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#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 <netinet/in.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <stdlib.h>
char const * const httpcodeToStr(int 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 "Proxy Authentication Required";
case 408: return "Request Time-out";
case 409: return "Conflict";
case 410: return "Gone";
case 411: return "Length Required";
case 412: return "Precondition Failed";
case 413: return "Request Entity Too Large";
case 414: return "Request-URI Too Large";
case 415: return "Unsupported Media Type";
case 416: return "Requested range not satisfiable";
case 417: return "Expectation Failed";
// Server error 5xx
case 500: return "Internal Server Error";
case 501: return "Not Implemented";
case 502: return "Bad Gateway";
case 503: return "Service Unavailable";
case 504: return "Gateway Time-out";
case 505: return "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 client, int httpcode, std::list<std::string> &headers) { /*{{{*/
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 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 client, std::string &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 client, int httpcode, string request, bool content) { /*{{{*/
std::list<std::string> headers;
string response;
if (content == true) {
response.append("<html><head><title>");
response.append(httpcodeToStr(httpcode)).append("</title></head>");
response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1");
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);
sendData(client, response);
} /*}}}*/
int main(int argc, const char *argv[])
{
CommandLine::Args Args[] = {
{0, "simulate-paywall", "aptwebserver::Simulate-Paywall",
CommandLine::Boolean},
{0, "port", "aptwebserver::port", CommandLine::HasArg},
{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;
bool sendContent = true;
if (strncmp(m->c_str(), "HEAD ", 5) == 0)
sendContent = false;
if (strncmp(m->c_str(), "GET ", 4) != 0)
sendError(client, 501, *m, true);
std::string host = LookupTag(*m, "Host", "");
if (host.empty() == true) {
// RFC 2616 §14.23 Host
sendError(client, 400, *m, sendContent);
continue;
}
size_t const filestart = m->find(' ', 5);
string filename = m->substr(5, filestart - 5);
if (simulate_broken_server == true) {
string data("ni ni ni\n");
addDataHeaders(headers, data);
sendHead(client, 200, headers);
sendData(client, data);
}
else if (RealFileExists(filename) == false)
sendError(client, 404, *m, sendContent);
else {
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()) {
sendError(client, 304, *m, false);
continue;
}
}
addFileHeaders(headers, data);
sendHead(client, 200, headers);
if (sendContent == true)
sendFile(client, data);
}
}
_error->DumpErrors(std::cerr);
messages.clear();
}
std::clog << "CLOSE client " << client
<< " on socket " << sock << std::endl;
close(client);
}
return 0;
}
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