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hypercube/http.c

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#include "hypercube.h"
http_fd_entry http_fds[ASIO_MAX_FDS];
static akbuf_ctxh http_ctx;
static akbuf *parsebufs[8];
extern hypercube_config cfg;
void http_init(void)
{
unsigned int i;
http_ctx = akbuf_new_ctx();
for (i = 0; i < sizeof(parsebufs) / sizeof(parsebufs[0]); i ++) parsebufs[i] = akbuf_init(http_ctx, 0);
for (i = 0; i < ASIO_MAX_FDS; i ++) http_fds[i].state = HTTP_FD_UNUSED;
}
void http_unset_fd(int fd)
{
if (http_fds[fd].state != HTTP_FD_UNUSED)
{
if (http_fds[fd].state != HTTP_FD_CGI) aklogf(LOG_CONNECTION, "Client on socket %d disconnected.", fd);
http_fds[fd].state = HTTP_FD_UNUSED;
}
}
void http_handle_sent(int fd, net_fd_entry *net_ent)
{
DEBUGF("send on socket %d done", fd);
if (http_fds[fd].keep_alive == 0)
{
net_unset_fd(fd);
} else
{
http_fds[fd].state = HTTP_FD_NEW_REQ;
}
}
unsigned char *http_status_msg(unsigned int code)
{
switch (code)
{
case HTTP_OK: return "OK";
case HTTP_PARTIAL_CONTENT: return "Partial content";
case HTTP_MOVED_PERM: return "Moved permanently";
case HTTP_BAD_REQUEST: return "Bad request";
case HTTP_FORBIDDEN: return "Forbidden";
case HTTP_NOT_FOUND: return "Not found";
case HTTP_INTERNAL_ERROR: return "Internal error";
case HTTP_SERVER_TOO_BUSY: return "Server too busy";
case HTTP_LOG_HOOK: return "Handled by hook";
case HTTP_FORBIDDEN_BANNED: return "Forbidden (client banned)";
}
return "Unspecified";
}
unsigned char *http_method_str(unsigned int method)
{
switch (method)
{
case HTTP_METHOD_GET: return "GET";
case HTTP_METHOD_HEAD: return "HEAD";
case HTTP_METHOD_POST: return "POST";
}
return "(none)";
}
void http_log_query(int fd, net_fd_entry *net_ent, unsigned int code)
{
unsigned char *ua_p, *ref_p, *host_p;
if ((host_p = akbuf_table_entry_get_str(http_fds[fd].headers, "Host")) == NULL) host_p = "(none)";
if ((ua_p = akbuf_table_entry_get_str(http_fds[fd].headers, "User-agent")) == NULL) ua_p = "(none)";
if ((ref_p = akbuf_table_entry_get_str(http_fds[fd].headers, "Referer")) == NULL) ref_p = "(none)";
akbuf_asciiz(net_ent->peerbuf);
akbuf_asciiz(http_fds[fd].uri);
aklogf(LOG_REQUEST, "HTTP/%u.%u %d %s %s \"%s\" %u \"%s\" \"%s\" \"%s\" \"%s\"",
http_fds[fd].ver_maj, http_fds[fd].ver_min,
fd,
akbuf_data(net_ent->peerbuf),
http_method_str(http_fds[fd].method), akbuf_data(http_fds[fd].uri),
(code == HTTP_LOG_HOOK)? HTTP_OK : code, http_status_msg(code),
host_p, ref_p, ua_p);
}
void http_error(int fd, net_fd_entry *net_ent, unsigned int code)
{
unsigned char *msg;
http_log_query(fd, net_ent, code);
msg = http_status_msg(code);
if (code >= 2000) code -= 2000;
http_fds[fd].keep_alive = 0;
akbuf_sprintf(net_ent->sendbuf,
"HTTP/1.1 %u %s\r\n"
"Server: " SERVER_VERSION "\r\n"
"Content-type: text/html\r\n"
"Connection: close\r\n"
"\r\n"
"<HTML><HEAD><TITLE>%u %s</TITLE></HEAD><BODY><H3>%u %s</H3></BODY></HTML>\r\n",
code, msg,
code, msg, code, msg);
net_send(fd);
}
unsigned char *get_mime_type(unsigned char *filename)
{
unsigned int i;
unsigned char *p;
i = strlen(filename);
while (i >= 1) { if (filename[i - 1] == '.') break; i --; }
if (i > 0)
{
DEBUGF("get_mime_type() extension %s", &filename[i]);
if ((p = akbuf_table_entry_get_str(cfg.mime_types, &filename[i])) != NULL) return p;
}
return "application/octet-stream";
}
void cgi_handle_output(int fd, net_fd_entry *net_ent, akbuf *buf)
{
if (http_fds[fd].rpipe_net_ent->type == HTTP_FD_UNUSED)
