[apt.git] / test / interactive-helper / aptwebserver.cc

#include <config.h>

#include <apt-pkg/strutl.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/error.h>
#include <apt-pkg/cmndline.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/init.h>

#include <vector>
#include <string>
#include <list>
#include <sstream>

#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <stdlib.h>
#include <dirent.h>

char const * const httpcodeToStr(int const httpcode) {			/*{{{*/
   switch (httpcode) {
      // Informational 1xx
      case 100: return "100 Continue";
      case 101: return "101 Switching Protocols";
      // Successful 2xx
      case 200: return "200 OK";
      case 201: return "201 Created";
      case 202: return "202 Accepted";
      case 203: return "203 Non-Authoritative Information";
      case 204: return "204 No Content";
      case 205: return "205 Reset Content";
      case 206: return "206 Partial Conent";
      // Redirections 3xx
      case 300: return "300 Multiple Choices";
      case 301: return "301 Moved Permanently";
      case 302: return "302 Found";
      case 303: return "303 See Other";
      case 304: return "304 Not Modified";
      case 305: return "304 Use Proxy";
      case 307: return "307 Temporary Redirect";
      // Client errors 4xx
      case 400: return "400 Bad Request";
      case 401: return "401 Unauthorized";
      case 402: return "402 Payment Required";
      case 403: return "403 Forbidden";
      case 404: return "404 Not Found";
      case 405: return "405 Method Not Allowed";
      case 406: return "406 Not Acceptable";
      case 407: return "407 Proxy Authentication Required";
      case 408: return "408 Request Time-out";
      case 409: return "409 Conflict";
      case 410: return "410 Gone";
      case 411: return "411 Length Required";
      case 412: return "412 Precondition Failed";
      case 413: return "413 Request Entity Too Large";
      case 414: return "414 Request-URI Too Large";
      case 415: return "415 Unsupported Media Type";
      case 416: return "416 Requested range not satisfiable";
      case 417: return "417 Expectation Failed";
      // Server error 5xx
      case 500: return "500 Internal Server Error";
      case 501: return "501 Not Implemented";
      case 502: return "502 Bad Gateway";
      case 503: return "503 Service Unavailable";
      case 504: return "504 Gateway Time-out";
      case 505: return "505 HTTP Version not supported";
   }
   return NULL;
}
									/*}}}*/
void addFileHeaders(std::list<std::string> &headers, FileFd &data) {	/*{{{*/
   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);
}
									/*}}}*/
void addDataHeaders(std::list<std::string> &headers, std::string &data) {/*{{{*/
   std::ostringstream contentlength;
   contentlength << "Content-Length: " << data.size();
   headers.push_back(contentlength.str());
}
									/*}}}*/
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);

   headers.push_back("Server: APT webserver");

   std::string date("Date: ");
   date.append(TimeRFC1123(time(NULL)));
   headers.push_back(date);

   std::clog << ">>> RESPONSE >>>" << 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());
      Success &= FileFd::Write(client, "\r\n", 2);
      std::clog << *h << std::endl;
   }
   Success &= FileFd::Write(client, "\r\n", 2);
   std::clog << "<<<<<<<<<<<<<<<<" << std::endl;
   return Success;
}
									/*}}}*/
bool sendFile(int const client, FileFd &data) {				/*{{{*/
   bool Success = true;
   char buffer[500];
   unsigned long long actual = 0;
   while ((Success &= data.Read(buffer, sizeof(buffer), &actual)) == true) {
      if (actual == 0)
	 break;
      Success &= FileFd::Write(client, buffer, actual);
   }
   Success &= FileFd::Write(client, "\r\n", 2);
   return Success;
}
									/*}}}*/
bool sendData(int const client, std::string const &data) {		/*{{{*/
   bool Success = true;
   Success &= FileFd::Write(client, data.c_str(), data.size());
   Success &= FileFd::Write(client, "\r\n", 2);
   return Success;
}
									/*}}}*/
void sendError(int const client, int const httpcode, std::string const &request, bool 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 (error.empty() == false)
      response.append("<p><em>Error</em>: ").append(error).append("</p>");
   response.append("This error is a result of the request: <pre>");
   response.append(request).append("</pre></body></html>");
   addDataHeaders(headers, response);
   sendHead(client, httpcode, headers);
   if (content == true)
      sendData(client, response);
}
									/*}}}*/
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)
      location.append("http://").append(LookupTag(request, "Host")).append("/").append(uri);
   else
      location.append(uri);
   headers.push_back(location);
   sendHead(client, httpcode, headers);
   if (content == true)
      sendData(client, response);
}
									/*}}}*/
// sendDirectoryLisiting						/*{{{*/
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;
}
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);
}
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);
      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, response);
}
									/*}}}*/
bool parseFirstLine(int const client, std::string const &request, std::string &filename, bool &sendContent) { /*{{{*/
   if (strncmp(request.c_str(), "HEAD ", 5) == 0)
      sendContent = false;
   if (strncmp(request.c_str(), "GET ", 4) != 0)
   {
      sendError(client, 501, request, true);
      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");
      return false;
   }

