Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 28 | #include <include/v8.h> |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 29 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 30 | #include <include/libplatform/libplatform.h> |
| 31 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 32 | #include <map> |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 33 | #include <string> |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 35 | #ifdef COMPRESS_STARTUP_DATA_BZ2 |
| 36 | #error Using compressed startup data is not supported for this sample |
| 37 | #endif |
| 38 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 39 | using namespace std; |
| 40 | using namespace v8; |
| 41 | |
| 42 | // These interfaces represent an existing request processing interface. |
| 43 | // The idea is to imagine a real application that uses these interfaces |
| 44 | // and then add scripting capabilities that allow you to interact with |
| 45 | // the objects through JavaScript. |
| 46 | |
| 47 | /** |
| 48 | * A simplified http request. |
| 49 | */ |
| 50 | class HttpRequest { |
| 51 | public: |
| 52 | virtual ~HttpRequest() { } |
| 53 | virtual const string& Path() = 0; |
| 54 | virtual const string& Referrer() = 0; |
| 55 | virtual const string& Host() = 0; |
| 56 | virtual const string& UserAgent() = 0; |
| 57 | }; |
| 58 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 59 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 60 | /** |
| 61 | * The abstract superclass of http request processors. |
| 62 | */ |
| 63 | class HttpRequestProcessor { |
| 64 | public: |
| 65 | virtual ~HttpRequestProcessor() { } |
| 66 | |
| 67 | // Initialize this processor. The map contains options that control |
| 68 | // how requests should be processed. |
| 69 | virtual bool Initialize(map<string, string>* options, |
| 70 | map<string, string>* output) = 0; |
| 71 | |
| 72 | // Process a single request. |
| 73 | virtual bool Process(HttpRequest* req) = 0; |
| 74 | |
| 75 | static void Log(const char* event); |
| 76 | }; |
| 77 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 78 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 79 | /** |
| 80 | * An http request processor that is scriptable using JavaScript. |
| 81 | */ |
| 82 | class JsHttpRequestProcessor : public HttpRequestProcessor { |
| 83 | public: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 84 | // Creates a new processor that processes requests by invoking the |
| 85 | // Process function of the JavaScript script given as an argument. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 86 | JsHttpRequestProcessor(Isolate* isolate, Handle<String> script) |
| 87 | : isolate_(isolate), script_(script) { } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 88 | virtual ~JsHttpRequestProcessor(); |
| 89 | |
| 90 | virtual bool Initialize(map<string, string>* opts, |
| 91 | map<string, string>* output); |
| 92 | virtual bool Process(HttpRequest* req); |
| 93 | |
| 94 | private: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 95 | // Execute the script associated with this processor and extract the |
| 96 | // Process function. Returns true if this succeeded, otherwise false. |
| 97 | bool ExecuteScript(Handle<String> script); |
| 98 | |
| 99 | // Wrap the options and output map in a JavaScript objects and |
| 100 | // install it in the global namespace as 'options' and 'output'. |
| 101 | bool InstallMaps(map<string, string>* opts, map<string, string>* output); |
| 102 | |
| 103 | // Constructs the template that describes the JavaScript wrapper |
| 104 | // type for requests. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 105 | static Handle<ObjectTemplate> MakeRequestTemplate(Isolate* isolate); |
| 106 | static Handle<ObjectTemplate> MakeMapTemplate(Isolate* isolate); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 107 | |
| 108 | // Callbacks that access the individual fields of request objects. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 109 | static void GetPath(Local<String> name, |
| 110 | const PropertyCallbackInfo<Value>& info); |
| 111 | static void GetReferrer(Local<String> name, |
| 112 | const PropertyCallbackInfo<Value>& info); |
| 113 | static void GetHost(Local<String> name, |
| 114 | const PropertyCallbackInfo<Value>& info); |
| 115 | static void GetUserAgent(Local<String> name, |
| 116 | const PropertyCallbackInfo<Value>& info); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 117 | |
| 118 | // Callbacks that access maps |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 119 | static void MapGet(Local<String> name, |
