parse.c
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#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include "http/request/parser.h"
#include "interface/class.h"
#define REMAINS(pars) \
((pars)->buffer_used - ((pars)->cur_data - (pars)->buffer))
static
inline
char *
httpRequestParserGetLine(char ** data)
{
char * line_end = strstr(*data, "\r\n");
char * ret = *data;
if (NULL == line_end) {
return NULL;
}
*line_end = 0;
*data = line_end + 2;
return ret;
}
static
inline
void
httpRequestSkip(char ** data)
{
for (; 0 != **data && ! isalpha(**data); (*data)++);
}
void
httpRequestParserParse(HttpRequestParser this)
{
char * line;
int cont = 1;
while(cont) {
switch(this->state) {
case HTTP_REQUEST_GARBAGE:
this->cur_data = this->buffer; // initialize static pointer
httpRequestSkip(&(this->cur_data));
this->cur_request = new(HttpRequest);
this->state = HTTP_REQUEST_START;
break;
case HTTP_REQUEST_START:
if (NULL == (line = httpRequestParserGetLine(&(this->cur_data)))) {
cont = 0;
break;
}
httpRequestParserGetRequestLine(this->cur_request, line);
this->state = HTTP_REQUEST_REQUEST_LINE_DONE;
break;
case HTTP_REQUEST_REQUEST_LINE_DONE:
if (NULL == (line = httpRequestParserGetLine(&(this->cur_data)))) {
cont = 0;
break;
}
if (0 == strlen(line)) {
this->state = HTTP_REQUEST_HEADERS_DONE;
break;
}
httpRequestParserGetHeader(this->cur_request, line);
break;
case HTTP_REQUEST_HEADERS_DONE:
{
char * nbody;
if (0 == this->cur_request->nbody) {
nbody = httpHeaderGet(
&(this->cur_request->header),
"Content-Length");
if (NULL == nbody) {
this->state = HTTP_REQUEST_DONE;
break;
}
else {
this->cur_request->nbody = atoi(nbody);
}
}
if (REMAINS(this) >= this->cur_request->nbody) {
this->cur_request->body = calloc(1, this->cur_request->nbody + 1);
memcpy(this->cur_request->body,
this->cur_data,
this->cur_request->nbody);
this->cur_data += this->cur_request->nbody;
this->state = HTTP_REQUEST_DONE;
}
}
break;
case HTTP_REQUEST_DONE:
/**
* enqueue current request
*/
this->request_queue->requests[(this->request_queue->nrequests)++] =
this->cur_request;
/**
* remove processed stuff from input buffer.
*/
memmove(this->buffer, this->cur_data, REMAINS(this));
this->buffer_used -= this->cur_data - this->buffer;
/**
* dont continue loop if input buffer is empty
*/
if (0 == this->buffer_used) {
cont = 0;
}
/**
* prepare for next request
*/
this->state = HTTP_REQUEST_GARBAGE;
break;
default:
break;
}
}
}
// vim: set ts=4 sw=4: