221 lines
6.6 KiB
C++
221 lines
6.6 KiB
C++
/*
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* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
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*
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* Use of this source code is governed by MIT-like license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef ZLMEDIAKIT_FILEREADER_H
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#define ZLMEDIAKIT_FILEREADER_H
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#include <stdlib.h>
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#include <memory>
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#include "Network/Buffer.h"
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#include "Util/ResourcePool.h"
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#include "Util/logger.h"
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#include "Thread/WorkThreadPool.h"
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#ifndef MIN
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#define MIN(a,b) ((a) < (b) ? (a) : (b) )
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#endif //MIN
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namespace mediakit {
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/**
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* http content部分基类定义
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* Base class definition for http content part
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* [AUTO-TRANSLATED:1eee419a]
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*/
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class HttpBody : public std::enable_shared_from_this<HttpBody>{
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public:
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using Ptr = std::shared_ptr<HttpBody>;
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virtual ~HttpBody() = default;
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/**
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* 剩余数据大小，如果返回-1, 那么就不设置content-length
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* Remaining data size, if -1 is returned, then content-length is not set
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* [AUTO-TRANSLATED:75375ce7]
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*/
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virtual int64_t remainSize() { return 0;};
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/**
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* 读取一定字节数，返回大小可能小于size
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* @param size 请求大小
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* @return 字节对象,如果读完了，那么请返回nullptr
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* Read a certain number of bytes, the returned size may be less than size
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* @param size Request size
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* @return Byte object, if it is read, please return nullptr
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* [AUTO-TRANSLATED:6fd85f91]
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*/
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virtual toolkit::Buffer::Ptr readData(size_t size) { return nullptr;};
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/**
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* 异步请求读取一定字节数，返回大小可能小于size
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* @param size 请求大小
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* @param cb 回调函数
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* Asynchronously request to read a certain number of bytes, the returned size may be less than size
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* @param size Request size
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* @param cb Callback function
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* [AUTO-TRANSLATED:a5304046]
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*/
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virtual void readDataAsync(size_t size,const std::function<void(const toolkit::Buffer::Ptr &buf)> &cb){
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// 由于unix和linux是通过mmap的方式读取文件，所以把读文件操作放在后台线程并不能提高性能 [AUTO-TRANSLATED:59ef443d]
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// Since unix and linux read files through mmap, putting file reading operations in the background thread does not improve performance
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// 反而会由于频繁的线程切换导致性能降低以及延时增加，所以我们默认同步获取文件内容 [AUTO-TRANSLATED:93d2a0b5]
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// On the contrary, frequent thread switching will lead to performance degradation and increased latency, so we get the file content synchronously by default
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// (其实并没有读，拷贝文件数据时在内核态完成文件读) [AUTO-TRANSLATED:6eb98a5d]
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// (Actually, there is no reading, the file data is copied in the kernel state when copying)
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cb(readData(size));
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}
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/**
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* 使用sendfile优化文件发送
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* @param fd socket fd
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* @return 0成功，其他为错误代码
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* Use sendfile to optimize file sending
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* @param fd socket fd
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* @return 0 success, other error codes
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* [AUTO-TRANSLATED:eacc5f98]
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*/
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virtual int sendFile(int fd) {
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return -1;
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}
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};
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/**
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* std::string类型的content
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* std::string type content
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* [AUTO-TRANSLATED:59fc3e5b]
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*/
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class HttpStringBody : public HttpBody{
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public:
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using Ptr = std::shared_ptr<HttpStringBody>;
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HttpStringBody(std::string str);
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int64_t remainSize() override;
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toolkit::Buffer::Ptr readData(size_t size) override ;
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private:
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size_t _offset = 0;
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mutable std::string _str;
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};
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/**
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* Buffer类型的content
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* Buffer type content
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* [AUTO-TRANSLATED:350b9513]
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*/
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class HttpBufferBody : public HttpBody{
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public:
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using Ptr = std::shared_ptr<HttpBufferBody>;
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HttpBufferBody(toolkit::Buffer::Ptr buffer);
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int64_t remainSize() override;
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toolkit::Buffer::Ptr readData(size_t size) override;
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private:
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toolkit::Buffer::Ptr _buffer;
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};
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/**
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* 文件类型的content
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* File type content
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* [AUTO-TRANSLATED:baf9c0f3]
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*/
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class HttpFileBody : public HttpBody {
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public:
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using Ptr = std::shared_ptr<HttpFileBody>;
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/**
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* 构造函数
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* @param file_path 文件路径
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* @param use_mmap 是否使用mmap方式访问文件
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* Constructor
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* @param file_path File path
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* @param use_mmap Whether to use mmap to access the file
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* [AUTO-TRANSLATED:40c85c53]
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*/
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HttpFileBody(const std::string &file_path, bool use_mmap = true);
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/**
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* 设置读取范围
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* @param offset 相对文件头的偏移量
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* @param max_size 最大读取字节数
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* Set the reading range
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* @param offset Offset relative to the file header
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* @param max_size Maximum number of bytes to read
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* [AUTO-TRANSLATED:30532a4e]
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*/
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void setRange(uint64_t offset, uint64_t max_size);
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int64_t remainSize() override;
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toolkit::Buffer::Ptr readData(size_t size) override;
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int sendFile(int fd) override;
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private:
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int64_t _read_to = 0;
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uint64_t _file_offset = 0;
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std::shared_ptr<FILE> _fp;
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std::shared_ptr<char> _map_addr;
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toolkit::ResourcePool<toolkit::BufferRaw> _pool;
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};
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class HttpArgs;
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/**
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* http MultiForm 方式提交的http content
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* http MultiForm way to submit http content
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* [AUTO-TRANSLATED:211a2d8e]
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*/
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class HttpMultiFormBody : public HttpBody {
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public:
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using Ptr = std::shared_ptr<HttpMultiFormBody>;
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/**
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* 构造函数
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* @param args http提交参数列表
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* @param filePath 文件路径
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* @param boundary boundary字符串
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* Constructor
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* @param args http submission parameter list
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* @param filePath File path
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* @param boundary Boundary string
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* [AUTO-TRANSLATED:d093cfa7]
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*/
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HttpMultiFormBody(const HttpArgs &args,const std::string &filePath,const std::string &boundary = "0xKhTmLbOuNdArY");
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int64_t remainSize() override ;
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toolkit::Buffer::Ptr readData(size_t size) override;
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public:
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static std::string multiFormBodyPrefix(const HttpArgs &args,const std::string &boundary,const std::string &fileName);
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static std::string multiFormBodySuffix(const std::string &boundary);
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static std::string multiFormContentType(const std::string &boundary);
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private:
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uint64_t _offset = 0;
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int64_t _totalSize;
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std::string _bodyPrefix;
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std::string _bodySuffix;
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HttpFileBody::Ptr _fileBody;
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};
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}//namespace mediakit
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#endif //ZLMEDIAKIT_FILEREADER_H
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