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http_request.c
348 lines (241 loc) · 9.29 KB
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http_request.c
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/**
* @author Gar|k <garik.djan@gmail.com>
* @copyright (c) 2016, http://c0dedgarik.blogspot.ru/
* @version 0.1
*
*/
#include "main.h"
static const char http_get[] = "GET %s HTTP/1.1\r\n\
Host: %s\r\n\
Connection: close\r\n\
Accept: text/plain,text/html;q=0.9\r\n\
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36\r\n\
\r\n";
static const char search_path[][256] = {"/includes/init.php", "/modules/clauses/clauses.sitemap.php?start=1", "/plugins/kcaptcha/kcaptcha.php?kcaptcha=1"};
static void
follow_location(domain_t * domain, const char *location, size_t len);
static void
timeout_handler(struct ev_loop *loop, struct ev_timer *watcher, int events) {
// connection timeout occurred: close the associated socket and bail
domain_t * domain = (domain_t *) (((char *) watcher) - offsetof(domain_t, tw)); // C magic
debug("- timeout_handler %s", domain->domain);
ev_io_stop(loop, &domain->io);
ev_io_set(&domain->io, -1, 0);
free_domain(domain);
errno = ETIMEDOUT;
}
static void
success_checked(const domain_t *domain) {
char buffer[MAXLINE];
size_t len;
debug("%s FOUND\n", domain->domain);
__sync_fetch_and_add(&domain->options->counters.found, 1);
len = snprintf(buffer, sizeof (buffer),
"%s%s;\n", domain->domain, search_path[domain->index_search]);
writen(domain->options->file.out, buffer, len);
}
static void
error_parse(const domain_t *domain) {
//char buffer[MAXLINE];
//size_t len;
debug("error_parse %s", domain->domain);
/*len = snprintf(buffer, sizeof (buffer),
"%s;\n", domain->domain);
writen(domain->options->file.parse, buffer, len);*/
}
static int
parse_response(domain_t *domain) {
int pret = -1, minor_version, status;
size_t msg_len, buflen = domain->data.len, prevbuflen = 0, num_headers;
const char *msg;
num_headers = sizeof (domain->http.headers) / sizeof (domain->http.headers[0]);
while (1) {
pret = phr_parse_response(domain->data.buffer, buflen, &minor_version, &status, &msg, &msg_len, domain->http.headers, &num_headers, prevbuflen);
domain->http.num_headers = num_headers;
domain->http.status = status;
if (pret > 0)
break;
else if (pret == -1) { // ParseError;
break;
}
assert(pret == -2);
if (buflen == sizeof (domain->data.buffer)) { // RequestIsTooLongError
break;
}
}
return pret;
}
static bool
parse_body(const char *buf, size_t len) {
bool status = false;
if (NULL != memmem(buf, len, "diafan", 6) || NULL != memmem(buf, len, "DIAFAN", 6)) {
status = true;
}
return status;
}
static void
recv_handler(struct ev_loop *loop, struct ev_io *watcher, int events) {
//debug("recv_handler");
size_t i;
domain_t *domain = (domain_t *) watcher;
ev_io_stop(loop, &domain->io);
ev_timer_stop(loop, &domain->tw);
//debug("recv_header %s -- data buffer:%p; data len: %d", domain->domain, domain->data.buffer + domain->data.len, domain->data.len);
ssize_t len = readn(domain->io.fd, domain->data.buffer + domain->data.len, sizeof (domain->data.buffer) - domain->data.len);
if (len <= 0) {
if (EAGAIN == errno) { // сокет занят буфер кончился и прочее
//err_ret("error read socket %s: ", domain->domain);
ev_io_start(loop, &domain->io);
ev_timer_start(loop, &domain->tw);
return;
} else { // жесткая ошибка
err_ret("error read socket %s: ", domain->domain);
free_domain(domain);
return;
}
} else {
domain->data.len += len;
int pret = parse_response(domain);
debug("parse_response %s:%d", domain->domain, pret);
if (pret > 0) {
switch (domain->http.status) {
case 301:
case 302:
{
for (i = 0; i != domain->http.num_headers; ++i) {
if (NULL != memmem(domain->http.headers[i].name, domain->http.headers[i].name_len, "Location", 8)) {
