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我正在編寫一個小應用程序來測試和理解PNaCl。解析主機時，便攜本機客戶端權限被拒絕
該應用程序的目標是使用PNaCl框架中的HostResolver類來解析主機的IP地址。該代碼似乎正常工作，但我得到一個訪問被拒絕的錯誤（返回值-7），因爲我沒有要求訪問套接字層的權限（我猜）給用戶。問題是我不知道如何去做。我編寫了一個清單文件，但沒有發生任何事情。
注意：此應用程序必須在打開的Web上運行，並且不得要求任何安裝過程。 我不想寫一個Chrome應用程序。
我還沒有找到任何線索，所以我將不勝感激您的幫助。
hello_tuttorial.cc：
#include <stdio.h>
#include <string.h>
#include <sstream>
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/var.h"
#include "ppapi/cpp/tcp_socket.h"
#include "ppapi/cpp/host_resolver.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/tcp_socket.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/utility/completion_callback_factory.h"
namespace {
// exptected string from the browser
const char * const kHelloString = "hello";
// the sting sent from the nacl module to the browser
const char * const kReplyString ="hello from the PNaCl";
}
class HelloTutorialInstance : public pp::Instance {
pp::CompletionCallbackFactory<HelloTutorialInstance> callback_factory_;
pp::TCPSocket tcp_socket_;
pp::HostResolver resolver_;
public:
explicit HelloTutorialInstance(PP_Instance instance) : pp::Instance(instance),
callback_factory_(this)
{}
virtual ~HelloTutorialInstance() {}
virtual void HandleMessage(const pp::Var& var_message) {
if (!var_message.is_string())
return;
std::string message = var_message.AsString();
pp::Var var_reply;
test_socket_support();
if(message == kHelloString){
var_reply = pp::Var("So far so good");
PostMessage(var_reply);
}
}
private:
void test_socket_support(){
if (!pp::TCPSocket::IsAvailable()) {
PostMessage("TCPSocket not available");
return;
}
tcp_socket_ = pp::TCPSocket(this);
if (tcp_socket_.is_null()) {
PostMessage("Error creating TCPSocket.");
return;
}
if (!pp::HostResolver::IsAvailable()) {
PostMessage("HostResolver not available");
return;
}
resolver_ = pp::HostResolver(this);
if (resolver_.is_null()) {
PostMessage("Error creating HostResolver.");
return;
}
int port = 80;
pp::CompletionCallback callback = \
callback_factory_.NewCallback(&HelloTutorialInstance::OnResolveCompletion);
PP_HostResolver_Hint hint = { PP_NETADDRESS_FAMILY_UNSPECIFIED, 0 };
resolver_.Resolve("http://www.google.com", port, hint, callback);
PostMessage("Resolving ...");
}
void OnResolveCompletion(int32_t result) {
if (result != PP_OK) {
char str[100] = {0};
sprintf(str, "Resolved failed %d", result);
PostMessage(str);
if(result == PP_ERROR_NOACCESS)
PostMessage("Access denied");
return;
}
pp::NetAddress addr = resolver_.GetNetAddress(0);
PostMessage(std::string("Resolved: ") +
addr.DescribeAsString(true).AsString());
}
};
class HelloTutorialModule : public pp::Module {
public:
HelloTutorialModule() : pp::Module() {}
virtual ~HelloTutorialModule() {}
virtual pp::Instance* CreateInstance(PP_Instance instance) {
return new HelloTutorialInstance(instance);
}
};
namespace pp {
Module* CreateModule() {
return new HelloTutorialModule();
}
} // namespace pp
的manifest.json：
{
"name": "hello_tutorial",
"version": "31.0.1650.57",
"manifest_version": 2,
"description": "socket Example",
"offline_enabled": true,
"permissions": [
{
"socket": [
"tcp-listen:*:*",
"tcp-connect",
"resolve-host",
"udp-bind:*:*",
"udp-send-to:*:*"
]
}
]
}
的index.html：
<div id="listener">
<script type="text/javascript">
var listener = document.getElementById('listener');
listener.addEventListener('load', moduleDidLoad, true);
listener.addEventListener('message', handleMessage, true);
</script>
<embed id="hello_tutorial"
width=0 height=0
src="hello_tutorial.nmf"
type="application/x-pnacl" />
</div>
輸出：
Resolving ...
So far so good
Resolved failed -7
Access denied