mirror of
https://github.com/zebrajr/node.git
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b33a47ef47
Weak handles put strain on the garbage collector and the parser handle doesn't need to be weak in the first place. This change should improve GC times on busy servers a little. Reviewed-by: Trevor Norris <trev.norris@gmail.com>
617 lines
17 KiB
C++
617 lines
17 KiB
C++
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "node.h"
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#include "node_buffer.h"
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#include "node_http_parser.h"
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#include "base-object.h"
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#include "base-object-inl.h"
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#include "env.h"
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#include "env-inl.h"
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#include "util.h"
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#include "util-inl.h"
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#include "v8.h"
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#include <stdlib.h> // free()
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#include <string.h> // strdup()
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#if defined(_MSC_VER)
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#define strcasecmp _stricmp
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#else
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#include <strings.h> // strcasecmp()
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#endif
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// This is a binding to http_parser (https://github.com/joyent/http-parser)
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// The goal is to decouple sockets from parsing for more javascript-level
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// agility. A Buffer is read from a socket and passed to parser.execute().
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// The parser then issues callbacks with slices of the data
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// parser.onMessageBegin
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// parser.onPath
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// parser.onBody
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// ...
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// No copying is performed when slicing the buffer, only small reference
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// allocations.
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namespace node {
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using v8::Array;
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using v8::Context;
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using v8::Exception;
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using v8::Function;
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using v8::FunctionCallbackInfo;
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using v8::FunctionTemplate;
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using v8::Handle;
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using v8::HandleScope;
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using v8::Integer;
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using v8::Local;
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using v8::Object;
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using v8::String;
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using v8::Uint32;
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using v8::Value;
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const uint32_t kOnHeaders = 0;
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const uint32_t kOnHeadersComplete = 1;
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const uint32_t kOnBody = 2;
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const uint32_t kOnMessageComplete = 3;
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#define HTTP_CB(name) \
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static int name(http_parser* p_) { \
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Parser* self = ContainerOf(&Parser::parser_, p_); \
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return self->name##_(); \
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} \
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int name##_()
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#define HTTP_DATA_CB(name) \
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static int name(http_parser* p_, const char* at, size_t length) { \
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Parser* self = ContainerOf(&Parser::parser_, p_); \
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return self->name##_(at, length); \
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} \
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int name##_(const char* at, size_t length)
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// helper class for the Parser
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struct StringPtr {
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StringPtr() {
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on_heap_ = false;
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Reset();
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}
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~StringPtr() {
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Reset();
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}
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// If str_ does not point to a heap string yet, this function makes it do
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// so. This is called at the end of each http_parser_execute() so as not
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// to leak references. See issue #2438 and test-http-parser-bad-ref.js.
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void Save() {
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if (!on_heap_ && size_ > 0) {
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char* s = new char[size_];
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memcpy(s, str_, size_);
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str_ = s;
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on_heap_ = true;
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}
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}
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void Reset() {
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if (on_heap_) {
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delete[] str_;
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on_heap_ = false;
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}
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str_ = NULL;
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size_ = 0;
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}
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void Update(const char* str, size_t size) {
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if (str_ == NULL)
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str_ = str;
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else if (on_heap_ || str_ + size_ != str) {
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// Non-consecutive input, make a copy on the heap.
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// TODO(bnoordhuis) Use slab allocation, O(n) allocs is bad.
