mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-26 12:37:09 +08:00
149 lines
4.1 KiB
C++
149 lines
4.1 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT 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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using namespace std;
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using namespace toolkit;
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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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*/
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class HttpBody : public std::enable_shared_from_this<HttpBody>{
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public:
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typedef std::shared_ptr<HttpBody> Ptr;
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HttpBody(){}
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virtual ~HttpBody(){}
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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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*/
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virtual ssize_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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*/
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virtual 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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*/
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virtual void readDataAsync(size_t size,const function<void(const 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
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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
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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)
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cb(readData(size));
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}
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};
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/**
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* string类型的content
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*/
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class HttpStringBody : public HttpBody{
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public:
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typedef std::shared_ptr<HttpStringBody> Ptr;
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HttpStringBody(const string &str);
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virtual ~HttpStringBody(){}
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ssize_t remainSize() override;
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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 string _str;
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};
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/**
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* 文件类型的content
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*/
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class HttpFileBody : public HttpBody{
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public:
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typedef std::shared_ptr<HttpFileBody> Ptr;
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/**
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* 构造函数
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* @param fp 文件句柄，文件的偏移量必须为0
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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，未判断是否大于文件真实大小
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*/
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HttpFileBody(const std::shared_ptr<FILE> &fp,size_t offset,size_t max_size);
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HttpFileBody(const string &file_path);
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~HttpFileBody(){};
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ssize_t remainSize() override ;
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Buffer::Ptr readData(size_t size) override;
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private:
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void init(const std::shared_ptr<FILE> &fp,size_t offset,size_t max_size);
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private:
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size_t _max_size;
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size_t _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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ResourcePool<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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*/
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class HttpMultiFormBody : public HttpBody {
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public:
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typedef std::shared_ptr<HttpMultiFormBody> Ptr;
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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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*/
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HttpMultiFormBody(const HttpArgs &args,const string &filePath,const string &boundary = "0xKhTmLbOuNdArY");
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virtual ~HttpMultiFormBody(){}
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ssize_t remainSize() override ;
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Buffer::Ptr readData(size_t size) override;
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public:
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static string multiFormBodyPrefix(const HttpArgs &args,const string &boundary,const string &fileName);
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static string multiFormBodySuffix(const string &boundary);
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static size_t fileSize(FILE *fp);
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static string multiFormContentType(const string &boundary);
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private:
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size_t _offset = 0;
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size_t _totalSize;
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string _bodyPrefix;
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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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