summaryrefslogtreecommitdiffstats
path: root/V8Binding/v8/samples/process.cc
diff options
context:
space:
mode:
Diffstat (limited to 'V8Binding/v8/samples/process.cc')
-rw-r--r--V8Binding/v8/samples/process.cc622
1 files changed, 0 insertions, 622 deletions
diff --git a/V8Binding/v8/samples/process.cc b/V8Binding/v8/samples/process.cc
deleted file mode 100644
index 511e21a..0000000
--- a/V8Binding/v8/samples/process.cc
+++ /dev/null
@@ -1,622 +0,0 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include <v8.h>
-
-#include <string>
-#include <map>
-
-using namespace std;
-using namespace v8;
-
-// These interfaces represent an existing request processing interface.
-// The idea is to imagine a real application that uses these interfaces
-// and then add scripting capabilities that allow you to interact with
-// the objects through JavaScript.
-
-/**
- * A simplified http request.
- */
-class HttpRequest {
- public:
- virtual ~HttpRequest() { }
- virtual const string& Path() = 0;
- virtual const string& Referrer() = 0;
- virtual const string& Host() = 0;
- virtual const string& UserAgent() = 0;
-};
-
-/**
- * The abstract superclass of http request processors.
- */
-class HttpRequestProcessor {
- public:
- virtual ~HttpRequestProcessor() { }
-
- // Initialize this processor. The map contains options that control
- // how requests should be processed.
- virtual bool Initialize(map<string, string>* options,
- map<string, string>* output) = 0;
-
- // Process a single request.
- virtual bool Process(HttpRequest* req) = 0;
-
- static void Log(const char* event);
-};
-
-/**
- * An http request processor that is scriptable using JavaScript.
- */
-class JsHttpRequestProcessor : public HttpRequestProcessor {
- public:
-
- // Creates a new processor that processes requests by invoking the
- // Process function of the JavaScript script given as an argument.
- explicit JsHttpRequestProcessor(Handle<String> script) : script_(script) { }
- virtual ~JsHttpRequestProcessor();
-
- virtual bool Initialize(map<string, string>* opts,
- map<string, string>* output);
- virtual bool Process(HttpRequest* req);
-
- private:
-
- // Execute the script associated with this processor and extract the
- // Process function. Returns true if this succeeded, otherwise false.
- bool ExecuteScript(Handle<String> script);
-
- // Wrap the options and output map in a JavaScript objects and
- // install it in the global namespace as 'options' and 'output'.
- bool InstallMaps(map<string, string>* opts, map<string, string>* output);
-
- // Constructs the template that describes the JavaScript wrapper
- // type for requests.
- static Handle<ObjectTemplate> MakeRequestTemplate();
- static Handle<ObjectTemplate> MakeMapTemplate();
-
- // Callbacks that access the individual fields of request objects.
- static Handle<Value> GetPath(Local<String> name, const AccessorInfo& info);
- static Handle<Value> GetReferrer(Local<String> name,
- const AccessorInfo& info);
- static Handle<Value> GetHost(Local<String> name, const AccessorInfo& info);
- static Handle<Value> GetUserAgent(Local<String> name,
- const AccessorInfo& info);
-
- // Callbacks that access maps
- static Handle<Value> MapGet(Local<String> name, const AccessorInfo& info);
- static Handle<Value> MapSet(Local<String> name,
- Local<Value> value,
- const AccessorInfo& info);
-
- // Utility methods for wrapping C++ objects as JavaScript objects,
- // and going back again.
- static Handle<Object> WrapMap(map<string, string>* obj);
- static map<string, string>* UnwrapMap(Handle<Object> obj);
- static Handle<Object> WrapRequest(HttpRequest* obj);
- static HttpRequest* UnwrapRequest(Handle<Object> obj);
-
- Handle<String> script_;
- Persistent<Context> context_;
- Persistent<Function> process_;
- static Persistent<ObjectTemplate> request_template_;
- static Persistent<ObjectTemplate> map_template_;
-};
-
-// -------------------------
-// --- P r o c e s s o r ---
-// -------------------------
-
-
-static Handle<Value> LogCallback(const Arguments& args) {
- if (args.Length() < 1) return v8::Undefined();
- HandleScope scope;
- Handle<Value> arg = args[0];
- String::Utf8Value value(arg);
- HttpRequestProcessor::Log(*value);
- return v8::Undefined();
-}
-
-
-// Execute the script and fetch the Process method.