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char* s = new char[size_ + size];
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memcpy(s, str_, size_);
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memcpy(s + size_, str, size);
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if (on_heap_)
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delete[] str_;
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else
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on_heap_ = true;
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str_ = s;
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}
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size_ += size;
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}
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Local<String> ToString(Environment* env) const {
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if (str_)
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return OneByteString(env->isolate(), str_, size_);
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else
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return String::Empty(env->isolate());
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}
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const char* str_;
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bool on_heap_;
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size_t size_;
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};
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class Parser : public BaseObject {
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public:
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Parser(Environment* env, Local<Object> wrap, enum http_parser_type type)
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: BaseObject(env, wrap),
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current_buffer_len_(0),
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current_buffer_data_(NULL) {
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Wrap(object(), this);
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Init(type);
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}
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~Parser() {
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ClearWrap(object());
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persistent().Reset();
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}
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HTTP_CB(on_message_begin) {
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num_fields_ = num_values_ = 0;
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url_.Reset();
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status_message_.Reset();
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return 0;
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}
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HTTP_DATA_CB(on_url) {
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url_.Update(at, length);
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return 0;
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}
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HTTP_DATA_CB(on_status) {
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status_message_.Update(at, length);
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return 0;
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}
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HTTP_DATA_CB(on_header_field) {
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if (num_fields_ == num_values_) {
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// start of new field name
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num_fields_++;
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if (num_fields_ == ARRAY_SIZE(fields_)) {
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// ran out of space - flush to javascript land
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Flush();
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num_fields_ = 1;
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num_values_ = 0;
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}
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fields_[num_fields_ - 1].Reset();
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}
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assert(num_fields_ < static_cast<int>(ARRAY_SIZE(fields_)));
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assert(num_fields_ == num_values_ + 1);
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fields_[num_fields_ - 1].Update(at, length);
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return 0;
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}
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HTTP_DATA_CB(on_header_value) {
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if (num_values_ != num_fields_) {
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// start of new header value
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num_values_++;
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values_[num_values_ - 1].Reset();
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}
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assert(num_values_ < static_cast<int>(ARRAY_SIZE(values_)));
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assert(num_values_ == num_fields_);
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values_[num_values_ - 1].Update(at, length);
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return 0;
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}
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HTTP_CB(on_headers_complete) {
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Local<Object> obj = object();
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Local<Value> cb = obj->Get(kOnHeadersComplete);
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if (!cb->IsFunction())
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return 0;
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Local<Object> message_info = Object::New(env()->isolate());
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if (have_flushed_) {
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// Slow case, flush remaining headers.
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Flush();
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} else {
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// Fast case, pass headers and URL to JS land.
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message_info->Set(env()->headers_string(), CreateHeaders());
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if (parser_.type == HTTP_REQUEST)
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message_info->Set(env()->url_string(), url_.ToString(env()));
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}
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num_fields_ = num_values_ = 0;
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// METHOD
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if (parser_.type == HTTP_REQUEST) {
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message_info->Set(env()->method_string(),
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Uint32::NewFromUnsigned(env()->isolate(),
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parser_.method));
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}
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// STATUS
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if (parser_.type == HTTP_RESPONSE) {
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message_info->Set(env()->status_code_string(),
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Integer::New(env()->isolate(), parser_.status_code));
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message_info->Set(env()->status_message_string(),
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status_message_.ToString(env()));
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}
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// VERSION
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message_info->Set(env()->version_major_string(),
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Integer::New(env()->isolate(), parser_.http_major));
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message_info->Set(env()->version_minor_string(),
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Integer::New(env()->isolate(), parser_.http_minor));
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message_info->Set(env()->should_keep_alive_string(),
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http_should_keep_alive(&parser_) ?
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True(env()->isolate()) : False(env()->isolate()));
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message_info->Set(env()->upgrade_string(),
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parser_.upgrade ? True(env()->isolate())
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: False(env()->isolate()));
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Local<Value> argv[1] = { message_info };
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Local<Value> head_response =
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cb.As<Function>()->Call(obj, ARRAY_SIZE(argv), argv);
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if (head_response.IsEmpty()) {
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got_exception_ = true;
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return -1;
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}
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return head_response->IsTrue() ? 1 : 0;
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}
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HTTP_DATA_CB(on_body) {
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HandleScope scope(env()->isolate());
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Local<Object> obj = object();
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Local<Value> cb = obj->Get(kOnBody);
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if (!cb->IsFunction())
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return 0;
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Local<Value> argv[3] = {
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current_buffer_,
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Integer::NewFromUnsigned(env()->isolate(), at - current_buffer_data_),
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Integer::NewFromUnsigned(env()->isolate(), length)
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};
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Local<Value> r = cb.As<Function>()->Call(obj, ARRAY_SIZE(argv), argv);
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if (r.IsEmpty()) {
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got_exception_ = true;
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return -1;
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}
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return 0;
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}
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HTTP_CB(on_message_complete) {
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HandleScope scope(env()->isolate());
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if (num_fields_)
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Flush(); // Flush trailing HTTP headers.
