mirror of
https://github.com/Xahau/xahaud.git
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296 lines
9.4 KiB
C++
296 lines
9.4 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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// Used for logging
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struct RPCLog;
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SETUP_LOGN (RPCLog, "RPC")
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unsigned int const gMaxHTTPHeaderSize = 0x02000000;
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std::string gFormatStr ("v1");
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// VFALCO TODO clean up this nonsense
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std::string FormatFullVersion ()
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{
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return (gFormatStr);
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}
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Json::Value JSONRPCError (int code, const std::string& message)
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{
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Json::Value error (Json::objectValue);
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error["code"] = Json::Value (code);
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error["message"] = Json::Value (message);
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return error;
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}
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//
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// HTTP protocol
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//
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// This ain't Apache. We're just using HTTP header for the length field
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// and to be compatible with other JSON-RPC implementations.
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//
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std::string createHTTPPost (const std::string& strHost, const std::string& strPath, const std::string& strMsg, const std::map<std::string, std::string>& mapRequestHeaders)
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{
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std::ostringstream s;
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s << "POST "
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<< (strPath.empty () ? "/" : strPath)
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<< " HTTP/1.0\r\n"
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<< "User-Agent: " SYSTEM_NAME "-json-rpc/" << FormatFullVersion () << "\r\n"
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<< "Host: " << strHost << "\r\n"
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<< "Content-Type: application/json\r\n"
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<< "Content-Length: " << strMsg.size () << "\r\n"
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<< "Accept: application/json\r\n";
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typedef std::map<std::string, std::string>::value_type HeaderType;
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BOOST_FOREACH (const HeaderType & item, mapRequestHeaders)
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s << item.first << ": " << item.second << "\r\n";
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s << "\r\n" << strMsg;
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return s.str ();
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}
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std::string rfc1123Time ()
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{
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char buffer[64];
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time_t now;
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time (&now);
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struct tm* now_gmt = gmtime (&now);
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std::string locale (setlocale (LC_TIME, NULL));
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setlocale (LC_TIME, "C"); // we want posix (aka "C") weekday/month strings
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strftime (buffer, sizeof (buffer), "%a, %d %b %Y %H:%M:%S +0000", now_gmt);
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setlocale (LC_TIME, locale.c_str ());
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return std::string (buffer);
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}
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std::string HTTPReply (int nStatus, const std::string& strMsg)
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{
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WriteLog (lsTRACE, RPCLog) << "HTTP Reply " << nStatus << " " << strMsg;
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if (nStatus == 401)
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return strprintf ("HTTP/1.0 401 Authorization Required\r\n"
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"Date: %s\r\n"
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"Server: " SYSTEM_NAME "-json-rpc/%s\r\n"
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"WWW-Authenticate: Basic realm=\"jsonrpc\"\r\n"
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"Content-Type: text/html\r\n"
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"Content-Length: 296\r\n"
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"\r\n"
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"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"\r\n"
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"\"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd\">\r\n"
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"<HTML>\r\n"
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"<HEAD>\r\n"
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"<TITLE>Error</TITLE>\r\n"
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"<META HTTP-EQUIV='Content-Type' CONTENT='text/html; charset=ISO-8859-1'>\r\n"
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"</HEAD>\r\n"
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"<BODY><H1>401 Unauthorized.</H1></BODY>\r\n"
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"</HTML>\r\n", rfc1123Time ().c_str (), FormatFullVersion ().c_str ());
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std::string strStatus;
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if (nStatus == 200) strStatus = "OK";
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else if (nStatus == 400) strStatus = "Bad Request";
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else if (nStatus == 403) strStatus = "Forbidden";
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else if (nStatus == 404) strStatus = "Not Found";
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else if (nStatus == 500) strStatus = "Internal Server Error";
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std::string access;
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if (getConfig ().RPC_ALLOW_REMOTE) access = "Access-Control-Allow-Origin: *\r\n";
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else access = "";
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return strprintf (
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"HTTP/1.1 %d %s\r\n"
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"Date: %s\r\n"
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"Connection: Keep-Alive\r\n"
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"%s"
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"Content-Length: %d\r\n"
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"Content-Type: application/json; charset=UTF-8\r\n"
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"Server: " SYSTEM_NAME "-json-rpc/%s\r\n"
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"\r\n"
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"%s\r\n",
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nStatus,
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strStatus.c_str (),
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rfc1123Time ().c_str (),
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access.c_str (),
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strMsg.size () + 2,
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//SERVER_VERSION,
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BuildInfo::getFullVersionString (),
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strMsg.c_str ());
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}
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int ReadHTTPStatus (std::basic_istream<char>& stream)
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{
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std::string str;
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getline (stream, str);
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std::vector<std::string> vWords;
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boost::split (vWords, str, boost::is_any_of (" "));
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if (vWords.size () < 2)
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return 500;
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return atoi (vWords[1].c_str ());
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}