-bool JsHttpRequestProcessor::Initialize(map<string, string>* opts,
- map<string, string>* output) {
- // Create a handle scope to hold the temporary references.
- HandleScope handle_scope;
-
- // Create a template for the global object where we set the
- // built-in global functions.
- Handle<ObjectTemplate> global = ObjectTemplate::New();
- global->Set(String::New("log"), FunctionTemplate::New(LogCallback));
-
- // Each processor gets its own context so different processors
- // don't affect each other (ignore the first three lines).
- Handle<Context> context = Context::New(NULL, global);
-
- // Store the context in the processor object in a persistent handle,
- // since we want the reference to remain after we return from this
- // method.
- context_ = Persistent<Context>::New(context);
-
- // Enter the new context so all the following operations take place
- // within it.
- Context::Scope context_scope(context);
-
- // Make the options mapping available within the context
- if (!InstallMaps(opts, output))
- return false;
-
- // Compile and run the script
- if (!ExecuteScript(script_))
- return false;
-
- // The script compiled and ran correctly. Now we fetch out the
- // Process function from the global object.
- Handle<String> process_name = String::New("Process");
- Handle<Value> process_val = context->Global()->Get(process_name);
-
- // If there is no Process function, or if it is not a function,
- // bail out
- if (!process_val->IsFunction()) return false;
-
- // It is a function; cast it to a Function
- Handle<Function> process_fun = Handle<Function>::Cast(process_val);
-
- // Store the function in a Persistent handle, since we also want
- // that to remain after this call returns
- process_ = Persistent<Function>::New(process_fun);
-
- // All done; all went well
- return true;
-}
-
-
-bool JsHttpRequestProcessor::ExecuteScript(Handle<String> script) {
- HandleScope handle_scope;
-
- // We're just about to compile the script; set up an error handler to
- // catch any exceptions the script might throw.
- TryCatch try_catch;
-
- // Compile the script and check for errors.
- Handle<Script> compiled_script = Script::Compile(script);
- if (compiled_script.IsEmpty()) {
- String::Utf8Value error(try_catch.Exception());
- Log(*error);
- // The script failed to compile; bail out.
- return false;
- }
-
- // Run the script!
- Handle<Value> result = compiled_script->Run();
- if (result.IsEmpty()) {
- // The TryCatch above is still in effect and will have caught the error.
- String::Utf8Value error(try_catch.Exception());
- Log(*error);
- // Running the script failed; bail out.
- return false;
- }
- return true;
-}
-
-
-bool JsHttpRequestProcessor::InstallMaps(map<string, string>* opts,
- map<string, string>* output) {
- HandleScope handle_scope;
-
- // Wrap the map object in a JavaScript wrapper
- Handle<Object> opts_obj = WrapMap(opts);
-
- // Set the options object as a property on the global object.
- context_->Global()->Set(String::New("options"), opts_obj);
-
- Handle<Object> output_obj = WrapMap(output);
- context_->Global()->Set(String::New("output"), output_obj);
-
- return true;
-}
-
-
-bool JsHttpRequestProcessor::Process(HttpRequest* request) {
- // Create a handle scope to keep the temporary object references.
- HandleScope handle_scope;
-
- // Enter this processor's context so all the remaining operations
- // take place there
- Context::Scope context_scope(context_);
-
- // Wrap the C++ request object in a JavaScript wrapper
- Handle<Object> request_obj = WrapRequest(request);
-
- // Set up an exception handler before calling the Process function
- TryCatch try_catch;
-
- // Invoke the process function, giving the global object as 'this'
- // and one argument, the request.