{
net_unset_fd(fd);
return;
}
akbuf_append_buf(http_fds[fd].rpipe_net_ent->sendbuf, buf);
net_send(http_fds[fd].rpipe_fd);
}
void cgi_handle_sent_content(int fd, net_fd_entry *net_ent, akbuf *buf)
{
net_unset_fd(fd);
}
int serve_cgi_to_fd(int fd, net_fd_entry *net_ent, unsigned char *cgi_name)
{
int cgi_rpipe[2], cgi_wpipe[2];
/* parsebufs: 0,1,2 == env var tmp */
unsigned int has_content;
DEBUGF("serving cgi [%s]", cgi_name);
cgi_rpipe[0] = cgi_rpipe[1] = -1;
if (pipe(cgi_rpipe) != 0 || !FD_VALID(cgi_rpipe[0]) || !FD_VALID(cgi_rpipe[1]))
{
if (cgi_rpipe[0] != -1) close(cgi_rpipe[0]);
if (cgi_rpipe[1] != -1) close(cgi_rpipe[1]);
http_error(fd, net_ent, HTTP_SERVER_TOO_BUSY);
return -2;
}
if (http_fds[fd].method == HTTP_METHOD_POST && http_fds[fd].content_len > 0)
{
has_content = 1;
cgi_wpipe[0] = cgi_wpipe[1] = -1;
if (pipe(cgi_wpipe) != 0 || !FD_VALID(cgi_wpipe[0]) || !FD_VALID(cgi_wpipe[1]))
{
if (cgi_wpipe[0] != -1) close(cgi_wpipe[0]);
if (cgi_wpipe[1] != -1) close(cgi_wpipe[1]);
http_error(fd, net_ent, HTTP_SERVER_TOO_BUSY);
return -2;
}
} else
{
has_content = 0;
}
if (fork() == 0)
{
unsigned char *envs[64];
unsigned int i;
int j;
if (has_content == 1)
{
close(cgi_wpipe[1]);
dup2(cgi_wpipe[0], 0);
}
close(cgi_rpipe[0]);
dup2(cgi_rpipe[1], 1);
i = 0;
/* We can use strdup() here because the process will end anyway. */
akbuf_sprintf(parsebufs[0], "GATEWAY_INTERFACE=CGI/1.1");
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
akbuf_asciiz(http_fds[fd].query);
akbuf_sprintf(parsebufs[0], "QUERY_STRING=%s", akbuf_data(http_fds[fd].query));
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
akbuf_sprintf(parsebufs[0], "PATH=" CGI_DEFAULT_PATH);
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
akbuf_sprintf(parsebufs[0], "SERVER_SOFTWARE=" SERVER_VERSION);
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
akbuf_sprintf(parsebufs[0], "SERVER_PROTOCOL=HTTP/%u.%u", http_fds[fd].ver_maj, http_fds[fd].ver_min);
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
akbuf_clone(parsebufs[1], net_ent->peerbuf);
if ((j = akbuf_chr(parsebufs[1], ':')) != -1)
{
akbuf_split(parsebufs[1], parsebufs[2], j);
akbuf_asciiz(parsebufs[1]);
akbuf_sprintf(parsebufs[0], "REMOTE_ADDR=%s", akbuf_data(parsebufs[2]));
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
akbuf_sprintf(parsebufs[0], "REMOTE_PORT=%s", akbuf_data(parsebufs[1]));
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
}
akbuf_sprintf(parsebufs[0], "SCRIPT_FILENAME=%s", cgi_name);
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
akbuf_sprintf(parsebufs[0], "REQUEST_METHOD=%s", http_method_str(http_fds[fd].method));
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
akbuf_asciiz(http_fds[fd].uri);
akbuf_sprintf(parsebufs[0], "REQUEST_URI=%s", akbuf_data(http_fds[fd].uri));
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
if (has_content == 1)
{
akbuf_sprintf(parsebufs[0], "CONTENT_LENGTH=%u", (unsigned int)http_fds[fd].content_len);
akbuf_asciiz(parsebufs[0]);
envs[i ++] = strdup(akbuf_data(parsebufs[0]));
}
envs[i] = NULL;
execle(cgi_name, cgi_name, NULL, envs);
akperror("execve() CGI script");
exit(1);
}
if (has_content == 1)
{
close(cgi_wpipe[0]);
net_set_fd(cgi_wpipe[1], NET_FD_SEND, NULL, cgi_handle_sent_content, 1);
net_send_buf(cgi_wpipe[1], http_fds[fd].content);
http_fds[fd].wpipe_fd = cgi_wpipe[1];
}
DEBUGF("wpipe_fd %d", http_fds[fd].wpipe_fd);
close(cgi_rpipe[1]);