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Local<Object> obj = object();
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Local<Value> cb = obj->Get(kOnMessageComplete);
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if (!cb->IsFunction())
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return 0;
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Local<Value> r = cb.As<Function>()->Call(obj, 0, NULL);
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if (r.IsEmpty()) {
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got_exception_ = true;
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return -1;
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}
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return 0;
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}
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static void New(const FunctionCallbackInfo<Value>& args) {
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HandleScope handle_scope(args.GetIsolate());
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Environment* env = Environment::GetCurrent(args.GetIsolate());
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http_parser_type type =
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static_cast<http_parser_type>(args[0]->Int32Value());
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assert(type == HTTP_REQUEST || type == HTTP_RESPONSE);
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new Parser(env, args.This(), type);
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}
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static void Close(const FunctionCallbackInfo<Value>& args) {
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HandleScope handle_scope(args.GetIsolate());
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Parser* parser = Unwrap<Parser>(args.Holder());
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delete parser;
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}
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void Save() {
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url_.Save();
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status_message_.Save();
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for (int i = 0; i < num_fields_; i++) {
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fields_[i].Save();
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}
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for (int i = 0; i < num_values_; i++) {
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values_[i].Save();
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}
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}
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// var bytesParsed = parser->execute(buffer);
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static void Execute(const FunctionCallbackInfo<Value>& args) {
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HandleScope handle_scope(args.GetIsolate());
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Environment* env = Environment::GetCurrent(args.GetIsolate());
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Parser* parser = Unwrap<Parser>(args.Holder());
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assert(parser->current_buffer_.IsEmpty());
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assert(parser->current_buffer_len_ == 0);
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assert(parser->current_buffer_data_ == NULL);
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assert(Buffer::HasInstance(args[0]) == true);
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Local<Object> buffer_obj = args[0].As<Object>();
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char* buffer_data = Buffer::Data(buffer_obj);
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size_t buffer_len = Buffer::Length(buffer_obj);
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// This is a hack to get the current_buffer to the callbacks with the least
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// amount of overhead. Nothing else will run while http_parser_execute()
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// runs, therefore this pointer can be set and used for the execution.
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parser->current_buffer_ = buffer_obj;
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parser->current_buffer_len_ = buffer_len;
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parser->current_buffer_data_ = buffer_data;
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parser->got_exception_ = false;
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size_t nparsed =
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http_parser_execute(&parser->parser_, &settings, buffer_data, buffer_len);
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parser->Save();
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// Unassign the 'buffer_' variable
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parser->current_buffer_.Clear();
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parser->current_buffer_len_ = 0;
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parser->current_buffer_data_ = NULL;
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// If there was an exception in one of the callbacks
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if (parser->got_exception_)
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return;
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Local<Integer> nparsed_obj = Integer::New(env->isolate(), nparsed);
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// If there was a parse error in one of the callbacks
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// TODO(bnoordhuis) What if there is an error on EOF?
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if (!parser->parser_.upgrade && nparsed != buffer_len) {
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enum http_errno err = HTTP_PARSER_ERRNO(&parser->parser_);
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Local<Value> e = Exception::Error(env->parse_error_string());
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Local<Object> obj = e->ToObject();
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obj->Set(env->bytes_parsed_string(), nparsed_obj);
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obj->Set(env->code_string(),
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OneByteString(env->isolate(), http_errno_name(err)));
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args.GetReturnValue().Set(e);
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} else {
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args.GetReturnValue().Set(nparsed_obj);
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}
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}
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static void Finish(const FunctionCallbackInfo<Value>& args) {
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Environment* env = Environment::GetCurrent(args.GetIsolate());
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HandleScope scope(env->isolate());
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Parser* parser = Unwrap<Parser>(args.Holder());
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assert(parser->current_buffer_.IsEmpty());
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parser->got_exception_ = false;
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int rv = http_parser_execute(&(parser->parser_), &settings, NULL, 0);
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if (parser->got_exception_)
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return;
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if (rv != 0) {
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enum http_errno err = HTTP_PARSER_ERRNO(&parser->parser_);
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Local<Value> e = env->parse_error_string();
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Local<Object> obj = e->ToObject();
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obj->Set(env->bytes_parsed_string(), Integer::New(env->isolate(), 0));
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obj->Set(env->code_string(),
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OneByteString(env->isolate(), http_errno_name(err)));
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args.GetReturnValue().Set(e);
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}
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}
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static void Reinitialize(const FunctionCallbackInfo<Value>& args) {
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HandleScope handle_scope(args.GetIsolate());
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Environment* env = Environment::GetCurrent(args.GetIsolate());
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http_parser_type type =
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static_cast<http_parser_type>(args[0]->Int32Value());
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assert(type == HTTP_REQUEST || type == HTTP_RESPONSE);
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Parser* parser = Unwrap<Parser>(args.Holder());
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// Should always be called from the same context.
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assert(env == parser->env());
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parser->Init(type);
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}
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template <bool should_pause>
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static void Pause(const FunctionCallbackInfo<Value>& args) {
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HandleScope handle_scope(args.GetIsolate());
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Environment* env = Environment::GetCurrent(args.GetIsolate());
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Parser* parser = Unwrap<Parser>(args.Holder());
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// Should always be called from the same context.
