1096 lines
41 KiB
C++
1096 lines
41 KiB
C++
#include <config.h>
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#include <apt-pkg/cmndline.h>
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#include <apt-pkg/configuration.h>
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#include <apt-pkg/error.h>
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#include <apt-pkg/fileutl.h>
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#include <apt-pkg/strutl.h>
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#include "teestream.h"
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#include <cerrno>
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#include <csignal>
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#include <cstddef>
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#include <cstdlib>
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#include <cstring>
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#include <ctime>
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#include <dirent.h>
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#include <netinet/in.h>
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#include <regex.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <array>
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#include <algorithm>
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#include <fstream>
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#include <iostream>
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#include <list>
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#include <sstream>
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#include <string>
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#include <thread>
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#include <unordered_map>
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#include <vector>
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static std::string HTMLEncode(std::string encode) /*{{{*/
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{
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constexpr std::array<std::array<char const *,2>,6> htmlencode = {{
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{{ "&", "&" }},
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{{ "<", "<" }},
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{{ ">", ">" }},
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{{ "\"", """ }},
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{{ "'", "'" }},
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{{ "/", "/" }},
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}};
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for (auto &&h: htmlencode)
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encode = SubstVar(encode, h[0], h[1]);
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return encode;
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}
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/*}}}*/
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static std::string httpcodeToStr(int const httpcode) /*{{{*/
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{
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switch (httpcode)
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{
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// Informational 1xx
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case 100: return _config->Find("aptwebserver::httpcode::100", "100 Continue");
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case 101: return _config->Find("aptwebserver::httpcode::101", "101 Switching Protocols");
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// Successful 2xx
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case 200: return _config->Find("aptwebserver::httpcode::200", "200 OK");
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case 201: return _config->Find("aptwebserver::httpcode::201", "201 Created");
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case 202: return _config->Find("aptwebserver::httpcode::202", "202 Accepted");
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case 203: return _config->Find("aptwebserver::httpcode::203", "203 Non-Authoritative Information");
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case 204: return _config->Find("aptwebserver::httpcode::204", "204 No Content");
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case 205: return _config->Find("aptwebserver::httpcode::205", "205 Reset Content");
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case 206: return _config->Find("aptwebserver::httpcode::206", "206 Partial Content");
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// Redirections 3xx
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case 300: return _config->Find("aptwebserver::httpcode::300", "300 Multiple Choices");
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case 301: return _config->Find("aptwebserver::httpcode::301", "301 Moved Permanently");
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case 302: return _config->Find("aptwebserver::httpcode::302", "302 Found");
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case 303: return _config->Find("aptwebserver::httpcode::303", "303 See Other");
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case 304: return _config->Find("aptwebserver::httpcode::304", "304 Not Modified");
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case 305: return _config->Find("aptwebserver::httpcode::305", "305 Use Proxy");
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case 307: return _config->Find("aptwebserver::httpcode::307", "307 Temporary Redirect");
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case 308: return _config->Find("aptwebserver::httpcode::308", "308 Permanent Redirect");
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// Client errors 4xx
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case 400: return _config->Find("aptwebserver::httpcode::400", "400 Bad Request");
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case 401: return _config->Find("aptwebserver::httpcode::401", "401 Unauthorized");
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case 402: return _config->Find("aptwebserver::httpcode::402", "402 Payment Required");
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case 403: return _config->Find("aptwebserver::httpcode::403", "403 Forbidden");
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case 404: return _config->Find("aptwebserver::httpcode::404", "404 Not Found");
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case 405: return _config->Find("aptwebserver::httpcode::405", "405 Method Not Allowed");
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case 406: return _config->Find("aptwebserver::httpcode::406", "406 Not Acceptable");
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case 407: return _config->Find("aptwebserver::httpcode::407", "407 Proxy Authentication Required");
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case 408: return _config->Find("aptwebserver::httpcode::408", "408 Request Time-out");
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case 409: return _config->Find("aptwebserver::httpcode::409", "409 Conflict");
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case 410: return _config->Find("aptwebserver::httpcode::410", "410 Gone");
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case 411: return _config->Find("aptwebserver::httpcode::411", "411 Length Required");
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case 412: return _config->Find("aptwebserver::httpcode::412", "412 Precondition Failed");
