Added HttpClient class.

src/base/net/http/HttpClient.cpp

@@ -0,0 +1,198 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2014-2019 heapwolf    <https://github.com/heapwolf>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <sstream>
+
+
+#include "3rdparty/http-parser/http_parser.h"
+#include "base/io/log/Log.h"
+#include "base/net/dns/Dns.h"
+#include "base/net/http/HttpClient.h"
+#include "base/tools/Baton.h"
+#include "common/Platform.h"
+
+
+namespace xmrig {
+
+static const char *kCRLF = "\r\n";
+
+
+class WriteBaton : public Baton<uv_write_t>
+{
+public:
+    inline WriteBaton(const std::stringstream &ss, std::string &&body) :
+        m_body(body),
+        m_header(ss.str())
+    {
+        bufs[0].len  = m_header.size();
+        bufs[0].base = const_cast<char *>(m_header.c_str());
+
+        if (!m_body.empty()) {
+            bufs[1].len  = m_body.size();
+            bufs[1].base = const_cast<char *>(m_body.c_str());
+        }
+        else {
+            bufs[1].base = nullptr;
+            bufs[1].len  = 0;
+        }
+    }
+
+
+    inline size_t count() const                      { return bufs[1].base == nullptr ? 1 : 2; }
+    inline size_t size() const                       { return bufs[0].len + bufs[1].len; }
+    inline static void onWrite(uv_write_t *req, int) { delete reinterpret_cast<WriteBaton *>(req->data); }
+
+
+    uv_buf_t bufs[2];
+
+private:
+    std::string m_body;
+    std::string m_header;
+};
+
+
+} // namespace xmrig
+
+
+xmrig::HttpClient::HttpClient(const String &host, uint16_t port, int method, const String &url, IHttpListener *listener, const char *data, size_t size) :
+    HttpContext(HTTP_RESPONSE, listener),
+    m_port(port)
+{
+    this->method = method;
+    this->url    = url;
+
+    if (data) {
+        body = size ? std::string(data, size) : data;
+    }
+
+    m_dns = new Dns(this);
+
+    status = m_dns->resolve(host);
+}
+
+
+xmrig::HttpClient::~HttpClient()
+{
+    delete m_dns;
+}
+
+
+void xmrig::HttpClient::onResolved(const Dns &dns, int status)
+{
+    this->status = status;
+
+    if (status < 0 && dns.isEmpty()) {
+        LOG_ERR("[%s:%d] DNS error: \"%s\"", dns.host().data(), m_port, uv_strerror(status));
+
+        return;
+    }
+
+    sockaddr *addr = dns.get().addr(m_port);
+
+    uv_connect_t *req = new uv_connect_t;
+    req->data = this;
+
+    uv_tcp_connect(req, m_tcp, addr, onConnect);
+}
+
+
+void xmrig::HttpClient::send()
+{
+    headers.insert({ "Host",       m_dns->host().data() });
+    headers.insert({ "Connection", "close" });
+    headers.insert({ "User-Agent", Platform::userAgent() });
+
+    if (body.size()) {
+        headers.insert({ "Content-Length", std::to_string(body.size()) });
+    }
+
+    std::stringstream ss;
+    ss << http_method_str(static_cast<http_method>(method)) << " " << url << " HTTP/1.1" << kCRLF;
+
+    for (auto &header : headers) {
+        ss << header.first << ": " << header.second << kCRLF;
+    }
+
+    ss << kCRLF;
+
+    headers.clear();
+
+    WriteBaton *baton = new WriteBaton(ss, std::move(body));
+    uv_write(&baton->req, stream(), baton->bufs, baton->count(), WriteBaton::onWrite);
+}
+
+
+void xmrig::HttpClient::onConnect(uv_connect_t *req, int status)
+{
+    HttpClient *client = static_cast<HttpClient *>(req->data);
+    if (!client) {
+        delete req;
+        return;
+    }
+
+    if (status < 0) {
+        LOG_ERR("[%s:%d] connect error: \"%s\"", client->m_dns->host().data(), client->m_port, uv_strerror(status));
+
+        delete req;
+        client->close();
+        return;
+    }
+
+    uv_read_start(client->stream(),
+        [](uv_handle_t *, size_t suggested_size, uv_buf_t *buf)
+        {
+            buf->base = new char[suggested_size];
+
+#           ifdef _WIN32
+            buf->len = static_cast<unsigned int>(suggested_size);
+#           else
+            buf->len = suggested_size;
+#           endif
+        },
+        [](uv_stream_t *tcp, ssize_t nread, const uv_buf_t *buf)
+        {
+            HttpClient *client = static_cast<HttpClient*>(tcp->data);
+
+            if (nread >= 0) {
+                const size_t size   = static_cast<size_t>(nread);
+                const size_t parsed = client->parse(buf->base, size);
+
+                if (parsed < size) {
+                    client->close();
+                }
+            } else {
+                if (nread != UV_EOF) {
+                    LOG_ERR("[%s:%d] read error: \"%s\"", client->m_dns->host().data(), client->m_port, uv_strerror(static_cast<int>(nread)));
+                }
+
+                client->close();
+            }
+
+            delete [] buf->base;
+        });
+
+    client->send();
+}