将文件从 Boost filtering_streambuf解压缩到 std：：vector<unsigned char>？

Decompress file from Boost filtering_streambuf to std::vector<unsigned char>?

本文关键字：vector lt unsigned gt char std Boost 文件 filtering 解压缩 streambuf      更新时间：2023-10-16

我正在编写一个执行SSL 3.1加密解密数据交换的程序。我收到的数据也以 gzip 格式压缩。我能够解密这些数据并将其打印到我的控制台，使用以下代码

： 
void decompress(unsigned char * arr, int nCopySize, std::vector <unsigned char>& vecArg)
{
    using namespace boost::iostreams;
    using namespace boost::interprocess;
    std::string str1(reinterpret_cast<const char *>(arr), nCopySize);
    auto sizeT = str1.size();
    stringstream file2(str1, ios_base::in | ios_base::binary);
    filtering_streambuf<input> iin;
    iin.push(gzip_decompressor());
    iin.push(file2);
    boost::iostreams::copy(iin, cout);

此处停止工作（解压缩的代码已成功在控制台中打印）

    boost::interprocess::basic_vectorstream<std::vector<char>> vectorStream;
    boost::iostreams::copy(iin, vectorStream); // this produces compile time error
    std::vector<unsigned char> chars(
        vectorStream.vector().begin(),
        vectorStream.vector().end()
        );

}

我正在尝试将解压缩的代码存储到无符号的字符向量中，但是在使用此处找到的最后一段代码时：将文件从 Boost filtering_streambuf解压缩到 std：：vector？我有这个编译时错误： 

Error   5   error C2243: 'type cast' : conversion from 'boost::interprocess::basic_vectorstream<std::vector<char,std::allocator<char>>,std::char_traits<char>> *' to 'volatile const std::basic_streambuf<char,std::char_traits<char>> *' exists, but is inaccessible   c:boost_1_59_0boostiostreamstraits.hpp  57  1   TeraLauncher