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case 413: return _config->Find("aptwebserver::httpcode::413", "413 Request Entity Too Large");
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case 414: return _config->Find("aptwebserver::httpcode::414", "414 Request-URI Too Large");
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case 415: return _config->Find("aptwebserver::httpcode::415", "415 Unsupported Media Type");
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case 416: return _config->Find("aptwebserver::httpcode::416", "416 Requested range not satisfiable");
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case 417: return _config->Find("aptwebserver::httpcode::417", "417 Expectation Failed");
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case 418: return _config->Find("aptwebserver::httpcode::418", "418 I'm a teapot");
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// Server error 5xx
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case 500: return _config->Find("aptwebserver::httpcode::500", "500 Internal Server Error");
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case 501: return _config->Find("aptwebserver::httpcode::501", "501 Not Implemented");
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case 502: return _config->Find("aptwebserver::httpcode::502", "502 Bad Gateway");
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case 503: return _config->Find("aptwebserver::httpcode::503", "503 Service Unavailable");
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case 504: return _config->Find("aptwebserver::httpcode::504", "504 Gateway Time-out");
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case 505: return _config->Find("aptwebserver::httpcode::505", "505 HTTP Version not supported");
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}
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std::string codeconf, code;
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strprintf(codeconf, "aptwebserver::httpcode::%i", httpcode);
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strprintf(code, "%i Unknown HTTP code", httpcode);
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return _config->Find(codeconf, code);
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}
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/*}}}*/
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static bool chunkedTransferEncoding(std::list<std::string> const &headers)/*{{{*/
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{
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if (std::find(headers.begin(), headers.end(), "Transfer-Encoding: chunked") != headers.end())
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return true;
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if (_config->FindB("aptwebserver::chunked-transfer-encoding", false) == true)
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return true;
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return false;
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}
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/*}}}*/
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static bool contentTypeSet(std::list<std::string> const &headers) /*{{{*/
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{
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return std::any_of(headers.begin(), headers.end(), [](std::string const &h) { return APT::String::Startswith(h, "Content-Type:"); });
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}
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/*}}}*/
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// contentTypeFromExtension /*{{{*/
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static std::string contentTypeFromExtension(std::string const &ext)
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{
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auto t = _config->Find(std::string("aptwebserver::content-type::by-extension::").append(ext));
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if (APT::String::Startswith(t, "text/"))
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return t.append("; charset=utf-8");
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return t;
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}
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/*}}}*/
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static void addFileHeaders(std::list<std::string> &headers, FileFd &data)/*{{{*/
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{
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if (chunkedTransferEncoding(headers) == false)
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{
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std::ostringstream contentlength;
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contentlength << "Content-Length: " << data.FileSize();
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headers.push_back(contentlength.str());
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}
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if (_config->FindB("aptwebserver::support::last-modified", true) == true)
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{
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std::string lastmodified("Last-Modified: ");
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lastmodified.append(TimeRFC1123(data.ModificationTime(), false));
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headers.push_back(lastmodified);
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}
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if (_config->FindB("aptwebserver::content-type::guess", true) &&
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data.FileSize() != 0 &&
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contentTypeSet(headers) == false)
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{
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std::string const name = data.Name();
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std::string ext{flExtension(name)};
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if (name.empty() == false && ext.empty() == false && name != ext)
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{
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std::transform(ext.begin(), ext.end(), ext.begin(), ::tolower);
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auto const type = contentTypeFromExtension(ext);
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if (type.empty() == false)
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headers.push_back(std::string("Content-Type: ").append(type));
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}
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}
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}
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/*}}}*/
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static void addDataHeaders(std::list<std::string> &headers, std::string &data)/*{{{*/
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{
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if (chunkedTransferEncoding(headers) == false)
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{
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std::ostringstream contentlength;
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contentlength << "Content-Length: " << data.size();
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headers.push_back(contentlength.str());
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}
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}
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/*}}}*/
