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/*
** JNetLib
** Copyright (C) 2001 Nullsoft, Inc.
** Author: Justin Frankel
** File: httpserv.cpp - JNL HTTP GET/POST serving implementation
** License: see jnetlib.h
**
** This class just manages the http reply/sending, not where the data
** comes from, etc.
*/
#include "netinc.h"
#include "util.h"
#include "httpserv.h"
/*
States for m_state:
-1 error (connection closed, etc)
0 not read request yet.
1 reading headers
2 headers read, have not sent reply
3 sent reply
4 closed
*/
JNL_HTTPServ::JNL_HTTPServ(JNL_Connection *con)
{
m_con=con;
m_state=0;
m_reply_headers=0;
m_reply_string=0;
m_recv_request=0;
m_errstr=0;
m_reply_ready=0;
m_method = 0;
http_ver = 0;
keep_alive = 0;
}
JNL_HTTPServ::~JNL_HTTPServ()
{
free(m_recv_request);
free(m_reply_string);
free(m_reply_headers);
free(m_errstr);
free(m_method);
m_con->Release();
}
static size_t strlen_whitespace(const char *str)
{
size_t size=0;
while (str && *str && *str != ' ' && *str != '\r' && *str!='\n')
{
str++;
size++;
}
return size;
}
int JNL_HTTPServ::run()
{ // returns: < 0 on error, 0 on connection close, 1 if reading request, 2 if reply not sent, 3 if reply sent, sending data.
int cnt=0;
run_again:
m_con->run();
if (m_con->get_state()==JNL_Connection::STATE_ERROR)
{
seterrstr(m_con->get_errstr());
return -1;
}
if (m_con->get_state()==JNL_Connection::STATE_CLOSED)
return 4;
if (m_state == 0)
{
if (m_con->recv_lines_available()>0)
{
char *buf=(char*)malloc(m_con->recv_bytes_available()-1);
m_con->recv_line(buf,m_con->recv_bytes_available()-1);
free(m_recv_request);
m_recv_request=(char*)malloc(strlen(buf)+2);
strcpy(m_recv_request,buf);
m_recv_request[strlen(m_recv_request)+1]=0;
free(buf);
buf=m_recv_request;
while (buf && *buf) buf++;
while (buf >= m_recv_request && *buf != ' ') buf--;
if (strncmp(buf+1,"HTTP",4))// || strncmp(m_recv_request,"GET ",3))
{
seterrstr("malformed HTTP request");
m_state=-1;
}
else
{
http_ver = atoi(buf+8);
size_t method_len = strlen_whitespace(m_recv_request);
m_method = (char *)malloc(method_len + 1);
memcpy(m_method, m_recv_request, method_len);
m_method[method_len]=0;
m_state=1;
cnt=0;
if (buf >= m_recv_request) buf[0]=buf[1]=0;
buf=strstr(m_recv_request,"?");
if (buf)
{
*buf++=0; // change &'s into 0s now.
char *t=buf;
int stat=1;
while (t && *t)
{
if (*t == '&' && !stat) { stat=1; *t=0; }
else stat=0;
t++;
}
}
}
}
else if (!cnt++) goto run_again;
}
if (m_state == 1)
{
if (!cnt++ && m_con->recv_lines_available()<1) goto run_again;
while (m_con->recv_lines_available()>0)
{
char buf[4096] = {0};
m_con->recv_line(buf,4096);
if (!buf[0])
{
m_state=2;
break;
}
recvheaders.Add(buf);
}
}
if (m_state == 2)
{
if (m_reply_ready)
{
// send reply
m_con->send_string((char*)(m_reply_string?m_reply_string:"HTTP/1.1 200 OK"));
m_con->send_string("\r\n");
if (m_reply_headers) m_con->send_string(m_reply_headers);
m_con->send_string("\r\n");
m_state=3;
}
}
if (m_state == 3)
{
// nothing.
}
return m_state;
}
const char *JNL_HTTPServ::get_request_file()
{
// file portion of http request
if (!m_recv_request) return NULL;
char *t=m_recv_request;
while (t && *t && *t != ' ') t++;
if (!t || !*t) return NULL;
while (t && *t && *t == ' ') t++;
return t;
}
const char *JNL_HTTPServ::get_request_parm(const char *parmname) // parameter portion (after ?)
{
const char *t=m_recv_request;
while (t && *t) t++;
if (t) t++;
while (t && *t)
{
while (t && *t && *t == '&') t++;
if (!_strnicmp(t,parmname,strlen(parmname)) && t[strlen(parmname)] == '=')
{
return t+strlen(parmname)+1;
}
t+=strlen(t)+1;
}
return NULL;
}
const char *JNL_HTTPServ::getheader(const char *headername)
{
return recvheaders.GetHeader(headername);
}
void JNL_HTTPServ::set_reply_string(const char *reply_string) // should be HTTP/1.1 OK or the like
{
free(m_reply_string);
m_reply_string=(char*)malloc(strlen(reply_string)+1);
strcpy(m_reply_string,reply_string);
}
void JNL_HTTPServ::add_reply_header(const char *header) // "Connection: close" for example
{
// if they've specified a content-length, then we can keep alive an HTTP/1.1 connection
if (!keep_alive && http_ver == 1 && !_strnicmp(header, "Content-Length", 14))
keep_alive = 1;
if (m_reply_headers)
{
char *tmp=(char*)malloc(strlen(m_reply_headers)+strlen(header)+3);
strcpy(tmp,m_reply_headers);
strcat(tmp,header);
strcat(tmp,"\r\n");
free(m_reply_headers);
m_reply_headers=tmp;
}
else
{
m_reply_headers=(char*)malloc(strlen(header)+3);
strcpy(m_reply_headers,header);
strcat(m_reply_headers,"\r\n");
}
}
void JNL_HTTPServ::reset()
{
free(m_recv_request); m_recv_request = 0;
free(m_reply_string); m_reply_string = 0;
free(m_reply_headers); m_reply_headers = 0;
free(m_errstr); m_errstr = 0;
free(m_method); m_method =0;
m_reply_ready=0;
m_state = 0;
keep_alive = 0;
}
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