Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2008 the V8 project authors. All rights reserved. |
| 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 | |
| 28 | #include <v8.h> |
| 29 | |
| 30 | #include <string> |
| 31 | #include <map> |
| 32 | |
| 33 | using namespace std; |
| 34 | using namespace v8; |
| 35 | |
| 36 | // These interfaces represent an existing request processing interface. |
| 37 | // The idea is to imagine a real application that uses these interfaces |
| 38 | // and then add scripting capabilities that allow you to interact with |
| 39 | // the objects through JavaScript. |
| 40 | |
| 41 | /** |
| 42 | * A simplified http request. |
| 43 | */ |
| 44 | class HttpRequest { |
| 45 | public: |
| 46 | virtual ~HttpRequest() { } |
| 47 | virtual const string& Path() = 0; |
| 48 | virtual const string& Referrer() = 0; |
| 49 | virtual const string& Host() = 0; |
| 50 | virtual const string& UserAgent() = 0; |
| 51 | }; |
| 52 | |
| 53 | /** |
| 54 | * The abstract superclass of http request processors. |
| 55 | */ |
| 56 | class HttpRequestProcessor { |
| 57 | public: |
| 58 | virtual ~HttpRequestProcessor() { } |
| 59 | |
| 60 | // Initialize this processor. The map contains options that control |
| 61 | // how requests should be processed. |
| 62 | virtual bool Initialize(map<string, string>* options, |
| 63 | map<string, string>* output) = 0; |
| 64 | |
| 65 | // Process a single request. |
| 66 | virtual bool Process(HttpRequest* req) = 0; |
| 67 | |
| 68 | static void Log(const char* event); |
| 69 | }; |
| 70 | |
| 71 | /** |
| 72 | * An http request processor that is scriptable using JavaScript. |
| 73 | */ |
| 74 | class JsHttpRequestProcessor : public HttpRequestProcessor { |
| 75 | public: |
| 76 | |
| 77 | // Creates a new processor that processes requests by invoking the |
| 78 | // Process function of the JavaScript script given as an argument. |
| 79 | explicit JsHttpRequestProcessor(Handle<String> script) : script_(script) { } |
| 80 | virtual ~JsHttpRequestProcessor(); |
| 81 | |
| 82 | virtual bool Initialize(map<string, string>* opts, |
| 83 | map<string, string>* output); |
| 84 | virtual bool Process(HttpRequest* req); |
| 85 | |
| 86 | private: |
| 87 | |
| 88 | // Execute the script associated with this processor and extract the |
| 89 | // Process function. Returns true if this succeeded, otherwise false. |
| 90 | bool ExecuteScript(Handle<String> script); |
| 91 | |
| 92 | // Wrap the options and output map in a JavaScript objects and |
| 93 | // install it in the global namespace as 'options' and 'output'. |
| 94 | bool InstallMaps(map<string, string>* opts, map<string, string>* output); |
| 95 | |
| 96 | // Constructs the template that describes the JavaScript wrapper |
| 97 | // type for requests. |
| 98 | static Handle<ObjectTemplate> MakeRequestTemplate(); |
| 99 | static Handle<ObjectTemplate> MakeMapTemplate(); |
| 100 | |
| 101 | // Callbacks that access the individual fields of request objects. |
| 102 | static Handle<Value> GetPath(Local<String> name, const AccessorInfo& info); |
| 103 | static Handle<Value> GetReferrer(Local<String> name, |
| 104 | const AccessorInfo& info); |
| 105 | static Handle<Value> GetHost(Local<String> name, const AccessorInfo& info); |
| 106 | static Handle<Value> GetUserAgent(Local<String> name, |
| 107 | const AccessorInfo& info); |
| 108 | |
| 109 | // Callbacks that access maps |
| 110 | static Handle<Value> MapGet(Local<String> name, const AccessorInfo& info); |
| 111 | static Handle<Value> MapSet(Local<String> name, |
| 112 | Local<Value> value, |
| 113 | const AccessorInfo& info); |
| 114 | |
| 115 | // Utility methods for wrapping C++ objects as JavaScript objects, |
| 116 | // and going back again. |
| 117 | static Handle<Object> WrapMap(map<string, string>* obj); |
| 118 | static map<string, string>* UnwrapMap(Handle<Object> obj); |
| 119 | static Handle<Object> WrapRequest(HttpRequest* obj); |
