blob: 365234f76a69fd7e86d92e865355bbce99813e02 [file] [log] [blame]
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include <cstdio>
#include "net/proxy/proxy_resolver_v8.h"
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/string_tokenizer.h"
#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "googleurl/src/gurl.h"
#include "googleurl/src/url_canon.h"
#include "net/base/host_cache.h"
#include "net/base/net_errors.h"
#include "net/base/net_log.h"
#include "net/base/net_util.h"
#include "net/proxy/proxy_info.h"
#include "net/proxy/proxy_resolver_js_bindings.h"
#include "net/proxy/proxy_resolver_request_context.h"
#include "net/proxy/proxy_resolver_script.h"
#include "v8/include/v8.h"
// Notes on the javascript environment:
//
// For the majority of the PAC utility functions, we use the same code
// as Firefox. See the javascript library that proxy_resolver_scipt.h
// pulls in.
//
// In addition, we implement a subset of Microsoft's extensions to PAC.
// - myIpAddressEx()
// - dnsResolveEx()
// - isResolvableEx()
// - isInNetEx()
// - sortIpAddressList()
//
// It is worth noting that the original PAC specification does not describe
// the return values on failure. Consequently, there are compatibility
// differences between browsers on what to return on failure, which are
// illustrated below:
//
// --------------------+-------------+-------------------+--------------
// | Firefox3 | InternetExplorer8 | --> Us <---
// --------------------+-------------+-------------------+--------------
// myIpAddress() | "127.0.0.1" | ??? | "127.0.0.1"
// dnsResolve() | null | false | null
// myIpAddressEx() | N/A | "" | ""
// sortIpAddressList() | N/A | false | false
// dnsResolveEx() | N/A | "" | ""
// isInNetEx() | N/A | false | false
// --------------------+-------------+-------------------+--------------
//
// TODO(eroman): The cell above reading ??? means I didn't test it.
//
// Another difference is in how dnsResolve() and myIpAddress() are
// implemented -- whether they should restrict to IPv4 results, or
// include both IPv4 and IPv6. The following table illustrates the
// differences:
//
// --------------------+-------------+-------------------+--------------
// | Firefox3 | InternetExplorer8 | --> Us <---
// --------------------+-------------+-------------------+--------------
// myIpAddress() | IPv4/IPv6 | IPv4 | IPv4
// dnsResolve() | IPv4/IPv6 | IPv4 | IPv4
// isResolvable() | IPv4/IPv6 | IPv4 | IPv4
// myIpAddressEx() | N/A | IPv4/IPv6 | IPv4/IPv6
// dnsResolveEx() | N/A | IPv4/IPv6 | IPv4/IPv6
// sortIpAddressList() | N/A | IPv4/IPv6 | IPv4/IPv6
// isResolvableEx() | N/A | IPv4/IPv6 | IPv4/IPv6
// isInNetEx() | N/A | IPv4/IPv6 | IPv4/IPv6
// -----------------+-------------+-------------------+--------------
namespace net {
namespace {
// Pseudo-name for the PAC script.
const char kPacResourceName[] = "proxy-pac-script.js";
// Pseudo-name for the PAC utility script.
const char kPacUtilityResourceName[] = "proxy-pac-utility-script.js";
// External string wrapper so V8 can access the UTF16 string wrapped by
// ProxyResolverScriptData.
class V8ExternalStringFromScriptData
: public v8::String::ExternalStringResource {
public:
explicit V8ExternalStringFromScriptData(
const scoped_refptr<ProxyResolverScriptData>& script_data)
: script_data_(script_data) {}
virtual const uint16_t* data() const OVERRIDE {
return reinterpret_cast<const uint16*>(script_data_->utf16().data());
}
virtual size_t length() const OVERRIDE {
return script_data_->utf16().size();
}
private:
const scoped_refptr<ProxyResolverScriptData> script_data_;
DISALLOW_COPY_AND_ASSIGN(V8ExternalStringFromScriptData);
};
// External string wrapper so V8 can access a string literal.
class V8ExternalASCIILiteral : public v8::String::ExternalAsciiStringResource {
public:
// |ascii| must be a NULL-terminated C string, and must remain valid
// throughout this object's lifetime.
