#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>
#include <signal.h>
char const * const httpcodeToStr(int const httpcode) /*{{{*/
std::string response("HTTP/1.1 ");
response.append(httpcodeToStr(httpcode));
headers.push_front(response);
+ _config->Set("APTWebserver::Last-Status-Code", httpcode);
- headers.push_back("Server: APT webserver");
+ 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);
- std::clog << ">>> RESPONSE >>>" << std::endl;
+ 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)
{
if (actual == 0)
break;
- if (Success == true)
- Success &= FileFd::Write(client, buffer, actual);
+ Success &= FileFd::Write(client, buffer, actual);
}
- if (Success == true)
- Success &= FileFd::Write(client, "\r\n", 2);
+ if (Success == false)
+ std::cerr << "SENDFILE: READ/WRITE ERROR to " << client << std::endl;
return Success;
}
/*}}}*/
bool sendData(int const client, std::string const &data) /*{{{*/
{
- bool Success = true;
- Success &= FileFd::Write(client, data.c_str(), data.size());
- if (Success == true)
- Success &= FileFd::Write(client, "\r\n", 2);
- return Success;
+ if (FileFd::Write(client, data.c_str(), data.size()) == false)
+ {
+ std::cerr << "SENDDATA: WRITE ERROR to " << client << std::endl;
+ return false;
+ }
+ return true;
}
/*}}}*/
void sendError(int const client, int const httpcode, std::string const &request,/*{{{*/
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>");
+ if (httpcode != 200)
+ {
+ 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>");
+ }
+ else
+ {
+ if (error.empty() == false)
+ response.append("<p><em>Success</em>: ").append(error).append("</p>");
+ response.append("The successfully executed operation was requested by: <pre>");
+ }
response.append(request).append("</pre></body></html>");
addDataHeaders(headers, response);
sendHead(client, httpcode, headers);
if (content == true)
sendData(client, response);
+}
+void sendSuccess(int const client, std::string const &request,
+ bool content, std::string const &error = "")
+{
+ sendError(client, 200, request, content, error);
+}
+ /*}}}*/
+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("/");
+ 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, response);
+}
+ /*}}}*/
+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,
+ std::string &filename, std::string ¶ms, bool &sendContent,
bool &closeConnection)
{
if (strncmp(request.c_str(), "HEAD ", 5) == 0)
sendError(client, 500, request, sendContent, "Filename contains an unencoded space");
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");
+ 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)
+ {
+ if (absolute.find("uri") == std::string::npos)
+ {
+ sendError(client, 400, request, sendContent, "Request is absoluteURI, but configured to not accept that");
+ return false;
+ }
+ // strip the host from the request to make it an absolute path
+ filename.erase(0, host.length());
+ }
+ else if (absolute.find("path") == std::string::npos)
+ {
+ sendError(client, 400, request, sendContent, "Request is absolutePath, but configured to not accept that");
+ 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 …
// nuke the first character which is a / as we assured above
filename.erase(0, 1);
if (filename.empty() == true)
- filename = ".";
+ 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;
}
/*}}}*/
+bool handleOnTheFlyReconfiguration(int const client, std::string const &request, std::vector<std::string> const &parts)/*{{{*/
+{
+ size_t const pcount = parts.size();
+ if (pcount == 4 && parts[1] == "set")
+ {
+ _config->Set(parts[2], parts[3]);
+ sendSuccess(client, request, true, "Option '" + parts[2] + "' was set to '" + parts[3] + "'!");
+ return true;
+ }
+ else if (pcount == 4 && parts[1] == "find")
+ {
+ std::list<std::string> headers;
+ std::string response = _config->Find(parts[2], parts[3]);
+ addDataHeaders(headers, response);
+ sendHead(client, 200, headers);
+ sendData(client, response);
+ return true;
+ }
+ else if (pcount == 3 && parts[1] == "find")
+ {
+ std::list<std::string> headers;
+ if (_config->Exists(parts[2]) == true)
+ {
+ std::string response = _config->Find(parts[2]);
+ addDataHeaders(headers, response);
+ sendHead(client, 200, headers);
+ sendData(client, response);
+ return true;
+ }
+ sendError(client, 404, request, "Requested Configuration option doesn't exist.");
+ return false;
+ }
+ else if (pcount == 3 && parts[1] == "clear")
+ {
+ _config->Clear(parts[2]);
+ sendSuccess(client, request, true, "Option '" + parts[2] + "' was cleared.");
+ return true;
+ }
+
+ sendError(client, 400, request, true, "Unknown on-the-fly configuration request");
+ return false;
+}
+ /*}}}*/
+void * handleClient(void * voidclient) /*{{{*/
+{
+ int client = *((int*)(voidclient));
+ std::clog << "ACCEPT client " << client << std::endl;
+ std::vector<std::string> messages;
+ while (ReadMessages(client, messages))
+ {
+ bool closeConnection = false;
+ 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::list<std::string> headers;
+ std::string filename;
+ std::string params;
+ bool sendContent = true;
+ if (parseFirstLine(client, *m, filename, params, sendContent, closeConnection) == 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);
+ 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);
+ 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);
+ 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 (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, data);
+ continue;
+ }
+ else
+ {
+ headers.push_back("Content-Length: 0");
+ std::ostringstream contentrange;
+ contentrange << "Content-Range: bytes */" << filesize;
+ headers.push_back(contentrange.str());
+ sendHead(client, 416, headers);
+ continue;
+ }
+ }
+ }
+ }
+
+ addFileHeaders(headers, data);
+ sendHead(client, 200, headers);
+ if (sendContent == true)
+ sendFile(client, data);
+ }
+ else if (DirectoryExists(filename) == true)
+ {
+ if (filename[filename.length()-1] == '/')
+ sendDirectoryListing(client, filename, *m, sendContent);
+ else
+ sendRedirect(client, 301, filename.append("/"), *m, sendContent);
+ }
+ else
+ sendError(client, 404, *m, sendContent);
+ }
+ _error->DumpErrors(std::cerr);
+ messages.clear();
+ if (closeConnection == true)
+ break;
+ }
+ 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},
{'c',"config-file",0,CommandLine::ConfigFile},
{'o',"option",0,CommandLine::ArbItem},
{0,0,0,0}
// 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)
{
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;
- listen(sock, 1);
+ int const slaves = _config->FindB("aptwebserver::slaves", SOMAXCONN);
+ listen(sock, slaves);
/*}}}*/
- 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))
- {
- bool closeConnection = false;
- for (std::vector<std::string>::const_iterator m = messages.begin();
- m != messages.end() && closeConnection == false; ++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, closeConnection) == false)
- continue;
+ _config->CndSet("aptwebserver::response-header::Server", "APT webserver");
+ _config->CndSet("aptwebserver::response-header::Accept-Ranges", "bytes");
+ _config->CndSet("aptwebserver::directoryindex", "index.html");
- 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;
- }
+ std::list<int> accepted_clients;
- 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;
- }
- }
+ 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;
+ }
- addFileHeaders(headers, data);
- sendHead(client, 200, headers);
- if (sendContent == true)
- sendFile(client, data);
- }
- else
- sendError(client, 404, *m, sendContent);
- }
+ 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);
- messages.clear();
- if (closeConnection == true)
- break;
+ close(client);
+ continue;
}
- std::clog << "CLOSE client " << client
- << " on socket " << sock << std::endl;
- close(client);
+ 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;
}
projects / apt.git / blobdiff