mirror of https://github.com/PurpleI2P/i2pd.git
chertov
11 years ago
11 changed files with 484 additions and 58 deletions
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#include <boost/bind.hpp> |
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#include <boost/lexical_cast.hpp> |
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#include "base64.h" |
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#include "Log.h" |
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#include "Tunnel.h" |
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#include "TransitTunnel.h" |
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#include "Transports.h" |
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#include "NetDb.h" |
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#include "Streaming.h" |
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#include "HTTPProxy.h" |
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namespace i2p |
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{ |
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namespace proxy |
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{ |
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namespace misc_strings |
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{ |
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const char name_value_separator[] = { ':', ' ' }; |
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const char crlf[] = { '\r', '\n' }; |
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} // namespace misc_strings
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std::vector<boost::asio::const_buffer> HTTPConnection::reply::to_buffers() |
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{ |
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std::vector<boost::asio::const_buffer> buffers; |
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if (headers.size () > 0) |
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{ |
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buffers.push_back (boost::asio::buffer ("HTTP/1.0 200 OK\r\n")); // always OK
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for (std::size_t i = 0; i < headers.size(); ++i) |
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{ |
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header& h = headers[i]; |
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buffers.push_back(boost::asio::buffer(h.name)); |
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buffers.push_back(boost::asio::buffer(misc_strings::name_value_separator)); |
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buffers.push_back(boost::asio::buffer(h.value)); |
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buffers.push_back(boost::asio::buffer(misc_strings::crlf)); |
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} |
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buffers.push_back(boost::asio::buffer(misc_strings::crlf)); |
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} |
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buffers.push_back(boost::asio::buffer(content)); |
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return buffers; |
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} |
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void HTTPConnection::Terminate () |
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{ |
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m_Socket->close (); |
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delete this; |
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} |
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void HTTPConnection::Receive () |
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{ |
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m_Socket->async_read_some (boost::asio::buffer (m_Buffer, 8192), |
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boost::bind(&HTTPConnection::HandleReceive, this, |
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boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); |
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} |
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void HTTPConnection::HandleReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred) |
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{ |
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if (!ecode) |
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{ |
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m_Buffer[bytes_transferred] = 0; |
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std::pair<std::string,std::string> requestInfo = ExtractRequest (); |
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request m_Request; |
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parseHeaders (m_Buffer, m_Request.headers); |
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LogPrint("Requesting ", requestInfo.first, " with path ", requestInfo.second); |
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HandleDestinationRequest (requestInfo.first, requestInfo.second); |
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boost::asio::async_write (*m_Socket, m_Reply.to_buffers(), |
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boost::bind (&HTTPConnection::HandleWrite, this, |
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boost::asio::placeholders::error)); |
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//Receive ();
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} |
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else if (ecode != boost::asio::error::operation_aborted) |
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Terminate (); |
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} |
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void HTTPConnection::parseHeaders(const std::string& h, std::vector<header>& hm) { |
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std::string str (h); |
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std::string::size_type idx; |
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std::string t; |
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int i = 0; |
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while( (idx=str.find ("\r\n")) != std::string::npos) { |
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t=str.substr (0,idx); |
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str.erase (0,idx+2); |
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if (t == "") |
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break; |
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idx=t.find(": "); |
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if (idx == std::string::npos) |
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{ |
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std::cout << "Bad header line: " << t << std::endl; |
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break; |
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} |
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LogPrint ("Name: ", t.substr (0,idx), " Value: ", t.substr (idx+2)); |
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hm[i].name = t.substr (0,idx); |
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hm[i].value = t.substr (idx+2); |
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i++; |
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} |
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} |
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// TODO: Support other requests than GET.
