113 lines
3.9 KiB
C++
113 lines
3.9 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/net/HttpChunkedByteFlow.h"
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#include "td/net/HttpContentLengthByteFlow.h"
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#include "td/net/HttpQuery.h"
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#include "td/utils/buffer.h"
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#include "td/utils/ByteFlow.h"
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#include "td/utils/common.h"
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#include "td/utils/GzipByteFlow.h"
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#include "td/utils/port/FileFd.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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#include "td/utils/StringBuilder.h"
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#include <limits>
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namespace td {
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class HttpReader {
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public:
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void init(ChainBufferReader *input, size_t max_post_size = std::numeric_limits<size_t>::max(),
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size_t max_files = 100);
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Result<size_t> read_next(HttpQuery *query) TD_WARN_UNUSED_RESULT; // TODO move query to init
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HttpReader() = default;
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HttpReader(const HttpReader &other) = delete;
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HttpReader &operator=(const HttpReader &other) = delete;
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HttpReader(HttpReader &&other) = delete;
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HttpReader &operator=(HttpReader &&other) = delete;
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~HttpReader() {
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if (!temp_file_.empty()) {
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temp_file_.close();
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}
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}
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static void delete_temp_file(CSlice file_name);
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private:
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size_t max_post_size_ = 0;
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size_t max_files_ = 0;
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enum class State { ReadHeaders, ReadContent, ReadContentToFile, ReadArgs, ReadMultipartFormData };
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State state_ = State::ReadHeaders;
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size_t headers_read_length_ = 0;
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size_t content_length_ = 0;
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ChainBufferReader *input_ = nullptr;
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ByteFlowSource flow_source_;
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HttpChunkedByteFlow chunked_flow_;
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GzipByteFlow gzip_flow_;
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HttpContentLengthByteFlow content_length_flow_;
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ByteFlowSink flow_sink_;
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ChainBufferReader *content_ = nullptr;
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HttpQuery *query_ = nullptr;
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Slice transfer_encoding_;
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Slice content_encoding_;
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Slice content_type_;
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string content_type_lowercased_;
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size_t total_parameters_length_ = 0;
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size_t total_headers_length_ = 0;
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string boundary_;
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size_t form_data_read_length_ = 0;
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size_t form_data_skipped_length_ = 0;
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enum class FormDataParseState : int32 {
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SkipPrologue,
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ReadPartHeaders,
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ReadPartValue,
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ReadFile,
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CheckForLastBoundary,
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SkipEpilogue
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};
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FormDataParseState form_data_parse_state_ = FormDataParseState::SkipPrologue;
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MutableSlice field_name_;
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string file_field_name_;
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string field_content_type_;
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string file_name_;
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bool has_file_name_ = false;
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FileFd temp_file_;
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string temp_file_name_;
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int64 file_size_ = 0;
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Result<size_t> split_header() TD_WARN_UNUSED_RESULT;
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void process_header(MutableSlice header_name, MutableSlice header_value);
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Result<bool> parse_multipart_form_data() TD_WARN_UNUSED_RESULT;
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Status parse_url(MutableSlice url) TD_WARN_UNUSED_RESULT;
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Status parse_parameters(MutableSlice parameters) TD_WARN_UNUSED_RESULT;
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Status parse_json_parameters(MutableSlice parameters) TD_WARN_UNUSED_RESULT;
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Status parse_head(MutableSlice head) TD_WARN_UNUSED_RESULT;
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Status open_temp_file(CSlice desired_file_name) TD_WARN_UNUSED_RESULT;
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Status try_open_temp_file(Slice directory_name, CSlice desired_file_name) TD_WARN_UNUSED_RESULT;
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Status save_file_part(BufferSlice &&file_part) TD_WARN_UNUSED_RESULT;
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void close_temp_file();
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void clean_temporary_file();
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static constexpr size_t MAX_CONTENT_SIZE = std::numeric_limits<int32>::max(); // Some reasonable limit
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static constexpr size_t MAX_TOTAL_PARAMETERS_LENGTH = 1 << 20; // Some reasonable limit
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static constexpr size_t MAX_TOTAL_HEADERS_LENGTH = 1 << 18; // Some reasonable limit
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static constexpr size_t MAX_BOUNDARY_LENGTH = 70; // As defined by RFC1341
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static constexpr int64 MAX_FILE_SIZE = 2000 << 20; // Telegram server file size limit
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static constexpr const char TEMP_DIRECTORY_PREFIX[] = "tdlib-server-tmp";
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};
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} // namespace td
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