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assert(env == parser->env());
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http_parser_pause(&parser->parser_, should_pause);
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}
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private:
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Local<Array> CreateHeaders() {
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// num_values_ is either -1 or the entry # of the last header
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// so num_values_ == 0 means there's a single header
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Local<Array> headers = Array::New(env()->isolate(), 2 * num_values_);
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for (int i = 0; i < num_values_; ++i) {
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headers->Set(2 * i, fields_[i].ToString(env()));
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headers->Set(2 * i + 1, values_[i].ToString(env()));
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}
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return headers;
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}
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// spill headers and request path to JS land
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void Flush() {
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HandleScope scope(env()->isolate());
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Local<Object> obj = object();
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Local<Value> cb = obj->Get(kOnHeaders);
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if (!cb->IsFunction())
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return;
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Local<Value> argv[2] = {
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CreateHeaders(),
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url_.ToString(env())
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};
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Local<Value> r = cb.As<Function>()->Call(obj, ARRAY_SIZE(argv), argv);
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if (r.IsEmpty())
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got_exception_ = true;
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url_.Reset();
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have_flushed_ = true;
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}
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void Init(enum http_parser_type type) {
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http_parser_init(&parser_, type);
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url_.Reset();
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status_message_.Reset();
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num_fields_ = 0;
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num_values_ = 0;
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have_flushed_ = false;
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got_exception_ = false;
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}
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http_parser parser_;
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StringPtr fields_[32]; // header fields
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StringPtr values_[32]; // header values
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StringPtr url_;
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StringPtr status_message_;
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int num_fields_;
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int num_values_;
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bool have_flushed_;
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bool got_exception_;
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Local<Object> current_buffer_;
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size_t current_buffer_len_;
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char* current_buffer_data_;
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static const struct http_parser_settings settings;
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};
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const struct http_parser_settings Parser::settings = {
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Parser::on_message_begin,
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Parser::on_url,
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Parser::on_status,
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Parser::on_header_field,
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Parser::on_header_value,
|
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Parser::on_headers_complete,
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Parser::on_body,
|
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Parser::on_message_complete
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|
};
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|
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void InitHttpParser(Handle<Object> target,
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Handle<Value> unused,
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Handle<Context> context,
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void* priv) {
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Environment* env = Environment::GetCurrent(context);
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Local<FunctionTemplate> t = FunctionTemplate::New(env->isolate(),
|
|
Parser::New);
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|
t->InstanceTemplate()->SetInternalFieldCount(1);
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|
t->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "HTTPParser"));
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|
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t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "REQUEST"),
|
|
Integer::New(env->isolate(), HTTP_REQUEST));
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|
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "RESPONSE"),
|
|
Integer::New(env->isolate(), HTTP_RESPONSE));
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|
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kOnHeaders"),
|
|
Integer::NewFromUnsigned(env->isolate(), kOnHeaders));
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|
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kOnHeadersComplete"),
|
|
Integer::NewFromUnsigned(env->isolate(), kOnHeadersComplete));
|
|
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kOnBody"),
|
|
Integer::NewFromUnsigned(env->isolate(), kOnBody));
|
|
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kOnMessageComplete"),
|
|
Integer::NewFromUnsigned(env->isolate(), kOnMessageComplete));
|
|
|
|
Local<Array> methods = Array::New(env->isolate());
|
|
#define V(num, name, string) \
|
|
methods->Set(num, FIXED_ONE_BYTE_STRING(env->isolate(), #string));
|
|
HTTP_METHOD_MAP(V)
|
|
#undef V
|
|
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "methods"), methods);
|
|
|
|
NODE_SET_PROTOTYPE_METHOD(t, "close", Parser::Close);
|
|
NODE_SET_PROTOTYPE_METHOD(t, "execute", Parser::Execute);
|
|
NODE_SET_PROTOTYPE_METHOD(t, "finish", Parser::Finish);
|
|
NODE_SET_PROTOTYPE_METHOD(t, "reinitialize", Parser::Reinitialize);
|
|
NODE_SET_PROTOTYPE_METHOD(t, "pause", Parser::Pause<true>);
|
|
NODE_SET_PROTOTYPE_METHOD(t, "resume", Parser::Pause<false>);
|
|
|
|
target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "HTTPParser"),
|
|
t->GetFunction());
|
|
}
|
|
|
|
} // namespace node
|
|
|
|
NODE_MODULE_CONTEXT_AWARE_BUILTIN(http_parser, node::InitHttpParser)
|