httppars.cpp
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上传日期:2007-06-06
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文件大小:14k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- //#include "hlxclib/stdlib.h"
- #include "hxcom.h"
- #include "hxtypes.h"
- #include "hxassert.h"
- #include "debug.h"
- #include "hxstrutl.h"
- #include "hxstring.h"
- #include "chxpckts.h"
- #include "hxauth.h"
- #include "httppars.h"
- #include "httpmsg.h"
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- HTTPParser::HTTPParser()
- {
- }
- HTTPParser::~HTTPParser()
- {
- clearMessageLines();
- }
- /*
- * Extract major/minor version info
- */
- int
- HTTPParser::parseProtocolVersion(const CHXString& prot,
- int& majorVersion, int& minorVersion)
- {
- if(strncasecmp(prot, "HTTP/", 5) != 0)
- return 0;
- int nVerOffset = prot.Find('.');
- if(nVerOffset > 5)
- {
- CHXString majVersion = prot.Mid(5, nVerOffset-5);
- majorVersion = (int)strtol(majVersion, 0, 10);
- CHXString minVersion = prot.Mid(nVerOffset+1);
- minorVersion = (int)strtol(minVersion, 0, 10);
- return 1;
- }
- return 0;
- }
- /*
- * Parse option in form 'name[=value] *[;name[=value]]'
- */
- int
- HTTPParser::parseHeaderValue(const char* pValue, MIMEHeader* pHeader)
- {
- if(strlen(pValue) == 0)
- return 0;
- MIMEInputStream input(pValue, strlen(pValue));
- MIMEScanner scanner(input);
- MIMEHeaderValue* pHeaderValue = 0;
- MIMEToken tok = scanner.nextToken(";");
- while(tok.hasValue())
- {
- if(!pHeaderValue)
- {
- CHXString attribute = tok.value();
- pHeaderValue = new MIMEHeaderValue;
- if(tok.lastChar() == '=')
- {
- tok = scanner.nextToken(";");
- CHXString value = tok.value();
- pHeaderValue->addParameter(attribute, value);
- }
- else
- {
- pHeaderValue->addParameter(attribute);
- }
- }
- else if(tok.lastChar() == '=')
- {
- CHXString attribute = tok.value();
- tok = scanner.nextToken(";");
- CHXString value = tok.value();
- pHeaderValue->addParameter(attribute, value);
- }
- else
- {
- CHXString attribute = tok.value();
- pHeaderValue->addParameter(attribute, "");
- }
- tok = scanner.nextToken("=;");
- }
- if(pHeaderValue)
- pHeader->addHeaderValue(pHeaderValue);
- return 0;
- }
- int
- HTTPParser::parseWWWAuthenticateHeaderValues(const char* pValue,
- MIMEHeader* pHeader)
- {
- MIMEInputStream input(pValue, strlen(pValue));
- MIMEScanner scanner(input);
- IHXValues* authValues;
- /*
- char* pNonce = 0;
- char* pRealm = 0;
- char* pOpaque= 0;
- */
- MIMEToken nextTok = scanner.nextToken(" ");
- if(strcasecmp(nextTok.value(), "Digest") == 0)
- {
- authValues = new CHXHeader;
- authValues->AddRef();
- authValues->SetPropertyULONG32("AuthType", HX_AUTH_DIGEST);
- while(nextTok.hasValue())
- {
- nextTok = scanner.nextToken("=,");
- if(strcasecmp(nextTok.value(), "nonce") == 0)
- {
- nextTok = scanner.nextToken("=,");
- CHXBuffer* pBuf = new CHXBuffer;
- pBuf->AddRef();
- pBuf->Set((const BYTE*)(const char*)nextTok.value(),
- nextTok.value().GetLength()+1);
- authValues->SetPropertyCString("Nonce", pBuf);
- pBuf->Release();
- }
- else if(strcasecmp(nextTok.value(), "realm") == 0)
- {
- nextTok = scanner.nextToken("=,");
- CHXBuffer* pBuf = new CHXBuffer;
- pBuf->AddRef();
- pBuf->Set((const BYTE*)(const char*)nextTok.value(),
- nextTok.value().GetLength()+1);
- authValues->SetPropertyCString("Realm", pBuf);
- pBuf->Release();
- }
- else if(strcasecmp(nextTok.value(), "opaque") == 0)
- {
- nextTok = scanner.nextToken("=,");
- CHXBuffer* pBuf = new CHXBuffer;
- pBuf->AddRef();
- pBuf->Set((const BYTE*)(const char*)nextTok.value(),
- nextTok.value().GetLength()+1);
- authValues->SetPropertyCString("Opaque", pBuf);
- pBuf->Release();
- }
- }
- pHeader->addHeaderValue
- (new HTTPAuthentication(authValues));