V8ExternalASCIILiteral(const char* ascii, size_t length)
: ascii_(ascii), length_(length) {
DCHECK(IsStringASCII(ascii));
}
virtual const char* data() const OVERRIDE {
return ascii_;
}
virtual size_t length() const OVERRIDE {
return length_;
}
private:
const char* ascii_;
size_t length_;
DISALLOW_COPY_AND_ASSIGN(V8ExternalASCIILiteral);
};
// When creating a v8::String from a C++ string we have two choices: create
// a copy, or create a wrapper that shares the same underlying storage.
// For small strings it is better to just make a copy, whereas for large
// strings there are savings by sharing the storage. This number identifies
// the cutoff length for when to start wrapping rather than creating copies.
const size_t kMaxStringBytesForCopy = 256;
// Converts a V8 String to a UTF8 std::string.
std::string V8StringToUTF8(v8::Handle<v8::String> s) {
std::string result;
s->WriteUtf8(WriteInto(&result, s->Length() + 1));
return result;
}
// Converts a V8 String to a UTF16 string16.
string16 V8StringToUTF16(v8::Handle<v8::String> s) {
int len = s->Length();
string16 result;
// Note that the reinterpret cast is because on Windows string16 is an alias
// to wstring, and hence has character type wchar_t not uint16_t.
s->Write(reinterpret_cast<uint16_t*>(WriteInto(&result, len + 1)), 0, len);
return result;
}
// Converts an ASCII std::string to a V8 string.
v8::Local<v8::String> ASCIIStringToV8String(const std::string& s) {
DCHECK(IsStringASCII(s));
return v8::String::New(s.data(), s.size());
}
// Converts a UTF16 string16 (warpped by a ProxyResolverScriptData) to a
// V8 string.
v8::Local<v8::String> ScriptDataToV8String(
const scoped_refptr<ProxyResolverScriptData>& s) {
if (s->utf16().size() * 2 <= kMaxStringBytesForCopy) {
return v8::String::New(
reinterpret_cast<const uint16_t*>(s->utf16().data()),
s->utf16().size());
}
return v8::String::NewExternal(new V8ExternalStringFromScriptData(s));
}
// Converts an ASCII string literal to a V8 string.
v8::Local<v8::String> ASCIILiteralToV8String(const char* ascii) {
DCHECK(IsStringASCII(ascii));
size_t length = strlen(ascii);
if (length <= kMaxStringBytesForCopy)
return v8::String::New(ascii, length);
return v8::String::NewExternal(new V8ExternalASCIILiteral(ascii, length));
}
// Stringizes a V8 object by calling its toString() method. Returns true
// on success. This may fail if the toString() throws an exception.
bool V8ObjectToUTF16String(v8::Handle<v8::Value> object,
string16* utf16_result) {
if (object.IsEmpty())
return false;
v8::HandleScope scope;
v8::Local<v8::String> str_object = object->ToString();
if (str_object.IsEmpty())
return false;
*utf16_result = V8StringToUTF16(str_object);
return true;
}
// Extracts an hostname argument from |args|. On success returns true
// and fills |*hostname| with the result.
bool GetHostnameArgument(const v8::Arguments& args, std::string* hostname) {
// The first argument should be a string.
if (args.Length() == 0 || args[0].IsEmpty() || !args[0]->IsString())
return false;
const string16 hostname_utf16 = V8StringToUTF16(args[0]->ToString());
// If the hostname is already in ASCII, simply return it as is.
if (IsStringASCII(hostname_utf16)) {
*hostname = UTF16ToASCII(hostname_utf16);
return true;
}
// Otherwise try to convert it from IDN to punycode.
const int kInitialBufferSize = 256;
url_canon::RawCanonOutputT<char16, kInitialBufferSize> punycode_output;
if (!url_canon::IDNToASCII(hostname_utf16.data(),
hostname_utf16.length(),
&punycode_output)) {
return false;
}
// |punycode_output| should now be ASCII; convert it to a std::string.
// (We could use UTF16ToASCII() instead, but that requires an extra string
// copy. Since ASCII is a subset of UTF8 the following is equivalent).
bool success = UTF16ToUTF8(punycode_output.data(),
punycode_output.length(),
hostname);
DCHECK(success);
DCHECK(IsStringASCII(*hostname));
return success;
}
// Wrapper for passing around IP address strings and IPAddressNumber objects.
struct IPAddress {
IPAddress(const std::string& ip_string, const IPAddressNumber& ip_number)
: string_value(ip_string),
ip_address_number(ip_number) {
}
// Used for sorting IP addresses in ascending order in SortIpAddressList().