   size_t httpstart = fileend;
   for (; request[httpstart] == ' '; ++httpstart);
   if (strncmp(request.c_str() + httpstart, "HTTP/1.1\r", 9) != 0) {
      sendError(client, 500, request, sendContent, "Not an HTTP/1.1 request");
      return false;
   }

   filename = request.substr(filestart, fileend - filestart);
   if (filename.find(' ') != std::string::npos) {
      sendError(client, 500, request, sendContent, "Filename contains an unencoded space");
      return false;
   }
   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) {
      sendError(client, 400, request, sendContent, "Filename contains illegal character (sequence)");
      return false;
   }

   // nuke the first character which is a / as we assured above
   filename.erase(0, 1);
   if (filename.empty() == true)
      filename = ".";
   return true;
}
									/*}}}*/
int main(int const argc, const char * argv[])
{
   CommandLine::Args Args[] = {
      {0, "simulate-paywall", "aptwebserver::Simulate-Paywall",
       CommandLine::Boolean},
      {0, "port", "aptwebserver::port", 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 {{{
   int sock = socket(AF_INET6, SOCK_STREAM, 0);
   if(sock < 0 ) {
      _error->Errno("aptwerbserver", "Couldn't create socket");
      _error->DumpErrors(std::cerr);
      return 1;
   }

   // get the port
   int const port = _config->FindI("aptwebserver::port", 8080);
   bool const simulate_broken_server = _config->FindB("aptwebserver::Simulate-Paywall", false);

   // 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 to 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;
   }

   if (simulate_broken_server) {
      std::clog << "Simulating a broken web server that return nonsense "
                   "for all querries" << std::endl;
   } else {
      std::clog << "Serving ANY file on port: " << port << std::endl;
   }

   listen(sock, 1);
   /*}}}*/

   std::vector<std::string> messages;
   int client;
   while ((client = accept(sock, NULL, NULL)) != -1) {
      std::clog << "ACCEPT client " << client
		<< " on socket " << sock << std::endl;

      while (ReadMessages(client, messages)) {
	 for (std::vector<std::string>::const_iterator m = messages.begin();
	      m != messages.end(); ++m) {
	    std::clog << ">>> REQUEST >>>>" << std::endl << *m
		      << std::endl << "<<<<<<<<<<<<<<<<" << std::endl;

	    std::list<std::string> headers;
	    std::string filename;
	    bool sendContent = true;
	    if (parseFirstLine(client, *m, filename, sendContent) == false)
	       continue;

	    std::string host = LookupTag(*m, "Host", "");
	    if (host.empty() == true) {
	       // RFC 2616 §14.23 requires Host
	       sendError(client, 400, *m, sendContent, "Host header is required");
	       continue;
	    }

	    if (simulate_broken_server == true) {
	       std::string data("ni ni ni\n");
	       addDataHeaders(headers, data);
	       sendHead(client, 200, headers);
	       sendData(client, data);
	    }
	    else if (RealFileExists(filename) == true) {
	       FileFd data(filename, FileFd::ReadOnly);
	       std::string condition = LookupTag(*m, "If-Modified-Since", "");
	       if (condition.empty() == false) {
		  time_t cache;
		  if (RFC1123StrToTime(condition.c_str(), cache) == true &&
		      cache >= data.ModificationTime()) {
		     sendHead(client, 304, headers);
		     continue;
		  }
	       }
	       addFileHeaders(headers, data);
	       sendHead(client, 200, headers);
	       if (sendContent == true)
		  sendFile(client, data);
	    }
	    else if (DirectoryExists(filename) == true) {
	       if (filename == "." || filename[filename.length()-1] == '/')
		  sendDirectoryListing(client, filename, *m, sendContent);
	       else
		  sendRedirect(client, 301, filename.append("/"), *m, sendContent);
	    }
	    else
	    {
	       ::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);
		  redirect.erase(0,1);
		  if (redirect != filename) {
		     sendRedirect(client, 301, redirect, *m, sendContent);
		     continue;
		  }
	       }
	       sendError(client, 404, *m, sendContent);
	    }
	 }
	 _error->DumpErrors(std::cerr);
	 messages.clear();
      }