net_set_fd(cgi_rpipe[0], NET_FD_READ, cgi_handle_output, NULL, 1);
http_fds[cgi_rpipe[0]].rpipe_fd = fd;
http_fds[cgi_rpipe[0]].rpipe_net_ent = net_ent;
http_fds[cgi_rpipe[0]].ctx = http_fds[fd].ctx;
http_fds[cgi_rpipe[0]].state = HTTP_FD_CGI;
http_fds[cgi_rpipe[0]].method = HTTP_METHOD_NONE;
http_fds[cgi_rpipe[0]].uri = NULL;
http_fds[cgi_rpipe[0]].query = NULL;
http_fds[cgi_rpipe[0]].ver_maj = http_fds[fd].ver_min = 0;
http_fds[cgi_rpipe[0]].keep_alive = 0;
http_fds[cgi_rpipe[0]].num_headers = 0;
http_fds[cgi_rpipe[0]].headers = NULL;
http_fds[cgi_rpipe[0]].num_args = 0;
http_fds[cgi_rpipe[0]].args = NULL;
http_fds[fd].state = HTTP_FD_PIPING;
http_fds[fd].rpipe_fd = cgi_rpipe[0];
net_set_callbacks(fd, NULL, NULL);
akbuf_sprintf(net_ent->sendbuf,
"HTTP/1.1 %u OK\r\n"
"Server: " SERVER_VERSION "\r\n"
"Connection: close\r\n",
HTTP_OK);
net_send(fd);
return 0;
}
/* return: 0 == all ok; -1 == error, show errorpage; -2 == error, errorpage shown */
int serve_doc_to_fd(int fd, net_fd_entry *net_ent, unsigned char *orig_doc_name, unsigned char *doc_name, unsigned int doc_off, AKsize_t doc_size, unsigned int add_gzip_header)
{
unsigned char *mime_type;
unsigned char timebuf[512];
unsigned int code;
struct stat st;
DEBUGF("serve_doc_to_fd() orig [%s] real [%s]", orig_doc_name, doc_name);
mime_type = get_mime_type(orig_doc_name);
if (strcasecmp(mime_type, CGI_MIME_TYPE) == 0)
{
return serve_cgi_to_fd(fd, net_ent, orig_doc_name);
}
if (access(doc_name, R_OK) != 0) return -1;
http_log_query(fd, net_ent, HTTP_OK);
if (http_fds[fd].method != HTTP_METHOD_HEAD && (net_ent->send_fd = open(doc_name, O_RDONLY)) < 0) return -1;
if (doc_off >= doc_size) doc_off = (doc_size > 0)? doc_size - 1 : 0;
net_ent->send_fd_off = doc_off;
net_ent->send_fd_len = doc_size - doc_off;
code = (doc_off != 0)? HTTP_PARTIAL_CONTENT : HTTP_OK;
if (http_fds[fd].ver_maj > 0)
{
if (stat(doc_name, &st) == 0)
{
size_t len;
struct tm *tmp;
time_t t;
t = time(NULL);
tmp = gmtime(&t);
if ((len = strftime(timebuf, sizeof(timebuf), "%a, %d %b %Y %H:%M:%S %Z", tmp)) == 0) timebuf[0] = 0;
} else
{
timebuf[0] = 0;
}
if (code == HTTP_PARTIAL_CONTENT)
{
akbuf_sprintf(net_ent->sendbuf,
"HTTP/1.1 %u %s\r\n"
"Server: " SERVER_VERSION "\r\n"
"Content-type: %s\r\n"
"Content-length: %u\r\n"
"Content-range: bytes %u-%u/%u\r\n"
"Connection: %s\r\n"
"Last-Modified: %s\r\n"
"\r\n",
code, http_status_msg(code),
get_mime_type(orig_doc_name),
doc_size - doc_off,
doc_off, (doc_size == 0)? 0 : doc_size - 1, doc_size,
(http_fds[fd].keep_alive == 1)? "keep-alive" : "close",
timebuf);
} else
{
if (add_gzip_header == 1)
{
akbuf_sprintf(net_ent->sendbuf,
"HTTP/1.1 %u %s\r\n"
"Server: " SERVER_VERSION "\r\n"
"Content-type: %s\r\n"
"Content-length: %u\r\n"
"Connection: %s\r\n"
"Last-Modified: %s\r\n"
"Content-Encoding: gzip\r\n"
"\r\n",
code, http_status_msg(code),
get_mime_type(orig_doc_name),
doc_size - doc_off,
(http_fds[fd].keep_alive == 1)? "keep-alive" : "close",
timebuf);
} else
{
akbuf_sprintf(net_ent->sendbuf,
"HTTP/1.1 %u %s\r\n"
"Server: " SERVER_VERSION "\r\n"
"Content-type: %s\r\n"
"Content-length: %u\r\n"
"Connection: %s\r\n"
"Last-Modified: %s\r\n"
"\r\n",
code, http_status_msg(code),
get_mime_type(orig_doc_name),
doc_size - doc_off,
(http_fds[fd].keep_alive == 1)? "keep-alive" : "close",
timebuf);
}
}
}
net_send(fd);
return 0;
}
void http_dir_index(int fd, net_fd_entry *net_ent, unsigned char *dir_path)
{
DIR *dir;
struct dirent *de;