| 120 | static HttpRequest* UnwrapRequest(Handle<Object> obj); |
| 121 | |
| 122 | Handle<String> script_; |
| 123 | Persistent<Context> context_; |
| 124 | Persistent<Function> process_; |
| 125 | static Persistent<ObjectTemplate> request_template_; |
| 126 | static Persistent<ObjectTemplate> map_template_; |
| 127 | }; |
| 128 | |
| 129 | // ------------------------- |
| 130 | // --- P r o c e s s o r --- |
| 131 | // ------------------------- |
| 132 | |
| 133 | |
| 134 | static Handle<Value> LogCallback(const Arguments& args) { |
| 135 | if (args.Length() < 1) return v8::Undefined(); |
| 136 | HandleScope scope; |
| 137 | Handle<Value> arg = args[0]; |
| 138 | String::Utf8Value value(arg); |
| 139 | HttpRequestProcessor::Log(*value); |
| 140 | return v8::Undefined(); |
| 141 | } |
| 142 | |
| 143 | |
| 144 | // Execute the script and fetch the Process method. |
| 145 | bool JsHttpRequestProcessor::Initialize(map<string, string>* opts, |
| 146 | map<string, string>* output) { |
| 147 | // Create a handle scope to hold the temporary references. |
| 148 | HandleScope handle_scope; |
| 149 | |
| 150 | // Create a template for the global object where we set the |
| 151 | // built-in global functions. |
| 152 | Handle<ObjectTemplate> global = ObjectTemplate::New(); |
| 153 | global->Set(String::New("log"), FunctionTemplate::New(LogCallback)); |
| 154 | |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame^] | 155 | // Each processor gets its own context so different processors don't |
| 156 | // affect each other. Context::New returns a persistent handle which |
| 157 | // is what we need for the reference to remain after we return from |
| 158 | // this method. That persistent handle has to be disposed in the |
| 159 | // destructor. |
| 160 | context_ = Context::New(NULL, global); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 161 | |
| 162 | // Enter the new context so all the following operations take place |
| 163 | // within it. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame^] | 164 | Context::Scope context_scope(context_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 165 | |
| 166 | // Make the options mapping available within the context |
| 167 | if (!InstallMaps(opts, output)) |
| 168 | return false; |
| 169 | |
| 170 | // Compile and run the script |
| 171 | if (!ExecuteScript(script_)) |
| 172 | return false; |
| 173 | |
| 174 | // The script compiled and ran correctly. Now we fetch out the |
| 175 | // Process function from the global object. |
| 176 | Handle<String> process_name = String::New("Process"); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame^] | 177 | Handle<Value> process_val = context_->Global()->Get(process_name); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 178 | |
| 179 | // If there is no Process function, or if it is not a function, |
| 180 | // bail out |
| 181 | if (!process_val->IsFunction()) return false; |
| 182 | |
| 183 | // It is a function; cast it to a Function |
| 184 | Handle<Function> process_fun = Handle<Function>::Cast(process_val); |
| 185 | |
| 186 | // Store the function in a Persistent handle, since we also want |
| 187 | // that to remain after this call returns |
| 188 | process_ = Persistent<Function>::New(process_fun); |
| 189 | |
| 190 | // All done; all went well |
| 191 | return true; |
| 192 | } |
| 193 | |
| 194 | |
| 195 | bool JsHttpRequestProcessor::ExecuteScript(Handle<String> script) { |
| 196 | HandleScope handle_scope; |
| 197 | |
| 198 | // We're just about to compile the script; set up an error handler to |
| 199 | // catch any exceptions the script might throw. |
| 200 | TryCatch try_catch; |
| 201 | |
| 202 | // Compile the script and check for errors. |
| 203 | Handle<Script> compiled_script = Script::Compile(script); |
| 204 | if (compiled_script.IsEmpty()) { |
| 205 | String::Utf8Value error(try_catch.Exception()); |
| 206 | Log(*error); |
