
continue;
}
}
::Configuration::Item const *Overwrite = _config->Tree("aptwebserver::overwrite");
if (Overwrite != NULL)
{
for (::Configuration::Item *I = Overwrite->Child; I != NULL; I = I->Next)
{
regex_t *pattern = new regex_t;
int const res = regcomp(pattern, I->Tag.c_str(), REG_EXTENDED | REG_ICASE | REG_NOSUB);
if (res != 0)
{
char error[300];
regerror(res, pattern, error, sizeof(error));
sendError(client, 500, *m, sendContent, error, headers);
continue;
}
if (regexec(pattern, filename.c_str(), 0, 0, 0) == 0)
{
filename = _config->Find("aptwebserver::overwrite::" + I->Tag + "::filename", filename);
if (filename[0] == '/')
filename.erase(0,1);
regfree(pattern);
break;
}
regfree(pattern);
}
}
// deal with the request
if (_config->FindB("aptwebserver::support::http", true) == false &&
LookupTag(*m, "Host").find(":4433") == std::string::npos)
{
sendError(client, 400, *m, sendContent, "HTTP disabled, all requests must be HTTPS", headers);
continue;
}
else if (RealFileExists(filename) == true)
{
FileFd data(filename, FileFd::ReadOnly);
std::string condition = LookupTag(*m, "If-Modified-Since", "");
if (_config->FindB("aptwebserver::support::modified-since", true) == true && condition.empty() == false)
{
time_t cache;
if (RFC1123StrToTime(condition.c_str(), cache) == true &&
cache >= data.ModificationTime())
{
sendHead(client, 304, headers);
continue;
}
}
if (_config->FindB("aptwebserver::support::range", true) == true)
condition = LookupTag(*m, "Range", "");
else
condition.clear();
if (condition.empty() == false && strncmp(condition.c_str(), "bytes=", 6) == 0)
{
time_t cache;
std::string ifrange;
if (_config->FindB("aptwebserver::support::if-range", true) == true)
ifrange = LookupTag(*m, "If-Range", "");
bool validrange = (ifrange.empty() == true ||
(RFC1123StrToTime(ifrange.c_str(), cache) == true &&
cache <= data.ModificationTime()));
// FIXME: support multiple byte-ranges (APT clients do not do this)
if (condition.find(',') == std::string::npos)
{
size_t start = 6;
unsigned long long filestart = strtoull(condition.c_str() + start, NULL, 10);
// FIXME: no support for last-byte-pos being not the end of the file (APT clients do not do this)
size_t dash = condition.find('-') + 1;
unsigned long long fileend = strtoull(condition.c_str() + dash, NULL, 10);
unsigned long long filesize = data.FileSize();
if ((fileend == 0 || (fileend == filesize && fileend >= filestart)) &&
validrange == true)
{
if (filesize > filestart)
{
data.Skip(filestart);
std::ostringstream contentlength;
contentlength << "Content-Length: " << (filesize - filestart);
headers.push_back(contentlength.str());
std::ostringstream contentrange;
contentrange << "Content-Range: bytes " << filestart << "-"
<< filesize - 1 << "/" << filesize;
headers.push_back(contentrange.str());
sendHead(client, 206, headers);
if (sendContent == true)
sendFile(client, headers, data);
continue;
}
else
{
std::ostringstream contentrange;
contentrange << "Content-Range: bytes */" << filesize;
headers.push_back(contentrange.str());
sendError(client, 416, *m, sendContent, "", headers);
break;
}
}
}
}
addFileHeaders(headers, data);
sendHead(client, 200, headers);
if (sendContent == true)
sendFile(client, headers, data);
}
else if (DirectoryExists(filename) == true)
{
if (filename[filename.length()-1] == '/')
sendDirectoryListing(client, filename, *m, sendContent, headers);
else
sendRedirect(client, 301, filename.append("/"), *m, sendContent);
}
else
sendError(client, 404, *m, sendContent, "", headers);
}
_error->DumpErrors(std::cerr);
messages.clear();
}
close(client);
std::clog << "CLOSE client " << client << std::endl;
return NULL;
}
/*}}}*/
int main(int const argc, const char * argv[])
{
CommandLine::Args Args[] = {
{0, "port", "aptwebserver::port", CommandLine::HasArg},