struct stat st;
/* parsebufs: 4 == generated document, 5 == appended data */
if ((dir = opendir(dir_path)) == NULL)
{
http_error(fd, net_ent, (errno == EPERM)? HTTP_FORBIDDEN : HTTP_NOT_FOUND);
return;
}
http_log_query(fd, net_ent, HTTP_OK);
akbuf_asciiz(http_fds[fd].uri);
akbuf_sprintf(parsebufs[4],
"<HTML>\n"
"<HEAD><TITLE>Index of %s</TITLE></HEAD>\n"
"<BODY>\n"
"<H3>Index of %s</H3>\n",
akbuf_data(http_fds[fd].uri), akbuf_data(http_fds[fd].uri));
while ((de = readdir(dir)) != NULL)
{
akbuf_sprintf(parsebufs[5], "%s/%s", dir_path, de->d_name);
akbuf_asciiz(parsebufs[5]);
if (stat(akbuf_data(parsebufs[5]), &st) == 0)
{
akbuf_sprintf(parsebufs[5], "<A HREF=\"%s%s\">%s%s</A> %u<BR>\n", de->d_name, (st.st_mode & S_IFDIR)? "/" : "", de->d_name, (st.st_mode & S_IFDIR)? "/" : "", st.st_size);
akbuf_append_buf(parsebufs[4], parsebufs[5]);
}
}
closedir(dir); /* :-D */
akbuf_sprintf(parsebufs[5], "</BODY></HTML>\n");
akbuf_append_buf(parsebufs[4], parsebufs[5]);
if (http_fds[fd].ver_maj > 0)
{
akbuf_sprintf(net_ent->sendbuf,
"HTTP/1.1 %u OK\r\n"
"Server: " SERVER_VERSION "\r\n"
"Content-type: text/html\r\n"
"Content-length: %u\r\n"
"Connection: %s\r\n"
"\r\n",
HTTP_OK,
akbuf_idx(parsebufs[4]),
(http_fds[fd].keep_alive == 1)? "keep-alive" : "close");
}
akbuf_append_buf(net_ent->sendbuf, parsebufs[4]);
}
unsigned int http_has_access(akbuf *peerbuf, akbuf *uri)
{
akbuf_table_entry *ent;
akbuf *addrbuf;
akbuf_ctxh ctx;
int i;
ctx = akbuf_new_ctx();
addrbuf = akbuf_init(ctx, 0);
akbuf_clone(addrbuf, peerbuf);
if ((i = akbuf_chr(addrbuf, ':')) != -1) akbuf_set_byte(addrbuf, i, 0);
ent = cfg.allow_clients->head;
while (ent != NULL)
{
if (regexec((regex_t *)akbuf_data(ent->key), akbuf_data(addrbuf), 0, NULL, 0) == 0)
{
akbuf_asciiz(ent->data);
akbuf_asciiz(uri);
if (strncmp(akbuf_data(uri), akbuf_data(ent->data), akbuf_idx(ent->data)) == 0)
{
DEBUGF("check_access match [%s] [%s]", akbuf_data(addrbuf), akbuf_data(uri));
break;
}
}
ent = ent->next;
}
if (ent != NULL) return 1;
ent = cfg.deny_clients->head;
while (ent != NULL)
{
if (regexec((regex_t *)akbuf_data(ent->key), akbuf_data(addrbuf), 0, NULL, 0) == 0)
{
akbuf_asciiz(ent->data);
akbuf_asciiz(uri);
if (strncmp(akbuf_data(uri), akbuf_data(ent->data), akbuf_idx(ent->data)) == 0)
{
DEBUGF("check_access match [%s] [%s]", akbuf_data(addrbuf), akbuf_data(uri));
break;
}
}
ent = ent->next;
}
akbuf_free_ctx(ctx);
return (ent == NULL)? 1 : 0;
}
void http_do_rewrite(akbuf *rbuf)
{
akbuf_table_entry *ent;
unsigned int i, c, rem;
regmatch_t matches[10];
/* parsebufs: 6 == saved original rbuf */
akbuf_asciiz(rbuf);
DEBUGF("doing rewrite on [%s]", akbuf_data(rbuf));
ent = cfg.rewrite_rules->head;
while (ent != NULL)
{
if (regexec((regex_t *)akbuf_data(ent->key), akbuf_data(rbuf), sizeof(matches) / sizeof(matches[0]), matches, 0) == 0)
{
DEBUGF("rewrite regexec() match");
akbuf_clone(parsebufs[6], rbuf);
akbuf_set_idx(rbuf, 0);
i = 0;
rem = akbuf_idx(ent->data);
while (rem > 0)
{
akbuf_get_byte(ent->data, i, c); i ++; rem --;
switch (c)
{
case '\\':
if (rem >= 1)
{
akbuf_get_byte(ent->data, i, c); i ++; rem --;
akbuf_append_byte(rbuf, c);
} else
{
aklogf(LOG_ERROR, "Error in rewrite rule: Stray \\ at end of line.");
}
break;
case '$':
if (rem >= 1)
{
akbuf_get_byte(ent->data, i, c) i ++; rem --;
c -= '0';
if (c >= sizeof(matches) / sizeof(matches[0]) || matches[c].rm_so == -1)
{
aklogf(LOG_ERROR, "Erorr in rewrite rule: Unknown variable $%u.", c);
break;
