+++ /dev/null
-/*
- * COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS HTTP Daemon
- * FILE: http.cpp
- * PURPOSE: HTTP 1.1 parser engine
- * PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
- * REVISIONS:
- * CSH 01/09/2000 Created
- * TODO: - Implement message-body
- * - Implement more generel-header entries
- * - Implement more request-header entries
- * - Implement more entity-header entries
- */
-#include <debug.h>
-#include <iostream.h>
-#include <string.h>
-#include <http.h>
-
-CHAR MethodTable[NUMMETHODS][8] = {"OPTIONS", "GET", "HEAD", "POST", "PUT",
- "DELETE", "TRACE"};
-
-CHAR GenerelTable[NUMGENERELS][18] = {"Cache-Control", "Connection", "Date", "Pragma",
- "Transfer-Encoding", "Upgrade", "Via"};
-
-CHAR RequestTable[NUMREQUESTS][20] = {"Accept", "Accept-Charset", "Accept-Encoding",
- "Accept-Language", "Authorization", "From", "Host", "If-Modified-Since", "If-Match",
- "If-None-Match", "If-Range", "If-Unmodified-Since", "Max-Forwards",
- "Proxy-Authorization", "Range", "Referer", "User-Agent"};
-
-CHAR EntityTable[NUMENTITIES][17] = {"Allow", "Content-Base", "Content-Encoding",
- "Content-Language", "Content-Length", "Content-Location", "Content-MD5",
- "Content-Range", "Content-Type", "ETag", "Expires", "Last-Modified"};
-
-// *************************** CHttpParser ***************************
-
-// Default constructor
-CHttpParser::CHttpParser()
-{
- nHead = 0;
- nTail = 0;
-}
-
-// Default destructor
-CHttpParser::~CHttpParser()
-{
-}
-
-// Returns TRUE if a complete HTTP message is in buffer
-BOOL CHttpParser::Complete()
-{
- UINT nTmp;
-
- /*DPRINT("--1:-%d---\n", sBuffer[nHead-2]);
- DPRINT("--2:-%d---\n", sBuffer[nHead-1]);
-
- sBuffer[nHead] = '!';
- sBuffer[nHead+1] = 0;
- DPRINT("Examining buffer: (Head: %d, Tail: %d)\n", nHead, nTail);
- DPRINT("%s\n", (LPSTR)&sBuffer[nTail]);*/
-
- nTmp = nTail;
- if (!Parse()) {
- if (!bUnknownMethod)
- nTail = nTmp;
- return FALSE;
- } else
- return TRUE;
-}
-
-
-// Read a character from buffer
-BOOL CHttpParser::ReadChar(LPSTR lpsStr)
-{
- if (nTail <= nHead) {
- if (nTail != nHead) {
- lpsStr[0] = sBuffer[nTail];
- nTail++;
- return TRUE;
- } else {
- lpsStr[0] = 0;
- return FALSE;
- }
- } else {
- if (nTail == sizeof(sBuffer))
- nTail = 0;
- if (nTail != nHead) {
- lpsStr[0] = sBuffer[nTail];
- nTail++;
- return TRUE;
- } else {
- lpsStr[0] = 0;
- return FALSE;
- }
- }
-}
-
-// Peek at a character in the buffer
-BOOL CHttpParser::PeekChar(LPSTR lpsStr)
-{
- UINT nFakeTail;
-
- if (nTail == sizeof(sBuffer))
- nFakeTail = 0;
- else
- nFakeTail = nTail;
- if (nFakeTail != nHead) {
- lpsStr[0] = sBuffer[nFakeTail];
- return TRUE;
- } else {
- lpsStr[0] = 0;
- return FALSE;
- }
-}
-
-// Read a string from buffer. Only A-Z, a-z, 0-9 and '-' are valid characters
-BOOL CHttpParser::ReadString(LPSTR lpsStr, UINT nLength)
-{
- UINT i = 0;
- CHAR sTmp;
-
- while (PeekChar(&sTmp)) {
- if (((sTmp >= 'A') && (sTmp <= 'Z')) || ((sTmp >= 'a') && (sTmp <= 'z')) ||
- ((sTmp >= '0') && (sTmp <= '9')) || (sTmp == '-')) {
- if (i >= (nLength - 1)) {
- lpsStr[0] = 0;
- return FALSE;
- }
- ReadChar(&sTmp);
- lpsStr[i] = sTmp;
- i++;
- } else {
- lpsStr[i] = 0;
- return TRUE;
- }
- }
- lpsStr[0] = 0;
- return FALSE;
-}
-
-// Read a string from buffer. Stop if SP or CR is found or when there are no more
-// characters
-BOOL CHttpParser::ReadSpecial(LPSTR lpsStr, UINT nLength)
-{
- UINT i = 0;
- CHAR sTmp;
-
- while (PeekChar(&sTmp) && (sTmp != ' ') && (sTmp != 13)) {
- if (i >= (nLength - 1)) {
- lpsStr[nLength - 1] = 0;
- return FALSE;
- }
- ReadChar(&sTmp);
- lpsStr[i] = sTmp;
- i++;
- }
- lpsStr[i] = 0;
- return TRUE;
-}
-
-// Skip until "sCh" is found
-VOID CHttpParser::Skip(CHAR sCh)
-{
- CHAR sTmp;
-
- while (PeekChar(&sTmp) && (sTmp != sCh))
- ReadChar(&sTmp);
-}
-
-// Return TRUE if sCh is the next character