follow_location(domain, domain->http.headers[i].value, domain->http.headers[i].value_len);
return;
//break;
}
}
break;
}
case 200:
{
if (true == parse_body(&domain->data.buffer[pret], domain->data.len - pret)) {
success_checked(domain);
} else {
if (++domain->index_search < (sizeof (search_path) / sizeof (search_path[0]))) {
//ares_gethostbyname(domain->options->ares.channel, domain->domain, AF_INET, ev_ares_dns_callback, (void *) domain);
http_request(domain);
return;
}
}
break;
}
}
} else {
error_parse(domain);
}
}
debug("-- %s %d checked", domain->domain, domain->http.status);
free_domain(domain);
}
static void
send_request(struct ev_loop *loop, domain_t * domain) {
debug("send_request %s, search = %s", domain->domain, search_path[domain->index_search]);
char buf[MAXLINE];
ev_io_set(&domain->io, domain->io.fd, EV_READ);
ev_set_cb(&domain->io, recv_handler);
ev_timer_set(&domain->tw, MAXRECVTIME, 0);
size_t len = snprintf(buf, sizeof (buf), http_get, search_path[domain->index_search], domain->domain); /* this is safe */
if (len == writen(domain->io.fd, buf, len)) {
//bzero(domain->data.buffer, sizeof(domain->data.buffer));
domain->data.len = 0;
ev_io_start(loop, &domain->io);
ev_timer_start(loop, &domain->tw);
} else {
free_domain(domain);
}
}
static void
connect_handler(struct ev_loop *loop, struct ev_io *watcher, int events) {
domain_t * domain = (domain_t *) watcher;
ev_io_stop(loop, &domain->io);
ev_timer_stop(loop, &domain->tw);
debug("-- connected %s", domain->domain);
int error;
socklen_t len = sizeof (error);
if (getsockopt(domain->io.fd, SOL_SOCKET, SO_ERROR, &error, &len) < 0 || error) {
free_domain(domain);
errno = error;
} else {
send_request(loop, domain);
}
}
int
http_request(domain_t * domain) {
int sockfd = Socket(AF_INET, SOCK_STREAM, 0);
int n;
int flags = Fcntl(sockfd, F_GETFL, 0);
Fcntl(sockfd, F_SETFL, flags | O_NONBLOCK);
ev_io_init(&domain->io, connect_handler, sockfd, EV_WRITE);
ev_io_start(domain->options->loop, &domain->io);
ev_timer_init(&domain->tw, timeout_handler, MAXCONTIME, 0);
ev_timer_start(domain->options->loop, &domain->tw);
if ((n = connect(sockfd, (struct sockaddr *) &domain->servaddr, sizeof (domain->servaddr))) < 0)
if (errno != EINPROGRESS)
return (-1);
return 0;
}
static bool
is_valid_location(const domain_t *domain, const char *location, size_t len) {
// "http://1000heads.comhttp://1000HEADS.RU/includes/init.php"
bool valid = false;
char buffer[MAXLINE];
size_t s = 0;
if (NULL != location) {
if (len > 0 && location[len - 1] != '/' && NULL != memmem(location, len, ".php", 4)) {
//debug("-- follow location %.*s", 1, &location[len-1]);
char *p = NULL;
if (NULL != (p = memmem(location, len, "http://", 7))) {
p = p + 7;
if (NULL == memmem(p, len - (p - location), "http://", 7)) {
if (NULL == memmem(p, len - (p - location), "http/", 5)) {
if (NULL == memmem(p, len - (p - location), ".html", 5)) {
valid = true;
}
}
}
}
if (true == valid) {
valid = false;
size_t i = 0;
for (i = 0; i < sizeof (search_path) / sizeof (search_path[0]); i++) {
s = snprintf(buffer, sizeof (buffer),
"%s%s", domain->domain, search_path[i]);
//debug("-- %s --", buffer[s-1]);
if (NULL != memmem(location, len, buffer, s) && location[len - 1] == buffer[s - 1]) {
valid = true;
break;
}
}
}
}
}
if (false == valid) {
debug("- invalid location");
}
return valid;
}
static void
follow_location(domain_t * domain, const char *location, size_t len) {
debug("-- follow location %.*s", (int) len, location);
__sync_fetch_and_add(&domain->options->counters.follow, 1);
char *host;
char c;
size_t host_len;
if (phr_parse_host(location, len, (const char **)&host, &host_len) > 0) {
free(domain->domain);
c = host[host_len];
host[host_len] = 0;
domain->domain = strdup(host);
host[host_len] = c;
if (false == is_valid_location(domain, location, len)) {
free_domain(domain);
return;
}
http_request(domain);
}
}