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filesystemrequesthandler.cpp
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#include "filesystemrequesthandler.h"
#include "httputility.h"
#include <fstream>
#include <iostream>
#include <sstream>
#include <system.io.path.h>
#include <system.io.fileinfo.h>
#include <regex>
FileSystemRequestHandler::FileSystemRequestHandler()
: _root(System::IO::DirectoryInfo("")), _logging([] (const std::string& message) { std::cout << message << std::endl; })
{
_mimeTypes.LoadDefaultMimeTypes();
}
FileSystemRequestHandler::~FileSystemRequestHandler() { }
void FileSystemRequestHandler::SetRoot(const std::string& root)
{
_root = System::IO::DirectoryInfo(root);
}
void FileSystemRequestHandler::SetLogging(std::function<void(const std::string&)> logging)
{
this->_logging = logging;
}
MimeTypes &FileSystemRequestHandler::GetMimeTypes()
{
return _mimeTypes;
}
int FileSystemRequestHandler::ConstructResponse(const web::Request &request, web::Response& response) const
{
_logging(request._method);
auto uri = request._uri;
if (uri[0] != '/')
{
return 500;
}
uri = uri.substr(1);
uri = url_decode(uri);
auto fullPath = System::IO::Path::Combine(this->_root.FullName(), uri);
_logging(fullPath);
for (auto header : request._headers)
{
std::stringstream sss;
sss << "[header] " << header.first << ": " << header.second;
_logging(sss.str());
}
std::stringstream ss;
if (System::IO::DirectoryInfo(fullPath).Exists())
{
ss << "<html><body>";
System::IO::DirectoryInfo directory(fullPath);
ss << "<h1>" << request._uri << "</h1>";
ss << "<h2>Directories:</h2>";
ss << "<ul>";
if (request._uri != "/")
{
auto relativeParentPath = directory.Parent().FullName().substr(this->_root.FullName().size());
if (relativeParentPath == "") relativeParentPath = "/";
ss << "<li><a href=\"" << relativeParentPath << "\">..</a></li>";
}
for (auto dir : directory.GetDirectories())
{
System::IO::DirectoryInfo dirInfo(dir);
auto relativePath = dirInfo.FullName().substr(this->_root.FullName().size());
ss << "<li><a href=\"" << relativePath << "\">" << dirInfo.Name() << "</a></li>";
}
ss << "</ul>";
ss << "<h2>Files:</h2>";
ss << "<ul>";
for (auto file : directory.GetFiles())
{
System::IO::FileInfo fileInfo(file);
auto relativePath = fileInfo.FullName().substr(this->_root.FullName().size());
ss << "<li><a href=\"" << relativePath << "\">" << fileInfo.Name() << "</a></li>";
}
ss << "</ul>";
ss << "</body></html>";
response.addHeader("Content-Type", "text/html");
}
else if (System::IO::FileInfo(fullPath).Exists())
{
std::ifstream file;
auto extpos = fullPath.find_last_of('.');
auto ext = extpos != std::string::npos ? fullPath.substr(extpos) : "";
file = std::ifstream(fullPath, std::ios::binary);
response.addHeader("Content-Type", _mimeTypes[ext]);
std::copy(std::istreambuf_iterator<char>(file),
std::istreambuf_iterator<char>(),
std::ostreambuf_iterator<char>(ss));
}
else
{
ss << "<html><body>";
ss << request._uri << " does not exist";
ss << "</body></html>";
response.addHeader("Content-Type", "text/html");
}
response._response += ss.str();
if (request._headers.find("Range") != request._headers.end())
{
auto range = request._headers.at("Range");
std::regex rangeRegex("bytes=([0-9]+)-([0-9]*)");
std::smatch str_match_result;
if (std::regex_match(range, str_match_result, rangeRegex))
{
auto start = std::stoi(str_match_result[1]);
auto end = str_match_result[2] != "" ? std::stoi(str_match_result[2]) : start + 500;
std::stringstream contentRange;
contentRange << "bytes " << start << "-" << (start+500) << "/" << response._response.size();
response._headers["Content-Range"] = contentRange.str();
response._response = response._response.substr(start, end - start);
response._responseCode = 206;
}
}
return 200;
}