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/*******************************************************************************
* libproxy - A library for proxy configuration
* Copyright (C) 2006 Nathaniel McCallum <nathaniel@natemccallum.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#include "../extension_pacrunner.hpp"
using namespace libproxy;
#ifdef __APPLE__
// JavaScriptCore.h requires CoreFoundation
// This is only found on Mac OS X
#include <JavaScriptCore/JavaScriptCore.h>
#else
#include <JavaScriptCore/JavaScript.h>
#endif
#include "pacutils.h"
#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN 16
#endif
#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN 46
#endif
static char *jstr2str(JSStringRef str, bool release) throw (bad_alloc)
{
char *tmp = new char[JSStringGetMaximumUTF8CStringSize(str)+1];
JSStringGetUTF8CString(str, tmp, JSStringGetMaximumUTF8CStringSize(str)+1);
if (release) JSStringRelease(str);
return tmp;
}
static JSValueRef dnsResolve(JSContextRef ctx, JSObjectRef /*func*/, JSObjectRef /*self*/, size_t argc, const JSValueRef argv[], JSValueRef* /*exception*/)
{
if (argc != 1) return NULL;
if (!JSValueIsString(ctx, argv[0])) return NULL;
// Get hostname argument
char *tmp = jstr2str(JSValueToStringCopy(ctx, argv[0], NULL), true);
// Look it up
struct addrinfo *info;
if (getaddrinfo(tmp, NULL, NULL, &info))
return NULL;
delete tmp;
// Try for IPv4
tmp = new char[INET6_ADDRSTRLEN+1];
if (getnameinfo(info->ai_addr, info->ai_addrlen,
tmp, INET6_ADDRSTRLEN+1,
NULL, 0,
NI_NUMERICHOST)) {
freeaddrinfo(info);
delete tmp;
return NULL;
}
freeaddrinfo(info);
// Create the return value
JSStringRef str = JSStringCreateWithUTF8CString(tmp);
JSValueRef ret = JSValueMakeString(ctx, str);
JSStringRelease(str);
delete tmp;
return ret;
}
static JSValueRef myIpAddress(JSContextRef ctx, JSObjectRef func, JSObjectRef self, size_t /*argc*/, const JSValueRef[] /*argv*/, JSValueRef* /*exception*/)
{
char hostname[1024];
if (!gethostname(hostname, 1023)) {
JSStringRef str = JSStringCreateWithUTF8CString(hostname);
JSValueRef val = JSValueMakeString(ctx, str);
JSStringRelease(str);
JSValueRef ip = dnsResolve(ctx, func, self, 1, &val, NULL);
return ip;
}
return NULL;
}
class webkit_pacrunner : public pacrunner {
public:
~webkit_pacrunner() {
JSGarbageCollect(this->jsctx);
JSGlobalContextRelease(this->jsctx);
}
webkit_pacrunner(string pac, const url& pacurl) throw (bad_alloc) : pacrunner(pac, pacurl) {
JSStringRef str = NULL;
JSObjectRef func = NULL;
// Create the basic context
if (!(this->jsctx = JSGlobalContextCreate(NULL))) goto error;
// Add dnsResolve into the context
str = JSStringCreateWithUTF8CString("dnsResolve");
func = JSObjectMakeFunctionWithCallback(this->jsctx, str, dnsResolve);
JSObjectSetProperty(this->jsctx, JSContextGetGlobalObject(this->jsctx), str, func, kJSPropertyAttributeNone, NULL);
JSStringRelease(str);
// Add myIpAddress into the context
str = JSStringCreateWithUTF8CString("myIpAddress");
func = JSObjectMakeFunctionWithCallback(this->jsctx, str, myIpAddress);
JSObjectSetProperty(this->jsctx, JSContextGetGlobalObject(this->jsctx), str, func, kJSPropertyAttributeNone, NULL);
JSStringRelease(str);
// Add all other routines into the context
str = JSStringCreateWithUTF8CString(JAVASCRIPT_ROUTINES);
if (!JSCheckScriptSyntax(this->jsctx, str, NULL, 0, NULL)) goto error;
JSEvaluateScript(this->jsctx, str, NULL, NULL, 1, NULL);
JSStringRelease(str);
// Add the PAC into the context
str = JSStringCreateWithUTF8CString(pac.c_str());
if (!JSCheckScriptSyntax(this->jsctx, str, NULL, 0, NULL)) goto error;
JSEvaluateScript(this->jsctx, str, NULL, NULL, 1, NULL);
JSStringRelease(str);
return;
error:
if (str) JSStringRelease(str);
if (this->jsctx) {
JSGarbageCollect(this->jsctx);
JSGlobalContextRelease(this->jsctx);
}
throw bad_alloc();
}
string run(const url& url_) throw (bad_alloc) {
JSStringRef str = NULL;
JSValueRef val = NULL;
string tmp;
// Run the PAC
tmp = string("FindProxyForURL(\"") + url_.to_string() + string("\", \"") + url_.get_host() + "\");";
str = JSStringCreateWithUTF8CString(tmp.c_str());
if (!str) throw bad_alloc();
if (!JSCheckScriptSyntax(this->jsctx, str, NULL, 0, NULL)) goto error;
if (!(val = JSEvaluateScript(this->jsctx, str, NULL, NULL, 1, NULL))) goto error;
if (!JSValueIsString(this->jsctx, val)) goto error;
JSStringRelease(str);
// Convert the return value to a string
return jstr2str(JSValueToStringCopy(this->jsctx, val, NULL), true);
error:
JSStringRelease(str);
return "";
}
private:
JSGlobalContextRef jsctx;
};
PX_PACRUNNER_MODULE_EZ(webkit, "JSObjectMakeFunctionWithCallback", "webkit");
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