| 120 | const PropertyCallbackInfo<Value>& info); |
| 121 | static void MapSet(Local<String> name, |
| 122 | Local<Value> value, |
| 123 | const PropertyCallbackInfo<Value>& info); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 124 | |
| 125 | // Utility methods for wrapping C++ objects as JavaScript objects, |
| 126 | // and going back again. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 127 | Handle<Object> WrapMap(map<string, string>* obj); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 128 | static map<string, string>* UnwrapMap(Handle<Object> obj); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 129 | Handle<Object> WrapRequest(HttpRequest* obj); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 130 | static HttpRequest* UnwrapRequest(Handle<Object> obj); |
| 131 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 132 | Isolate* GetIsolate() { return isolate_; } |
| 133 | |
| 134 | Isolate* isolate_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 135 | Handle<String> script_; |
| 136 | Persistent<Context> context_; |
| 137 | Persistent<Function> process_; |
| 138 | static Persistent<ObjectTemplate> request_template_; |
| 139 | static Persistent<ObjectTemplate> map_template_; |
| 140 | }; |
| 141 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 142 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 143 | // ------------------------- |
| 144 | // --- P r o c e s s o r --- |
| 145 | // ------------------------- |
| 146 | |
| 147 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 148 | static void LogCallback(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 149 | if (args.Length() < 1) return; |
| 150 | HandleScope scope(args.GetIsolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 151 | Handle<Value> arg = args[0]; |
| 152 | String::Utf8Value value(arg); |
| 153 | HttpRequestProcessor::Log(*value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | |
| 157 | // Execute the script and fetch the Process method. |
| 158 | bool JsHttpRequestProcessor::Initialize(map<string, string>* opts, |
| 159 | map<string, string>* output) { |
| 160 | // Create a handle scope to hold the temporary references. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 161 | HandleScope handle_scope(GetIsolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 162 | |
| 163 | // Create a template for the global object where we set the |
| 164 | // built-in global functions. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 165 | Handle<ObjectTemplate> global = ObjectTemplate::New(GetIsolate()); |
| 166 | global->Set(String::NewFromUtf8(GetIsolate(), "log"), |
| 167 | FunctionTemplate::New(GetIsolate(), LogCallback)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 168 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 169 | // Each processor gets its own context so different processors don't |
| 170 | // affect each other. Context::New returns a persistent handle which |
| 171 | // is what we need for the reference to remain after we return from |
| 172 | // this method. That persistent handle has to be disposed in the |
| 173 | // destructor. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 174 | v8::Handle<v8::Context> context = Context::New(GetIsolate(), NULL, global); |
| 175 | context_.Reset(GetIsolate(), context); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 176 | |
| 177 | // Enter the new context so all the following operations take place |
| 178 | // within it. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 179 | Context::Scope context_scope(context); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 180 | |
| 181 | // Make the options mapping available within the context |
| 182 | if (!InstallMaps(opts, output)) |
| 183 | return false; |
| 184 | |
| 185 | // Compile and run the script |
| 186 | if (!ExecuteScript(script_)) |
| 187 | return false; |
| 188 | |
| 189 | // The script compiled and ran correctly. Now we fetch out the |
| 190 | // Process function from the global object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 191 | Handle<String> process_name = String::NewFromUtf8(GetIsolate(), "Process"); |
| 192 | Handle<Value> process_val = context->Global()->Get(process_name); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 193 | |
| 194 | // If there is no Process function, or if it is not a function, |
| 195 | // bail out |
| 196 | if (!process_val->IsFunction()) return false; |
| 197 | |
| 198 | // It is a function; cast it to a Function |
| 199 | Handle<Function> process_fun = Handle<Function>::Cast(process_val); |
| 200 | |
