UriParser.cpp

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/*
 * SPDX-License-Identifier: GPL-2.0-or-later
 * SPDX-FileName: UriParser.cpp
 * SPDX-FileContributor: Dmitry Vedenko
 */
 
#include "UriParser.h"
 
UriFields ParseUri(std::string_view uri) noexcept
{
   UriFields result;
   auto schemeEnd = uri.find("://");
   if (schemeEnd != std::string_view::npos)
   {
      result.Scheme = uri.substr(0, schemeEnd);
      uri.remove_prefix(schemeEnd + 3);
   }
 
   auto fragmentStart = uri.find('#');
   if (fragmentStart != std::string_view::npos)
   {
      result.Fragment = uri.substr(fragmentStart + 1);
      uri.remove_suffix(uri.size() - fragmentStart);
   }
 
   auto queryStart = uri.find('?');
   if (queryStart != std::string_view::npos)
   {
      result.Query = uri.substr(queryStart + 1);
      uri.remove_suffix(uri.size() - queryStart);
   }
 
   auto pathStart = uri.find('/');
   if (pathStart != std::string_view::npos)
   {
      result.Path = uri.substr(pathStart + 1);
      uri.remove_suffix(uri.size() - pathStart);
   }
 
   auto userInfoEnd = uri.find('@');
   if (userInfoEnd != std::string_view::npos)
   {
      result.UserInfo = uri.substr(0, userInfoEnd);
      uri.remove_prefix(userInfoEnd + 1);
   }
 
   auto portStart = uri.find(':');
   if (portStart != std::string_view::npos)
   {
      result.Port = uri.substr(portStart + 1);
      uri.remove_suffix(uri.size() - portStart);
   }
 
   result.Host = uri;
 
   return result;
}
 
QueryFields ParseUriQuery(std::string_view query, std::string_view delimiter) noexcept
{
   QueryFields result;
 
   while (!query.empty())
   {
      const auto queryItemEnd = query.find(delimiter);
      const auto queryItem = query.substr(0, queryItemEnd);
 
      query.remove_prefix(
         queryItemEnd != std::string_view::npos ? queryItemEnd + 1 :
                                                  query.size());
 
      const auto queryItemValueStart = queryItem.find('=');
 
      const auto queryItemValue = queryItem.substr(
         queryItemValueStart != std::string_view::npos ?
            queryItemValueStart + 1 :
            queryItem.size());
 
      const auto queryItemKey = queryItem.substr(
         0, queryItemValueStart != std::string_view::npos ?
               queryItemValueStart :
               queryItem.size());
 
      result.emplace(queryItemKey, queryItemValue);
   }
 
   return result;
}