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static bool sendHead(std::ostream &log, int const client, int const httpcode, std::list<std::string> &headers)/*{{{*/
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{
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std::string response("HTTP/1.1 ");
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response.append(httpcodeToStr(httpcode));
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headers.push_front(response);
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_config->Set("APTWebserver::Last-Status-Code", httpcode);
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std::stringstream buffer;
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auto const empties = _config->FindVector("aptwebserver::empty-response-header");
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for (auto const &e: empties)
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buffer << e << ":" << std::endl;
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_config->Dump(buffer, "aptwebserver::response-header", "%t: %v%n", false);
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std::vector<std::string> addheaders = VectorizeString(buffer.str(), '\n');
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for (std::vector<std::string>::const_iterator h = addheaders.begin(); h != addheaders.end(); ++h)
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headers.push_back(*h);
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std::string date("Date: ");
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date.append(TimeRFC1123(time(NULL), false));
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headers.push_back(date);
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if (chunkedTransferEncoding(headers) == true)
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headers.push_back("Transfer-Encoding: chunked");
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log << ">>> RESPONSE to " << client << " >>>" << std::endl;
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bool Success = true;
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for (std::list<std::string>::const_iterator h = headers.begin();
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Success == true && h != headers.end(); ++h)
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{
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Success &= FileFd::Write(client, h->c_str(), h->size());
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if (Success == true)
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Success &= FileFd::Write(client, "\r\n", 2);
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log << *h << std::endl;
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}
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if (Success == true)
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Success &= FileFd::Write(client, "\r\n", 2);
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log << "<<<<<<<<<<<<<<<<" << std::endl;
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return Success;
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}
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/*}}}*/
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static bool sendFile(int const client, std::list<std::string> const &headers, FileFd &data)/*{{{*/
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{
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bool Success = true;
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bool const chunked = chunkedTransferEncoding(headers);
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char buffer[500];
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unsigned long long actual = 0;
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while ((Success &= data.Read(buffer, sizeof(buffer), &actual)) == true)
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{
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if (actual == 0)
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break;
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if (chunked == true)
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{
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std::string size;
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strprintf(size, "%llX\r\n", actual);
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Success &= FileFd::Write(client, size.c_str(), size.size());
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Success &= FileFd::Write(client, buffer, actual);
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Success &= FileFd::Write(client, "\r\n", strlen("\r\n"));
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}
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else
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Success &= FileFd::Write(client, buffer, actual);
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}
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if (chunked == true)
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{
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char const * const finish = "0\r\n\r\n";
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Success &= FileFd::Write(client, finish, strlen(finish));
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}
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if (Success == false)
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std::cerr << "SENDFILE:" << (chunked ? " CHUNKED" : "") << " READ/WRITE ERROR to " << client << std::endl;
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return Success;
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}
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/*}}}*/
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static bool sendData(int const client, std::list<std::string> const &headers, std::string const &data)/*{{{*/
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{
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if (chunkedTransferEncoding(headers) == true)
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{
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unsigned long long const ullsize = data.length();
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std::string size;
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strprintf(size, "%llX\r\n", ullsize);
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char const * const finish = "\r\n0\r\n\r\n";
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if (FileFd::Write(client, size.c_str(), size.length()) == false ||
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FileFd::Write(client, data.c_str(), ullsize) == false ||
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FileFd::Write(client, finish, strlen(finish)) == false)
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{
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std::cerr << "SENDDATA: CHUNK WRITE ERROR to " << client << std::endl;
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return false;
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}
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}
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else if (FileFd::Write(client, data.c_str(), data.size()) == false)
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{
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std::cerr << "SENDDATA: WRITE ERROR to " << client << std::endl;
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return false;
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}
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return true;
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}
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/*}}}*/