| 201 | // Store the function in a Persistent handle, since we also want |
| 202 | // that to remain after this call returns |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 203 | process_.Reset(GetIsolate(), process_fun); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 204 | |
| 205 | // All done; all went well |
| 206 | return true; |
| 207 | } |
| 208 | |
| 209 | |
| 210 | bool JsHttpRequestProcessor::ExecuteScript(Handle<String> script) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 211 | HandleScope handle_scope(GetIsolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 212 | |
| 213 | // We're just about to compile the script; set up an error handler to |
| 214 | // catch any exceptions the script might throw. |
| 215 | TryCatch try_catch; |
| 216 | |
| 217 | // Compile the script and check for errors. |
| 218 | Handle<Script> compiled_script = Script::Compile(script); |
| 219 | if (compiled_script.IsEmpty()) { |
| 220 | String::Utf8Value error(try_catch.Exception()); |
| 221 | Log(*error); |
| 222 | // The script failed to compile; bail out. |
| 223 | return false; |
| 224 | } |
| 225 | |
| 226 | // Run the script! |
| 227 | Handle<Value> result = compiled_script->Run(); |
| 228 | if (result.IsEmpty()) { |
| 229 | // The TryCatch above is still in effect and will have caught the error. |
| 230 | String::Utf8Value error(try_catch.Exception()); |
| 231 | Log(*error); |
| 232 | // Running the script failed; bail out. |
| 233 | return false; |
| 234 | } |
| 235 | return true; |
| 236 | } |
| 237 | |
| 238 | |
| 239 | bool JsHttpRequestProcessor::InstallMaps(map<string, string>* opts, |
| 240 | map<string, string>* output) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 241 | HandleScope handle_scope(GetIsolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 242 | |
| 243 | // Wrap the map object in a JavaScript wrapper |
| 244 | Handle<Object> opts_obj = WrapMap(opts); |
| 245 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 246 | v8::Local<v8::Context> context = |
| 247 | v8::Local<v8::Context>::New(GetIsolate(), context_); |
| 248 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 249 | // Set the options object as a property on the global object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 250 | context->Global()->Set(String::NewFromUtf8(GetIsolate(), "options"), |
| 251 | opts_obj); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 252 | |
| 253 | Handle<Object> output_obj = WrapMap(output); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 254 | context->Global()->Set(String::NewFromUtf8(GetIsolate(), "output"), |
| 255 | output_obj); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 256 | |
| 257 | return true; |
| 258 | } |
| 259 | |
| 260 | |
| 261 | bool JsHttpRequestProcessor::Process(HttpRequest* request) { |
| 262 | // Create a handle scope to keep the temporary object references. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 263 | HandleScope handle_scope(GetIsolate()); |
| 264 | |
| 265 | v8::Local<v8::Context> context = |
| 266 | v8::Local<v8::Context>::New(GetIsolate(), context_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 267 | |
| 268 | // Enter this processor's context so all the remaining operations |
| 269 | // take place there |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 270 | Context::Scope context_scope(context); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 271 | |
| 272 | // Wrap the C++ request object in a JavaScript wrapper |
| 273 | Handle<Object> request_obj = WrapRequest(request); |
| 274 | |
| 275 | // Set up an exception handler before calling the Process function |
| 276 | TryCatch try_catch; |
| 277 | |
| 278 | // Invoke the process function, giving the global object as 'this' |
| 279 | // and one argument, the request. |
| 280 | const int argc = 1; |
| 281 | Handle<Value> argv[argc] = { request_obj }; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 282 | v8::Local<v8::Function> process = |
| 283 | v8::Local<v8::Function>::New(GetIsolate(), process_); |
| 284 | Handle<Value> result = process->Call(context->Global(), argc, argv); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 285 | if (result.IsEmpty()) { |
| 286 | String::Utf8Value error(try_catch.Exception()); |
| 287 | Log(*error); |
| 288 | return false; |
| 289 | } else { |
| 290 | return true; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | |
| 295 | JsHttpRequestProcessor::~JsHttpRequestProcessor() { |
| 296 | // Dispose the persistent handles. When noone else has any |
| 297 | // references to the objects stored in the handles they will be |