| 207 | // The script failed to compile; bail out. |
| 208 | return false; |
| 209 | } |
| 210 | |
| 211 | // Run the script! |
| 212 | Handle<Value> result = compiled_script->Run(); |
| 213 | if (result.IsEmpty()) { |
| 214 | // The TryCatch above is still in effect and will have caught the error. |
| 215 | String::Utf8Value error(try_catch.Exception()); |
| 216 | Log(*error); |
| 217 | // Running the script failed; bail out. |
| 218 | return false; |
| 219 | } |
| 220 | return true; |
| 221 | } |
| 222 | |
| 223 | |
| 224 | bool JsHttpRequestProcessor::InstallMaps(map<string, string>* opts, |
| 225 | map<string, string>* output) { |
| 226 | HandleScope handle_scope; |
| 227 | |
| 228 | // Wrap the map object in a JavaScript wrapper |
| 229 | Handle<Object> opts_obj = WrapMap(opts); |
| 230 | |
| 231 | // Set the options object as a property on the global object. |
| 232 | context_->Global()->Set(String::New("options"), opts_obj); |
| 233 | |
| 234 | Handle<Object> output_obj = WrapMap(output); |
| 235 | context_->Global()->Set(String::New("output"), output_obj); |
| 236 | |
| 237 | return true; |
| 238 | } |
| 239 | |
| 240 | |
| 241 | bool JsHttpRequestProcessor::Process(HttpRequest* request) { |
| 242 | // Create a handle scope to keep the temporary object references. |
| 243 | HandleScope handle_scope; |
| 244 | |
| 245 | // Enter this processor's context so all the remaining operations |
| 246 | // take place there |
| 247 | Context::Scope context_scope(context_); |
| 248 | |
| 249 | // Wrap the C++ request object in a JavaScript wrapper |
| 250 | Handle<Object> request_obj = WrapRequest(request); |
| 251 | |
| 252 | // Set up an exception handler before calling the Process function |
| 253 | TryCatch try_catch; |
| 254 | |
| 255 | // Invoke the process function, giving the global object as 'this' |
| 256 | // and one argument, the request. |
| 257 | const int argc = 1; |
| 258 | Handle<Value> argv[argc] = { request_obj }; |
| 259 | Handle<Value> result = process_->Call(context_->Global(), argc, argv); |
| 260 | if (result.IsEmpty()) { |
| 261 | String::Utf8Value error(try_catch.Exception()); |
| 262 | Log(*error); |
| 263 | return false; |
| 264 | } else { |
| 265 | return true; |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | |
| 270 | JsHttpRequestProcessor::~JsHttpRequestProcessor() { |
| 271 | // Dispose the persistent handles. When noone else has any |
| 272 | // references to the objects stored in the handles they will be |
| 273 | // automatically reclaimed. |
| 274 | context_.Dispose(); |
| 275 | process_.Dispose(); |
| 276 | } |
| 277 | |
| 278 | |
| 279 | Persistent<ObjectTemplate> JsHttpRequestProcessor::request_template_; |
| 280 | Persistent<ObjectTemplate> JsHttpRequestProcessor::map_template_; |
| 281 | |
| 282 | |
| 283 | // ----------------------------------- |
| 284 | // --- A c c e s s i n g M a p s --- |
| 285 | // ----------------------------------- |
| 286 | |
| 287 | // Utility function that wraps a C++ http request object in a |
| 288 | // JavaScript object. |
| 289 | Handle<Object> JsHttpRequestProcessor::WrapMap(map<string, string>* obj) { |
| 290 | // Handle scope for temporary handles. |
| 291 | HandleScope handle_scope; |
| 292 | |
| 293 | // Fetch the template for creating JavaScript map wrappers. |
| 294 | // It only has to be created once, which we do on demand. |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 295 | if (map_template_.IsEmpty()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 296 | Handle<ObjectTemplate> raw_template = MakeMapTemplate(); |
| 297 | map_template_ = Persistent<ObjectTemplate>::New(raw_template); |
| 298 | } |
| 299 | Handle<ObjectTemplate> templ = map_template_; |
| 300 | |
| 301 | // Create an empty map wrapper. |
| 302 | Handle<Object> result = templ->NewInstance(); |
| 303 | |
| 304 | // Wrap the raw C++ pointer in an External so it can be referenced |
| 305 | // from within JavaScript. |
| 306 | Handle<External> map_ptr = External::New(obj); |
