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fetch.cpp
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fetch.cpp
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/*
* Copyright (c) 2019 by flomesh.io
*
* Unless prior written consent has been obtained from the copyright
* owner, the following shall not be allowed.
*
* 1. The distribution of any source codes, header files, make files,
* or libraries of the software.
*
* 2. Disclosure of any source codes pertaining to the software to any
* additional parties.
*
* 3. Alteration or removal of any notices in or on the software or
* within the documentation included within the software.
*
* ALL SOURCE CODE AS WELL AS ALL DOCUMENTATION INCLUDED WITH THIS
* SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION, WITHOUT WARRANTY OF ANY
* KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "fetch.hpp"
#include "context.hpp"
#include "input.hpp"
#include "pipeline.hpp"
#include "message.hpp"
#include "filters/connect.hpp"
#include "filters/demux.hpp"
#include "filters/http.hpp"
#include "filters/tls.hpp"
#include "utils.hpp"
namespace pipy {
auto Fetch::Receiver::clone() -> Filter* {
return new Receiver(m_fetch);
}
void Fetch::Receiver::reset() {
Filter::reset();
m_head = nullptr;
m_body = nullptr;
}
void Fetch::Receiver::process(Event *evt) {
if (auto e = evt->as<MessageStart>()) {
m_head = e->head();
m_body = Data::make();
} else if (auto *data = evt->as<Data>()) {
if (m_body && data->size() > 0) {
m_body->push(*data);
}
} else if (evt->is<MessageEnd>() || evt->is<StreamEnd>()) {
if (m_body) {
m_fetch->on_response(m_head, m_body);
}
m_head = nullptr;
m_body = nullptr;
}
}
void Fetch::Receiver::dump(Dump &d) {
Filter::dump(d);
d.name = "Fetch::Receiver";
}
Fetch::Fetch(pjs::Str *host, const Options &options)
: m_module(new Module())
, m_host(host)
{
m_mux_grouper = pjs::Method::make(
"", [this](pjs::Context &, pjs::Object *, pjs::Value &ret) {
ret.set(m_mux_group);
}
);
Connect::Options connect_options(options);
connect_options.on_state_changed = [this](Outbound *ob) {
m_outbound = ob;
};
auto *ppl_connect = PipelineLayout::make(m_module);
ppl_connect->append(new Connect(m_host.get(), connect_options));
if (options.tls) {
tls::Client::Options opts;
opts.trusted = options.trusted;
if (options.cert) {
opts.certificate = pjs::Object::make();
opts.certificate->set("cert", options.cert.get());
opts.certificate->set("key", options.key.get());
}
std::string sni;
int port;
utils::get_host_port(host->str(), sni, port);
opts.sni = pjs::Str::make(sni);
auto *ppl_tls = PipelineLayout::make(m_module);
ppl_tls->append(new tls::Client(opts))->add_sub_pipeline(ppl_connect);
ppl_connect = ppl_tls;
}
m_ppl = PipelineLayout::make(m_module);
m_ppl->append(new http::Mux(pjs::Function::make(m_mux_grouper)))->add_sub_pipeline(ppl_connect);
m_ppl->append(new Receiver(this));
}
Fetch::Fetch(const std::string &host, const Options &options)
: Fetch(pjs::Str::make(host), options)
{
}
Fetch::~Fetch() {
m_module->shutdown();
}
static const pjs::Ref<pjs::Str> s_HEAD(pjs::Str::make("HEAD"));
static const pjs::Ref<pjs::Str> s_GET(pjs::Str::make("GET"));
static const pjs::Ref<pjs::Str> s_PUT(pjs::Str::make("PUT"));
static const pjs::Ref<pjs::Str> s_POST(pjs::Str::make("POST"));
static const pjs::Ref<pjs::Str> s_PATCH(pjs::Str::make("PATCH"));
static const pjs::Ref<pjs::Str> s_DELETE(pjs::Str::make("DELETE"));
static const pjs::Ref<pjs::Str> s_Host(pjs::Str::make("Host"));
void Fetch::fetch(
Method method,
pjs::Str *path,
pjs::Object *headers,
pipy::Data *body,
const std::function<void(http::ResponseHead*, pipy::Data*)> &cb
) {
if (!m_mux_group) m_mux_group = pjs::Object::make();
if (!headers) headers = pjs::Object::make();
headers->set(s_Host, m_host.get());
auto head = http::RequestHead::make();
head->path = path;
head->headers = headers;
switch (method) {
case HEAD: head->method = s_HEAD; break;
case GET: head->method = s_GET; break;
case PUT: head->method = s_PUT; break;
case POST: head->method = s_POST; break;
case PATCH: head->method = s_PATCH; break;
case DELETE: head->method = s_DELETE; break;
}
m_request_queue.emplace_back();
auto &req = m_request_queue.back();
req.method = method;
req.message = Message::make(head, body);
req.cb = cb;
pump();
}
void Fetch::close() {
m_mux_group = nullptr;
m_pipeline = nullptr;
m_current_request = nullptr;
m_request_queue.clear();
}
void Fetch::pump() {
if (!m_current_request && !m_request_queue.empty()) {
m_current_request = &m_request_queue.front();
auto msg = m_current_request->message;
Net::current().post(
[=]() {
InputContext ic;
m_pipeline = Pipeline::make(m_ppl, m_ppl->new_context());
msg->write(m_pipeline->input());
}
);
}
}
bool Fetch::is_bodiless_response() {
if (m_current_request) {
return m_current_request->method == HEAD;
} else {
return false;
}
}
void Fetch::on_response(http::ResponseHead *head, pipy::Data *body) {
if (m_current_request) {
auto cb = m_current_request->cb;
m_current_request = nullptr;
m_request_queue.pop_front();
cb(head, body);
pump();
}
}
} // namespace pipy