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#include "common.hh"
#include <cstdlib>
#if HAVE_FASTCGI
#include <fcgio.h>
#endif
#include <memory>
#include "cgi.hh"
#include "header_parser.hh"
#include "multipart_formdata_parser.hh"
#include "strutils.hh"
#include "query_parser.hh"
namespace stuff {
namespace {
class CGIImpl : public CGI {
public:
void post_data(std::vector<char>* data) override {
if (!have_post_data_) {
fill_post_data();
}
data->assign(post_data_.begin(), post_data_.end());
}
bool post_data(std::map<std::string, std::string>* data) override {
data->clear();
if (!have_post_data_) {
fill_post_data();
}
auto ct = getparam("CONTENT_TYPE");
if (!ct) return false;
std::string type;
std::map<std::string, std::string> params;
if (!HeaderParser::parse(ct, &type, ¶ms)) {
return false;
}
if (type.compare("application/x-www-form-urlencoded") == 0) {
return QueryParser::parse(std::string(post_data_.data(),
post_data_.size()), data);
} else if (type.compare("multipart/form-data") == 0) {
auto it = params.find("boundary");
if (it == params.end()) return false;
return MultipartFormDataParser::parse(post_data_, it->second, data);
}
return false;
}
void query_data(std::map<std::string, std::string>* data) override {
data->clear();
auto qs = getparam("QUERY_STRING");
if (qs) {
QueryParser::parse(qs, data);
}
}
std::string request_path() override {
auto path = getparam("PATH_INFO");
return path ? path : "";
}
std::string request_uri() override {
auto path = getparam("REQUEST_URI");
return path ? path : "";
}
std::string remote_addr() override {
auto path = getparam("REMOTE_ADDR");
return path ? path : "";
}
std::string http_auth() override {
auto auth = getparam("HTTP_AUTHORIZATION");
return auth ? auth : "";
}
std::string content_type() override {
auto ct = getparam("CONTENT_TYPE");
if (!ct) return "";
std::string type;
if (!HeaderParser::parse(ct, &type, nullptr)) return "";
return type;
}
enum request_type request_type() override {
auto p = getparam("REQUEST_METHOD");
if (p) {
auto method = ascii_tolower(p);
if (method.compare("get") == 0) return GET;
if (method.compare("post") == 0) return POST;
if (method.compare("head") == 0) return HEAD;
if (method.compare("put") == 0) return PUT;
if (method.compare("trace") == 0) return TRACE;
}
return UNKNOWN;
}
virtual void reset() {
have_post_data_ = false;
post_data_.clear();
}
protected:
CGIImpl()
: have_post_data_(false) {
}
virtual const char* getparam(const char* name) = 0;
private:
void fill_post_data() {
have_post_data_ = true;
switch (request_type()) {
case POST:
case PUT: {
auto len = getparam("CONTENT_LENGTH");
std::string tmpstr;
if (len && HeaderParser::parse(len, &tmpstr, nullptr)) {
char* end = nullptr;
errno = 0;
auto tmp = strtoul(tmpstr.c_str(), &end, 10);
if (errno == 0 && end && !*end) {
post_data_.resize(tmp);
std::cin.read(post_data_.data(), tmp);
post_data_.resize(std::cin.gcount());
return;
}
}
while (std::cin.good()) {
char buf[1024];
std::cin.read(buf, sizeof(buf));
post_data_.insert(post_data_.end(),
buf, buf + std::cin.gcount());
}
break;
}
case GET:
case HEAD:
case TRACE:
case UNKNOWN:
break;
}
}
bool have_post_data_;
std::vector<char> post_data_;
};
class BasicCGIImpl : public CGIImpl {
public:
BasicCGIImpl()
: CGIImpl() {
}
~BasicCGIImpl() override {
}
protected:
const char* getparam(const char* name) override {
return getenv(name);
}
};
#if HAVE_FASTCGI
class FastCGIImpl : public CGIImpl {
public:
FastCGIImpl()
: CGIImpl(), params_(nullptr) {
}
~FastCGIImpl() override {
}
void reset(FCGX_ParamArray params) {
CGIImpl::reset();
params_ = params;
}
protected:
using CGIImpl::reset;
const char* getparam(const char* name) override {
return params_ ? FCGX_GetParam(name, params_) : nullptr;
}
private:
FCGX_ParamArray params_;
};
#endif
} // namespace
void CGI::get_data(std::map<std::string,std::string>* data) {
if (post_data(data)) return;
query_data(data);
}
int CGI::run(std::function<bool(CGI*)> handle_request) {
#if HAVE_FASTCGI
if (!FCGX_IsCGI()) {
std::unique_ptr<FastCGIImpl> cgi(new FastCGIImpl());
auto cin_streambuf = std::cin.rdbuf();
auto cout_streambuf = std::cout.rdbuf();
auto cerr_streambuf = std::cerr.rdbuf();
FCGX_Stream* in;
FCGX_Stream* out;
FCGX_Stream* err;
FCGX_ParamArray params;
while (FCGX_Accept(&in, &out, &err, ¶ms) == 0) {
cgi->reset(params);
fcgi_streambuf cin_fcgi_streambuf(in);
fcgi_streambuf cout_fcgi_streambuf(out);
fcgi_streambuf cerr_fcgi_streambuf(err);
std::cin.rdbuf(&cin_fcgi_streambuf);
std::cout.rdbuf(&cout_fcgi_streambuf);
std::cerr.rdbuf(&cerr_fcgi_streambuf);
if (!handle_request(cgi.get())) {
FCGX_SetExitStatus(-1, out);
FCGX_Finish();
return -1;
}
}
std::cin.rdbuf(cin_streambuf);
std::cout.rdbuf(cout_streambuf);
std::cerr.rdbuf(cerr_streambuf);
return 0;
}
#endif
std::unique_ptr<CGIImpl> cgi(new BasicCGIImpl());
return handle_request(cgi.get()) ? 0 : -1;
}
} // namespace stuff
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