| 307 | |
| 308 | // Store the map pointer in the JavaScript wrapper. |
| 309 | result->SetInternalField(0, map_ptr); |
| 310 | |
| 311 | // Return the result through the current handle scope. Since each |
| 312 | // of these handles will go away when the handle scope is deleted |
| 313 | // we need to call Close to let one, the result, escape into the |
| 314 | // outer handle scope. |
| 315 | return handle_scope.Close(result); |
| 316 | } |
| 317 | |
| 318 | |
| 319 | // Utility function that extracts the C++ map pointer from a wrapper |
| 320 | // object. |
| 321 | map<string, string>* JsHttpRequestProcessor::UnwrapMap(Handle<Object> obj) { |
| 322 | Handle<External> field = Handle<External>::Cast(obj->GetInternalField(0)); |
| 323 | void* ptr = field->Value(); |
| 324 | return static_cast<map<string, string>*>(ptr); |
| 325 | } |
| 326 | |
| 327 | |
| 328 | // Convert a JavaScript string to a std::string. To not bother too |
| 329 | // much with string encodings we just use ascii. |
| 330 | string ObjectToString(Local<Value> value) { |
| 331 | String::Utf8Value utf8_value(value); |
| 332 | return string(*utf8_value); |
| 333 | } |
| 334 | |
| 335 | |
| 336 | Handle<Value> JsHttpRequestProcessor::MapGet(Local<String> name, |
| 337 | const AccessorInfo& info) { |
| 338 | // Fetch the map wrapped by this object. |
| 339 | map<string, string>* obj = UnwrapMap(info.Holder()); |
| 340 | |
| 341 | // Convert the JavaScript string to a std::string. |
| 342 | string key = ObjectToString(name); |
| 343 | |
| 344 | // Look up the value if it exists using the standard STL ideom. |
| 345 | map<string, string>::iterator iter = obj->find(key); |
| 346 | |
| 347 | // If the key is not present return an empty handle as signal |
| 348 | if (iter == obj->end()) return Handle<Value>(); |
| 349 | |
| 350 | // Otherwise fetch the value and wrap it in a JavaScript string |
| 351 | const string& value = (*iter).second; |
| 352 | return String::New(value.c_str(), value.length()); |
| 353 | } |
| 354 | |
| 355 | |
| 356 | Handle<Value> JsHttpRequestProcessor::MapSet(Local<String> name, |
| 357 | Local<Value> value_obj, |
| 358 | const AccessorInfo& info) { |
| 359 | // Fetch the map wrapped by this object. |
| 360 | map<string, string>* obj = UnwrapMap(info.Holder()); |
| 361 | |
| 362 | // Convert the key and value to std::strings. |
| 363 | string key = ObjectToString(name); |
| 364 | string value = ObjectToString(value_obj); |
| 365 | |
| 366 | // Update the map. |
| 367 | (*obj)[key] = value; |
| 368 | |
| 369 | // Return the value; any non-empty handle will work. |
| 370 | return value_obj; |
| 371 | } |
| 372 | |
| 373 | |
| 374 | Handle<ObjectTemplate> JsHttpRequestProcessor::MakeMapTemplate() { |
| 375 | HandleScope handle_scope; |
| 376 | |
| 377 | Handle<ObjectTemplate> result = ObjectTemplate::New(); |
| 378 | result->SetInternalFieldCount(1); |
| 379 | result->SetNamedPropertyHandler(MapGet, MapSet); |
| 380 | |
| 381 | // Again, return the result through the current handle scope. |
| 382 | return handle_scope.Close(result); |
| 383 | } |
| 384 | |
| 385 | |
| 386 | // ------------------------------------------- |
| 387 | // --- A c c e s s i n g R e q u e s t s --- |
| 388 | // ------------------------------------------- |
| 389 | |
| 390 | /** |
| 391 | * Utility function that wraps a C++ http request object in a |
| 392 | * JavaScript object. |
| 393 | */ |
| 394 | Handle<Object> JsHttpRequestProcessor::WrapRequest(HttpRequest* request) { |
| 395 | // Handle scope for temporary handles. |
| 396 | HandleScope handle_scope; |
| 397 | |
| 398 | // Fetch the template for creating JavaScript http request wrappers. |
| 399 | // It only has to be created once, which we do on demand. |
| 400 | if (request_template_.IsEmpty()) { |
| 401 | Handle<ObjectTemplate> raw_template = MakeRequestTemplate(); |
| 402 | request_template_ = Persistent<ObjectTemplate>::New(raw_template); |
