mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-30 07:26:53 +08:00
328 lines
9.1 KiB
C++
328 lines
9.1 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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#include <csignal>
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#include <tuple>
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#ifndef _WIN32
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#include <sys/mman.h>
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#endif
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#if defined(__linux__) || defined(__linux)
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#include <sys/sendfile.h>
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#endif
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#include "Util/File.h"
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#include "Util/logger.h"
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#include "Util/onceToken.h"
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#include "Util/util.h"
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#include "Util/uv_errno.h"
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#include "HttpBody.h"
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#include "HttpClient.h"
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#include "Common/macros.h"
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#ifndef _WIN32
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#define ENABLE_MMAP
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#endif
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using namespace std;
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using namespace toolkit;
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namespace mediakit {
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HttpStringBody::HttpStringBody(string str) {
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_str = std::move(str);
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}
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int64_t HttpStringBody::remainSize() {
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return _str.size() - _offset;
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}
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Buffer::Ptr HttpStringBody::readData(size_t size) {
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size = MIN((size_t)remainSize(), size);
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if (!size) {
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//没有剩余字节了
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return nullptr;
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}
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auto ret = std::make_shared<BufferString>(_str, _offset, size);
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_offset += size;
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return ret;
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}
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//////////////////////////////////////////////////////////////////
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#ifdef ENABLE_MMAP
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static mutex s_mtx;
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static unordered_map<string /*file_path*/, std::tuple<char */*ptr*/, int64_t /*size*/, weak_ptr<char> /*mmap*/ > > s_shared_mmap;
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//删除mmap记录
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static void delSharedMmap(const string &file_path, char *ptr) {
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lock_guard<mutex> lck(s_mtx);
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auto it = s_shared_mmap.find(file_path);
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if (it != s_shared_mmap.end() && std::get<0>(it->second) == ptr) {
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s_shared_mmap.erase(it);
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}
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}
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static std::shared_ptr<char> getSharedMmap(const string &file_path, int64_t &file_size) {
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{
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lock_guard<mutex> lck(s_mtx);
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auto it = s_shared_mmap.find(file_path);
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if (it != s_shared_mmap.end()) {
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auto ret = std::get<2>(it->second).lock();
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if (ret) {
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//命中mmap缓存
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file_size = std::get<1>(it->second);
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return ret;
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}
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}
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}
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//打开文件
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std::shared_ptr<FILE> fp(fopen(file_path.data(), "rb"), [](FILE *fp) {
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if (fp) {
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fclose(fp);
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}
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});
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if (!fp) {
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//文件不存在
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file_size = -1;
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return nullptr;
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}
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//获取文件大小
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file_size = File::fileSize(fp.get());
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int fd = fileno(fp.get());
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if (fd < 0) {
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WarnL << "fileno failed:" << get_uv_errmsg(false);
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return nullptr;
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}
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auto ptr = (char *)mmap(NULL, file_size, PROT_READ, MAP_SHARED, fd, 0);
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if (ptr == MAP_FAILED) {
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WarnL << "mmap " << file_path << " failed:" << get_uv_errmsg(false);
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return nullptr;
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}
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std::shared_ptr<char> ret(ptr, [file_size, fp, file_path](char *ptr) {
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munmap(ptr, file_size);
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delSharedMmap(file_path, ptr);
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});
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#if 0
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if (file_size < 10 * 1024 * 1024 && file_path.rfind(".ts") != string::npos) {
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//如果是小ts文件，那么尝试先加载到内存
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auto buf = BufferRaw::create();
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buf->assign(ret.get(), file_size);
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ret.reset(buf->data(), [buf, file_path](char *ptr) {
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delSharedMmap(file_path, ptr);
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});
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}
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#endif
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{
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lock_guard<mutex> lck(s_mtx);
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s_shared_mmap[file_path] = std::make_tuple(ret.get(), file_size, ret);
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}
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return ret;
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}
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#endif
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HttpFileBody::HttpFileBody(const string &file_path, bool use_mmap) {
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#ifdef ENABLE_MMAP
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if (use_mmap ) {
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_map_addr = getSharedMmap(file_path, _read_to);
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}
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#endif
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if (!_map_addr && _read_to != -1) {
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//mmap失败(且不是由于文件不存在导致的)或未执行mmap时，才进入fread逻辑分支
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_fp.reset(fopen(file_path.data(), "rb"), [](FILE *fp) {
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if (fp) {
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fclose(fp);
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}
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});
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if (!_fp) {
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//文件不存在
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_read_to = -1;
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return;
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}
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if (!_read_to) {
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//_read_to等于0时，说明还未尝试获取文件大小
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//加上该判断逻辑，在mmap失败时，可以省去一次该操作
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_read_to = File::fileSize(_fp.get());
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}
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}
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}
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void HttpFileBody::setRange(uint64_t offset, uint64_t max_size) {
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CHECK((int64_t)offset <= _read_to && (int64_t)(max_size + offset) <= _read_to);
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_read_to = max_size + offset;
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_file_offset = offset;
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if (_fp && !_map_addr) {
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fseek64(_fp.get(), _file_offset, SEEK_SET);
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}
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}
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int HttpFileBody::sendFile(int fd) {
