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/*
* Copyright (C) 2016 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <cstring>
#include <glibmm.h>
#include "pbd/compose.h"
#include "pbd/i18n.h"
#include "pbd/error.h"
#include "ardour_http.h"
#ifdef WAF_BUILD
#include "gtk2ardour-version.h"
#endif
#ifndef ARDOUR_CURL_TIMEOUT
#define ARDOUR_CURL_TIMEOUT (60)
#endif
using namespace ArdourCurl;
const char* HttpGet::ca_path = NULL;
const char* HttpGet::ca_info = NULL;
void
HttpGet::setup_certificate_paths ()
{
/* this is only needed for Linux Bundles.
* (on OSX, Windows, we use system-wide ssl (darwinssl, winssl)
* Gnu/Linux distro will link against system-wide libcurl.
*
* but for linux-bundles we get to enjoy:
* https://www.happyassassin.net/2015/01/12/a-note-about-ssltls-trusted-certificate-stores-and-platforms/
*
* (we do ship curl + nss + nss-pem)
*
* Short of this mess: we could simply bundle a .crt of
* COMODO (ardour) and ghandi (freesound) and be done with it.
*/
assert (!ca_path && !ca_info); // call once
curl_global_init (CURL_GLOBAL_DEFAULT);
if (Glib::file_test ("/etc/pki/tls/certs/ca-bundle.crt", Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_REGULAR)) {
// Fedora / RHEL, Arch
ca_info = "/etc/pki/tls/certs/ca-bundle.crt";
}
else if (Glib::file_test ("/etc/ssl/certs/ca-certificates.crt", Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_REGULAR)) {
// Debian and derivatives
ca_info = "/etc/ssl/certs/ca-certificates.crt";
}
else if (Glib::file_test ("/etc/pki/tls/cert.pem", Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_REGULAR)) {
// GNU/TLS can keep extra stuff here
ca_info = "/etc/pki/tls/cert.pem";
}
// else NULL: use default (currently) "/etc/ssl/certs/ca-certificates.crt" if it exists
if (Glib::file_test ("/etc/pki/tls/certs/ca-bundle.crt", Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_DIR)) {
// we're on RHEL // https://bugzilla.redhat.com/show_bug.cgi?id=1053882
ca_path = "/nonexistent_path"; // don't try "/etc/ssl/certs" in case it's curl's default
}
else if (Glib::file_test ("/etc/ssl/certs", Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_DIR)) {
// Debian and derivs + OpenSuSe
ca_path = "/etc/ssl/certs";
} else {
ca_path = "/nonexistent_path"; // don't try -- just in case:
}
/* If we don't set anything defaults are used. at the time of writing we compile bundled curl on debian
* and it'll default to /etc/ssl/certs and /etc/ssl/certs/ca-certificates.crt
*/
}
static size_t
WriteMemoryCallback (void *ptr, size_t size, size_t nmemb, void *data) {
size_t realsize = size * nmemb;
struct HttpGet::MemStruct *mem = (struct HttpGet::MemStruct*)data;
mem->data = (char *)realloc (mem->data, mem->size + realsize + 1);
if (mem->data) {
memcpy (&(mem->data[mem->size]), ptr, realsize);
mem->size += realsize;
mem->data[mem->size] = 0;
}
return realsize;
}
static size_t headerCallback (char* ptr, size_t size, size_t nmemb, void* data)
{
size_t realsize = size * nmemb;
struct HttpGet::HeaderInfo *nfo = (struct HttpGet::HeaderInfo*)data;
std::string header (static_cast<const char*>(ptr), realsize);
std::string::size_type index = header.find (':', 0);
if (index != std::string::npos) {
std::string k = header.substr (0, index);
std::string v = header.substr (index + 2);
k.erase(k.find_last_not_of (" \n\r\t")+1);
v.erase(v.find_last_not_of (" \n\r\t")+1);
nfo->h[k] = v;
}
return realsize;
}
HttpGet::HttpGet (bool p, bool ssl)
: persist (p)
, _status (-1)
, _result (-1)
{
error_buffer[0] = '\0';
_curl = curl_easy_init ();
curl_easy_setopt (_curl, CURLOPT_WRITEDATA, (void *)&mem);
curl_easy_setopt (_curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt (_curl, CURLOPT_HEADERDATA, (void *)&nfo);
curl_easy_setopt (_curl, CURLOPT_HEADERFUNCTION, headerCallback);
curl_easy_setopt (_curl, CURLOPT_USERAGENT, PROGRAM_NAME VERSIONSTRING);
curl_easy_setopt (_curl, CURLOPT_TIMEOUT, ARDOUR_CURL_TIMEOUT);
curl_easy_setopt (_curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt (_curl, CURLOPT_ERRORBUFFER, error_buffer);
// by default use curl's default.
if (ssl && ca_info) {
curl_easy_setopt (_curl, CURLOPT_CAINFO, ca_info);
}
if (ssl && ca_path) {
curl_easy_setopt (_curl, CURLOPT_CAPATH, ca_path);
}
}
HttpGet::~HttpGet ()
{
curl_easy_cleanup (_curl);
if (!persist) {
free (mem.data);
}
}
char*
HttpGet::get (const char* url)
{
_status = _result = -1;
if (!_curl || !url) {
return NULL;
}
if (strncmp ("http://", url, 7) && strncmp ("https://", url, 8)) {
return NULL;
}
if (!persist) {
free (mem.data);
} // otherwise caller is expected to have free()d or re-used it.
mem.data = NULL;
mem.size = 0;
curl_easy_setopt (_curl, CURLOPT_URL, url);
_result = curl_easy_perform (_curl);
curl_easy_getinfo (_curl, CURLINFO_RESPONSE_CODE, &_status);
if (_result) {
PBD::error << string_compose (_("HTTP request failed: (%1) %2"), _result, error_buffer);
return NULL;
}
if (_status != 200) {
PBD::error << string_compose (_("HTTP request status: %1"), _status);
return NULL;
}
return mem.data;
}
std::string
HttpGet::error () const {
if (_result != 0) {
return string_compose (_("HTTP request failed: (%1) %2"), _result, error_buffer);
}
if (_status != 200) {
return string_compose (_("HTTP request status: %1"), _status);
}
return "No Error";
}
char*
ArdourCurl::http_get (const char* url, int* status) {
HttpGet h (true);
char* rv = h.get (url);
if (status) {
*status = h.status ();
}
return rv;
}
std::string
ArdourCurl::http_get (const std::string& url) {
return HttpGet (false).get (url);
}
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