- authValues->Release();
- }
- else if(strcasecmp(nextTok.value(), "Basic") == 0)
- {
- authValues = new CHXHeader();
- authValues->AddRef();
- authValues->SetPropertyULONG32("AuthType", HX_AUTH_BASIC);
- while(nextTok.hasValue())
- {
- nextTok = scanner.nextToken("=,");
- if(strcasecmp(nextTok.value(), "realm") == 0)
- {
- nextTok = scanner.nextToken("=,");
- char * realmstr = new char[strlen(nextTok.value()) + 1];
- char* valstart, *valend;
- valstart = (char*)strchr(nextTok.value(), '"');
- valend = (char*)strrchr(nextTok.value(), '"');
- if(valstart && valend && valstart != valend)
- {
- valstart++;
- memcpy(realmstr, valstart, valend - valstart);
- realmstr[valend - valstart] = 0;
- }
- else
- {
- strcpy(realmstr, nextTok.value());
- }
- CHXBuffer* pBuf = new CHXBuffer;
- pBuf->AddRef();
- pBuf->Set((const BYTE*)realmstr, strlen(realmstr)+1);
- authValues->SetPropertyCString("Realm", pBuf);
- pBuf->Release();
- delete [] realmstr;
- }
- }
- pHeader->addHeaderValue(new HTTPAuthentication(authValues));
- authValues->Release();
- }
- else
- {
- // Just add un-parsed value
- pHeader->addHeaderValue(pValue);
- }
- return 0;
- }
- /*
- * Parse header values as list of comma separated values
- */
- int
- HTTPParser::defaultParseHeaderValues(const char* pValue, MIMEHeader* pHeader)
- {
- MIMEInputStream input(pValue, strlen(pValue));
- MIMEScanner scanner(input);
-
- MIMEToken nextTok = scanner.nextToken(",");
- while(nextTok.hasValue())
- {
- parseHeaderValue(nextTok.value(), pHeader);
- if((nextTok.lastChar() == MIMEToken::T_EOL) ||
- (nextTok.lastChar() == MIMEToken::T_EOF))
- return 0;
- nextTok = scanner.nextToken(",");
- }
- return 0;
- }
- /*
- * construct an MIMEHeader and add header values to it
- * format: 'HeaderName: option, option=value, option'
- */
- MIMEHeader*
- HTTPParser::parseHeader(CHXString& str)
- {
- MIMEHeader* pHeader = 0;
- MIMEInputStream input(str);
- MIMEScanner scanner(input);
- MIMEToken nextTok = scanner.nextToken(":");
- if(nextTok.hasValue())
- {
- pHeader = new MIMEHeader(nextTok.value());
- nextTok = scanner.nextToken("n");
- if(strcasecmp(pHeader->name(), "WWW-Authenticate") == 0)
- {
- parseWWWAuthenticateHeaderValues(nextTok.value(), pHeader);
- }
- else
- {
- defaultParseHeaderValues(nextTok.value(), pHeader);
- }
- }
- return pHeader;
- }
- /*
- * Parse request line in format 'METHOD URL VERSION SEQ_NO'
- */
- HTTPRequestMessage*
- HTTPParser::parseRequestLine(CHXString& str)
- {
- int majorVersion, minorVersion;
- HTTPRequestMessage* pReqMsg = 0;
- MIMEInputStream input(str);
- MIMEScanner scanner(input);
- // build message
- MIMEToken nextTok = scanner.nextToken();
- if(strcasecmp(nextTok.value(), "GET") == 0)
- {
- pReqMsg = new HTTPGetMessage;
- }
- else if(strcasecmp(nextTok.value(), "HEAD") == 0)
- {
- pReqMsg = new HTTPHeadMessage;
- }
- else if(strcasecmp(nextTok.value(), "POST") == 0)
- {
- pReqMsg = new HTTPPostMessage;
- }
- else
- {
- pReqMsg = new HTTPUnknownMessage;
- }
- // get URL
- nextTok = scanner.nextToken("t n");
- pReqMsg->setURL(nextTok.value());
- // get version info
- nextTok = scanner.nextToken();
- if(parseProtocolVersion(nextTok.value(), majorVersion, minorVersion))
- {
- pReqMsg->setVersion(majorVersion, minorVersion);
- }
- else
- {
- pReqMsg->setVersion(0,0);
- }
- return pReqMsg;
- }
- /*
- * Parse response line in format 'VERSION ERR_CODE SEQ_NO ERR_MSG'
- */
- HTTPResponseMessage*
- HTTPParser::parseResponseLine(CHXString& str)
- {
- int majorVersion, minorVersion;
- HTTPResponseMessage* pRespMsg = 0;
- MIMEInputStream input(str);
- MIMEScanner scanner(input);
- MIMEToken nextTok = scanner.nextToken();
- pRespMsg = new HTTPResponseMessage;