// IP6 addresses are placed ahead of IPv4 addresses.
bool operator<(const IPAddress& rhs) const {
const IPAddressNumber& ip1 = this->ip_address_number;
const IPAddressNumber& ip2 = rhs.ip_address_number;
if (ip1.size() != ip2.size())
return ip1.size() > ip2.size(); // IPv6 before IPv4.
DCHECK(ip1.size() == ip2.size());
return memcmp(&ip1[0], &ip2[0], ip1.size()) < 0; // Ascending order.
}
std::string string_value;
IPAddressNumber ip_address_number;
};
// Handler for "sortIpAddressList(IpAddressList)". |ip_address_list| is a
// semi-colon delimited string containing IP addresses.
// |sorted_ip_address_list| is the resulting list of sorted semi-colon delimited
// IP addresses or an empty string if unable to sort the IP address list.
// Returns 'true' if the sorting was successful, and 'false' if the input was an
// empty string, a string of separators (";" in this case), or if any of the IP
// addresses in the input list failed to parse.
bool SortIpAddressList(const std::string& ip_address_list,
std::string* sorted_ip_address_list) {
sorted_ip_address_list->clear();
// Strip all whitespace (mimics IE behavior).
std::string cleaned_ip_address_list;
RemoveChars(ip_address_list, " \t", &cleaned_ip_address_list);
if (cleaned_ip_address_list.empty())
return false;
// Split-up IP addresses and store them in a vector.
std::vector<IPAddress> ip_vector;
IPAddressNumber ip_num;
StringTokenizer str_tok(cleaned_ip_address_list, ";");
while (str_tok.GetNext()) {
if (!ParseIPLiteralToNumber(str_tok.token(), &ip_num))
return false;
ip_vector.push_back(IPAddress(str_tok.token(), ip_num));
}
if (ip_vector.empty()) // Can happen if we have something like
return false; // sortIpAddressList(";") or sortIpAddressList("; ;")
DCHECK(!ip_vector.empty());
// Sort lists according to ascending numeric value.
if (ip_vector.size() > 1)
std::stable_sort(ip_vector.begin(), ip_vector.end());
// Return a semi-colon delimited list of sorted addresses (IPv6 followed by
// IPv4).
for (size_t i = 0; i < ip_vector.size(); ++i) {
if (i > 0)
*sorted_ip_address_list += ";";
*sorted_ip_address_list += ip_vector[i].string_value;
}
return true;
}
// Handler for "isInNetEx(ip_address, ip_prefix)". |ip_address| is a string
// containing an IPv4/IPv6 address, and |ip_prefix| is a string containg a
// slash-delimited IP prefix with the top 'n' bits specified in the bit
// field. This returns 'true' if the address is in the same subnet, and
// 'false' otherwise. Also returns 'false' if the prefix is in an incorrect
// format, or if an address and prefix of different types are used (e.g. IPv6
// address and IPv4 prefix).
bool IsInNetEx(const std::string& ip_address, const std::string& ip_prefix) {
IPAddressNumber address;
if (!ParseIPLiteralToNumber(ip_address, &address))
return false;
IPAddressNumber prefix;
size_t prefix_length_in_bits;
if (!ParseCIDRBlock(ip_prefix, &prefix, &prefix_length_in_bits))
return false;
// Both |address| and |prefix| must be of the same type (IPv4 or IPv6).
if (address.size() != prefix.size())
return false;
DCHECK((address.size() == 4 && prefix.size() == 4) ||
(address.size() == 16 && prefix.size() == 16));
return IPNumberMatchesPrefix(address, prefix, prefix_length_in_bits);
}
} // namespace
// ProxyResolverV8::Context ---------------------------------------------------
class ProxyResolverV8::Context {
public:
explicit Context(ProxyResolverJSBindings* js_bindings)
: js_bindings_(js_bindings) {
DCHECK(js_bindings != NULL);
}
~Context() {
v8::Locker locked;
v8_this_.Dispose();
v8_context_.Dispose();
// Run the V8 garbage collector. We do this to be sure the
// ExternalStringResource objects we allocated get properly disposed.
// Otherwise when running the unit-tests they may get leaked.
// See crbug.com/48145.