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#if defined(__linux__) || defined(__linux)
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if (!_fp) {
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return -1;
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}
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static onceToken s_token([]() { signal(SIGPIPE, SIG_IGN); });
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off_t off = _file_offset;
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return sendfile(fd, fileno(_fp.get()), &off, _read_to - _file_offset);
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#else
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return -1;
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#endif
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}
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class BufferMmap : public Buffer {
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public:
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using Ptr = std::shared_ptr<BufferMmap>;
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BufferMmap(const std::shared_ptr<char> &map_addr, size_t offset, size_t size) {
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_map_addr = map_addr;
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_data = map_addr.get() + offset;
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_size = size;
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}
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~BufferMmap() override = default;
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//返回数据长度
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char *data() const override { return _data; }
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size_t size() const override { return _size; }
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private:
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char *_data;
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size_t _size;
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std::shared_ptr<char> _map_addr;
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};
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int64_t HttpFileBody::remainSize() {
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return _read_to - _file_offset;
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}
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Buffer::Ptr HttpFileBody::readData(size_t size) {
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size = (size_t)(MIN(remainSize(), (int64_t)size));
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if (!size) {
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//没有剩余字节了
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return nullptr;
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}
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if (!_map_addr) {
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// fread模式
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ssize_t iRead;
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auto ret = _pool.obtain2();
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ret->setCapacity(size + 1);
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do {
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iRead = fread(ret->data(), 1, size, _fp.get());
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} while (-1 == iRead && UV_EINTR == get_uv_error(false));
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if (iRead > 0) {
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//读到数据了
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ret->setSize(iRead);
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_file_offset += iRead;
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return std::move(ret);
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}
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//读取文件异常，文件真实长度小于声明长度
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_file_offset = _read_to;
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WarnL << "read file err:" << get_uv_errmsg();
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return nullptr;
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}
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// mmap模式
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auto ret = std::make_shared<BufferMmap>(_map_addr, _file_offset, size);
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_file_offset += size;
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return ret;
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}
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//////////////////////////////////////////////////////////////////
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HttpMultiFormBody::HttpMultiFormBody(const HttpArgs &args, const string &filePath, const string &boundary) {
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_fileBody = std::make_shared<HttpFileBody>(filePath);
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if (_fileBody->remainSize() < 0) {
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throw std::invalid_argument(StrPrinter << "open file failed：" << filePath << " " << get_uv_errmsg());
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}
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auto fileName = filePath;
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auto pos = filePath.rfind('/');
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if (pos != string::npos) {
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fileName = filePath.substr(pos + 1);
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}
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_bodyPrefix = multiFormBodyPrefix(args, boundary, fileName);
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_bodySuffix = multiFormBodySuffix(boundary);
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_totalSize = _bodyPrefix.size() + _bodySuffix.size() + _fileBody->remainSize();
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}
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int64_t HttpMultiFormBody::remainSize() {
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return _totalSize - _offset;
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}
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Buffer::Ptr HttpMultiFormBody::readData(size_t size) {
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if (_bodyPrefix.size()) {
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auto ret = std::make_shared<BufferString>(_bodyPrefix);
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_offset += _bodyPrefix.size();
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_bodyPrefix.clear();
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return ret;
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}
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if (_fileBody->remainSize()) {
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auto ret = _fileBody->readData(size);
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if (!ret) {
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//读取文件出现异常，提前中断
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_offset = _totalSize;
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} else {
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_offset += ret->size();
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}
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return ret;
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}
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if (_bodySuffix.size()) {
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auto ret = std::make_shared<BufferString>(_bodySuffix);
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_offset = _totalSize;
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_bodySuffix.clear();
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return ret;
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}
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return nullptr;
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}
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string HttpMultiFormBody::multiFormBodySuffix(const string &boundary) {
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return "\r\n--" + boundary + "--";
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}
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string HttpMultiFormBody::multiFormContentType(const string &boundary) {
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return StrPrinter << "multipart/form-data; boundary=" << boundary;
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}
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string HttpMultiFormBody::multiFormBodyPrefix(const HttpArgs &args, const string &boundary, const string &fileName) {
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string MPboundary = string("--") + boundary;
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_StrPrinter body;
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for (auto &pr : args) {
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body << MPboundary << "\r\n";
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body << "Content-Disposition: form-data; name=\"" << pr.first << "\"\r\n\r\n";
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body << pr.second << "\r\n";
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}
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body << MPboundary << "\r\n";
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body << "Content-Disposition: form-data; name=\""
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<< "file"
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<< "\"; filename=\"" << fileName << "\"\r\n";
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body << "Content-Type: application/octet-stream\r\n\r\n";
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return std::move(body);
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}
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HttpBufferBody::HttpBufferBody(Buffer::Ptr buffer) {
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_buffer = std::move(buffer);
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}
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int64_t HttpBufferBody::remainSize() {
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return _buffer ? _buffer->size() : 0;
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}
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Buffer::Ptr HttpBufferBody::readData(size_t size) {
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return Buffer::Ptr(std::move(_buffer));
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}
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} // namespace mediakit
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