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static void sendError(std::ostream &log, int const client, int const httpcode, std::string const &request,/*{{{*/
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bool const content, std::string const &error, std::list<std::string> &headers)
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{
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auto const quotedCode = HTMLEncode(httpcodeToStr(httpcode));
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std::string response("<!doctype html><html><head><title>");
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response.append(quotedCode).append("</title><meta charset=\"utf-8\" /></head>");
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response.append("<body><h1>").append(quotedCode).append("</h1>");
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if (httpcode != 200)
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response.append("<p><em>Error</em>: ");
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else
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response.append("<p><em>Success</em>: ");
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if (error.empty() == false)
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response.append(HTMLEncode(error));
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else
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response.append(quotedCode);
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if (httpcode != 200)
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response.append("</p>This error is a result of the request: <pre>");
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else
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response.append("The successfully executed operation was requested by: <pre>");
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response.append(HTMLEncode(request)).append("</pre></body></html>");
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if (httpcode != 200)
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{
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if (_config->FindB("aptwebserver::closeOnError", false) == true)
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headers.push_back("Connection: close");
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}
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addDataHeaders(headers, response);
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if (contentTypeSet(headers) == false)
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headers.push_back("Content-Type: text/html; charset=utf-8");
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sendHead(log, client, httpcode, headers);
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if (content == true)
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sendData(client, headers, response);
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}
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static void sendSuccess(std::ostream &log, int const client, std::string const &request,
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bool const content, std::string const &error, std::list<std::string> &headers)
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{
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sendError(log, client, 200, request, content, error, headers);
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}
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/*}}}*/
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static void sendRedirect(std::ostream &log, int const client, int const httpcode,/*{{{*/
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std::string const &uri, std::string const &request, bool content)
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{
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std::list<std::string> headers;
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auto const quotedCode = HTMLEncode(httpcodeToStr(httpcode));
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std::string response("<!doctype html><html><head><title>");
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response.append(quotedCode).append("</title><meta charset=\"utf-8\" /></head>");
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response.append("<body><h1>").append(quotedCode).append("</h1");
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response.append("<p>You should be redirected to <em>").append(HTMLEncode(uri)).append("</em></p>");
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response.append("This page is a result of the request: <pre>");
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response.append(HTMLEncode(request)).append("</pre></body></html>");
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addDataHeaders(headers, response);
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std::string location("Location: ");
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if (strncmp(uri.c_str(), "http://", 7) != 0 && strncmp(uri.c_str(), "https://", 8) != 0)
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{
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std::string const host = LookupTag(request, "Host");
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unsigned int const httpsport = _config->FindI("aptwebserver::port::https", 4433);
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std::string hosthttpsport;
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strprintf(hosthttpsport, ":%u", httpsport);
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if (host.find(hosthttpsport) != std::string::npos)
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location.append("https://");
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else
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location.append("http://");
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location.append(host).append("/");
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if (strncmp("/home/", uri.c_str(), strlen("/home/")) == 0 && uri.find("/public_html/") != std::string::npos)
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{
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std::string homeuri = SubstVar(uri, "/home/", "~");
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homeuri = SubstVar(homeuri, "/public_html/", "/");
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location.append(homeuri);
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}
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else
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location.append(uri);
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}
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else
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location.append(uri);
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headers.push_back(location);
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if (contentTypeSet(headers) == false)
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headers.push_back("Content-Type: text/html; charset=utf-8");
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sendHead(log, client, httpcode, headers);
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if (content == true)
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sendData(client, headers, response);
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}
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/*}}}*/
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static int filter_hidden_files(const struct dirent *a) /*{{{*/
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{
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if (a->d_name[0] == '.')