PurgeMemory();
}
int ResolveProxy(const GURL& query_url, ProxyInfo* results) {
v8::Locker locked;
v8::HandleScope scope;
v8::Context::Scope function_scope(v8_context_);
v8::Local<v8::Value> function;
if (!GetFindProxyForURL(&function)) {
js_bindings_->OnError(
-1, ASCIIToUTF16("FindProxyForURL() is undefined."));
return ERR_PAC_SCRIPT_FAILED;
}
v8::Handle<v8::Value> argv[] = {
ASCIIStringToV8String(query_url.spec()),
ASCIIStringToV8String(query_url.host()),
};
v8::TryCatch try_catch;
v8::Local<v8::Value> ret = v8::Function::Cast(*function)->Call(
v8_context_->Global(), arraysize(argv), argv);
if (try_catch.HasCaught()) {
HandleError(try_catch.Message());
return ERR_PAC_SCRIPT_FAILED;
}
if (!ret->IsString()) {
js_bindings_->OnError(
-1, ASCIIToUTF16("FindProxyForURL() did not return a string."));
return ERR_PAC_SCRIPT_FAILED;
}
string16 ret_str = V8StringToUTF16(ret->ToString());
if (!IsStringASCII(ret_str)) {
// TODO(eroman): Rather than failing when a wide string is returned, we
// could extend the parsing to handle IDNA hostnames by
// converting them to ASCII punycode.
// crbug.com/47234
string16 error_message =
ASCIIToUTF16("FindProxyForURL() returned a non-ASCII string "
"(crbug.com/47234): ") + ret_str;
js_bindings_->OnError(-1, error_message);
return ERR_PAC_SCRIPT_FAILED;
}
results->UsePacString(UTF16ToASCII(ret_str));
return OK;
}
int InitV8(const scoped_refptr<ProxyResolverScriptData>& pac_script) {
v8::Locker locked;
v8::HandleScope scope;
v8_this_ = v8::Persistent<v8::External>::New(v8::External::New(this));
v8::Local<v8::ObjectTemplate> global_template = v8::ObjectTemplate::New();
// Attach the javascript bindings.
v8::Local<v8::FunctionTemplate> alert_template =
v8::FunctionTemplate::New(&AlertCallback, v8_this_);
global_template->Set(ASCIILiteralToV8String("alert"), alert_template);
v8::Local<v8::FunctionTemplate> my_ip_address_template =
v8::FunctionTemplate::New(&MyIpAddressCallback, v8_this_);
global_template->Set(ASCIILiteralToV8String("myIpAddress"),
my_ip_address_template);
v8::Local<v8::FunctionTemplate> dns_resolve_template =
v8::FunctionTemplate::New(&DnsResolveCallback, v8_this_);
global_template->Set(ASCIILiteralToV8String("dnsResolve"),
dns_resolve_template);
// Microsoft's PAC extensions:
v8::Local<v8::FunctionTemplate> dns_resolve_ex_template =
v8::FunctionTemplate::New(&DnsResolveExCallback, v8_this_);
global_template->Set(ASCIILiteralToV8String("dnsResolveEx"),
dns_resolve_ex_template);
v8::Local<v8::FunctionTemplate> my_ip_address_ex_template =
v8::FunctionTemplate::New(&MyIpAddressExCallback, v8_this_);
global_template->Set(ASCIILiteralToV8String("myIpAddressEx"),
my_ip_address_ex_template);
v8::Local<v8::FunctionTemplate> sort_ip_address_list_template =
v8::FunctionTemplate::New(&SortIpAddressListCallback, v8_this_);
global_template->Set(ASCIILiteralToV8String("sortIpAddressList"),
sort_ip_address_list_template);
v8::Local<v8::FunctionTemplate> is_in_net_ex_template =
v8::FunctionTemplate::New(&IsInNetExCallback, v8_this_);
global_template->Set(ASCIILiteralToV8String("isInNetEx"),
is_in_net_ex_template);
v8_context_ = v8::Context::New(NULL, global_template);
v8::Context::Scope ctx(v8_context_);
// Add the PAC utility functions to the environment.
// (This script should never fail, as it is a string literal!)