- const int argc = 1;
- Handle<Value> argv[argc] = { request_obj };
- Handle<Value> result = process_->Call(context_->Global(), argc, argv);
- if (result.IsEmpty()) {
- String::Utf8Value error(try_catch.Exception());
- Log(*error);
- return false;
- } else {
- return true;
- }
-}
-
-
-JsHttpRequestProcessor::~JsHttpRequestProcessor() {
- // Dispose the persistent handles. When noone else has any
- // references to the objects stored in the handles they will be
- // automatically reclaimed.
- context_.Dispose();
- process_.Dispose();
-}
-
-
-Persistent<ObjectTemplate> JsHttpRequestProcessor::request_template_;
-Persistent<ObjectTemplate> JsHttpRequestProcessor::map_template_;
-
-
-// -----------------------------------
-// --- A c c e s s i n g M a p s ---
-// -----------------------------------
-
-// Utility function that wraps a C++ http request object in a
-// JavaScript object.
-Handle<Object> JsHttpRequestProcessor::WrapMap(map<string, string>* obj) {
- // Handle scope for temporary handles.
- HandleScope handle_scope;
-
- // Fetch the template for creating JavaScript map wrappers.
- // It only has to be created once, which we do on demand.
- if (request_template_.IsEmpty()) {
- Handle<ObjectTemplate> raw_template = MakeMapTemplate();
- map_template_ = Persistent<ObjectTemplate>::New(raw_template);
- }
- Handle<ObjectTemplate> templ = map_template_;
-
- // Create an empty map wrapper.
- Handle<Object> result = templ->NewInstance();
-
- // Wrap the raw C++ pointer in an External so it can be referenced
- // from within JavaScript.
- Handle<External> map_ptr = External::New(obj);
-
- // Store the map pointer in the JavaScript wrapper.
- result->SetInternalField(0, map_ptr);
-
- // Return the result through the current handle scope. Since each
- // of these handles will go away when the handle scope is deleted
- // we need to call Close to let one, the result, escape into the
- // outer handle scope.
- return handle_scope.Close(result);
-}
-
-
-// Utility function that extracts the C++ map pointer from a wrapper
-// object.
-map<string, string>* JsHttpRequestProcessor::UnwrapMap(Handle<Object> obj) {
- Handle<External> field = Handle<External>::Cast(obj->GetInternalField(0));
- void* ptr = field->Value();
- return static_cast<map<string, string>*>(ptr);
-}
-
-
-// Convert a JavaScript string to a std::string. To not bother too
-// much with string encodings we just use ascii.
-string ObjectToString(Local<Value> value) {
- String::Utf8Value utf8_value(value);
- return string(*utf8_value);
-}
-
-
-Handle<Value> JsHttpRequestProcessor::MapGet(Local<String> name,
- const AccessorInfo& info) {
- // Fetch the map wrapped by this object.
- map<string, string>* obj = UnwrapMap(info.Holder());
-
- // Convert the JavaScript string to a std::string.
- string key = ObjectToString(name);
-
- // Look up the value if it exists using the standard STL ideom.
- map<string, string>::iterator iter = obj->find(key);
-
- // If the key is not present return an empty handle as signal
- if (iter == obj->end()) return Handle<Value>();
-
- // Otherwise fetch the value and wrap it in a JavaScript string
- const string& value = (*iter).second;
- return String::New(value.c_str(), value.length());
-}
-
-
-Handle<Value> JsHttpRequestProcessor::MapSet(Local<String> name,
- Local<Value> value_obj,
- const AccessorInfo& info) {
- // Fetch the map wrapped by this object.
- map<string, string>* obj = UnwrapMap(info.Holder());
-
- // Convert the key and value to std::strings.
- string key = ObjectToString(name);
- string value = ObjectToString(value_obj);
-
- // Update the map.
- (*obj)[key] = value;
-
- // Return the value; any non-empty handle will work.