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return 0;
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#ifdef _DIRENT_HAVE_D_TYPE
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// if we have the d_type check that only files and dirs will be included
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if (a->d_type != DT_UNKNOWN &&
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a->d_type != DT_REG &&
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a->d_type != DT_LNK && // this includes links to regular files
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a->d_type != DT_DIR)
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return 0;
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#endif
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return 1;
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}
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static int grouped_alpha_case_sort(const struct dirent **a, const struct dirent **b) {
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#ifdef _DIRENT_HAVE_D_TYPE
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if ((*a)->d_type == DT_DIR && (*b)->d_type == DT_DIR);
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else if ((*a)->d_type == DT_DIR && (*b)->d_type == DT_REG)
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return -1;
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else if ((*b)->d_type == DT_DIR && (*a)->d_type == DT_REG)
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return 1;
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else
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#endif
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{
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struct stat f_prop; //File's property
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stat((*a)->d_name, &f_prop);
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int const amode = f_prop.st_mode;
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stat((*b)->d_name, &f_prop);
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int const bmode = f_prop.st_mode;
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if (S_ISDIR(amode) && S_ISDIR(bmode));
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else if (S_ISDIR(amode))
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return -1;
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else if (S_ISDIR(bmode))
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return 1;
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}
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return strcasecmp((*a)->d_name, (*b)->d_name);
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}
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/*}}}*/
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static void sendDirectoryListing(std::ostream &log, int const client, std::string const &dir,/*{{{*/
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std::string const &request, bool content, std::list<std::string> &headers)
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{
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struct dirent **namelist;
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int const counter = scandir(dir.c_str(), &namelist, filter_hidden_files, grouped_alpha_case_sort);
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if (counter == -1)
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{
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sendError(log, client, 500, request, content, "scandir failed", headers);
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return;
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}
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std::ostringstream listing;
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std::string const quotedDir = HTMLEncode(dir);
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listing << "<!doctype html><html><head><title>Index of " << quotedDir << "</title><meta charset=\"utf-8\" />"
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<< "<style type=\"text/css\"><!-- td {padding: 0.02em 0.5em 0.02em 0.5em;}"
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<< "tr:nth-child(even){background-color:#dfdfdf;}"
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<< "h1, td:nth-child(3){text-align:center;}"
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<< "table {margin-left:auto;margin-right:auto;} --></style>"
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<< "</head>" << std::endl
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<< "<body><h1>Index of " << quotedDir << "</h1>" << std::endl