我已经进行了其他尝试，使用 char 数组或字符串，设法编译但遇到了运行时崩溃。理想情况下，我希望它与我编写的代码（std：：vector）一起使用。谢谢

Live On Coliru 

#include <boost/iostreams/stream.hpp>
#include <boost/iostreams/filter/gzip.hpp>
#include <boost/iostreams/filtering_streambuf.hpp>
#include <boost/iostreams/device/array.hpp>
#include <iostream>
#include <vector>
#include <iterator>
namespace bio = boost::iostreams;
void decompress(unsigned char const* arr, std::size_t nCopySize, std::vector <unsigned char>& vecArg) {
    bio::array_source arrs{ reinterpret_cast<char const*>(arr), nCopySize };
    bio::filtering_istreambuf iin;
    iin.push(bio::gzip_decompressor{});
    iin.push(arrs);
    vecArg.assign(std::istreambuf_iterator<char>{&iin}, {});
}
int main() {
    /*
     * If you really want to hear about it, the first thing you'll probably want to know is
     * where I was born, an what my lousy childhood was like, and how my parents were
     * occupied and all before they had me, and all that David Copperfield kind of crap, but I
     * don't feel like going into it, if you want to know the truth. In the first place, that stuff
     * bores me, and in the second place, my parents would have about two hemorrhages apiece
     * if I told anything pretty personal about them. They're quite touchy about anything like
     * that, especially my father.
     */
    unsigned char sample[] = {
        0x1f, 0x8b, 0x08, 0x00, 0x8a, 0x47, 0xd7, 0x56, 0x00, 0x03, 0x55, 0x52, 0x4b, 0x76, 0xc3, 0x20, 0x10, 0xdb, 0xfb, 0x14, 0xda, 0x65, 0xe3, 0x97,
        0x4b, 0xb4, 0x1b, 0xef, 0x7b, 0x81, 0x31, 0x0c, 0x81, 0x17, 0xc2, 0x50, 0x3e, 0xf5, 0xf3, 0xed, 0x3b, 0xd8, 0x69, 0x5e, 0xba, 0x84, 0x91, 0x34,
        0x92, 0x60, 0x71, 0xd8, 0xa5, 0xa3, 0x30, 0xc5, 0xb8, 0x63, 0xa3, 0xd4, 0xd0, 0x04, 0x9e, 0xa9, 0x80, 0x56, 0xe9, 0x0d, 0xa1, 0xcd, 0x68, 0x9e,
        0xe1, 0x42, 0xa9, 0x3a, 0xf3, 0x21, 0xdd, 0x06, 0xe3, 0x12, 0x23, 0x72, 0x91, 0x95, 0xd6, 0x37, 0xda, 0x3d, 0xc9, 0x86, 0x50, 0xa7, 0xcd, 0x73,
        0x61, 0x2c, 0x7a, 0x5f, 0xb1, 0x4a, 0x49, 0x33, 0x28, 0x61, 0xf3, 0xd4, 0xf0, 0xd8, 0x11, 0xa5, 0xd7, 0x1d, 0xc6, 0x87, 0x68, 0xbd, 0x88, 0x3d,
        0x40, 0x31, 0xdc, 0x79, 0x80, 0x2c, 0xbc, 0x2a, 0x28, 0x28, 0x53, 0xe1, 0xd4, 0x2a, 0x36, 0x15, 0x9a, 0xc4, 0x98, 0x9e, 0x03, 0xdb, 0x03, 0xa0,
        0x3e, 0xb1, 0xb2, 0x13, 0x5d, 0xa0, 0xb6, 0x76, 0x78, 0xb2, 0x78, 0x3c, 0xc9, 0x63, 0xd6, 0xc6, 0x9a, 0x4f, 0xfa, 0x09, 0x16, 0x1f, 0x92, 0x33,
        0x17, 0x17, 0x38, 0x5a, 0xdc, 0x83, 0xce, 0xc5, 0xc1, 0x14, 0xca, 0x33, 0x56, 0x0d, 0xb6, 0x4c, 0x56, 0xd2, 0xa5, 0xc1, 0x31, 0xc7, 0xc3, 0x00,
        0x6e, 0x32, 0xc2, 0x85, 0xa4, 0x49, 0x46, 0xea, 0x70, 0x56, 0xf3, 0x2f, 0xdc, 0x68, 0xa2, 0x95, 0xde, 0xfc, 0x15, 0x4b, 0x7a, 0xeb, 0x25, 0x47,
        0x32, 0x3c, 0x9f, 0xcb, 0x6b, 0xeb, 0xce, 0x4d, 0x9a, 0x9b, 0xeb, 0xcb, 0x59, 0x38, 0xc1, 0x95, 0x8d, 0xe8, 0xe9, 0x89, 0x7e, 0xcf, 0x29, 0x5d,
        0x4d, 0x7a, 0xfa, 0xe1, 0x67, 0xed, 0x6d, 0x1b, 0xaf, 0xf0, 0x90, 0x52, 0x3c, 0xdd, 0x54, 0x88, 0xb4, 0x00, 0xc3, 0x93, 0x7a, 0x5a, 0xd4, 0x4c,
        0x1c, 0x5d, 0xec, 0xe7, 0x63, 0xe4, 0xc2, 0xad, 0xa9, 0x12, 0x97, 0x2a, 0x89, 0xe2, 0x1f, 0x5f, 0xc9, 0x57, 0x7c, 0x69, 0x43, 0x17, 0x6d, 0xea,
        0xbb, 0x87, 0xa6, 0xc6, 0xa5, 0x1b, 0xbf, 0x3f, 0x01, 0x2f, 0xfe, 0x88, 0x3e, 0x0d, 0xe3, 0x33, 0xb8, 0x66, 0x36, 0xe1, 0xf8, 0x09, 0xea, 0xcd,
        0x91, 0x8a, 0x94, 0xeb, 0xf4, 0x0b, 0xb2, 0xb3, 0x9b, 0x5a, 0x23, 0x02, 0x00, 0x00 };
    std::vector<unsigned char> d;
    decompress(sample, sizeof(sample), d);
    std::cout.write(reinterpret_cast<char const*>(&*d.begin()), d.size());
}

指纹

If you really want to hear about it, the first thing you'll probably want to know is
where I was born, an what my lousy childhood was like, and how my parents were
occupied and all before they had me, and all that David Copperfield kind of crap, but I
don't feel like going into it, if you want to know the truth. In the first place, that stuff
bores me, and in the second place, my parents would have about two hemorrhages apiece
if I told anything pretty personal about them. They're quite touchy about anything like
that, especially my father.
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