      std::clog << "CLOSE client " << client
		<< " on socket " << sock << std::endl;
      close(client);
   }
   return 0;
}
Commit	Line	Data
4958ba98 DK	1	#include <config.h>
4958ba98 DK	2
e6cd40dc DK	3	#include <apt-pkg/strutl.h>
	4	#include <apt-pkg/fileutl.h>
	5	#include <apt-pkg/error.h>
	6	#include <apt-pkg/cmndline.h>
90d1d54e MV	7	#include <apt-pkg/configuration.h>
90d1d54e MV	8	#include <apt-pkg/init.h>
e6cd40dc DK	9
	10	#include <vector>
	11	#include <string>
	12	#include <list>
	13	#include <sstream>
	14
	15	#include <sys/socket.h>
	16	#include <sys/types.h>
d6405329	17	#include <sys/stat.h>
e6cd40dc DK	18	#include <netinet/in.h>
	19	#include <unistd.h>
	20	#include <errno.h>
	21	#include <time.h>
	22	#include <stdlib.h>
d6405329	23	#include <dirent.h>
e6cd40dc	24
dc57a59b	25	char const * const httpcodeToStr(int const httpcode) { /{{{/
e6cd40dc DK	26	switch (httpcode) {
	27	// Informational 1xx
	28	case 100: return "100 Continue";
	29	case 101: return "101 Switching Protocols";
	30	// Successful 2xx
	31	case 200: return "200 OK";
	32	case 201: return "201 Created";
	33	case 202: return "202 Accepted";
	34	case 203: return "203 Non-Authoritative Information";
	35	case 204: return "204 No Content";
	36	case 205: return "205 Reset Content";
	37	case 206: return "206 Partial Conent";
	38	// Redirections 3xx
	39	case 300: return "300 Multiple Choices";
	40	case 301: return "301 Moved Permanently";
	41	case 302: return "302 Found";
	42	case 303: return "303 See Other";
	43	case 304: return "304 Not Modified";
	44	case 305: return "304 Use Proxy";
	45	case 307: return "307 Temporary Redirect";
	46	// Client errors 4xx
	47	case 400: return "400 Bad Request";
	48	case 401: return "401 Unauthorized";
	49	case 402: return "402 Payment Required";
	50	case 403: return "403 Forbidden";
	51	case 404: return "404 Not Found";
	52	case 405: return "405 Method Not Allowed";
	53	case 406: return "406 Not Acceptable";
7a1bed9d DK	54	case 407: return "407 Proxy Authentication Required";
	55	case 408: return "408 Request Time-out";
	56	case 409: return "409 Conflict";
	57	case 410: return "410 Gone";
	58	case 411: return "411 Length Required";
	59	case 412: return "412 Precondition Failed";
	60	case 413: return "413 Request Entity Too Large";
	61	case 414: return "414 Request-URI Too Large";
	62	case 415: return "415 Unsupported Media Type";
	63	case 416: return "416 Requested range not satisfiable";
	64	case 417: return "417 Expectation Failed";
e6cd40dc	65	// Server error 5xx
7a1bed9d DK	66	case 500: return "500 Internal Server Error";
	67	case 501: return "501 Not Implemented";
	68	case 502: return "502 Bad Gateway";
	69	case 503: return "503 Service Unavailable";
	70	case 504: return "504 Gateway Time-out";
	71	case 505: return "505 HTTP Version not supported";
e6cd40dc DK	72	}
e6cd40dc DK	73	return NULL;
dc57a59b DK	74	}
	75	/}}}/
	76	void addFileHeaders(std::list<std::string> &headers, FileFd &data) { /{{{/
e6cd40dc DK	77	std::ostringstream contentlength;
	78	contentlength << "Content-Length: " << data.FileSize();
	79	headers.push_back(contentlength.str());
	80
	81	std::string lastmodified("Last-Modified: ");
	82	lastmodified.append(TimeRFC1123(data.ModificationTime()));
	83	headers.push_back(lastmodified);
dc57a59b DK	84	}
dc57a59b DK	85	/}}}/
a38a00b9 MV	86	void addDataHeaders(std::list<std::string> &headers, std::string &data) {/{{{/
	87	std::ostringstream contentlength;