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<< "<table><tr><th>#</th><th>Name</th><th>Size</th><th>Last-Modified</th></tr>" << std::endl;
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if (dir != "./")
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listing << "<tr><td>d</td><td><a href=\"..\">Parent Directory</a></td><td>-</td><td>-</td></tr>";
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for (int i = 0; i < counter; ++i) {
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struct stat fs;
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std::string filename(dir);
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filename.append("/").append(namelist[i]->d_name);
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stat(filename.c_str(), &fs);
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|
std::string const quotedHref = QuoteString(namelist[i]->d_name, "\"\\/#?");
|
|
std::string const quotedName = HTMLEncode(namelist[i]->d_name);
|
|
bool const isDir = S_ISDIR(fs.st_mode);
|
|
listing << "<tr><td>" << (isDir ? 'd' : 'f') << "</td>"
|
|
<< "<td><a href=\"./" << quotedHref << (isDir ? "/" : "") <<"\">" << quotedName << "</a></td>"
|
|
<< "<td>" << (isDir ? "-" : SizeToStr(fs.st_size).append("B")) << "</td>"
|
|
<< "<td>" << TimeRFC1123(fs.st_mtime, true) << "</td></tr>\n";
|
|
}
|
|
listing << "</table></body></html>" << std::endl;
|
|
|
|
if (contentTypeSet(headers) == false)
|
|
headers.push_back("Content-Type: text/html; charset=utf-8");
|
|
|
|
std::string response(listing.str());
|
|
addDataHeaders(headers, response);
|
|
sendHead(log, client, 200, headers);
|
|
if (content == true)
|
|
sendData(client, headers, response);
|
|
}
|
|
/*}}}*/
|
|
static bool parseFirstLine(std::ostream &log, int const client, std::string const &request,/*{{{*/
|
|
std::string &filename, std::string ¶ms, 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(log, 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(log, 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(log, client, 500, request, sendContent, "Not an HTTP/1.{0,1} request", headers);
|
|
return false;
|
|
}
|
|
|
|
filename = request.substr(filestart, fileend - filestart);
|
|
if (filename.find(' ') != std::string::npos)
|
|
{
|
|
sendError(log, 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(log, 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(log, 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(log, client, 407, request, sendContent, "Proxy requires authentication", headers);
|
|
else
|
|
sendError(log, 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(log, 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(log, 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(log, 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(log, client, 401, request, sendContent, "Server requires authentication", headers);
|
|
else
|
|
sendError(log, 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(log, client, 401, request, sendContent, "Authentication doesn't match", headers);
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
headers.push_back("WWW-Authenticate: Basic");
|
|
sendError(log, 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);
|
|
}
|
|
else if (APT::String::Startswith(filename, "/_config/"))
|
|
{
|
|
filename.erase(0, 1);
|
|
return true;
|
|
}
|
|
|
|
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(log, 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(std::ostream &log, int const client,/*{{{*/
|
|
std::string const &request, std::vector<std::string> const &EncodedParts, std::list<std::string> &headers)
|
|
{
|
|
size_t const pcount = EncodedParts.size();
|
|
std::vector<std::string> parts(pcount);
|
|
for (size_t i = 0; i < pcount; ++i)
|
|
parts[i] = DeQuoteString(EncodedParts[i]);
|
|
if (pcount == 4 && parts[1] == "set")
|
|
{
|
|
_config->Set(parts[2], parts[3]);
|
|
sendSuccess(log, 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);
|
|
if (contentTypeSet(headers) == false)
|
|
headers.push_back("Content-Type: text/plain; charset=utf-8");
|
|
sendHead(log, 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);
|
|
if (contentTypeSet(headers) == false)
|
|
headers.push_back("Content-Type: text/plain; charset=utf-8");
|
|
sendHead(log, client, 200, headers);
|
|
sendData(client, headers, response);
|
|
return true;
|
|
}
|
|
sendError(log, 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(log, client, request, true, "Option '" + parts[2] + "' was cleared.", headers);
|
|
return true;
|
|
}
|
|
|
|
sendError(log, client, 400, request, true, "Unknown on-the-fly configuration request", headers);
|
|
return false;
|
|
}
|
|
/*}}}*/
|
|
static void * handleClient(int const client, size_t const id) /*{{{*/
|
|
{
|
|
auto logfilepath = _config->FindFile("aptwebserver::logfiles");