| 298 | // automatically reclaimed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 299 | context_.Reset(); |
| 300 | process_.Reset(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | |
| 304 | Persistent<ObjectTemplate> JsHttpRequestProcessor::request_template_; |
| 305 | Persistent<ObjectTemplate> JsHttpRequestProcessor::map_template_; |
| 306 | |
| 307 | |
| 308 | // ----------------------------------- |
| 309 | // --- A c c e s s i n g M a p s --- |
| 310 | // ----------------------------------- |
| 311 | |
| 312 | // Utility function that wraps a C++ http request object in a |
| 313 | // JavaScript object. |
| 314 | Handle<Object> JsHttpRequestProcessor::WrapMap(map<string, string>* obj) { |
| 315 | // Handle scope for temporary handles. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 316 | EscapableHandleScope handle_scope(GetIsolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 317 | |
| 318 | // Fetch the template for creating JavaScript map wrappers. |
| 319 | // It only has to be created once, which we do on demand. |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 320 | if (map_template_.IsEmpty()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 321 | Handle<ObjectTemplate> raw_template = MakeMapTemplate(GetIsolate()); |
| 322 | map_template_.Reset(GetIsolate(), raw_template); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 323 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 324 | Handle<ObjectTemplate> templ = |
| 325 | Local<ObjectTemplate>::New(GetIsolate(), map_template_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 326 | |
| 327 | // Create an empty map wrapper. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 328 | Local<Object> result = templ->NewInstance(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 329 | |
| 330 | // Wrap the raw C++ pointer in an External so it can be referenced |
| 331 | // from within JavaScript. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 332 | Handle<External> map_ptr = External::New(GetIsolate(), obj); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 333 | |
| 334 | // Store the map pointer in the JavaScript wrapper. |
| 335 | result->SetInternalField(0, map_ptr); |
| 336 | |
| 337 | // Return the result through the current handle scope. Since each |
| 338 | // of these handles will go away when the handle scope is deleted |
| 339 | // we need to call Close to let one, the result, escape into the |
| 340 | // outer handle scope. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 341 | return handle_scope.Escape(result); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | |
| 345 | // Utility function that extracts the C++ map pointer from a wrapper |
| 346 | // object. |
| 347 | map<string, string>* JsHttpRequestProcessor::UnwrapMap(Handle<Object> obj) { |
| 348 | Handle<External> field = Handle<External>::Cast(obj->GetInternalField(0)); |
| 349 | void* ptr = field->Value(); |
| 350 | return static_cast<map<string, string>*>(ptr); |
| 351 | } |
| 352 | |
| 353 | |
| 354 | // Convert a JavaScript string to a std::string. To not bother too |
| 355 | // much with string encodings we just use ascii. |
| 356 | string ObjectToString(Local<Value> value) { |
| 357 | String::Utf8Value utf8_value(value); |
| 358 | return string(*utf8_value); |
| 359 | } |
| 360 | |
| 361 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 362 | void JsHttpRequestProcessor::MapGet(Local<String> name, |
| 363 | const PropertyCallbackInfo<Value>& info) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 364 | // Fetch the map wrapped by this object. |
| 365 | map<string, string>* obj = UnwrapMap(info.Holder()); |
| 366 | |
| 367 | // Convert the JavaScript string to a std::string. |
| 368 | string key = ObjectToString(name); |
| 369 | |
| 370 | // Look up the value if it exists using the standard STL ideom. |
| 371 | map<string, string>::iterator iter = obj->find(key); |
| 372 | |
| 373 | // If the key is not present return an empty handle as signal |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 374 | if (iter == obj->end()) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 375 | |
| 376 | // Otherwise fetch the value and wrap it in a JavaScript string |
| 377 | const string& value = (*iter).second; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 378 | info.GetReturnValue().Set(String::NewFromUtf8( |
| 379 | info.GetIsolate(), value.c_str(), String::kNormalString, |
| 380 | static_cast<int>(value.length()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 384 | void JsHttpRequestProcessor::MapSet(Local<String> name, |