	88	contentlength << "Content-Length: " << data.size();
	89	headers.push_back(contentlength.str());
dc57a59b DK	90	}
	91	/}}}/
	92	bool sendHead(int const client, int const httpcode, std::list<std::string> &headers) { /{{{/
4958ba98	93	std::string response("HTTP/1.1 ");
e6cd40dc DK	94	response.append(httpcodeToStr(httpcode));
	95	headers.push_front(response);
	96
	97	headers.push_back("Server: APT webserver");
	98
	99	std::string date("Date: ");
	100	date.append(TimeRFC1123(time(NULL)));
	101	headers.push_back(date);
	102
	103	std::clog << ">>> RESPONSE >>>" << std::endl;
	104	bool Success = true;
	105	for (std::list<std::string>::const_iterator h = headers.begin();
	106	Success == true && h != headers.end(); ++h) {
	107	Success &= FileFd::Write(client, h->c_str(), h->size());
	108	Success &= FileFd::Write(client, "\r\n", 2);
	109	std::clog << *h << std::endl;
	110	}
	111	Success &= FileFd::Write(client, "\r\n", 2);
	112	std::clog << "<<<<<<<<<<<<<<<<" << std::endl;
	113	return Success;
dc57a59b DK	114	}
	115	/}}}/
	116	bool sendFile(int const client, FileFd &data) { /{{{/
e6cd40dc DK	117	bool Success = true;
	118	char buffer[500];
	119	unsigned long long actual = 0;
	120	while ((Success &= data.Read(buffer, sizeof(buffer), &actual)) == true) {
	121	if (actual == 0)
	122	break;
	123	Success &= FileFd::Write(client, buffer, actual);
	124	}
	125	Success &= FileFd::Write(client, "\r\n", 2);
	126	return Success;
dc57a59b DK	127	}
	128	/}}}/
	129	bool sendData(int const client, std::string const &data) { /{{{/
e6cd40dc DK	130	bool Success = true;
	131	Success &= FileFd::Write(client, data.c_str(), data.size());
	132	Success &= FileFd::Write(client, "\r\n", 2);
	133	return Success;
dc57a59b DK	134	}
dc57a59b DK	135	/}}}/
7a1bed9d	136	void sendError(int const client, int const httpcode, std::string const &request, bool content, std::string const &error = "") { /{{{/
e6cd40dc	137	std::list<std::string> headers;
4958ba98	138	std::string response("<html><head><title>");
dc57a59b	139	response.append(httpcodeToStr(httpcode)).append("</title></head>");
d37911ac	140	response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1>");
7a1bed9d DK	141	if (error.empty() == false)
7a1bed9d DK	142	response.append("<p><em>Error</em>: ").append(error).append("</p>");
dc57a59b DK	143	response.append("This error is a result of the request: <pre>");
	144	response.append(request).append("</pre></body></html>");
	145	addDataHeaders(headers, response);
e6cd40dc	146	sendHead(client, httpcode, headers);
dc57a59b DK	147	if (content == true)
	148	sendData(client, response);
	149	}
	150	/}}}/
64a28515 DK	151	void sendRedirect(int const client, int const httpcode, std::string const &uri, std::string const &request, bool content) { /{{{/
	152	std::list<std::string> headers;
	153	std::string response("<html><head><title>");
	154	response.append(httpcodeToStr(httpcode)).append("</title></head>");
	155	response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1");
	156	response.append("<p>You should be redirected to <em>").append(uri).append("</em></p>");
	157	response.append("This page is a result of the request: <pre>");
	158	response.append(request).append("</pre></body></html>");
	159	addDataHeaders(headers, response);
	160	std::string location("Location: ");
	161	if (strncmp(uri.c_str(), "http://", 7) != 0)
	162	location.append("http://").append(LookupTag(request, "Host")).append("/").append(uri);
	163	else
	164	location.append(uri);
