You must write a HTTP server in C++ 98.

Your executable will be run as follows:

./webserv [configuration file]

• The server supports GET, POST and DELETE requests.
• The server supports CGI scripts that are not NPH (non-parsed header).
  • The script MUST output a double CRLF sequence, \r\n\r\n. If it's not output by the script, the server will add it itself and potentially ruin headers added by the CGI.
  • Similarly, if the server detects an unintended double CRLF, it won't add one itself, potentially letting the content remain in the headers section.
• HTTP redirection is implemented internally.

Server configuration file is by default searched at conf/webserv.conf, otherwise is taken as a program argument.

The file is parsed just as an ordinary nginx configuration file, with certain exceptions:

• Options for directives are not supported.
• Regular expressions are not supported.
• Escape characters and quotes are not supported.
• The file is parsed from top to bottom, hence directives are inherited from top to bottom; directives specified above a lower context will be inherited, while directives specified below a lower context will not be inherited.
• events context is neither supported nor required.
• fastcgi_pass, fastcgi_param are replaced by cgi directive that works in the following way:

  cgi abs_path_to_bin extension_without_dot;
  

• limit_except is a directive, not a context. It gets methods in an argument list (much like index).

Please be welcome to create pull requests to solve the following issues:

• There's a heisenbug in "parser.cpp" file on Line 138 that from time to time throws "*** malloc trying to deallocate not allocated memory" when server::flush_indices() is called upon a server::server(const base_dir&) instantiation. Can be relieved by using std::cout statements around those lines.
• The server is not working in a round-robin fashion (which is preferable) due the responses and the requests being held by value, not by pointer. Therefore, it's preferable to have a response_pointer_list and request_pointer_list instead of response_list and request_list to be able to freely push semi-received/sent requests/responses to the back of the queue without copying.
• Since getenv() and getcwd() are no longer allowed by the subject, DOCUMENT_ROOT environment variable to CGI is a relative path instead of absolute: a workaround is to take in environ as main()'s third argument and grab the value of PWD as the absolute document root.
• Since usleep() is no longer allowed by the subject, we are yet to see a portable and interoperable way to create a time-out mechanism for CGI scripts that returns the "504 Gateway Timeout" error.

Team "The It":

• Anahit Apresyan | aapresya: parsing, design & class hierarchy, responses (GET method), testing & quality assurance
• Alexander Israelyan | aisraely: parsing, design & class hierarchy, requests, responses (POST, DELETE methods), testing & quality assurance