-BOOL CHttpParser::Expect(CHAR sCh)
-{
- CHAR sTmp;
-
- if (PeekChar(&sTmp)) {
- if (sTmp == sCh) {
- ReadChar(&sTmp);
- return TRUE;
- }
- }
- return FALSE;
-}
-
-// Return TRUE if CRLF are the next characters
-BOOL CHttpParser::ExpectCRLF()
-{
- return (Expect(13) && Expect(10));
-}
-
-// Request = RequestLine | *( GenerelHeader | RequestHeader | EntityHeader )
-// CRLF [ MessageBody ]
-BOOL CHttpParser::Parse()
-{
- BOOL bStatus;
-
-
- CHAR ch;
-
- if (RequestLine()) {
- do {
- if (!ReadString(sHeader, sizeof(sHeader)))
- break;
- bStatus = (GenerelHeader());
- bStatus = (RequestHeader() || bStatus);
- bStatus = (EntityHeader() || bStatus);
- } while (bStatus);
- // CRLF
- if (!ExpectCRLF())
- return FALSE;
- MessageBody();
- return TRUE;
- }
- return FALSE;
-}
-
-// RequestLine = Method SP RequestURI SP HTTP-Version CRLF
-BOOL CHttpParser::RequestLine()
-{
- CHAR sCh;
- UINT i;
-
- bUnknownMethod = FALSE;
-
- // RFC 2068 states that servers SHOULD ignore any empty nine(s) received where a
- // Request-Line is expected
- while (PeekChar(&sCh) && ((sCh == 13) || (sCh == 10)));
-
- if (!ReadString(sMethod, sizeof(sMethod)))
- return FALSE;
-
- for (i = 0; i < NUMMETHODS; i++) {
- if (strcmp(MethodTable[i], sMethod) == 0) {
- nMethodNo = i;
- if (!Expect(' '))
- return FALSE;
- // URI (ie. host/directory/resource)
- if (!ReadSpecial(sUri, sizeof(sUri)))
- return FALSE;
- if (!Expect(' '))
- return FALSE;
- // HTTP version (eg. HTTP/1.1)
- if (!ReadSpecial(sVersion, sizeof(sVersion)))
- return FALSE;
- // CRLF
- if (!ExpectCRLF())
- return FALSE;
-
- return TRUE;
- }
- }
- bUnknownMethod = TRUE;
- return FALSE;
-}
-
-// GenerelHeader = Cache-Control | Connection | Date | Pragma | Transfer-Encoding |
-// Upgrade | Via
-BOOL CHttpParser::GenerelHeader()
-{
- INT i;
-
- for (i = 0; i < NUMGENERELS; i++) {
- if (strcmp(GenerelTable[i], sHeader) == 0) {
- switch (i) {
- case 1: {
- //Connection
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- break;
- }
- default: {
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- }
- }
- return TRUE;
- }
- }
- return FALSE;
-}
-
-// RequestHeader = Accept | Accept-Charset | Accept-Encoding | Accept-Language |
-// Authorization | From | Host | If-Modified-Since | If-Match |
-// If-None-Match | If-Range | If-Unmodified-Since | Max-Forwards |
-// Proxy-Authorization | Range | Referer | User-Agent
-BOOL CHttpParser::RequestHeader()
-{
- INT i;
-
- for (i = 0; i < NUMREQUESTS; i++) {
- if (strcmp(RequestTable[i], sHeader) == 0) {
- switch (i) {
- case 0: {
- //Accept
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- break;
- }
- case 2: {
- //Accept-Encoding
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- break;
- }
- case 3: {
- //Accept-Language
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- break;
- }
- case 6: {
- //Host
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- break;
- }
- case 16: {
- //User-Agent
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- break;
- }
- default: {
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- return TRUE;
- }
- }
- return TRUE;
- }
- }
- return FALSE;
-}
-
-// EntityHeader = Allow | Content-Base | Content-Encoding | Content-Language |
-// Content-Length | Content-Location | Content-MD5 |
-// Content-Range | Content-Type | ETag | Expires |
-// Last-Modified | extension-header
-BOOL CHttpParser::EntityHeader()
-{
- INT i;
-
- for (i = 0; i < NUMENTITIES; i++) {
- if (strcmp(EntityTable[i], sHeader) == 0) {
- switch (i) {
- case 0:
- default: {
- //cout << "<Entity-Header>: #" << i << endl;
- Expect(':');
- Expect(' ');
- Skip(13);
- ExpectCRLF();
- return TRUE;
- }
- }
- return FALSE;
- }
- }
- return FALSE;
-}
-
-// MessageBody = *OCTET
-BOOL CHttpParser::MessageBody()
-{
- return FALSE;
-}
projects / reactos.git / blobdiff