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std::pair<std::string, std::string> HTTPConnection::ExtractRequest () |
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{ |
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char * get = strstr (m_Buffer, "GET"); |
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if (get) |
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{ |
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char * http = strstr (get, "HTTP"); |
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if (http) |
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{ |
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std::string url (get + 4, http - get - 5); |
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size_t sp = url.find_first_of ('/', 7 /* skip http:// part */ ); |
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if (sp != std::string::npos) |
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{ |
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std::string base_url (url.begin()+7, url.begin()+sp); |
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LogPrint ("Base URL is: ", base_url, "\n"); |
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if ( sp != std::string::npos ) |
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{ |
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std::string query (url.begin ()+sp+1, url.end ()); |
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LogPrint ("Query is: ", "/" + query); |
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return std::make_pair (base_url, "/" + query); |
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} |
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return std::make_pair (base_url, "/"); |
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} |
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} |
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} |
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return std::make_pair ("",""); |
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} |
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void HTTPConnection::HandleWrite (const boost::system::error_code& ecode) |
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{ |
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Terminate (); |
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} |
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void HTTPConnection::HandleDestinationRequest (const std::string& address, const std::string& uri) |
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{ |
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i2p::data::IdentHash destination; |
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std::string fullAddress; |
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if (address.find (".b32.i2p") != std::string::npos) |
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{ |
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int li = address.find_first_of ("."); |
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std::string newaddress = address.substr (0, li); |
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if (i2p::data::Base32ToByteStream (newaddress.c_str (), newaddress.length (), (uint8_t *)destination, 32) != 32) |
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{ |
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LogPrint ("Invalid Base32 address ", newaddress); |
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return; |
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} |
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fullAddress = newaddress + ".b32.i2p"; |
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} |
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else |
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{ |
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auto addr = i2p::data::netdb.FindAddress (address); |
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if (!addr) |
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{ |
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LogPrint ("Unknown address ", address); |
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return; |
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} |
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destination = *addr; |
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fullAddress = address; |
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} |
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auto leaseSet = i2p::data::netdb.FindLeaseSet (destination); |
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if (!leaseSet || !leaseSet->HasNonExpiredLeases ()) |
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{ |
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i2p::data::netdb.Subscribe(destination); |
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std::this_thread::sleep_for (std::chrono::seconds(10)); // wait for 10 seconds
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leaseSet = i2p::data::netdb.FindLeaseSet (destination); |
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if (!leaseSet || !leaseSet->HasNonExpiredLeases ()) // still no LeaseSet
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{ |
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m_Reply.content = leaseSet ? "<html>"+ i2p::proxy::itoopieImage +"<br>Leases expired</html>" : "<html>"+ i2p::proxy::itoopieImage +"LeaseSet not found</html>"; |
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m_Reply.headers.resize(2); |
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m_Reply.headers[0].name = "Content-Length"; |
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m_Reply.headers[0].value = boost::lexical_cast<std::string>(m_Reply.content.size()); |
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m_Reply.headers[1].name = "Content-Type"; |
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m_Reply.headers[1].value = "text/html"; |
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return; |
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} |
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} |
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auto s = i2p::stream::CreateStream (*leaseSet); |
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if (s) |
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{ |
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std::string request = "GET " + uri + " HTTP/1.1\n Host:" + fullAddress + "\n"; |
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s->Send ((uint8_t *)request.c_str (), request.length (), 10); |
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std::stringstream ss; |
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uint8_t buf[8192]; |
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size_t r = s->Receive (buf, 8192, 30); // 30 seconds
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if (!r && s->IsEstablished ()) // nothing received but connection is established
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r = s->Receive (buf, 8192, 30); // wait for another 30 secondd
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if (r) // we recieved data
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{ |
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ss << std::string ((char *)buf, r); |
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while (s->IsOpen () && (r = s->Receive (buf, 8192, 30)) > 0) |
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ss << std::string ((char *)buf,r); |
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m_Reply.content = ss.str (); // send "as is"
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m_Reply.headers.resize(0); // no headers
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return; |
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} |
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else // nothing received
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ss << "<html>"+ i2p::proxy::itoopieImage +"<br>Not responding</html>"; |
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s->Close (); |
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DeleteStream (s); |
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m_Reply.content = ss.str (); |
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m_Reply.headers.resize(2); |
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m_Reply.headers[0].name = "Content-Length"; |
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m_Reply.headers[0].value = boost::lexical_cast<std::string>(m_Reply.content.size()); |
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m_Reply.headers[1].name = "Content-Type"; |
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m_Reply.headers[1].value = "text/html"; |
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} |
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} |
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HTTPProxy::HTTPProxy (int port): |
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m_Thread (nullptr), m_Work (m_Service), |
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m_Acceptor (m_Service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)), |
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m_NewSocket (nullptr) |
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{ |
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} |
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HTTPProxy::~HTTPProxy () |
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{ |
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Stop (); |
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} |
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void HTTPProxy::Start () |
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{ |
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m_Thread = new std::thread (std::bind (&HTTPProxy::Run, this)); |
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m_Acceptor.listen (); |
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Accept (); |
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} |
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void HTTPProxy::Stop () |
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{ |
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m_Acceptor.close(); |
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m_Service.stop (); |
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if (m_Thread) |
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{ |
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m_Thread->join (); |
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delete m_Thread; |
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m_Thread = nullptr; |
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} |
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} |
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void HTTPProxy::Run () |
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{ |
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m_Service.run (); |
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} |
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void HTTPProxy::Accept () |
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{ |
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m_NewSocket = new boost::asio::ip::tcp::socket (m_Service); |
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m_Acceptor.async_accept (*m_NewSocket, boost::bind (&HTTPProxy::HandleAccept, this, |
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boost::asio::placeholders::error)); |
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} |
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void HTTPProxy::HandleAccept(const boost::system::error_code& ecode) |
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{ |
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if (!ecode) |
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{ |
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new HTTPConnection (m_NewSocket); |
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Accept (); |
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} |
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} |
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} |
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} |
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