	165	headers.push_back(location);
	166	sendHead(client, httpcode, headers);
	167	if (content == true)
	168	sendData(client, response);
	169	}
	170	/}}}/
d6405329 DK	171	// sendDirectoryLisiting /{{{/
	172	int filter_hidden_files(const struct dirent *a) {
	173	if (a->d_name[0] == '.')
	174	return 0;
	175	#ifdef _DIRENT_HAVE_D_TYPE
	176	// if we have the d_type check that only files and dirs will be included
	177	if (a->d_type != DT_UNKNOWN &&
	178	a->d_type != DT_REG &&
	179	a->d_type != DT_LNK && // this includes links to regular files
	180	a->d_type != DT_DIR)
	181	return 0;
	182	#endif
	183	return 1;
	184	}
	185	int grouped_alpha_case_sort(const struct dirent a, const struct dirent b) {
	186	#ifdef _DIRENT_HAVE_D_TYPE
	187	if ((a)->d_type == DT_DIR && (b)->d_type == DT_DIR);
	188	else if ((a)->d_type == DT_DIR && (b)->d_type == DT_REG)
	189	return -1;
	190	else if ((b)->d_type == DT_DIR && (a)->d_type == DT_REG)
	191	return 1;
	192	else
	193	#endif
	194	{
	195	struct stat f_prop; //File's property
	196	stat((*a)->d_name, &f_prop);
	197	int const amode = f_prop.st_mode;
	198	stat((*b)->d_name, &f_prop);
	199	int const bmode = f_prop.st_mode;
	200	if (S_ISDIR(amode) && S_ISDIR(bmode));
	201	else if (S_ISDIR(amode))
	202	return -1;
	203	else if (S_ISDIR(bmode))
	204	return 1;
	205	}
	206	return strcasecmp((a)->d_name, (b)->d_name);
	207	}
4958ba98	208	void sendDirectoryListing(int const client, std::string const &dir, std::string const &request, bool content) {
d6405329 DK	209	std::list<std::string> headers;
	210	std::ostringstream listing;
	211
	212	struct dirent **namelist;
	213	int const counter = scandir(dir.c_str(), &namelist, filter_hidden_files, grouped_alpha_case_sort);
	214	if (counter == -1) {
	215	sendError(client, 500, request, content);
	216	return;
	217	}
	218
	219	listing << "<html><head><title>Index of " << dir << "</title>"
	220	<< "<style type=\"text/css\"><!-- td {padding: 0.02em 0.5em 0.02em 0.5em;}"
	221	<< "tr:nth-child(even){background-color:#dfdfdf;}"
	222	<< "h1, td:nth-child(3){text-align:center;}"
	223	<< "table {margin-left:auto;margin-right:auto;} --></style>"
	224	<< "</head>" << std::endl
	225	<< "<body><h1>Index of " << dir << "</h1>" << std::endl
	226	<< "<table><tr><th>#</th><th>Name</th><th>Size</th><th>Last-Modified</th></tr>" << std::endl;
	227	if (dir != ".")
	228	listing << "<tr><td>d</td><td><a href=\"..\">Parent Directory</a></td><td>-</td><td>-</td></tr>";
	229	for (int i = 0; i < counter; ++i) {
	230	struct stat fs;
	231	std::string filename(dir);
	232	filename.append("/").append(namelist[i]->d_name);
	233	stat(filename.c_str(), &fs);
64a28515 DK	234	if (S_ISDIR(fs.st_mode)) {
	235	listing << "<tr><td>d</td>"
	236	<< "<td><a href=\"" << namelist[i]->d_name << "/\">" << namelist[i]->d_name << "</a></td>"
	237	<< "<td>-</td>";
	238	} else {
	239	listing << "<tr><td>f</td>"
	240	<< "<td><a href=\"" << namelist[i]->d_name << "\">" << namelist[i]->d_name << "</a></td>"
	241	<< "<td>" << SizeToStr(fs.st_size) << "B</td>";
	242	}
d6405329 DK	243	listing << "<td>" << TimeRFC1123(fs.st_mtime) << "</td></tr>" << std::endl;
	244	}
	245	listing << "</table></body></html>" << std::endl;
	246
	247	std::string response(listing.str());
	248	addDataHeaders(headers, response);
	249	sendHead(client, 200, headers);
	250	if (content == true)
	251	sendData(client, response);
	252	}
	253	/}}}/
7a1bed9d DK	254	bool parseFirstLine(int const client, std::string const &request, std::string &filename, bool &sendContent) { /{{{/