| 403 | } |
| 404 | Handle<ObjectTemplate> templ = request_template_; |
| 405 | |
| 406 | // Create an empty http request wrapper. |
| 407 | Handle<Object> result = templ->NewInstance(); |
| 408 | |
| 409 | // Wrap the raw C++ pointer in an External so it can be referenced |
| 410 | // from within JavaScript. |
| 411 | Handle<External> request_ptr = External::New(request); |
| 412 | |
| 413 | // Store the request pointer in the JavaScript wrapper. |
| 414 | result->SetInternalField(0, request_ptr); |
| 415 | |
| 416 | // Return the result through the current handle scope. Since each |
| 417 | // of these handles will go away when the handle scope is deleted |
| 418 | // we need to call Close to let one, the result, escape into the |
| 419 | // outer handle scope. |
| 420 | return handle_scope.Close(result); |
| 421 | } |
| 422 | |
| 423 | |
| 424 | /** |
| 425 | * Utility function that extracts the C++ http request object from a |
| 426 | * wrapper object. |
| 427 | */ |
| 428 | HttpRequest* JsHttpRequestProcessor::UnwrapRequest(Handle<Object> obj) { |
| 429 | Handle<External> field = Handle<External>::Cast(obj->GetInternalField(0)); |
| 430 | void* ptr = field->Value(); |
| 431 | return static_cast<HttpRequest*>(ptr); |
| 432 | } |
| 433 | |
| 434 | |
| 435 | Handle<Value> JsHttpRequestProcessor::GetPath(Local<String> name, |
| 436 | const AccessorInfo& info) { |
| 437 | // Extract the C++ request object from the JavaScript wrapper. |
| 438 | HttpRequest* request = UnwrapRequest(info.Holder()); |
| 439 | |
| 440 | // Fetch the path. |
| 441 | const string& path = request->Path(); |
| 442 | |
| 443 | // Wrap the result in a JavaScript string and return it. |
| 444 | return String::New(path.c_str(), path.length()); |
| 445 | } |
| 446 | |
| 447 | |
| 448 | Handle<Value> JsHttpRequestProcessor::GetReferrer(Local<String> name, |
| 449 | const AccessorInfo& info) { |
| 450 | HttpRequest* request = UnwrapRequest(info.Holder()); |
| 451 | const string& path = request->Referrer(); |
| 452 | return String::New(path.c_str(), path.length()); |
| 453 | } |
| 454 | |
| 455 | |
| 456 | Handle<Value> JsHttpRequestProcessor::GetHost(Local<String> name, |
| 457 | const AccessorInfo& info) { |
| 458 | HttpRequest* request = UnwrapRequest(info.Holder()); |
| 459 | const string& path = request->Host(); |
| 460 | return String::New(path.c_str(), path.length()); |
| 461 | } |
| 462 | |
| 463 | |
| 464 | Handle<Value> JsHttpRequestProcessor::GetUserAgent(Local<String> name, |
| 465 | const AccessorInfo& info) { |
| 466 | HttpRequest* request = UnwrapRequest(info.Holder()); |
| 467 | const string& path = request->UserAgent(); |
| 468 | return String::New(path.c_str(), path.length()); |
| 469 | } |
| 470 | |
| 471 | |
| 472 | Handle<ObjectTemplate> JsHttpRequestProcessor::MakeRequestTemplate() { |
| 473 | HandleScope handle_scope; |
| 474 | |
| 475 | Handle<ObjectTemplate> result = ObjectTemplate::New(); |
| 476 | result->SetInternalFieldCount(1); |
| 477 | |
| 478 | // Add accessors for each of the fields of the request. |
| 479 | result->SetAccessor(String::NewSymbol("path"), GetPath); |
| 480 | result->SetAccessor(String::NewSymbol("referrer"), GetReferrer); |
| 481 | result->SetAccessor(String::NewSymbol("host"), GetHost); |
| 482 | result->SetAccessor(String::NewSymbol("userAgent"), GetUserAgent); |
| 483 | |
| 484 | // Again, return the result through the current handle scope. |
| 485 | return handle_scope.Close(result); |
| 486 | } |
| 487 | |
| 488 | |
| 489 | // --- Test --- |
| 490 | |
| 491 | |
| 492 | void HttpRequestProcessor::Log(const char* event) { |
| 493 | printf("Logged: %s\n", event); |
| 494 | } |
| 495 | |
| 496 | |
| 497 | /** |
| 498 | * A simplified http request. |
| 499 | */ |
| 500 | class StringHttpRequest : public HttpRequest { |
| 501 | public: |
| 502 | StringHttpRequest(const string& path, |
| 503 | const string& referrer, |
| 504 | const string& host, |