- if(parseProtocolVersion(nextTok.value(),
- majorVersion, minorVersion))
- {
- pRespMsg->setVersion(majorVersion, minorVersion);
- }
- else
- {
- pRespMsg->setVersion(0,0);
- }
- // get error code
- nextTok = scanner.nextToken();
- pRespMsg->setErrorCode(nextTok.value());
- // get error message
- nextTok = scanner.nextToken("n"); // go to EOL
- pRespMsg->setErrorMsg(nextTok.value());
- return pRespMsg;
- }
- /*
- * Parse response message
- */
- HTTPMessage*
- HTTPParser::parseResponse()
- {
- HTTPResponseMessage* pRespMsg = 0;
-
- LISTPOSITION pos = m_msglines.GetHeadPosition();
- CHXString* pStr = (CHXString*)m_msglines.GetNext(pos);
- pRespMsg = parseResponseLine(*pStr);
- if(!pRespMsg)
- return 0;
- while(pos)
- {
- pStr = (CHXString*)m_msglines.GetNext(pos);
- MIMEHeader* pHeader = parseHeader(*pStr);
- if(pHeader)
- pRespMsg->addHeader(pHeader);
- }
- return pRespMsg;
- }
- /*
- * Parse request message
- */
- HTTPMessage*
- HTTPParser::parseRequest()
- {
- HTTPRequestMessage* pReqMsg = 0;
-
- LISTPOSITION pos = m_msglines.GetHeadPosition();
- CHXString* pStr = (CHXString*)m_msglines.GetNext(pos);
- pReqMsg = parseRequestLine(*pStr);
- if(!pReqMsg)
- return 0;
- if(pReqMsg->majorVersion() < 0)
- return pReqMsg;
- while(pos)
- {
- pStr = (CHXString*)m_msglines.GetNext(pos);
- MIMEHeader* pHeader = parseHeader(*pStr);
- if(pHeader)
- pReqMsg->addHeader(pHeader);
- }
- return pReqMsg;
- }
- /*
- * Add each line in message to list m_msglines.
- * Look for two carriage returns to delimit
- * message header.
- */
- int
- HTTPParser::scanMessageHeader(const char* pMsg, UINT32 nMsgLen)
- {
- // first, get rid of any leading whitespace and <CR><LF> chars
- const char* pCh = pMsg;
- while(*pCh == 'n' || *pCh == 'r' || *pCh == ' ' || *pCh == 't')
- {
- pCh++;
- }
- UINT32 offset = pCh - pMsg;
- if(offset > nMsgLen)
- {
- return 0;
- }
- MIMEInputStream input(pMsg, nMsgLen - offset);
- MIMEScanner scanner(input);
- MIMEToken tok;
- int gotEOL = 0;
- UINT32 scanOffset = 0;
- do
- {
- tok = scanner.nextToken("n");
- m_msglines.AddTail((void*)(new CHXString((const char*)tok.value())));
- if(tok.lastChar() == MIMEToken::T_EOL)
- {
- if(gotEOL && !tok.hasValue())
- {
- scanOffset = scanner.offset();
- break;
- }
- else
- {
- gotEOL = 1;
- }
- }
- else
- {
- gotEOL = 0;
- }
- } while(tok.lastChar() != MIMEToken::T_EOF);
- if(scanOffset == 0)
- {
- return 0;
- }
- else
- {
- return HX_SAFEINT(scanOffset + offset);
- }
- }
- /*
- * Parse message pointed to by pMsg with length nMsgLen.
- * If not a complete message, return 0, otherwise return
- * HTTPMessage pointer.
- */
- HTTPMessage*
- HTTPParser::parse(const char* pMsg, UINT32& nMsgLen)
- {
- HTTPMessage* pHTTPMsg = 0;
- clearMessageLines();
- int msgOffset = scanMessageHeader(pMsg, nMsgLen);
- if(msgOffset > 0)
- {
- if(m_msglines.GetCount() == 0)
- {
- nMsgLen = 0;
- return 0;
- }
- CHXString* str = (CHXString*)m_msglines.GetHead();
- if(strncasecmp((*str), "HTTP/", 5) == 0)
- {
- pHTTPMsg = parseResponse();
- }
- else
- {
- pHTTPMsg = parseRequest();
- }
- if(pHTTPMsg)
- {
- nMsgLen = msgOffset;
- }
- }
- else
- {
- //nMsgLen = 0;
- /* Might be a HTTP/0.9 request. No extra blank line. Drat. */
- if(m_msglines.GetCount() == 0)
- {
- nMsgLen = 0;
- return 0;
- }
- CHXString* str = (CHXString*)m_msglines.GetHead();
- pHTTPMsg = parseRequest();
- if(!pHTTPMsg || pHTTPMsg->majorVersion() > 0)
- {
- nMsgLen = 0;
- delete pHTTPMsg;
- pHTTPMsg = 0;
- }
- }
- return pHTTPMsg;
- }
- /*
- * Delete contents of m_msglines
- */
- void
- HTTPParser::clearMessageLines()
- {
- LISTPOSITION pos = m_msglines.GetHeadPosition();
- while(pos)
- {
- CHXString* str = (CHXString*)m_msglines.GetNext(pos);
- delete str;
- }
- m_msglines.RemoveAll();
- }