}
AKassert(matches[c].rm_eo >= matches[c].rm_so);
akbuf_append_data(rbuf, akbuf_data(parsebufs[6]) + matches[c].rm_so, matches[c].rm_eo - matches[c].rm_so);
}
break;
default:
akbuf_append_byte(rbuf, c);
break;
}
}
return;
} else
{
DEBUGF("rewrite regexec() nomatch");
}
ent = ent->next;
}
}
void http_index(int fd, net_fd_entry *net_ent, unsigned char *dir_path, unsigned int doc_off)
{
unsigned int diridx;
unsigned int i;
struct stat st;
unsigned char *indexdocs[] = { "index.html", "index.htm", NULL };
/* parsebufs: 3 == full path to try */
akbuf_strcpy(parsebufs[3], dir_path);
akbuf_append_byte(parsebufs[3], '/');
diridx = akbuf_idx(parsebufs[3]);
i = 0;
while (indexdocs[i] != NULL)
{
akbuf_append_str(parsebufs[3], indexdocs[i]);
akbuf_asciiz(parsebufs[3]);
DEBUGF("trying index '%s'", akbuf_data(parsebufs[3]));
if (stat(akbuf_data(parsebufs[3]), &st) == 0 && st.st_mode & S_IFREG)
{
if (serve_doc_to_fd(fd, net_ent, akbuf_data(parsebufs[3]), akbuf_data(parsebufs[3]), doc_off, st.st_size, 0) == 0) break;
}
akbuf_set_idx(parsebufs[3], diridx);
i ++;
}
if (indexdocs[i] == NULL) http_dir_index(fd, net_ent, dir_path);
}
unsigned int http_parse_range(akbuf *range)
{
int i;
unsigned int cur_val, c;
/* XXX support for ranges other than bytes=###- */
if ((i = akbuf_chr(range, '=')) == -1 || ++ i >= akbuf_idx(range)) return 0;
cur_val = 0;
for (; i < akbuf_idx(range); i ++)
{
akbuf_get_byte(range, i, c);
if (c > '9' || c < '0') break;
c -= '0';
cur_val *= 10;
cur_val += c;
}
DEBUGF("got range %u", cur_val);
return cur_val;
}
int http_serve_hook(int fd, net_fd_entry *net_ent)
{
struct serve_hook_entry
{
unsigned char *uri;
void (*serve_fn)();
} serve_hooks[] =
{
{ "announce", tracker_serve_announce },
{ "announce.php", tracker_serve_announce },
{ "announcephp", tracker_serve_announce },
{ "scrape", tracker_serve_scrape },
{ "scrape.php", tracker_serve_scrape },
{ "scrapephp", tracker_serve_scrape },
{ "status", tracker_serve_status },
{ "peers", tracker_serve_peers },
{ NULL, NULL },
};
unsigned int i;
akbuf_ctxh ctx;
akbuf *uribuf;
akbuf_asciiz(http_fds[fd].uri);
ctx = akbuf_new_ctx();
uribuf = akbuf_init(ctx, 0);
akbuf_clone(uribuf, http_fds[fd].uri);
while (akbuf_idx(uribuf) > 1 && akbuf_data(uribuf)[0] == '/') akbuf_eat_byte(uribuf);
akbuf_asciiz(uribuf);
i = 0;
while (serve_hooks[i].uri != NULL)
{
if (strcmp(akbuf_data(uribuf), serve_hooks[i].uri) == 0)
{
http_log_query(fd, net_ent, HTTP_LOG_HOOK);
serve_hooks[i].serve_fn(fd, &http_fds[fd], net_ent);
akbuf_free_ctx(ctx);
return i;
}
i ++;
}
akbuf_free_ctx(ctx);
return -1;
}
void http_serve_req(int fd, net_fd_entry *net_ent)
{
unsigned char *root_dir, *host_p, *p;
akbuf_ctxh ctx;
akbuf *host_buf, *buf;
unsigned char resolved_path[PATH_MAX + 1], resolved_root[PATH_MAX + 1];
struct stat st, st2;
int i;
unsigned int range_start;
/* parsebufs: 0 == req path 1 == req path */
#define SERVE_ERR(code)\
{\
http_error(fd, net_ent, (code));\
akbuf_free_ctx(ctx);\
return;\
}
DEBUGF("serving req");
ctx = akbuf_new_ctx();
if ((p = akbuf_table_entry_get_str(http_fds[fd].headers, "Connection")) != NULL)
{
DEBUGF("header connection = %s", p);
if (strcasecmp(p, "keep-alive") == 0) http_fds[fd].keep_alive = 1;
else if (strcasecmp(p, "close") == 0) http_fds[fd].keep_alive = 0;
}
if ((buf = akbuf_table_entry_get(http_fds[fd].headers, "Range")) != NULL)
{
range_start = http_parse_range(buf);
} else
{
range_start = 0;
}
if ((buf = akbuf_table_entry_get(http_fds[fd].headers, "Host")) != NULL)
