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76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
#pragma once
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#include <DB/IO/ReadBufferFromHTTP.h>
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#include "ReadHelpers.h"
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#define DEFAULT_REMOTE_READ_BUFFER_CONNECTION_TIMEOUT 1
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#define DEFAULT_REMOTE_READ_BUFFER_RECEIVE_TIMEOUT 1800
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#define DEFAULT_REMOTE_READ_BUFFER_SEND_TIMEOUT 1800
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namespace DB
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{
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/** Позволяет читать файл с удалённого сервера через riod.
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*/
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class RemoteReadBuffer : public ReadBuffer
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{
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private:
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Poco::SharedPtr<ReadBufferFromHTTP> impl;
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public:
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RemoteReadBuffer(
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const std::string & host,
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int port,
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const std::string & path,
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bool compress = true,
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size_t buffer_size = DBMS_DEFAULT_BUFFER_SIZE,
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const Poco::Timespan & connection_timeout = Poco::Timespan(DEFAULT_REMOTE_READ_BUFFER_CONNECTION_TIMEOUT, 0),
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const Poco::Timespan & send_timeout = Poco::Timespan(DEFAULT_REMOTE_READ_BUFFER_SEND_TIMEOUT, 0),
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const Poco::Timespan & receive_timeout = Poco::Timespan(DEFAULT_REMOTE_READ_BUFFER_RECEIVE_TIMEOUT, 0))
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: ReadBuffer(nullptr, 0)
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{
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ReadBufferFromHTTP::Params params = {
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std::make_pair("action", "read"),
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std::make_pair("path", path),
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std::make_pair("compress", (compress ? "true" : "false"))};
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impl = new ReadBufferFromHTTP(host, port, params, buffer_size, connection_timeout, send_timeout, receive_timeout);
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}
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bool nextImpl()
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{
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if (!impl->next())
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return false;
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internal_buffer = impl->buffer();
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working_buffer = internal_buffer;
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return true;
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}
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/// Вернуть список имен файлов в директории.
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static std::vector<std::string> listFiles(
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const std::string & host,
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int port,
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const std::string & path,
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size_t timeout = 0)
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{
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ReadBufferFromHTTP::Params params = {
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std::make_pair("action", "list"),
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std::make_pair("path", path)};
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ReadBufferFromHTTP in(host, port, params, timeout);
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std::vector<std::string> files;
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while (!in.eof())
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{
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std::string s;
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readString(s, in);
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skipWhitespaceIfAny(in);
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files.push_back(s);
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}
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return files;
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}
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};
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}
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