parse.c
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/**
* \file
*
* \author Georg Hopp
*
* \copyright
* Copyright (C) 2012 Georg Hopp
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include "http/parser.h"
#include "interface/class.h"
#include "interface/http_intro.h"
#include "cbuf.h"
#include "stream.h"
ssize_t
httpParserParse(void * _this, Stream st)
{
HttpParser this = _this;
int cont = 1;
ssize_t read;
char * line;
char * line_end;
if (cbufIsLocked(this->buffer)) {
if (FALSE == this->ourLock)
return 0;
}
else {
cbufLock(this->buffer);
this->ourLock = TRUE;
}
if (NULL != this->incomplete) {
cbufSetData(this->buffer, this->incomplete, this->isize);
free(this->incomplete);
this->incomplete = NULL;
}
if (0 > (read = cbufRead(this->buffer, st))) {
return read;
}
while (cont) {
switch(this->state) {
case HTTP_MESSAGE_GARBAGE:
cbufSkipNonAlpha(this->buffer);
if (! cbufIsEmpty(this->buffer)) {
this->state = HTTP_MESSAGE_START;
}
else {
cbufRelease(this->buffer);
this->ourLock = FALSE;
cont = 0;
}
break;
case HTTP_MESSAGE_START:
if (NULL == (line = cbufGetLine(this->buffer, &line_end))) {
if (! cbufIsEmpty(this->buffer)) {
this->isize = this->buffer->bused;
this->incomplete = malloc(this->isize);
memcpy(this->incomplete,
cbufGetData(this->buffer, this->isize),
this->isize);
}
cbufRelease(this->buffer);
this->ourLock = FALSE;
cont = 0;
break;
}
httpParserNewMessage(this, line, line_end);
if (NULL == this->current) {
cbufRelease(this->buffer);
this->ourLock = FALSE;
return -1;
}
this->state = HTTP_MESSAGE_INTRO_DONE;
break;
case HTTP_MESSAGE_INTRO_DONE:
if (NULL == (line = cbufGetLine(this->buffer, &line_end))) {
if (! cbufIsEmpty(this->buffer)) {
this->isize = this->buffer->bused;
this->incomplete = malloc(this->isize);
memcpy(this->incomplete,
cbufGetData(this->buffer, this->isize),
this->isize);
}
cbufRelease(this->buffer);
this->ourLock = FALSE;
cont = 0;
break;
}
if (0 == strlen(line)) {
this->state = HTTP_MESSAGE_HEADERS_DONE;
break;
}
httpParserHeader(this, line, line_end);
break;
case HTTP_MESSAGE_HEADERS_DONE:
if (this->current->dbody == this->current->nbody) {
this->state = HTTP_MESSAGE_DONE;
break;
}
if (cbufIsEmpty(this->buffer)) {
cbufRelease(this->buffer);
this->ourLock = FALSE;
cont = 0;
break;
}
cbufIncRead(
this->buffer,
httpParserBody(
this,
cbufGetRead(this->buffer),
this->buffer->bused));
break;
case HTTP_MESSAGE_DONE:
/**
* enqueue current request
*/
this->queue->msgs[(this->queue->nmsgs)++] = this->current;
this->current = NULL;
/**
* prepare for next request
*/
this->state = HTTP_MESSAGE_GARBAGE;
break;
default:
break;
}
}
return this->queue->nmsgs;
}
// vim: set ts=4 sw=4: