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// HTTP_Service.cpp -- simple implementation of the HTTP protocol
#include "HTTP_Handler.h"
HTTP_Handler::HTTP_Handler(void)
{
sockbufp_ = sockbuf_;
sockbufn_ = 0;
}
int
HTTP_Handler::open (void *)
{
this->svc();
this->close();
return 0;
}
int
HTTP_Handler::svc (void)
{
int result;
int serve_result = 1;
const int OK = HTTP_Status_Code::STATUS_OK;
HTTP_VFS_Node *handle;
if ((result = this->parse_request()) == OK
&& (result = HTTP_VFS::open(this->requestURI_, handle)) == OK) {
serve_result = this->serve_file(handle);
this->peer().close();
HTTP_VFS::close(handle);
}
else if (result == -1) {
this->peer().close();
return -1;
}
else {
serve_result = this->serve_error(result);
this->peer().close();
}
return serve_result;
}
int
HTTP_Handler::parse_request (void)
{
// read in the HTTP request
// --
// What is really needed here is a real tokenizer and parser.
// (1) It would allow someone to more easily plug in protocol revisions.
// (2) Code would be easier to understand and maintain.
int found = 0;
int first = 1;
method_[0] = '\0';
requestURI_[0] = '\0';
HTTPversion_[0] = '\0';
// ACE_HANDLE handle = this->peer().get_handle();
// ACE_Handle_Set handle_set;
// handle_set.set_bit(handle);
// if (ACE_OS::select(handle+1, handle_set, 0, 0, (ACE_Time_Value *)0) == -1)
// return HTTP_Status_Code::STATUS_BAD_REQUEST;
if (this->sockgets(buf_, sizeof(buf_)) == 0)
return -1;
do {
// Blank line means we are done
if (ACE_OS::strcmp(buf_, "\r\n") == 0
|| ACE_OS::strcmp(buf_, "\n") == 0) {
if (first) ACE_DEBUG((LM_DEBUG, "Whups\n"));
break;
}
// if (!found && requestRE_.regex(buf_, path_)) found = 1;
// ^^
// Old way of doing it. Maybe below will be a little faster.
if (first) {
char *lasts;
char *tok;
if ((tok = ACE_OS::strtok_r(buf_, " \r\n\t", &lasts)) != 0) {
ACE_OS::strcpy(method_, tok);
if ((tok = ACE_OS::strtok_r(0, " \r\n\t", &lasts)) != 0) {
ACE_OS::strcpy(requestURI_, tok);
if ((tok = ACE_OS::strtok_r(0, " \r\n\t", &lasts)) != 0) {
ACE_OS::strcpy(HTTPversion_, tok+5);
found = 1;
}
else {
if (ACE_OS::strcmp(method_, "GET") == 0) {
ACE_OS::strcpy(HTTPversion_, "0.9");
found = 2;
}
}
}
}
// Request must be the first line of HTTP request
first = 0;
}
} while (this->sockgets(buf_, sizeof(buf_)) != 0);
if (found == 0) {
return HTTP_Status_Code::STATUS_BAD_REQUEST;
}
if (ACE_OS::strcmp(method_, "GET") != 0)
return HTTP_Status_Code::STATUS_NOT_IMPLEMENTED;
fix_path(requestURI_);
return HTTP_Status_Code::STATUS_OK;
}
int
HTTP_Handler::serve_error (int status_code)
{
static char const errormessage[] =
"HTTP/1.0 %d %s\r\n"
"Content-type: text/html\r\n"
"\r\n"
"<html>\n"
"<head><title>Error message</title></head>\n"
"<body>\n"
"<h1>Error %d: %s</h1>"
"Could not access file: %s.\n"
"</body>\n"
"</html>\n"
;
int len = sprintf(this->buf_, errormessage,
status_code, HTTP_Status_Code::instance()[status_code],
status_code, HTTP_Status_Code::instance()[status_code],
requestURI_);
this->peer().send_n(this->buf_, len);
ACE_DEBUG((LM_DEBUG, "in HTTP_Handler::serve_error(%d), %s\n",
status_code, this->path_));
return 0;
}
int
HTTP_Handler::serve_directory (void)
{
// We'll just forbid it for now.
return this->serve_error(403);
}
int
HTTP_Handler::serve_file (HTTP_VFS_Node * &vf)
{
// Just a simple response for this simple server.
// --
// In a real server, detect what kind of request we got,
// and respond in kind.
// simple-request -> simple-response
// full-request -> full-response
this->peer().send_n(vf->File(), vf->Size());
this->peer().send_n("\r\n", 2);
return 0;
}
void
HTTP_Handler::fix_path (char *path)
{
// fix the path if it needs fixing/is fixable
// replace the percentcodes with the actual character
int i,j;
char percentcode[3];
for (i = j = 0; path_[i] != '\0'; i++,j++) {
if (path_[i] == '%') {
percentcode[0] = path[++i];
percentcode[1] = path[++i];
percentcode[2] = '\0';
path[j] = strtol(percentcode, (char **)0, 16);
}
else path[j] = path[i];
}
path[j] = path[i];
}
// ---------------------------------------- //
int
HTTP_Handler::sockgetc(void)
{
if (sockbufn_ == 0) {
// buffer is empty
sockbufn_ = this->peer().recv(sockbuf_, sizeof(sockbuf_));
sockbufp_ = sockbuf_;
}
return (--sockbufn_ >= 0) ? (unsigned char) *sockbufp_++ : -1;
}
int
HTTP_Handler::sockputc(char const c)
{
// int n = this->peer().tv_send_n(&c, 1, ACE_Time_Value(5));
int n = this->peer().send_n(&c, 1);
return (n == 1) ? c : EOF;
}
int
HTTP_Handler::sockputs(char const *s)
{
int len = ACE_OS::strlen(s);
// int n = this->peer().tv_send_n(s, len, ACE_Time_Value(5));
int n = this->peer().send_n(s, len);
return (n >= 0) ? n : EOF;
}
char *
HTTP_Handler::sockgets(char *buf, int n)
{
int c;
char *cbuf;
cbuf = buf;
while (--n > 0 && (c = this->sockgetc()) != -1) {
if ((*cbuf++ = c) == '\n')
break;
}
*cbuf = '\0';
return (c == EOF && cbuf == buf) ? NULL : buf;
}
// ---------------------------------------- //
// This is necessary for gcc to work with templates
#if defined (ACE_TEMPLATES_REQUIRE_SPECIALIZATION)
template class ACE_Acceptor<HTTP_Handler, ACE_SOCK_ACCEPTOR>;
template class Sock_Acceptor_Adapter<HTTP_Handler>;
#endif /* ACE_TEMPLATES_REQUIRE_SPECIALIZATION */
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