	255	if (strncmp(request.c_str(), "HEAD ", 5) == 0)
	256	sendContent = false;
	257	if (strncmp(request.c_str(), "GET ", 4) != 0)
	258	{
	259	sendError(client, 501, request, true);
	260	return false;
	261	}
	262
	263	size_t const lineend = request.find('\n');
	264	size_t filestart = request.find(' ');
	265	for (; request[filestart] == ' '; ++filestart);
	266	size_t fileend = request.rfind(' ', lineend);
	267	if (lineend == std::string::npos \|\| filestart == std::string::npos \|\|
	268	fileend == std::string::npos \|\| filestart == fileend) {
	269	sendError(client, 500, request, sendContent, "Filename can't be extracted");
	270	return false;
	271	}
	272
	273	size_t httpstart = fileend;
	274	for (; request[httpstart] == ' '; ++httpstart);
	275	if (strncmp(request.c_str() + httpstart, "HTTP/1.1\r", 9) != 0) {
	276	sendError(client, 500, request, sendContent, "Not an HTTP/1.1 request");
	277	return false;
	278	}
	279
	280	filename = request.substr(filestart, fileend - filestart);
	281	if (filename.find(' ') != std::string::npos) {
	282	sendError(client, 500, request, sendContent, "Filename contains an unencoded space");
	283	return false;
	284	}
	285	filename = DeQuoteString(filename);
	286
	287	// this is not a secure server, but at least prevent the obvious …
	288	if (filename.empty() == true \|\| filename[0] != '/' \|\|
	289	strncmp(filename.c_str(), "//", 2) == 0 \|\|
	290	filename.find_first_of("\r\n\t\f\v") != std::string::npos \|\|
	291	filename.find("/../") != std::string::npos) {
	292	sendError(client, 400, request, sendContent, "Filename contains illegal character (sequence)");
	293	return false;
	294	}
	295
	296	// nuke the first character which is a / as we assured above
	297	filename.erase(0, 1);
	298	if (filename.empty() == true)
	299	filename = ".";
	300	return true;
	301	}
	302	/}}}/
dc57a59b	303	int main(int const argc, const char * argv[])
e6cd40dc	304	{
90d1d54e	305	CommandLine::Args Args[] = {
dc57a59b	306	{0, "simulate-paywall", "aptwebserver::Simulate-Paywall",
90d1d54e MV	307	CommandLine::Boolean},
90d1d54e MV	308	{0, "port", "aptwebserver::port", CommandLine::HasArg},
d37911ac DK	309	{'c',"config-file",0,CommandLine::ConfigFile},
d37911ac DK	310	{'o',"option",0,CommandLine::ArbItem},
90d1d54e MV	311	{0,0,0,0}
	312	};
	313
	314	CommandLine CmdL(Args, _config);
3ce22d4f	315	if(CmdL.Parse(argc,argv) == false) {
90d1d54e MV	316	_error->DumpErrors();
	317	exit(1);
	318	}
	319
e6cd40dc DK	320	// create socket, bind and listen to it {{{
	321	int sock = socket(AF_INET6, SOCK_STREAM, 0);
	322	if(sock < 0 ) {
	323	_error->Errno("aptwerbserver", "Couldn't create socket");
	324	_error->DumpErrors(std::cerr);
	325	return 1;
	326	}
	327
90d1d54e MV	328	// get the port
	329	int const port = _config->FindI("aptwebserver::port", 8080);
	330	bool const simulate_broken_server = _config->FindB("aptwebserver::Simulate-Paywall", false);
	331
e6cd40dc DK	332	// ensure that we accept all connections: v4 or v6
	333	int const iponly = 0;
	334	setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &iponly, sizeof(iponly));
	335	// to not linger to an address
	336	int const enable = 1;
	337	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable));
	338
	339	struct sockaddr_in6 locAddr;
	340	memset(&locAddr, 0, sizeof(locAddr));
	341	locAddr.sin6_family = AF_INET6;
90d1d54e	342	locAddr.sin6_port = htons(port);
e6cd40dc DK	343	locAddr.sin6_addr = in6addr_any;
	344