| 385 | Local<Value> value_obj, |
| 386 | const PropertyCallbackInfo<Value>& info) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 387 | // Fetch the map wrapped by this object. |
| 388 | map<string, string>* obj = UnwrapMap(info.Holder()); |
| 389 | |
| 390 | // Convert the key and value to std::strings. |
| 391 | string key = ObjectToString(name); |
| 392 | string value = ObjectToString(value_obj); |
| 393 | |
| 394 | // Update the map. |
| 395 | (*obj)[key] = value; |
| 396 | |
| 397 | // Return the value; any non-empty handle will work. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 398 | info.GetReturnValue().Set(value_obj); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 402 | Handle<ObjectTemplate> JsHttpRequestProcessor::MakeMapTemplate( |
| 403 | Isolate* isolate) { |
| 404 | EscapableHandleScope handle_scope(isolate); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 405 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 406 | Local<ObjectTemplate> result = ObjectTemplate::New(isolate); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 407 | result->SetInternalFieldCount(1); |
| 408 | result->SetNamedPropertyHandler(MapGet, MapSet); |
| 409 | |
| 410 | // Again, return the result through the current handle scope. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 411 | return handle_scope.Escape(result); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | |
| 415 | // ------------------------------------------- |
| 416 | // --- A c c e s s i n g R e q u e s t s --- |
| 417 | // ------------------------------------------- |
| 418 | |
| 419 | /** |
| 420 | * Utility function that wraps a C++ http request object in a |
| 421 | * JavaScript object. |
| 422 | */ |
| 423 | Handle<Object> JsHttpRequestProcessor::WrapRequest(HttpRequest* request) { |
| 424 | // Handle scope for temporary handles. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 425 | EscapableHandleScope handle_scope(GetIsolate()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 426 | |
| 427 | // Fetch the template for creating JavaScript http request wrappers. |
| 428 | // It only has to be created once, which we do on demand. |
| 429 | if (request_template_.IsEmpty()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 430 | Handle<ObjectTemplate> raw_template = MakeRequestTemplate(GetIsolate()); |
| 431 | request_template_.Reset(GetIsolate(), raw_template); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 432 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 433 | Handle<ObjectTemplate> templ = |
| 434 | Local<ObjectTemplate>::New(GetIsolate(), request_template_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 435 | |
| 436 | // Create an empty http request wrapper. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 437 | Local<Object> result = templ->NewInstance(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 438 | |
| 439 | // Wrap the raw C++ pointer in an External so it can be referenced |
| 440 | // from within JavaScript. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 441 | Handle<External> request_ptr = External::New(GetIsolate(), request); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 442 | |
| 443 | // Store the request pointer in the JavaScript wrapper. |
| 444 | result->SetInternalField(0, request_ptr); |
| 445 | |
| 446 | // Return the result through the current handle scope. Since each |
| 447 | // of these handles will go away when the handle scope is deleted |
| 448 | // we need to call Close to let one, the result, escape into the |
| 449 | // outer handle scope. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 450 | return handle_scope.Escape(result); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 451 | } |
| 452 | |
| 453 | |
| 454 | /** |
| 455 | * Utility function that extracts the C++ http request object from a |
| 456 | * wrapper object. |
| 457 | */ |
| 458 | HttpRequest* JsHttpRequestProcessor::UnwrapRequest(Handle<Object> obj) { |
| 459 | Handle<External> field = Handle<External>::Cast(obj->GetInternalField(0)); |
| 460 | void* ptr = field->Value(); |
| 461 | return static_cast<HttpRequest*>(ptr); |
| 462 | } |
| 463 | |
| 464 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 465 | void JsHttpRequestProcessor::GetPath(Local<String> name, |
| 466 | const PropertyCallbackInfo<Value>& info) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 467 | // Extract the C++ request object from the JavaScript wrapper. |
| 468 | HttpRequest* request = UnwrapRequest(info.Holder()); |
| 469 | |
| 470 | // Fetch the path. |
| 471 | const string& path = request->Path(); |