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int ReadHTTPHeader (std::basic_istream<char>& stream, std::map<std::string, std::string>& mapHeadersRet)
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{
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int nLen = 0;
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for (;;)
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{
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std::string str;
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std::getline (stream, str);
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if (str.empty () || str == "\r")
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break;
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std::string::size_type nColon = str.find (":");
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if (nColon != std::string::npos)
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{
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std::string strHeader = str.substr (0, nColon);
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boost::trim (strHeader);
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boost::to_lower (strHeader);
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std::string strValue = str.substr (nColon + 1);
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boost::trim (strValue);
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mapHeadersRet[strHeader] = strValue;
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if (strHeader == "content-length")
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nLen = atoi (strValue.c_str ());
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}
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}
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return nLen;
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}
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int ReadHTTP (std::basic_istream<char>& stream, std::map<std::string, std::string>& mapHeadersRet,
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std::string& strMessageRet)
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{
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mapHeadersRet.clear ();
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strMessageRet = "";
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// Read status
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int nStatus = ReadHTTPStatus (stream);
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// Read header
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int nLen = ReadHTTPHeader (stream, mapHeadersRet);
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if (nLen < 0 || nLen > gMaxHTTPHeaderSize)
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return 500;
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// Read message
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if (nLen > 0)
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{
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std::vector<char> vch (nLen);
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stream.read (&vch[0], nLen);
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strMessageRet = std::string (vch.begin (), vch.end ());
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}
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return nStatus;
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}
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std::string DecodeBase64 (std::string s)
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{
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// FIXME: This performs badly
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BIO* b64, *bmem;
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char* buffer = static_cast<char*> (calloc (s.size (), sizeof (char)));
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b64 = BIO_new (BIO_f_base64 ());
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BIO_set_flags (b64, BIO_FLAGS_BASE64_NO_NL);
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bmem = BIO_new_mem_buf (const_cast<char*> (s.data ()), s.size ());
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bmem = BIO_push (b64, bmem);
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BIO_read (bmem, buffer, s.size ());
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BIO_free_all (bmem);
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std::string result (buffer);
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free (buffer);
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return result;
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}
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bool HTTPAuthorized (const std::map<std::string, std::string>& mapHeaders)
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{
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std::map<std::string, std::string>::const_iterator it = mapHeaders.find ("authorization");
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if ((it == mapHeaders.end ()) || (it->second.substr (0, 6) != "Basic "))
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return getConfig ().RPC_USER.empty () && getConfig ().RPC_PASSWORD.empty ();
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std::string strUserPass64 = it->second.substr (6);
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boost::trim (strUserPass64);
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std::string strUserPass = DecodeBase64 (strUserPass64);
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std::string::size_type nColon = strUserPass.find (":");
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if (nColon == std::string::npos)
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return false;
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std::string strUser = strUserPass.substr (0, nColon);
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std::string strPassword = strUserPass.substr (nColon + 1);
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return (strUser == getConfig ().RPC_USER) && (strPassword == getConfig ().RPC_PASSWORD);
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}
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//
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// JSON-RPC protocol. Bitcoin speaks version 1.0 for maximum compatibility,
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// but uses JSON-RPC 1.1/2.0 standards for parts of the 1.0 standard that were
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// unspecified (HTTP errors and contents of 'error').
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//
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// 1.0 spec: http://json-rpc.org/wiki/specification
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// 1.2 spec: http://groups.google.com/group/json-rpc/web/json-rpc-over-http
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//
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std::string JSONRPCRequest (const std::string& strMethod, const Json::Value& params, const Json::Value& id)
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{
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Json::Value request;
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request["method"] = strMethod;
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request["params"] = params;
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request["id"] = id;
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Json::FastWriter writer;
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return writer.write (request) + "\n";
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}
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std::string JSONRPCReply (const Json::Value& result, const Json::Value& error, const Json::Value& id)
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{
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Json::Value reply (Json::objectValue);
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reply["result"] = result;
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//reply["error"]=error;
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//reply["id"]=id;
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Json::FastWriter writer;
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return writer.write (reply) + "\n";
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}
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void ErrorReply (std::ostream& stream, const Json::Value& objError, const Json::Value& id)
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{
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// Send error reply from json-rpc error object
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int nStatus = 500;
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int code = objError["code"].asInt ();
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if (code == -32600) nStatus = 400;
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else if (code == -32601) nStatus = 404;
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std::string strReply = JSONRPCReply (Json::Value (), objError, id);
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stream << HTTPReply (nStatus, strReply) << std::flush;
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}
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// vim:ts=4
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