CHttpParser Class Reference

#include <http.h>

Public Member Functions
	CHttpParser ()
	~CHttpParser ()
BOOL	Complete ()
BOOL	Parse ()

Public Attributes
CHAR	sBuffer [2048]
UINT	nHead
UINT	nTail
CHAR	sUri [255]
CHAR	sVersion [15]
CHAR	sHeader [63]
CHAR	sMethod [63]
UINT	nMethodNo
BOOL	bUnknownMethod
BOOL	bBadRequest

Private Member Functions
BOOL	ReadChar (LPSTR lpsStr)
BOOL	PeekChar (LPSTR lpsStr)
BOOL	ReadString (LPSTR lpsStr, UINT nLength)
BOOL	ReadSpecial (LPSTR lpStr, UINT nLength)
VOID	Skip (CHAR sStr)
BOOL	Expect (CHAR sStr)
BOOL	ExpectCRLF ()
BOOL	RequestLine ()
BOOL	GenerelHeader ()
BOOL	RequestHeader ()
BOOL	EntityHeader ()
BOOL	MessageBody ()

Detailed Description

Definition at line 26 of file http.h.

Constructor & Destructor Documentation

CHttpParser()

CHttpParser::CHttpParser

(

)

Definition at line 37 of file http.cpp.

{
    nHead = 0;
    nTail = 0;
}

~CHttpParser()

CHttpParser::~CHttpParser

(

)

Definition at line 44 of file http.cpp.

{
}

Member Function Documentation

Complete()

BOOL CHttpParser::Complete

(

)

Definition at line 49 of file http.cpp.

{
    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;
}

Referenced by CHttpClient::OnRead().

EntityHeader()

BOOL CHttpParser::EntityHeader ( )

private

Definition at line 350 of file http.cpp.

{
    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;
}

Referenced by Parse().

Expect()

BOOL CHttpParser::Expect ( CHAR  sStr )

private

Definition at line 170 of file http.cpp.

{
    CHAR sTmp;
 
    if (PeekChar(&sTmp)) {
        if (sTmp == sCh) {
            ReadChar(&sTmp);
            return TRUE;
        }
    }
    return FALSE;
}

Referenced by EntityHeader(), ExpectCRLF(), GenerelHeader(), RequestHeader(), and RequestLine().

ExpectCRLF()

BOOL CHttpParser::ExpectCRLF ( )

private

Definition at line 184 of file http.cpp.

{
    return (Expect(13) && Expect(10));
}

Referenced by EntityHeader(), GenerelHeader(), Parse(), RequestHeader(), and RequestLine().

GenerelHeader()

BOOL CHttpParser::GenerelHeader ( )

private

Definition at line 253 of file http.cpp.

{
    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;
}

Referenced by Parse().

MessageBody()

BOOL CHttpParser::MessageBody ( )

private

Definition at line 374 of file http.cpp.

{
    return FALSE;
}

Referenced by Parse().

Parse()

BOOL CHttpParser::Parse

(

)

Definition at line 191 of file http.cpp.

{
    BOOL bStatus;
 
    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;
}

Referenced by Complete().

PeekChar()

BOOL CHttpParser::PeekChar ( LPSTR  lpsStr )

private

Definition at line 98 of file http.cpp.

{
    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;
    }
}

Referenced by Expect(), ReadSpecial(), ReadString(), RequestLine(), and Skip().

ReadChar()

BOOL CHttpParser::ReadChar ( LPSTR  lpsStr )

private

Definition at line 72 of file http.cpp.

{
    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;
        }
    }
}

Referenced by Expect(), ReadSpecial(), ReadString(), and Skip().

ReadSpecial()

BOOL CHttpParser::ReadSpecial ( LPSTR  lpStr, UINT  nLength  )

private

Definition at line 142 of file http.cpp.

{
    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;
}

Referenced by RequestLine().

ReadString()

BOOL CHttpParser::ReadString ( LPSTR  lpsStr, UINT  nLength  )

private

Definition at line 116 of file http.cpp.

{
    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;
}

Referenced by Parse(), and RequestLine().

RequestHeader()

BOOL CHttpParser::RequestHeader ( )

private

Definition at line 285 of file http.cpp.

{
    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;
}

Referenced by Parse().

RequestLine()

BOOL CHttpParser::RequestLine ( )

private

Definition at line 213 of file http.cpp.

{
    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;
}

Referenced by Parse().

Skip()

VOID CHttpParser::Skip ( CHAR  sStr )

private

Definition at line 161 of file http.cpp.

{
    CHAR sTmp;
 
    while (PeekChar(&sTmp) && (sTmp != sCh))
        ReadChar(&sTmp);
}

Referenced by EntityHeader(), GenerelHeader(), and RequestHeader().

Member Data Documentation

bBadRequest

BOOL CHttpParser::bBadRequest

Definition at line 37 of file http.h.

bUnknownMethod

BOOL CHttpParser::bUnknownMethod

Definition at line 36 of file http.h.

Referenced by Complete(), CHttpClient::OnRead(), and RequestLine().

nHead

UINT CHttpParser::nHead

Definition at line 29 of file http.h.

Referenced by CHttpParser(), CHttpClient::OnRead(), PeekChar(), and ReadChar().

nMethodNo

UINT CHttpParser::nMethodNo

Definition at line 35 of file http.h.

Referenced by CHttpClient::ProcessRequest(), and RequestLine().

nTail

UINT CHttpParser::nTail

Definition at line 30 of file http.h.

Referenced by CHttpParser(), Complete(), PeekChar(), and ReadChar().

sBuffer

CHAR CHttpParser::sBuffer[2048]

Definition at line 28 of file http.h.

Referenced by CHttpClient::OnRead(), PeekChar(), and ReadChar().

sHeader

CHAR CHttpParser::sHeader[63]

Definition at line 33 of file http.h.

Referenced by EntityHeader(), GenerelHeader(), Parse(), and RequestHeader().

sMethod

CHAR CHttpParser::sMethod[63]

Definition at line 34 of file http.h.

Referenced by RequestLine().

sUri

CHAR CHttpParser::sUri[255]

Definition at line 31 of file http.h.

Referenced by CHttpClient::ProcessRequest(), and RequestLine().

sVersion

CHAR CHttpParser::sVersion[15]

Definition at line 32 of file http.h.

Referenced by RequestLine().

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The documentation for this class was generated from the following files:

• modules/rosapps/applications/net/roshttpd/include/http.h
• modules/rosapps/applications/net/roshttpd/http.cpp