- return value_obj;
-}
-
-
-Handle<ObjectTemplate> JsHttpRequestProcessor::MakeMapTemplate() {
- HandleScope handle_scope;
-
- Handle<ObjectTemplate> result = ObjectTemplate::New();
- result->SetInternalFieldCount(1);
- result->SetNamedPropertyHandler(MapGet, MapSet);
-
- // Again, return the result through the current handle scope.
- return handle_scope.Close(result);
-}
-
-
-// -------------------------------------------
-// --- A c c e s s i n g R e q u e s t s ---
-// -------------------------------------------
-
-/**
- * Utility function that wraps a C++ http request object in a
- * JavaScript object.
- */
-Handle<Object> JsHttpRequestProcessor::WrapRequest(HttpRequest* request) {
- // Handle scope for temporary handles.
- HandleScope handle_scope;
-
- // Fetch the template for creating JavaScript http request wrappers.
- // It only has to be created once, which we do on demand.
- if (request_template_.IsEmpty()) {
- Handle<ObjectTemplate> raw_template = MakeRequestTemplate();
- request_template_ = Persistent<ObjectTemplate>::New(raw_template);
- }
- Handle<ObjectTemplate> templ = request_template_;
-
- // Create an empty http request wrapper.
- Handle<Object> result = templ->NewInstance();
-
- // Wrap the raw C++ pointer in an External so it can be referenced
- // from within JavaScript.
- Handle<External> request_ptr = External::New(request);
-
- // Store the request pointer in the JavaScript wrapper.
- result->SetInternalField(0, request_ptr);
-
- // Return the result through the current handle scope. Since each
- // of these handles will go away when the handle scope is deleted
- // we need to call Close to let one, the result, escape into the
- // outer handle scope.
- return handle_scope.Close(result);
-}
-
-
-/**
- * Utility function that extracts the C++ http request object from a
- * wrapper object.
- */
-HttpRequest* JsHttpRequestProcessor::UnwrapRequest(Handle<Object> obj) {
- Handle<External> field = Handle<External>::Cast(obj->GetInternalField(0));
- void* ptr = field->Value();
- return static_cast<HttpRequest*>(ptr);
-}
-
-
-Handle<Value> JsHttpRequestProcessor::GetPath(Local<String> name,
- const AccessorInfo& info) {
- // Extract the C++ request object from the JavaScript wrapper.
- HttpRequest* request = UnwrapRequest(info.Holder());
-
- // Fetch the path.
- const string& path = request->Path();
-
- // Wrap the result in a JavaScript string and return it.
- return String::New(path.c_str(), path.length());
-}
-
-
-Handle<Value> JsHttpRequestProcessor::GetReferrer(Local<String> name,
- const AccessorInfo& info) {
- HttpRequest* request = UnwrapRequest(info.Holder());
- const string& path = request->Referrer();
- return String::New(path.c_str(), path.length());
-}
-
-
-Handle<Value> JsHttpRequestProcessor::GetHost(Local<String> name,
- const AccessorInfo& info) {
- HttpRequest* request = UnwrapRequest(info.Holder());
- const string& path = request->Host();
- return String::New(path.c_str(), path.length());
-}
-
-
-Handle<Value> JsHttpRequestProcessor::GetUserAgent(Local<String> name,
- const AccessorInfo& info) {
- HttpRequest* request = UnwrapRequest(info.Holder());
- const string& path = request->UserAgent();
- return String::New(path.c_str(), path.length());
-}
-
-
-Handle<ObjectTemplate> JsHttpRequestProcessor::MakeRequestTemplate() {
- HandleScope handle_scope;
-
- Handle<ObjectTemplate> result = ObjectTemplate::New();
- result->SetInternalFieldCount(1);
-
- // Add accessors for each of the fields of the request.
- result->SetAccessor(String::NewSymbol("path"), GetPath);
- result->SetAccessor(String::NewSymbol("referrer"), GetReferrer);
- result->SetAccessor(String::NewSymbol("host"), GetHost);
- result->SetAccessor(String::NewSymbol("userAgent"), GetUserAgent);
-
- // Again, return the result through the current handle scope.