|
|
if (logfilepath.empty() == false)
|
|
strprintf(logfilepath, "%s.client-%lu.log", logfilepath.c_str(), id);
|
|
else
|
|
logfilepath = "/dev/null";
|
|
std::ofstream logfile(logfilepath);
|
|
basic_teeostream<char> log(std::clog, logfile);
|
|
|
|
log << "ACCEPT client " << client << std::endl;
|
|
bool closeConnection = false;
|
|
while (closeConnection == false)
|
|
{
|
|
std::vector<std::string> messages;
|
|
if (ReadMessages(client, messages) == false)
|
|
break;
|
|
|
|
std::list<std::string> headers;
|
|
for (std::vector<std::string>::const_iterator m = messages.begin();
|
|
m != messages.end() && closeConnection == false; ++m) {
|
|
// if we announced a closing in previous response, do the close now
|
|
if (std::find(headers.begin(), headers.end(), std::string("Connection: close")) != headers.end())
|
|
{
|
|
closeConnection = true;
|
|
break;
|
|
}
|
|
headers.clear();
|
|
|
|
log << ">>> REQUEST from " << client << " >>>" << std::endl << *m
|
|
<< std::endl << "<<<<<<<<<<<<<<<<" << std::endl;
|
|
std::string filename;
|
|
std::string params;
|
|
bool sendContent = true;
|
|
if (parseFirstLine(log, client, *m, filename, params, sendContent, closeConnection, headers) == false)
|
|
continue;
|
|
|
|
// special webserver command request
|
|
if (filename.length() > 1 && filename[0] == '_')
|
|
{
|
|
auto const parts = VectorizeString(filename, '/');
|
|
if (parts[0] == "_config")
|
|
{
|
|
handleOnTheFlyReconfiguration(log, 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(log, client, _config->FindI("aptwebserver::redirect::httpcode", 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;
|
|
DEFER([&] { regfree(pattern); });
|
|
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(log, 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", std::string{flNotDir(filename)});
|
|
if (filename.find("/") == std::string::npos)
|
|
{
|
|
auto directory = _config->Find("aptwebserver::overwrite::" + I->Tag + "::directory", flNotFile(filename));
|
|
filename = flCombine(directory, filename);
|
|
}
|
|
if (filename.empty() == false && filename[0] == '/')
|
|
filename.erase(0,1);
|
|
if (filename.empty())
|
|
filename = "./";
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// automatic retry can be tested with this
|
|
{
|
|
int failrequests = _config->FindI("aptwebserver::failrequest::" + filename, 0);
|
|
int retryafter = _config->FindI("aptwebserver::failrequest::retryafter", 0);
|
|
if (failrequests != 0)
|
|
{
|
|
--failrequests;
|
|
_config->Set(("aptwebserver::failrequest::" + filename).c_str(), failrequests);
|
|
if (retryafter != 0)
|
|
{
|
|
std::string retryafter_hdr = "Retry-After: " + std::to_string(retryafter);
|
|
headers.push_back(retryafter_hdr);
|
|
}
|
|
sendError(log, client, _config->FindI("aptwebserver::failrequest", 400), *m, sendContent, "Server is configured to fail this file.", headers);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// deal with the request
|
|
unsigned int const httpsport = _config->FindI("aptwebserver::port::https", 4433);
|
|
std::string hosthttpsport;
|
|
strprintf(hosthttpsport, ":%u", httpsport);
|
|
if (_config->FindB("aptwebserver::support::http", true) == false &&
|
|
LookupTag(*m, "Host").find(hosthttpsport) == std::string::npos)
|
|
{
|
|
sendError(log, 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, cache) == true &&
|
|
cache >= data.ModificationTime())
|
|
{
|
|
sendHead(log, 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)
|
|
{
|
|
std::string ranges = ',' + _config->Find("aptwebserver::response-header::Accept-Ranges") + ',';
|
|
ranges.erase(std::remove(ranges.begin(), ranges.end(), ' '), ranges.end());
|
|
if (ranges.find(",bytes,") == std::string::npos)
|
|
{
|
|
// we handle it as an error here because we are a test server - a real one should just ignore it
|
|
sendError(log, client, 400, *m, sendContent, "Client does range requests we don't support", headers);
|
|
continue;
|
|
}
|
|
|
|
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, 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);
|
|
// make sure to send content-range before conent-length
|
|
// as regression test for LP: #1445239
|
|
std::ostringstream contentrange;
|
|
contentrange << "Content-Range: bytes " << filestart << "-"
|
|
<< filesize - 1 << "/" << filesize;
|
|
headers.push_back(contentrange.str());
|
|
std::ostringstream contentlength;
|
|
contentlength << "Content-Length: " << (filesize - filestart);
|
|
headers.push_back(contentlength.str());
|
|
sendHead(log, client, 206, headers);
|
|
if (sendContent == true)
|
|
sendFile(client, headers, data);
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
if (_config->FindB("aptwebserver::support::content-range", true) == true)
|
|
{