| 472 | |
| 473 | // Wrap the result in a JavaScript string and return it. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 474 | info.GetReturnValue().Set(String::NewFromUtf8( |
| 475 | info.GetIsolate(), path.c_str(), String::kNormalString, |
| 476 | static_cast<int>(path.length()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 480 | void JsHttpRequestProcessor::GetReferrer( |
| 481 | Local<String> name, |
| 482 | const PropertyCallbackInfo<Value>& info) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 483 | HttpRequest* request = UnwrapRequest(info.Holder()); |
| 484 | const string& path = request->Referrer(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 485 | info.GetReturnValue().Set(String::NewFromUtf8( |
| 486 | info.GetIsolate(), path.c_str(), String::kNormalString, |
| 487 | static_cast<int>(path.length()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 491 | void JsHttpRequestProcessor::GetHost(Local<String> name, |
| 492 | const PropertyCallbackInfo<Value>& info) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 493 | HttpRequest* request = UnwrapRequest(info.Holder()); |
| 494 | const string& path = request->Host(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 495 | info.GetReturnValue().Set(String::NewFromUtf8( |
| 496 | info.GetIsolate(), path.c_str(), String::kNormalString, |
| 497 | static_cast<int>(path.length()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 498 | } |
| 499 | |
| 500 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 501 | void JsHttpRequestProcessor::GetUserAgent( |
| 502 | Local<String> name, |
| 503 | const PropertyCallbackInfo<Value>& info) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 504 | HttpRequest* request = UnwrapRequest(info.Holder()); |
| 505 | const string& path = request->UserAgent(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 506 | info.GetReturnValue().Set(String::NewFromUtf8( |
| 507 | info.GetIsolate(), path.c_str(), String::kNormalString, |
| 508 | static_cast<int>(path.length()))); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 512 | Handle<ObjectTemplate> JsHttpRequestProcessor::MakeRequestTemplate( |
| 513 | Isolate* isolate) { |
| 514 | EscapableHandleScope handle_scope(isolate); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 515 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 516 | Local<ObjectTemplate> result = ObjectTemplate::New(isolate); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 517 | result->SetInternalFieldCount(1); |
| 518 | |
| 519 | // Add accessors for each of the fields of the request. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 520 | result->SetAccessor( |
| 521 | String::NewFromUtf8(isolate, "path", String::kInternalizedString), |
| 522 | GetPath); |
| 523 | result->SetAccessor( |
| 524 | String::NewFromUtf8(isolate, "referrer", String::kInternalizedString), |
| 525 | GetReferrer); |
| 526 | result->SetAccessor( |
| 527 | String::NewFromUtf8(isolate, "host", String::kInternalizedString), |
| 528 | GetHost); |
| 529 | result->SetAccessor( |
| 530 | String::NewFromUtf8(isolate, "userAgent", String::kInternalizedString), |
| 531 | GetUserAgent); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 532 | |
| 533 | // Again, return the result through the current handle scope. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 534 | return handle_scope.Escape(result); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | |
| 538 | // --- Test --- |
| 539 | |
| 540 | |
| 541 | void HttpRequestProcessor::Log(const char* event) { |
| 542 | printf("Logged: %s\n", event); |
| 543 | } |
| 544 | |
| 545 | |
| 546 | /** |
| 547 | * A simplified http request. |
| 548 | */ |
| 549 | class StringHttpRequest : public HttpRequest { |
| 550 | public: |
| 551 | StringHttpRequest(const string& path, |
| 552 | const string& referrer, |
| 553 | const string& host, |
| 554 | const string& user_agent); |
| 555 | virtual const string& Path() { return path_; } |
| 556 | virtual const string& Referrer() { return referrer_; } |
| 557 | virtual const string& Host() { return host_; } |
| 558 | virtual const string& UserAgent() { return user_agent_; } |
| 559 | private: |
| 560 | string path_; |
| 561 | string referrer_; |
| 562 | string host_; |
| 563 | string user_agent_; |
| 564 | }; |
| 565 | |
| 566 | |
| 567 | StringHttpRequest::StringHttpRequest(const string& path, |
| 568 | const string& referrer, |
| 569 | const string& host, |
| 570 | const string& user_agent) |
| 571 | : path_(path), |
| 572 | referrer_(referrer), |
| 573 | host_(host), |
| 574 | user_agent_(user_agent) { } |