{
host_buf = akbuf_init(ctx, 0);
akbuf_clone(host_buf, buf); akbuf_asciiz(host_buf);
root_dir = akbuf_table_entry_get_str(cfg.vhosts, akbuf_data(host_buf));
if (root_dir == NULL && (i = akbuf_chr(buf, ':')) != -1)
{
akbuf_set_idx(buf, i);
akbuf_asciiz(buf);
root_dir = akbuf_table_entry_get_str(cfg.vhosts, akbuf_data(buf));
}
if (root_dir == NULL) root_dir = cfg.default_root;
host_p = akbuf_data(host_buf);
} else
{
if (http_fds[fd].ver_maj > 0 && (http_fds[fd].ver_maj != 1 || http_fds[fd].ver_min != 0)) SERVE_ERR(HTTP_BAD_REQUEST);
akbuf_asciiz(net_ent->sockbuf);
host_p = akbuf_data(net_ent->sockbuf);
root_dir = cfg.default_root;
}
DEBUGF("host [%s] root [%s]", host_p, root_dir);
http_do_rewrite(http_fds[fd].uri);
akbuf_asciiz(http_fds[fd].uri);
DEBUGF("rewrote => [%s]", akbuf_data(http_fds[fd].uri));
if (http_has_access(net_ent->peerbuf, http_fds[fd].uri) == 0) SERVE_ERR(HTTP_FORBIDDEN_BANNED);
if (http_serve_hook(fd, net_ent) >= 0) { akbuf_free_ctx(ctx); return; }
if (realpath(root_dir, resolved_root) == NULL) SERVE_ERR((errno == EPERM)? HTTP_FORBIDDEN : HTTP_NOT_FOUND);
resolved_root[sizeof(resolved_root) - 1] = 0;
akbuf_strcpy(parsebufs[0], resolved_root);
akbuf_append_buf(parsebufs[0], http_fds[fd].uri);
akbuf_asciiz(parsebufs[0]);
DEBUGF("req path [%s]", akbuf_data(parsebufs[0]));
if (realpath(akbuf_data(parsebufs[0]), resolved_path) == NULL) SERVE_ERR((errno == EPERM)? HTTP_FORBIDDEN : HTTP_NOT_FOUND);
resolved_path[sizeof(resolved_path) - 1] = 0;
DEBUGF("resolved path [%s] root %s", resolved_path, resolved_root);
if (strlen(resolved_path) < strlen(resolved_root) || strncmp(resolved_path, resolved_root, strlen(resolved_root)) != 0) SERVE_ERR(HTTP_NOT_FOUND);
if (stat(resolved_path, &st) != 0) SERVE_ERR((errno == EPERM)? HTTP_FORBIDDEN : HTTP_NOT_FOUND);
if (st.st_mode & S_IFDIR)
{
unsigned int c;
if (akbuf_empty(http_fds[fd].uri)) SERVE_ERR(HTTP_BAD_REQUEST);
if (access(resolved_path, X_OK) != 0) SERVE_ERR((errno == EPERM || errno == EACCES)? HTTP_FORBIDDEN : HTTP_NOT_FOUND);
akbuf_get_byte(http_fds[fd].uri, akbuf_idx(http_fds[fd].uri) - 1, c);
if (c == '/')
{
http_index(fd, net_ent, resolved_path, range_start);
} else
{
http_log_query(fd, net_ent, HTTP_MOVED_PERM);
akbuf_asciiz(http_fds[fd].uri);
buf = akbuf_init(ctx, 0);
akbuf_sprintf(buf,
"<HTML>\r\n"
"<HEAD><TITLE>The document has moved</TITLE></HEAD>\r\n"
"<BODY>New address <A HREF=\"http://%s%s/\">http://%s%s/</a></BODY>\r\n"
"</HTML>\r\n\r\n",
host_p, akbuf_data(http_fds[fd].uri),
host_p, akbuf_data(http_fds[fd].uri));
akbuf_sprintf(net_ent->sendbuf,
"HTTP/1.1 %u Moved permanently\r\n"
"Server: " SERVER_VERSION "\r\n"
"Content-type: text/html\r\n"
"Content-length: %u\r\n"
"Connection: %s\r\n"
"Location: http://%s%s/\r\n"
"\r\n",
HTTP_MOVED_PERM,
akbuf_idx(buf),
(http_fds[fd].keep_alive == 1)? "keep-alive" : "close",
host_p, akbuf_data(http_fds[fd].uri));
akbuf_append_buf(net_ent->sendbuf, buf);
}
net_send(fd);
akbuf_free_ctx(ctx);
return;
}
akbuf_strcpy(parsebufs[0], resolved_path);
akbuf_append_byte(parsebufs[0], '.');
akbuf_append_str(parsebufs[0], GZIP_SUFFIX);
akbuf_asciiz(parsebufs[0]);
if (akbuf_table_entry_get(http_fds[fd].headers, "Accept-Encoding") != NULL && stat(akbuf_data(parsebufs[0]), &st2) == 0 && !(st2.st_mode & S_IFDIR))
{
if (serve_doc_to_fd(fd, net_ent, resolved_path, akbuf_data(parsebufs[0]), range_start, st2.st_size, 1) == -1) SERVE_ERR((errno == EPERM || errno == EACCES)? HTTP_FORBIDDEN : HTTP_NOT_FOUND);