{0, "request-absolute", "aptwebserver::request::absolute", CommandLine::HasArg},
{0, "authorization", "aptwebserver::authorization", CommandLine::HasArg},
{0, "proxy-authorization", "aptwebserver::proxy-authorization", CommandLine::HasArg},
{'c',"config-file",0,CommandLine::ConfigFile},
{'o',"option",0,CommandLine::ArbItem},
{0,0,0,0}
};
CommandLine CmdL(Args, _config);
if(CmdL.Parse(argc,argv) == false)
{
_error->DumpErrors();
exit(1);
}
// create socket, bind and listen to it {{{
// ignore SIGPIPE, this can happen on write() if the socket closes connection
signal(SIGPIPE, SIG_IGN);
// we don't care for our slaves, so ignore their death
signal(SIGCHLD, SIG_IGN);
int sock = socket(AF_INET6, SOCK_STREAM, 0);
if(sock < 0)
{
_error->Errno("aptwerbserver", "Couldn't create socket");
_error->DumpErrors(std::cerr);
return 1;
}
int const port = _config->FindI("aptwebserver::port", 8080);
// ensure that we accept all connections: v4 or v6
int const iponly = 0;
setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &iponly, sizeof(iponly));
// to not linger on an address
int const enable = 1;
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable));
struct sockaddr_in6 locAddr;
memset(&locAddr, 0, sizeof(locAddr));
locAddr.sin6_family = AF_INET6;
locAddr.sin6_port = htons(port);
locAddr.sin6_addr = in6addr_any;
if (bind(sock, (struct sockaddr*) &locAddr, sizeof(locAddr)) < 0)
{
_error->Errno("aptwerbserver", "Couldn't bind");
_error->DumpErrors(std::cerr);
return 2;
}
FileFd pidfile;
if (_config->FindB("aptwebserver::fork", false) == true)
{
std::string const pidfilename = _config->Find("aptwebserver::pidfile", "aptwebserver.pid");
int const pidfilefd = GetLock(pidfilename);
if (pidfilefd < 0 || pidfile.OpenDescriptor(pidfilefd, FileFd::WriteOnly) == false)
{
_error->Errno("aptwebserver", "Couldn't acquire lock on pidfile '%s'", pidfilename.c_str());
_error->DumpErrors(std::cerr);
return 3;
}
pid_t child = fork();
if (child < 0)
{
_error->Errno("aptwebserver", "Forking failed");
_error->DumpErrors(std::cerr);
return 4;
}
else if (child != 0)
{
// successfully forked: ready to serve!
std::string pidcontent;
strprintf(pidcontent, "%d", child);
pidfile.Write(pidcontent.c_str(), pidcontent.size());
if (_error->PendingError() == true)
{
_error->DumpErrors(std::cerr);
return 5;
}
std::cout << "Successfully forked as " << child << std::endl;
return 0;
}
}
std::clog << "Serving ANY file on port: " << port << std::endl;
int const slaves = _config->FindI("aptwebserver::slaves", SOMAXCONN);
std::cerr << "SLAVES: " << slaves << std::endl;
listen(sock, slaves);
/*}}}*/
_config->CndSet("aptwebserver::response-header::Server", "APT webserver");
_config->CndSet("aptwebserver::response-header::Accept-Ranges", "bytes");
_config->CndSet("aptwebserver::directoryindex", "index.html");
std::list<int> accepted_clients;
while (true)
{
int client = accept(sock, NULL, NULL);
if (client == -1)
{
if (errno == EINTR)
continue;
_error->Errno("accept", "Couldn't accept client on socket %d", sock);
_error->DumpErrors(std::cerr);
return 6;
}
pthread_attr_t attr;
if (pthread_attr_init(&attr) != 0 || pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0)
{
_error->Errno("pthread_attr", "Couldn't set detach attribute for a fresh thread to handle client %d on socket %d", client, sock);
_error->DumpErrors(std::cerr);
close(client);
continue;
}
pthread_t tid;
// thats rather dirty, but we need to store the client socket somewhere safe
accepted_clients.push_front(client);
if (pthread_create(&tid, &attr, &handleClient, &(*accepted_clients.begin())) != 0)
{
_error->Errno("pthread_create", "Couldn't create a fresh thread to handle client %d on socket %d", client, sock);
_error->DumpErrors(std::cerr);
close(client);
continue;
}
}
pidfile.Close();
return 0;
}