Socket Programming Issue: Errenous download of File

Question

I tried to write C++ code to receive a file from files.rcsb.org programmatically. Finally succeeded in connecting, sending and receiving the data. However, The download is not happening religiously. Every 102nd line (8080 chars), a text 2000 is added in between the lines destroying the format of PDB which renders the downstream processing useless and unusable.

101 REMARK 3 ESTIMATED COORDINATE ERROR.
102 REMARK 3
103 2000
104 ESD FROM LUZZATI PLOT (A) : 0.16

This above is supposed to be:

101 REMARK 3 ESTIMATED COORDINATE ERROR.
102 REMARK 3 ESD FROM LUZZATI PLOT (A) : 0.16

More details:

1. The line is read only 11 characters instead of 80 characters (getline method)
2. The next distortion happens at 203 or 204th line with reading only 22 characters, incremented by 11.
3. This goes on till 77 and again it retracts back.

Can some one help me fixing this logic bug.

The data is read in Binary form. The classes I created /used are available as tgz files with this link: https://drive.google.com/file/d/12kewHTt86k6u6qbtvgf4bgS6SJC_KmLj/view?usp=drive_link

Here is the code:

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <algorithm>
#include "BioSocketStream.h" // Assuming this contains the BioSocketStream class

using namespace std;

bool downloadPdbFile(const string& pdbid, ostream& fout = std::cout)
{
    const string hostn = "132.249.213.110";
    const string doc = "/download/" + pdbid + ".pdb?fileFormat=mmcif&compression=NO";

    cerr << hostn << "," << doc << endl;

    BioSocketStream web;
    if (!web.connect(hostn.c_str(), 80))
    {
        cerr << "Host not found" << endl;
        return false;
    }

    web << "GET " << doc << " HTTP/1.0" << crlf;
    web << crlf;

   // Now read the response

    string response;
    long int filesize =0;

    while (getline(web, response))
    {
        if (response.substr(0, 6) == "HEADER")
        {
                response.erase(std::remove(response.begin(), response.end(), '\r'), response.end());
//              response.erase(std::remove(response.begin(), response.end(), '\n'), response.end());
            filesize+=response.length();
            fout << response.substr(0,79) << "\t" << filesize<<"\t"<<response.length()<<endl;
            while (getline(web, response) && (response.substr(0, 3) != "END"))
            {
                response.erase(std::remove(response.begin(), response.end(), '\r'), response.end());
//              response.erase(std::remove(response.begin(), response.end(), '\n'), response.end());
            //    fout << response << endl;
        //      filesize++;

                if ( response.length() < 79)
                {
                        cout<<response<<"\t"<<response.length()<<"\t"<<endl;
                        for(int i = 0; i < response.length();i++)
                        {
                                cout<<response[i]<<"***";
                        }
                        cout<<endl;
                }
            filesize+=response.length();
            fout << response.substr(0,79) << "\t" << filesize<<"\t"<<response.length()<<endl;
            response = "";
            }
            response = "";
        }
        else
        {
            continue;
        }

    }
    cout<<"the filesize: "<<filesize<<endl;


    return true;
}

int main()
{
    string pdbid = "2apr";
    ofstream f("junk.pdb",std::ofstream::binary);
    if (downloadPdbFile(pdbid,f))
    {
        cout << "File downloaded successfully." << endl;
        return 0;
    }
    else
    {
        cout << "Failed to download file." << endl;
        return -1;
    }
}

Thank you for your time, Looking forward for some pointers. I read the related posts but they have not helped. Any pointer will be gratefully appreciated.