// Note that the two string literals are concatenated.
int rv = RunScript(
ASCIILiteralToV8String(
PROXY_RESOLVER_SCRIPT
PROXY_RESOLVER_SCRIPT_EX),
kPacUtilityResourceName);
if (rv != OK) {
NOTREACHED();
return rv;
}
// Add the user's PAC code to the environment.
rv = RunScript(ScriptDataToV8String(pac_script), kPacResourceName);
if (rv != OK)
return rv;
// At a minimum, the FindProxyForURL() function must be defined for this
// to be a legitimiate PAC script.
v8::Local<v8::Value> function;
if (!GetFindProxyForURL(&function)) {
js_bindings_->OnError(
-1, ASCIIToUTF16("FindProxyForURL() is undefined."));
return ERR_PAC_SCRIPT_FAILED;
}
return OK;
}
void SetCurrentRequestContext(ProxyResolverRequestContext* context) {
js_bindings_->set_current_request_context(context);
}
void PurgeMemory() {
v8::Locker locked;
// Repeatedly call the V8 idle notification until it returns true ("nothing
// more to free"). Note that it makes more sense to do this than to
// implement a new "delete everything" pass because object references make
// it difficult to free everything possible in just one pass.
while (!v8::V8::IdleNotification())
;
}
private:
bool GetFindProxyForURL(v8::Local<v8::Value>* function) {
*function = v8_context_->Global()->Get(
ASCIILiteralToV8String("FindProxyForURL"));
return (*function)->IsFunction();
}
// Handle an exception thrown by V8.
void HandleError(v8::Handle<v8::Message> message) {
if (message.IsEmpty())
return;
// Otherwise dispatch to the bindings.
int line_number = message->GetLineNumber();
string16 error_message;
V8ObjectToUTF16String(message->Get(), &error_message);
js_bindings_->OnError(line_number, error_message);
}
// Compiles and runs |script| in the current V8 context.
// Returns OK on success, otherwise an error code.
int RunScript(v8::Handle<v8::String> script, const char* script_name) {
v8::TryCatch try_catch;
// Compile the script.
v8::ScriptOrigin origin =
v8::ScriptOrigin(ASCIILiteralToV8String(script_name));
v8::Local<v8::Script> code = v8::Script::Compile(script, &origin);
// Execute.
if (!code.IsEmpty())
code->Run();
// Check for errors.
if (try_catch.HasCaught()) {
HandleError(try_catch.Message());
return ERR_PAC_SCRIPT_FAILED;
}
return OK;
}
// V8 callback for when "alert()" is invoked by the PAC script.
static v8::Handle<v8::Value> AlertCallback(const v8::Arguments& args) {
Context* context =
static_cast<Context*>(v8::External::Cast(*args.Data())->Value());
// Like firefox we assume "undefined" if no argument was specified, and
// disregard any arguments beyond the first.
string16 message;
if (args.Length() == 0) {
message = ASCIIToUTF16("undefined");
} else {
if (!V8ObjectToUTF16String(args[0], &message))
return v8::Undefined(); // toString() threw an exception.
}
context->js_bindings_->Alert(message);
return v8::Undefined();
}
// V8 callback for when "myIpAddress()" is invoked by the PAC script.
static v8::Handle<v8::Value> MyIpAddressCallback(const v8::Arguments& args) {
Context* context =
static_cast<Context*>(v8::External::Cast(*args.Data())->Value());
std::string result;
bool success;
{
v8::Unlocker unlocker;
// We shouldn't be called with any arguments, but will not complain if
// we are.
success = context->js_bindings_->MyIpAddress(&result);
}
if (!success)
return ASCIILiteralToV8String("127.0.0.1");
return ASCIIStringToV8String(result);
}
// V8 callback for when "myIpAddressEx()" is invoked by the PAC script.
static v8::Handle<v8::Value> MyIpAddressExCallback(
const v8::Arguments& args) {
Context* context =
static_cast<Context*>(v8::External::Cast(*args.Data())->Value());
std::string ip_address_list;
bool success;
{
v8::Unlocker unlocker;
// We shouldn't be called with any arguments, but will not complain if
// we are.
success = context->js_bindings_->MyIpAddressEx(&ip_address_list);
}
if (!success)
ip_address_list = std::string();
return ASCIIStringToV8String(ip_address_list);
}
// V8 callback for when "dnsResolve()" is invoked by the PAC script.
static v8::Handle<v8::Value> DnsResolveCallback(const v8::Arguments& args) {
Context* context =
static_cast<Context*>(v8::External::Cast(*args.Data())->Value());
// We need at least one string argument.
std::string hostname;
if (!GetHostnameArgument(args, &hostname))
return v8::Null();
std::string ip_address;
bool success;
{
v8::Unlocker unlocker;
success = context->js_bindings_->DnsResolve(hostname, &ip_address);
}
return success ? ASCIIStringToV8String(ip_address) : v8::Null();
}
// V8 callback for when "dnsResolveEx()" is invoked by the PAC script.