| 505 | const string& user_agent); |
| 506 | virtual const string& Path() { return path_; } |
| 507 | virtual const string& Referrer() { return referrer_; } |
| 508 | virtual const string& Host() { return host_; } |
| 509 | virtual const string& UserAgent() { return user_agent_; } |
| 510 | private: |
| 511 | string path_; |
| 512 | string referrer_; |
| 513 | string host_; |
| 514 | string user_agent_; |
| 515 | }; |
| 516 | |
| 517 | |
| 518 | StringHttpRequest::StringHttpRequest(const string& path, |
| 519 | const string& referrer, |
| 520 | const string& host, |
| 521 | const string& user_agent) |
| 522 | : path_(path), |
| 523 | referrer_(referrer), |
| 524 | host_(host), |
| 525 | user_agent_(user_agent) { } |
| 526 | |
| 527 | |
| 528 | void ParseOptions(int argc, |
| 529 | char* argv[], |
| 530 | map<string, string>& options, |
| 531 | string* file) { |
| 532 | for (int i = 1; i < argc; i++) { |
| 533 | string arg = argv[i]; |
| 534 | int index = arg.find('=', 0); |
| 535 | if (index == string::npos) { |
| 536 | *file = arg; |
| 537 | } else { |
| 538 | string key = arg.substr(0, index); |
| 539 | string value = arg.substr(index+1); |
| 540 | options[key] = value; |
| 541 | } |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | |
| 546 | // Reads a file into a v8 string. |
| 547 | Handle<String> ReadFile(const string& name) { |
| 548 | FILE* file = fopen(name.c_str(), "rb"); |
| 549 | if (file == NULL) return Handle<String>(); |
| 550 | |
| 551 | fseek(file, 0, SEEK_END); |
| 552 | int size = ftell(file); |
| 553 | rewind(file); |
| 554 | |
| 555 | char* chars = new char[size + 1]; |
| 556 | chars[size] = '\0'; |
| 557 | for (int i = 0; i < size;) { |
| 558 | int read = fread(&chars[i], 1, size - i, file); |
| 559 | i += read; |
| 560 | } |
| 561 | fclose(file); |
| 562 | Handle<String> result = String::New(chars, size); |
| 563 | delete[] chars; |
| 564 | return result; |
| 565 | } |
| 566 | |
| 567 | |
| 568 | const int kSampleSize = 6; |
| 569 | StringHttpRequest kSampleRequests[kSampleSize] = { |
| 570 | StringHttpRequest("/process.cc", "localhost", "google.com", "firefox"), |
| 571 | StringHttpRequest("/", "localhost", "google.net", "firefox"), |
| 572 | StringHttpRequest("/", "localhost", "google.org", "safari"), |
| 573 | StringHttpRequest("/", "localhost", "yahoo.com", "ie"), |
| 574 | StringHttpRequest("/", "localhost", "yahoo.com", "safari"), |
| 575 | StringHttpRequest("/", "localhost", "yahoo.com", "firefox") |
| 576 | }; |
| 577 | |
| 578 | |
| 579 | bool ProcessEntries(HttpRequestProcessor* processor, int count, |
| 580 | StringHttpRequest* reqs) { |
| 581 | for (int i = 0; i < count; i++) { |
| 582 | if (!processor->Process(&reqs[i])) |
| 583 | return false; |
| 584 | } |
| 585 | return true; |
| 586 | } |
| 587 | |
| 588 | |
| 589 | void PrintMap(map<string, string>* m) { |
| 590 | for (map<string, string>::iterator i = m->begin(); i != m->end(); i++) { |
| 591 | pair<string, string> entry = *i; |
| 592 | printf("%s: %s\n", entry.first.c_str(), entry.second.c_str()); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | |
| 597 | int main(int argc, char* argv[]) { |
| 598 | map<string, string> options; |
| 599 | string file; |
| 600 | ParseOptions(argc, argv, options, &file); |
| 601 | if (file.empty()) { |
| 602 | fprintf(stderr, "No script was specified.\n"); |
| 603 | return 1; |
| 604 | } |
| 605 | HandleScope scope; |
| 606 | Handle<String> source = ReadFile(file); |
| 607 | if (source.IsEmpty()) { |
| 608 | fprintf(stderr, "Error reading '%s'.\n", file.c_str()); |
| 609 | return 1; |
| 610 | } |
| 611 | JsHttpRequestProcessor processor(source); |
| 612 | map<string, string> output; |
| 613 | if (!processor.Initialize(&options, &output)) { |
| 614 | fprintf(stderr, "Error initializing processor.\n"); |
| 615 | return 1; |
| 616 | } |
| 617 | if (!ProcessEntries(&processor, kSampleSize, kSampleRequests)) |
| 618 | return 1; |
| 619 | PrintMap(&output); |
| 620 | } |