} else
{
if (serve_doc_to_fd(fd, net_ent, resolved_path, resolved_path, range_start, st.st_size, 0) == -1) SERVE_ERR((errno == EPERM || errno == EACCES)? HTTP_FORBIDDEN : HTTP_NOT_FOUND);
}
akbuf_free_ctx(ctx);
}
AKssize_t http_unescape(akbuf *inbuf, akbuf *outbuf)
{
unsigned int rem, i, c, d;
akbuf_ctxh ctx;
akbuf *buf;
ctx = AKbuf_INVALID_CTX;
if (outbuf == NULL)
{
ctx = akbuf_new_ctx();
buf = akbuf_init(ctx, akbuf_idx(inbuf));
} else
{
buf = outbuf;
}
i = 0;
rem = akbuf_idx(inbuf);
while (rem > 0)
{
akbuf_get_byte(inbuf, i, d); i ++; rem --;
if (d == '%' && rem >= 2)
{
akbuf_get_byte(inbuf, i, c); i ++; rem --;
if (c >= 'a') c -= 'a' - 0xa;
else if (c >= 'A') c -= 'A' - 0xa;
else if (c >= '0') c -= '0';
else break;
d = c << 4;
akbuf_get_byte(inbuf, i, c); i ++; rem --;
if (c >= 'a') c -= 'a' - 0xa;
else if (c >= 'A') c -= 'A' - 0xa;
else if (c >= '0') c -= '0';
else break;
d |= c;
if (d > 0xff) break;
}
akbuf_append_byte(buf, d);
}
if (rem > 0) { if (ctx != AKbuf_INVALID_CTX) akbuf_free_ctx(ctx); return -rem; }
if (outbuf == NULL) akbuf_clone(inbuf, buf);
if (ctx != AKbuf_INVALID_CTX) akbuf_free_ctx(ctx);
return i;
}
void http_parse_arg(akbuf *arg, akbuf *var, akbuf *val)
{
int i;
akbuf_set_idx(var, 0);
akbuf_set_idx(val, 0);
if ((i = akbuf_chr(arg, '=')) != -1)
{
akbuf_split(arg, var, i);
akbuf_clone(val, arg);
} else
{
akbuf_clone(var, arg);
}
http_unescape(var, NULL);
http_unescape(val, NULL);
}
void http_parse_args(int fd, net_fd_entry *net_ent, akbuf *args)
{
akbuf_ctxh ctx;
akbuf *splitargs, *splitarg;
akbuf *var, *val;
int i;
ctx = akbuf_new_ctx();
splitargs = akbuf_init(ctx, 0);
splitarg = akbuf_init(ctx, 0);
var = akbuf_init(ctx, 0);
val = akbuf_init(ctx, 0);
akbuf_clone(splitargs, args);
while ((i = akbuf_chr(splitargs, '&')) != -1)
{
akbuf_split(splitargs, splitarg, i);
http_parse_arg(splitarg, var, val);
akbuf_asciiz(var);
#ifdef DEBUG
akbuf_asciiz(val);
DEBUGF("http_parse_args(): var [%s] val [%s]\n", akbuf_data(var), akbuf_data(val));
#endif
akbuf_table_entry_add(http_fds[fd].ctx, http_fds[fd].args, akbuf_data(var), val);
}
if (akbuf_idx(splitargs) > 0)
{
http_parse_arg(splitargs, var, val);
akbuf_asciiz(var);
#ifdef DEBUG
akbuf_asciiz(val);
DEBUGF("http_parse_args(): last var [%s] val [%s]\n", akbuf_data(var), akbuf_data(val));
#endif
akbuf_table_entry_add(http_fds[fd].ctx, http_fds[fd].args, akbuf_data(var), val);
}
akbuf_free_ctx(ctx);
}
void http_handle_action(int fd, net_fd_entry *net_ent, akbuf *linebuf)
{
int i;
unsigned int c;
/* parsebufs: 0 == method, 1 == uri */
#define ACTION_ERR()\
{\
http_error(fd, net_ent, HTTP_BAD_REQUEST);\
return;\
}
DEBUGF("http action");
if ((i = akbuf_chr(linebuf, ' ')) == -1) ACTION_ERR();
akbuf_split(linebuf, parsebufs[0], i);
akbuf_asciiz(parsebufs[0]);
if (strcasecmp(akbuf_data(parsebufs[0]), "GET") == 0) http_fds[fd].method = HTTP_METHOD_GET;
else if (strcasecmp(akbuf_data(parsebufs[0]), "HEAD") == 0) http_fds[fd].method = HTTP_METHOD_HEAD;
else if (strcasecmp(akbuf_data(parsebufs[0]), "POST") == 0) http_fds[fd].method = HTTP_METHOD_POST;
else ACTION_ERR();
if ((i = akbuf_chr(linebuf, ' ')) != -1)
{
unsigned int cur_ver, seen_dot;
akbuf_split(linebuf, parsebufs[1], i);
if ((i = akbuf_chr(linebuf, '/')) == -1) ACTION_ERR();
if (++ i >= akbuf_idx(linebuf)) ACTION_ERR();
cur_ver = seen_dot = 0;
for (; i < akbuf_idx(linebuf); i ++)
{
akbuf_get_byte(linebuf, i, c);
if (c == '.')