- return handle_scope.Close(result);
-}
-
-
-// --- Test ---
-
-
-void HttpRequestProcessor::Log(const char* event) {
- printf("Logged: %s\n", event);
-}
-
-
-/**
- * A simplified http request.
- */
-class StringHttpRequest : public HttpRequest {
- public:
- StringHttpRequest(const string& path,
- const string& referrer,
- const string& host,
- const string& user_agent);
- virtual const string& Path() { return path_; }
- virtual const string& Referrer() { return referrer_; }
- virtual const string& Host() { return host_; }
- virtual const string& UserAgent() { return user_agent_; }
- private:
- string path_;
- string referrer_;
- string host_;
- string user_agent_;
-};
-
-
-StringHttpRequest::StringHttpRequest(const string& path,
- const string& referrer,
- const string& host,
- const string& user_agent)
- : path_(path),
- referrer_(referrer),
- host_(host),
- user_agent_(user_agent) { }
-
-
-void ParseOptions(int argc,
- char* argv[],
- map<string, string>& options,
- string* file) {
- for (int i = 1; i < argc; i++) {
- string arg = argv[i];
- int index = arg.find('=', 0);
- if (index == string::npos) {
- *file = arg;
- } else {
- string key = arg.substr(0, index);
- string value = arg.substr(index+1);
- options[key] = value;
- }
- }
-}
-
-
-// Reads a file into a v8 string.
-Handle<String> ReadFile(const string& name) {
- FILE* file = fopen(name.c_str(), "rb");
- if (file == NULL) return Handle<String>();
-
- fseek(file, 0, SEEK_END);
- int size = ftell(file);
- rewind(file);
-
- char* chars = new char[size + 1];
- chars[size] = '\0';
- for (int i = 0; i < size;) {
- int read = fread(&chars[i], 1, size - i, file);
- i += read;
- }
- fclose(file);
- Handle<String> result = String::New(chars, size);
- delete[] chars;
- return result;
-}
-
-
-const int kSampleSize = 6;
-StringHttpRequest kSampleRequests[kSampleSize] = {
- StringHttpRequest("/process.cc", "localhost", "google.com", "firefox"),
- StringHttpRequest("/", "localhost", "google.net", "firefox"),
- StringHttpRequest("/", "localhost", "google.org", "safari"),
- StringHttpRequest("/", "localhost", "yahoo.com", "ie"),
- StringHttpRequest("/", "localhost", "yahoo.com", "safari"),
- StringHttpRequest("/", "localhost", "yahoo.com", "firefox")
-};
-
-
-bool ProcessEntries(HttpRequestProcessor* processor, int count,
- StringHttpRequest* reqs) {
- for (int i = 0; i < count; i++) {
- if (!processor->Process(&reqs[i]))
- return false;
- }
- return true;
-}
-
-
-void PrintMap(map<string, string>* m) {
- for (map<string, string>::iterator i = m->begin(); i != m->end(); i++) {
- pair<string, string> entry = *i;
- printf("%s: %s\n", entry.first.c_str(), entry.second.c_str());
- }
-}
-
-
-int main(int argc, char* argv[]) {
- map<string, string> options;
- string file;
- ParseOptions(argc, argv, options, &file);
- if (file.empty()) {
- fprintf(stderr, "No script was specified.\n");
- return 1;
- }
- HandleScope scope;
- Handle<String> source = ReadFile(file);
- if (source.IsEmpty()) {
- fprintf(stderr, "Error reading '%s'.\n", file.c_str());
- return 1;
- }
- JsHttpRequestProcessor processor(source);
- map<string, string> output;
- if (!processor.Initialize(&options, &output)) {
- fprintf(stderr, "Error initializing processor.\n");
- return 1;
- }
- if (!ProcessEntries(&processor, kSampleSize, kSampleRequests))
- return 1;
- PrintMap(&output);
-}
generated by cgit v1.1 at 2025-05-30 03:52:17 +0000