| 575 | |
| 576 | |
| 577 | void ParseOptions(int argc, |
| 578 | char* argv[], |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 579 | map<string, string>* options, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 580 | string* file) { |
| 581 | for (int i = 1; i < argc; i++) { |
| 582 | string arg = argv[i]; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 583 | size_t index = arg.find('=', 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 584 | if (index == string::npos) { |
| 585 | *file = arg; |
| 586 | } else { |
| 587 | string key = arg.substr(0, index); |
| 588 | string value = arg.substr(index+1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 589 | (*options)[key] = value; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 590 | } |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | |
| 595 | // Reads a file into a v8 string. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 596 | Handle<String> ReadFile(Isolate* isolate, const string& name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 597 | FILE* file = fopen(name.c_str(), "rb"); |
| 598 | if (file == NULL) return Handle<String>(); |
| 599 | |
| 600 | fseek(file, 0, SEEK_END); |
| 601 | int size = ftell(file); |
| 602 | rewind(file); |
| 603 | |
| 604 | char* chars = new char[size + 1]; |
| 605 | chars[size] = '\0'; |
| 606 | for (int i = 0; i < size;) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 607 | int read = static_cast<int>(fread(&chars[i], 1, size - i, file)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 608 | i += read; |
| 609 | } |
| 610 | fclose(file); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 611 | Handle<String> result = |
| 612 | String::NewFromUtf8(isolate, chars, String::kNormalString, size); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 613 | delete[] chars; |
| 614 | return result; |
| 615 | } |
| 616 | |
| 617 | |
| 618 | const int kSampleSize = 6; |
| 619 | StringHttpRequest kSampleRequests[kSampleSize] = { |
| 620 | StringHttpRequest("/process.cc", "localhost", "google.com", "firefox"), |
| 621 | StringHttpRequest("/", "localhost", "google.net", "firefox"), |
| 622 | StringHttpRequest("/", "localhost", "google.org", "safari"), |
| 623 | StringHttpRequest("/", "localhost", "yahoo.com", "ie"), |
| 624 | StringHttpRequest("/", "localhost", "yahoo.com", "safari"), |
| 625 | StringHttpRequest("/", "localhost", "yahoo.com", "firefox") |
| 626 | }; |
| 627 | |
| 628 | |
| 629 | bool ProcessEntries(HttpRequestProcessor* processor, int count, |
| 630 | StringHttpRequest* reqs) { |
| 631 | for (int i = 0; i < count; i++) { |
| 632 | if (!processor->Process(&reqs[i])) |
| 633 | return false; |
| 634 | } |
| 635 | return true; |
| 636 | } |
| 637 | |
| 638 | |
| 639 | void PrintMap(map<string, string>* m) { |
| 640 | for (map<string, string>::iterator i = m->begin(); i != m->end(); i++) { |
| 641 | pair<string, string> entry = *i; |
| 642 | printf("%s: %s\n", entry.first.c_str(), entry.second.c_str()); |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | |
| 647 | int main(int argc, char* argv[]) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 648 | v8::V8::InitializeICU(); |
| 649 | v8::Platform* platform = v8::platform::CreateDefaultPlatform(); |
| 650 | v8::V8::InitializePlatform(platform); |
| 651 | v8::V8::Initialize(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 652 | map<string, string> options; |
| 653 | string file; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 654 | ParseOptions(argc, argv, &options, &file); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 655 | if (file.empty()) { |
| 656 | fprintf(stderr, "No script was specified.\n"); |
| 657 | return 1; |
| 658 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 659 | Isolate* isolate = Isolate::New(); |
| 660 | Isolate::Scope isolate_scope(isolate); |
| 661 | HandleScope scope(isolate); |
| 662 | Handle<String> source = ReadFile(isolate, file); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 663 | if (source.IsEmpty()) { |
| 664 | fprintf(stderr, "Error reading '%s'.\n", file.c_str()); |
| 665 | return 1; |
| 666 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 667 | JsHttpRequestProcessor processor(isolate, source); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 668 | map<string, string> output; |
| 669 | if (!processor.Initialize(&options, &output)) { |
| 670 | fprintf(stderr, "Error initializing processor.\n"); |
| 671 | return 1; |
| 672 | } |
| 673 | if (!ProcessEntries(&processor, kSampleSize, kSampleRequests)) |
| 674 | return 1; |
| 675 | PrintMap(&output); |
| 676 | } |