	345	if (bind(sock, (struct sockaddr*) &locAddr, sizeof(locAddr)) < 0) {
	346	_error->Errno("aptwerbserver", "Couldn't bind");
	347	_error->DumpErrors(std::cerr);
	348	return 2;
	349	}
	350
90d1d54e MV	351	if (simulate_broken_server) {
	352	std::clog << "Simulating a broken web server that return nonsense "
	353	"for all querries" << std::endl;
	354	} else {
	355	std::clog << "Serving ANY file on port: " << port << std::endl;
	356	}
	357
e6cd40dc	358	listen(sock, 1);
dc57a59b	359	/}}}/
e6cd40dc DK	360
	361	std::vector<std::string> messages;
	362	int client;
	363	while ((client = accept(sock, NULL, NULL)) != -1) {
90d1d54e	364	std::clog << "ACCEPT client " << client
dc57a59b	365	<< " on socket " << sock << std::endl;
e6cd40dc DK	366
	367	while (ReadMessages(client, messages)) {
	368	for (std::vector<std::string>::const_iterator m = messages.begin();
	369	m != messages.end(); ++m) {
dc57a59b DK	370	std::clog << ">>> REQUEST >>>>" << std::endl << *m
dc57a59b DK	371	<< std::endl << "<<<<<<<<<<<<<<<<" << std::endl;
7a1bed9d	372
e6cd40dc	373	std::list<std::string> headers;
7a1bed9d	374	std::string filename;
e6cd40dc	375	bool sendContent = true;
7a1bed9d DK	376	if (parseFirstLine(client, *m, filename, sendContent) == false)
7a1bed9d DK	377	continue;
e6cd40dc DK	378
	379	std::string host = LookupTag(*m, "Host", "");
	380	if (host.empty() == true) {
7a1bed9d DK	381	// RFC 2616 §14.23 requires Host
7a1bed9d DK	382	sendError(client, 400, *m, sendContent, "Host header is required");
e6cd40dc DK	383	continue;
	384	}
	385
dc57a59b	386	if (simulate_broken_server == true) {
4958ba98	387	std::string data("ni ni ni\n");
dc57a59b DK	388	addDataHeaders(headers, data);
	389	sendHead(client, 200, headers);
	390	sendData(client, data);
	391	}
d6405329	392	else if (RealFileExists(filename) == true) {
e6cd40dc DK	393	FileFd data(filename, FileFd::ReadOnly);
	394	std::string condition = LookupTag(*m, "If-Modified-Since", "");
	395	if (condition.empty() == false) {
	396	time_t cache;
dc57a59b DK	397	if (RFC1123StrToTime(condition.c_str(), cache) == true &&
dc57a59b DK	398	cache >= data.ModificationTime()) {
d6405329	399	sendHead(client, 304, headers);
e6cd40dc DK	400	continue;
	401	}
	402	}
	403	addFileHeaders(headers, data);
	404	sendHead(client, 200, headers);
	405	if (sendContent == true)
	406	sendFile(client, data);
	407	}
d6405329	408	else if (DirectoryExists(filename) == true) {
64a28515 DK	409	if (filename == "." \|\| filename[filename.length()-1] == '/')
	410	sendDirectoryListing(client, filename, *m, sendContent);
	411	else
	412	sendRedirect(client, 301, filename.append("/"), *m, sendContent);
d6405329 DK	413	}
d6405329 DK	414	else
d37911ac DK	415	{
	416	::Configuration::Item const *Replaces = _config->Tree("aptwebserver::redirect::replace");
	417	if (Replaces != NULL) {
	418	std::string redirect = "/" + filename;
	419	for (::Configuration::Item *I = Replaces->Child; I != NULL; I = I->Next)
	420	redirect = SubstVar(redirect, I->Tag, I->Value);
	421	redirect.erase(0,1);
	422	if (redirect != filename) {
	423	sendRedirect(client, 301, redirect, *m, sendContent);
	424	continue;
	425	}
	426	}
	427	sendError(client, 404, *m, sendContent);
	428	}
e6cd40dc DK	429	}
	430	_error->DumpErrors(std::cerr);
	431	messages.clear();
da3ebfe7	432	}
a38a00b9	433
dc57a59b DK	434	std::clog << "CLOSE client " << client
dc57a59b DK	435	<< " on socket " << sock << std::endl;
a38a00b9	436	close(client);
e6cd40dc DK	437	}
	438	return 0;
	439	}