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#include "static-files.h"
#include <boost/algorithm/string/predicate.hpp>
#include <filesystem>
#include <fstream>
#include <iostream>
#include <string>
using namespace std::string_literals;
namespace fs = std::filesystem;
namespace {
// Return a reasonable mime type based on the extension of a file.
std::string
mime_type(fs::path path)
{
using boost::algorithm::iequals;
auto const ext = [&path]
{
size_t pos = path.string().rfind(".");
if (pos == std::string::npos)
return std::string{};
return path.string().substr(pos);
}();
if(iequals(ext, ".htm")) return "text/html"; // TODO: unordered_map
if(iequals(ext, ".html")) return "text/html";
if(iequals(ext, ".php")) return "text/html";
if(iequals(ext, ".css")) return "text/css";
if(iequals(ext, ".txt")) return "text/plain";
if(iequals(ext, ".js")) return "application/javascript";
if(iequals(ext, ".json")) return "application/json";
if(iequals(ext, ".xml")) return "application/xml";
if(iequals(ext, ".swf")) return "application/x-shockwave-flash";
if(iequals(ext, ".flv")) return "video/x-flv";
if(iequals(ext, ".png")) return "image/png";
if(iequals(ext, ".jpe")) return "image/jpeg";
if(iequals(ext, ".jpeg")) return "image/jpeg";
if(iequals(ext, ".jpg")) return "image/jpeg";
if(iequals(ext, ".gif")) return "image/gif";
if(iequals(ext, ".bmp")) return "image/bmp";
if(iequals(ext, ".ico")) return "image/vnd.microsoft.icon";
if(iequals(ext, ".tiff")) return "image/tiff";
if(iequals(ext, ".tif")) return "image/tiff";
if(iequals(ext, ".svg")) return "image/svg+xml";
if(iequals(ext, ".svgz")) return "image/svg+xml";
return "application/text";
}
std::string getFile(const fs::path& filename)
{
std::ifstream file(filename.string(), std::ios::in | std::ios::binary | std::ios::ate);
if (file.is_open()) {
std::ifstream::pos_type fileSize = file.tellg();
file.seekg(0, std::ios::beg);
std::string bytes(fileSize, ' ');
file.read(reinterpret_cast<char*>(bytes.data()), fileSize);
return bytes;
} else {
throw std::runtime_error("Opening "s + filename.string() + " for reading");
}
}
fs::path extend_index_html(fs::path path)
{
if (path.string().size() == 0 || path.string().back() == '/')
return path / "index.html";
return path;
}
// Used to return errors by generating response page and HTTP status code
std::string HttpStatus(std::string status, std::string message, std::function<plugin_interface_setter_type>& SetResponseHeader)
{
SetResponseHeader("status", status);
SetResponseHeader("content_type", "text/html");
return status + " " + message;
}
}
std::string static_files_plugin::name()
{
return "static-files";
}
static_files_plugin::static_files_plugin()
{
//std::cout << "Plugin constructor" << std::endl;
}
static_files_plugin::~static_files_plugin()
{
//std::cout << "Plugin destructor" << std::endl;
}
std::string static_files_plugin::generate_page(
std::function<std::string(const std::string& key)>& GetServerParam,
std::function<std::string(const std::string& key)>& GetRequestParam, // request including body (POST...)
std::function<void(const std::string& key, const std::string& value)>& SetResponseHeader // to be added to result string
)
{
try {
// Make sure we can handle the method
std::string method {GetRequestParam("method")};
if (method != "GET" && method != "HEAD")
return HttpStatus("400", "Unknown HTTP method", SetResponseHeader);
// Request path must not contain "..".
std::string rel_target{GetRequestParam("rel_target")};
std::string target{GetRequestParam("target")};
if (rel_target.find("..") != std::string::npos) {
return HttpStatus("400", "Illegal request: "s + target, SetResponseHeader);
}
// Build the path to the requested file
std::string doc_root{GetRequestParam("doc_root")};
fs::path path {fs::path{doc_root} / rel_target};
if (target.size() && target.back() != '/' && fs::is_directory(path)) {
std::string location{GetRequestParam("location") + "/"s};
SetResponseHeader("location", location);
return HttpStatus("301", "Correcting directory path", SetResponseHeader);
}
path = {extend_index_html(path)};
SetResponseHeader("content_type", mime_type(path));
try {
return getFile(path);
} catch (const std::runtime_error& ex) {
return HttpStatus("404", "Not found: "s + GetRequestParam("target"), SetResponseHeader);
} catch (const std::exception& ex) {
return HttpStatus("500", "Internal Server Error: "s + ex.what(), SetResponseHeader);
}
} catch (const std::exception& ex) {
return HttpStatus("500", "Unknown Error: "s + ex.what(), SetResponseHeader);
}
}
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