static v8::Handle<v8::Value> DnsResolveExCallback(const v8::Arguments& args) {
Context* context =
static_cast<Context*>(v8::External::Cast(*args.Data())->Value());
// We need at least one string argument.
std::string hostname;
if (!GetHostnameArgument(args, &hostname))
return v8::Undefined();
std::string ip_address_list;
bool success;
{
v8::Unlocker unlocker;
success = context->js_bindings_->DnsResolveEx(hostname, &ip_address_list);
}
if (!success)
ip_address_list = std::string();
return ASCIIStringToV8String(ip_address_list);
}
// V8 callback for when "sortIpAddressList()" is invoked by the PAC script.
static v8::Handle<v8::Value> SortIpAddressListCallback(
const v8::Arguments& args) {
// We need at least one string argument.
if (args.Length() == 0 || args[0].IsEmpty() || !args[0]->IsString())
return v8::Null();
std::string ip_address_list = V8StringToUTF8(args[0]->ToString());
if (!IsStringASCII(ip_address_list))
return v8::Null();
std::string sorted_ip_address_list;
bool success = SortIpAddressList(ip_address_list, &sorted_ip_address_list);
if (!success)
return v8::False();
return ASCIIStringToV8String(sorted_ip_address_list);
}
// V8 callback for when "isInNetEx()" is invoked by the PAC script.
static v8::Handle<v8::Value> IsInNetExCallback(const v8::Arguments& args) {
// We need at least 2 string arguments.
if (args.Length() < 2 || args[0].IsEmpty() || !args[0]->IsString() ||
args[1].IsEmpty() || !args[1]->IsString())
return v8::Null();
std::string ip_address = V8StringToUTF8(args[0]->ToString());
if (!IsStringASCII(ip_address))
return v8::False();
std::string ip_prefix = V8StringToUTF8(args[1]->ToString());
if (!IsStringASCII(ip_prefix))
return v8::False();
return IsInNetEx(ip_address, ip_prefix) ? v8::True() : v8::False();
}
ProxyResolverJSBindings* js_bindings_;
v8::Persistent<v8::External> v8_this_;
v8::Persistent<v8::Context> v8_context_;
};
// ProxyResolverV8 ------------------------------------------------------------
ProxyResolverV8::ProxyResolverV8(
ProxyResolverJSBindings* custom_js_bindings)
: ProxyResolver(true /*expects_pac_bytes*/),
js_bindings_(custom_js_bindings) {
}
ProxyResolverV8::~ProxyResolverV8() {}
int ProxyResolverV8::GetProxyForURL(const GURL& query_url,
ProxyInfo* results,
CompletionCallback* /*callback*/,
RequestHandle* /*request*/,
const BoundNetLog& net_log) {
// If the V8 instance has not been initialized (either because
// SetPacScript() wasn't called yet, or because it failed.
if (!context_.get())
return ERR_FAILED;
// Associate some short-lived context with this request. This context will be
// available to any of the javascript "bindings" that are subsequently invoked
// from the javascript.
//
// In particular, we create a HostCache that is aggressive about caching
// failed DNS resolves.
HostCache host_cache(
50,
base::TimeDelta::FromMinutes(5),
base::TimeDelta::FromMinutes(5));
ProxyResolverRequestContext request_context(&net_log, &host_cache);
// Otherwise call into V8.
context_->SetCurrentRequestContext(&request_context);
int rv = context_->ResolveProxy(query_url, results);
context_->SetCurrentRequestContext(NULL);
return rv;
}
void ProxyResolverV8::CancelRequest(RequestHandle request) {
// This is a synchronous ProxyResolver; no possibility for async requests.
NOTREACHED();
}
void ProxyResolverV8::CancelSetPacScript() {
NOTREACHED();
}
void ProxyResolverV8::PurgeMemory() {
context_->PurgeMemory();
}
void ProxyResolverV8::Shutdown() {
js_bindings_->Shutdown();
}
int ProxyResolverV8::SetPacScript(
const scoped_refptr<ProxyResolverScriptData>& script_data,
CompletionCallback* /*callback*/) {
DCHECK(script_data.get());
context_.reset();
if (script_data->utf16().empty())
return ERR_PAC_SCRIPT_FAILED;
// Try parsing the PAC script.
scoped_ptr<Context> context(new Context(js_bindings_.get()));
int rv = context->InitV8(script_data);
if (rv == OK)
context_.reset(context.release());
return rv;
}
} // namespace net