|
|
std::ostringstream contentrange;
|
|
contentrange << "Content-Range: bytes */" << filesize;
|
|
headers.push_back(contentrange.str());
|
|
}
|
|
sendError(log, client, 416, *m, sendContent, "", headers);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
addFileHeaders(headers, data);
|
|
sendHead(log, client, 200, headers);
|
|
if (sendContent == true)
|
|
sendFile(client, headers, data);
|
|
}
|
|
else if (DirectoryExists(filename) == true)
|
|
{
|
|
if (filename[filename.length()-1] == '/')
|
|
sendDirectoryListing(log, client, filename, *m, sendContent, headers);
|
|
else
|
|
sendRedirect(log, client, 301, filename.append("/"), *m, sendContent);
|
|
}
|
|
else
|
|
sendError(log, client, 404, *m, sendContent, "", headers);
|
|
}
|
|
|
|
// if we announced a closing in the last response, do the close now
|
|
if (std::find(headers.begin(), headers.end(), std::string("Connection: close")) != headers.end())
|
|
closeConnection = true;
|
|
|
|
if (_error->PendingError() == true)
|
|
break;
|
|
_error->DumpErrors(std::cerr);
|
|
}
|
|
_error->DumpErrors(std::cerr);
|
|
close(client);
|
|
log << "CLOSE client " << client << std::endl;
|
|
return NULL;
|
|
}
|
|
/*}}}*/
|
|
static void loadMimeTypesFile(std::string const &filename) /*{{{*/
|
|
{
|
|
if (FileExists(filename) == false)
|
|
return;
|
|
|
|
std::string line;
|
|
FileFd mimetypes(filename, FileFd::ReadOnly);
|
|
while (mimetypes.ReadLine(line))
|
|
{
|
|
if (line.empty() || line[0] == '#' || line.find_first_not_of(" \t\r") == std::string::npos)
|
|
continue;
|
|
std::transform(line.begin(), line.end(), line.begin(), [](char const c) { return c == ' ' ? '\t' : c; });
|
|
auto l = VectorizeString(line, '\t');
|
|
l.erase(std::remove_if(l.begin(), l.end(), [](std::string const &f) { return f.empty(); }), l.end());
|
|
if (l.size() < 2)
|
|
continue;
|
|
for (size_t i = 1; i < l.size(); ++i)
|
|
if (l[i].empty() == false)
|
|
_config->CndSet(std::string("aptwebserver::content-type::by-extension::").append(l[i]).c_str(), l[0]);
|
|
}
|
|
}
|
|
/*}}}*/
|
|
|
|
int main(int const argc, const char * argv[])
|
|
{
|
|
CommandLine::Args Args[] = {
|
|
{'p', "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},
|
|
{0, "logfiles", "aptwebserver::logfiles", 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);
|
|
}
|
|
|
|
if (_config->FindB("aptwebserver::content-type::mime.types", true))
|
|
{
|
|
if (_config->FindB("aptwebserver::content-type::mime.types::apt", true))
|
|
loadMimeTypesFile("/etc/apt/mime.types");
|
|
|
|
if (_config->FindB("aptwebserver::content-type::mime.types::home", true))
|
|
{
|
|
auto const home = getenv("HOME");
|
|
if (home != nullptr)
|
|
loadMimeTypesFile(flCombine(home, ".mime.types"));
|
|
}
|
|
|
|
if (_config->FindB("aptwebserver::content-type::mime.types::etc", true))
|
|
loadMimeTypesFile("/etc/mime.types");
|
|
}
|
|
|
|
// create socket, bind and listen to it {{{
|
|
// ignore SIGPIPE, this can happen on write() if the socket closes connection
|
|
signal(SIGPIPE, SIG_IGN);
|
|
// ignore worker processes exiting, as we don't want to cause them to stay
|
|
// around as zombies because we're busy.
|
|
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 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;
|
|
}
|
|
|
|
if (port == 0)
|
|
{
|
|
struct sockaddr_in6 addr;
|
|
socklen_t addrlen = sizeof(sockaddr_in6);
|
|
if (getsockname(sock, (struct sockaddr*) &addr, &addrlen) != 0)
|
|
_error->Errno("getsockname", "Could not get chosen port number");
|
|
else
|
|
port = ntohs(addr.sin6_port);
|
|
}
|
|
std::string const portfilename = _config->Find("aptwebserver::portfile", "");
|
|
if (portfilename.empty() == false)
|
|
{
|
|
FileFd portfile(portfilename, FileFd::WriteOnly | FileFd::Create | FileFd::Empty);
|
|
std::string portcontent;
|
|
strprintf(portcontent, "%d", port);
|
|
portfile.Write(portcontent.c_str(), portcontent.size());
|
|
portfile.Sync();
|
|
}
|
|
_config->Set("aptwebserver::port::http", port);
|
|
|
|
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());
|
|
pidfile.Sync();
|
|
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 workers = _config->FindI("aptwebserver::workers", SOMAXCONN);
|
|
std::cerr << "WORKERS: " << workers << std::endl;
|
|
listen(sock, workers);
|
|
/*}}}*/
|
|
|
|
_config->CndSet("aptwebserver::response-header::Server", "APT webserver");
|
|
_config->CndSet("aptwebserver::response-header::Accept-Ranges", "bytes");
|
|
_config->CndSet("aptwebserver::directoryindex", "index.html");
|
|
APT::Configuration::getCompressors();
|
|
|
|
size_t id = 0;
|
|
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;
|
|
}
|
|
|
|
std::thread t(handleClient, client, ++id);
|
|
t.detach();
|
|
}
|
|
pidfile.Close();
|
|
|
|
return 0;
|
|
}
|