{
if (seen_dot == 0) http_fds[fd].ver_maj = cur_ver;
else if (seen_dot == 1) http_fds[fd].ver_min = cur_ver;
seen_dot ++;
cur_ver = 0;
} else
{
if (c > '9' || c < '0') ACTION_ERR();
cur_ver *= 10;
cur_ver += c - '0';
}
}
if (seen_dot == 0) http_fds[fd].ver_maj = cur_ver;
else if (seen_dot == 1) http_fds[fd].ver_min = cur_ver;
} else
{
akbuf_clone(parsebufs[1], linebuf);
http_fds[fd].ver_maj = 0;
http_fds[fd].ver_min = 9;
}
if ((i = akbuf_chr(parsebufs[1], '?')) != -1)
{
if (i == 0) ACTION_ERR();
akbuf_set_data(http_fds[fd].query, akbuf_data(parsebufs[1]) + i + 1, akbuf_idx(parsebufs[1]) - i - 1);
akbuf_set_idx(parsebufs[1], i);
akbuf_asciiz(http_fds[fd].query); akbuf_asciiz(parsebufs[1]);
DEBUGF("got query [%s] rem [%s]", akbuf_data(http_fds[fd].query), akbuf_data(parsebufs[1]));
http_parse_args(fd, net_ent, http_fds[fd].query);
} else
{
akbuf_set_idx(http_fds[fd].query, 0);
}
if (akbuf_empty(parsebufs[1])) ACTION_ERR();
http_unescape(parsebufs[1], http_fds[fd].uri);
if (akbuf_empty(http_fds[fd].uri)) ACTION_ERR();
akbuf_asciiz(http_fds[fd].uri);
DEBUGF("got http version %u.%u", http_fds[fd].ver_maj, http_fds[fd].ver_min);
akbuf_asciiz(net_ent->peerbuf);
aklogf(LOG_DEBUG, "%d: %s HTTP/%u.%u \"%s %s\"", fd, akbuf_data(net_ent->peerbuf), http_fds[fd].ver_maj, http_fds[fd].ver_min, akbuf_data(parsebufs[0]), akbuf_data(http_fds[fd].uri));
if (http_fds[fd].ver_maj > 0) http_fds[fd].state = HTTP_FD_HEADERS; else http_serve_req(fd, net_ent);
}
void http_handle_content(int fd, net_fd_entry *net_ent, akbuf *buf)
{
unsigned int rem;
rem = http_fds[fd].content_len - akbuf_idx(http_fds[fd].content);
akbuf_append_data(http_fds[fd].content, akbuf_data(buf), (akbuf_idx(buf) > rem)? rem : akbuf_idx(buf));
if (akbuf_idx(http_fds[fd].content) >= http_fds[fd].content_len)
{
http_serve_req(fd, net_ent);
return;
}
}
void http_handle_headers(int fd, net_fd_entry *net_ent, akbuf *linebuf)
{
int i;
/* parsebufs: 0 == header name */
#define HEADERS_ERR()\
{\
http_error(fd, net_ent, HTTP_BAD_REQUEST);\
return;\
}
if (akbuf_empty(linebuf) || (i = akbuf_chr(linebuf, ':')) == -1)
{
DEBUGF("content-len %u", http_fds[fd].content_len);
if (http_fds[fd].content_len != 0)
{
http_fds[fd].state = HTTP_FD_CONTENT;
net_set_callbacks(fd, http_handle_content, http_handle_sent);
net_set_type(fd, NET_FD_READ);
} else
{
http_serve_req(fd, net_ent);
}
return;
}
if (http_fds[fd].num_headers >= HTTP_MAX_HEADERS) HEADERS_ERR();
akbuf_split(linebuf, parsebufs[0], i);
for (i = 0; i < akbuf_idx(linebuf); i ++) if (akbuf_data(linebuf)[i] != ' ' && akbuf_data(linebuf)[i] != '\t') break;
akbuf_consume(linebuf, i);
akbuf_asciiz(parsebufs[0]); akbuf_asciiz(linebuf);
DEBUGF("header [%s] : [%s]", akbuf_data(parsebufs[0]), akbuf_data(linebuf));
if (strcasecmp(akbuf_data(parsebufs[0]), "Content-length") == 0)
{
http_fds[fd].content_len = atoi(akbuf_data(linebuf));
if (http_fds[fd].content_len > HTTP_MAX_CONTENT_LEN) HEADERS_ERR();
}
akbuf_table_entry_add(http_fds[fd].ctx, http_fds[fd].headers, akbuf_data(parsebufs[0]), linebuf);
return;
}
void http_handle_action_and_headers(int fd, net_fd_entry *net_ent, akbuf *linebuf)
{
unsigned int i;
for (i = 0; i < sizeof(parsebufs) / sizeof(parsebufs[0]); i ++) if (akbuf_size(parsebufs[i]) > BUF_SIZE) akbuf_set_size(parsebufs[i], BUF_SIZE);
switch (http_fds[fd].state)
{
case HTTP_FD_UNUSED:
case HTTP_FD_NEW_REQ:
http_fds[fd].ctx = net_ent->ctx;
http_fds[fd].state = HTTP_FD_ACTION;
http_fds[fd].method = HTTP_METHOD_NONE;
http_fds[fd].uri = akbuf_init(net_ent->ctx, 0);
http_fds[fd].query = akbuf_init(net_ent->ctx, 0);
http_fds[fd].content = akbuf_init(net_ent->ctx, 0);
http_fds[fd].content_len = 0;
http_fds[fd].ver_maj = http_fds[fd].ver_min = 0;
http_fds[fd].keep_alive = 0;
http_fds[fd].num_headers = 0;
http_fds[fd].headers = akbuf_table_init(net_ent->ctx, AKBUF_TABLE_NOCASE);
http_fds[fd].num_args = 0;
http_fds[fd].args = akbuf_table_init(net_ent->ctx, AKBUF_TABLE_NOCASE);
http_fds[fd].rpipe_fd = -1;
http_fds[fd].rpipe_net_ent = NULL;
http_fds[fd].wpipe_fd = -1;
http_fds[fd].wpipe_net_ent = NULL;
/* fallthrough */
case HTTP_FD_ACTION:
http_handle_action(fd, net_ent, linebuf);
break;
case HTTP_FD_HEADERS:
http_handle_headers(fd, net_ent, linebuf);
break;
}
}
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